Saddle-riding type vehicle

Abstract

To provide a saddle-riding type vehicle having a preferable turning property.SOLUTION: A saddle-riding type vehicle 1 includes an exhaust device 29 that discharges exhaust gas. The exhaust device 29 includes an exhaust port 73. The exhaust port 73 jets exhaust gas to cause a first force to act on the saddle-riding type vehicle 1. When the saddle-riding type vehicle 1 turns in a curved path Cr, the first force cancels at least part of a centrifugal force E acting on the saddle-riding type vehicle 1. The first force is, for example, a reaction force F of a jet flow H. The jet flow H is formed by exhaust gas jetted from the exhaust port 73.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a saddle-ride type vehicle. [Background technology]

[0002] Patent Document 1 discloses a saddle-riding type vehicle. When the saddle-riding type vehicle turns on a curved road, centrifugal force acts on the saddle-riding type vehicle. As an example, when the saddle-riding type vehicle turns to the right on a curved road, centrifugal force acts on the saddle-riding type vehicle to the left. When the saddle-riding type vehicle turns to the left on a curved road, centrifugal force acts on the saddle-riding type vehicle to the right. Hereinafter, the speed of the saddle-riding type vehicle when it turns on a curved road will be referred to as the "turning speed of the saddle-riding type vehicle." As the turning speed of the saddle-riding type vehicle increases, the centrifugal force acting on the saddle-riding type vehicle also increases.

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-104685 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] When the centrifugal force acting on a saddle-riding vehicle increases, skill is required to properly turn the saddle-riding vehicle on a curved road. For example, when the centrifugal force acting on a saddle-riding vehicle increases, the force that causes the saddle-riding vehicle to deviate outward from the curved road increases. Therefore, when driving on a circuit, skill is required to properly turn the saddle-riding vehicle on a curved road while increasing the turning speed of the saddle-riding vehicle. For this reason, there is a demand for saddle-riding vehicles with good turning performance.

[0005] The present invention has been made in view of the above circumstances, and has as its main object to provide a saddle-ride type vehicle with good turning performance. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention has the following configuration. That is, the present invention provides a saddle-riding type vehicle comprising an exhaust device that discharges exhaust gas, the exhaust device comprising a first exhaust port that injects the exhaust gas and applies a first force to the saddle-riding type vehicle, and when the saddle-riding type vehicle turns a curved road, the first force offsets at least a portion of the centrifugal force acting on the saddle-riding type vehicle.

[0007] (Functions and Effects) The saddle-riding type vehicle is equipped with an exhaust device. The exhaust device discharges exhaust gas. The exhaust device is equipped with a first exhaust port. The first exhaust port injects the exhaust gas, causing a first force to act on the saddle-riding type vehicle. When the saddle-riding type vehicle turns a curved road, the first force offsets at least a portion of the centrifugal force acting on the saddle-riding type vehicle.

[0008] Therefore, even if the centrifugal force acting on the saddle-riding type vehicle increases, it is possible to assist the saddle-riding type vehicle to properly turn on a curved road. For example, even if the turning speed of the saddle-riding type vehicle increases when driving on a circuit, it is possible to assist the saddle-riding type vehicle to properly turn on a curved road. Therefore, it is possible to provide a saddle-riding type vehicle with good turning performance.

[0009] In the above-described saddle-ride type vehicle, the first force is preferably a reaction force of the jet of exhaust gas ejected from the first exhaust port. In other words, the first force is preferably directed in a direction opposite to the injection direction of the exhaust gas ejected from the first exhaust port.

[0010] (Operation and Effect) In this case, by injecting exhaust gas from the first exhaust port, it becomes easy for the first exhaust port to apply the first force to the saddle riding type vehicle.

[0011] In the above-described saddle-ride type vehicle, when the saddle-ride type vehicle turns a curved road, it is preferable that the first exhaust port injects the exhaust gas in the same direction as the direction of the centrifugal force acting on the saddle-ride type vehicle.

[0012] (Actions and Effects) For example, when a saddle-riding vehicle turns right on a curved road, centrifugal force acts leftward on the saddle-riding vehicle, and the first exhaust port sprays exhaust gas to the left. For example, when a saddle-riding vehicle turns left on a curved road, centrifugal force acts rightward on the saddle-riding vehicle, and the first exhaust port sprays exhaust gas to the right. Therefore, when a saddle-riding vehicle turns a curved road, it is easy for the first force to offset at least a portion of the centrifugal force acting on the saddle-riding vehicle.

[0013] In the above-described saddle-ride type vehicle, when the saddle-ride type vehicle turns a curved road, it is preferable that the first force includes a first component having a direction opposite to a direction of the centrifugal force acting on the saddle-ride type vehicle.

[0014] (Actions and Effects) In this case, the first force includes a first component. The first component has a direction opposite to the direction of the centrifugal force acting on the saddle-riding vehicle. For example, when the saddle-riding vehicle turns right on a curved road, the centrifugal force acts leftward on the saddle-riding vehicle, and the first component acts rightward on the saddle-riding vehicle. For example, when the saddle-riding vehicle turns left on a curved road, the centrifugal force acts rightward on the saddle-riding vehicle, and the first component acts leftward on the saddle-riding vehicle. Therefore, when the saddle-riding vehicle turns a curved road, it is easy for the first force to cancel out at least a portion of the centrifugal force acting on the saddle-riding vehicle.

[0015] In the above-described straddle-type vehicle, it is preferable that the direction in which exhaust gas is ejected from the first exhaust port changes depending on the lean angle of the straddle-type vehicle to the right and left.

[0016] (Actions and Effects) For example, when a saddle-riding vehicle turns right, the saddle-riding vehicle leans to the right, and centrifugal force acts on the saddle-riding vehicle in a leftward direction. For example, when a saddle-riding vehicle turns left, the saddle-riding vehicle leans to the left, and centrifugal force acts on the saddle-riding vehicle in a rightward direction. In this way, the direction of the centrifugal force changes depending on the angle of inclination of the saddle-riding vehicle to the right or left. Here, the direction in which exhaust gas is ejected from the first exhaust port changes depending on the angle of inclination. Therefore, when a saddle-riding vehicle turns a curved road, it is easy for the first force to offset at least a portion of the centrifugal force.

[0017] In the above-described saddle-riding type vehicle, it is preferable that the first exhaust port is installed so that the exhaust gas is sprayed downward when the saddle-riding type vehicle is in an upright position, and that the first exhaust port sprays exhaust gas when the saddle-riding type vehicle is tilted to the right, and that the first exhaust port sprays exhaust gas when the saddle-riding type vehicle is tilted to the left.

[0018] (Actions and Effects) For example, when a saddle-riding vehicle turns right, it tilts from an upright position to the right. When the saddle-riding vehicle tilts from an upright position to the right, the direction in which exhaust gas is ejected from the first exhaust port changes from below to the left. For example, when a saddle-riding vehicle turns left, it tilts from an upright position to the left. When the saddle-riding vehicle tilts from an upright position to the left, the direction in which exhaust gas is ejected from the first exhaust port changes from below to the right. In summary, the direction in which exhaust gas is ejected from the first exhaust port changes depending on the angle of inclination of the saddle-riding vehicle. When a saddle-riding vehicle turns a curved road, the first exhaust port ejects exhaust gas in the same direction as the centrifugal force. Therefore, when a saddle-riding vehicle turns a curved road, it is easy for the first force to offset at least a portion of the centrifugal force.

[0019] In the above-described saddle-riding type vehicle, it is preferable that the saddle-riding type vehicle includes a tilt angle detection unit that detects the tilt angle of the saddle-riding type vehicle to the right and left, a movement mechanism that changes the injection direction of the exhaust gas from the first exhaust port, and a movement mechanism control unit that controls the movement mechanism based on the detection result of the tilt angle detection unit.

[0020] (Operation and Effect) In this case, it is easy to change the direction in which exhaust gas is ejected from the first exhaust port depending on the tilt angle of the saddle-riding type vehicle. Therefore, when the saddle-riding type vehicle turns on a curved road, it is easy for the first force to offset at least a portion of the centrifugal force.

[0021] In the above-described straddle-type vehicle, it is preferable that the movement mechanism rotates the exhaust device.

[0022] (Operation and Effect) In this case, it is easy to change the injection direction of the exhaust gas from the first exhaust port.

[0023] In the above-described saddle-riding type vehicle, it is preferable that the first exhaust port comprises a right exhaust port installed to inject exhaust gas to the right, and a left exhaust port installed to inject exhaust gas to the left, the exhaust device comprises a path changing unit that changes the path of exhaust gas within the exhaust device and switches between a rightward injection state in which the exhaust gas is injected from the right exhaust port and a leftward injection state in which the exhaust gas is injected from the left exhaust port, and the saddle-riding type vehicle comprises an inclination angle detection unit that detects the inclination angle of the saddle-riding type vehicle to the right and left, and a control unit that controls the path changing unit based on the detection result of the inclination angle detection unit.

[0024] (Actions and Effects) In this case, it is easy to change the direction of exhaust gas injection depending on the tilt angle of the saddle-riding vehicle. Furthermore, when the saddle-riding vehicle turns a curved road, it is easy to inject exhaust gas in the same direction as the centrifugal force. For example, when the saddle-riding vehicle tilts to the right, it is easy to inject exhaust gas from the left exhaust port. For example, when the saddle-riding vehicle tilts to the left, it is easy to inject exhaust gas from the right exhaust port. Therefore, when the saddle-riding vehicle turns a curved road, it is easy for the first force to offset at least a portion of the centrifugal force.

[0025] In the above-described saddle-riding type vehicle, it is preferable that when the tilt angle of the saddle-riding type vehicle to the left is equal to or greater than a first threshold value, the control unit controls the passage changing unit to inject exhaust gas from the right exhaust port, and when the tilt angle of the saddle-riding type vehicle to the right is equal to or greater than a second threshold value, the control unit controls the passage changing unit to inject exhaust gas from the left exhaust port.

[0026] (Operation and Effect) When the lean angle of the saddle riding type vehicle to the left is equal to or greater than the first threshold value, the saddle riding type vehicle is deemed to be turning left. Therefore, when the saddle riding type vehicle is turning left, it is easy to inject exhaust gas from the right exhaust port. Therefore, when the saddle riding type vehicle is turning left, it is easy for the first force to offset at least a portion of the centrifugal force.

[0027] Furthermore, if the lean angle of the saddle riding type vehicle to the right is equal to or greater than the second threshold value, it is determined that the saddle riding type vehicle is turning to the right. Therefore, when the saddle riding type vehicle is turning to the right, it is easy to inject exhaust gas from the left exhaust port. Therefore, when the saddle riding type vehicle is turning to the right, it is easy for the first force to offset at least a portion of the centrifugal force.

[0028] In the above-described saddle-ride type vehicle, it is preferable that the right exhaust port is disposed so that the exhaust gas is sprayed to the right and downward when the saddle-ride type vehicle is in an upright position, and that the left exhaust port is disposed so that the exhaust gas is sprayed to the left and downward when the saddle-ride type vehicle is in an upright position.

[0029] (Actions and Effects) For example, when a saddle-riding vehicle turns right, it tilts from an upright position to the right. When the saddle-riding vehicle tilts from an upright position to the right, the direction in which exhaust gas is ejected from the left exhaust port changes from left and downward to left and horizontal. For example, when a saddle-riding vehicle turns left, it tilts from an upright position to the left. When the saddle-riding vehicle tilts from an upright position to the left, the direction in which exhaust gas is ejected from the right exhaust port changes from right and downward to right and horizontal. In summary, when a saddle-riding vehicle turns a curved road, the first exhaust port ejects exhaust gas in substantially the same direction as the direction of centrifugal force. Therefore, when a saddle-riding vehicle turns a curved road, it is easy for the first force to offset at least a portion of the centrifugal force.

[0030] In the above-described saddle-ride type vehicle, it is preferable that when the saddle-ride type vehicle is in an upright position, the right exhaust port is positioned so that the exhaust gas is sprayed from the right exhaust port in a direction to the right and horizontal, and when the saddle-ride type vehicle is in an upright position, the left exhaust port is positioned so that the exhaust gas is sprayed from the left exhaust port in a direction to the left and horizontal.

[0031] (Actions and Effects) For example, when a saddle-riding vehicle turns right, it tilts from an upright position to the right. When the saddle-riding vehicle tilts from an upright position to the right, the direction in which exhaust gas is ejected from the left exhaust port changes from left and horizontal to left and upward. For example, when a saddle-riding vehicle turns left, it tilts from an upright position to the left. When the saddle-riding vehicle tilts from an upright position to the left, the direction in which exhaust gas is ejected from the right exhaust port changes from right and horizontal to right and upward. In summary, when a saddle-riding vehicle turns a curved road, the first exhaust port ejects exhaust gas in the same direction as the centrifugal force. Therefore, when a saddle-riding vehicle turns a curved road, it is easy for the first force to offset at least a portion of the centrifugal force.

[0032] In the above-described straddle-type vehicle, it is preferable that the right exhaust port includes a plurality of right small exhaust ports, and the left exhaust port includes a plurality of left small exhaust ports.

[0033] (Actions and Effects) The right exhaust port has multiple right small exhaust ports. Therefore, it is easy to expand the direction in which exhaust gas is sprayed from the right exhaust port. Furthermore, it is easy to change the exhaust port from which exhaust gas is sprayed among multiple right small exhaust ports. The left exhaust port has multiple left small exhaust ports. Therefore, it is easy to expand the direction in which exhaust gas is sprayed from the left exhaust port. Furthermore, it is easy to change the exhaust port from which exhaust gas is sprayed among multiple left small exhaust ports.

[0034] In the above-described saddle-ride type vehicle, it is preferable that the saddle-ride type vehicle further includes a movement mechanism that changes the direction in which the exhaust gas is ejected from the right exhaust port and the direction in which the exhaust gas is ejected from the left exhaust port, and a movement mechanism control unit that controls the movement mechanism based on the detection result of the inclination angle detection unit.

[0035] (Operation and Effect) In this case, it is easy to change the direction of exhaust gas ejection from the right exhaust port depending on the tilt angle of the saddle-riding type vehicle. Also, it is easy to change the direction of exhaust gas ejection from the left exhaust port depending on the tilt angle of the saddle-riding type vehicle. Therefore, when the saddle-riding type vehicle turns on a curved road, it is easy for the first force to offset at least a portion of the centrifugal force.

[0036] In the above-described straddle-type vehicle, it is preferable that the movement mechanism rotates the exhaust device.

[0037] (Operation and Effect) In this case, it is easy to change the direction of exhaust gas ejection from the right exhaust port. It is also easy to change the direction of exhaust gas ejection from the left exhaust port. Therefore, when the saddle-type vehicle turns on a curved road, it is easy for the first force to offset at least a portion of the centrifugal force.

[0038] In the above-described straddle-type vehicle, the straddle-type vehicle preferably includes a first valve that opens and closes the first exhaust port.

[0039] (Operation and Effect) In this case, it is easy to control the injection of exhaust gas from the first exhaust port.

[0040] In the above-described saddle-riding type vehicle, it is preferable that the saddle-riding type vehicle includes a tilt angle detection unit that detects the tilt angle of the saddle-riding type vehicle to the right and left, and a first valve control unit that controls the first valve based on the detection result of the tilt angle detection unit.

[0041] (Operation and Effect) In this case, it is easy to control the injection of exhaust gas from the first exhaust port in accordance with the tilt angle of the saddle-ride type vehicle.

[0042] In the above-described saddle-ride type vehicle, it is preferable that when the tilt angle of the saddle-ride type vehicle part to the right is equal to or greater than a first threshold value, the first valve control unit opens the first exhaust port by the first valve, and when the tilt angle of the saddle-ride type vehicle part to the left is equal to or greater than a second threshold value, the first valve control unit opens the first exhaust port by the first valve.

[0043] (Actions and Effects) In this case, if the lean angle of the saddle riding type vehicle to the right is equal to or greater than a first threshold value, the saddle riding type vehicle is deemed to be turning on a curved road. Also, if the lean angle of the saddle riding type vehicle to the left is equal to or greater than a second threshold value, the saddle riding type vehicle is deemed to be turning on a curved road. Therefore, when the saddle riding type vehicle turns on a curved road, the first exhaust port injects exhaust gas. Therefore, when the saddle riding type vehicle turns on a curved road, the first force can easily offset at least a portion of the centrifugal force.

[0044] In the above-described straddle-type vehicle, it is preferable that the exhaust device includes a main exhaust port that discharges the exhaust gas, and the first exhaust port is smaller than the main exhaust port.

[0045] (Operation and Effect) In this case, when the first exhaust port injects the exhaust gas, it is easy to increase the velocity of the exhaust gas, and therefore it is easy to increase the first force.

[0046] In the above-described straddle-type vehicle, it is preferable that the first exhaust port has a diameter smaller than a diameter of the main exhaust port.

[0047] (Operation and Effect) In this case, when the first exhaust port injects the exhaust gas, it is easy to increase the velocity of the exhaust gas, and therefore it is easy to increase the first force.

[0048] In the above-described straddle-type vehicle, the exhaust device preferably includes a main valve that opens and closes the main exhaust port.

[0049] (Operation and Effect) In this case, it is easy to control the injection of exhaust gas from the main exhaust port.

[0050] In the above-described straddle-type vehicle, it is preferable that the main valve is configured to close the main exhaust port when the pressure of the exhaust gas in the exhaust device is less than a predetermined value.

[0051] (Functions and Effects) Therefore, when the exhaust gas pressure in the exhaust device is below a predetermined value, the main exhaust port does not inject exhaust gas. Therefore, when the exhaust gas pressure in the exhaust device is below a predetermined value, it is easy to increase the amount of exhaust gas injected from the first exhaust port. Therefore, when the exhaust gas pressure in the exhaust device is below a predetermined value, a saddle-type vehicle with good cornering performance can be provided.

[0052] The above-described saddle-ride type vehicle preferably includes a tilt angle detection unit that detects the tilt angle of the saddle-ride type vehicle to the right and left, and a main valve control unit that controls the main valve based on the detection result of the tilt angle detection unit.

[0053] (Operation and Effect) In this case, it is easy to control the injection of exhaust gas from the main exhaust port in accordance with the tilt angle of the saddle-ride type vehicle.

[0054] In the above-described saddle-riding vehicle, when the tilt angle of the saddle-riding vehicle to the left is equal to or greater than a first threshold value, and when the tilt angle of the saddle-riding vehicle to the right is equal to or greater than a second threshold value, it is preferable that the main valve control unit closes the main exhaust port using the main valve.

[0055] (Actions and Effects) In this case, if the lean angle of the saddle riding type vehicle to the left is equal to or greater than the first threshold value, and if the lean angle of the saddle riding type vehicle to the right is equal to or greater than the second threshold value, the saddle riding type vehicle is deemed to be turning a curved road. Therefore, when the saddle riding type vehicle turns a curved road, the main exhaust port does not inject exhaust gas. Therefore, when the saddle riding type vehicle turns a curved road, it is easy to increase the amount of exhaust gas injected from the first exhaust port. Therefore, when the saddle riding type vehicle turns a curved road, it is easy for the first force to offset at least a portion of the centrifugal force.

[0056] In the above-mentioned saddle-type vehicle, it is preferable that the vehicle is provided with a front wheel and a rear wheel, the exhaust device is provided with a second exhaust port that injects the exhaust gas to apply a second force to the front wheel, and the second force acts in a direction that prevents the front wheel from lifting off the road surface.

[0057] (Actions and Effects) The exhaust device is equipped with a second exhaust port. The second exhaust port injects exhaust gas, causing a second force to act on the front wheel. The second force acts in a direction that prevents the front wheel from lifting off the road surface. In other words, the second force acts in a direction that presses the front wheel against the road surface. This makes it possible to prevent the front wheel from lifting off the road surface. As a result, the saddle-type vehicle is less likely to perform a wheelie when, for example, driving on a circuit. For example, even when the saddle-type vehicle suddenly accelerates when, for example, driving on a circuit, the saddle-type vehicle is less likely to perform a wheelie. As a result, the acceleration performance of the saddle-type vehicle can be easily improved when, for example, driving on a circuit. [Effects of the Invention]

[0058] According to the saddle-ride type vehicle of the present invention, it is possible to provide a saddle-ride type vehicle with good turning performance. [Brief explanation of the drawings]

[0059] [Figure 1] 1 is a left side view of a saddle-ride type vehicle according to a first embodiment. [Figure 2] 1 is a right side view of a saddle-ride type vehicle according to a first embodiment. [Figure 3]1 is a vertical cross-sectional view of an exhaust device according to a first embodiment, as seen from the side of a vehicle. [Figure 4] 1 is a vertical cross-sectional view of an exhaust device according to a first embodiment, as seen from behind a vehicle. [Figure 5] 1 is a vertical cross-sectional view of an exhaust device according to a first embodiment, as seen from the side of a vehicle. [Figure 6] 1 is a vertical cross-sectional view of an exhaust device according to a first embodiment, as seen from the side of a vehicle. [Figure 7] 1 is a functional block diagram showing a control system of a saddle-ride type vehicle according to a first embodiment. [Figure 8] 8A and 8B are rear views of the saddle riding type vehicle according to Example 1. Fig. 8A shows a state in which the vehicle is traveling on a straight road, Fig. 8B shows a state in which the vehicle is turning left on a curved road, and Fig. 8C shows a state in which the vehicle is turning right on a curved road. [Figure 9] FIG. 2 is a right side view showing a jet of exhaust gas according to the first embodiment. [Figure 10] 1 is a plan view showing a state in which a saddle-ride type vehicle according to a first embodiment travels on a straight road. [Figure 11] FIG. 2 is a rear view showing a jet of exhaust gas according to the first embodiment. [Figure 12] FIG. 4 is a rear view showing a reaction force and a first component force of exhaust gas according to the first embodiment. [Figure 13] 1 is a plan view showing a state in which the saddle-ride type vehicle according to the first embodiment turns left on a curved road. [Figure 14] FIG. 2 is a rear view showing a jet of exhaust gas according to the first embodiment. [Figure 15] FIG. 4 is a rear view showing a reaction force and a first component force of exhaust gas according to the first embodiment. [Figure 16] 1 is a plan view showing a state in which the saddle-ride type vehicle according to the first embodiment turns right on a curved road. [Figure 17] FIG. 10 is a perspective view of an exhaust device according to a second embodiment. [Figure 18] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a second embodiment, as seen from the rear of a vehicle. [Figure 19] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a second embodiment, as seen from the side of a vehicle. [Figure 20] FIG. 10 is a functional block diagram showing a control system of a saddle-ride type vehicle according to a second embodiment. [Figure 21] 21A and 21B are rear views of a saddle-type vehicle according to Example 2. Fig. 21A shows a state in which the vehicle is traveling on a straight road, Fig. 21B shows a state in which the vehicle is turning left on a curved road, and Fig. 21C shows a state in which the vehicle is turning right on a curved road. [Figure 22] FIG. 10 is a rear view showing the jet of exhaust gas according to the second embodiment. [Figure 23] FIG. 10 is a rear view showing the reaction force and the first component force of the exhaust gas according to the second embodiment. [Figure 24] FIG. 10 is a rear view showing the jet of exhaust gas according to the second embodiment. [Figure 25] FIG. 10 is a rear view showing the reaction force and the first component force of the exhaust gas according to the second embodiment. [Figure 26] FIG. 10 is a perspective view of an exhaust device according to a third embodiment. [Figure 27] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a third embodiment, as seen from the rear of a vehicle. [Figure 28] 28(a) and 28(b) are rear views of a saddle-type vehicle according to Example 3. Fig. 28(a) shows a state in which the vehicle is traveling on a straight road, Fig. 28(b) shows a state in which the vehicle is turning left on a curved road, and Fig. 28(c) shows a state in which the vehicle is turning right on a curved road. [Figure 29] FIG. 10 is a rear view showing the jet of exhaust gas according to the third embodiment. [Figure 30] FIG. 11 is a rear view showing the reaction force and the first component force of the exhaust gas according to the third embodiment. [Figure 31] FIG. 10 is a rear view showing the jet of exhaust gas according to the third embodiment. [Figure 32] FIG. 11 is a rear view showing the reaction force and the first component force of the exhaust gas according to the third embodiment. [Figure 33] FIG. 10 is a perspective view of an exhaust device according to a fourth embodiment. [Figure 34] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a fourth embodiment, as seen from the rear of a vehicle. [Figure 35] FIG. 10 is a functional block diagram showing a control system of a saddle-ride type vehicle according to a fourth embodiment. [Figure 36]FIG. 10 is a rear view showing the jet of exhaust gas according to the fourth embodiment. [Figure 37] FIG. 10 is a rear view showing the reaction force and the first component force of the exhaust gas according to the fourth embodiment. [Figure 38] FIG. 10 is a rear view showing the jet of exhaust gas according to the fourth embodiment. [Figure 39] FIG. 10 is a rear view showing the reaction force and the first component force of the exhaust gas according to the fourth embodiment. [Figure 40] FIG. 10 is a right side view showing a jet of exhaust gas according to the fifth embodiment. [Figure 41] FIG. 10 is a perspective view of an exhaust device according to a fifth embodiment. [Figure 42] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a fifth embodiment, as seen from the side of a vehicle. [Figure 43] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a fifth embodiment, as seen from the rear of a vehicle. [Figure 44] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a fifth embodiment, as seen from the side of a vehicle. [Figure 45] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a fifth embodiment, as seen from the side of a vehicle. [Figure 46] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a fifth embodiment, as seen from the side of a vehicle. [Figure 47] FIG. 10 is a functional block diagram showing a control system of a saddle-ride type vehicle according to a fifth embodiment. [Figure 48] FIG. 10 is a rear view showing the jet of exhaust gas according to the fourth embodiment. [Figure 49] FIG. 10 is a right side view showing a jet of exhaust gas according to the fifth embodiment. [Figure 50] FIG. 10 is a right side view showing a reaction force and a first component force of exhaust gas according to a fifth embodiment. [Figure 51] FIG. 10 is a right side view showing the reaction force of exhaust gas and the first moment according to the fifth embodiment. [Figure 52] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a modified embodiment, as seen from the rear of a vehicle. [Figure 53] FIG. 10 is a rear view showing the jet of exhaust gas and the reaction force of the exhaust gas according to the modified embodiment. [Figure 54]FIG. 10 is a rear view showing the jet of exhaust gas and the reaction force of the exhaust gas according to the modified embodiment. [Figure 55] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a modified embodiment, as seen from the side of a vehicle. [Figure 56] FIG. 10 is a perspective view of an exhaust device according to a modified embodiment. [Figure 57] FIG. 10 is a vertical cross-sectional view of an exhaust device according to a modified embodiment, as seen from the rear of a vehicle. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0060] A saddle-ride type vehicle 1 according to a first embodiment of the present invention will be described with reference to the drawings.

[0061] <Outline of saddle-type vehicle configuration>

[0062] Fig. 1 is a left side view of a saddle-ride type vehicle 1 according to the first embodiment, and Fig. 2 is a right side view of the saddle-ride type vehicle 1 according to the first embodiment.

[0063] The saddle-type vehicle 1 is a street-type vehicle. A driver (also called a rider) rides on the saddle-type vehicle 1 and operates the saddle-type vehicle 1.

[0064] The saddle-riding vehicle 1 travels. As an example, the saddle-riding vehicle 1 moves straight. When the saddle-riding vehicle 1 moves straight, the saddle-riding vehicle 1 is in an upright position. As an example, the saddle-riding vehicle 1 turns. When the saddle-riding vehicle 1 turns, the saddle-riding vehicle 1 is in a leaning position. When the saddle-riding vehicle 1 turns, the saddle-riding vehicle 1 leans to the right and to the left.

[0065] 1 and 2 show the front-rear direction X, width direction Y, and up-down direction Z of the saddle riding type vehicle 1. The front-rear direction X, width direction Y, and up-down direction Z are defined relative to a driver riding on the saddle riding type vehicle 1. The front-rear direction X, width direction Y, and up-down direction Z are perpendicular to each other.

[0066] The terms "front," "rear," "up," "down," "right," and "left" respectively refer to the "front," "rear," "up," "down," "right," and "left" of a driver riding in the saddle-riding vehicle 1. Unless otherwise specified in this specification, "front" and "rear" include not only directions parallel to the fore-and-aft direction X but also directions close to the fore-and-aft direction X. A direction close to the fore-and-aft direction X is, for example, a direction that forms an angle of 45 degrees or less with the fore-and-aft direction X. Similarly, unless otherwise specified, "right" and "left" include not only directions parallel to the width direction Y but also directions close to the width direction Y. Unless otherwise specified, "up" and "down" include not only directions parallel to the up-down direction Z but also directions close to the up-down direction Z. In each drawing, the terms "front," "rear," "up," "down," "right," and "left" are indicated as appropriate for reference.

[0067] In this specification, the expressions used to describe the arrangement have the following meanings: In the following description, the width direction Y is taken as an example, but the same applies to the front-rear direction X and the up-down direction Z.

[0068] The expression "member Ma is disposed to the right / left of member Mb" specifies the position of member Ma relative to member Mb in the width direction Y, but does not specify the position of member Ma relative to member Mb in the front-rear direction X or the up-down direction Z. In this expression, member Ma may or may not overlap member Mb in a side view of saddle riding type vehicle 1.

[0069] The expression "member Ma is disposed to the right / left of member Mb" without any reference to the viewing direction defines the position of member Ma relative to member Mb in the width direction Y, the position of member Ma relative to member Mb in the front-rear direction X, and the position of member Ma relative to member Mb in the up-down direction Z. This expression means that member Ma is disposed to the right / left of member Mb, and that at least a portion of member Ma overlaps with at least a portion of member Mb in a side view of saddle riding type vehicle 1.

[0070] The expression "member Ma is disposed to the right / left of member Mb in a plan view of the saddle riding type vehicle 1" specifies the position of member Ma relative to member Mb in the width direction Y and the position of member Ma relative to member Mb in the front-rear direction X, but does not specify the position of member Ma relative to member Mb in the up-down direction Z. This expression means that member Ma is disposed to the right / left of member Mb, the front end of member Ma is located forward of the rear end of member Mb, and the rear end of member Ma is located rearward of the front end of member Mb.

[0071] The expression "member Ma is disposed to the right / left of member Mb in a front view of the saddle riding type vehicle 1" specifies the position of member Ma relative to member Mb in the width direction Y and the position of member Ma relative to member Mb in the up-down direction Z, but does not specify the position of member Ma relative to member Mb in the front-to-rear direction X. This expression means that member Ma is disposed to the right / left of member Mb, the upper end of member Ma is located above the lower end of member Mb, and the lower end of member Ma is located below the upper end of member Mb.

[0072] In this specification, "in a side view of the saddle riding type vehicle 1" will be referred to as "in a side view of the vehicle" where appropriate. Similarly, "in a plan view of the saddle riding type vehicle 1" will be referred to as "in a plan view of the vehicle" where appropriate. Similarly, "in a rear view of the saddle riding type vehicle 1" will be referred to as "in a rear view of the vehicle" where appropriate.

[0073] The saddle-riding type vehicle 1 includes a body frame 3. The body frame 3 includes a head pipe 5 and a main frame 7. The head pipe 5 is disposed at the front of the saddle-riding type vehicle 1. The main frame 7 extends rearward and downward from the head pipe 5 in a side view of the vehicle.

[0074] The saddle-ride type vehicle 1 includes a steering device 9. The steering device 9 is supported by the body frame 3. Specifically, the steering device 9 is supported by the head pipe 5. The steering device 9 is rotatable relative to the body frame 3.

[0075] The steering device 9 includes a top bridge 11, a bottom bridge 13, and a front fork 14. The top bridge 11 is disposed above the head pipe 5. The bottom bridge 13 is disposed below the top bridge 11. The bottom bridge 13 is disposed below the head pipe 5. The front fork 14 is supported by the top bridge 11 and the bottom bridge 13. The front fork 14 extends forward and downward from the top bridge 11 in a side view of the vehicle. The front fork 14 extends to a position lower than the bottom bridge 13.

[0076] The steering device 9 includes a handlebar 15. The handlebar 15 is supported by the top bridge 11. The entire handlebar 15 is, for example, disposed above the top bridge 11. A rider holds the handlebar 15 to steer the steering device 9.

[0077] The handlebars 15 are provided with a clutch lever 17. The clutch lever 17 controls the transmission of driving force. The clutch lever 17 is operated by the rider to control the transmission of driving force. The handlebars 16 are provided with a brake lever 19. The brake lever 19 controls the braking of the front wheel. The brake lever 19 is operated by the rider to decelerate the saddle-type vehicle 1.

[0078] The handlebar 15 includes an accelerator grip 21. The accelerator grip 21 is also called a throttle. The accelerator grip 21 is operated by the driver to accelerate the saddle riding type vehicle 1.

[0079] The steering device 9 includes a front axle 23. The front axle 23 is disposed below the bottom bridge 13. The front axle 23 is supported by the front fork 14.

[0080] The saddle-type vehicle 1 includes a front wheel 24. The front wheel 24 is supported by a steering device 9. Specifically, the front wheel 24 is supported by a front axle 23. The front wheel 24 is rotatable around the front axle 23.

[0081] The saddle-riding type vehicle 1 is equipped with a front wheel braking device 25. The front wheel braking device 25 applies a braking force sufficient to stop the rotation of the front wheel 24. In the saddle-riding type vehicle 1 according to the first embodiment, a configuration in which the front wheel braking device 25 is disposed on both the right and left sides of the front wheel 24 is shown as an example. The front wheel braking device 25 may be disposed on only one of the right and left sides of the front wheel 24.

[0082] The saddle-riding type vehicle 1 includes an engine 31. The engine 31 is supported by the body frame 3. Specifically, the engine 31 is supported by the main frame 5. The engine 31 is fixed to the body frame 3. The engine 31 does not swing relative to the body frame 3. The engine 31 generates driving force for propelling the saddle-riding type vehicle 1. At least a portion of the engine 31 is disposed below the main frame 7 in a side view of the vehicle. The engine 31 is disposed behind the steering device 9 in a side view of the vehicle.

[0083] The engine 31 is equipped with a crankshaft 33 and a transmission 35. The crankshaft 33 outputs driving force. The transmission 35 performs deceleration. The transmission 35 reduces the rotation speed of the crankshaft 33 by reducing the speed in multiple stages. The transmission 35 can switch between multiple gear ratios. The driving force changed by the transmission 35 is transmitted to a drive shaft (not shown). The engine 31 is equipped with a shift pedal 37. The shift pedal 37 is operated by the driver's left foot. The shift pedal 37 operates the gear ratio of the transmission 35.

[0084] The engine 31 is an internal combustion engine. The engine 31 has a combustion chamber (not shown). The engine 31 burns fuel in the combustion chamber. Exhaust gas is generated in the combustion chamber.

[0085] The saddle-type vehicle 1 is equipped with an exhaust device 29. The exhaust device 29 is supported by the body frame 3. The exhaust device 29 discharges exhaust gas. The exhaust device 29 discharges exhaust gas generated in the engine 31. The exhaust device 29 transports exhaust gas from the engine 31. The exhaust device 29 is connected to the engine 31. The exhaust device 29 may be configured to be directly connected to the engine 31, or may be configured to be indirectly connected to the engine 31. As an example, the exhaust device 29 is connected to the engine 31 via a connecting pipe (not shown). Exhaust gas generated in the combustion chamber of the engine 31 is guided to the exhaust device 29 via the connecting pipe.

[0086] The straddle-type vehicle 1 includes a fuel tank 39. The fuel tank 39 is supported by the body frame 3. Specifically, the fuel tank 39 is supported by the main frame 5. The fuel tank 39 stores fuel.

[0087] The saddle-type vehicle 1 includes a seat 41. The seat 41 is supported by the body frame 3. A driver sits astride the seat 41 and drives the saddle-type vehicle 1.

[0088] The saddle-ride type vehicle 1 includes a pivot shaft 43, a swing arm 45, and a rear axle 47. The pivot shaft 43 is supported by the body frame 3. Specifically, the pivot shaft 43 is supported by the main frame 5. The swing arm 45 is supported by the pivot shaft 43. The swing arm 45 is swingable around the pivot shaft 43 relative to the body frame 3. The swing arm 45 extends rearward from the pivot shaft 43 in a side view of the vehicle. The rear axle 47 is supported at the rear of the swing arm 45.

[0089] The saddle-type vehicle 1 includes a rear wheel 49. The rear wheel 49 is supported by a rear axle 47. The rear wheel 49 is rotatable around the rear axle 47. The swing arm 45 and the rear wheel 49 are disposed behind the engine 31 in a side view of the vehicle. The swing arm 45 and the rear wheel 49 are disposed below the fuel tank 39 and the seat 41.

[0090] The straddle-type vehicle 1 is provided with a rear wheel braking device 51. The rear wheel braking device 51 applies a braking force sufficient to stop the rotation of the rear wheel 49.

[0091] The saddle-riding type vehicle 1 is provided with a brake pedal 53. The brake pedal 53 is operated by the driver's right foot. The brake pedal 53 operates the rear wheel braking device 51. The brake pedal 53 is operated by the driver to decelerate the saddle-riding type vehicle 1.

[0092] The straddle-type vehicle 1 is provided with an accelerator opening sensor 61. The accelerator opening sensor 61 detects the opening of the accelerator grip 21.

[0093] A fuel supply device 63 is disposed behind the engine 31 in the front-rear direction X. The fuel supply device 63 supplies fuel in the fuel tank 39 to the engine 31.

[0094] The straddle-type vehicle 1 is provided with a throttle valve opening sensor 65. The throttle valve opening sensor 65 detects the opening of a throttle valve that adjusts the amount of intake air into the engine 31.

[0095] The engine 31 is provided with a gear position sensor 67 that detects the gear position of the transmission 35. The gear position sensor 67 detects information related to the gear ratio of the transmission 35. The engine 31 is provided with a crankshaft position sensor 69. The crankshaft position sensor 69 detects the angle of the crankshaft 33 and the rotation speed of the engine 31. The crankshaft position sensor 69 detects the phase of the crankshaft 33.

[0096] The saddle-riding type vehicle 1 is provided with an ECU 75 (Electronic Control Unit) at the center in the fore-and-aft direction X. The ECU 75 communicates with various sensors such as an IMU 81 (described later) and other control units via a communication network (not shown). The ECU 75 controls the entire saddle-riding type vehicle 1, including the engine 31, while transmitting and receiving data via this intercommunication.

[0097] <Exhaust system configuration> The configuration of the exhaust device 29 will be described.

[0098] As an example, the exhaust device 29 is fixed to the body frame 3. The exhaust device 29 is immovable relative to the body frame 3. The exhaust device 29 is immovable relative to the body frame 3.

[0099] Fig. 3 is a vertical cross-sectional view of the exhaust device 29 as seen from the side of the vehicle. Fig. 4 is a cross-sectional view taken along the line AA in Fig. 3. In other words, Fig. 4 is a vertical cross-sectional view of the exhaust device 29 as seen from the rear of the vehicle.

[0100] The exhaust device 29 includes a junction pipe 55, a first branch pipe 56, and a second branch pipe 57. The first branch pipe 56 is connected to the junction pipe 55. The second branch pipe 57 is connected to the junction pipe 55. The junction pipe 55 branches into the first branch pipe 56 and the second branch pipe 57.

[0101] The junction pipe 55 has a guide port 59 at one end. The guide port 59 is connected to the engine 31 via a connecting pipe. That is, exhaust gas generated in the engine 31 is guided to the exhaust device 29 through the guide port 59.

[0102] The other end of the junction pipe 55 is provided with a branch portion 60. The branch portion 60 is connected to one end of the first branch pipe 56 and one end of the second branch pipe 57. In other words, the exhaust device 29 has a structure in which the junction pipe 55 branches into the first branch pipe 56 and the second branch pipe 57 at the branch portion 60.

[0103] The junction pipe 55 extends in the front-rear direction X. The branching portion 60 is disposed rearward of the guide port 59 in a side view of the vehicle.

[0104] The first branch pipe 56 extends in the front-rear direction X. That is, the extending direction of the first branch pipe 56 is the same as the extending direction of the junction pipe 55. The first branch pipe 56 extends rearward from the branching portion 60 in a side view of the vehicle.

[0105] The second branch pipe 57 extends in the up-down direction Z. The second branch pipe 57 extends downward from the branching portion 60 in a side view of the vehicle. The second branch pipe 57 extends downward from the branching portion 60 in a rear view of the vehicle.

[0106] The exhaust device 29 includes an exhaust port 71. The exhaust port 71 injects exhaust gas. The exhaust port 71 injects exhaust gas from the inside of the exhaust device 29 to the outside of the exhaust device 29. In other words, the exhaust port 71 injects exhaust gas from the exhaust device 29 to the outside of the saddle-riding type vehicle 1.

[0107] The exhaust port 71 is configured to discharge exhaust gas rearward in a side view of the vehicle.

[0108] For example, the exhaust port 71 injects exhaust gas rearward in the front-rear direction X.

[0109] As an example, the exhaust port 71 is provided at the other end of the first branch pipe 56 .

[0110] The exhaust port 71 is an example of a main exhaust port according to the present invention.

[0111] The exhaust device 29 includes an exhaust port 73. The exhaust port 73 injects exhaust gas. The exhaust port 73 injects exhaust gas from the inside of the exhaust device 29 to the outside of the exhaust device 29. In other words, the exhaust port 73 injects exhaust gas from the exhaust device 29 to the outside of the saddle-riding type vehicle 1.

[0112] 4 shows the injection direction Rc, which is the direction in which exhaust gas is injected from the exhaust port 73. The exhaust port 73 is positioned so that the injection direction Rc is downward when the saddle riding type vehicle 1 is in an upright position.

[0113] The injection direction Rc is different from the injection direction of the exhaust gas from the exhaust port 71 .

[0114] For example, the jetting direction Rc is downward in the vertical direction Z. For example, the angle between the jetting direction Rc and the vertical direction Z is 0 degrees.

[0115] For example, the spray direction Rc is constant relative to the body frame 3. The spray direction Rc cannot be changed relative to the body frame 3.

[0116] For example, the angle between the jetting direction Rc and the vertical direction Z is constant. The angle between the jetting direction Rc and the vertical direction Z cannot be changed. It doesn't change.

[0117] For example, the exhaust port 73 injects exhaust gas downward in the vertical direction Z.

[0118] For example, the exhaust port 73 is provided at the other end of the second branch pipe 57 .

[0119] For example, the second branch pipe 57 extends from the branch portion 60 in the injection direction Rc.

[0120] The diameter of the second branch pipe 57 is configured to be smaller than the diameter of the first branch pipe 56 .

[0121] The exhaust port 73 is smaller than the exhaust port 71 of the first branch pipe 56 .

[0122] For example, the exhaust port 71 has a circular shape. The exhaust port 73 has a circular shape. The exhaust port 73 has a diameter smaller than the diameter of the exhaust port 71.

[0123] The exhaust port 73 is an example of a first exhaust port according to the present invention.

[0124] The exhaust device 29 includes an on-off valve 58. The on-off valve 58 opens and closes an exhaust port 71. The on-off valve 58 further opens and closes an exhaust port 73.

[0125] The on-off valve 58 is an example of a main valve in the present invention. The on-off valve 58 is also an example of a first valve in the present invention.

[0126] For example, the on-off valve 58 is provided in the branch section 60. The on-off valve 58 selectively closes the first branch pipe 56 and the second branch pipe 57. When the on-off valve 58 opens the exhaust port 71, the on-off valve 58 closes the exhaust port 73. When the on-off valve 58 opens the exhaust port 73, the on-off valve 58 closes the exhaust port 71. The on-off valve 58 can discharge exhaust gas from only one of the exhaust port 71 and the exhaust port 73. The on-off valve 58 is also called a three-way valve.

[0127] The on-off valve 58 switches the exhaust device 29 between a rearward injection state and a sideward injection state. When the exhaust device 29 is in the rearward injection state, the exhaust device 29 injects exhaust gas from an exhaust port 71. When the exhaust device 29 is in the sideward injection state, the exhaust device 29 injects exhaust gas from an exhaust port 73.

[0128] When exhaust system 29 is in the rearward injection state, exhaust system 29 preferably does not inject exhaust gases from exhaust port 73 .

[0129] When the exhaust device 29 is in the side injection state, it is preferable that the exhaust device 29 does not inject exhaust gas from the exhaust port 71 .

[0130] 5 shows the exhaust device 29 in a lateral injection state. The on-off valve 58 closes the exhaust port 71. That is, the on-off valve 58 isolates the exhaust port 71 from the junction pipe 55. For example, the on-off valve 58 closes one end of the first branch pipe 56. The on-off valve 58 opens the exhaust port 73. That is, the on-off valve 58 connects the exhaust port 73 to the junction pipe 55. For example, the on-off valve 58 opens one end of the second branch pipe 57.

[0131] 5 shows a schematic diagram of the flow R1 of exhaust gas in the lateral injection state. The exhaust device 29 injects exhaust gas from the exhaust port 73. The exhaust device 29 injects the exhaust gas downward in the vertical direction Z.

[0132] The exhaust device 29 injects exhaust gas only from the exhaust port 73. The exhaust device 29 does not inject exhaust gas from the exhaust port 71.

[0133] Specifically, exhaust gas enters the exhaust device 29 from the engine 31 through the guide port 59. The exhaust gas flows through the junction pipe 55. The exhaust gas flows from the guide port 59 to the branching section 60. The exhaust gas flows from the junction pipe 55 to the second branching pipe 57. The exhaust gas flows from the branching section 60 to the exhaust port 73. The exhaust gas is discharged from the exhaust port 73 to the outside of the saddle-riding type vehicle 1.

[0134] 6 shows the exhaust device 29 in the rear injection state. The on-off valve 58 opens the exhaust port 71. That is, the on-off valve 58 connects the exhaust port 71 to the junction pipe 55. For example, the on-off valve 58 opens one end of the first branch pipe 56. The on-off valve 58 closes the exhaust port 73. That is, the on-off valve 58 isolates the exhaust port 73 from the junction pipe 55. For example, the on-off valve 58 closes one end of the second branch pipe 57.

[0135] 6 shows a schematic diagram of the flow R2 of exhaust gas in the rearward injection state. The exhaust device 29 injects exhaust gas from an exhaust port 71. The exhaust device 29 injects the exhaust gas rearward in the front-rear direction X.

[0136] The exhaust device 29 injects exhaust gas only from the exhaust port 71. The exhaust device 29 does not inject exhaust gas from the exhaust port 73.

[0137] Specifically, exhaust gas enters the exhaust device 29 from the engine 31 through the guide port 59. The exhaust gas flows through the junction pipe 55. The exhaust gas flows from the guide port 59 to the branching section 60. The exhaust gas flows from the junction pipe 55 to the first branching pipe 56. The exhaust gas flows from the branching section 60 to the exhaust port 71. The exhaust gas is discharged from the exhaust port 71 to the outside of the saddle-riding type vehicle 1.

[0138] The on-off valve 58 is, for example, an electrically operated valve.

[0139] <Control system configuration> The control system of the saddle riding type vehicle 1 according to the first embodiment will be described.

[0140] FIG. 7 is a functional block diagram illustrating a control system of the saddle-ride type vehicle 1 according to the first embodiment.

[0141] The saddle riding type vehicle 1 is equipped with a stroke sensor 64, a speed sensor 66, an acceleration sensor 68, and a pressure sensor 70. The stroke sensor 64 detects the stroke amount of the front fork 14. In other words, the stroke sensor 64 detects the extension / contraction amount of the front fork 14. The speed sensor 66 detects the speed of the saddle riding type vehicle 1. The acceleration sensor 68 detects the acceleration of the saddle riding type vehicle 1. The pressure sensor 70 detects the pressure of exhaust gas inside the exhaust device 29.

[0142] Information detected by various sensors such as the accelerator opening sensor 61, stroke sensor 64, throttle valve opening sensor 65, speed sensor 66, acceleration sensor 68, crankshaft position sensor 69, and pressure sensor 70 is configured to be transmitted to the ECU 75.

[0143] The saddle-riding type vehicle 1 is equipped with an IMU 81. The IMU 81 is also called an inertial measurement unit. The IMU 81 detects the lean angle of the saddle-riding type vehicle 1 to the right and left. When the saddle-riding type vehicle 1 travels, the IMU 81 continuously detects the lean angle of the saddle-riding type vehicle 1. The lean angle of the saddle-riding type vehicle 1 is, for example, a roll angle. The lean angle of the saddle-riding type vehicle 1 is, for example, the angle of the saddle-riding type vehicle 1 around an axis in the front-rear direction X.

[0144] The IMU 81 is an example of the tilt angle detection unit of the present invention.

[0145] The tilt angle will be explained. 8(a), 8(b), and 8(c) are rear views of the saddle riding type vehicle 1. The saddle riding type vehicle 1 is positioned on a road surface G. The rear wheel 49 is in contact with the road surface G.

[0146] In Figure 8(a), the saddle riding type vehicle 1 is in an upright position. In Figures 8(b) and 8(c), the saddle riding type vehicle 1 is in a tilted position. The tilt angle when the saddle riding type vehicle 1 is in a tilted position is larger than the tilt angle when the saddle riding type vehicle 1 is in an upright position.

[0147] In FIG. 8(b), the saddle riding type vehicle 1 leans to the left.

[0148] FIG. 8(b) shows the tilt angle V1. The tilt angle V1 is the angle between the up-down direction Z and the vertical direction W. The vertical direction W is defined by, for example, gravity. Gravity acts in the vertical direction W. The tilt angle V1 is an example of the tilt angle of the saddle riding type vehicle 1 to the left.

[0149] In FIG. 8(c), the saddle riding type vehicle 1 is tilted to the right.

[0150] FIG. 8(c) shows the inclination angle V2. The inclination angle V2 is the angle between the up-down direction Z and the vertical direction W. The inclination angle V2 is an example of the inclination angle of the saddle riding type vehicle 1 to the right.

[0151] When the saddle-riding type vehicle 1 is in an upright position, the up-down direction Z is substantially parallel to the vertical direction W. When the saddle-riding type vehicle 1 is in an upright position, the tilt angle V1 is substantially 0 degrees. When the saddle-riding type vehicle 1 is in an upright position, the tilt angle V2 is substantially 0 degrees.

[0152] When the saddle riding type vehicle 1 leans leftward from an upright position, the lean angle V1 increases from 0 degrees. When the saddle riding type vehicle 1 leans rightward from an upright position, the lean angle V2 increases from 0 degrees.

[0153] When the saddle riding type vehicle 1 tilts from an upright position, the up-down direction Z changes relative to the vertical direction W.

[0154] When the saddle riding type vehicle 1 tilts from an upright position, the jetting direction Rc also changes with respect to the vertical direction W. The jetting direction Rc changes according to the tilt angles V1 and V2.

[0155] 8(a), 8(b), and 8(c) show the horizontal direction S. The horizontal direction S is perpendicular to the vertical direction W. The horizontal direction S is perpendicular to the front-to-rear direction X. The horizontal direction S is horizontal. When the saddle-riding type vehicle 1 is in an upright position, the width direction Y is substantially parallel to the horizontal direction S. When the saddle-riding type vehicle 1 leans to the right or left, the width direction Y deviates from the horizontal direction S.

[0156] The vertical direction W has a first vertical direction W1 and a second vertical direction W2. The second vertical direction W2 is opposite to the first vertical direction W1. When the saddle riding type vehicle 1B is in an upright position, the first vertical direction W1 faces upward. When the saddle riding type vehicle 1B is in an upright position, the second vertical direction W2 faces downward.

[0157] The term "upper" includes the first vertical direction W1, and the term "lower" includes the second vertical direction W2.

[0158] The horizontal direction S has a first horizontal direction S1 and a second horizontal direction S2. The second horizontal direction S2 is opposite to the first horizontal direction S1. When the saddle riding type vehicle 1B is in an upright position, the first horizontal direction S1 faces to the right. When the saddle riding type vehicle 1B is in an upright position, the second vertical direction W2 faces to the left.

[0159] The first horizontal direction S1 has the same meaning as "left and horizontal." The second horizontal direction S2 has the same meaning as "right and horizontal."

[0160] The term "left" includes the first horizontal direction S1, and the term "right" includes the second horizontal direction S2.

[0161] See Figure 7. The IMU 81 may further detect three-dimensional inertial motion of the saddle riding type vehicle 1 (translational motion and rotational motion in three orthogonal axial directions). The IMU 81 may detect the attitude of the saddle riding type vehicle 1. The IMU 81 may detect the angle of the saddle riding type vehicle 1 around the width direction Y (called the pitch angle). The IMU 81 may detect the angle of the saddle riding type vehicle 1 around the up-down direction Z (called the yaw angle).

[0162] The information detected by the IMU 81 is transmitted to the ECU 75 .

[0163] The ECU 75 controls the on-off valve 58 based on the detection result of the IMU 81. The ECU 75 switches the exhaust device 29 between a rear injection state and a side injection state based on the inclination angles V1 and V2.

[0164] The ECU 75 is an example of a main valve control unit in the present invention. The ECU 75 is also an example of a first valve control unit in the present invention.

[0165] The ECU 75 includes a CPU 77. The CPU 77 is a so-called central processing unit, and executes various programs to realize various functions.

[0166] The ECU 75 includes a storage unit 79. The storage unit 79 stores programs and data related to the operation of the saddle riding type vehicle 1. An example of a program stored in the storage unit 79 is a control program executed by the ECU 75. The storage unit 79 may be rewritable. Various types of information stored in the storage unit 79 are read out by the ECU 75 as appropriate.

[0167] For example, the storage unit 79 stores predetermined values ​​L1 and L2. The predetermined value L1 is a threshold value for the tilt angle V1. The predetermined value L2 is a threshold value for the tilt angle V2.

[0168] The predetermined value L1 and the predetermined value L2 are values ​​that are set in advance. For example, the predetermined value L1 and the predetermined value L2 are set according to various conditions of the saddle riding type vehicle 1. The predetermined value L1 and the predetermined value L2 may be set by the driver using an input unit (not shown).

[0169] When the saddle-riding type vehicle 1 is in an upright position, the inclination angle V1 is less than a predetermined value L1, and the inclination angle V2 is less than a predetermined value L2. When the inclination angle V1 is less than the predetermined value L1, and the inclination angle V2 is less than the predetermined value L2, the saddle-riding type vehicle 1 is considered to be in an upright position.

[0170] When the saddle-riding vehicle 1 leans to the left, the inclination angle V1 is equal to or greater than a predetermined value L1. When the inclination angle V1 is equal to or greater than the predetermined value L1, the saddle-riding vehicle 1 is deemed to be leaning to the left. When the saddle-riding vehicle 1 leans to the right, the inclination angle V2 is equal to or greater than a predetermined value L2. When the inclination angle V2 is equal to or greater than the predetermined value L2, the saddle-riding vehicle 1 is deemed to be leaning to the right.

[0171] The predetermined value L1 is, for example, 10 degrees or more. The predetermined value L1 is, for example, 20 degrees or more. The predetermined value L1 is, for example, 30 degrees or less.

[0172] The predetermined value L2 is, for example, 10 degrees or more. The predetermined value L2 is, for example, 20 degrees or more. The predetermined value L2 is, for example, 30 degrees or less.

[0173] The predetermined value L2 is, for example, the same as the predetermined value L1, or may be different from the predetermined value L1.

[0174] For example, the ECU 75 controls the on-off valve 58 based on the tilt angles V1 and V2 and the predetermined values ​​L1 and L2.

[0175] Specifically, when the inclination angle V1 is equal to or greater than a predetermined value L1, the ECU 75 closes the exhaust port 71 using the on-off valve 58. When the inclination angle V1 is equal to or greater than the predetermined value L1, the ECU 75 opens the exhaust port 73 using the on-off valve 58. When the inclination angle V1 is equal to or greater than the predetermined value L1, the ECU 75 switches the exhaust device 29 to a lateral injection state.

[0176] When the inclination angle V2 is equal to or greater than the predetermined value L2, the ECU 75 closes the exhaust port 71 using the on-off valve 58. When the inclination angle V2 is equal to or greater than the predetermined value L2, the ECU 75 opens the exhaust port 73 using the on-off valve 58. When the inclination angle V2 is equal to or greater than the predetermined value L2, the ECU 75 switches the exhaust device 29 to a lateral injection state.

[0177] When the inclination angle V1 is less than a predetermined value L1 and the inclination angle V2 is less than a predetermined value L2, the ECU 75 opens the exhaust port 71 using the on-off valve 58. When the inclination angle V1 is less than the predetermined value L1 and the inclination angle V2 is less than the predetermined value L2, the ECU 75 closes the exhaust port 73 using the on-off valve 58. When the inclination angle V1 is less than the predetermined value L1 and the inclination angle V2 is less than the predetermined value L2, the ECU 75 switches the exhaust device 29 to a rear injection state.

[0178] The predetermined value L1 is an example of a first threshold value of the present invention, and the predetermined value L2 is an example of a second threshold value of the present invention.

[0179] Alternatively, the storage unit 79 may store the upright condition and the tilt condition. The ECU 75 may control the on-off valve 58 based on the tilt angles V1 and V2 and the upright condition and the tilt condition. The upright condition and the tilt condition are defined by predetermined values ​​L1 and L2.

[0180] For example, the upright condition is that both a first condition and a second condition are satisfied. The first condition is that the tilt angle V1 is less than a predetermined value L1. The second condition is that the tilt angle V2 is less than a predetermined value L2. When the upright condition is satisfied, the saddle riding type vehicle 1 is considered to be in an upright position. When the upright condition is satisfied, the ECU 75 opens the exhaust port 71 by the on-off valve 58. When the upright condition is satisfied, the ECU 75 closes the exhaust port 73 by the on-off valve 58.

[0181] For example, the lean condition is that one of the third condition and the fourth condition is satisfied. The third condition is that the lean angle V1 is equal to or greater than a predetermined value L1. The fourth condition is that the lean angle V2 is equal to or greater than a predetermined value L2. When the lean condition is satisfied, the saddle riding type vehicle 1 is considered to be in a leaning posture. When the lean condition is satisfied, the ECU 75 closes the exhaust port 71 using the on-off valve 58. When the lean condition is satisfied, the ECU 75 opens the exhaust port 73 using the on-off valve 58.

[0182] <Example of Operation of the Saddle-Riding Vehicle 1 According to the First Embodiment> The following describes the operation of the saddle riding type vehicle 1 according to Example 1. The operation of the saddle riding type vehicle 1 includes the operation of the saddle riding type vehicle 1 going straight, the operation of the saddle riding type vehicle 1 turning left, and the operation of the saddle riding type vehicle 1 turning right.

[0183] <Example of saddle-type vehicle 1 moving straight> First, the operation of the saddle riding type vehicle 1 moving straight will be described.

[0184] Fig. 9 is a right side view of the saddle riding type vehicle 1. Fig. 10 is a plan view of the saddle riding type vehicle 1.

[0185] The saddle riding type vehicle 1 travels straight on a straight path St. The saddle riding type vehicle 1 moves in a traveling direction P. The traveling direction P is forward in the fore-and-aft direction X. When the saddle riding type vehicle 1 travels straight, the saddle riding type vehicle 1 takes an upright position.

[0186] The IMU 81 detects the tilt angles V1 and V2 of the saddle riding type vehicle 1. The IMU 81 outputs the tilt angles V1 and V2 to the ECU 75.

[0187] The ECU 75 acquires the inclination angles V1 and V2. The ECU 75 compares the inclination angle V1 with a predetermined value L1. The ECU 75 determines that the inclination angle V1 is less than the predetermined value L1. The ECU 75 compares the inclination angle V2 with the predetermined value L2. The ECU 75 determines that the inclination angle V2 is less than the predetermined value L2. Alternatively, the ECU 75 may determine that the upright condition is satisfied.

[0188] The ECU 75 opens the exhaust port 71 by the on-off valve 58 and closes the exhaust port 73 by the on-off valve 58 .

[0189] The exhaust device 29 is in a rearward injection state. The exhaust port 73 does not inject exhaust gas. The exhaust port 71 injects exhaust gas. The exhaust port 71 injects exhaust gas rearward. The exhaust port 71 injects exhaust gas in the direction opposite to the traveling direction P.

[0190] 9 and 10 schematically show the jet flow Hc. The jet flow Hc is formed by exhaust gas injected from the exhaust port 71. The jet flow Hc is generated at the exhaust port 71. The jet flow Hc is generated outside the exhaust device 29. The jet flow Hc is generated outside the saddle-type vehicle 1.

[0191] When the jet flow Hc is generated, a reaction force Fc of the jet flow Hc is generated. The reaction force Fc has a direction opposite to that of the jet flow Hc. The reaction force Fc acts on the exhaust device 29. The reaction force Fc acts on the saddle-ride type vehicle 1. The exhaust port 71 causes the reaction force Fc to act on the saddle-ride type vehicle 1.

[0192] For example, the jet flow Hc flows rearward from the exhaust port 71. The reaction force Fc flows forward. The reaction force Fc acts in the forward direction on the saddle riding type vehicle 1. The reaction force Fc acts in the same direction as the traveling direction P on the saddle riding type vehicle 1.

[0193] <Example of the movement of the saddle-type vehicle 1 turning left> Next, the operation of the saddle riding type vehicle 1 when turning left will be described.

[0194] Figures 11 and 12 are rear views of the saddle riding type vehicle 1. Figure 13 is a plan view of the saddle riding type vehicle 1. For ease of explanation, the exhaust device 29 is omitted from Figure 12.

[0195] When the saddle riding type vehicle 1 turns left on a curved road Cr, the centrifugal force E acts on the saddle riding type vehicle 1 in a rightward direction relative to the saddle riding type vehicle 1. For example, the centrifugal force E acts on the saddle riding type vehicle 1 in a second horizontal direction S2.

[0196] Although not shown in the figure, the curved road Cr may be defined by, for example, a center of curvature and a radius of curvature. In this case, the centrifugal force E has a direction directed from the center of curvature toward the saddle riding type vehicle 1.

[0197] Although not shown in the figures, the movement path of the saddle riding type vehicle 1 may be defined by a turning center and a turning radius. For example, the saddle riding type vehicle 1 may move on a circumference having a turning radius centered on the turning center. In this case, the centrifugal force E has a direction from the turning center toward the saddle riding type vehicle 1.

[0198] When the saddle riding type vehicle 1 turns left on a curved road Cr, the saddle riding type vehicle 1 leans left.

[0199] As the centrifugal force E increases, the tilt angle V1 increases.

[0200] As the radius of curvature becomes smaller, the centrifugal force E becomes larger. Therefore, as the radius of curvature becomes smaller, the tilt angle V1 becomes larger.

[0201] As the turning radius becomes smaller, the centrifugal force E becomes larger. Therefore, as the turning radius becomes smaller, the tilt angle V1 becomes larger.

[0202] The speed of the saddle riding type vehicle 1 when the saddle riding type vehicle 1 turns on the curved road Cr is called the "turning speed." As the turning speed increases, the centrifugal force E increases. Therefore, as the turning speed increases, the inclination angle V1 increases.

[0203] The IMU 81 detects the tilt angles V1 and V2 of the saddle-ride type vehicle 1.

[0204] The ECU 75 determines that the tilt angle V1 is equal to or greater than the predetermined value L1. Alternatively, the ECU 75 may determine that the tilt condition is satisfied. The ECU 75 closes the exhaust port 71 with the on-off valve 58 and opens the exhaust port 73 with the on-off valve 58.

[0205] The exhaust device 29 is in a lateral injection state. The exhaust port 71 does not inject exhaust gas. The exhaust port 73 injects exhaust gas. The exhaust port 73 then applies a first force to the saddle riding type vehicle 1. The first force offsets at least a portion of the centrifugal force E.

[0206] Specifically, the exhaust port 73 injects the exhaust gas downward in the up-down direction Z. The saddle riding type vehicle 1 is tilted to the left. Therefore, the exhaust port 73 injects the exhaust gas in the same direction as the direction of the centrifugal force E. That is, the exhaust port 73 injects the exhaust gas to the right. For example, the exhaust port 73 injects the exhaust gas downward and to the right. For example, the exhaust port 73 injects the exhaust gas in a direction that combines the second horizontal direction S2 and the second vertical direction W2.

[0207] 11 to 13 schematically show the jet H. The jet H is formed by exhaust gas injected from the exhaust port 73. The jet H is generated at the exhaust port 73. For example, the jet H is generated at a starting point Ce corresponding to the center of the exhaust port 73. The jet H is generated outside the exhaust device 29. The jet H is generated outside the saddle-type vehicle 1. The jet H has the same direction as the injection direction Rc.

[0208] The first force is, for example, a reaction force F of the jet H. When the jet H is generated, the reaction force F is generated. The reaction force F has a direction opposite to that of the jet H. The reaction force F has a direction opposite to the jet direction Rc. The reaction force F acts on the exhaust device 29. The reaction force F acts on the saddle-ride type vehicle 1. The exhaust port 73 causes the reaction force F to act on the saddle-ride type vehicle 1.

[0209] When the saddle-ride type vehicle 1 turns left on the curved road Cr, the jet flow H flows from the starting point Ce to the right. For example, the jet flow H flows to the right and downward. The jet flow H has a direction that is a combination of the second horizontal direction S2 and the second vertical direction W2.

[0210] The reaction force F is directed leftward from the starting point Ce. For example, the reaction force F is directed leftward and upward. The reaction force F has a direction that is a combination of the first horizontal direction S1 and the first vertical direction W1.

[0211] The reaction force F acts to the left of the saddle riding type vehicle 1. For example, the reaction force F acts to the left and upward of the saddle riding type vehicle 1. The reaction force F acts to the saddle riding type vehicle 1 in a direction that is a combination of a first horizontal direction S1 and a first vertical direction W1.

[0212] The centrifugal force E acts to the right on the saddle riding type vehicle 1. The reaction force F acts to the left on the saddle riding type vehicle 1. Therefore, the reaction force F acts in the opposite direction to the centrifugal force E on the saddle riding type vehicle 1. Therefore, the reaction force F cancels out at least a portion of the centrifugal force E.

[0213] The first force includes a first component force F1. The first component force F1 is a component of the reaction force F in the horizontal direction S. The first component force F1 acts on the saddle-type vehicle 1.

[0214] The first component of force F1 has a first horizontal direction S1. The centrifugal force E is directed to the right. For example, the centrifugal force E has a second horizontal direction S2. Therefore, the first component of force F1 has a direction opposite to the direction of the centrifugal force E.

[0215] When the saddle riding type vehicle 1 turns left on a curved road Cr, the first component force F1 acts in a first horizontal direction S1 on the saddle riding type vehicle 1. Therefore, the first component force F1 cancels out at least a part of the centrifugal force E.

[0216] <Example of the movement of the saddle-type vehicle 1 turning right> Finally, the operation of the saddle riding type vehicle 1 when turning right will be described.

[0217] Figures 14 and 15 are rear views of the saddle riding type vehicle 1. Figure 16 is a plan view of the saddle riding type vehicle 1. For ease of explanation, the exhaust device 29 is omitted from Figure 15.

[0218] When the saddle riding type vehicle 1 turns right on a curved road Cr, the centrifugal force E acts leftward on the saddle riding type vehicle 1. For example, the centrifugal force E acts on the saddle riding type vehicle 1 in a first horizontal direction S1.

[0219] The IMU 81 detects the tilt angles V1 and V2 of the saddle-ride type vehicle 1.

[0220] The ECU 75 determines that the tilt angle V2 is equal to or greater than the predetermined value L2. Alternatively, the ECU 75 may determine that the tilt condition is satisfied. The ECU 75 closes the exhaust port 71 with the on-off valve 58 and opens the exhaust port 73 with the on-off valve 58.

[0221] The exhaust device 29 is in a lateral injection state. The exhaust port 71 does not inject exhaust gas. The exhaust port 73 injects exhaust gas. The exhaust port 71 then applies a first force to the saddle riding type vehicle 1. The first force offsets at least a portion of the centrifugal force E.

[0222] Specifically, the exhaust port 73 injects the exhaust gas downward in the up-down direction Z. The saddle riding type vehicle 1 is tilted to the right. Therefore, the exhaust port 73 injects the exhaust gas in the same direction as the direction of the centrifugal force E. That is, the exhaust port 73 injects the exhaust gas to the left. For example, the exhaust port 73 injects the exhaust gas downward and to the left. For example, the exhaust port 73 injects the exhaust gas in a direction that combines the first horizontal direction S1 and the second vertical direction W2.

[0223] The jet H is formed by exhaust gas injected from the exhaust port 73 .

[0224] The first force is, for example, a reaction force F of the jet H.

[0225] When the saddle-ride type vehicle 1 turns right on the curved road Cr, the jet flow H flows leftward from the starting point Ce. For example, the jet flow H flows leftward and downward. The jet flow H has a direction that is a combination of a first horizontal direction S1 and a second vertical direction W2.

[0226] The reaction force F is directed to the right from the starting point Ce. For example, the reaction force F is directed to the right and upward. The reaction force F has a direction that is a combination of the second horizontal direction S2 and the first vertical direction W1.

[0227] The reaction force F acts to the right with respect to the saddle riding type vehicle 1. For example, the reaction force F acts to the right and upward with respect to the saddle riding type vehicle 1. The reaction force F acts to the saddle riding type vehicle 1 in the second horizontal direction S2 and upward in the vertical direction W.

[0228] The centrifugal force E acts to the left on the saddle riding type vehicle 1. The reaction force F acts to the right on the saddle riding type vehicle 1. Therefore, the reaction force F acts in the opposite direction to the centrifugal force E on the saddle riding type vehicle 1. Therefore, the reaction force F cancels out at least a portion of the centrifugal force E.

[0229] The first component of force F1 has a second horizontal direction S2. The centrifugal force E is directed to the left. For example, the centrifugal force E has a first horizontal direction S1. Therefore, the first component of force F1 has a direction opposite to the direction of the centrifugal force E.

[0230] When the saddle riding type vehicle 1 turns right on a curved road Cr, the first component force F1 acts in a second horizontal direction S2 on the saddle riding type vehicle 1. Therefore, the first component force F1 cancels out at least a part of the centrifugal force E.

[0231] <Effects of Example 1> The saddle-riding vehicle 1 is equipped with an exhaust device 29 that discharges exhaust gas. The exhaust device 29 is equipped with an exhaust port 73. The exhaust port 73 injects exhaust gas, causing a first force to act on the saddle-riding vehicle 1. When the saddle-riding vehicle 1 turns a curved road Cr, the first force offsets at least a portion of the centrifugal force E acting on the saddle-riding vehicle 1. Therefore, even if the centrifugal force E acting on the saddle-riding vehicle 1 increases, assistance can be provided to enable the saddle-riding vehicle 1 to properly turn the curved road Cr. In other words, even if the turning speed of the saddle-riding vehicle 1 increases during circuit driving, etc., assistance can be provided to enable the saddle-riding vehicle 1 to properly turn the curved road Cr. As an example, even if the centrifugal force E is large, the saddle-riding vehicle 1 is unlikely to deviate to the outside of the curved road Cr. Therefore, assistance can be provided to enable the saddle-riding vehicle 1 to properly turn the curved road Cr while increasing the turning speed during circuit driving, etc. Therefore, it is possible to provide a saddle-ride type vehicle 1 with good turning performance.

[0232] In the saddle-riding vehicle 1, exhaust gas is ejected from the exhaust port 73 of the exhaust device 29 to offset at least a portion of the centrifugal force E acting on the saddle-riding vehicle 1. That is, by ejecting exhaust gas from the exhaust port 73, the exhaust device 29 contributes to good cornering efficiency of the saddle-riding vehicle 1. A device for discharging exhaust gas is a configuration that is generally provided in a saddle-riding vehicle 1. Therefore, there is no need to equip the saddle-riding vehicle 1 with a new device, in addition to the exhaust device 29, for offsetting at least a portion of the centrifugal force E acting on the saddle-riding vehicle 1. This can contribute to good cornering efficiency of the saddle-riding vehicle 1 while avoiding an increase in the complexity of the saddle-riding vehicle 1. That is, a saddle-riding vehicle 1 with good cornering efficiency can be realized at lower cost. Furthermore, by effectively utilizing the exhaust gas that is inevitably generated when driving the saddle-riding vehicle 1, the exhaust device 29 can contribute to good cornering efficiency of the saddle-riding vehicle 1. That is, the exhaust device 29 can effectively utilize exhaust gas to contribute to the attitude control of the saddle riding type vehicle 1. Therefore, it is possible to realize a saddle riding type vehicle 1 that is environmentally friendly and has good turning efficiency.

[0233] The first force that offsets at least a portion of the centrifugal force E acting on the saddle-riding type vehicle 1 is a reaction force F of the jet flow H of exhaust gas ejected from the exhaust port 73. In other words, the reaction force F, which is the first force, is directed in the opposite direction to the ejection direction Rc of the exhaust gas ejected from the exhaust port 73. For this reason, ejecting exhaust gas from the exhaust port 73 makes it easy for the exhaust port 73 to apply the first force to the saddle-riding type vehicle 1.

[0234] When the saddle riding type vehicle 1 turns around a curved road Cr, the exhaust port 73 sprays exhaust gas in the same direction as the direction of centrifugal force E acting on the saddle riding type vehicle 1. For example, when the saddle riding type vehicle 1 turns around a curved road Cr to the right, the centrifugal force E acts on the saddle riding type vehicle 1 to the left, and the exhaust port 73 sprays exhaust gas to the left. For example, when the saddle riding type vehicle 1 turns around a curved road Cr to the left, the centrifugal force E acts on the saddle riding type vehicle 1 to the right, and the exhaust port 73 sprays exhaust gas to the right. Therefore, when the saddle riding type vehicle 1 turns around a curved road Cr, it is easy for the first force to offset at least a portion of the centrifugal force E acting on the saddle riding type vehicle 1.

[0235] When the saddle riding type vehicle 1 turns a curved road Cr, the first force includes a first component force F1. The first component force F1 has a direction opposite to the direction of the centrifugal force E acting on the saddle riding type vehicle 1. Therefore, when the saddle riding type vehicle 1 turns a curved road Cr, the first force easily cancels out at least a portion of the centrifugal force E acting on the saddle riding type vehicle 1.

[0236] The direction Rc of exhaust gas ejection from the exhaust port 73 changes depending on the lean angle V1 (leftward) and lean angle V2 (rightward) of the saddle riding type vehicle 1. The direction of the centrifugal force E also changes depending on the lean angles V1 and V2. Therefore, when the saddle riding type vehicle 1 turns on a curved road Cr, it becomes easy for the first force to offset at least a portion of the centrifugal force E.

[0237] The exhaust port 73 is installed so that the direction Rc of exhaust gas ejection from the exhaust port 73 is downward when the saddle riding type vehicle 1 is in an upright position. When the saddle riding type vehicle 1 leans to the right, the exhaust port 73 ejects exhaust gas. When the saddle riding type vehicle 1 leans to the left, the exhaust port 73 ejects exhaust gas.

[0238] For example, when the saddle-riding vehicle 1 turns to the right, it tilts from an upright position to the right. When the saddle-riding vehicle 1 tilts from an upright position to the right, the jetting direction Rc changes from downward to left. More specifically, when the saddle-riding vehicle 1 tilts from an upright position to the right, the jetting direction Rc changes from the second vertical direction W2 to a direction that combines the second vertical direction W2 and the first horizontal direction S1. For example, when the saddle-riding vehicle 1 turns to the left, it tilts from an upright position to the left. When the saddle-riding vehicle 1 tilts from an upright position to the left, the jetting direction Rc changes from downward to right. More specifically, when the saddle-riding vehicle 1 tilts from an upright position to the left, the jetting direction Rc changes from the second vertical direction W2 to a direction that combines the second vertical direction W2 and the second horizontal direction S2. In summary, the jetting direction Rc changes depending on the inclination angles V1 and V2. When the saddle riding type vehicle 1 turns a curved road Cr, the injection direction Rc is the same as the direction of the centrifugal force E. When the saddle riding type vehicle 1 turns a curved road Cr, the exhaust port 73 injects exhaust gas in the same direction as the direction of the centrifugal force E. Therefore, when the saddle riding type vehicle 1 turns a curved road Cr, it is easy for the first force to cancel out at least a part of the centrifugal force E.

[0239] The straddle-type vehicle 1 is provided with an on-off valve 58. The on-off valve 58 opens and closes the exhaust port 73. Therefore, it is easy to control the injection of exhaust gas from the exhaust port 73.

[0240] The saddle riding type vehicle 1 includes an IMU 81 and an ECU 75. The IMU 81 detects the leftward tilt angle V1 of the saddle riding type vehicle 1 and the rightward tilt angle V2 of the saddle riding type vehicle 1. The ECU 75 controls the on-off valve 58 based on the detection results of the IMU 81. This makes it easy to control the injection of exhaust gas from the exhaust port 73 in accordance with the tilt angles V1 and V2.

[0241] When the inclination angle V1 is equal to or greater than the predetermined value L1, the ECU 75 opens the exhaust port 73 using the on-off valve 58. When the inclination angle V2 is equal to or greater than the predetermined value L2, the ECU 75 opens the exhaust port 73 using the on-off valve 58. When the inclination angle V1 is equal to or greater than the predetermined value L1, the saddle-riding type vehicle is deemed to be turning left on the curved road Cr. When the inclination angle V2 is equal to or greater than the predetermined value L1, the saddle-riding type vehicle is deemed to be turning right on the curved road Cr. Therefore, when the saddle-riding type vehicle 1 turns the curved road Cr, the exhaust port 73 injects exhaust gas. Therefore, when the saddle-riding type vehicle 1 turns the curved road Cr, it is easy for the first force to offset at least a portion of the centrifugal force E.

[0242] Exhaust device 29 includes exhaust port 71 for discharging exhaust gas. Exhaust port 73 is smaller than exhaust port 71. Therefore, it is easy to increase the velocity of exhaust gas injected from exhaust port 73. Therefore, it is easy to increase the first force.

[0243] The exhaust port 73 has a diameter smaller than the diameter of the exhaust port 71. Therefore, when the exhaust port 73 injects exhaust gas, it is easy to increase the velocity of the exhaust gas injected from the exhaust port 73. Therefore, it is easy to increase the first force.

[0244] When the saddle riding type vehicle 1 travels straight on the straight path St, the saddle riding type vehicle 1 assumes an upright position. When the saddle riding type vehicle 1 assumes an upright position, the exhaust port 71 sprays exhaust gas in the direction opposite to the traveling direction P of the saddle riding type vehicle 1. The exhaust port 71 applies a reaction force Fc to the saddle riding type vehicle 1. The reaction force Fc has the same direction as the traveling direction P. Therefore, the saddle riding type vehicle 1 travels smoothly straight on the straight path St.

[0245] When the saddle-riding vehicle 1 travels straight on the straight path St, the exhaust port 73 does not spray exhaust gas. Incidentally, when the saddle-riding vehicle 1 travels straight on the straight path St, the centrifugal force E acting on the saddle-riding vehicle 1 is sufficiently small. Therefore, when the saddle-riding vehicle 1 travels straight on the straight path St, it is not necessary to offset at least a portion of the centrifugal force E. Therefore, even if the exhaust port 73 does not spray exhaust gas, the saddle-riding vehicle 1 travels smoothly straight on the straight path St. In fact, by not spraying exhaust gas from the exhaust port 73, the saddle-riding vehicle 1 travels even more smoothly straight on the straight path St.

[0246] The exhaust port 71 is larger than the exhaust port 73. Therefore, the exhaust port 71 efficiently discharges exhaust gas. For example, even when the speed of the saddle riding type vehicle 1 is high and a large amount of exhaust gas is generated, the exhaust port 71 discharges the exhaust gas smoothly. Therefore, the saddle riding type vehicle 1 travels appropriately straight on the straight path St.

[0247] The exhaust device 29 includes an on-off valve 58. The on-off valve 58 opens and closes an exhaust port 71. Therefore, it is easy to control the injection of exhaust gas from the exhaust port 71.

[0248] The saddle-riding type vehicle 1 includes an IMU 81 and an ECU 75. The IMU 81 detects the tilt angle V1 and the tilt angle V2. The ECU 75 controls the on-off valve 58 based on the detection result of the IMU 81. Therefore, it is easy to control the injection of exhaust gas from the exhaust port 71 in accordance with the tilt angle V1 and the tilt angle V2.

[0249] When the inclination angle V1 is equal to or greater than the predetermined value L1, the ECU 75 closes the exhaust port 71 using the on-off valve 58. When the inclination angle V2 is equal to or greater than the predetermined value L2, the ECU 75 closes the exhaust port 71 using the on-off valve 58. When the inclination angle V1 is equal to or greater than the predetermined value L1, the saddle-riding vehicle 1 is deemed to be turning on the curved road Cr. When the inclination angle V2 is equal to or greater than the predetermined value L2, the saddle-riding vehicle 1 is deemed to be turning on the curved road Cr. Therefore, when the saddle-riding vehicle 1 turns on the curved road Cr, the exhaust port 71 does not inject exhaust gas. Therefore, when the saddle-riding vehicle 1 turns on the curved road Cr, it is easy to increase the amount of exhaust gas injected from the exhaust port 73. Therefore, when the saddle-riding vehicle 1 turns on the curved road Cr, it is easy for the first force to offset at least a portion of the centrifugal force E. [Example]

[0250] A saddle-ride type vehicle 1A according to a second embodiment of the present invention will be described. Components identical to those of the saddle-ride type vehicle 1 according to the first embodiment will be assigned the same reference numerals, and only different components will be described in detail. An example of a component in the second embodiment that differs from that of the first embodiment is an exhaust device 29.

[0251] <Exhaust system configuration> Fig. 17 is a perspective view of an exhaust device 29A according to Example 2. Fig. 18 shows a vertical cross section of the exhaust device 29A according to Example 2 as seen from the rear of the vehicle. Fig. 19 is a cross section taken along the line BB in Fig. 18.

[0252] The saddle riding type vehicle 1A is equipped with an exhaust device 29A. The exhaust device 29A is equipped with an exhaust port 71 and an exhaust port 73A. The exhaust port 73A has a left exhaust port 83A and a right exhaust port 85A. The left exhaust port 83A injects exhaust gas. The left exhaust port 83A injects exhaust gas from the inside of the exhaust device 29 to the outside of the exhaust device 29. The right exhaust port 85A injects exhaust gas. The right exhaust port 85A injects exhaust gas from the inside of the exhaust device 29 to the outside of the exhaust device 29. The exhaust port 71, the left exhaust port 83A, and the right exhaust port 85A are configured to discharge exhaust gas in different directions. In other words, the exhaust device 29A is configured to be able to discharge exhaust gas in three different directions.

[0253] The left exhaust port 83A is installed to inject exhaust gas to the left, and the right exhaust port 85A is installed to inject exhaust gas to the right.

[0254] The exhaust port 73A is an example of a first exhaust port in the present invention. The left exhaust port 83A is an example of a left exhaust port in the present invention. The right exhaust port 85A is an example of a right exhaust port in the present invention.

[0255] 18 shows the injection direction Ra. The injection direction Ra is the direction in which exhaust gas is injected from the left exhaust port 83A. When the saddle riding type vehicle 1A is in an upright position, the left exhaust port 83A is positioned so that the injection direction Ra is to the left and downward.

[0256] For example, the jetting direction Ra is downward in the vertical direction Z and to the left in the width direction Y. When the saddle riding type vehicle 1A is in an upright position, the angle Y1 between the jetting direction Ra and the vertical direction Z is greater than 0 degrees. The angle Y1 between the jetting direction Ra and the vertical direction Z is smaller than 90 degrees.

[0257] For example, the spray direction Ra is constant relative to the body frame 3. The angle between the spray direction Ra and the vertical direction Z does not change.

[0258] 18 shows the injection direction Rb. The injection direction Rb is the direction in which exhaust gas is injected from the right exhaust port 85A. When the saddle riding type vehicle 1A is in an upright position, the right exhaust port 85A is positioned so that the injection direction Rb is to the right and downward.

[0259] For example, the jetting direction Rb is downward in the vertical direction Z and to the right in the width direction Y. When the saddle riding type vehicle 1A is in an upright position, the angle Y2 between the jetting direction Rb and the vertical direction Z is greater than 0 degrees. The angle Y2 between the jetting direction Rb and the vertical direction Z is smaller than 90 degrees.

[0260] For example, the jetting direction Rb is constant relative to the body frame 3. The angle between the jetting direction Rb and the vertical direction Z does not change.

[0261] The structure of the exhaust device 29A will be described.

[0262] The exhaust device 29A includes a junction pipe 55, a first branch pipe 56, a left branch pipe 87A, and a right branch pipe 89A. The junction pipe 55 is connected to the first branch pipe 56, the left branch pipe 87A, and the right branch pipe 89A. The junction pipe 55 branches into the first branch pipe 56, the left branch pipe 87A, and the right branch pipe 89A.

[0263] Specifically, branch portion 60 of junction pipe 55 is connected to one end of first branch pipe 56, one end of left branch pipe 87A, and one end of right branch pipe 89A. In other words, exhaust device 29A has a structure in which junction pipe 55 branches at branch portion 60 into first branch pipe 56, left branch pipe 87A, and right branch pipe 89A.

[0264] The configurations of the first branch pipe 56 and the exhaust port 71 in the second embodiment are the same as those in the first embodiment. That is, the first branch pipe 56 extends rearward from the branching portion 60 in a side view of the vehicle. The exhaust port 71 is provided at the other end of the first branch pipe 56. The exhaust port 71 is configured to discharge exhaust gas rearward in a side view of the vehicle.

[0265] The left exhaust port 83A is provided at the other end of the left branch pipe 87A. Specifically, the left exhaust port 83A discharges the exhaust gas that has flowed from the junction pipe 55 to the left branch pipe 87A to the outside of the exhaust device 29A.

[0266] When the saddle riding type vehicle 1A is in an upright position, the left branch pipe 87 extends leftward and downward from the branching portion 60 in a rear view of the vehicle. For example, the left branch pipe 87A extends from the branching portion 60 in the jetting direction Ra.

[0267] The right exhaust port 85A is provided at the other end of the right branch pipe 89A. Specifically, the right exhaust port 85A discharges the exhaust gas that has flowed from the junction pipe 55 to the right branch pipe 89A to the outside of the exhaust device 29A.

[0268] When the saddle riding type vehicle 1A is in an upright position, the right branch pipe 89A extends rightward and downward from the branching portion 60 in a rear view of the vehicle. For example, the right branch pipe 89A extends from the branching portion 60 in the injection direction Rb.

[0269] The left exhaust port 83A is smaller than the exhaust port 71. The right exhaust port 85A is smaller than the exhaust port 71.

[0270] For example, the left exhaust port 83A has a diameter smaller than the diameter of the exhaust port 71. For example, the right exhaust port 85A has a diameter smaller than the diameter of the exhaust port 71.

[0271] The exhaust device 29A includes a passage change unit 90. The passage change unit 90 changes the path of exhaust gas within the exhaust device 29A. The passage change unit 90 switches the exhaust device 29A between a left injection state and a right injection state. When the exhaust device 29A is in the left injection state, the exhaust device 29A injects exhaust gas from the left exhaust port 83A. When the exhaust device 29A is in the right injection state, the exhaust device 29A injects exhaust gas from the right exhaust port 85A.

[0272] When exhaust system 29A is in the left-side injection state, exhaust system 29A preferably does not inject exhaust gases from right exhaust port 85A. When exhaust system 29A is in the left-side injection state, exhaust system 29A preferably does not inject exhaust gases from exhaust port 71.

[0273] When exhaust system 29A is in the right-side injection state, exhaust system 29A preferably does not inject exhaust gases from left exhaust port 83A. When exhaust system 29A is in the right-side injection state, exhaust system 29A preferably does not inject exhaust gases from exhaust port 71.

[0274] The passage changing unit 90 may further switch the exhaust device 29A to a rearward injection state. When the exhaust device 29A is in the rearward injection state, the exhaust device 29A injects exhaust gas from the exhaust port 71.

[0275] When exhaust system 29A is in the rearward-injecting state, exhaust system 29A preferably does not inject exhaust gases from left exhaust port 83A. When exhaust system 29A is in the rearward-injecting state, exhaust system 29A preferably does not inject exhaust gases from right exhaust port 85A.

[0276] The passage changing unit 90 includes a left on-off valve 91, a right on-off valve 93, and an on-off valve 95. The left on-off valve 91 opens and closes the left exhaust port 83. The right on-off valve 93 opens and closes the right exhaust port 85. The on-off valve 95 opens and closes the exhaust port 71.

[0277] The left on-off valve 91 is disposed in the left branch pipe 87 A. The right on-off valve 93 is disposed in the right branch pipe 89 A. The on-off valve 95 is disposed in the first branch pipe 56.

[0278] When the passage change unit 90 switches the exhaust device 29A to the left injection state, the left on-off valve 91 opens the left exhaust port 83A, the right on-off valve 93 closes the right exhaust port 85A, and the on-off valve 95 closes the exhaust port 71.

[0279] When the passage change unit 90 switches the exhaust device 29A to the right injection state, the left on-off valve 91 closes the left exhaust port 83A, the right on-off valve 93 opens the right exhaust port 85A, and the on-off valve 95 closes the exhaust port 71.

[0280] When the passage change unit 90 switches the exhaust device 29A to the rearward injection state, the left on-off valve 91 closes the left exhaust port 83A, the right on-off valve 93 closes the right exhaust port 85A, and the on-off valve 95 opens the exhaust port 71.

[0281] The left on-off valve 91, the right on-off valve 93, and the on-off valve 95 are, for example, electrically operated valves.

[0282] The on-off valve 95 is also an example of a main valve in the present invention. The left on-off valve 91 and the right on-off valve 93 are also examples of first valves in the present invention.

[0283] <Control system configuration> The control system of the saddle riding type vehicle 1A will be described.

[0284] FIG. 20 is a functional block diagram illustrating a control system of a saddle-ride type vehicle 1A according to the second embodiment.

[0285] The saddle riding type vehicle 1A includes an ECU 75A. The ECU 75A controls the passage changing unit 90 based on the detection results of the IMU 81. The ECU 75A controls the left on-off valve 91, the right on-off valve 93, and the on-off valve 95 based on the detection results of the IMU 81. The ECU 75A switches the exhaust device 29A between a right injection state and a left injection state based on the inclination angles V1 and V2. Furthermore, the ECU 75A may switch the exhaust device 29A to a rear injection state based on the inclination angles V1 and V2.

[0286] The ECU 75A is an example of a control unit in the present invention. The ECU 75A is also an example of a main valve control unit in the present invention. The ECU 75A is also an example of a first valve control unit in the present invention.

[0287] For example, when the inclination angle V1 is equal to or greater than a predetermined value L1, the ECU 75A switches the exhaust device 29A to a rightward injection state using the passage changing unit 90. When the inclination angle V1 is equal to or greater than the predetermined value L1, the ECU 75A controls the passage changing unit 90 to inject exhaust gas from the right exhaust port 85A.

[0288] When the inclination angle V2 is equal to or greater than the predetermined value L2, the ECU 75A switches the exhaust device 29A to a left injection state using the passage changing unit 90. When the inclination angle V2 is equal to or greater than the predetermined value L2, the ECU 75A controls the passage changing unit 90 to inject exhaust gas from the left exhaust port 83A.

[0289] When the inclination angle V1 is less than the predetermined value L1 and the inclination angle V2 is less than the predetermined value L2, the ECU 75A switches the exhaust device 29A to the rear injection state by the passage changing unit 90. When the inclination angle V1 is less than the predetermined value L1 and the inclination angle V2 is less than the predetermined value L2, the ECU 75A controls the passage changing unit 90 to inject exhaust gas from the exhaust port 71.

[0290] Alternatively, the storage unit 79 may store an upright condition, a left tilt condition, and a right tilt condition. The ECU 75A may control the path changing unit 90 based on the inclination angles V1 and V2, the upright condition, the left inclination condition, and the right inclination condition. The upright condition, right tilt condition, and left tilt condition are defined by predetermined values ​​L1 and L2.

[0291] The upright condition is as described in Example 1. When the upright condition is met, the ECU 75A causes the passage changing unit 90 to switch the exhaust device 29A to the rear injection state.

[0292] The left lean condition is that the lean angle V1 is equal to or greater than a predetermined value L1. When the left lean condition is met, the saddle riding type vehicle 1A is considered to be leaning to the left. When the left lean condition is met, the ECU 75A causes the passage changing unit 90 to switch the exhaust device 29A to a rightward injection state.

[0293] The right lean condition is that the lean angle V2 is equal to or greater than a predetermined value L2. When the right lean condition is met, the saddle riding type vehicle 1A is deemed to be in a rightward leaning posture. When the right lean condition is met, the ECU 75A causes the passage changing unit 90 to switch the exhaust device 29A to a leftward injection state.

[0294] <Example of the movement of saddle-type vehicle 1A going straight> The operation of the saddle riding type vehicle 1A moving straight will be described.

[0295] FIG. 21(a) is a rear view of the saddle riding type vehicle 1A.

[0296] The saddle-type vehicle 1A is in an upright position.

[0297] The IMU 81 detects the tilt angles V1 and V2 of the saddle riding type vehicle 1A.

[0298] The ECU 75A determines that the inclination angle V1 is less than a predetermined value L1. The ECU 75A determines that the inclination angle V2 is less than a predetermined value L2. Alternatively, the ECU 75A may determine that the upright condition is satisfied. The ECU 75A controls the passage changing unit 90. The ECU 75A switches the exhaust device 29A to a rear injection state.

[0299] The exhaust device 29A is in a rearward injection state, and the exhaust port 71 injects exhaust gas rearward.

[0300] <Example of the movement of saddle-type vehicle 1A turning left> The operation of the saddle riding type vehicle 1A when turning left will be described.

[0301] 21(b), 22, and 23 are rear views of the saddle riding type vehicle 1A. Note that in Fig. 23, for the sake of convenience, the exhaust device 29A is omitted.

[0302] The centrifugal force E acts to the right on the saddle-type vehicle 1A.

[0303] The saddle-type vehicle 1A tilts to the left.

[0304] The IMU 81 detects the tilt angles V1 and V2.

[0305] The ECU 75A determines that the tilt angle V1 is equal to or greater than the predetermined value L1. Alternatively, the ECU 75A may determine that the left tilt condition is satisfied. The ECU 75A controls the passage changing unit 90. The ECU 75A switches the exhaust device 29A to a rightward injection state.

[0306] The exhaust device 29A is in a rightward injection state. The right exhaust port 85A injects exhaust gas. The right exhaust port 85A applies a first force to the saddle riding type vehicle 1. The first force offsets at least a portion of the centrifugal force E.

[0307] Specifically, the right exhaust port 85A injects exhaust gas in the same direction as the direction of centrifugal force E. That is, the right exhaust port 85A injects exhaust gas to the right.

[0308] For example, the right exhaust port 85A injects exhaust gas downward and to the right. The right exhaust port 85A injects exhaust gas horizontally and to the right. The right exhaust port 85A injects exhaust gas in a second horizontal direction S2.

[0309] The jetting direction Rb is relatively close to the horizontal. The jetting direction Rb is relatively close to the second horizontal direction S2. For example, referring to FIGS. 11 and 22, compare the jetting direction Rb with the jetting direction Rc of Example 1. The angle between the jetting direction Rb and the second horizontal direction S2 is smaller than the angle between the jetting direction Rc and the second horizontal direction S2.

[0310] The jet H flows to the right from the starting point Ce. For example, the jet H flows to the right and downward. The jet H flows to the right and horizontally. The jet H flows in a second horizontal direction S2.

[0311] The first force is, for example, a reaction force F of the jet H. The reaction force F acts to the left of the saddle riding type vehicle 1A. For example, the reaction force F acts to the left and upward of the saddle riding type vehicle 1A. The reaction force F acts to the left and horizontally of the saddle riding type vehicle 1A. The reaction force F acts in a first horizontal direction S1 on the saddle riding type vehicle 1A.

[0312] The reaction force F acts on the saddle riding type vehicle 1 in the opposite direction to the centrifugal force E. The reaction force F cancels out at least a portion of the centrifugal force E.

[0313] The first component force F1 has a first horizontal direction S1. The first component force F1 has a direction opposite to the direction of the centrifugal force E. Therefore, the first component force F1 cancels out at least a portion of the centrifugal force E.

[0314] As described above, the jet direction Rb is relatively close to horizontal. Therefore, the magnitude of the first component force F1 is relatively close to the magnitude of the reaction force F. In other words, the first component force F1 is relatively large. Therefore, when the saddle riding type vehicle 1A turns left on a curved road Cr, the first component force F1 offsets a larger portion of the centrifugal force E. When the saddle riding type vehicle 1A turns left on a curved road Cr, the reaction force F effectively offsets the centrifugal force E.

[0315] <Example of the movement of saddle-type vehicle 1A turning right> The operation of the saddle riding type vehicle 1A when turning right will be described.

[0316] 21(c), 24, and 25 are rear views of the saddle riding type vehicle 1A. Note that in Fig. 25, for the sake of convenience, the exhaust device 29A is omitted.

[0317] The centrifugal force E acts leftward on the saddle-type vehicle 1A.

[0318] The saddle-type vehicle 1A tilts to the right.

[0319] The IMU 81 detects the tilt angles V1 and V2.

[0320] The ECU 75A determines that the tilt angle V2 is equal to or greater than the predetermined value L2. Alternatively, the ECU 75A may determine that the right tilt condition is satisfied. The ECU 75A controls the passage changing unit 90. The ECU 75A switches the exhaust device 29A to a leftward injection state.

[0321] The exhaust device 29A is in a leftward injection state. The left exhaust port 83A injects exhaust gas. The left exhaust port 83A applies a first force to the saddle riding type vehicle 1. The first force offsets at least a portion of the centrifugal force E.

[0322] Specifically, the left exhaust port 83A injects exhaust gas in the same direction as the direction of centrifugal force E. That is, the left exhaust port 83A injects exhaust gas to the left.

[0323] For example, the left exhaust port 83A injects exhaust gas downward and to the left. The left exhaust port 83A injects exhaust gas horizontally and to the left. The left exhaust port 83A injects exhaust gas in a first horizontal direction S1.

[0324] The spray direction Ra is relatively close to the horizontal. The spray direction Ra is relatively close to the first horizontal direction S1. For example, referring to FIGS. 14 and 24, compare the spray direction Ra with the spray direction Rc of Example 1. The angle between the spray direction Ra and the first horizontal direction S1 is smaller than the angle between the spray direction Rc and the first horizontal direction S1.

[0325] The jet H flows leftward from the starting point Ce. For example, the jet H flows leftward and downward. The jet H flows leftward and horizontally. The jet H flows in a first horizontal direction S1.

[0326] The first force is, for example, a reaction force F of the jet H. The reaction force F acts to the right on the saddle riding type vehicle 1A. For example, the reaction force F acts to the right and upward on the saddle riding type vehicle 1A. The reaction force F acts to the right and horizontally on the saddle riding type vehicle 1A. The reaction force F acts in the second horizontal direction S2 on the saddle riding type vehicle 1A.

[0327] The reaction force F acts on the saddle riding type vehicle 1A in the opposite direction to the centrifugal force E. The reaction force F cancels out at least a portion of the centrifugal force E.

[0328] The first component force F1 has a second horizontal direction S2. The first component force F1 has a direction opposite to the direction of the centrifugal force E. Therefore, the first component force F1 cancels out at least a portion of the centrifugal force E.

[0329] As described above, the jet direction Ra is relatively close to horizontal. Therefore, the magnitude of the first component force F1 is relatively close to the magnitude of the reaction force F. In other words, the first component force F1 is relatively large. Therefore, when the saddle riding type vehicle 1A turns right on a curved road Cr, the first component force F1 offsets a larger portion of the centrifugal force E. When the saddle riding type vehicle 1A turns right on a curved road Cr, the reaction force F effectively offsets the centrifugal force E.

[0330] <Effects of Example 2> The saddle-riding vehicle 1A of the second embodiment has the same effects as the saddle-riding vehicle 1 of the first embodiment. For example, the saddle-riding vehicle 1A is equipped with an exhaust device 29A. The exhaust device 29A is equipped with an exhaust port 73A. The exhaust port 73A injects exhaust gas to apply a first force to the saddle-riding vehicle 1A. When the saddle-riding vehicle 1A turns a curved road Cr, the first force cancels out at least a portion of the centrifugal force E acting on the saddle-riding vehicle 1A. The first force is, for example, a reaction force F of the jet flow H. It is therefore possible to provide a saddle-riding vehicle 1A with good turning performance.

[0331] Furthermore, the saddle riding type vehicle 1A of the second embodiment has the following effects.

[0332] The exhaust port 73A includes a right exhaust port 85A and a left exhaust port 83A. The right exhaust port 85A is installed so as to inject exhaust gas to the right. The left exhaust port 83 is installed so as to inject exhaust gas to the left. The exhaust device 29A includes a passage changing unit 90. The passage changing unit 90 changes the passage of exhaust gas within the exhaust device 29A, switching between a right injection state and a left injection state. In the right injection state, exhaust gas is injected from the right exhaust port 85A. In the left injection state, exhaust gas is injected from the left exhaust port 83A. The saddle riding type vehicle 1A includes an IMU 81 and an ECU 75A. The ECU 75A controls the passage changing unit 90 based on the detection results of the IMU 81.

[0333] For this reason, it is easy to change the exhaust gas injection directions Ra, Rb in accordance with the inclination angles V1, V2. Furthermore, when the saddle riding vehicle 1A turns a curved road Cr, it is easy to inject the exhaust gas in the same direction as the centrifugal force E. For example, when the saddle riding vehicle 1A turns to the right, it is easy to inject the exhaust gas from the left exhaust port 83. For example, when the saddle riding vehicle 1A turns to the left, it is easy to inject the exhaust gas from the right exhaust port 85. Therefore, when the saddle riding vehicle 1A turns a curved road Cr, it is easy for the first force to offset at least a portion of the centrifugal force E.

[0334] When the inclination angle V1 is equal to or greater than the predetermined value L1, the ECU 75A controls the passage changing unit 90 to inject exhaust gas from the right exhaust port 85A. When the inclination angle V1 is equal to or greater than the predetermined value L1, it is determined that the saddle riding type vehicle 1A is turning left. Therefore, when the saddle riding type vehicle 1A is turning left, it is easy to inject exhaust gas from the right exhaust port 85A. Therefore, when the saddle riding type vehicle 1A is turning left, it is easy for the first force to offset at least a portion of the centrifugal force E.

[0335] When the inclination angle V2 is equal to or greater than the predetermined value L2, the ECU 75A controls the passage changing unit 90 to inject exhaust gas from the left exhaust port 83. When the inclination angle V2 is equal to or greater than the predetermined value L2, it is determined that the saddle riding type vehicle 1A is turning to the right. Therefore, when the saddle riding type vehicle 1A is turning to the right, it is easy to inject exhaust gas from the left exhaust port 83A. Therefore, when the saddle riding type vehicle 1A is turning to the right, it is easy for the first force to offset at least a portion of the centrifugal force E.

[0336] When the saddle riding type vehicle 1A is in an upright position, the right exhaust port 85A is positioned so that the exhaust gas ejection direction Rb from the right exhaust port 85A is to the right and downward. When the saddle riding type vehicle 1A is in an upright position, the ejection direction Rb is a combination of the second horizontal direction S2 and the second vertical direction W2. When the saddle riding type vehicle 1A is in an upright position, the left exhaust port 83A is positioned so that the exhaust gas ejection direction from the left exhaust port 83A is to the left and downward. When the saddle riding type vehicle 1A is in an upright position, the ejection direction Ra is a combination of the first horizontal direction S1 and the second vertical direction W2.

[0337] For example, when the saddle riding vehicle 1A turns to the right, the saddle riding vehicle 1A tilts from an upright position to the right. When the saddle riding vehicle 1A tilts from an upright position to the right, the jetting direction Ra changes from left and downward to left and horizontal. When the saddle riding vehicle 1A tilts from an upright position to the right, the jetting direction Ra changes from a combination of the first horizontal direction S1 and the second vertical direction W2 to the first horizontal direction S1. For example, when the saddle riding vehicle 1A turns to the left, the saddle riding vehicle 1A tilts from an upright position to the left. When the saddle riding vehicle 1A tilts from an upright position to the left, the jetting direction Rb changes from a right and downward to right and horizontal. When the saddle riding vehicle 1A tilts from an upright position to the left, the jetting direction Rb changes from a combination of the second horizontal direction S2 and the second vertical direction W2 to the second horizontal direction S2. In summary, when the saddle riding type vehicle 1A turns a curved road Cr, the exhaust port 73A injects exhaust gas in substantially the same direction as the direction of the centrifugal force E. Therefore, when the saddle riding type vehicle 1A turns a curved road Cr, it is easy for the first force to offset at least a portion of the centrifugal force E. For example, the portion of the centrifugal force E that is offset by the first force becomes larger. As the portion of the centrifugal force E that is offset by the first force becomes larger, the turning performance of the saddle riding type vehicle 1A further improves. [Example]

[0338] Next, a saddle-ride type vehicle 1B according to a third embodiment of the present invention will be described. The same components as those in the first or second embodiment will be given the same reference numerals, and only different components will be described in detail.

[0339] <Exhaust system configuration> Fig. 26 is a perspective view of an exhaust device 29B according to Example 3. Fig. 27 shows a vertical cross section of the exhaust device 29B according to Example 3 as seen from the rear of the vehicle.

[0340] The straddle-type vehicle 1B is equipped with an exhaust device 29B. The exhaust device 29B is similar to the exhaust device 29A of the second embodiment. However, the exhaust device 29B differs from the exhaust device 29A in terms of the injection directions Ra and Rb.

[0341] The exhaust device 29B has an exhaust port 71 and an exhaust port 73B. The exhaust port 73B has a left exhaust port 83B and a right exhaust port 85B. The left exhaust port 83B injects exhaust gas. The left exhaust port 83B injects exhaust gas from the inside of the exhaust device 29B to the outside of the exhaust device 29B. The right exhaust port 85B injects exhaust gas. The right exhaust port 85B injects exhaust gas from the inside of the exhaust device 29B to the outside of the exhaust device 29B.

[0342] The left exhaust port 83B is installed to inject exhaust gas to the left, and the right exhaust port 85B is installed to inject exhaust gas to the right.

[0343] The exhaust port 73B is an example of a first exhaust port in the present invention. The left exhaust port 83B is an example of a left exhaust port in the present invention. The right exhaust port 85B is an example of a right exhaust port in the present invention.

[0344] When the saddle riding type vehicle 1B is in an upright position, the left exhaust port 83B is disposed so that the ejection direction Ra of the exhaust gas from the left exhaust port 83B is horizontal and to the left.

[0345] For example, the jetting direction Ra is to the left of the width direction Y. The angle between the jetting direction Ra and the vertical direction Z is 90 degrees. The jetting direction Ra is parallel to the width direction Y.

[0346] For example, the spray direction Ra is constant relative to the body frame 3. The angle between the spray direction Ra and the vertical direction Z does not change.

[0347] When the saddle riding type vehicle 1B is in an upright position, the right exhaust port 83B is disposed so that the ejection direction Rb of the exhaust gas from the right exhaust port 85B is to the right and horizontal.

[0348] For example, the jetting direction Rb is to the right of the width direction Y. The angle between the jetting direction Rb and the vertical direction Z is 90 degrees. The jetting direction Rb is parallel to the width direction Y.

[0349] For example, the jetting direction Rb is constant relative to the body frame 3. The angle between the jetting direction Rb and the vertical direction Z does not change.

[0350] The structure of the exhaust device 29B will be described.

[0351] The exhaust device 29B includes a junction pipe 55, a first branch pipe 56, a left branch pipe 87B, and a right branch pipe 89B. The junction pipe 55 is connected to the first branch pipe 56, the left branch pipe 87B, and the right branch pipe 89B. The junction pipe 55 branches into the first branch pipe 56, the left branch pipe 87B, and the right branch pipe 89B.

[0352] The left exhaust port 83B is provided at the other end of the left branch pipe 87B. Specifically, the left exhaust port 83B discharges the exhaust gas that has flowed from the junction pipe 55 to the left branch pipe 87B to the outside of the exhaust device 29B.

[0353] When the saddle riding type vehicle 1B is in an upright position, the left branch pipe 87B extends horizontally to the left from the junction pipe 55 in a rear view of the vehicle. For example, the left branch pipe 87B extends from the junction pipe 55 in the jetting direction Ra.

[0354] The right exhaust port 85B is provided at the other end of the right branch pipe 89B. Specifically, the right exhaust port 85B discharges the exhaust gas that has flowed from the junction pipe 55 to the right branch pipe 89B to the outside of the exhaust device 29B.

[0355] When the saddle riding type vehicle 1B is in an upright position, the right branch pipe 89B extends horizontally and to the right from the junction pipe 55 in a rear view of the vehicle. For example, the right branch pipe 89B extends from the junction pipe 55 in the jetting direction Rb.

[0356] The exhaust device 29B includes a passage changing unit 90. The passage changing unit 90 is as described in the second embodiment. For example, the passage changing unit 90 includes a left on-off valve 91, a right on-off valve 93, and an on-off valve 95. For example, the left on-off valve 91 is disposed in the left branch pipe 87B. The right on-off valve 93 is disposed in the right branch pipe 89B.

[0357] <Control system configuration> For convenience, refer to Figure 20. The control system of the third embodiment is common to the control system of the second embodiment, i.e., the saddle riding type vehicle 1B includes an ECU 75A and an IMU 81. The ECU 75A controls the passage changing unit 90 based on the detection result of the IMU 81. The ECU 75A controls the left on-off valve 91, the right on-off valve 93, and the on-off valve 95 based on the detection result of the IMU 81. The ECU 75A switches the exhaust device 29B between a right injection state, a left injection state, and a rear injection state based on the inclination angles V1 and V2.

[0358] <Example of the movement of saddle-type vehicle 1B going straight> The operation of the saddle riding type vehicle 1B moving straight will be described.

[0359] FIG. 28(a) is a rear view of the saddle riding type vehicle 1B.

[0360] The saddle-type vehicle 1B takes an upright position.

[0361] Based on the detection result of the IMU 81, the ECU 75A causes the passage changing unit 90 to switch the exhaust device 29B to the rear injection state.

[0362] The exhaust device 29B is in a rearward injection state, and the exhaust port 71 injects exhaust gas rearward.

[0363] <Example of movement of saddle-type vehicle 1B turning left> The operation of the saddle riding type vehicle 1B turning left will be described.

[0364] 28(b), 29, and 30 are rear views of the saddle riding type vehicle 1B.

[0365] The centrifugal force E acts to the right on the saddle-type vehicle 1B.

[0366] The saddle-type vehicle 1B tilts to the left.

[0367] Based on the detection result of the IMU 81, the ECU 75A causes the passage change unit 90 to switch the exhaust device 29B to the right injection state.

[0368] The exhaust device 29B is in a rightward injection state. The right exhaust port 85B injects exhaust gas, causing a first force to act on the saddle riding type vehicle 1B. The first force offsets at least a part of the centrifugal force E.

[0369] Specifically, the right exhaust port 85B injects exhaust gas in the same direction as the direction of centrifugal force E. That is, the right exhaust port 85B injects exhaust gas to the right.

[0370] For example, the right exhaust port 85B injects exhaust gases to the right and upward. The right exhaust port 85A injects exhaust gas in a direction that is a combination of the second horizontal direction S2 and the first vertical direction W1.

[0371] The jet H flows to the right from the starting point Ce. For example, the jet H flows to the right and upward. The jet H has a direction that is a combination of the second horizontal direction S2 and the first vertical direction W1.

[0372] The first force is, for example, a reaction force F of the jet H. The reaction force F acts to the left of the saddle riding type vehicle 1B. For example, the reaction force F acts to the left and downward of the saddle riding type vehicle 1B. The reaction force F acts on the saddle riding type vehicle 1B in a direction that is a combination of the first horizontal direction S1 and the second vertical direction W2.

[0373] The reaction force F acts on the saddle riding type vehicle 1B in the opposite direction to the centrifugal force E. The reaction force F cancels out at least a part of the centrifugal force E.

[0374] The first component force F1 has a first horizontal direction S1. The first component force F1 has a direction opposite to the direction of the centrifugal force E. Therefore, the first component force F1 cancels out at least a portion of the centrifugal force E.

[0375] The reaction force F includes a second component force F2. The second component force F2 is a component of the reaction force F in the vertical direction W. The second component force F2 acts on the saddle riding type vehicle 1B.

[0376] When the saddle riding type vehicle 1B turns counterclockwise on a curved road Cr, the second component force F2 has a second vertical direction W2. The second component force F2 acts on the saddle riding type vehicle 1B in the second vertical direction W2. The second component force F2 acts in a direction that presses the front wheel 24 and the rear wheel 49 against the road surface G.

[0377] As a result, the grip between the rear wheel 49 and the road surface G is improved. The grip between the front wheel 24 and the road surface G is also improved. The traction performance of the saddle-riding type vehicle 1B is improved. Furthermore, the second component force F2 acts in a direction that prevents the front wheel 24 from lifting up above the road surface G. In other words, when driving on a circuit, for example, the saddle-riding type vehicle 1B is less likely to perform a wheelie.

[0378] <Example of movement of saddle-type vehicle 1B turning right> The operation of the saddle riding type vehicle 1B turning right will be described.

[0379] 28(c), 31, and 32 are rear views of the saddle riding type vehicle 1B.

[0380] The saddle-type vehicle 1B tilts to the right.

[0381] Based on the detection result of the IMU 81, the ECU 75A causes the passage change unit 90 to switch the exhaust device 29B to the left injection state.

[0382] The exhaust device 29B is in a leftward injection state. The left exhaust port 83B injects exhaust gas, causing a first force to act on the saddle riding type vehicle 1B. The first force offsets at least a part of the centrifugal force E.

[0383] Specifically, the left exhaust port 83B injects exhaust gas in the same direction as the direction of centrifugal force E. That is, the left exhaust port 83B injects exhaust gas to the left.

[0384] For example, the left exhaust port 83B injects exhaust gases leftward and upward. The left exhaust port 83B injects exhaust gas in a direction that is a combination of the first horizontal direction S1 and the first vertical direction W1.

[0385] The jet H flows leftward from the starting point Ce. For example, the jet H flows leftward and upward. The jet H has a direction that is a combination of a first horizontal direction S1 and a first vertical direction W1.

[0386] The first force is, for example, a reaction force F of the jet flow H. The reaction force F acts to the right of the saddle riding type vehicle 1B. For example, the reaction force F acts to the right and downward of the saddle riding type vehicle 1B. The reaction force F acts to the saddle riding type vehicle 1B in a direction that is a combination of the second horizontal direction S2 and the second vertical direction W2.

[0387] The reaction force F acts on the saddle riding type vehicle 1B in the opposite direction to the centrifugal force E. The reaction force F cancels out at least a part of the centrifugal force E.

[0388] The first component force F1 has a second horizontal direction S2. The first component force F1 has a direction opposite to the direction of the centrifugal force E. Therefore, the first component force F1 cancels out at least a portion of the centrifugal force E.

[0389] When the saddle riding type vehicle 1B turns right on the curved road Cr, the second component force F2 has a second vertical direction W2. The second component force F2 acts on the saddle riding type vehicle 1B in the second vertical direction W2. The second component force F2 acts in a direction that presses the front wheel 24 and the rear wheel 49 against the road surface G.

[0390] <Effects of Example 3> The saddle-riding type vehicle 1B according to the third embodiment has the same effects as the saddle-riding type vehicle 1 according to the first embodiment. For example, the saddle-riding type vehicle 1B is provided with an exhaust device 29B. The exhaust device 29B is provided with an exhaust port 73B. The exhaust port 73B injects exhaust gas to apply a first force to the saddle-riding type vehicle 1B. When the saddle-riding type vehicle 1B turns a curved road Cr, the first force cancels out at least a portion of the centrifugal force E acting on the saddle-riding type vehicle 1B. The first force is, for example, a reaction force F of the jet flow H. Therefore, it is possible to provide a saddle-riding type vehicle 1B with good turning performance.

[0391] Furthermore, the saddle riding type vehicle 1B according to the third embodiment has the following advantages.

[0392] The exhaust device 29B has a left exhaust port 83B and a right exhaust port 85B. When the saddle riding type vehicle 1B is in an upright position, the right exhaust port 85B is positioned so that the exhaust gas ejection direction Rb from the right exhaust port 85B is to the right and horizontal. When the saddle riding type vehicle 1B is in an upright position, the right exhaust port 85B is positioned so that the ejection direction Rb is the second horizontal direction S2. When the saddle riding type vehicle 1B is in an upright position, the left exhaust port 83B is positioned so that the exhaust gas ejection direction Rb from the left exhaust port 83B is to the left and horizontal. When the saddle riding type vehicle 1B is in an upright position, the left exhaust port 83B is positioned so that the ejection direction Ra is the first horizontal direction S1.

[0393] For example, when the saddle riding vehicle 1B turns to the right, the saddle riding vehicle 1B tilts from an upright position to the right. When the saddle riding vehicle 1B tilts from an upright position to the right, the jetting direction Ra changes from left and horizontal to left and upward. When the saddle riding vehicle 1B tilts from an upright position to the right, the jetting direction Ra changes from the first horizontal direction S1 to a direction that combines the first horizontal direction S1 and the first vertical direction W1. For example, when the saddle riding vehicle 1B turns to the left, the saddle riding vehicle 1B tilts from an upright position to the left. When the saddle riding vehicle 1B tilts from an upright position to the left, the jetting direction Rb changes from right and horizontal to right and upward. When the saddle riding vehicle 1B tilts from an upright position to the left, the jetting direction Rb changes from the second horizontal direction S2 to a direction that combines the second horizontal direction S2 and the first vertical direction W1. In summary, when the saddle riding type vehicle 1B turns around a curved road Cr, the exhaust port 73B injects the exhaust gas in the same direction as the direction of the centrifugal force E. Therefore, when the saddle riding type vehicle 1B turns around a curved road Cr, it is easy for the first force to offset at least a portion of the centrifugal force E. [Example]

[0394] Next, a saddle-ride type vehicle 1C according to a fourth embodiment of the present invention will be described. The same components as those of the saddle-ride type vehicle 1 according to the first embodiment will be given the same reference numerals, and only the different components will be described in detail.

[0395] <Exhaust system configuration> Fig. 33 is a perspective view of an exhaust device 29C according to Example 4. Fig. 34 is a vertical cross-sectional view of the exhaust device 29C as seen from the rear of the vehicle.

[0396] The saddle-ride type vehicle 1C includes an exhaust device 29C. The exhaust device 29C is similar to the exhaust device 29 of the first embodiment. The exhaust device 29C has an exhaust port 71 and an exhaust port 73. The exhaust port 73 injects exhaust gas in an injection direction Rc. Although not shown, the exhaust device 29C includes an on-off valve 58.

[0397] The exhaust device 29C is movable relative to the body frame 3. For example, the exhaust device 29C is rotatable relative to the body frame 3.

[0398] The saddle-ride type vehicle 1C includes a movement mechanism 96. The movement mechanism 96 changes the jetting direction Rc. The movement mechanism 96 changes the jetting direction Rc relative to the body frame 3. For example, the movement mechanism 96 changes the angle between the jetting direction Rc and the vertical direction Z.

[0399] For example, the movement mechanism 96 rotates the exhaust device 29C. For example, the movement mechanism 96 rotates the exhaust device 29C around an axis J. The axis J is parallel to the front-rear direction X. The axis J is disposed at a position eccentric to the exhaust port 73. The axis J passes through the center of the exhaust port 71, for example.

[0400] For example, the movement mechanism 96 is supported by the body frame 3. The movement mechanism 96 is connected to the exhaust device 29C, for example.

[0401] For example, the movement mechanism 96 includes at least one of an actuator and a motor.

[0402] <Control system configuration> The control system of the saddle-ride type vehicle 1C will be described.

[0403] FIG. 35 is a functional block diagram showing a control system of a saddle-ride type vehicle 1C according to the fourth embodiment.

[0404] The straddle-type vehicle 1C includes an ECU 75C. The ECU 75C controls the on-off valve 58 based on the detection result of the IMU 81. The ECU 75C controls the movement mechanism 96 based on the detection result of the IMU 81.

[0405] Specifically, when the inclination angle V1 is equal to or greater than a predetermined value L1, the ECU 75C causes the exhaust device 29C to enter a lateral injection state using the on-off valve 58. When the inclination angle V2 is equal to or greater than a predetermined value L2, the ECU 75C causes the exhaust device 29C to enter a lateral injection state using the on-off valve 58.

[0406] When the tilt angle V1 is equal to or greater than the predetermined value L1, the ECU 75C causes the movement mechanism 96 to direct the injection direction Rc to the right.

[0407] When the tilt angle V2 is equal to or greater than the predetermined value L2, the ECU 75C causes the movement mechanism 96 to direct the injection direction Rc to the left.

[0408] When the inclination angle V1 is less than the predetermined value L1 and the inclination angle V2 is less than the predetermined value L2, the ECU 75C causes the on-off valve 58 to put the exhaust device 29C into the rear injection state.

[0409] The ECU 75C is an example of a movement mechanism control unit in the present invention. The ECU 75C is also an example of a main valve control unit in the present invention. The ECU 75C is also an example of a first valve control unit in the present invention.

[0410] <Example of the movement of saddle-type vehicle 1C going straight> The straddle-type vehicle 1C assumes an upright position. Based on the detection result of the IMU 81, the ECU 75C switches the exhaust device 29C to the rearward injection state using the on-off valve 58. The exhaust device 29C enters the rearward injection state. The exhaust port 71 injects exhaust gas rearward.

[0411] <Example of saddle-type vehicle 1C turning left> The operation of the saddle riding type vehicle 1C turning left will be described.

[0412] 36 and 37 are rear views of the saddle riding type vehicle 1C. For ease of explanation, the exhaust device 29C is omitted from Fig. 37.

[0413] The centrifugal force E acts to the right on the saddle-type vehicle 1C.

[0414] The saddle-type vehicle 1C tilts to the left.

[0415] Based on the detection result of the IMU 81, the ECU 75C switches the exhaust device 29C to the lateral injection state using the on-off valve 58. Based on the detection result of the IMU 81, the ECU 75C changes the injection direction Rc to the right using the movement mechanism 96.

[0416] The exhaust device 29C is in a lateral injection state. The exhaust port 73 injects exhaust gas, causing a first force to act on the saddle riding type vehicle 1C. The first force offsets at least a part of the centrifugal force E.

[0417] Specifically, the exhaust port 73 injects the exhaust gas in the same direction as the direction of the centrifugal force E. That is, the exhaust port 73 injects the exhaust gas to the right.

[0418] For example, the exhaust port 73 injects the exhaust gas horizontally to the right. For example, the exhaust port 73 injects the exhaust gas in a second horizontal direction S2.

[0419] Alternatively, exhaust outlet 73 may inject exhaust gases downward and to the right.Exhaust outlet 73 may inject exhaust gases upward and to the right.

[0420] The amount of rotation of the exhaust device 29C by the movement mechanism 96 may vary depending on the tilt angle V1. For example, regardless of the tilt angle V1, the movement mechanism 96 keeps the angle between the horizontal direction S and the injection direction Rc constant. For example, while the saddle riding type vehicle 1C is turning left on a curved road Cr, the movement mechanism 96 keeps the jetting direction Rc in the second horizontal direction S2.

[0421] Alternatively, the amount of rotation of the exhaust device 29C by the movement mechanism 96 may be constant regardless of the inclination angle V1.

[0422] Jet H flows to the right from starting point Ce.

[0423] The first force is, for example, a reaction force F of the jet flow H. The reaction force F acts on the saddle riding type vehicle 1C in a leftward direction. The reaction force F acts on the saddle riding type vehicle 1C in a direction opposite to that of the centrifugal force E. The reaction force F cancels out at least a portion of the centrifugal force E.

[0424] The first component force F1 has a first horizontal direction S1. The first component force F1 has a direction opposite to the direction of the centrifugal force E. Therefore, the first component force F1 cancels out at least a portion of the centrifugal force E.

[0425] When the jetting direction Rc is the second horizontal direction S2, the reaction force F is composed of only the first component force F1 and does not include the second component force F2. Therefore, the first component force F1 has a magnitude equal to that of the reaction force F. In other words, the first component force F1 is maximized.

[0426] When the movement mechanism 96 maintains the jet direction Rc in the second horizontal direction S2, the first component force F1 is always at its maximum throughout the period in which the saddle riding vehicle 1C is turning left. Therefore, throughout the period in which the saddle riding vehicle 1C is turning left on the curved road Cr, the first component force F1 continues to offset a larger portion of the centrifugal force E. Throughout the period in which the saddle riding vehicle 1C is turning left on the curved road Cr, the reaction force F continues to offset the centrifugal force E more effectively.

[0427] <Example of saddle-type vehicle 1C turning right> Next, the operation of the saddle riding type vehicle 1C turning right will be described.

[0428] 38 and 39 are rear views of the saddle riding type vehicle 1C. For the sake of convenience, the exhaust device 29C is not shown in Fig. 39.

[0429] The centrifugal force E acts leftward on the saddle-type vehicle 1C.

[0430] The saddle-type vehicle 1C tilts to the right.

[0431] Based on the detection result of the IMU 81, the ECU 75C switches the exhaust device 29C to the lateral injection state using the on-off valve 58. Based on the detection result of the IMU 81, the ECU 75C changes the injection direction Rc to the left using the movement mechanism 96.

[0432] The exhaust device 29C is in a lateral injection state. The exhaust port 73 injects exhaust gas, causing a first force to act on the saddle riding type vehicle 1C. The first force offsets at least a part of the centrifugal force E.

[0433] Specifically, the exhaust port 73 injects the exhaust gas in the same direction as the direction of the centrifugal force E. That is, the exhaust port 73 injects the exhaust gas to the left.

[0434] For example, the exhaust port 73 injects the exhaust gas horizontally to the left. For example, the exhaust port 73 injects the exhaust gas in a first horizontal direction S1.

[0435] Alternatively, exhaust outlet 73 may inject exhaust gases downward and to the left.Exhaust outlet 73 may inject exhaust gases upward and to the left.

[0436] The amount of rotation of the exhaust device 29C by the movement mechanism 96 may vary depending on the inclination angle V2. For example, regardless of the inclination angle V2, the movement mechanism 96 keeps the angle between the horizontal direction S and the injection direction Rc constant. For example, throughout the period when the saddle riding type vehicle 1C is turning right around a curved road Cr, the movement mechanism 96 keeps the injection direction Rc in the first horizontal direction S1.

[0437] Alternatively, the amount of rotation of the exhaust device 29C by the movement mechanism 96 may be constant regardless of the inclination angle V2.

[0438] Jet H flows leftward from starting point Ce.

[0439] The first force is, for example, a reaction force F of the jet flow H. The reaction force F acts in a rightward direction on the saddle riding type vehicle 1C. The reaction force F acts in a direction opposite to the centrifugal force E on the saddle riding type vehicle 1C. The reaction force F cancels out at least a portion of the centrifugal force E.

[0440] The first component force F1 has a second horizontal direction S2. The first component force F1 has a direction opposite to the direction of the centrifugal force E. Therefore, the first component force F1 cancels out at least a portion of the centrifugal force E.

[0441] When the jetting direction Rc is the first horizontal direction S1, the reaction force F is composed of only the first component force F1 and does not include the second component force F2. Therefore, the first component force F1 has a magnitude equal to that of the reaction force F. In other words, the first component force F1 is maximized.

[0442] When the movement mechanism 96 maintains the jet direction Rc in the first horizontal direction S1, the first component force F1 is always at a maximum throughout the period when the saddle riding type vehicle 1C is turning right. Therefore, the first component force F1 continues to offset a larger portion of the centrifugal force E throughout the period in which the saddle riding type vehicle 1C turns right around the curved road Cr while spraying exhaust gas in the first horizontal direction S1. As long as the saddle riding type vehicle 1C is turning right on the curved road Cr, the reaction force F continues to offset the centrifugal force E more effectively.

[0443] <Effects of Example 4> The saddle-riding type vehicle 1C according to the fourth embodiment has the same effects as the saddle-riding type vehicle 1 according to the first embodiment. For example, the saddle-riding type vehicle 1C includes an exhaust device 29C. The exhaust device 29C includes an exhaust port 73. The exhaust port 73 injects exhaust gas to apply a first force to the saddle-riding type vehicle 1C. When the saddle-riding type vehicle 1C turns a curved road Cr, the first force offsets at least a portion of the centrifugal force E acting on the saddle-riding type vehicle 1C. The first force is, for example, a reaction force F. Therefore, it is possible to provide a saddle-riding type vehicle 1C with good turning performance.

[0444] Furthermore, the saddle riding type vehicle 1C according to the fourth embodiment has the following effects.

[0445] The saddle riding type vehicle 1C includes an IMU 81, a movement mechanism 96, and an ECU 75C. The IMU 81 detects the tilt angle V1 of the saddle riding type vehicle 1C to the left and the tilt angle V2 of the saddle riding type vehicle 1C to the right. The movement mechanism 96 changes the injection direction Rc of the exhaust gas from the exhaust port 73. The ECU 75C controls the movement mechanism 96 based on the detection result of the IMU 81. Therefore, it is easy to change the injection direction Rc in accordance with the tilt angles V1 and V2. Therefore, when the saddle riding type vehicle 1C turns a curved road Cr, it is easy for the first force to cancel out at least a portion of the centrifugal force E.

[0446] The movement mechanism 96 rotates the exhaust device 29C, so that it is easy to change the injection direction Rc.

[0447] As described above, the ECU 75C controls the movement mechanism 96 based on the detection results of the IMU 81. Therefore, it is easy to adjust the injection direction Rc to the optimal direction. The optimal direction is, for example, the injection direction Rc for increasing the first component force F1. The optimal direction is, for example, the injection direction Rc for maximizing the first component force F1. Therefore, it is easy to increase the first component force F1 regardless of the inclination angles V1 and V2. It is also easy to maximize the first component force F1 regardless of the inclination angles V1 and V2. Therefore, it is possible to provide a saddle-ride type vehicle 1C that has good turning performance regardless of the inclination angles V1 and V2. [Example]

[0448] Next, a saddle-ride type vehicle 1D according to a fifth embodiment of the present invention will be described. The same components as those of the saddle-ride type vehicle 1 according to the first embodiment will be given the same reference numerals, and only the different components will be described in detail.

[0449] <Exhaust system configuration> FIG. 40 is a right side view of a saddle riding type vehicle 1D according to the fifth embodiment.

[0450] The straddle-type vehicle 1D is provided with an exhaust system 29D.

[0451] The exhaust device 29D is fixed to the body frame 3. The exhaust device 29D is immovable relative to the body frame 3. The exhaust device 29D is immovable relative to the body frame 3.

[0452] The exhaust device 29D includes an exhaust port 99. The exhaust port 99 injects exhaust gas. The exhaust port 99 injects exhaust gas from the inside of the exhaust device 29D to the outside of the exhaust device 29D.

[0453] The exhaust port 99 is configured to discharge exhaust gases upward. For example, the exhaust port 99 is configured to discharge exhaust gases rearward and upward in a side view of the vehicle.

[0454] For example, the exhaust port 99 injects exhaust gases upward. The exhaust port 99 injects exhaust gases upward and rearward.

[0455] The exhaust port 99 is disposed above the exhaust port 71 .

[0456] The exhaust port 99 is disposed above the rear axle 47. The exhaust port 99 is disposed above the center of rotation of the rear wheel 49.

[0457] The exhaust port 99 is an example of a second exhaust port according to the present invention.

[0458] Fig. 41 is a perspective view of an exhaust device 29D according to a fifth embodiment. Fig. 42 is a vertical cross-sectional view of the exhaust device 29D as seen from the side of the vehicle. Fig. 43 is a vertical cross-sectional view of the exhaust device 29D as seen from the rear of the vehicle.

[0459] The exhaust device 29D includes a third branch pipe 97 in addition to the junction pipe 55, the first branch pipe 56, and the second branch pipe 57. The junction pipe 55 is connected to the first branch pipe 56, the second branch pipe 57, and the third branch pipe 97. The junction pipe 55 branches into the first branch pipe 56, the second branch pipe 57, and the third branch pipe 97.

[0460] Specifically, branch portion 60 of junction pipe 55 is connected to one end of first branch pipe 56, one end of second branch pipe 57, and one end of third branch pipe 97. In other words, exhaust device 29D has a structure in which junction pipe 55 is branched at branch portion 60 into first branch pipe 56, second branch pipe 57, and third branch pipe 97.

[0461] The third branch pipe 97 extends rearward and upward from the branching portion 60 in a side view of the vehicle. That is, the third branch pipe 97 is disposed above the first branch pipe 56.

[0462] An exhaust port 99 is provided at the other end of the third branch pipe 97. The exhaust port 99 discharges the exhaust gas that has flowed from the junction pipe 55 to the third branch pipe 97 to the outside of the exhaust device 29D.

[0463] The diameter of the third branch pipe 97 is configured to be smaller than the diameter of the first branch pipe 56 .

[0464] The exhaust port 99 is smaller than the exhaust port 71 .

[0465] For example, the exhaust port 99 has a diameter smaller than the diameter of the exhaust port 71 .

[0466] The exhaust device 29D includes an on-off valve 95, an on-off valve 101, and an on-off valve 103. The on-off valve 95 opens and closes the exhaust port 71. The on-off valve 101 opens and closes the exhaust port 73. The on-off valve 103 opens and closes the exhaust port 99.

[0467] The on-off valve 95 may be capable of adjusting the opening degree of the exhaust port 71. The on-off valve 101 may be capable of adjusting the opening degree of the exhaust port 73. The on-off valve 103 may be capable of adjusting the opening degree of the exhaust port 99.

[0468] The on-off valve 95 is disposed inside the first branch pipe 56. The on-off valve 101 is disposed inside the second branch pipe 57. The on-off valve 103 is disposed inside the third branch pipe 97.

[0469] The on-off valves 95, 101, 103 switch the exhaust device 29D between a side injection state, a rear injection state, and an upward injection state.

[0470] Figure 44 shows exhaust device 29D in the lateral injection state. When exhaust device 29D is in the lateral injection state, exhaust device 29D injects exhaust gas from exhaust port 73. On-off valve 95 closes exhaust port 71, on-off valve 101 opens exhaust port 73, and on-off valve 103 closes exhaust port 99. Figure 44 schematically shows exhaust gas flow R1 in the lateral injection state.

[0471] Figure 45 shows exhaust device 29D in the rear injection state. When exhaust device 29D is in the rear injection state, exhaust device 29D injects exhaust gas from exhaust port 71. On-off valve 95 opens exhaust port 71, on-off valve 101 closes exhaust port 73, and on-off valve 103 closes exhaust port 99. Figure 45 schematically shows exhaust gas flow R2 in the rear injection state.

[0472] Figure 46 shows exhaust device 29D in the upward injection state. When exhaust device 29D is in the upward injection state, exhaust device 29D injects exhaust gas from exhaust port 99. On-off valve 95 closes exhaust port 71, on-off valve 101 closes exhaust port 73, and on-off valve 103 opens exhaust port 99. Figure 46 schematically shows exhaust gas flow R3 in the upward injection state.

[0473] The on-off valves 95, 101, and 103 are, for example, electrically operated valves.

[0474] The on-off valve 95 is an example of a main valve in the present invention. The on-off valve 101 is an example of a first valve in the present invention.

[0475] <Control system configuration> The control system of the saddle-ride type vehicle 1D will now be described.

[0476] FIG. 47 is a functional block diagram showing a control system of a saddle-ride type vehicle 1D according to the fifth embodiment.

[0477] The saddle riding type vehicle 1D is equipped with an ECU 75D. An IMU 81 detects inclination angles V1, V2 and a pitch angle. The pitch angle is the angle of the saddle riding type vehicle 1D around the width direction Y. The ECU 75D controls the on-off valve 95, the on-off valve 101 and the on-off valve 103 based on the detection results of the IMU 81. The ECU 75D switches the exhaust device 29D between a side injection state, a rear injection state and an upward injection state based on the inclination angles V1, V2 and the pitch angle.

[0478] The saddle riding type vehicle 1D includes a storage unit 79D. For example, the storage unit 79D stores a predetermined value L3 in addition to the predetermined values ​​L1 and L2. The predetermined value L3 is a threshold value for the pitch angle. For convenience, the pitch angle will be referred to as a "pitch angle V3."

[0479] When the pitch angle V3 is less than the predetermined value L3, the front wheels 24 are considered to be in a proper position. When the front wheels 24 are in a proper position, the front wheels 24 are in proper contact with the road surface G.

[0480] When the pitch angle V3 is equal to or greater than the predetermined value L3, the front wheels 24 are deemed to be at a higher position than appropriate. When the front wheels 24 are at a higher position than appropriate, the front wheels 24 may not be in proper contact with the road surface G. For example, the front wheels 24 are separated from the road surface G and floating above the road surface G. Alternatively, there is a high possibility that the front wheels 24 will float above the road surface G in the near future.

[0481] When the front wheel 24 lifts off the road surface G, for example, when driving on a circuit, the saddle riding type vehicle 1D is in a wheelie. Therefore, when the pitch angle V3 is equal to or greater than the predetermined value L3, it is considered that the saddle riding type vehicle 1D is in a wheelie or that there is a high possibility that the saddle riding type vehicle 1D will perform a wheelie in the near future.

[0482] For example, the ECU 75D switches the exhaust device 29D between a rear injection state, a side injection state, and an upward injection state based on the inclination angles V1 and V2, the pitch angle V3, and the predetermined values ​​L1-L3.

[0483] Specifically, when the inclination angle V1 is equal to or greater than a predetermined value L1, the ECU 75D switches the exhaust device 29D to the lateral injection state. When the inclination angle V2 is equal to or greater than the predetermined value L2, the ECU 75D switches the exhaust device 29D to the lateral injection state.

[0484] When the tilt angle V1 is less than the predetermined value L1, the tilt angle V2 is less than the predetermined value L2, and the pitch angle V3 is less than the predetermined value L3, the ECU 75D switches the exhaust device 29D to the rear injection state.

[0485] When the inclination angle V1 is less than the predetermined value L1, the inclination angle V2 is less than the predetermined value L2, and the pitch angle V3 is equal to or greater than the predetermined value L3, the ECU 75D switches the exhaust device 29D to the upward injection state.

[0486] Alternatively, the memory unit 79D may store a lean condition, an upright condition, and a wheelie condition. The ECU 75 may control the on-off valve 58 based on the lean angles V1 and V2, the lean condition, the upright condition, and the wheelie condition. The lean condition, the upright condition, and the wheelie condition are defined by predetermined values ​​L1, L2, and L3.

[0487] The tilt condition is as described in Example 1. When the tilt condition is met, the ECU 75 switches the exhaust device 29D to the lateral injection state.

[0488] The upright condition is that the first, second, and fifth conditions are met. The first condition is that the tilt angle V1 is less than a predetermined value L1. The second condition is that the tilt angle V2 is less than a predetermined value L2. The fifth condition is that the pitch angle V3 is less than a predetermined value L3. If the upright condition is met, the ECU 75 switches the exhaust device 29D to the rear injection state.

[0489] The wheelie conditions are satisfied when the first, second, and sixth conditions are met. The first condition is that the tilt angle V1 is less than a predetermined value L1. The second condition is that the tilt angle V2 is less than a predetermined value L2. The sixth condition is that the pitch angle V3 is equal to or greater than a predetermined value L3. When the wheelie conditions are met, the ECU 75 switches the exhaust device 29D to an upward injection state.

[0490] <Example of the movement of a saddle-type vehicle 1D turning> The operation of the saddle riding type vehicle 1D when turning will now be described.

[0491] FIG. 48 is a rear view of the saddle riding type vehicle 1D.

[0492] A centrifugal force E acts on the saddle-type vehicle 1D.

[0493] The saddle-type vehicle 1D tilts.

[0494] Based on the detection result of the IMU 81, the ECU 75D switches the exhaust device 29D to the lateral injection state.

[0495] The exhaust port 73 injects exhaust gas to apply a first force to the saddle riding type vehicle 1D. Specifically, the exhaust port 73 injects the exhaust gas in the same direction as the centrifugal force E. The first force is, for example, a reaction force F of the jet flow H. The first force cancels out at least a portion of the centrifugal force E.

[0496] <Example of the movement of a saddle-type vehicle 1D going straight> Next, the operation of the saddle riding type vehicle 1D moving straight will be described.

[0497] The saddle-type vehicle 1D takes an upright position.

[0498] Based on the detection result of the IMU 81, the ECU 75C switches the exhaust device 29D between the rear injection state and the up injection state.

[0499] The tilt angle V1 is less than the predetermined value L1, and the tilt angle V2 is less than the predetermined value L2. Therefore, when the pitch angle V3 is less than the predetermined value L3, the ECU 75D switches the exhaust device 29D to the rear injection state. When the pitch angle V3 is equal to or greater than the predetermined value L3, the ECU 75D switches the exhaust device 29D to the upward injection state.

[0500] Alternatively, when the upright condition is met, the ECU 75D may switch the exhaust device 29D to a rearward injection state. When the wheelie condition is met, the ECU 75D may switch the exhaust device 29D to an upward injection state.

[0501] Please refer to Figure 40. When exhaust device 29D is in the rearward injection state, exhaust port 71 injects exhaust gases.

[0502] 49, 50, and 51 are right side views of a saddle riding type vehicle 1D. For the sake of convenience, an exhaust device 29D is omitted from Fig. 50 and Fig. 51.

[0503] When the exhaust device 29D is in the upward injection state, the exhaust port 99 injects exhaust gas. The exhaust port 99 then applies a second force to the saddle riding type vehicle 1D. The second force acts in a direction that prevents the front wheel 24 from lifting off the road surface G.

[0504] Specifically, the exhaust port 99 injects the exhaust gas upward in the vertical direction Z. For example, the exhaust port 99 injects the exhaust gas upward and rearward.

[0505] The straddle-type vehicle 1D is in an upright position, and therefore the direction in which the exhaust gas is ejected from the exhaust port 99 includes a component in the first vertical direction W1 described above.

[0506] 49 and 50 schematically show the jet Hb. The jet Hb is formed by exhaust gas injected from the exhaust port 99. The jet Hb is generated at the exhaust port 99. For example, the jet Hb is generated at a starting point Ch corresponding to the center of the exhaust port 99. The jet Hb is generated outside the exhaust device 29D. The jet H is generated outside the saddle-ride type vehicle 1D.

[0507] See FIG. 50. The second force is, for example, a reaction force Fb of the jet Hb. When the jet Hb is generated, the reaction force Fb is generated. The reaction force Fb has a direction opposite to that of the jet Hb. The reaction force Fb acts on the exhaust device 29D. The reaction force Fb acts on the saddle-ride type vehicle 1D. The exhaust port 99 causes the reaction force F to act on the saddle-ride type vehicle 1D.

[0508] The jet Hb flows upward from the starting point Ch. For example, the jet Hb flows upward and backward.

[0509] The reaction force Fb is directed downward from the starting point Ch. For example, the reaction force is directed downward and forward.

[0510] The reaction force Fb acts downward on the saddle riding type vehicle 1D. For example, the reaction force Fb acts downward and forward on the saddle riding type vehicle 1D.

[0511] Therefore, the reaction force Fb acts in a direction pressing the front wheel 24 against the road surface G. The reaction force Fb acts in a direction preventing the front wheel 24 from rising upward from an appropriate position. The reaction force Fb acts in a direction preventing the front wheel 24 from lifting upward from the road surface G. The reaction force Fb acts in a direction preventing the saddle riding type vehicle 1D from performing a wheelie when driving on a circuit, for example.

[0512] The relationship between the second force and the front wheels 24 will now be described in more detail.

[0513] The second force includes a third component force F3. The third component force F3 is a component of the reaction force Fb in the vertical direction Z. The third component force F3 acts on the saddle-riding type vehicle 1.

[0514] The third component force F3 is directed downward. The third component force F3 acts downward on the saddle riding type vehicle 1D. Therefore, the third component force F3 presses the front wheel 24 against the road surface G. Therefore, the third component force F3 acts in a direction that prevents the front wheel 24 from lifting up above the road surface G.

[0515] See FIG. 51. The second force includes a first moment M1. The first moment M1 is generated by the reaction force Fb. The first moment M1 acts on the starting point ch. The first moment M1 acts on the exhaust device 29D. The first moment M1 acts on the saddle-type vehicle 1D. Specifically, the first moment M1 is a force that rotates the starting point ch around the rear contact point T. The rear contact point T is the contact point between the rear wheel 49 and the road surface G.

[0516] The first moment M1 acts in a rightward (clockwise) direction with the rear contact point T as a fulcrum when viewed from the right side of the saddle riding type vehicle 1D. Therefore, the first moment M1 acts in a direction that presses the front wheel 24 against the road surface G. In other words, the first moment M1 moves the front wheel 24 downward with the rear contact point T as a fulcrum. Therefore, the first moment M1 acts in a direction that prevents the front wheel 24 from lifting up from the road surface G.

[0517] For example, when the front wheel 24 lifts off the road surface G, a second moment M2 may act on the saddle-riding vehicle 1. When viewed from the right side of the saddle-riding vehicle 1, the second moment M2 acts on the front wheel 24 in a counterclockwise direction with the rear contact point T as a fulcrum. The first moment M1 is directed in the opposite direction to the second moment M2. Therefore, the first moment M1 cancels out the second moment M2. Therefore, the first moment M1 acts in a direction that prevents the front wheel 24 from lifting off the road surface G.

[0518] Figure 51 shows the distance Ds, the line Lw, the angle N, and the fifth component force F5. The distance Ds is the distance from the rear contact point T to the starting point Ce. The line Lw is an imaginary line connecting the rear contact point T and the starting point Ce. The angle N is the angle between the direction of the reaction force Fb and the line Lw. The fifth component force F5 is the component of the reaction force Fb in a direction perpendicular to the line Lw when viewed from the side of the vehicle. The magnitude L5 of the fifth component force F5 is calculated using the reaction force Fb and the angle N using the following formula (A). L5=Fb·(sinN)……(A)

[0519] As shown in the above formula (A), the closer the angle N is to 90 degrees, the larger the fifth component force F5 becomes.

[0520] The magnitude of the first moment M1 corresponds to the product of the magnitude L5 of the fifth component of force F5 and the distance Ds. Therefore, the closer the angle N is to 90 degrees, the stronger the first moment M1 becomes. Furthermore, the larger the distance Ds becomes, the stronger the first moment M1 becomes.

[0521] For example, the higher the position of the exhaust port 99, the greater the distance Ds. Therefore, by positioning the exhaust port 99 farther from the road surface G, the first moment M1 can be increased. By positioning the exhaust port 99 farther from the road surface G, the first moment M1 can be increased. In order to increase the first moment M1, it is preferable to position the exhaust port 99 higher than the rear axle 47, and it is more preferable to position the exhaust port 99 higher than the upper end of the rear wheel 49. By increasing the first moment M1, it is possible to further prevent the saddle-riding type vehicle 1 from performing a wheelie, for example, when driving on a circuit.

[0522] <Effects of Example 5> The saddle-riding type vehicle 1D according to the fifth embodiment has the same effects as the saddle-riding type vehicle 1 according to the first embodiment. For example, the saddle-riding type vehicle 1D is provided with an exhaust device 29D. The exhaust device 29D is provided with an exhaust port 73. The exhaust port 73 injects exhaust gas to apply a first force to the saddle-riding type vehicle 1D. When the saddle-riding type vehicle 1D turns on a curved road Cr, the first force cancels out at least a portion of the centrifugal force E acting on the saddle-riding type vehicle 1D. The first force is, for example, a reaction force F of the jet flow H. Therefore, it is possible to provide a saddle-riding type vehicle 1D with good turning performance.

[0523] Furthermore, the straddle-type vehicle 1D according to the fifth embodiment has the following advantages.

[0524] The saddle riding type vehicle 1D has a front wheel 24 and a rear wheel 49. The exhaust device 29D has an exhaust port 99. The exhaust port 99 injects exhaust gas to apply a second force to the front wheel 24. The second force acts in a direction that prevents the front wheel 24 from lifting off the road surface G. In other words, the second force acts in a direction that presses the front wheel 24 against the road surface G. Therefore, the exhaust device 29D can prevent the front wheel 24 from lifting off the road surface G. Therefore, when traveling on a circuit, for example, the second force acts in a direction that makes the saddle riding type vehicle 1D less likely to perform a wheelie. Even when the saddle riding type vehicle 1D suddenly accelerates when traveling on a circuit, for example, the second force acts in a direction that makes the saddle riding type vehicle 1D less likely to perform a wheelie. As a result, the acceleration performance of the saddle riding type vehicle 1D can be easily improved.

[0525] Generally, when a driver of a saddle-type vehicle suddenly opens the accelerator pedal or suddenly engages the clutch while driving on a circuit, for example, the saddle-type vehicle will suddenly accelerate. Conventionally, exhaust systems do not apply a second force to the saddle-type vehicle. Therefore, when a saddle-type vehicle suddenly accelerates while driving on a circuit, for example, the front wheel is likely to lift off the road surface, causing the saddle-type vehicle to perform a wheelie. Therefore, conventional saddle-type vehicles require the driver to carefully operate the accelerator and clutch.

[0526] In the saddle-riding vehicle 1D of the fifth embodiment, the exhaust port 99 injects exhaust gas to apply a second force to the saddle-riding vehicle 1D. The second force acts in a direction that prevents the front wheel 24 from lifting off the road surface G. Therefore, even if the saddle-riding vehicle 1D suddenly accelerates while driving on a circuit, for example, the second force acts in a direction that makes it difficult for the front wheel 24 to lift off the road surface G. Even if the saddle-riding vehicle 1D suddenly accelerates while driving on a circuit, for example, the second force acts in a direction that makes it difficult for the saddle-riding vehicle 1D to perform a wheelie. Therefore, in the saddle-riding vehicle 1D, operation of the accelerator and clutch is assisted. Therefore, it is easier for the driver to operate the accelerator and clutch in the saddle-riding vehicle 1D.

[0527] In the saddle-riding vehicle 1D according to the fifth embodiment, exhaust gas is ejected from the exhaust port 99 of the exhaust device 29D to generate a force that acts in a direction that presses the front wheel 24 downward. In other words, ejecting exhaust gas from the exhaust port 99 prevents the saddle-riding vehicle 1D from performing a wheelie. A device that discharges exhaust gas is a configuration that is generally provided in a saddle-riding vehicle 1D. Therefore, there is no need to install a new device, in addition to the exhaust device 29D, in the saddle-riding vehicle 1D for generating a force that acts in a direction that presses the front wheel 24 downward. This eliminates the need to add a new device to the saddle-riding vehicle 1D to generate a force that acts in a direction that presses the front wheel 24 downward. This makes it possible to prevent the saddle-riding vehicle 1D from performing a wheelie while driving on a circuit, for example, without increasing the complexity of the saddle-riding vehicle 1D. In other words, a saddle-riding vehicle 1D that can prevent a wheelie while driving on a circuit, for example, can be realized at a lower cost. Furthermore, by effectively utilizing the exhaust gas that is inevitably generated when driving the saddle-riding vehicle 1D, it is possible to prevent the saddle-riding vehicle 1D from performing a wheelie while driving on a circuit, for example. That is, the exhaust device 29D can effectively utilize exhaust gas to contribute to posture control of the saddle riding type vehicle 1D. Therefore, it is possible to realize a saddle riding type vehicle 1D that is environmentally friendly and can prevent wheelies from occurring when driving on a circuit, for example.

[0528] The second force is a reaction force Fb of the jet flow Hb of exhaust gas ejected from the exhaust port 99. The second force has a direction opposite to the direction of the jet flow of exhaust gas ejected from the exhaust port 99. For this reason, by ejecting exhaust gas from the exhaust port 99, it is easy for the exhaust port 99 to apply the second force to the saddle riding type vehicle 1D.

[0529] The exhaust port 99 injects the exhaust gas upward. Therefore, the second force acts downward on the saddle riding type vehicle 1D. Therefore, the second force acts in a direction that prevents the front wheel 24 from lifting up from the road surface G.

[0530] The second force includes a third component force F3. The third component force F3 is directed downward. Therefore, the second force acts in a direction that prevents the front wheels 24 from lifting off the road surface G.

[0531] The second force includes a first moment M1. The first moment M1 acts on the saddle riding type vehicle 1D in a clockwise direction around the rear contact point T in a right side view of the saddle riding type vehicle 1D. Therefore, the second force acts in a direction that prevents the front wheel 24 from lifting off the road surface G.

[0532] The exhaust port 99 is smaller than the exhaust port 71. Therefore, it is easy to increase the velocity of the exhaust gas injected from the exhaust port 99. As the velocity of the exhaust gas injected from the exhaust port 99 increases, the second force increases. Therefore, it is easy to apply the second force in a direction that prevents the front wheels 24 from lifting off the road surface G.

[0533] The exhaust port 99 is disposed higher than the exhaust port 71. Therefore, the distance Ds is relatively long. For example, the distance Ds is longer than the distance from the rear contact point T to the exhaust port 71. Therefore, the first moment M1 is relatively large. Therefore, it is easy to apply the first moment M1 in a direction that prevents the front wheel 24 from lifting off the road surface G.

[0534] The present invention is not limited to the above-described embodiment, but can be modified as follows.

[0535] (1) In the first embodiment, the exhaust device 29 is disposed to the right of the rear wheel 49. However, this is not limitative. For example, the exhaust device 29 may be disposed to the left of the rear wheel 49. Furthermore, the exhaust device 29 may be disposed in a position overlapping with the rear wheel 49 when viewed from the front of the vehicle.

[0536] As with the exhaust device 29 in the first embodiment, the positions of the exhaust devices 29A-29D in the second to fifth embodiments may be changed.

[0537] (2) In Examples 1-5, the exhaust port 71 is configured to discharge exhaust gas rearward in the fore-and-aft direction X. That is, the exhaust port 71 is configured to discharge exhaust gas in a direction parallel to the fore-and-aft direction X, which is a horizontal direction. However, this is not limited to this. As an example, the exhaust port 71 may be configured to discharge exhaust gas rearward and upward in a side view of the vehicle. The exhaust port 71 may also be configured to discharge exhaust gas rearward and downward in a side view of the vehicle. Furthermore, the exhaust port 71 may discharge exhaust gas downward in the up-down direction Z. The exhaust port 71 may also discharge exhaust gas to the left or right in the width direction Y.

[0538] (3) In the second embodiment, the number of left exhaust ports 83A provided in the exhaust device 29A was one. However, this is not limited to this. The number of left exhaust ports 83A may be multiple. Similarly, the number of left exhaust ports 83B may be multiple. The number of right exhaust ports 85A may be multiple. The number of right exhaust ports 85B may be multiple.

[0539] Fig. 52 is a vertical cross-sectional view of an exhaust device 29E according to a modified example, as seen from the rear of the vehicle. Figs. 53 and 54 are rear views of a saddle-ride type vehicle 1E according to a modified example. The same components as those in Examples 1-5 are assigned the same reference numerals, and different components will be described in detail.

[0540] The saddle riding type vehicle 1E includes an exhaust device 29E. The exhaust device 29E includes an exhaust port 73C. The exhaust port 73C includes a left exhaust port 83C and a right exhaust port 85C. The left exhaust port 83C includes a plurality of left small exhaust ports 84p, 84s. The right exhaust port 85 includes a plurality of right small exhaust ports 86p, 86s.

[0541] The exhaust port 73C is an example of a first exhaust port defined in the present invention.

[0542] The exhaust device 29E includes a left branch pipe 87p, a left branch pipe 87s, a right branch pipe 89p, and a right branch pipe 89s. One end of each of the left branch pipe 87p, the left branch pipe 87s, the right branch pipe 89p, and the right branch pipe 89s is connected to the branching portion 60.

[0543] The left small exhaust port 84p is provided at the other end of the left branch pipe 87p. The left small exhaust port 84s is provided at the other end of the left branch pipe 87s. The right small exhaust port 86p is provided at the other end of the right branch pipe 89p. The right small exhaust port 86s is provided at the other end of the right branch pipe 89s.

[0544] When the saddle riding type vehicle 1E is in an upright position, the left small exhaust ports 84p, 84s each face left. More specifically, the spray direction of the left small exhaust port 84p is slightly different from the spray direction of the left small exhaust port 84s. For example, when the saddle riding type vehicle 1E is in an upright position, the spray direction of the left small exhaust port 84p is relatively close to horizontal. When the saddle riding type vehicle 1E is in an upright position, the spray direction of the left small exhaust port 84s is relatively close to a downward direction.

[0545] When the saddle riding type vehicle 1E is in an upright position, the right small exhaust ports 86p, 86s each face to the right. More specifically, the spray direction of the right small exhaust port 86p is slightly different from the spray direction of the right small exhaust port 86s. For example, when the saddle riding type vehicle 1E is in an upright position, the spray direction of the right small exhaust port 86p is relatively close to horizontal. When the saddle riding type vehicle 1E is in an upright position, the spray direction of the right small exhaust port 86s is relatively close to a downward direction.

[0546] The exhaust device 29E includes left on-off valves 91p, 91s and right on-off valves 91p, 91s. The left on-off valve 91p is provided inside the left branch pipe 87p. The left on-off valve 91p opens and closes the left small exhaust port 84p. The left on-off valve 91s is provided inside the left branch pipe 87s. The left on-off valve 91s opens and closes the left small exhaust port 84s. The right on-off valve 93p is provided inside the right branch pipe 89p. The right on-off valve 93p opens and closes the right small exhaust port 86p. The right on-off valve 93s is provided inside the right branch pipe 89s. The right on-off valve 93s opens and closes the right small exhaust port 86s.

[0547] The saddle riding type vehicle 1E is equipped with an ECU 75E (not shown). The ECU 75E controls the left on-off valve 91p, the left on-off valve 91s, the right on-off valve 93p, the right on-off valve 93s, and the on-off valve 95p based on the detection results of the IMU 81. For example, the left on-off valve 91p and the left on-off valve 91s are controlled together. Alternatively, the left on-off valve 91p and the left on-off valve 91s may be controlled individually. For example, the right on-off valve 93p and the right on-off valve 93s are controlled together. Alternatively, the right on-off valve 93p and the right on-off valve 93s may be controlled individually.

[0548] For example, when the saddle riding type vehicle 1E leans to the left, both of the right small exhaust ports 86p and 86s inject exhaust gas. By injecting exhaust gas from both of the right small exhaust ports 86p and 86s, the direction in which the exhaust gas is injected covers a wider range.

[0549] Alternatively, when the saddle riding type vehicle 1E leans to the left, only some of the left small exhaust ports 86p, 86s may inject exhaust gas.

[0550] 53 and 54. When the inclination angle V1 is a small inclination angle V1a, the jetting direction of the right small exhaust port 86p is closest to the horizontal direction S. When the inclination angle V1 is an inclination angle V1b that is larger than the small inclination angle V1a, the jetting direction of the right small exhaust port 86s is closest to the horizontal direction S2.

[0551] Therefore, the ECU 75E switches the exhaust port that injects exhaust gas between the right small exhaust port 86p and the right small exhaust port 86s depending on the inclination angle V1. For example, when the inclination angle V1 is a small inclination angle V1a, only the right small exhaust port 86p injects exhaust gas. When the inclination angle V1 is a large inclination angle V1b, only the right small exhaust port 86s injects exhaust gas. As a result, the injection direction of the exhaust gas is adjusted to the horizontal direction S2 regardless of the inclination angle V1.

[0552] The effects of this modification will be described below. The right exhaust port 85C is provided with a plurality of right small exhaust ports 86p, 86s. Therefore, it is easy to widen the direction in which exhaust gas is ejected from the right exhaust port 85C.

[0553] The left exhaust port 83C is provided with a plurality of left small exhaust ports 84p, 84s, which makes it easy to expand the direction in which exhaust gas is ejected from the left exhaust port 83C.

[0554] Furthermore, it is easy to switch the exhaust port from which exhaust gas is injected between the multiple right small exhaust ports 86p, 86s, and it is easy to switch the exhaust port from which exhaust gas is injected between the multiple left small exhaust ports 84p, 84s.

[0555] For example, the ECU 75E switches the exhaust gas injection direction between the injection direction of the right small exhaust port 86p and the injection direction of the right small exhaust port 86s in accordance with the inclination angle V1. Therefore, the exhaust gas injection direction is appropriately adjusted. As a result, for example, the first force component F1 increases appropriately regardless of the inclination angle V1.

[0556] (4) In the first embodiment and the like, an electrically operated valve is exemplified as the on-off valve 58. However, the configuration of the on-off valve 58 is not limited to this.

[0557] 55 is a vertical cross-sectional view of an exhaust device 29F according to a modified embodiment, as seen from the side of the vehicle. The same components as those in the first embodiment are given the same reference numerals, and only different components will be described in detail.

[0558] The exhaust device 29F includes an on-off valve 58a. The on-off valve 58a opens and closes the exhaust port 71. The on-off valve 58a is, for example, a spring-loaded valve that opens and closes in response to the pressure of the exhaust gas. The on-off valve 58a switches from a closed state to an open state in response to the magnitude of the pressure of the exhaust gas inside the exhaust device 29F. The pressure of the exhaust gas inside the exhaust device 29F is also called the "back pressure of the engine 31" or the "back pressure of the exhaust gas."

[0559] When the pressure of the exhaust gas in the exhaust device 29F is less than a predetermined value K1, the on-off valve 58a is configured to close the exhaust port 71. When the on-off valve 58a closes the exhaust port 71, the on-off valve 58a prohibits the exhaust port 71 from injecting the exhaust gas. Therefore, when the on-off valve 58 closes the exhaust port 71, the exhaust gas is injected from the exhaust port 73.

[0560] When the pressure of the exhaust gas in the exhaust device 29F is equal to or greater than a predetermined value K1, the on-off valve 58 is configured to open the exhaust port 71. When the on-off valve 58 opens the exhaust port 71, the on-off valve 58 allows the exhaust port 71 to inject the exhaust gas.

[0561] The on-off valve 58a is provided in the first branch pipe 56, for example.

[0562] The on-off valve 58a is an example of the main valve of the present invention.

[0563] The effects of this modification will now be described. When the exhaust gas pressure in the exhaust device 29F is less than the predetermined value K1, the on-off valve 58a is configured to close the exhaust port 71. Therefore, when the exhaust gas pressure in the exhaust device 29F is less than the predetermined value K1, the exhaust port 71 does not inject exhaust gas. Therefore, when the exhaust gas pressure in the exhaust device 29F is less than the predetermined value K1, it is easy to increase the amount of exhaust gas injected from the exhaust port 73. Therefore, when the exhaust gas pressure in the exhaust device 29F is less than the predetermined value K1, it is possible to provide a saddle-type vehicle 1 with good cornering performance.

[0564] The on-off valve 58a opens and closes the exhaust port 71 in accordance with the pressure of the exhaust gas in the exhaust device 29F. Therefore, it is not necessary to control the on-off valve 58a by the ECU 75. Therefore, the configuration of the control system is simple.

[0565] (5) The movement mechanism 96 of the fourth embodiment changes the jetting direction Rc of the exhaust port 73. However, this is not limited to this. For example, the movement mechanism 96 may change the jetting direction Ra of the left exhaust ports 83A and 83B. The movement mechanism 96 may change the jetting direction Rb of the right exhaust ports 85A and 85B.

[0566] 56 and 57 show a straddle-type vehicle 1G according to a modified embodiment. The same components as those in embodiments 1-4 are given the same reference numerals, and only different components will be described in detail.

[0567] The saddle riding type vehicle 1G is equipped with an exhaust device 29A. The exhaust device 29A is as described in the second embodiment. For example, the exhaust device 29A is equipped with an exhaust port 71 and an exhaust port 73A. The exhaust port 73A is equipped with a left exhaust port 83A and a right exhaust port 85A. The left exhaust port 83A injects exhaust gas in an injection direction Ra. The right exhaust port 85A injects exhaust gas in an injection direction Rb.

[0568] The straddle-type vehicle 1G includes a movement mechanism 96. The movement mechanism 96 is as described in the fourth embodiment. For example, the movement mechanism 96 changes the jetting direction Ra. The movement mechanism 96 changes the jetting direction Rb.

[0569] For example, the movement mechanism 96 rotates the exhaust device 29A. The movement mechanism 96 rotates the exhaust device 29A around an axis J. The axis J is disposed at a position eccentric to the left exhaust port 83A. The axis J is disposed at a position eccentric to the right exhaust port 85A.

[0570] Although not shown in the drawings, the saddle riding type vehicle 1G includes an ECU 75C. The ECU 75C is as described in the fourth embodiment. For example, the ECU 75C controls the movement mechanism 96 based on the detection result of the IMU 81.

[0571] The effects of this modification will be described. The saddle riding type vehicle 1G includes an exhaust device 29A, a movement mechanism 96, an IMU 81, and an ECU 75C. The movement mechanism 96 changes the injection directions Ra and Rb. The ECU 75C controls the movement mechanism 96 based on the detection results of the IMU 81. Therefore, it is easy to change the injection direction Rb in accordance with the inclination angle V1. It is also easy to change the injection direction Ra in accordance with the inclination angle V2. Therefore, it is easy to adjust the injection directions Ra and Rb to appropriate directions. Therefore, when the saddle riding type vehicle 1G turns around a curved road Cr, it is easy for the first force to cancel out at least a portion of the centrifugal force E.

[0572] The movement mechanism 96 rotates the exhaust device 29A. This makes it easy to change the injection directions Ra and Rb. Therefore, when the saddle riding type vehicle 1G turns around a curved road Cr, it becomes easy for the first force to offset at least a part of the centrifugal force E.

[0573] (6) In the first to fifth embodiments, the IMU 81 is exemplified as the tilt angle detector. However, the tilt angle detector is not limited to the IMU 81. For example, the tilt angle detector may be a gyro sensor.

[0574] (7) In Examples 1-5, the predetermined value L1 is exemplified as the first threshold value. However, the first threshold value is not limited to the predetermined value L1. For example, the first threshold value may be a variable. The first threshold value may be a variable that depends on the speed of the saddle riding type vehicle 1.

[0575] Similarly, for example, the second threshold value may be a variable, such as a variable that depends on the speed of the saddle riding type vehicle 1.

[0576] (8) In Examples 1-5, the vertical direction W is defined by gravity. However, the definition of the vertical direction W is not limited to this. For example, the vertical direction W may be defined by the road surface G. The vertical direction W may be a direction perpendicular to the road surface G.

[0577] (9) In the fifth embodiment, the ECU 75D controls the on-off valve 103 based on the detection result of the IMU 81. The ECU 75D switches the exhaust device 29D to the upward injection state based on the detection result of the IMU 81. However, the criterion for controlling the on-off valve 103 is not limited to the detection result of the IMU 81. The criterion for determining whether to switch the exhaust device 29D to the upward injection state is not limited to the pitch angle V3.

[0578] For example, the ECU 75D may control the on-off valve 103 based on the detection results of at least one of the accelerator opening sensor 61, stroke sensor 64, throttle valve opening sensor 65, speed sensor 66, acceleration sensor 68, crankshaft position sensor 69, pressure sensor 70, and IMU 81.

[0579] For example, the ECU 75D may switch the exhaust device 29D to an upward injection state based on the detection results of at least one of the accelerator opening sensor 61, stroke sensor 64, throttle valve opening sensor 65, speed sensor 66, acceleration sensor 68, crankshaft position sensor 69, pressure sensor 70, and IMU 81.

[0580] (10) In the fifth embodiment, the third branch pipe 97 is disposed so as to extend rearward and upward in a side view of the vehicle. However, this is not limited to this. The direction in which the third branch pipe 97 extends may be changed as appropriate depending on the position and orientation of the exhaust port 99. As an example, the third branch pipe 97 may be disposed so as to extend horizontally. Alternatively, the third branch pipe 97 may be disposed so as to extend vertically.

[0581] (11) In each embodiment, the number of front wheels 24 is one. However, this is not limited to this. The number of front wheels 24 may be two or more. In each embodiment, the number of rear wheels 49 is one. However, this is not limited to this. The number of rear wheels 49 may be two or more.

[0582] (12) Each of the first to fifth embodiments and the modified embodiments described above in (1) to (11) may be further modified as appropriate by replacing or combining each configuration with the configuration of another modified embodiment. [Explanation of symbols]

[0583] 1, 1A, 1B, 1C, 1D, 1E, 1G ... Saddle-type vehicles 3... Body frame 24... Front wheel 29, 29A, 29B, 29C, 29D, 29E, 29F, 29G ... Exhaust system 31... Engine 39... fuel tank 41 ... seats 47 … Rear axle 49 ... rear wheel 51 ... Rear wheel brake device 53...Brake pedal 55 … Merging pipe 56 ... First branch pipe 57 ... Second branch pipe 58...Shut-off valve (main valve, first valve) 58a ... On-off valve (main valve) 59 … Information entrance 60 ... Branch 61 ... Accelerator opening sensor 63…Fuel supply device 64 ... Fork sensor 65 ... Throttle valve opening sensor 66 ... Speed ​​sensor 67 ... Gear position sensor 68...Accelerometer 69 ... Crankshaft position sensor 70... Pressure sensor 71... Exhaust port (main exhaust port) 73, 73A, 73B, 73C ... Exhaust port (first exhaust port) 75, 75A, 75C, 75D, 75E ... ECU (control unit, first valve control unit, main valve control unit, movement mechanism control unit) 77...CPU 79 … Storage section 81 ... IMU (inclination angle sensor) 83A, 83B, 83C ... Left exhaust port 85A, 85B, 85C ... Right exhaust port 84p, 84s ... Left small exhaust port 86p, 86s ... Right small exhaust port 87A, 87B ... Left branch pipe 89A, 89B ... Right branch pipe 90 … Aisle change area 91, 91p, 91s ... Left opening / closing valve (first valve) 93, 93p, 93s ... Right opening / closing valve (first valve) 95...Shut-off valve (main valve) 96 … Movement mechanism 97 ... Third branch pipe 99... Exhaust port (second exhaust port) 101 ... On-off valve (first valve) 103 ... On-off valve E... centrifugal force H: Jet from first exhaust port Hb: Jet from the second exhaust port Hc: Main exhaust port jet F … Reaction force of the jet from the first exhaust port (first force) Fb: Reaction force of the jet from the second exhaust port (second force) Fc: Reaction force of the jet from the main exhaust port F1 … 1st component force F2 … 2nd component force F3 … 3rd component force L1: Predetermined value (first threshold) L2: Predetermined value (second threshold) M1 ... first moment Rc: Injection direction of the first exhaust port Ra: Injection direction of right exhaust port Rb: Injection direction of left exhaust port V1: Leftward tilt angle of the saddle-type vehicle V2: Inclination angle of the saddle-type vehicle to the right X: Front-to-rear direction of saddle-type vehicle Y: Width direction of saddle type vehicle Z: Up and down direction of the saddle type vehicle

Claims

1. A saddle-type vehicle, Equipped with an exhaust device that discharges exhaust gases, the exhaust device includes a first exhaust port that injects the exhaust gas to apply a first force to the saddle-ride type vehicle, When the saddle-ride type vehicle turns a curved road, the first force offsets at least a part of the centrifugal force acting on the saddle-ride type vehicle.

2. The saddle-type vehicle according to claim 1, The first force is a reaction force of the jet of exhaust gas injected from the first exhaust port. Saddle-type vehicle.

3. The saddle-type vehicle according to claim 1, When the saddle-ride type vehicle turns a curved road, the first exhaust port injects the exhaust gas in the same direction as the centrifugal force acting on the saddle-ride type vehicle. Saddle-type vehicle.

4. The saddle-type vehicle according to claim 1, When the saddle-ride type vehicle turns a curved road, the first force includes a first component having a direction opposite to a direction of the centrifugal force acting on the saddle-ride type vehicle. Saddle-type vehicle.

5. The saddle-type vehicle according to claim 1, The direction in which the exhaust gas is ejected from the first exhaust port changes depending on the lean angle of the saddle-ride type vehicle to the right and left. Saddle-type vehicle.

6. The saddle-type vehicle according to claim 1, the first exhaust port is disposed so that the exhaust gas is ejected downward when the saddle-ride type vehicle is in an upright position, When the saddle-type vehicle leans to the right, the first exhaust port ejects exhaust gas, When the saddle-type vehicle leans to the left, the first exhaust port ejects exhaust gas. Saddle-type vehicle.

7. The saddle-type vehicle according to claim 1, The first exhaust port is A right exhaust port that is installed so as to inject exhaust gas to the right; A left exhaust port that is installed so as to inject exhaust gas to the left; Equipped with the exhaust device includes a passage changing unit that changes a passage of exhaust gas within the exhaust device to switch between a rightward injection state in which the exhaust gas is injected from the right exhaust port and a leftward injection state in which the exhaust gas is injected from the left exhaust port, The saddle-ride type vehicle is a tilt angle detection unit that detects the tilt angles of the saddle riding type vehicle to the right and left; a control unit that controls the path changing unit based on a detection result of the inclination angle detection unit; Equipped with Saddle-type vehicle.

8. The saddle-type vehicle according to claim 7, the right exhaust port is disposed so that the exhaust gas is ejected to the right and downward when the saddle-ride type vehicle is in an upright position, The left exhaust port is disposed so that the exhaust gas is ejected downward and to the left when the saddle-ride type vehicle is in an upright position. Saddle-type vehicle.

9. The saddle-type vehicle according to claim 7, the right exhaust port is disposed so that the exhaust gas is ejected to the right and horizontally when the saddle-ride type vehicle is in an upright position, When the saddle-ride type vehicle is in an upright position, the left exhaust port is disposed so that the exhaust gas is ejected horizontally to the left from the left exhaust port. Saddle-type vehicle.

10. The saddle-type vehicle according to claim 1, The exhaust device is a main exhaust port for discharging the exhaust gas; Equipped with The first exhaust port is smaller than the main exhaust port. Saddle-type vehicle.

11. The saddle-type vehicle according to claim 1, The first exhaust port has a diameter smaller than the diameter of the main exhaust port. Saddle-type vehicle.

12. The saddle-type vehicle according to claim 10, The exhaust device is A main valve is provided to open and close the main exhaust port. Saddle-type vehicle.

13. The saddle-type vehicle according to claim 12, The main valve is configured to close the main exhaust port when the pressure of the exhaust gas in the exhaust system is below a predetermined value. Saddle-type vehicle.

14. The saddle-type vehicle according to claim 12, a tilt angle detection unit that detects the tilt angles of the saddle riding type vehicle to the right and left; a main valve control unit that controls the main valve based on a detection result of the tilt angle detection unit; Equipped with Saddle-type vehicle.

15. The saddle-type vehicle according to claim 1, The front wheel and The rear wheel and Equipped with The exhaust device is a second exhaust port that injects the exhaust gas to apply a second force to the front wheel; The second force acts in a direction that suppresses lifting of the front wheels from the road surface. Saddle-type vehicle.

Images