Control method, control device, and saddle-type vehicle

Abstract

To provide a technique that makes it easy to change shift stages of a speed change gear of a saddle riding type vehicle even if the saddle riding type vehicle stops during coasting.SOLUTION: A control method for controlling coasting of a saddle riding type vehicle includes: a first detection step of detecting a disconnection state of a clutch of the saddle riding type vehicle; a second detection step of detecting a throttle opening of the saddle riding type vehicle; a starting step of stopping an engine of the saddle riding type vehicle to start the coasting when the disconnection of the clutch is detected in the first detection step and a throttle opening less than a predetermined opening is detected in the second detection step; a prediction step of predicting whether or not the saddle riding type vehicle is to stop during execution of the coasting; and a restarting step of restarting the engine when it is predicted in the prediction stage that the saddle riding type vehicle is to stop.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a control method and device for controlling the coasting of a saddle-ride type vehicle, and a saddle-ride type vehicle equipped with the same. [Background technology]

[0002] Patent Document 1 proposes a technique for improving fuel economy by controlling coasting in a vehicle having a manual transmission and clutch. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2012 / 070131 Summary of the Invention [Problem to be solved by the invention]

[0004] It is desirable to apply the coasting (also called coasting) as described in Patent Document 1 not only to four-wheeled vehicles but also to saddle-type vehicles such as motorcycles. By applying coasting to a saddle-type vehicle, the fuel efficiency of the saddle-type vehicle can be improved. However, in a saddle-type vehicle, if the saddle-type vehicle stops while coasting with the engine stopped, it may become difficult to change the gear position in the transmission.

[0005] Therefore, an object of the present invention is to provide a technique that enables a gear change to be performed normally in a saddle-type vehicle even if the saddle-type vehicle stops while coasting is being performed. [Means for solving the problem]

[0006] In order to achieve the above object, a control method according to one aspect of the present invention comprises: Equipped with a manual transmission with multiple gearsA control method for controlling coasting of a saddle-riding type vehicle, comprising: a first detection step of detecting a disengaged state of a clutch of the saddle-riding type vehicle; a second detection step of detecting a throttle opening of the saddle-riding type vehicle; a start step of starting the coasting by stopping an engine of the saddle-riding type vehicle when the first detection step detects that the clutch is disengaged and the second detection step detects that the throttle opening is less than a predetermined opening; a prediction step of predicting whether the saddle-riding type vehicle will stop while the coasting is being performed; and a restart step of restarting the engine when the prediction step predicts that the saddle-riding type vehicle will stop. Effect of the Invention

[0007] According to the present invention, for example, a technique can be provided that makes it easy to change the gear position of the transmission in a saddle-type vehicle even when the saddle-type vehicle stops while coasting. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an external view showing an example of a saddle-type vehicle. [Diagram 2] A block diagram showing an example of the configuration of a control device. [Diagram 3] Flowchart showing coasting control of a saddle-type vehicle [Figure 4] Flowchart showing coasting control of a saddle-type vehicle [Diagram 5] FIG. 1 is a diagram for explaining an example of coasting control of a saddle-type vehicle; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiment, and includes changes and modifications of the configuration within the scope of the present invention. Furthermore, not all of the combinations of features described in the present embodiment are necessarily essential to the present invention. Note that the same components are given the same reference numbers and their description will be omitted.

[0010] A control device 100 according to an embodiment of the present invention will be described. The control device 100 is a device that controls coasting of a saddle-riding vehicle 10. Coasting refers to coasting in which the power transmission from a drive source (engine) to drive wheels (wheels) is interrupted by a clutch. In the case of this embodiment, coasting is performed by stopping the engine, which is the drive source. Examples of the saddle-riding vehicle 10 include motorcycles and three-wheeled vehicles. In this embodiment, a motorcycle will be described as an example of the saddle-riding vehicle 10.

[0011] FIG 1 is an external view (left side view) showing an example of a saddle-ride type vehicle 10 to which a control device 100 of this embodiment is applied (mounted). As shown in FIG 1, the saddle-ride type vehicle 10 includes an engine 11 and a transmission 12. The output of the engine 11 is transmitted to the transmission 12 via a clutch (not shown). The transmission 12 is a manual transmission having a plurality of speed stages (gear stages) with different gear ratios. In this embodiment, an example will be described in which the transmission 12 has 1st to 5th speed stages, but the present invention is not limited to this, and the transmission 12 may have any number of speed stages.

[0012] A clutch lever 14 for the driver (rider) to disengage the clutch (clutch operation) is provided near the left handle grip 13 of the saddle riding type vehicle 10. A shift pedal 15 for the driver to change gears in the transmission 12 is provided on the left side surface of the saddle riding type vehicle 10. When the driver operates the clutch lever 14 and the shift pedal 15, a shifter (not shown) operates accordingly, and the gear stage of the transmission 12 is changed (switched).

[0013] The right handle grip 16 of the saddle riding type vehicle 10 is configured to be rotatable so that the driver can operate the accelerator. That is, the handle grip 16 is configured as a throttle operation unit for adjusting the throttle opening in response to the rotation operation by the driver to control the output of the engine 11. In addition, a brake lever 17 for controlling the brakes of the saddle riding type vehicle 10 is provided near the handle grip 16.

[0014] 2 shows a block diagram illustrating an example of the configuration of the control device 100 of this embodiment. The control device 100 is a device that controls the coasting of the saddle riding type vehicle 10 by controlling the engine 11, and in this embodiment, may include a control unit 110, various sensors 120, and a notification unit 130. The control device 100 may be configured as a part of an ECU (Electronic Control Unit) provided in the saddle riding type vehicle 10.

[0015] The control unit 110 may include a processing unit 111, a storage unit 112, and an interface unit 113. The processing unit 111 is configured with a CPU (Central Processing Unit) and the like, and controls the coasting of the saddle riding type vehicle 10 based on the detection results of the various sensors 120. The storage unit 112 is configured with a RAM (Random Access Memory), a ROM (Read Only Memory), and the like, and stores a program for controlling the coasting of the saddle riding type vehicle 10. The program stored in the storage unit 112 may be read and executed by the processing unit 111. The interface unit 113 transmits and receives information and data to and from external devices such as the various sensors 120.

[0016] The various sensors 120 may include a clutch detection sensor 121, a throttle detection sensor 122, a gear detection sensor 123, a bank angle detection sensor 124, an engine speed sensor 125, and a vehicle speed sensor 126. Information indicating the detection results of the various sensors 120 may be supplied (transmitted) to the control unit 110. That is, the information indicating the detection results of the various sensors 120 may be supplied (transmitted) to the processing unit 111 via the interface unit 113.

[0017] The clutch detection sensor 121 (first detection unit) detects the disengaged state of the clutch of the saddle riding type vehicle 10. The clutch detection sensor 121 may be understood as detecting whether or not the clutch of the saddle riding type vehicle 10 is in a disengaged state based on the amount of operation of the clutch lever 14 by the driver. Furthermore, the throttle detection sensor 122 (second detection unit) detects the throttle opening degree of the saddle riding type vehicle 10. The throttle detection sensor 122 may be understood as detecting the throttle opening degree based on the amount of operation (amount of rotation) of the handle grip 16 by the driver.

[0018] The gear detection sensor 123 detects the gear selected by the driver (i.e., the current gear) from among a plurality of gears in the transmission 12 of the saddle riding type vehicle 10. The bank angle detection sensor 124 detects the bank angle of the saddle riding type vehicle 10. The engine rotation speed sensor 125 detects the rotation speed of the engine 11 of the saddle riding type vehicle 10. In addition, the vehicle speed sensor 126 detects the speed of the saddle riding type vehicle 10 (vehicle speed).

[0019] The notification unit 130 (notification unit) notifies (notifies) the driver of various information. The notification unit 130 may notify the driver of various information by displaying the various information on a display device (display) provided in the saddle riding type vehicle 10, or may notify the driver of various information by transmitting the various information to an information terminal owned by the driver. In the case of the present embodiment, the notification unit 130 is used to make a notification to instruct the driver to change the gear stage of the transmission 12 to a predetermined gear stage on the lower speed side. The predetermined gear stage may be set to a gear stage on the lower speed side (i.e., a high gear ratio side) among a plurality of gear stages in the transmission 12 that allows the saddle riding type vehicle 10 to start stably. The predetermined gear stage may be set to, for example, 1st gear or 1st to 2nd gear, but is not limited thereto.

[0020] In recent years, from the viewpoint of improving the fuel efficiency of the saddle riding vehicle 10, it is desired to apply coasting accompanied by stopping the engine 11 to the saddle riding vehicle 10. However, in the manual transmission 12 adopted in the saddle riding vehicle 10, a dog clutch (dog gear) consisting of a plurality of dowels (projections) provided between adjacent shift gears and corresponding dowel holes may generally be used. In the transmission 12 using the dog clutch, if the saddle riding vehicle 10 stops during coasting with the engine 11 stopped, a phenomenon occurs in which the dowels hit the side walls of the shift gears and dowel holes do not enter during shifting (so-called "dowel hit"), making it difficult to change the gear position in the transmission 12. For example, if coasting is performed with the transmission 12 in the fifth gear and the saddle riding vehicle 10 stops during coasting, it may be difficult to change the gear position of the transmission 12 from fifth gear to first gear.

[0021] Therefore, the control device 100 (control unit 110) of this embodiment predicts whether the saddle riding vehicle 10 will stop while coasting is being performed to stop the engine 11, and restarts the engine 11 when it is predicted that the saddle riding vehicle 10 will stop. As a result, even if the saddle riding vehicle 10 stops while coasting is being performed, the engine 11 is in a running state, so that it is possible to easily change the gear stage of the transmission 12. Here, "stopping of the saddle riding vehicle 10" is not limited to a state in which the saddle riding vehicle 10 is completely stopped (i.e., the speed of the saddle riding vehicle 10 is zero km / h), but may also include a state close to a complete stop, for example, a state in which the speed of the saddle riding vehicle 10 is slower than a stop determination threshold. The stop determination threshold is a threshold for determining that the saddle riding vehicle 10 is in a stopped state, and can be set to a value within a range of 3 to 5 km / h, for example. The speed (vehicle speed) of the saddle riding vehicle 10 is detected by a vehicle speed sensor 126.

[0022] An example of coasting control of the saddle riding type vehicle 10 will be described below with reference to Figs. 3 to 5. Figs. 3 to 4 are flowcharts showing coasting control of the saddle riding type vehicle 10. The flowcharts of Figs. 3 to 4 can be executed by the control unit 110 (processing unit 111). Fig. 5 is a diagram for explaining an example of coasting control of the saddle riding type vehicle 10. Fig. 5 shows the relationship between time and vehicle speed (speed of the saddle riding type vehicle 10) and the relationship between time and the rotation speed of the engine 11.

[0023] In step S101, the control unit 110 determines whether or not the clutch is disengaged by the clutch detection sensor 121. If the clutch is not disengaged, step S101 is repeated, and if the clutch is disengaged, the process proceeds to step S102. In step S102, the control unit 110 determines whether or not the throttle detection sensor 122 detects that the throttle opening is less than a predetermined throttle opening. If the throttle opening is equal to or greater than the predetermined throttle opening, the process returns to step S101, and if the throttle opening is less than the predetermined throttle opening, the process proceeds to step S103. Here, the predetermined throttle opening is a value (threshold) for determining that the throttle is closed, and can be set to, for example, zero or a value close to zero.

[0024] In step S103, the control unit 110 stops the engine 11 of the saddle riding type vehicle 10 and starts coasting. As shown in Fig. 5, the control unit 110 stops the engine 11 and starts coasting of the saddle riding type vehicle 10 at timing t1 when the clutch detection sensor 121 detects that the clutch has been disengaged and the throttle detection sensor 122 detects that the throttle opening is less than a predetermined opening.

[0025] In step S104, the control unit 110 controls the coasting of the saddle riding type vehicle 10. Details of the coasting control in step S104 are shown in Fig. 4. Hereinafter, the coasting control in step S104 will be described with reference to Fig. 4.

[0026] In step S111, the control unit 110 predicts whether the saddle riding type vehicle 10 will stop. For example, as shown in FIG. 5, the control unit 110 can predict that the saddle riding type vehicle 10 will stop when the vehicle speed detected by the vehicle speed sensor 126 becomes less than a threshold value TH. The threshold value TH can be set to any value that can predict the stop of the saddle riding type vehicle 10, and in this embodiment, it can be set to 10 km / h as an example. Here, the control unit 110 may predict the stop of the saddle riding type vehicle 10 based on the rate of decrease in the vehicle speed in addition to or instead of the vehicle speed (threshold value TH). For example, when the vehicle speed is decreasing at a certain rate of decrease as shown in FIG. 5, the control unit 110 can predict that the saddle riding type vehicle 10 will stop and the timing of the stop of the saddle riding type vehicle 10 based on the rate of decrease.

[0027] In step S112, the control unit 110 determines whether or not a stop of the saddle riding vehicle 10 was predicted in step S104. If a stop of the saddle riding vehicle 10 was not predicted (i.e., if it was predicted that the saddle riding vehicle 10 would not stop), the process proceeds to step S118, and if a stop of the saddle riding vehicle 10 was predicted, the process proceeds to step S113.

[0028] In step S113, the control unit 110 determines whether or not the gear stage of the transmission 12 detected by the gear stage detection sensor 123 while the engine 11 is stopped is a predetermined gear stage on the lower speed side. As described above, the predetermined gear stage can be set to a gear stage on the lower speed side (i.e., a high gear ratio side) among the multiple gear stages in the transmission 12 that allows the saddle riding type vehicle 10 to start stably. If the gear stage of the transmission 12 is the predetermined gear stage on the lower speed side, the process proceeds to step S118, and if the gear stage of the transmission 12 is not the predetermined gear stage on the lower speed side, the process proceeds to step S114.

[0029] In step S114, the control unit 110 issues a notification to the driver through the notification unit 130 to instruct the driver to change the gear stage of the transmission 12 to a predetermined gear stage on the lower side. The notification can be issued when restarting the engine 11. Next, in step S115, the control unit 110 restarts the engine 11. For example, as shown in FIG. 5, the control unit 110 restarts the engine 11 at timing t2 when the vehicle speed reaches the threshold value TH (i.e., when the vehicle speed becomes less than the threshold value TH). By restarting the engine 11 in this manner, it becomes possible to easily change the gear stage of the transmission 12 even when the saddle riding type vehicle 10 stops during coasting.

[0030] Here, steps S113 to S115 may be understood as a process of restarting the engine 11 in accordance with the gear position of the transmission 12 while the engine 11 is stopped. That is, when the control unit 110 determines that the gear position of the transmission 12 while the engine 11 is stopped is not a predetermined gear position on the lower speed side (No in S113), it issues a notification of an instruction to change the gear position (S114) and restarts the engine 11 (S115). On the other hand, when the control unit 110 determines that the gear position of the transmission 12 while the engine 11 is stopped is a predetermined gear position on the lower speed side (Yes in S113), it does not issue a notification of an instruction to change the gear position (S114) or restart the engine 11 (S115) even if it predicts that the saddle riding type vehicle 10 will stop (Yes in S112).

[0031] In addition, the rotation speed of the engine 11 when the engine 11 is restarted in step S115 may be changed according to the gear stage of the transmission 12 while the engine 11 is stopped. Specifically, the control unit 110 may change the rotation speed of the engine 11 when the engine 11 is restarted so that the rotation speed of the engine 11 becomes higher as the gear stage of the transmission 12 while the engine 11 is stopped becomes higher (i.e., the lower the gear ratio side). As an example, as shown in FIG. 5, the control unit 110 changes the rotation speed of the engine 11 when the engine 11 is restarted depending on whether the gear stage of the transmission 12 while the engine 11 is stopped is fourth gear or fifth gear. The higher the rotation speed of the engine 11 is, the shorter the time until the gear stage can be changed after the restart. Therefore, by setting the engine rotation speed higher as the gear stage is higher, the gear stage can be changed to a lower gear stage quickly. In addition, when the number of times of changing to a lower gear stage is not large, there is no need to unnecessarily increase the engine rotation speed, which is advantageous in terms of improving the fuel efficiency of the saddle riding type vehicle 10. However, the rotation speed of the engine 11 at the time of restart does not necessarily have to be changed depending on the gear position, and the engine rotation speed may be constant (for example, the idle rotation speed) regardless of the gear position.

[0032] In step S116, the control unit 110 determines whether or not a re-stop condition for stopping the engine 11 again is satisfied. Examples of the re-stop condition include a condition that the gear stage of the transmission 12 is changed to neutral by the driver's operation, or a condition that the gear stage of the transmission 12 is changed to a predetermined gear stage on the lower speed side. If the re-stop condition is not satisfied, step S116 is repeated, and if the re-stop condition is satisfied, the process proceeds to step S117. Here, in this step S116, even if the re-stop condition is not satisfied, the process may proceed to step S117 if a predetermined time has elapsed since the engine 11 was restarted in step S115.

[0033] In step S117, control unit 110 stops engine 11 again. Next, in step S118, control unit 110 determines whether or not a termination condition for terminating coasting is satisfied. The termination condition may be a condition that clutch detection sensor 121 detects clutch engagement, or a condition that throttle detection sensor 122 detects that the throttle opening is equal to or greater than a predetermined opening. If the termination condition is not satisfied, the process returns to step S111, and if the termination condition is satisfied, the process proceeds to step S105 in FIG. 3.

[0034] In step S105 in Fig. 3, the control unit 110 starts the engine 11 of the saddle riding type vehicle 10 to end coasting. Note that the flowcharts in Fig. 3 and Fig. 4 can be executed repeatedly. That is, when the flowchart in Fig. 3 ends, the flowchart in Fig. 3 can be started again.

[0035] As described above, the control device 100 of this embodiment predicts whether the saddle riding vehicle 10 will stop while coasting that stops the engine 11, and restarts the engine 11 when it is predicted that the saddle riding vehicle 10 will stop. This makes it easier to change the gear position of the transmission 12 even if the saddle riding vehicle 10 stops while coasting. Therefore, it becomes possible to apply coasting that involves stopping the engine 11 to the saddle riding vehicle 10, which is advantageous in terms of improving the fuel efficiency of the saddle riding vehicle 10.

[0036] <Summary of the embodiment> 1. The control method of the above embodiment is A control method for controlling coasting of a saddle-type vehicle (e.g., 10), comprising: A first detection step (e.g., S101) of detecting a disengaged state of the clutch of the saddle riding type vehicle; A second detection step (e.g., S102) of detecting a throttle opening degree of the saddle riding type vehicle; a starting step (e.g., S103) of starting the coasting by stopping an engine (e.g., 11) of the saddle riding type vehicle when the first detection step detects that the clutch has been disengaged and the second detection step detects that the throttle opening is less than a predetermined opening; a prediction step (e.g., S111) of predicting whether the saddle riding type vehicle will stop while the coasting is being performed; and a restarting step (eg, 115) of restarting the engine when the prediction step predicts that the saddle riding type vehicle will stop. According to this embodiment, even if the saddle riding type vehicle stops while coasting is being performed, it is possible to easily change the gear position of the transmission. Therefore, coasting that involves stopping the engine can be applied to the saddle riding type vehicle, which is advantageous in terms of improving the fuel efficiency of the saddle riding type vehicle.

[0037] 2. In the above embodiment, The saddle-type vehicle includes a manual transmission (e.g., 12) having a plurality of gear stages, In the restarting step, the engine is restarted in accordance with the gear position of the transmission while the engine is stopped. According to this embodiment, since restarting the engine is unnecessary depending on the gear position of the transmission while the engine is stopped, restarting the engine can be omitted in such cases, which is advantageous in terms of improving fuel efficiency of the saddle riding type vehicle.

[0038] 3. In the above embodiment, Even if the prediction process predicts that the saddle-type vehicle will stop, the restart process is not executed if the gear stage of the transmission while the engine is stopped is a predetermined gear stage on the low speed side. According to this embodiment, if the gear of the transmission is at a predetermined lower gear while the engine is stopped, restarting the engine is unnecessary, and in such a case, restarting the engine can be omitted, which is advantageous in terms of improving the fuel efficiency of the saddle-type vehicle.

[0039] 4. In the above embodiment, In the restarting step, the rotation speed of the engine when the engine is restarted is changed according to the gear position of the transmission while the engine is stopped. According to this embodiment, the engine can be efficiently restarted at a rotation speed that corresponds to the gear position of the transmission while the engine is stopped, which is advantageous in terms of improving the fuel efficiency of the saddle-type vehicle.

[0040] 5. In the above embodiment, In the restarting step, the rotation speed of the engine when the engine is restarted is changed so that the rotation speed of the engine becomes higher as the gear stage of the transmission becomes higher while the engine is stopped. According to this embodiment, the engine can be efficiently restarted at a rotation speed that corresponds to the gear position of the transmission while the engine is stopped, which is advantageous in terms of improving the fuel efficiency of the saddle-type vehicle.

[0041] 6. In the above embodiment, The method further includes a restart step (for example, S116 to S117) of stopping the engine again when the gear stage of the transmission becomes neutral or a predetermined gear stage on the low speed side after the engine is restarted in the restart step. According to this embodiment, the engine is stopped again when the transmission reaches an appropriate gear, which is advantageous in terms of improving fuel efficiency of the saddle-type vehicle.

[0042] 7. In the above embodiment, In the restart process, the engine is stopped again when a predetermined time has elapsed since the engine was restarted in the restart process, even if the gear stage of the transmission has not become neutral or the predetermined gear stage. According to this embodiment, even if the transmission is not in neutral or a predetermined gear position, the engine is stopped again depending on the time, which is advantageous in terms of improving fuel efficiency of the saddle-type vehicle.

[0043] 8. In the above embodiment, The method further includes a notification step (e.g., S114) of issuing a notification to instruct a driver of the saddle riding type vehicle to change the gear stage of the transmission to a predetermined gear stage on the lower speed side when the engine is restarted in the restart step. According to this embodiment, it is possible to prompt the driver to change the gear position in the transmission.

[0044] 9. In the above embodiment, In the prediction step, it is predicted that the saddle riding type vehicle will stop when the speed of the saddle riding type vehicle becomes less than a threshold value (for example, TH). According to this embodiment, it is possible to accurately and precisely predict the stopping of the saddle riding type vehicle.

[0045] 10. In the above embodiment, The method further includes a termination process (steps S118, S105) of starting the engine and terminating the coasting when engagement of the clutch is detected during coasting or when it is detected that the throttle opening is equal to or greater than the predetermined opening. According to this embodiment, the coasting of the saddle riding type vehicle can be ended appropriately.

[0046] 11. The control device of the above embodiment is A control device (e.g., 100) for controlling coasting of a saddle-type vehicle (e.g., 10), A clutch detection means (e.g., 121) for detecting a disengaged state of the clutch of the saddle riding type vehicle; A throttle detection means (e.g., 122) for detecting a throttle opening of the saddle riding type vehicle; A control means (e.g., 110) for controlling the coasting; Equipped with The control means when the clutch detection means detects that the clutch has been disengaged and the throttle detection means detects that the throttle opening is less than a predetermined opening, the coasting is started by stopping an engine of the saddle riding type vehicle (e.g., S103); When it is predicted that the saddle riding type vehicle will stop while the coasting is being performed, the engine is restarted (for example, S111 to S115). According to this embodiment, even if the saddle riding type vehicle stops while coasting is being performed, it is possible to easily change the gear position of the transmission. Therefore, coasting that involves stopping the engine can be applied to the saddle riding type vehicle, which is advantageous in terms of improving the fuel efficiency of the saddle riding type vehicle.

[0047] The present invention is not limited to the above-described embodiments, and various modifications and variations are possible without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0048] 10: saddle-type vehicle, 11: engine, 12: transmission, 13: left handle grip, 14: clutch lever, 15: shift pedal, 16: right handle grip (throttle operation section), 17: brake lever, 100: control device, 110: control section, 120: various sensors, 121: clutch detection sensor, 122: throttle detection sensor, 123: gear stage detection sensor, 124: bank angle detection sensor, 125: engine rotation speed sensor, 126: vehicle speed sensor

Claims

1. A control method for controlling coasting of a saddle-type vehicle equipped with a manual transmission having multiple gear stages, comprising: a first detection step of detecting a disengaged state of the clutch of the saddle riding type vehicle; a second detection step of detecting a throttle opening degree of the saddle riding type vehicle; a starting step of starting the coasting by stopping an engine of the saddle riding type vehicle when the first detection step detects that the clutch has been disengaged and the second detection step detects that the throttle opening is less than a predetermined opening; a prediction step of predicting whether the saddle riding type vehicle will stop while the coasting is being performed; a restarting step of restarting the engine when it is predicted in the prediction step that the saddle riding type vehicle will be stopped; A control method comprising:

2. The control method described in Claim 1, characterized in that in the restart process, the engine is restarted according to the gear stage of the transmission while the engine is stopped.

3. 3. The control method according to claim 2, wherein even if the prediction step predicts that the saddle riding type vehicle will stop, the restart step is not executed if the gear stage of the transmission while the engine is stopped is a predetermined gear stage on the low speed side.

4. 4. The control method according to claim 2, wherein in the restarting step, a rotation speed of the engine when the engine is restarted is changed in accordance with a gear position of the transmission while the engine is stopped.

5. 5. The control method according to claim 4, wherein in the restarting step, the engine speed when restarting the engine is changed so that the engine speed becomes higher as the gear stage of the transmission while the engine is stopped becomes higher.

6. 4. The control method according to claim 2, further comprising a restart step of stopping the engine again when a gear position of the transmission becomes neutral or a predetermined gear position on a low speed side after the engine is restarted in the restart step.

7. 7. The control method according to claim 6, wherein in the restart process, the engine is stopped again when a predetermined time has elapsed since the engine was restarted in the restart process, even if the gear position of the transmission is not in neutral or the predetermined gear position.

8. 4. The control method according to claim 2, further comprising a notification step of issuing a notification to instruct a driver of the saddle riding type vehicle to change a gear stage of the transmission to a predetermined gear stage on a lower speed side when the engine is restarted in the restart step.

9. 4. The control method according to claim 1, wherein the prediction step predicts that the saddle riding type vehicle will stop when the speed of the saddle riding type vehicle becomes less than a threshold value.

10. 4. The control method according to claim 1, further comprising a termination step of starting the engine and terminating the coasting when engagement of the clutch is detected during coasting or when it is detected that the throttle opening is equal to or greater than the predetermined opening.

11. A control device for controlling coasting of a saddle-type vehicle equipped with a manual transmission having multiple gears, comprising: a clutch detection means for detecting a disengaged state of the clutch of the saddle riding type vehicle; a throttle detection means for detecting a throttle opening of the saddle riding type vehicle; A control means for controlling the coasting; Equipped with The control means when the clutch detection means detects that the clutch has been disengaged and the throttle detection means detects that the throttle opening is less than a predetermined opening, the coasting is started by stopping an engine of the saddle riding type vehicle; restarting the engine when it is predicted that the saddle riding type vehicle will stop during the execution of the coasting; A control device comprising:

12. A saddle-type vehicle comprising the control device according to claim 11.

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