Saddle-riding type vehicle

Abstract

To provide a saddle-riding type vehicle which can appropriately reduce the air resistance of the saddle-riding type vehicle, and which can improve the cooling efficiency of a heat exchanger.SOLUTION: A saddle-riding type vehicle 1 includes a power unit 7, a heat exchanger 21, a cowl 31, an opening and closing member 51, a temperature detector 81, and a control unit 90. The heat exchanger 21 is placed at the forward side relative to the power unit 7. The cowl 31 overlaps with the heat exchanger 21 in a side view of the saddle-riding type vehicle 1. The cowl 31 includes an inlet port 32 and an outlet port 33. The inlet port 32 is positioned at the forward side relative to the heat exchanger 21. The outlet port 33 is positioned at the rearward side relative to the heat exchanger 21. The opening and closing member 51 can open and close the outlet port 33. The temperature detector 81 detects the temperature of a fluid flowing through inside the heat exchanger 21. The control unit 90 controls the opening and closing member 51 based on the detection result by the temperature detector 81.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a saddle-type vehicle provided with a cowl.

Background Art

[0002] Patent Document 1 discloses a saddle-type vehicle. The saddle-type vehicle includes a cowl and a radiator. The radiator is disposed within the cowl. The cowl has an inlet and a window portion. The inlet introduces air into the cowl. The window portion is an opening for discharging the air within the cowl to the outside of the cowl. The window portion is disposed rearward of the inlet. The window portion is disposed forward of the radiator.

[0003] The saddle-type vehicle further includes a rotating plate. The rotating plate opens and closes the window portion. The rotating plate is disposed forward of the radiator. When the rotating plate opens the window portion, air enters the cowl through the inlet and flows out of the cowl through the window portion. Therefore, the air resistance received by the saddle-type vehicle is reduced. When the rotating plate closes the window portion, air enters the cowl through the inlet and passes through the radiator. Therefore, the radiator suitably cools the cooling water.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In Patent Document 1, the window portion is disposed behind the inlet and in front of the radiator. Therefore, when the window portion is open, only a part of the air that has entered the cowl through the inlet is discharged through the window portion, and the remaining air that has entered the cowl through the inlet passes through the radiator. Thus, it is difficult to sufficiently reduce the amount of air passing through the radiator when the window portion is open. Therefore, it is difficult to appropriately reduce the air resistance of the saddle-type vehicle when the window portion is open.

[0006] The closer the radiator is to the inlet, the more the cooling efficiency of the radiator is improved. However, in Patent Document 1, the window portion is disposed behind the inlet and in front of the radiator. For this reason, it is difficult to dispose the radiator close to the inlet. Therefore, it is difficult to further improve the cooling efficiency of the radiator.

[0007] The present invention has been made in view of such circumstances, and an object thereof is to provide a saddle-type vehicle capable of appropriately reducing the air resistance of the saddle-type vehicle and improving the cooling efficiency of the heat exchanger.

Means for Solving the Problems

[0008] In order to achieve such an object, the present invention has the following configuration. The saddle-type vehicle according to the present invention includes a power unit, a heat exchanger disposed in front of the power unit, a cowl that overlaps the heat exchanger in a side view of the saddle-type vehicle, the cowl having an inlet disposed in front of the heat exchanger and an outlet disposed behind the heat exchanger, an opening / closing member capable of opening and closing the outlet, a temperature detector that detects the temperature of the liquid flowing in the heat exchanger, a control unit that controls the opening / closing member based on the detection result of the temperature detector, and is a saddle-type vehicle.

[0009] [Function and Effect] The straddle-type vehicle includes a power unit, a heat exchanger, a cowl, an opening / closing member, a temperature detector, and a control unit. The heat exchanger is disposed forward of the power unit. The cowl overlaps the heat exchanger in a side view of the straddle-type vehicle. The cowl has an inlet and an outlet. The inlet is disposed forward of the heat exchanger. The outlet is disposed rearward of the heat exchanger. The opening / closing member can open and close the outlet. The temperature detector detects the temperature of the liquid flowing through the heat exchanger. The control unit controls the opening / closing member based on the detection result of the temperature detector. Therefore, it is easy for the control unit to appropriately control the opening / closing member.

[0010] The opening / closing member adjusts the amount of air passing through the heat exchanger.

[0011] For example, when the opening / closing member opens the outlet, the outlet discharges the air in the cowl. Therefore, when the opening / closing member opens the outlet, air easily enters the cowl through the inlet. When the opening / closing member opens the outlet, air easily flows in the cowl. When the opening / closing member opens the outlet, air easily passes through the heat exchanger. Therefore, when the opening / closing member opens the outlet, the amount of air passing through the heat exchanger is large. Therefore, when the opening / closing member opens the outlet, the heat exchanger appropriately cools the liquid.

[0012] For example, when the opening / closing member closes the outlet, the outlet does not discharge the air in the cowl. Therefore, when the opening / closing member closes the outlet, air hardly enters the cowl through the inlet. When the opening / closing member closes the outlet, air hardly flows in the cowl. When the opening / closing member closes the outlet, air hardly passes through the heat exchanger. Therefore, when the opening / closing member closes the outlet, it is easy to sufficiently reduce the amount of air passing through the heat exchanger. Therefore, when the opening / closing member closes the outlet, it is easy to appropriately reduce the air resistance of the straddle-type vehicle.

[0013] As described above, the outlet is disposed rearward of the heat exchanger. Therefore, it is easy to dispose the heat exchanger near the inlet. Therefore, it is easy to improve the cooling efficiency of the heat exchanger.

[0014] In summary, the saddle-type vehicle can appropriately reduce the air resistance of the saddle-type vehicle. Further, the saddle-type vehicle can improve the cooling efficiency of the heat exchanger.

[0015] In the above-described saddle-type vehicle, the opening / closing member is preferably disposed rearward of the heat exchanger.

[0016] [Function and Effect] For this reason, it is easier to dispose the heat exchanger near the inlet. Therefore, it is easier to improve the cooling efficiency of the heat exchanger.

[0017] In the above-described saddle-type vehicle, the cowl includes a left cover disposed on the left side of the heat exchanger and extending in the longitudinal direction of the saddle-type vehicle, and a right cover disposed on the right side of the heat exchanger and extending in the longitudinal direction of the saddle-type vehicle. The inlet is disposed to the right of the left cover and to the left of the right cover. The outlet includes a first left outlet penetrating the left cover and a first right outlet penetrating the right cover. The opening / closing member preferably includes a first left opening / closing member for opening and closing the first left outlet and a first right opening / closing member for opening and closing the first right outlet.

[0018] [Function and Effect] The inlet is disposed to the right of the left cover and to the left of the right cover. For this reason, it is easy to provide the inlet in the cowl. The outlet has a first left outlet and a first right outlet. The first left outlet penetrates the left cover. The first right outlet penetrates the right cover. For this reason, it is easy to provide the outlet in the cowl. The opening / closing member includes a first left opening / closing member and a first right opening / closing member. The first left opening / closing member opens and closes the first left outlet. The first right opening / closing member opens and closes the first right outlet. For this reason, it is easy for the opening / closing member to open and close the outlet.

[0019] In the above-described saddle-type vehicle, The left cover has a first left recess that is recessed to the right, the first left discharge port is disposed in the first left recess, the right cover has a first right recess that is recessed to the left, and it is preferable that the first right discharge port is disposed in the first right recess.

[0020] [Operation and Effect] The left cover has a first left recess that is recessed to the right. The first left discharge port is disposed in the first left recess. Therefore, the first left discharge port is disposed at an appropriate position. The right cover has a first right recess that is recessed to the left. The first right discharge port is disposed in the first right recess. Therefore, the first right discharge port is disposed at an appropriate position.

[0021] In the above-described saddle-riding type vehicle, The first left discharge port is disposed at the front of the first left recess and extends in the width direction of the saddle-riding type vehicle. The first left recess includes a first left guide wall that extends rearward and leftward from the right end of the first left discharge port. The first right discharge port is disposed at the front of the first right recess and extends in the width direction of the saddle-riding type vehicle. The first right recess preferably includes a first right guide wall that extends rearward and rightward from the left end of the first right discharge port.

[0022] [Operation and Effect] The first left discharge port is disposed at the front of the first left recess. The first left discharge port extends in the width direction of the saddle-riding type vehicle. Therefore, when the first left opening / closing member opens the first left discharge port, the first left discharge port efficiently discharges the air inside the cowl to the outside of the cowl. The first left recess includes a first left guide wall. The first left guide wall extends rearward and leftward from the right end of the first left discharge port. Therefore, the first left guide wall guides the air rearward and leftward from the first left discharge port. The first right discharge port is disposed at the front of the first right recess. The first right discharge port extends in the width direction of the saddle-riding type vehicle. Therefore, when the first right opening / closing member opens the first right discharge port, the first right discharge port efficiently discharges the air inside the cowl to the outside of the cowl. The first right recess includes a first right guide wall. The first right guide wall extends rearward and rightward from the left end of the first right discharge port. Therefore, the first right guide wall guides the air rearward and rightward from the first right discharge port.

[0023] In the above-described saddle-riding type vehicle, Preferably, the right end of the first left discharge port is located to the right of the left end of the heat exchanger, and the left end of the first right discharge port is located to the left of the right end of the heat exchanger.

[0024] [Function and Effect] The right end of the first left discharge port is located to the right of the left end of the heat exchanger. Therefore, when the first left opening / closing member opens the first left discharge port, the first left discharge port efficiently discharges the air that has passed through the heat exchanger to the outside of the cowl. The left end of the first right discharge port is located to the left of the right end of the heat exchanger. Therefore, when the first right opening / closing member opens the first right discharge port, the first right discharge port efficiently discharges the air that has passed through the heat exchanger to the outside of the cowl.

[0025] In the above-described straddle-type vehicle, The cowl preferably includes a lower cover disposed below the heat exchanger, and the lower cover preferably connects the right cover and the left cover.

[0026] [Function and Effect] The lower cover prevents the air inside the cowl from being discharged below the cowl. Therefore, the amount of air discharged from inside the cowl to the outside of the cowl through locations other than the discharge ports is small. Thus, the opening / closing member effectively adjusts the amount of air passing through the heat exchanger. For example, when the opening / closing member opens the discharge port, the amount of air passing through the heat exchanger effectively increases. For example, when the opening / closing member closes the discharge port, the amount of air passing through the heat exchanger effectively decreases.

[0027] In the above-described straddle-type vehicle, The opening / closing member is preferably disposed in front of the power unit.

[0028] [Function and Effect] The opening / closing member does not interfere with the power unit.

[0029] In the above-described straddle-type vehicle, The cowl preferably overlaps the power unit in a side view of the straddle-type vehicle.

[0030] [Function and Effect] As described above, the power unit is disposed behind the heat exchanger. The power unit prevents the air inside the cowl from being discharged to the rear of the cowl. For this reason, the amount of air discharged from inside the cowl to outside the cowl through locations other than the discharge port is even less. Therefore, the opening / closing member can more effectively adjust the amount of air passing through the heat exchanger.

[0031] In the above-described straddle-type vehicle, Preferably, the cowl extends from a position higher than the heat exchanger to a position lower than the power unit.

[0032] [Function and Effect] For this reason, the cowl is large. Therefore, when the opening / closing member opens the discharge port, the amount of air passing through the heat exchanger is large.

[0033] In the above-described straddle-type vehicle, Preferably, the heat exchanger includes at least one of a radiator and an oil cooler.

[0034] [Function and Effect] When the heat exchanger includes a radiator, the opening / closing member adjusts the amount of air passing through the radiator. When the heat exchanger includes an oil cooler, the opening / closing member adjusts the amount of air passing through the oil cooler.

[0035] In the above-described straddle-type vehicle, Preferably, a catalytic device overlapping the cowl in a side view of the straddle-type vehicle is provided.

[0036] [Function and Effect] The catalytic device overlaps the cowl in a side view of the straddle-type vehicle. For this reason, it is easy for the opening / closing member to adjust the air flow around the catalytic device. For example, the air flow around the catalytic device when the opening / closing member opens the discharge port is larger than the air flow around the catalytic device when the opening / closing member closes the discharge port.

[0037] In the above-described straddle-type vehicle, When the temperature of the liquid rises from a value lower than the first threshold value to a value higher than the first threshold value, the control unit switches the opening / closing member from the closed state to the open state. When the temperature of the liquid drops from a value higher than the second threshold value to a value lower than the second threshold value, the control unit switches the opening / closing member from the open state to the closed state. It is preferable that the second threshold value is lower than the first threshold value.

[0038] [Operation and Effect] When the temperature of the liquid rises from a value lower than the first threshold value to a value higher than the first threshold value, the opening / closing member switches from the closed state to the open state. Here, when the opening / closing member is in the open state, the opening / closing member opens the discharge port. When the opening / closing member is in the closed state, the opening / closing member closes the discharge port. Therefore, the heat exchanger appropriately cools the liquid. When the temperature of the liquid drops from a value higher than the second threshold value to a value lower than the second threshold value, the opening / closing member switches from the open state to the closed state. Therefore, the air resistance of the straddle-type vehicle appropriately decreases. As described above, the control unit appropriately controls the opening / closing member.

[0039] In the above-mentioned straddle-type vehicle, It is provided with at least one of an outside air temperature detector for detecting the outside air temperature, a throttle opening detector for detecting the opening degree of the throttle, and a vehicle speed detector for detecting the speed of the straddle-type vehicle. The control unit preferably adjusts the opening degree of the opening / closing member according to at least one of the detection result of the outside air temperature by the outside air temperature detector, the detection result of the throttle opening degree by the throttle opening detector, and the detection result of the speed of the straddle-type vehicle by the vehicle speed detector.

[0040] [Operation and Effect] The control unit adjusts the opening degree of the opening / closing member. Here, the opening degree of the opening / closing member is one of the factors of the amount of air passing through the heat exchanger. Therefore, when the opening / closing member opens the discharge port, the control unit adjusts the amount of air passing through the heat exchanger.

[0041] According to at least one of the detection results of the outside air temperature, the detection result of the throttle opening degree, and the detection result of the speed of the straddle-type vehicle, the control unit adjusts the opening degree of the opening / closing member. Here, the detection result of the outside air temperature is one factor of the temperature of the air passing through the heat exchanger. The detection result of the throttle opening degree is one of the factors of the temperature of the liquid in the heat exchanger. The speed of the straddle-type vehicle is one of the factors of the amount of air passing through the heat exchanger. Therefore, the control unit appropriately adjusts the amount of air passing through the heat exchanger.

[0042] The straddle-type vehicle includes at least one of an outside air temperature detector, a throttle opening degree detector, and a vehicle speed detector. Therefore, it is easy for the control unit to adjust the opening degree of the opening / closing member according to at least one of the detection result of the outside air temperature, the detection result of the throttle opening degree, and the detection result of the speed of the straddle-type vehicle.

[0043] In the above-mentioned straddle-type vehicle, It is preferable to provide a plurality of the heat exchangers, provide the discharge ports for each of the plurality of heat exchangers, and provide the opening / closing members for each of the plurality of discharge ports.

[0044] [Function and Effect] The discharge ports are provided for each of the plurality of heat exchangers. The opening / closing members are provided for each of the discharge ports. Therefore, it is easy to individually adjust the amount of air passing through each heat exchanger.

[0045] In the above-mentioned straddle-type vehicle, When the opening / closing member opens the discharge port, it is preferable that the control unit increases the opening degree of the opening / closing member as the outside air temperature is higher.

[0046] In other words, in the above-mentioned straddle-type vehicle, When the opening / closing member opens the discharge port, it is preferable that the control unit decreases the opening degree of the opening / closing member as the outside air temperature is lower.

[0047] [Function and Effect] When the opening / closing member opens the discharge port, the higher the outside air temperature, the greater the opening degree of the opening / closing member that the control unit increases. When the opening / closing member opens the discharge port, the lower the outside air temperature, the smaller the opening degree of the opening / closing member that the control unit decreases. For example, when the outside air temperature is relatively high, the temperature of the air passing through the heat exchanger is high, and the amount of air passing through the heat exchanger is large. Therefore, when the outside air temperature is relatively high, the heat exchanger appropriately cools the liquid. For example, when the outside air temperature is relatively low, the temperature of the air passing through the heat exchanger is low, and the amount of air passing through the heat exchanger is small. Therefore, when the outside air temperature is relatively low, the heat exchanger appropriately cools the liquid. Thus, regardless of the outside air temperature, the heat exchanger appropriately cools the liquid. As described above, the control unit appropriately adjusts the opening degree of the opening / closing member.

[0048] In the above-described straddle-type vehicle, When the opening / closing member opens the discharge port, it is preferable that the greater the throttle opening degree, the greater the opening degree of the opening / closing member that the control unit increases.

[0049] In other words, in the above-described straddle-type vehicle, When the opening / closing member opens the discharge port, it is preferable that the smaller the throttle opening degree, the smaller the opening degree of the opening / closing member that the control unit decreases.

[0050] [Function and Effect] When the opening / closing member opens the discharge port, the greater the throttle opening degree, the greater the opening degree of the opening / closing member that the control unit increases. When the opening / closing member opens the discharge port, the smaller the throttle opening degree, the smaller the opening degree of the opening / closing member that the control unit decreases. For example, when the throttle opening degree is relatively large, the temperature of the liquid in the heat exchanger is high, and the amount of air passing through the heat exchanger is large. Therefore, when the throttle opening degree is relatively large, the heat exchanger appropriately cools the liquid. For example, when the throttle opening degree is relatively small, the temperature of the liquid in the heat exchanger is low, and the amount of air passing through the heat exchanger is small. Therefore, when the throttle is relatively small, the heat exchanger appropriately cools the liquid. Thus, regardless of the throttle opening degree, the heat exchanger appropriately cools the liquid. As described above, the control unit appropriately adjusts the opening degree of the opening / closing member.

[0051] Alternatively, in the above-described straddle-type vehicle, When the opening / closing member opens the discharge port, it is preferable that the control unit decreases the opening degree of the opening / closing member as the throttle opening degree is larger.

[0052] [Operation and Effect] When the opening / closing member opens the discharge port, the control unit decreases the opening degree of the opening / closing member as the throttle opening degree is larger. For example, when the throttle opening degree is relatively large, the temperature of the liquid in the heat exchanger is high, and the amount of air passing through the heat exchanger is small. Therefore, when the throttle opening degree is relatively large, the reduction of the air resistance of the straddle-type vehicle is prioritized over the cooling of the liquid by the heat exchanger. In other words, when the throttle opening degree is relatively large, the acceleration of the straddle-type vehicle is prioritized over the cooling of the liquid by the heat exchanger. As described above, the control unit appropriately adjusts the opening degree of the opening / closing member.

[0053] In the above-described straddle-type vehicle, When the opening / closing member opens the discharge port, it is preferable that the control unit decreases the opening degree of the opening / closing member as the speed of the straddle-type vehicle is higher.

[0054] In other words, in the above-described straddle-type vehicle, When the opening / closing member opens the discharge port, it is preferable that the control unit increases the opening degree of the opening / closing member as the speed of the straddle-type vehicle is lower.

[0055] [Function and Effect] When the opening / closing member opens the discharge port, the higher the speed of the straddle-type vehicle, the smaller the control unit makes the opening degree of the opening / closing member. When the opening / closing member opens the discharge port, the lower the speed of the straddle-type vehicle, the larger the control unit makes the opening degree of the opening / closing member. For example, when the speed of the straddle-type vehicle is relatively high, the amount of air passing through the heat exchanger does not become excessively large. Therefore, when the speed of the straddle-type vehicle is relatively high, the heat exchanger appropriately cools the liquid. For example, when the speed of the straddle-type vehicle is relatively low, the amount of air passing through the heat exchanger does not become excessively small. Therefore, when the speed of the straddle-type vehicle is relatively low, the heat exchanger appropriately cools the liquid. Thus, regardless of the speed of the straddle-type vehicle, the heat exchanger appropriately cools the liquid. As described above, the control unit appropriately adjusts the opening degree of the opening / closing member.

Effect of the Invention

[0056] According to the straddle-type vehicle of the present invention, the air resistance of the straddle-type vehicle can be appropriately reduced, and the cooling efficiency of the heat exchanger can be improved.

Brief Description of the Drawings

[0057]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0058] Hereinafter, the straddle-type vehicle according to the present invention will be described with reference to the drawings.

[0059] 1. Schematic Configuration of Straddle-Type Vehicle 1 FIG. 1 is a left side view of a straddle-type vehicle 1 according to an embodiment. The schematic configuration of the straddle-type vehicle 1 will be described.

[0060] FIG. 1 shows the longitudinal direction X, the width direction Y, and the vertical direction Z of the straddle-type vehicle 1. The longitudinal direction X, the width direction Y, and the vertical direction Z are defined with reference to a driver (also referred to as a rider) who has boarded the straddle-type vehicle 1. The longitudinal direction X, the width direction Y, and the vertical direction Z are orthogonal to each other. The longitudinal direction X and the width direction Y are horizontal. The vertical direction Z is vertical.

[0061] "Front", "rear", "above", "below", "right", and "left" respectively mean "front", "rear", "above", "below", "right", and "left" for the driver who has boarded the straddle-type vehicle 1. Unless otherwise specified in this specification, "front" and "rear" include not only directions parallel to the longitudinal direction X but also directions close to the longitudinal direction X. A direction close to the longitudinal direction X is, for example, a direction with an angle of 45 degrees or less with respect to the longitudinal 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, "above" and "below" include not only directions parallel to the vertical direction Z but also directions close to the vertical direction Z. In each figure, for reference, FRONT, REAR, UP, DOWN, RIGHT, and LEFT are appropriately shown.

[0062] In this specification, "in a side view of the straddle-type vehicle 1" is appropriately referred to as "in a side view of the vehicle". "In a plan view of the straddle-type vehicle 1" is appropriately referred to as "in a plan view of the vehicle". "In a front view of the straddle-type vehicle 1" is appropriately referred to as "in a front view of the vehicle".

[0063] The straddle-type vehicle 1 includes a vehicle body frame 2, a fuel tank 5, and a seat 6. The vehicle body frame 2 includes a head pipe 3 and a main frame 4. The head pipe 3 is disposed at the front portion of the straddle-type vehicle 1. The main frame 4 extends rearward and downward from the head pipe 3. The fuel tank 5 and the seat 6 are supported by the vehicle body frame 2. The fuel tank 5 is disposed above the main frame 4. The seat 6 is disposed behind the fuel tank 5.

[0064] The straddle-type vehicle 1 includes a power unit 7. The power unit 7 is supported by the vehicle body frame 2. The power unit 7 is disposed below the main frame 4. The power unit 7 is disposed below the fuel tank 5. The power unit 7 generates a driving force for causing the straddle-type vehicle 1 to travel. The power unit 7 is, for example, an engine. The engine is a water-cooled engine that uses cooling water. The cooling water cools the engine.

[0065] The straddle-type vehicle 1 includes a catalytic device 8. The catalytic device 8 purifies the exhaust gas of the power unit 7. The catalytic device 8 is, for example, disposed below the power unit 7. The catalytic device 8 is, for example, provided in an exhaust pipe connected to the power unit 7. The exhaust gas of the power unit 7 passes through the catalytic device 8.

[0066] The straddle-type vehicle 1 includes a steering device 11 and a front wheel 12. The steering device 11 is supported by the vehicle body frame 2. The steering device 11 is supported by the head pipe 3. The steering device 11 is swingable with respect to the vehicle body frame 2. The steering device 11 extends downward. The front wheel 12 is rotatably supported at the lower end portion of the steering device 11.

[0067] The straddle-type vehicle 1 includes a swing arm 13 and a rear wheel 14. The swing arm 13 is swingably supported at the rear portion of the main frame 4. The swing arm 13 extends rearward from the main frame 4. The rear wheel 14 is rotatably supported at the rear end portion of the swing arm 13.

[0068] The straddle-type vehicle 1 is provided with a transmission mechanism 15. The transmission mechanism 15 is, for example, a chain. The transmission mechanism 15 transmits the driving force from the power unit 7 to the rear wheels 14. The driving force rotates the rear wheels 14 to propel the straddle-type vehicle 1.

[0069] The straddle-type vehicle 1 is provided with a heat exchanger 21. The heat exchanger 21 is supported by, for example, the vehicle body frame 2. The heat exchanger 21 is disposed below the head pipe 3. The heat exchanger 21 is disposed in front of the power unit 7. The heat exchanger 21 is disposed in front of the catalytic device 8. The heat exchanger 21 is disposed behind the front wheels 12. A liquid flows through the heat exchanger 21. The heat exchanger 21 cools the liquid.

[0070] The number of the heat exchangers 21 is, for example, one. The heat exchanger 21 includes, for example, a radiator. The liquid is, for example, cooling water. The cooling water circulates between the heat exchanger 21 and the power unit 7. The heat exchanger 21 and the power unit 7 are connected via a pipe (not shown) for the cooling water.

[0071] The straddle-type vehicle 1 is provided with a cowl 31. The cowl 31 covers the front portion of the straddle-type vehicle 1. The cowl 31 extends rearward from a position in front of the head pipe 3. The cowl 31 is also called a front cowl or a front cover.

[0072] In a side view of the vehicle, the cowl 31 overlaps with the power unit 7. For example, in a side view of the vehicle, the cowl 31 overlaps with a part of the power unit 7. The cowl 31 extends from a position higher than the heat exchanger 21 to a position lower than the power unit 7.

[0073] In a side view of the vehicle, the cowl 31 overlaps with the catalytic device 8. For example, in a side view of the vehicle, the cowl 31 overlaps with a part of the catalytic device 8. The cowl 31 extends from a position higher than the heat exchanger 21 to a position lower than the catalytic device 8.

[0074] The cowl 31 overlaps with the heat exchanger 21 in a side view of the vehicle. The cowl 31 overlaps with the entire heat exchanger 21 in a side view of the vehicle.

[0075] The cowl 31 has an inlet 32. The inlet 32 is arranged at the front part of the cowl 31. The inlet 32 is arranged in front of the heat exchanger 21. The heat exchanger 21 is arranged behind the inlet 32. The inlet 32 introduces air into the cowl 31. The air enters the cowl 31 from outside the cowl 31 through the inlet 32.

[0076] The cowl 31 has an outlet 33. The outlet 33 is arranged behind the inlet 32. The outlet 33 is arranged behind the heat exchanger 21. The outlet 33 discharges the air in the cowl 31. The air exits the cowl 31 from inside the cowl 31 through the outlet 33.

[0077] The straddle-type vehicle 1 includes an opening / closing member 51. The opening / closing member 51 can open and close the outlet 33. The opening / closing member 51 switches between an open state and a closed state. When the opening / closing member 51 is in the open state, the opening / closing member 51 opens the outlet 33. When the opening / closing member 51 is in the closed state, the opening / closing member 51 closes the outlet 33.

[0078] The opening / closing member 51 is provided at the outlet 33. The opening / closing member 51 is movable relative to the cowl 31. The opening / closing member 51 is rotatable relative to the cowl 31, for example. When the opening / closing member 51 moves relative to the cowl 31, the opening / closing member 51 switches between the open state and the closed state. When the opening / closing member 51 moves relative to the cowl 31, the opening / closing member 51 opens and closes the outlet 33.

[0079] The opening / closing member 51 is arranged behind the heat exchanger 21. The entire opening / closing member 51 is arranged behind the entire heat exchanger 21. The opening / closing member 51 does not have a portion located in front of the heat exchanger 21. Therefore, the opening / closing member 51 does not overlap with the heat exchanger 21 in a side view of the vehicle.

[0080] The opening / closing member 51 is disposed forward of the power unit 7. All of the opening / closing member 51 is disposed forward of all of the power unit 7. For this reason, the opening / closing member 51 does not overlap the power unit 7 in a side view of the vehicle.

[0081] The opening / closing member 51 is disposed forward of the catalyst device 8. All of the opening / closing member 51 is disposed forward of all of the catalyst device 8. For this reason, the opening / closing member 51 does not overlap the catalyst device 8 in a side view of the vehicle.

[0082] FIG. 2 is a front view of the saddle-riding type vehicle 1. The cowl 31 includes a left cover 41L and a right cover 41R. The left cover 41L is disposed to the left of the front wheel 12. The left cover 41L is disposed to the left of the heat exchanger 21. The left cover 41L extends in the vertical direction Z in a front view of the vehicle. The right cover 41R is disposed to the right of the left cover 41L. The right cover 41R is disposed to the right of the front wheel 12. The right cover 41R is disposed to the right of the heat exchanger 21. The right cover 41R extends in the vertical direction Z in a front view of the vehicle.

[0083] The inlet 32 is disposed between the left cover 41L and the right cover 41R. The inlet 32 is disposed to the right of the left cover 41L. The inlet 32 is disposed to the left of the right cover 41R.

[0084] The cowl 31 includes a front cover 48 and a lower cover 49. The front cover 48 is disposed in front of the head pipe 3. The front cover 48 is disposed above the front wheel 12. The front cover 48 is disposed above the heat exchanger 21. The front cover 48 is disposed above the left cover 41L and the right cover 41R. The front cover 48 is connected to the upper end of the left cover 41L. The front cover 48 is connected to the upper end of the right cover 41R. The front cover 48 connects the left cover 41L and the right cover 41R. The front cover 48 extends from the upper end of the left cover 41L to the upper end of the right cover 41R. The lower cover 49 is disposed below the front cover 48. The lower cover 49 is disposed below the heat exchanger 21. The lower cover 49 is connected to the lower end of the left cover 41L. The lower cover 49 is connected to the lower end of the right cover 41R. The lower cover 49 connects the left cover 41L and the right cover 41R. The lower cover 49 extends from the lower end of the left cover 41L to the lower end of the right cover 41R.

[0085] The inlet 32 is disposed between the front cover 48 and the lower cover 49. The inlet 32 is disposed below the front cover 48. The inlet 32 is disposed above the lower cover 49.

[0086] Referring to FIG. 1, the left cover 41L overlaps the heat exchanger 21 in a side view of the vehicle. The left cover 41L overlaps the power unit 7 in a side view of the vehicle. Although not shown, the right cover 41R overlaps the heat exchanger 21 in a side view of the vehicle. The right cover 41R overlaps the power unit 7 in a side view of the vehicle.

[0087] The lower cover 49 is disposed below the power unit 7. The lower cover 49 overlaps the catalytic device 8 in a side view of the vehicle.

[0088] Figures 3 and 4 are cross-sectional views taken along line III-III in Figure 1. In Figure 3, the opening / closing member 51 is in the open state. In Figure 4, the opening / closing member 51 is in the closed state. The left cover 41L extends in the front-rear direction X. The right cover 41R extends in the front-rear direction X. The inlet 32 is disposed between the front edge of the left cover 41L and the front edge of the right cover 41R. The inlet 32 is disposed to the right of the front edge of the left cover 41L and to the left of the front edge of the right cover 41R.

[0089] More specifically, the inlet 32 is defined by the front edge of the left cover 41L, the front edge of the right cover 41R, the lower edge of the front cover 48, and the front edge of the lower cover 49.

[0090] The left cover 41L extends from a position in front of the heat exchanger 21 to a position behind the heat exchanger 21. The right cover 41R extends from a position in front of the heat exchanger 21 to a position behind the heat exchanger 21. The heat exchanger 21 is disposed between the left cover 41L and the right cover 41R. The heat exchanger 21 extends in the width direction Y.

[0091] The left cover 41L extends to a position to the left of the power unit 7. The right cover 41R extends to a position to the right of the power unit 7. The power unit 7 is disposed between the left cover 41L and the right cover 41R.

[0092] The left cover 41L extends to a position to the left of the catalyst device 8. The right cover 41R extends to a position to the right of the catalyst device 8. The catalyst device 8 is disposed between the left cover 41L and the right cover 41R.

[0093] The outlet 33 is disposed behind the inlet 32. The outlet 33 is disposed behind the heat exchanger 21. The outlet 33 is disposed in front of the power unit 7. The outlet 33 is disposed in front of the catalyst device 8.

[0094] The discharge port 33 includes a first left discharge port 34L. The first left discharge port 34L is provided in the left cover 41L. The first left discharge port 34L penetrates the left cover 41L. The first left discharge port 34L is disposed behind the heat exchanger 21. All of the first left discharge port 34L is disposed behind all of the heat exchanger 21. The first left discharge port 34L has no portion located in front of the heat exchanger 21. For this reason, the first left discharge port 34L does not overlap the heat exchanger 21 in a side view of the vehicle.

[0095] The left cover 41L has a first left recess 42L. The first left recess 42L is recessed rightward. The first left recess 42L is disposed behind the heat exchanger 21.

[0096] The first left discharge port 34L is disposed in the first left recess 42L. The first left discharge port 34L is disposed at the front portion of the first left recess 42L. The first left discharge port 34L extends in the width direction Y. The first left discharge port 34L has a right end 34La.

[0097] The first left recess 42L includes a first left guide wall 43L. The first left guide wall 43L extends rearward and leftward from the right end 34La of the first left discharge port 34L. The first left guide wall 43L guides air rearward and leftward from the first left discharge port 34L.

[0098] The position of the first left discharge port 34L and the position of the heat exchanger 21 overlap in the width direction Y. Specifically, the heat exchanger 21 has a left end 21a and a right end 21b. The right end 34La of the first left discharge port 34L is located rightward of the left end 21a of the heat exchanger 21. The right end 34La of the first left discharge port 34L is located leftward of the right end 21b of the heat exchanger 21.

[0099] The discharge port 33 includes a first right discharge port 34R. The first right discharge port 34R is provided in the right cover 41R. The first right discharge port 34R penetrates the right cover 41R. The first right discharge port 34R is disposed behind the heat exchanger 21. All of the first right discharge port 34R is disposed behind all of the heat exchanger 21. The first right discharge port 34R does not have a portion located in front of the heat exchanger 21. For this reason, the first right discharge port 34R does not overlap the heat exchanger 21 in a side view of the vehicle.

[0100] The right cover 41R has a first right recess 42R. The first right recess 42R is recessed to the left. The first right recess 42R is disposed behind the heat exchanger 21.

[0101] The first right discharge port 34R is disposed in the first right recess 42R. The first right discharge port 34R is disposed at the front portion of the first right recess 42R. The first right discharge port 34R extends in the width direction Y. The first right discharge port 34R has a left end 34Ra.

[0102] The first right recess 42R includes a first right guide wall 43R. The first right guide wall 43R extends rearward and rightward from the left end 34Ra of the first right discharge port 34R. The first right guide wall 43R guides air rearward and rightward from the first right discharge port 34R.

[0103] The position of the first right discharge port 34R and the position of the heat exchanger 21 overlap in the width direction Y. Specifically, the left end 34Ra of the first right discharge port 34R is located to the left of the right end 21b of the heat exchanger 21. The left end 34Ra of the first right discharge port 34R is located to the right of the left end 21a of the heat exchanger 21.

[0104] The opening and closing member 51 includes a first left opening and closing member 52L. The first left opening and closing member 52L can open and close the first left discharge port 34L. The first left opening and closing member 52L is provided at the first left discharge port 34L. The first left opening and closing member 52L is supported by the left cover 41L. The first left opening and closing member 52L is movable with respect to the left cover 41L.

[0105] The first left opening / closing member 52L is disposed behind the heat exchanger 21. The entirety of the first left opening / closing member 52L is disposed behind the entirety of the heat exchanger 21. The first left opening / closing member 52L does not have a portion located in front of the heat exchanger 21. Therefore, the first left opening / closing member 52L does not overlap with the heat exchanger 21 in a side view of the vehicle.

[0106] The first left opening / closing member 52L is disposed in front of the power unit 7. Therefore, the first left opening / closing member 52L does not interfere with the power unit 7.

[0107] For example, the first left opening / closing member 52L includes two plates 53La and 53Lb. The plates 53La and 53Lb each have a plate shape. The plate 53La and the plate 53Lb are arranged in the width direction Y. The plates 53La and 53Lb are each rotatable with respect to the left cover 41L.

[0108] The opening / closing member 51 includes a first right opening / closing member 52R. The first right opening / closing member 52R can open and close the first right discharge port 34R. The first right opening / closing member 52R is provided at the first right discharge port 34R. The first right opening / closing member 52R is supported by the right cover 41R. The first right opening / closing member 52R is movable with respect to the right cover 41R.

[0109] The first right opening / closing member 52R is disposed behind the heat exchanger 21. The entirety of the first right opening / closing member 52R is disposed behind the entirety of the heat exchanger 21. The first right opening / closing member 52R does not have a portion located in front of the heat exchanger 21. Therefore, the first right opening / closing member 52R does not overlap with the heat exchanger 21 in a side view of the vehicle.

[0110] The first right opening / closing member 52R is disposed in front of the power unit 7. Therefore, the first right opening / closing member 52R does not interfere with the power unit 7.

[0111] For example, the first right opening / closing member 52R includes two plates 53Ra and 53Rb. The plates 53Ra and 53Rb each have a plate shape. The plate 53Ra and the plate 53Rb are arranged in the width direction Y. The plates 53Ra and 53Rb are rotatable with respect to the right cover 41R.

[0112] Refer to FIG. 3. The air flow when the opening / closing member 51 is in the open state will be described. When the opening / closing member 51 is in the open state, for example, an air flow A1 and an air flow A2 are generated. The air flow A1 passes through the heat exchanger 21. The air flow A2 does not pass through the heat exchanger 21. FIG. 3 schematically shows the air flows A1 and A2 by dashed lines.

[0113] The air flow A1 will be described. The air flow A1 enters the cowl 31 from the area in front of the inlet 32 through the inlet 32. The air flow A1 flows rearward within the cowl 31. The air flow A1 is guided by the cowl 31 to the heat exchanger 21. The air flow A1 passes through the heat exchanger 21. The air flow A1 takes heat from the heat exchanger 21. The air flow A1 cools the liquid of the heat exchanger 21. Due to the air flow A1 passing through the heat exchanger 21, the saddle-type vehicle 1 receives air resistance. Then, the air flow A1 exits the cowl 31 from the outlet 33. Specifically, after the air flow A1 passes through the heat exchanger 21, the air flow A1 exits the cowl 31 through the first left outlet 34L and the first right outlet 34R. After the air flow A1 is discharged from the first left outlet 34L, the air flow A1 is guided by the first left guide wall 43L. The air flow A1 flows rearward and leftward along the first left guide wall 43L. The air flow A1 leaves the saddle-type vehicle 1 to the left. After the air flow A1 is discharged from the first right outlet 34R, the air flow A1 is guided by the first right guide wall 43R. The air flow A1 flows rearward and rightward along the first right guide wall 43R. The air flow A1 leaves the saddle-type vehicle 1 to the right.

[0114] The airflow A2 will be described. The airflow A2 flows rearward outside the cowl 31. The airflow A2 flows rearward through the area to the left of the left cover 41L. The airflow A2 flows rearward along the left cover 41L. The airflow A2 flows rearward through the area to the right of the right cover 41R. The airflow A2 flows rearward along the right cover 41R.

[0115] After the airflow A1 is discharged from the discharge port 33 to the outside of the cowl 31, the airflow A1 collides with the airflow A2. The airflow A2 is disturbed by the airflow A1. The airflow A2 is disturbed in the area near the discharge port 33. Due to the disturbance of the airflow A2, the air resistance of the saddle-type vehicle 1 further increases.

[0116] Refer to FIG. 4. The air flow when the opening / closing member 51 is in the closed state will be described. When the opening / closing member 51 is in the closed state, for example, the airflow A1 does not substantially occur. When the opening / closing member 51 is in the closed state, the airflow A2 occurs.

[0117] When the opening / closing member 51 is in the closed state, air does not flow from inside the cowl 31 to the outside of the cowl 31 through the discharge port 33. The air inside the cowl 31 loses its way. The air stays inside the cowl 31. The pressure of the air inside the cowl 31 may increase. For this reason, it is difficult for air to enter the cowl 31 through the inlet 32 from the area in front of the inlet 32. That is, the airflow A1 hardly occurs. The air flows from the area in front of the inlet 32 to the area to the left of the left cover 41L or the area to the right of the right cover 41R. That is, the airflow A2 occurs.

[0118] When the opening / closing member 51 is in the closed state, the amount of air passing through the heat exchanger 21 decreases. The amount of air passing through the heat exchanger 21 is extremely small. For this reason, the air resistance of the saddle-type vehicle 1 caused by the air passing through the heat exchanger 21 decreases. The air resistance of the saddle-type vehicle 1 is small.

[0119] As described above, when the opening / closing member 51 is in the closed state, air does not flow from inside the cowl 31 to the outside of the cowl 31 through the discharge port 33. Therefore, the air flow A2 is less likely to be disturbed. The air flow A2 flows smoothly in the area near the discharge port 33. Thus, the air resistance of the straddle-type vehicle 1 is further reduced.

[0120] FIG. 5 and FIG. 6 are perspective views of the heat exchanger 21, the discharge port 33, and the opening / closing member 51. Specifically, the discharge port 33 in FIGS. 5 and 6 is the first left discharge port 34L. The opening / closing member 51 in FIGS. 5 and 6 is the first left opening / closing member 52L. FIG. 5 shows the first left opening / closing member 52L in the closed state, and FIG. 6 shows the first left opening / closing member 52L in the open state.

[0121] The heat exchanger 21 has a plurality of pipe lines 23 through which cooling water flows. Each pipe line 23 extends, for example, in the width direction Y. The heat exchanger 21 has a plurality of air flow paths 24 formed therein. The plurality of air flow paths 24 are arranged between the plurality of pipe lines 23. The above-described air flow A1 passes through the flow path 24. When the air flow A1 passes through the flow path 24, the air flow A1 contacts the pipe line 23.

[0122] The first left recess 42L further includes a first left upper wall 44L and a first left lower wall 45L. The first left upper wall 44L extends rearward from the upper end of the first left discharge port 34L. The first left lower wall 45L extends rearward from the lower end of the first left discharge port 34L.

[0123] The straddle-type vehicle 1 includes a drive unit 61. The drive unit 61 opens and closes the opening / closing member 51.

[0124] The drive unit 61 includes a first left drive unit 62L. The first left drive unit 62L opens and closes the first left opening / closing member 52L. Although not shown, the drive unit 61 includes a first right drive unit. The first right drive unit opens and closes the first right opening / closing member 52R.

[0125] The configuration of the first left drive unit 62L is illustrated. The first left drive unit 62L includes a motor 63 and a transmission mechanism 64. The motor 63 outputs rotational power. The transmission mechanism 64 transmits the rotational power from the motor 63 to the first left opening / closing member 52L. The rotational power rotates the first left opening / closing member 52L to open and close the first left discharge port 34L.

[0126] The motor 63 is fixed to the left cover 41L. The motor 63 is disposed, for example, to the right of the first left guide wall 43L. The motor 63 is classified as, for example, a stepping motor. The stepping motor preferably adjusts the opening degree of the first left opening / closing member 52L. For example, the stepping motor can stop the first left opening / closing member 52L at a specified angle.

[0127] The transmission mechanism 64 includes a first shaft 65, a first pulley 66, a second pulley 67, a belt 68, a second shaft 69, a third pulley 70, a fourth pulley 71, a belt 72, and a third shaft 73. The first shaft 65 is connected to the motor 63. The first pulley 66 is fixed to the first shaft 65. The belt 68 is wound around the first pulley 66 and the second pulley 67. The second shaft 69 is fixed to the second pulley 67. The third pulley 70 is fixed to the second shaft 69. The belt 72 is wound around the third pulley 70 and the fourth pulley 71. The third shaft 73 is fixed to the fourth pulley 71.

[0128] The diameter of the third pulley 70 is the same as the diameter of the fourth pulley 71. Therefore, the rotation angle of the third pulley 70 is the same as the rotation angle of the fourth pulley 71.

[0129] The second shaft 69 and the third shaft 73 each extend, for example, in the vertical direction Z. The second shaft 69 and the third shaft 73 are arranged in the width direction Y. The second shaft 69 and the third shaft 73 are each supported by the left cover 41L. For example, the second shaft 69 and the third shaft 73 are each supported by the first left upper surface wall 44L and the first left lower surface wall 45L. The second shaft 69 and the third shaft 73 are each rotatable with respect to the left cover 41L.

[0130] Plate 53La is fixed to the second shaft 69. Plate 53La is supported by the second shaft 69. Plate 53Lb is fixed to the third shaft 73. Plate 53Lb is supported by the third shaft 73.

[0131] An operation example of the first left drive unit 62L will be described. When the motor 63 outputs rotational power, the first shaft 65 and the first pulley 66 rotate integrally. The belt 68 transmits the rotational power from the first pulley 66 to the second pulley 67. The second pulley 67, the second shaft 69, the third pulley 70, and the plate 53La rotate integrally. The belt 72 transmits the rotational power from the third pulley 70 to the fourth pulley 71. The fourth pulley 71, the third shaft 73, and the plate 53Lb rotate integrally. The rotation angle of the plate 53La is the same as the rotation angle of the plate 53Lb.

[0132] FIG. 7 is a control block diagram of the straddle-type vehicle 1. The straddle-type vehicle 1 includes a temperature detector 81. The temperature detector 81 detects the temperature of the liquid flowing in the heat exchanger 21. The temperature detector 81 detects, for example, the temperature of the cooling water of the radiator.

[0133] The straddle-type vehicle 1 includes an outside air temperature detector 82. The outside air temperature detector 82 detects the temperature of the outside air of the straddle-type vehicle 1.

[0134] The straddle-type vehicle 1 includes a throttle opening detector 83. The throttle opening detector 83 detects the opening of the throttle.

[0135] The straddle-type vehicle 1 includes a vehicle speed detector 84. The vehicle speed detector 84 detects the speed of the straddle-type vehicle 1.

[0136] The straddle-type vehicle 1 includes a catalyst temperature detector 86. The catalyst temperature detector 86 detects the temperature of the catalyst device 8. Here, the temperature of the catalyst device 8 may be the temperature of the catalyst device 8 itself. Alternatively, the temperature of the catalyst device 8 may be the temperature of the exhaust gas in the catalyst device 8.

[0137] The straddle-type vehicle 1 is provided with a control unit 90. The control unit 90 is connected to the drive unit 61. The control unit 90 controls the opening / closing member 51. The control unit 90 controls the opening / closing member 51 via the drive unit 61. The control unit 90 causes the opening / closing member 51 to open and close the discharge port 33.

[0138] The control unit 90 is connected to a temperature detector 81, an outside air temperature detector 82, a throttle opening detector 83, a vehicle speed detector 84, and a catalyst temperature detector 86. The control unit 90 acquires the detection results of the temperature detector 81, the outside air temperature detector 82, the throttle opening detector 83, the vehicle speed detector 84, and the catalyst temperature detector 86. The control unit 90 controls the opening / closing member 51 based on these detection results. Thereby, according to the situation of the straddle-type vehicle 1, the balance between the cooling of the heat exchanger 21 and the air resistance of the straddle-type vehicle 1 is adjusted.

[0139] For example, the control unit 90 controls the opening / closing member 51 based on the detection result of the temperature detector 81. The control unit 90 switches the opening / closing member 51 between the open state and the closed state based on the detection result of the temperature detector 81.

[0140] For example, the control unit 90 adjusts the opening degree of the opening / closing member 51 according to at least any one of the detection result of the outside air temperature by the outside air temperature detector 82, the detection result of the throttle opening by the throttle opening detector 83, and the detection result of the speed of the straddle-type vehicle by the vehicle speed detector 84.

[0141] For example, the control unit 90 adjusts the opening degree of the opening / closing member 51 according to the detection result of the catalyst temperature detector 86.

[0142] The control unit 90 includes, for example, a ROM (Read Only Memory), a processor, and a RAM (Random Access Memory). The ROM stores various programs. The programs stored in the ROM include, for example, an opening / closing control program for the opening / closing member 51. The processor performs arithmetic processing. The processor executes the programs stored in the ROM. Thereby, the processor realizes various functions. The processor is, for example, a CPU (Central Processing Unit). The RAM temporarily stores various information. The RAM is used as a working area for the processor.

[0143] The control unit 90 includes an arithmetic unit 91. The arithmetic unit 91 may include the above-described processor. The arithmetic unit 91 reads the programs stored in the ROM. The arithmetic unit 91 executes the programs.

[0144] The control unit 90 includes a storage unit 92. The storage unit 92 may include a part of the above-described ROM and RAM. The storage unit 92 may include components other than the above-described ROM and RAM. The storage unit 92 may be at least one of a semiconductor memory and a hard disk.

[0145] The storage unit 92 stores a first threshold value and a second threshold value. The second threshold value is lower than the first threshold value. The arithmetic unit 91 refers to the first threshold value and the second threshold value stored in the storage unit 92.

[0146] The control unit 90 may be an Electric Control Unit (ECU) provided in the saddle-riding type vehicle 1.

[0147] 2. Operations of the saddle-riding type vehicle 1 The control by the control unit 90 and the operations of the saddle-riding type vehicle 1 are exemplified. Specifically, Control Examples 1-6 are described.

[0148] <Control Example 1> The control unit 90 controls the opening and closing of the opening / closing member 51 based on the detection result of the temperature detector 81.

[0149] For example, when the temperature of the liquid in the heat exchanger 21 rises from a value lower than the first threshold value to a value higher than the first threshold value, the control unit 90 switches the opening / closing member 51 from the closed state to the open state. Specifically, when the temperature of the liquid in the heat exchanger 21 rises from a value lower than the first threshold value to a value higher than the first threshold value, the control unit 90 switches the first left opening / closing member 52L and the first right opening / closing member 52R from the closed state to the open state. The first threshold value is, for example, 90°C.

[0150] When the temperature of the liquid in the heat exchanger 21 rises from a value lower than the first threshold value to a value higher than the first threshold value, the opening / closing member 51 switches from the closed state to the open state. When the opening / closing member 51 switches from the closed state to the open state, the amount of air passing through the heat exchanger 21 increases. Therefore, it becomes easier for the heat exchanger 21 to cool the liquid. Thus, the temperature of the liquid in the heat exchanger 21 does not become excessively high.

[0151] For example, when the temperature of the liquid in the heat exchanger 21 drops from a value higher than the second threshold value to a value lower than the second threshold value, the control unit 90 switches the opening / closing member 51 from the open state to the closed state. Specifically, when the temperature of the liquid in the heat exchanger 21 drops from a value higher than the second threshold value to a value lower than the second threshold value, the control unit 90 switches the first left opening / closing member 52L and the first right opening / closing member 52R from the open state to the closed state. The second threshold value is set to a temperature lower than the first threshold value. The second threshold value is, for example, 80°C.

[0152] When the temperature of the liquid in the heat exchanger 21 drops from a value higher than the second threshold value to a value lower than the second threshold value, the opening / closing member 51 switches from the open state to the closed state. When the opening / closing member 51 switches from the open state to the closed state, the amount of air passing through the heat exchanger 21 significantly decreases. Therefore, it becomes difficult for the heat exchanger 21 to cool the liquid. Thus, the temperature of the liquid in the heat exchanger 21 does not become excessively low. Furthermore, the air resistance of the straddle-type vehicle 1 due to the air passing through the heat exchanger 21 significantly decreases.

[0153] <Control Example 2> When the opening / closing member 51 opens the discharge port 33, the control unit 90 adjusts the opening degree of the opening / closing member 51 based on the detection result of the outside air temperature detector 82.

[0154] For example, when the opening / closing member 51 opens the discharge port 33, the higher the outside air temperature, the greater the opening degree of the opening / closing member 51 that the control unit 90 sets. Specifically, the higher the outside air temperature, the greater the opening degrees of the first left opening / closing member 52L and the first right opening / closing member 52R that the control unit 90 sets.

[0155] As the outside air temperature rises, it becomes more difficult to cool the liquid for the heat exchanger 21. As the outside air temperature rises, the opening degree of the opening / closing member 51 increases. As the opening degree of the opening / closing member 51 increases, the amount of air passing through the heat exchanger 21 increases. For this reason, even when the outside air temperature is high, the heat exchanger 21 cools the liquid appropriately. For example, even when the outside air temperature is high, the liquid of the heat exchanger 21 does not become excessively high.

[0156] For example, when the opening / closing member 51 opens the discharge port 33, the lower the outside air temperature, the smaller the opening degree of the opening / closing member 51 that the control unit 90 sets. Specifically, the lower the outside air temperature, the smaller the opening degrees of the first left opening / closing member 52L and the first right opening / closing member 52R that the control unit 90 sets.

[0157] As the outside air temperature drops, it becomes easier to cool the liquid for the heat exchanger 21. As the outside air temperature drops, the opening degree of the opening / closing member 51 decreases. As the opening degree of the opening / closing member 51 decreases, the amount of air passing through the heat exchanger 21 decreases. For this reason, even when the outside air temperature is low, the heat exchanger 21 cools the liquid appropriately. For example, even when the outside air temperature is low, the liquid of the heat exchanger 21 does not become excessively low. Further, when the outside air temperature is low, the air resistance of the straddle-type vehicle 1 due to the air passing through the heat exchanger 21 decreases.

[0158] <Control Example 3> When the opening / closing member 51 opens the discharge port 33, the control unit 90 adjusts the opening degree of the opening / closing member 51 based on the detection result of the throttle opening detector 83.

[0159] For example, when the opening / closing member 51 opens the discharge port 33, the greater the throttle opening degree, the greater the opening degree of the opening / closing member 51 that the control unit 90 makes. Specifically, the greater the throttle opening degree, the greater the opening degrees of the first left opening / closing member 52L and the first right opening / closing member 52R that the control unit 90 makes.

[0160] As the throttle opening degree increases, the temperature of the liquid in the heat exchanger 21 tends to increase. As the throttle opening degree increases, the opening degree of the opening / closing member 51 increases. That is, as the throttle opening degree increases, the amount of air passing through the heat exchanger 21 increases. For this reason, even when the throttle opening degree is large, the heat exchanger 21 appropriately cools the liquid. For example, even when the throttle opening degree is large, the liquid in the heat exchanger 21 does not become excessively high.

[0161] For example, when the opening / closing member 51 opens the discharge port 33, the smaller the throttle opening degree, the smaller the opening degree of the opening / closing member 51 that the control unit 90 makes. Specifically, the smaller the throttle opening degree, the smaller the opening degrees of the first left opening / closing member 52L and the first right opening / closing member 52R that the control unit 90 makes.

[0162] As the throttle opening degree decreases, the temperature of the liquid in the heat exchanger 21 is less likely to increase. As the throttle opening degree decreases, the opening degree of the opening / closing member 51 decreases. That is, as the throttle opening degree decreases, the amount of air passing through the heat exchanger 21 decreases. For this reason, even when the throttle opening degree is small, the heat exchanger 21 appropriately cools the liquid. For example, even when the throttle opening degree is small, the liquid in the heat exchanger 21 does not become excessively low. Further, when the throttle opening degree is small, the air resistance of the straddle-type vehicle 1 due to the air passing through the heat exchanger 21 decreases.

[0163] <Control Example 4> When the opening / closing member 51 opens the discharge port 33, the control unit 90 adjusts the opening degree of the opening / closing member 51 based on the detection result of the throttle opening degree detector 83. However, the adjustment of the opening degree in <Control Example 4> is opposite to the adjustment of the opening degree in <Control Example 3>.

[0164] For example, when the opening / closing member 51 opens the discharge port 33, the greater the throttle opening, the smaller the control unit 90 makes the opening degree of the opening / closing member 51. Specifically, the greater the throttle opening, the smaller the control unit 90 makes the opening degrees of the first left opening / closing member 52L and the first right opening / closing member 52R.

[0165] The greater the throttle opening, the more rapid acceleration of the saddle-riding type vehicle 1 is required. The greater the throttle opening, the smaller the opening degree of the opening / closing member 51. That is, the greater the throttle opening, the smaller the amount of air passing through the heat exchanger 21. The greater the throttle opening, the smaller the air resistance of the saddle-riding type vehicle 1 caused by the air passing through the heat exchanger 21. Therefore, the greater the throttle opening, the better the acceleration performance of the saddle-riding type vehicle 1.

[0166] <Control Example 5> When the opening / closing member 51 opens the discharge port 33, the control unit 90 adjusts the opening degree of the opening / closing member 51 based on the detection result of the vehicle speed detector 84.

[0167] For example, when the opening / closing member 51 opens the discharge port 33, the higher the speed of the saddle-riding type vehicle 1, the smaller the control unit 90 makes the opening degree of the opening / closing member 51. Specifically, the higher the speed of the saddle-riding type vehicle 1, the smaller the control unit 90 makes the opening degrees of the first left opening / closing member 52L and the first right opening / closing member 52R.

[0168] As the speed of the saddle-riding type vehicle 1 increases, the opening degree of the opening / closing member 51 decreases. For this reason, even when the speed of the saddle-riding type vehicle 1 is high, the amount of air passing through the heat exchanger 21 is appropriately adjusted. For example, even when the speed of the saddle-riding type vehicle 1 is high, the amount of air passing through the heat exchanger 21 does not become excessively large. For this reason, even when the speed of the saddle-riding type vehicle 1 is high, the heat exchanger 21 appropriately cools the liquid. Further, even when the speed of the saddle-riding type vehicle 1 is high, the air resistance of the saddle-riding type vehicle 1 caused by the air passing through the heat exchanger 21 does not become excessively large.

[0169] For example, when the opening / closing member 51 opens the discharge port 33, the control unit 90 increases the opening degree of the opening / closing member 51 as the speed of the straddle-type vehicle 1 is lower. Specifically, the control unit 90 increases the opening degrees of the first left opening / closing member 52L and the first right opening / closing member 52R as the speed of the straddle-type vehicle 1 is lower.

[0170] As the speed of the straddle-type vehicle 1 decreases, the opening degree of the opening / closing member 51 increases. Therefore, even when the speed of the straddle-type vehicle 1 is low, the amount of air passing through the heat exchanger 21 is appropriately adjusted. For example, even when the speed of the straddle-type vehicle 1 is low, the amount of air passing through the heat exchanger 21 is not excessively small. Therefore, even when the speed of the straddle-type vehicle 1 is low, the heat exchanger 21 appropriately cools the liquid.

[0171] <Control Example 6> When the opening / closing member 51 opens the discharge port 33, the control unit 90 adjusts the opening / closing member 51 based on the detection result of the catalyst temperature detector 86.

[0172] For example, when the opening / closing member 51 opens the discharge port 33, the control unit 90 increases the opening degree of the opening / closing member 51 as the temperature of the catalyst device 8 is higher. Specifically, the control unit 90 increases the opening degrees of the first left opening / closing member 52L and the first right opening / closing member 52R as the temperature of the catalyst device 8 is higher.

[0173] As the temperature of the catalyst device 8 increases, the opening degree of the opening / closing member 51 increases. Therefore, as the temperature of the catalyst device 8 increases, the air flow around the catalyst device 8 increases. Therefore, the temperature of the catalyst device 8 does not become excessively high. Thus, the catalyst device 8 suitably exhibits the function of purifying the exhaust gas.

[0174] For example, when the opening / closing member 51 opens the discharge port 33, the control unit 90 decreases the opening degree of the opening / closing member 51 as the temperature of the catalyst device 8 is lower. Specifically, the control unit 90 decreases the opening degrees of the first left opening / closing member 52L and the first right opening / closing member 52R as the temperature of the catalyst device 8 is lower.

[0175] As the temperature of the catalyst device 8 decreases, the opening degree of the opening / closing member 51 decreases. Therefore, as the temperature of the catalyst device 8 decreases, the air flow around the catalyst device 8 decreases. For this reason, the temperature of the catalyst device 8 does not become excessively low. Thus, the catalyst device 8 suitably exhibits the function of purifying the exhaust gas.

[0176] 3. Effects of the Embodiment The straddle-type vehicle 1 includes a power unit 7, a heat exchanger 21, a cowl 31, an opening / closing member 51, a temperature detector 81, and a control unit 90. The heat exchanger 21 is disposed in front of the power unit 7. The cowl 31 overlaps the heat exchanger 21 in a side view of the vehicle. The cowl 31 has an inlet 32 and an outlet 33. The inlet 32 is disposed in front of the heat exchanger 21. The outlet 33 is disposed behind the heat exchanger 21. The opening / closing member 51 can open and close the outlet 33. The temperature detector 81 detects the temperature of the liquid flowing in the heat exchanger 21. The control unit 90 controls the opening / closing member 51 based on the detection result of the temperature detector 81. For this reason, it is easy for the control unit 90 to appropriately control the opening / closing member 51.

[0177] The opening / closing member 51 adjusts the amount of air passing through the heat exchanger 21.

[0178] For example, when the opening / closing member 51 opens the outlet 33, the outlet 33 discharges the air in the cowl 31. Therefore, when the opening / closing member 51 opens the outlet 33, air easily enters the cowl 31 through the inlet 32. When the opening / closing member 51 opens the outlet 33, air easily flows in the cowl 31. When the opening / closing member 51 opens the outlet 33, air easily passes through the heat exchanger 21. Thus, when the opening / closing member 51 opens the outlet 33, the amount of air passing through the heat exchanger 21 is large. Thus, when the opening / closing member 51 opens the outlet 33, the heat exchanger 21 appropriately cools the liquid.

[0179] For example, when the opening and closing member 51 closes the discharge port 33, the discharge port 33 does not discharge the air inside the cowl 31. Therefore, when the opening and closing member 51 closes the discharge port 33, it is difficult for air to enter the cowl 31 through the inlet port 32. When the opening and closing member 51 closes the discharge port 33, air hardly flows inside the cowl 31. When the opening and closing member 51 closes the discharge port 33, it is difficult for air to pass through the heat exchanger 21. Therefore, when the opening and closing member 51 closes the discharge port 33, it is easy to sufficiently reduce the amount of air passing through the heat exchanger 21. Therefore, when the opening and closing member 51 closes the discharge port 33, it is easy to appropriately reduce the air resistance of the saddle-type vehicle 1.

[0180] As described above, the discharge port 33 is disposed behind the heat exchanger 21. For this reason, it is easy to dispose the heat exchanger 21 near the inlet port 32. Therefore, it is easy to improve the cooling efficiency of the heat exchanger 21.

[0181] In summary, the saddle-type vehicle 1 can appropriately reduce the air resistance of the saddle-type vehicle 1. Further, the saddle-type vehicle 1 can improve the cooling efficiency of the heat exchanger 21.

[0182] As described above, the discharge port 33 is disposed behind the heat exchanger 21. In other words, the discharge port 33 is not located at the front portion of the cowl 31. For this reason, the size of the front portion of the cowl 31 is relatively small. For example, the length of the cowl 31 in the width direction Y is relatively small. For example, the length in the width direction Y between the front edge of the left cover 41L and the front edge of the right cover 41R is relatively small. Therefore, the air resistance of the cowl 31 is relatively small. Therefore, the air resistance of the saddle-type vehicle 1 is further reduced.

[0183] As described above, the discharge port 33 is disposed behind the heat exchanger 21. For this reason, it is not necessary to provide an installation space for the discharge port 33 and the opening and closing member 51 in front of the heat exchanger 21. Therefore, it is easy to dispose the heat exchanger 21 near the inlet port 32. Thereby, the cooling efficiency of the heat exchanger 21 is improved.

[0184] The opening / closing member 51 is disposed behind the heat exchanger 21. Therefore, it is even easier to dispose the heat exchanger 21 near the inlet 32. Thus, it is even easier to improve the cooling efficiency of the heat exchanger 21.

[0185] The inlet 32 is disposed to the right of the left cover 41L and to the left of the right cover 41R. Therefore, it is easy to provide the inlet 32 in the cowl 31.

[0186] The outlet 33 has a first left outlet 34L and a first right outlet 34R. The first left outlet 34L penetrates the left cover 41L. The first right outlet 34R penetrates the right cover 41R. Therefore, it is easy to provide the outlet 33 in the cowl 31.

[0187] The opening / closing member 51 includes a first left opening / closing member 52L and a first right opening / closing member 52R. The first left opening / closing member 52L opens and closes the first left outlet 34L. The first right opening / closing member 52R opens and closes the first right outlet 34R. Therefore, it is easy for the opening / closing member 51 to open and close the outlet 33.

[0188] The left cover 41L has a first left recess 42L that is recessed to the right. The first left outlet 34L is disposed in the first left recess 42L. Therefore, the first left outlet 34L is disposed at an appropriate position. The right cover 41R has a first right recess 42R that is recessed to the left. The first right outlet 34R is disposed in the first right recess 42R. Therefore, the first right outlet 34R is disposed at an appropriate position.

[0189] The first left outlet 34L is disposed at the front portion of the first left recess 42L. The first left outlet 34L extends in the width direction Y. Therefore, when the first left opening / closing member 52L opens the first left outlet 34L, the first left outlet 34L efficiently discharges the air inside the cowl 31 to the outside of the cowl 31.

[0190] The first left recess 42L includes a first left guide wall 43L. The first left guide wall 43L extends rearward and leftward from the right end 34La of the first left discharge port 34L. Therefore, the first left guide wall 43L guides air rearward and leftward from the first left discharge port 34L. Thus, after the air is discharged from the first left discharge port 34L, it is difficult for the air to come into contact with the straddle-type vehicle 1 again. Therefore, the rear part of the straddle-type vehicle 1 is difficult to be warmed by the air discharged from the first left discharge port 34L.

[0191] The first right discharge port 34R is disposed at the front part of the first right recess 42R. The first right discharge port 34R extends in the width direction Y. Therefore, when the first right opening / closing member 52R opens the first right discharge port 34R, the first right discharge port 34R efficiently discharges the air inside the cowl 31 to the outside of the cowl 31.

[0192] The first right recess 42R includes a first right guide wall 43R. The first right guide wall 43R extends rearward and rightward from the left end 34Ra of the first right discharge port 34R. Therefore, the first right guide wall 43R guides air rearward and rightward from the first right discharge port 34R. Thus, after the air is discharged from the first right discharge port 34R, it is difficult for the air to come into contact with the straddle-type vehicle 1 again. Therefore, the rear part of the straddle-type vehicle 1 is difficult to be warmed by the air discharged from the first right discharge port 34R.

[0193] The right end 34La of the first left discharge port 34L is located to the right of the left end 21a of the heat exchanger 21. Therefore, when the first left opening / closing member 52L opens the first left discharge port 34L, the first left discharge port 34L efficiently discharges the air that has passed through the heat exchanger 21 to the outside of the cowl 31.

[0194] The left end 34Ra of the first right discharge port 34R is located to the left of the right end 21b of the heat exchanger 21. Therefore, when the first right opening / closing member 52R opens the first right discharge port 34R, the first right discharge port 34R efficiently discharges the air that has passed through the heat exchanger 21 to the outside of the cowl 31.

[0195] The cowl 31 includes a lower cover 49 disposed below the heat exchanger 21. The lower cover 49 connects the right cover 41R and the left cover 41L. The lower cover 49 prevents the air inside the cowl 31 from being discharged below the cowl 31. Therefore, the amount of air discharged from inside the cowl 31 to outside the cowl 31 through locations other than the discharge port 33 is small. Thus, the opening / closing member 51 effectively adjusts the amount of air passing through the heat exchanger 21. For example, when the opening / closing member 51 opens the discharge port 33, the amount of air passing through the heat exchanger 21 effectively increases. For example, when the opening / closing member 51 closes the discharge port 33, the amount of air passing through the heat exchanger 21 effectively decreases.

[0196] The opening / closing member 51 is disposed in front of the power unit 7. The opening / closing member 51 does not interfere with the power unit 7.

[0197] In a side view of the vehicle, the cowl 31 overlaps the power unit 7. As described above, the power unit 7 is disposed behind the heat exchanger 21. The power unit 7 prevents the air inside the cowl 31 from being discharged behind the cowl 31. Therefore, the amount of air discharged from inside the cowl 31 to outside the cowl 31 through locations other than the discharge port 33 is even smaller. Thus, the opening / closing member 51 can more effectively adjust the amount of air passing through the heat exchanger 21.

[0198] The cowl 31 extends from a position higher than the heat exchanger 21 to a position lower than the power unit 7. Therefore, the cowl 31 is large. Thus, when the opening / closing member 51 opens the discharge port 33, the amount of air passing through the heat exchanger 21 is large.

[0199] The heat exchanger 21 includes a radiator. Therefore, the opening / closing member 51 adjusts the amount of air passing through the radiator.

[0200] The straddle-type vehicle 1 is provided with a catalytic device 8. The catalytic device 8 overlaps with the cowl 31 in a side view of the vehicle. Therefore, it is easy for the opening / closing member 51 to adjust the air flow around the catalytic device 8. For example, when the opening / closing member 51 opens the discharge port 33, the air flow around the catalytic device 8 is larger than the air flow around the catalyst when the opening / closing member 51 closes the discharge port 33.

[0201] Control example 1 has the following effects. That is, when the temperature of the liquid rises from a value lower than the first threshold value to a value higher than the first threshold value, the opening / closing member 51 switches from the closed state to the open state. Here, when the opening / closing member 51 is in the open state, the opening / closing member 51 opens the discharge port 33. When the opening / closing member 51 is in the closed state, the opening / closing member 51 closes the discharge port 33. Therefore, the heat exchanger 21 cools the liquid appropriately. When the temperature of the liquid drops from a value higher than the second threshold value to a value lower than the second threshold value, the opening / closing member 51 switches from the open state to the closed state. Therefore, the air resistance of the straddle-type vehicle 1 decreases appropriately. As described above, the control unit 90 controls the opening / closing member 51 appropriately.

[0202] The control unit 90 adjusts the opening degree of the opening / closing member 51. Here, the opening degree of the opening / closing member 51 is one of the factors of the amount of air passing through the heat exchanger 21. Therefore, when the opening / closing member 51 opens the discharge port 33, the control unit 90 adjusts the amount of air passing through the heat exchanger 21.

[0203] In response to at least any one of the detection result of the outside air temperature, the detection result of the throttle opening degree, and the detection result of the speed of the straddle-type vehicle 1, the control unit 90 adjusts the opening degree of the opening / closing member 51. Here, the detection result of the outside air temperature is one of the factors of the temperature of the air passing through the heat exchanger 21. The detection result of the throttle opening degree is one of the factors of the temperature of the liquid in the heat exchanger 21. The speed of the straddle-type vehicle 1 is one of the factors of the amount of air passing through the heat exchanger 21. Therefore, when the opening / closing member 51 opens the discharge port 33, the control unit 90 appropriately adjusts the amount of air passing through the heat exchanger 21.

[0204] The straddle-type vehicle 1 is provided with at least any one of an outside air temperature detector 82, a throttle opening detector 83, and a vehicle speed detector 84. Therefore, it is easy for the control unit 90 to adjust the opening degree of the opening / closing member 51 according to at least any one of the detection result of the outside air temperature, the detection result of the throttle opening degree, and the detection result of the speed of the straddle-type vehicle 1.

[0205] Control example 2 has the following effects. That is, when the opening / closing member 51 opens the discharge port 33, the higher the outside air temperature, the greater the opening degree of the opening / closing member 51 that the control unit 90 makes. When the opening / closing member 51 opens the discharge port 33, the lower the outside air temperature, the smaller the opening degree of the opening / closing member 51 that the control unit 90 makes. For example, when the outside air temperature is relatively high, the temperature of the air passing through the heat exchanger 21 is high, and the amount of air passing through the heat exchanger 21 is large. Therefore, when the outside air temperature is relatively high, the heat exchanger 21 cools the liquid appropriately. For example, when the outside air temperature is relatively low, the temperature of the air passing through the heat exchanger 21 is low, and the amount of air passing through the heat exchanger 21 is small. Therefore, when the outside air temperature is relatively low, the heat exchanger 21 cools the liquid appropriately. Thus, regardless of the outside air temperature, the heat exchanger 21 cools the liquid appropriately. As described above, the control unit 90 appropriately adjusts the opening degree of the opening / closing member 51.

[0206] Control example 3 has the following effects. That is, when the opening / closing member 51 opens the discharge port 33, the greater the throttle opening degree, the greater the opening degree of the opening / closing member 51 that the control unit 90 makes. When the opening / closing member 51 opens the discharge port 33, the smaller the throttle opening degree, the smaller the opening degree of the opening / closing member 51 that the control unit 90 makes. For example, when the throttle opening degree is relatively large, the temperature of the liquid in the heat exchanger 21 is high, and the amount of air passing through the heat exchanger 21 is large. Therefore, when the throttle opening degree is relatively large, the heat exchanger 21 cools the liquid appropriately. For example, when the throttle opening degree is relatively small, the temperature of the liquid in the heat exchanger 21 is low, and the amount of air passing through the heat exchanger 21 is small. Therefore, when the throttle is relatively small, the heat exchanger 21 cools the liquid appropriately. Thus, regardless of the throttle opening degree, the heat exchanger 21 cools the liquid appropriately. As described above, the control unit 90 appropriately adjusts the opening degree of the opening / closing member 51.

[0207] Control example 4 has the following effects. That is, when the opening / closing member 51 opens the discharge port 33, the greater the throttle opening, the smaller the control unit 90 makes the opening degree of the opening / closing member 51. For example, when the throttle opening is relatively large, the temperature of the liquid in the heat exchanger 21 is high, and the amount of air passing through the heat exchanger 21 is small. Therefore, when the throttle opening is relatively large, the reduction of the air resistance of the saddle-riding type vehicle 1 is prioritized over the cooling of the liquid by the heat exchanger 21. In other words, when the throttle opening is relatively large, the acceleration of the saddle-riding type vehicle 1 is prioritized over the cooling of the liquid by the heat exchanger 21. As described above, the control unit 90 appropriately adjusts the opening degree of the opening / closing member 51.

[0208] Control example 5 has the following effects. That is, when the opening / closing member 51 opens the discharge port 33, the greater the speed of the saddle-riding type vehicle 1, the smaller the control unit 90 makes the opening degree of the opening / closing member 51. When the opening / closing member 51 opens the discharge port 33, the lower the speed of the saddle-riding type vehicle 1, the greater the control unit 90 makes the opening degree of the opening / closing member 51. For example, when the speed of the saddle-riding type vehicle 1 is relatively high, the amount of air passing through the heat exchanger 21 is not excessively large. Therefore, when the speed of the saddle-riding type vehicle 1 is relatively high, the heat exchanger 21 appropriately cools the liquid. For example, when the speed of the saddle-riding type vehicle 1 is relatively low, the amount of air passing through the heat exchanger 21 is not excessively small. Therefore, when the speed of the saddle-riding type vehicle 1 is relatively low, the heat exchanger 21 appropriately cools the liquid. Thus, regardless of the speed of the saddle-riding type vehicle 1, the heat exchanger 21 appropriately cools the liquid. As described above, the control unit 90 appropriately adjusts the opening degree of the opening / closing member 51.

[0209] Control Example 6 has the following effects. That is, when the opening / closing member 51 opens the discharge port 33, the higher the temperature of the catalyst device 8, the greater the opening degree of the opening / closing member 51 that the control unit 90 makes. When the opening / closing member 51 opens the discharge port 33, the lower the temperature of the catalyst device 8, the smaller the opening degree of the opening / closing member 51 that the control unit 90 makes. For example, when the temperature of the catalyst device 8 is relatively high, the amount of air flowing around the catalyst device 8 is not excessively small. Therefore, when the temperature of the catalyst device 8 is relatively high, the temperature of the catalyst device 8 does not become excessively high. For example, when the temperature of the catalyst device 8 is relatively low, the amount of air flowing around the catalyst device 8 is not excessively large. Therefore, when the temperature of the catalyst device 8 is relatively low, the temperature of the catalyst device 8 does not become excessively low. Thus, the temperature of the catalyst device 8 is appropriately adjusted. Therefore, the catalyst device 8 always preferably exhibits the function of purifying the exhaust gas. As described above, the control unit 90 appropriately adjusts the opening degree of the opening / closing member 51.

[0210] 4. Modified Embodiment This invention is not limited to the above-described embodiment and can be modified as follows.

[0211] (1) In the above-described embodiment, the straddle-type vehicle 1 includes one heat exchanger 21. In other words, the number of heat exchangers 21 provided in the straddle-type vehicle 1 is one. However, the number of heat exchangers 21 is not limited to this. The straddle-type vehicle 1 may include a plurality of heat exchangers 21. In other words, the number of heat exchangers 21 provided in the straddle-type vehicle 1 may be two or more.

[0212] FIG. 8 is a left side view of the straddle-type vehicle 1 according to the modified embodiment. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

[0213] In this modified embodiment, the straddle-type vehicle 1 includes a plurality of heat exchangers 21 and 22. For convenience, the heat exchanger 21 is referred to as the "first heat exchanger 21", and the heat exchanger 22 is referred to as the "second heat exchanger 22". The first heat exchanger 21 is, for example, a radiator. The liquid flowing through the first heat exchanger 21 is, for example, cooling water. The first heat exchanger 21 cools the cooling water. The second heat exchanger 22 is, for example, an oil cooler. The liquid flowing through the second heat exchanger 22 is, for example, engine oil. The engine oil is, for example, the lubricating oil of the power unit 7. The second heat exchanger 22 cools the engine oil. The second heat exchanger 22 is disposed below the first heat exchanger 21.

[0214] The straddle-type vehicle 1 includes a plurality of discharge ports 33 and 35. The discharge ports 33 and 35 are provided for each of the plurality of heat exchangers 21 and 22. For convenience, the discharge port 33 is referred to as the "first discharge port 33", and the discharge port 35 is referred to as the "second discharge port 35". Specifically, the first discharge port 33 is provided for the first heat exchanger 21. The first discharge port 33 discharges the air that has passed through the first heat exchanger 21. The second discharge port 35 is provided for the second heat exchanger 22. The second discharge port 35 discharges the air that has passed through the second heat exchanger 22.

[0215] The second discharge port 35 is disposed behind the second heat exchanger 22. All of the second discharge port 35 is disposed behind all of the second heat exchanger 22. The second discharge port 35 does not have a portion located in front of the second heat exchanger 22. For this reason, the second discharge port 35 does not overlap the second heat exchanger 22 in a side view of the vehicle. The air that has passed through the second heat exchanger 22 is discharged from the second discharge port 35 to the outside of the cowl 31.

[0216] The second discharge port 35 is disposed in front of the power unit 7. The second discharge port 35 is disposed in front of the catalytic device 8.

[0217] The second discharge port 35 includes a second left discharge port 36L. The second left discharge port 36L is provided in the left cover 41L. The second left discharge port 36L penetrates the left cover 41L.

[0218] The left cover 41L has a second left recess 46L. The second left recess 46L is recessed rightward. The second left recess 46L is disposed rearward of the second heat exchanger 22.

[0219] The second left discharge port 36L is disposed in the second left recess 46L. The second left discharge port 36L is disposed at the front portion of the second left recess 46L. The second left discharge port 36L extends in the width direction Y.

[0220] The second left recess 46L has a second left guide wall 47L. The second left guide wall 47L extends rearward and leftward from the right end of the second left discharge port 36L. The second left guide wall 47L guides air rearward and leftward from the second left discharge port 36L.

[0221] The straddle-type vehicle 1 includes a plurality of opening / closing members 51, 55. For convenience, the opening / closing member 51 is referred to as the "first opening / closing member 51". The opening / closing member 55 is referred to as the "second opening / closing member 55". The opening / closing members 51, 55 are provided at the first discharge port 33 and the second discharge port 35. Specifically, the first opening / closing member 51 is provided at the first discharge port 33. The first opening / closing member 51 can open and close the first discharge port 33. The second opening / closing member 55 is provided at the second discharge port 35. The second opening / closing member 55 can open and close the second discharge port 35.

[0222] The second opening / closing member 55 is disposed rearward of the second heat exchanger 22. All of the second opening / closing member 55 is disposed rearward of the second heat exchanger 22. The second opening / closing member 55 does not have a portion positioned forward of the second heat exchanger 22. Therefore, the second opening / closing member 55 does not overlap with the second heat exchanger 22 in a side view of the vehicle.

[0223] The second opening / closing member 55 includes a second left opening / closing member 56L. The second left opening / closing member 56L can open and close the second left discharge port 36L. The second left opening / closing member 56L is provided at the second left discharge port 36L.

[0224] The second discharge port 35 includes a second right discharge port (not shown). The second right discharge port is formed in the right cover 41R. The second right discharge port is formed symmetrically with the second left discharge port 36L in the left-right direction.

[0225] The second opening / closing member 55 includes a second right opening / closing member (not shown). The second right opening / closing member can open and close the second right discharge port. The second right opening / closing member is configured symmetrically with the second left opening / closing member 56L in the left-right direction.

[0226] As described above, also according to this modified embodiment, the air resistance of the straddle-type vehicle 1 can be appropriately reduced, and the cooling efficiency of the heat exchangers 21 and 22 can be improved.

[0227] The discharge ports 33 and 35 are provided for each of the plurality of heat exchangers 21 and 22. The opening / closing members 51 and 55 are provided for each of the discharge ports 33 and 35. Therefore, it is easy to individually adjust the amount of air passing through each of the heat exchangers 21 and 22. Thus, it is easy to individually cool the liquids of the plurality of heat exchangers 21 and 22.

[0228] In this modified embodiment, the temperature detector 81 may detect the temperature of the liquid in the first heat exchanger 21 and the temperature of the liquid in the second heat exchanger 22. In this modified embodiment, based on the temperature of the liquid in the first heat exchanger 21 detected by the temperature detector 81, the control unit 90 may control the opening / closing member 51. Based on the temperature of the liquid in the second heat exchanger 22 detected by the temperature detector 81, the control unit 90 may control the opening / closing member 55.

[0229] A control example in which the control unit 90 controls the opening / closing member 55 will be described. For convenience, the liquid in the second heat exchanger 22 is referred to as "engine oil".

[0230] For example, when the temperature of the engine oil rises from a value lower than the first threshold to a value higher than the first threshold, the control unit 90 switches the second opening / closing member 55 from the closed state to the open state. Specifically, when the temperature of the engine oil rises from a value lower than the first threshold to a value higher than the first threshold, the control unit 90 switches the second left opening / closing member 56L and the first right opening / closing member from the closed state to the open state. Here, the first threshold is for the engine oil. The first threshold for the engine oil is, for example, 120°C.

[0231] When the temperature of the engine oil rises from a value lower than the first threshold value to a value higher than the first threshold value, the second opening / closing member 55 switches from the closed state to the open state. When the second opening / closing member 55 switches from the closed state to the open state, the amount of air passing through the heat exchanger 22 increases. For this reason, the temperature of the engine oil does not become excessively high.

[0232] For example, when the temperature of the engine oil drops from a value higher than the second threshold value to a value lower than the second threshold value, the control unit 90 switches the second opening / closing member 55 from the open state to the closed state. Specifically, when the temperature of the engine oil drops from a value higher than the second threshold value to a value lower than the second threshold value, the control unit 90 switches the second left opening / closing member 56L and the second right opening / closing member from the open state to the closed state. The second threshold value is for the engine oil. The second threshold value for the engine oil is lower than the first threshold value for the engine oil. The second threshold value for the engine oil is, for example, 100°C.

[0233] When the temperature of the engine oil drops from a value higher than the second threshold value to a value lower than the second threshold value, the opening / closing member 55 switches from the open state to the closed state. When the opening / closing member 55 switches from the open state to the closed state, the amount of air passing through the heat exchanger 22 significantly decreases. For this reason, the temperature of the engine oil does not become excessively low. Furthermore, the air resistance of the straddle-type vehicle 1 due to the air passing through the heat exchanger 22 significantly decreases.

[0234] (2) In the above-described embodiment, the heat exchanger 21 includes a radiator. However, the configuration of the heat exchanger 21 is not limited to this. For example, the heat exchanger 21 may include at least either a radiator or an oil cooler. When the heat exchanger 21 includes a radiator, the opening / closing member 51 adjusts the amount of air passing through the radiator. When the heat exchanger 21 includes an oil cooler, the opening / closing member 51 adjusts the amount of air passing through the oil cooler.

[0235] (3) In the above-described embodiment, the liquid of the heat exchanger 21 is cooling water. However, the liquid of the heat exchanger 21 is not limited to this. For example, the liquid flowing through the heat exchanger 21 may contain at least one of cooling water and engine oil. When the liquid of the heat exchanger 21 is cooling water, the heat exchanger 21 cools the cooling water. When the liquid of the heat exchanger 21 is engine oil, the heat exchanger 21 cools the engine oil.

[0236] (4) In the above-described embodiment, a part of the catalyst device 8 does not overlap with the cowl 31 in a side view of the vehicle. That is, in the embodiment, at least a part of the catalyst device 8 is not disposed within the cowl 31. However, the arrangement of the catalyst device 8 is not limited to this. For example, as shown in FIG. 8, all of the catalyst device 8 may overlap with the cowl 31 in a side view of the vehicle. For example, all of the catalyst device 8 may be disposed within the cowl 31. In this modified embodiment, the control unit 90 more suitably adjusts the amount of air flowing around the catalyst device 8 by controlling the opening and closing member 51. Therefore, the control unit 90 can more suitably manage the temperature of the catalyst device 8. For example, when the control unit 90 causes the opening and closing member 51 to close the discharge port 33, the temperature of the catalyst device 8 rapidly rises. For example, when the control unit 90 causes the opening and closing member 51 to open the discharge port 33, the temperature of the catalyst device 8 rapidly decreases. Therefore, it is easier for the catalyst device 8 to exhibit the function of purifying the exhaust gas.

[0237] (5) In the above-described embodiment, the saddle-type vehicle 1 includes an engine (internal combustion engine) as the power unit 7. However, it is not limited to this. For example, the saddle-type vehicle 1 may include an electric motor as the power unit 7 in addition to the engine. For example, the saddle-type vehicle 1 may include an electric motor as the power unit 7 instead of the engine.

[0238] (6) In the above-described embodiment, all of the opening / closing member 51 is disposed behind all of the heat exchanger 21. However, the arrangement of the opening / closing member 51 is not limited thereto. For example, the opening / closing member 51 may include a portion located to the right or left of the heat exchanger 21. For example, the opening / closing member 51 may include a portion located in front of the rear end of the heat exchanger 21. For example, the opening / closing member 51 may overlap the heat exchanger 21 in a side view of the vehicle.

[0239] (7) In the above-described embodiment, the opening / closing member 51 is rotatable with respect to the cowl 31. However, the configuration of the opening / closing member 51 is not limited thereto. For example, it may be slidable with respect to the cowl 31. For example, the opening / closing member 51 is movable between a first position and a second position. When the opening / closing member 51 is in the first position, the opening / closing member 51 closes the discharge port 33. The first position is located at the discharge port 33. When the opening / closing member 51 is in the second position, the opening / closing member 51 opens the discharge port 33. The second position is located, for example, in front of the discharge port 33. The second position is located, for example, on the side of the heat exchanger 21. The second position is located, for example, in the space between the heat exchanger 21 and the cowl 31. In this modified embodiment, the space between the cowl 31 and the heat exchanger 21 can be effectively utilized.

[0240] (8) In the above-described embodiment, the first left opening / closing member 52L includes two plates 53La and 53Lb. However, the configuration of the first left opening / closing member 52L is not limited thereto. For example, the first left opening / closing member 52L may be constituted by only one plate 53La.

[0241] In the above-described embodiment, the first right opening / closing member 52R includes two plates 53Ra and 53Rb. However, the configuration of the first right opening / closing member 52R is not limited thereto. For example, the first right opening / closing member 52R may be constituted by only one plate 53Ra.

[0242] (9) In the above-described embodiment, the straddle-type vehicle 1 includes an outside air temperature detector 82, a throttle opening detector 83, and a vehicle speed detector 84. However, the configuration of the straddle-type vehicle 1 is not limited to this. For example, the straddle-type vehicle 1 may include at least any one of the outside air temperature detector 82, the throttle opening detector 83, and the vehicle speed detector 84.

[0243] (10) Regarding the above-described embodiment and each of the modified embodiments described in the above (1) to (9), each configuration may be appropriately changed by replacing or combining it with the configuration of other modified embodiments.

Explanation of Reference Numerals

[0244] 1: Straddle-type vehicle 2: Vehicle body frame 7: Power unit 8: Catalytic device 21: Heat exchanger (first heat exchanger) 21a: Left end 21b: Right end 22: Heat exchanger (second heat exchanger) 23: Pipeline 24: Flow path 31: Cowl 32: Inlet 33: Outlet (first outlet) 34L: First left outlet 34La: Right end 34R: First right outlet 34Ra: Left end 35: Outlet (second outlet) 36L: Second left outlet 41L: Left cover 41R: Right cover 42L: First left recess 42R: First right recess 43L: First left guide wall 43R: First right guide wall 46L: Second left recess 47L: Second left guide wall 48: Front cover 49: Lower cover 51: Opening and closing member (first opening and closing member) 52L: First left opening and closing member 52R: First right opening and closing member 53La: Plate 53Lb: Plate 53Ra: Plate 53Rb: Plate 55: Opening and closing member (second opening and closing member) 56L: Second left opening and closing member 61: Driving part 62L: First left driving part 63: Motor 64: Transmission mechanism 81: Temperature detector 82: Outside air temperature detector 83: Throttle opening detector 84: Vehicle speed detector 86: Catalyst temperature detector 90: Control unit

Claims

1. A power unit, A heat exchanger disposed forward of the power unit, A cowl that overlaps the heat exchanger in a side view of the saddle-type vehicle, the cowl having an inlet disposed forward of the heat exchanger and an outlet disposed rearward of the heat exchanger, An opening / closing member capable of opening and closing the outlet, A temperature detector that detects the temperature of the liquid flowing in the heat exchanger, A control unit that controls the opening / closing member based on the detection result of the temperature detector, Comprising A saddle-type vehicle.

2. In the saddle-type vehicle according to Claim 1, The opening / closing member is disposed rearward of the heat exchanger A saddle-type vehicle.

3. In the saddle-type vehicle according to Claim 1, The cowl is A left cover disposed to the left of the heat exchanger and extending in the longitudinal direction of the saddle-type vehicle, A right cover disposed to the right of the heat exchanger and extending in the longitudinal direction of the saddle-type vehicle, Comprising The inlet is disposed to the right of the left cover and to the left of the right cover, The outlet is A first left outlet penetrating the left cover, A first right outlet penetrating the right cover, Comprising The opening / closing member is A first left opening / closing member that opens and closes the first left outlet, A first right opening / closing member that opens and closes the first right outlet, Comprising A saddle-type vehicle.

4. In the saddle-type vehicle according to Claim 3, The left cover has a first left concave portion that is recessed toward the right. The first left discharge port is disposed in the first left concave portion. The right cover has a first right concave portion that is recessed toward the left. The first right discharge port is disposed in the first right concave portion. A saddle-type vehicle.

5. In the saddle-type vehicle according to claim 4, The first left discharge port is disposed at the front portion of the first left concave portion and extends in the width direction of the saddle-type vehicle. The first left concave portion includes a first left guide wall that extends rearward and leftward from the right end of the first left discharge port. The first right discharge port is disposed at the front portion of the first right concave portion and extends in the width direction of the saddle-type vehicle. The first right concave portion includes a first right guide wall that extends rearward and rightward from the left end of the first right discharge port. A saddle-type vehicle.

6. In the saddle-type vehicle according to claim 5, The right end of the first left discharge port is located to the right of the left end of the heat exchanger. The left end of the first right discharge port is located to the left of the right end of the heat exchanger. A saddle-type vehicle.

7. In the saddle-type vehicle according to claim 3, The cowl includes a lower cover that is disposed below the heat exchanger. The lower cover connects the left cover and the right cover. A saddle-type vehicle.

8. In the saddle-type vehicle according to claim 1, The opening and closing member is disposed in front of the power unit. A saddle-type vehicle.

9. In the saddle-type vehicle according to claim 1, The cowl overlaps the power unit in a side view of the saddle-type vehicle. Straddle-type vehicle.

10. In the straddle-type vehicle according to claim 1, the cowl extends from a position higher than the heat exchanger to a position lower than the power unit Straddle-type vehicle.

11. In the straddle-type vehicle according to claim 1, the heat exchanger includes at least one of a radiator and an oil cooler Straddle-type vehicle.

12. In the straddle-type vehicle according to claim 1, it is provided with a catalyst device that overlaps the cowl in a side view of the straddle-type vehicle Straddle-type vehicle.

13. In the straddle-type vehicle according to claim 1, when the temperature of the liquid rises from a value lower than the first threshold value to a value higher than the first threshold value, the control unit switches the opening / closing member from the closed state to the open state, when the temperature of the liquid drops from a value higher than the second threshold value to a value lower than the second threshold value, the control unit switches the opening / closing member from the open state to the closed state, the second threshold value is lower than the first threshold value Straddle-type vehicle.

14. In the straddle-type vehicle according to claim 1, it is provided with at least one of an outside air temperature detector for detecting the outside air temperature, a throttle opening detector for detecting the opening of the throttle, and a vehicle speed detector for detecting the speed of the straddle-type vehicle, the control unit adjusts the opening degree of the opening / closing member according to at least one of the detection result of the outside air temperature by the outside air temperature detector, the detection result of the throttle opening by the throttle opening detector, and the detection result of the speed of the straddle-type vehicle by the vehicle speed detector Straddle-type vehicle.

15. In the straddle-type vehicle according to claim 1, A plurality of the heat exchangers are provided, the discharge port is provided for each of the plurality of the heat exchangers, and the opening and closing member is provided for each of the plurality of the discharge ports A straddle-type vehicle.

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