Motorcycle

Abstract

The motorcycle-type vehicle has a control mechanism for automatically stopping and restarting the engine after automatic stop. When the manual transmission is engaged, the control mechanism restarts the engine based on at least the detection of a throttle opening operation and a clutch disengagement operation. Furthermore, for a predetermined period from the start of restart, if a throttle closing operation is detected, the control mechanism drives the engine at idle speed; otherwise, it drives the engine at a speed corresponding to the operation amount.

Description

Technical Field

[0001] This invention relates to a straddle-type vehicle. Background Technology

[0002] A motorcycle with an idle stop function has been proposed. In such a motorcycle, the engine automatically stops when the motorcycle is temporarily stopped while waiting at a green light, thus improving fuel efficiency. Patent Document 1 discloses an idle stop control technology for a motorcycle equipped with a manual transmission. In the control technology of Patent Document 1, the manual transmission automatically stops the engine while in gear, and requires throttle opening and clutch disengagement as conditions for engine restart. Therefore, after the engine automatically stops and restarts, it prevents the motorcycle from lurching forward abruptly and reflects the rider's starting intention.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 5750020 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] After the engine automatically stops, the rider's intention to restart the engine can be categorized into two situations: one is to start immediately, and the other is to restart the engine while preparing to start. In the latter case, if the engine is driven at high RPM, it can sometimes cause discomfort to the rider.

[0008] The purpose of this invention is to provide a straddle-type vehicle capable of engine restart control in accordance with the rider's intentions.

[0009] means for solving problems

[0010] According to the present invention,

[0011] A motorcycle (10) is provided, which includes:

[0012] Engine (40);

[0013] A manual transmission (42) is connected to the engine (40) via a clutch (43) to change the speed of the engine (40) and output the rotation.

[0014] Throttle valve operating element (80) which is capable of adjusting the throttle valve opening of the engine (40);

[0015] Clutch operating element (86) capable of operating the clutch (43) intermittently;

[0016] Throttle operation detection mechanism (110) detects the operation performed by the rider on the throttle operation component (80);

[0017] A clutch operation detection mechanism (111) detects the operation performed by the rider on the clutch operating member (86); and

[0018] The control mechanism (100) controls the automatic stop and restart of the engine (40) after automatic stop.

[0019] Its features are,

[0020] When the manual transmission (42) is in gear, the control mechanism (100) restarts the engine (40) at least on the condition that the throttle operation detection mechanism (110) detects the opening operation of the throttle valve (52) and the clutch operation detection mechanism (111) detects the disengagement operation of the clutch (43).

[0021] During a predetermined period from the start of restart, if the throttle operation detection mechanism (110) detects a closing operation of the throttle valve (52), the control mechanism (100) drives the engine (40) at idle speed; if the throttle operation detection mechanism (110) does not detect a closing operation of the throttle valve (52), the control mechanism (100) drives the engine (40) at a speed corresponding to the operation amount detected by the throttle operation detection mechanism (110).

[0022] Invention Effects

[0023] According to the present invention, a straddle-type vehicle capable of restarting the engine in accordance with the rider's intentions can be provided. Attached Figure Description

[0024] Figure 1 This is a left view of a straddle-type vehicle according to an embodiment of the present invention.

[0025] Figure 2 yes Figure 1 A top view of a straddle-type vehicle.

[0026] Figure 3 yes Figure 1 A block diagram of the control device for a straddle-type vehicle.

[0027] Figure 4 This is a flowchart representing a processing example executed by the control unit.

[0028] Figure 5 This is a flowchart representing a processing example executed by the control unit.

[0029] Figure 6 This is a flowchart representing a processing example executed by the control unit.

[0030] Figure 7 This is a flowchart representing a processing example executed by the control unit. Detailed Implementation

[0031] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Furthermore, the following embodiments are not intended to limit the invention to which the technical solution pertains. Additionally, not all combinations of features described in the embodiments are necessarily essential to the invention. Two or more features from the plurality of features described in the embodiments may be arbitrarily combined. Furthermore, identical or identical components are labeled with the same reference numerals, and repeated descriptions are omitted.

[0032] <Overview of motorcycle-type vehicles>

[0033] Figure 1 This is a left view of a straddle-type vehicle 10 according to one embodiment of the present invention. Figure 2 This is a top view of the straddle-type vehicle 10. Figure 3 This is a block diagram of the control device for the straddle-type vehicle 10. (Example) Figure 1 and Figure 2 As indicated by the arrows, the overall length direction of the vehicle is referred to as the front-to-back direction, the width direction as the left-to-right direction, and the height direction as the up-and-down direction. Sometimes, the straddle-type vehicle 10 is simply referred to as vehicle 10. Vehicle 10 is a bare-frame motorcycle, but the present invention can also be applied to various straddle-type vehicles, including other types of motorcycles.

[0034] Vehicle 10 has a double-cradle type body frame 12. The body frame 12 has a head tube 14, a pair of left and right main frames 16, and a lower frame 18. The pair of left and right main frames 16 branch off from the head tube 14 and extend slowly rearward and downward, and then extend downward via bends 16a. The lower frame 18 branches off from the head tube 14 and extends obliquely rearward below the main frames 16, and then extends generally horizontally rearward via bends 18a, connecting to the rear end of the main frames 16.

[0035] The vehicle body frame 12 also includes a pair of left and right seat frames 20, a pair of left and right pivot plates 22, and a pair of left and right reinforcing struts 24. The pair of left and right seat frames 20 extend slightly rearward and upward from near the bend 16a of the pair of left and right main frames 16. The pair of left and right pivot plates 22 are located near the rear end of the main frame 16. The pair of left and right reinforcing struts 24 extend obliquely rearward and upward from near the location of the pivot plates 22 on the main frame 16 and connect to the seat frames 20. Pivots 26 are provided on the pair of left and right pivot plates 22.

[0036] The left and right front forks 28 are rotatably supported by the head tube 14, and the handlebars 32 for steering are mounted on the upper end of the left and right front forks 28 via the top bridge 30a.

[0037] An instrument panel 34, including a speedometer, is mounted on the top bridge 30a. A headlight 36 illuminating the front of the vehicle 10 and a pair of left and right forward turn signals 37 are provided in front of the head tube 14. The front wheel WF is supported by a pair of left and right front forks 28 with rotatable axles, and a front fender 38 is provided on the upper part of the front wheel WF.

[0038] An engine 40 and a manual transmission 42 are disposed between the main frame 16 and the lower frame 18. The engine 40 is, for example, a single-cylinder, four-stroke, DOHC engine, equipped with a throttle valve 52 for adjusting the intake air volume, a fuel injection device (injector) 40b for injecting fuel, and an ignition device 40c for igniting the air-fuel mixture in the combustion chamber. A fuel tank 44 for holding the fuel supplied to the engine 40 is mounted above the engine 40 and above the front side of the main frame 16. An exhaust pipe 46 is mounted on the engine 40, and a muffler 48 is connected to the exhaust pipe 46. An oil cooler 50 is located in front of the engine 40 and in front of the lower frame 18. The throttle valve 52 of the engine 40 and an air filter 54 for purifying the air supplied to the engine 40 through the throttle valve 52 are located behind the engine 40.

[0039] Electric motor 41 is connected to engine 40. Electric motor 41 functions as a starter to start engine 40 and as an alternator that generates electricity driven by engine 40.

[0040] The manual transmission 42 is connected to the engine 40 via a clutch 43, changing the rotation of the engine 40 transmitted to the rear wheel WR and outputting power. The manual transmission 42 is a constantly engaged transmission that shifts between, for example, gear ratios from first to sixth and neutral, depending on the rider's operation of the gear shift pedal 88. Selecting any of the gear ratios from first to sixth is referred to as engaging a gear. The gear shift pedal 88 is a gear shifting mechanism located in front of the left footrest 64 in a manner operable by the rider. The rider places their left foot on the left footrest 64 and operates the gear shift pedal 88 with their left foot, thereby switching the state of the manual transmission 42. The clutch 43 is, for example, a wet multi-plate coil spring type manual clutch, which connects or disconnects the transmission of driving force between the engine 40 and the manual transmission 42.

[0041] The swing arm 56 is pivotally supported on a pair of left and right pivot plates 22 via a pivot 26 in a generally vertical direction. A rear shock absorber 58 is clamped between the upper rear end of the swing arm 56 and the seat frame 20. The rear wheel WR, which serves as the drive wheel, is rotatably supported at the rear end of the swing arm 56. The driving force of the engine 40 is transmitted to the rear wheel WR via a manual transmission 42 and a chain 60. A pair of left and right pedal holders 62 extending rearward are fixed to the pair of left and right pivot plates 22. Rider pedals 64 and passenger pedals 66 are mounted on the front and rear of the pair of left and right pedal holders 62, respectively.

[0042] A tandem seat 68 is installed behind the fuel tank 44 and on the upper part of the seat frame 20 for the rider and passenger to sit (straddle). The seat 68 is a tandem seat consisting of a rider seat 68a for the rider and a passenger seat 68b for the passenger. A pair of left and right handrails 70 for the passenger to hold onto and a rear turn signal 72 are installed at the rear of the seat frame 20. A rear fender 74 is located at the rear of the seat frame 20, and a taillight 76 is installed on the rear fender 74.

[0043] like Figure 2 As shown, a throttle handle 80 is provided on the right end of the handlebar 32, and is rotatable relative to the handlebar 32. The throttle handle 80 is configured to be operated by the rider, allowing the rider to adjust the opening of the throttle valve 52. In this embodiment, the throttle handle 80 and the throttle valve 52 are physically connected by a mechanical wire. However, a drive-by throttle method can also be used where the throttle handle 80 and the throttle valve 52 are not physically connected, and the rider's throttle operation (accelerator operation) is converted into an electrical signal to control the throttle valve.

[0044] A brake lever 82 is located on the handlebars 32, in front of the throttle handle 80. The brake lever 82 is a brake operating element that allows the rider to operate the front wheel brake 81, which applies braking force to the front wheel WF of the vehicle 10. The rider operates the brake lever 82 with their right hand, thereby activating the front wheel brake 81 located on the front wheel WF and applying braking force to the front wheel WF. The front wheel brake 81 is, for example, a disc brake.

[0045] A foot-operated brake pedal 84 is located in front of the right footrest 64. The foot-operated brake pedal 84 is a brake operating element that allows the rider to operate the rear wheel brake 83, which applies braking force to the rear wheel WR of the vehicle 10. The rider places their right foot on the right footrest 64 and operates the foot-operated brake pedal 84 with their right foot, thereby actuating the rear wheel brake 83, which applies braking force to the rear wheel WR. The rear wheel brake 83 is, for example, a disc brake.

[0046] Additionally, a clutch lever 86 is located on the handlebar 32, at the front of the left end. The clutch lever 86 is configured as a clutch operating element that allows the rider to operate the clutch 43 intermittently. When the rider pulls the clutch lever 86, the clutch 43 is disengaged; when released, it is engaged.

[0047] <Control Device>

[0048] Main reference Figure 3 The control device of vehicle 10 will be described. Vehicle 10 includes a control unit (ECU) 100. The control unit 100 includes a processor, such as a CPU, storage devices such as semiconductor memory, input / output interfaces for external devices, sensor signal processing circuits, and actuator drive circuits. The storage devices store the program executed by the processor and the data used by the processor during processing. Multiple processors and storage devices may be provided.

[0049] The control unit 100 acquires the detection results from various sensors 110-116 to control the engine 40 and the electric motor 41. The throttle operation sensor 110 detects the rider's operation of the throttle handle 80. It can be a sensor located on the throttle handle 80 to detect the amount of rotation of the throttle handle 80, or a sensor located on the throttle valve 52 to detect the throttle opening. The clutch operation sensor 111 detects the rider's operation of the clutch lever 86. It can be a sensor located on the clutch lever 86 to detect when the lever is pulled (disengagement operation), or a sensor located on the clutch 43 to detect the rotation of the clutch arm.

[0050] Brake operation sensor 112 is a sensor that detects the rider's operation of the foot-operated brake pedal 84. Engine speed sensor 113 is a sensor that detects the engine speed 40. Gear position sensor 114 is a sensor that detects the status of the manual transmission 42 (any one of first to sixth gear or neutral). Vehicle speed sensor 115 is a sensor that detects the vehicle speed 10, for example, a sensor that detects the rotation of the front wheel WF. Gradient sensor 116 is a sensor that detects the gradient of the road on which the vehicle 10 is traveling.

[0051] <Processing Example>

[0052] The control unit 100 performs idle stop control of the engine 40. In idle stop control, the engine 40 is automatically stopped when the vehicle 10 is temporarily stopped due to waiting for a green light, and the engine 40 is restarted when the vehicle 10 is presumed to start moving after the automatic stop. Figures 4-7 This is a flowchart illustrating a processing example of idle stop control executed by the processor of control unit 100.

[0053] Figure 4 This describes a processing example related to the automatic stop of engine 40. In S1, the detection results from each sensor are acquired. In S2, based on the detection results acquired in S1, it is determined whether a predetermined idle stop condition is met. If the idle stop condition is determined to be met, the process proceeds to S3.

[0054] As conditions for idling stop, examples include situations where the vehicle speed is below a specified speed (e.g., 3 km / h) and no throttle opening operation by the rider is detected within a specified time period (e.g., 3 seconds). Furthermore, examples include situations where, with the manual transmission 42 in gear, no clutch disengagement operation by the rider is detected within a specified time period (e.g., 3 seconds), and when the manual transmission 42 is in neutral, no clutch disengagement operation by the rider is detected within a specified time period (e.g., 3 seconds). Alternatively, conditions may include the headlight 36 being turned off and the rider's prior permission for idling stop control to be executed (by setting an idling stop switch to "on").

[0055] In S3, the engine 40 is automatically stopped. For example, the engine 40 can be stopped by cutting off the fuel supply based on the fuel injection device 40b, or by stopping the ignition based on the ignition device 40c.

[0056] Figure 5This describes a processing example when the engine 40 is restarted after automatic shutdown. In S11, the detection results from each sensor are acquired. In S12, the details of the process for determining whether the restart conditions are met will be described later. In S13, if the restart conditions are determined to be met in S12, the process proceeds to S14. In S14 to S17, settings related to the restart of the engine 40 are performed.

[0057] In S14, when the engine 40 is restarted, the electric motor 41 is driven as a starter to determine whether to assist in restarting. During the starting and restarting of the engine 40, the electric motor 41 is essentially driven as a starter to assist in starting the engine 40.

[0058] However, during the period of inertial motion before the vehicle 10 stops after the engine 40 automatically stops, there may be situations where the restart condition is met. For example, if a rider is slowly moving towards an intersection while waiting for a red light, and the light immediately turns green, the vehicle 10 may accelerate without stopping. In S14, based on the detection result of the engine speed sensor 113 obtained in S11, it is determined whether the engine speed of the engine 40 is above a threshold (e.g., 600 rpm). If it is above the threshold, proceed to S15; if it is below the threshold, proceed to S16. If the engine speed of the engine 40 is above the threshold, the engine 40 can be restarted even without driving the electric motor 41. Therefore, in S15, when the engine 40 restarts, the electric motor 41 is set not to operate as a starter. Since the automatic stop of the engine 40 also stops the power generation in the electric motor 41, there is concern about the reduction of the battery charge of the vehicle 10. However, by reducing the frequency of using the electric motor 41 during the restart of the engine 40, power consumption can be suppressed.

[0059] In S16, based on the detection result of the slope sensor 116 obtained in S11, it is determined whether the slope of the road on which the vehicle 10 is traveling is an uphill slope above a threshold. If the uphill slope is above the threshold, proceed to S17; if the uphill slope is below the threshold, proceed to S18. In S17, the target speed of the engine 40 upon restart is set higher than usual. For example, the idle speed is set to 1.2 times, or the engine speed is set to be higher than usual relative to the rider's throttle operation. The vehicle 10 of this embodiment is equipped with a manual clutch 43, which can prevent the engine 40 from stalling and the vehicle 10 from rolling backward when starting on an uphill road.

[0060] In S18, restart the engine 40. Details will be described later.

[0061] <Restart Decision Processing>

[0062] Reference Figure 6 An example of the restart determination process in S13 will be explained. In S21, based on the detection result of the clutch operation sensor 111 obtained in S11, it is determined whether the rider's disengagement operation on the clutch 43 has been detected. If it is detected, proceed to S22; if it is not detected, proceed to S27 and determine that the stop is maintained (restart condition is not met).

[0063] In S22, based on the detection result of the gear position sensor 114 obtained in S11, it is determined whether the manual transmission 42 is in gear or neutral. If it is in gear, proceed to S23; if it is in neutral, proceed to S26 and determine that the restart condition has been met. In this embodiment, if the manual transmission 42 is in neutral and there is a disengagement operation of the clutch 43, it is considered that the rider intends to restart the engine 40, and the engine 40 is restarted only as a condition based on this detection. However, other conditions may be added to the restart condition.

[0064] In S23, based on the detection result of the throttle operation sensor 110 obtained in S11, it is determined whether the rider's operation of opening the throttle 52 (rotating the throttle handle 80) has been detected. If detected, proceed to S24; if not detected, proceed to S27 and determine that the stop is maintained (restart condition is not met). When the manual transmission 42 is in gear, not only the disengagement operation of the clutch 43 is included in the restart condition, but also the opening operation of the throttle 52 is included in the restart condition. Therefore, if the rider intends to start immediately, the output of the engine 40 during restart is improved, and the engine 40 can be prevented from stalling.

[0065] In S24, based on the detection result of the slope sensor 116 obtained in S11, it is determined whether the slope of the road on which the vehicle 10 is traveling is an uphill slope above a threshold. If the uphill slope is above the threshold, proceed to S25; if the uphill slope is below the threshold, proceed to S26, and it is determined that the restart condition is met. The threshold here can be the same as or different from the threshold in S16. In S25, based on the detection result of the brake operation sensor 112 obtained in S11, it is determined whether the rider's operation on the rear wheel brake 83 is detected. If the operation is detected, proceed to S26, and it is determined that the restart condition is met; if no operation is detected, proceed to S27, and it is determined that the vehicle remains stopped (the restart condition is not met). By including the operation of the rear wheel brake 83 in the restart condition, it is possible to prevent the vehicle 10 from rolling backward on an uphill road when starting.

[0066] Furthermore, when the manual transmission 42 is in neutral, the detection of the operation of the rear wheel brake 83 is not included in the restart conditions. This is because, when the manual transmission 42 is in neutral, the gear shifting of the manual transmission 42 is subsequently performed by the left foot. However, when the manual transmission 42 is in neutral, the detection of the operation of the front wheel brake 81 can also be included in the restart conditions; in this case, a sensor that detects the rider's operation of the brake lever 82 can also be provided.

[0067] In this embodiment, when the manual transmission 42 is engaged, the operation of disengaging the clutch 43, the operation of opening the throttle valve 52, and the driving road being uphill are further set as restart conditions. However, the operation of the rear wheel brake 83 can also be excluded from the restart conditions. Alternatively, other conditions can be added to the restart conditions.

[0068] <Restart Processing>

[0069] Reference Figure 7 The restart process in S18 will be explained. In S31, the restart of engine 40 begins. If the non-operation setting of electric motor 41 in S15 is not configured, electric motor 41 is driven as a starter to supply fuel to fuel injection device 40b and ignite ignition device 40c to drive engine 40. If the non-operation setting of electric motor 41 in S15 is configured, engine 40 is driven without driving electric motor 41. Furthermore, if the target speed of engine 40 during restart is set higher than usual in S17, drive control is performed to reflect this situation.

[0070] In S32, based on the detection result of the gear position sensor 114 obtained in S11, it is determined whether the manual transmission 42 is restarting while in gear or in neutral. If it is restarting while in gear, proceed to S34; if it is restarting while in neutral, proceed to S33. In S33, the engine 40 is controlled to maintain an idle speed (e.g., around 1000 rpm).

[0071] In S34 to S37, processing is related to the control of the engine speed of 40 during a predetermined period from the start of restart. In the case of restarting with the manual transmission 42 in gear, in this embodiment, the throttle valve 52 is required to open as a restart condition (S23). Here, for the rider, there may be a situation where they want to start the vehicle 10 immediately, or a situation where they want to restart the engine 40 temporarily and wait to start. If the rider's intention is to restart the engine 40 temporarily, and the engine speed of 40 is increased simply in proportion to the amount of operation of the rider relative to the throttle lever 80, the engine 40 will accelerate to a high speed against the rider's intention, sometimes causing the rider to be startled by the noise, and causing discomfort to the rider.

[0072] Therefore, in this embodiment, if a throttle valve 52 closing operation is detected during a predetermined period from the start of restart, the engine speed of 40 is suppressed to idle speed and driven, thus temporarily reflecting the rider's intention to restart the engine 40. On the other hand, if no closing operation is detected, the engine speed of 40 is increased according to the operation amount (opening degree), thereby reflecting the rider's intention to start immediately. Thus, restart control of the engine 40 that conforms to the rider's intention is possible.

[0073] In S34, the detection result of the throttle operation sensor 110 is acquired. In S35, based on the detection result acquired in S34, it is determined whether a throttle valve closing operation of 52 has been detected. If a closing operation is detected, proceed to S33; otherwise, proceed to S36.

[0074] In S33, the engine 40 is driven at idle speed. In the case of restarting with the manual transmission 42 in gear, if a throttle valve 52 opening operation is detected and a restart of the engine 40 is initiated, followed by a closing operation (an operation that returns the throttle lever 80 to the side), then even if the throttle valve 52 is open at that moment, the driving idle speed of the engine 40 is limited by reducing the fuel supply, etc. This thus reflects the rider's intention to restart the engine 40. After S33, normal control of the engine 40 begins; if the throttle valve 52 is opened, the output of the engine 40 is increased proportionally to the amount of that operation.

[0075] In S36, based on the detection results obtained in S34, the engine 40 is driven at a speed corresponding to the opening amount (degree of opening) of the throttle valve 52. This reflects the rider's intention to start the vehicle 10 immediately. S37 determines whether a predetermined time (e.g., 3 seconds) has elapsed since the restart in S31. If not, it returns to S34 to monitor the closing operation of the throttle valve 52. If so, normal control of the engine 40 begins.

[0076] <Summary of Implementation Methods>

[0077] The above embodiments disclose at least the following straddle-type vehicles.

[0078] 1. The straddle-type vehicle (10) of the above embodiment includes:

[0079] Engine (40);

[0080] A manual transmission (42) is connected to the engine (40) via a clutch (43) to change the speed of the engine (40) and output the rotation.

[0081] Throttle valve operating element (80) which is capable of adjusting the throttle valve opening of the engine (40);

[0082] Clutch operating element (86) capable of operating the clutch (43) intermittently;

[0083] Throttle operation detection mechanism (110) detects the operation performed by the rider on the throttle operation component (80);

[0084] A clutch operation detection mechanism (111) detects the operation performed by the rider on the clutch operating member (86); and

[0085] The control mechanism (100) controls the automatic stop and restart of the engine (40) after automatic stop.

[0086] in,

[0087] When the manual transmission (42) is in gear, the control mechanism (100) restarts the engine (40) at least on the condition that the throttle operation detection mechanism (110) detects the opening operation of the throttle valve (52) and the clutch operation detection mechanism (111) detects the disengagement operation of the clutch (43).

[0088] During a predetermined period from the start of restart, if the throttle operation detection mechanism (110) detects a closing operation of the throttle valve (52), the control mechanism (100) drives the engine (40) at idle speed; if the throttle operation detection mechanism (110) does not detect a closing operation of the throttle valve (52), the control mechanism (100) drives the engine (40) at a speed corresponding to the operation amount detected by the throttle operation detection mechanism (110).

[0089] According to this embodiment, when the throttle valve is opened and then closed, it is presumed that the rider intends to temporarily restart the engine and drive it at idle speed. Conversely, when the throttle valve is not closed, it is presumed that the rider intends to start immediately and drive the engine at a speed corresponding to the amount of operation. Furthermore, by using the throttle valve opening operation as the restart trigger, even if the rider wants to start immediately, it is possible to achieve a start with the same throttle valve operation and clutch operation as during a normal engine-driven start, and to suppress engine stall. Thus, according to this embodiment, a motorcycle capable of engine restart control that conforms to the rider's intention can be provided.

[0090] 2. The straddle-type vehicle (10) of the above embodiment includes:

[0091] An electric motor (41) assists in starting the engine (40); and

[0092] The speed detection mechanism (113) detects the speed of the engine (40).

[0093] When the engine (40) is restarted,

[0094] If the speed detection result of the speed detection mechanism (113) is less than the predetermined speed, the control mechanism (100) drives the electric motor (41) and makes it assist in the restart of the engine (40).

[0095] If the detection result of the speed detection mechanism (113) is above the predetermined speed, the control mechanism (100) does not drive the motor (41).

[0096] According to this embodiment, the driving frequency of the electric motor can be reduced and the power load can be alleviated.

[0097] 3. The straddle-type vehicle (10) of the above embodiment includes:

[0098] Brake (83) that enables the straddle-type vehicle to brake;

[0099] Braking operating element (84), which is capable of operating the action of the brake;

[0100] Brake operation detection mechanism (112) that detects the rider's operation on the brake operating element; and

[0101] The slope detection agency (116) detects the slope of the road.

[0102] When the manual transmission (42) is in gear, if the slope detection mechanism (116) detects a slope of more than a predetermined value, the control mechanism (100) restarts the engine (40) on the condition that the throttle operation detection mechanism (110) detects the opening operation of the throttle (52), the clutch operation detection mechanism (111) detects the disengagement operation of the clutch (43), and the brake operation detection mechanism (112) detects the operation of the brake (83).

[0103] According to this implementation method, it is possible to suppress the vehicle from rolling backward when starting, and to more clearly infer the rider's starting intention.

[0104] 4. In the above-described embodiment of the straddle-type vehicle (10), when the engine (40) is restarted,

[0105] If the slope detection mechanism (116) detects a slope greater than the predetermined value, the control mechanism (100) drives the engine (40) at a higher speed than if a slope less than the predetermined value is detected.

[0106] According to this implementation method, it is possible to suppress engine stalling when starting a vehicle on an uphill road and to suppress vehicle rollback when starting a vehicle.

[0107] The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various modifications and alterations can be made within the scope of the spirit of the present invention.

Claims

1. A straddle-type vehicle (10) comprising: Engine (40); A manual transmission (42) is connected to the engine (40) via a clutch (43) to change the speed of the engine (40) and output the rotation. Throttle valve operating element (80) which is capable of adjusting the throttle valve opening of the engine (40); Clutch operating element (86) capable of operating the clutch (43) intermittently; Throttle operation detection mechanism (110) detects the operation performed by the rider on the throttle operation component (80); A clutch operation detection mechanism (111) detects the operation performed by the rider on the clutch operating member (86); and The control mechanism (100) controls the automatic stop and restart of the engine (40) after automatic stop. Its features are, When the manual transmission (42) is in gear, the control mechanism (100) restarts the engine (40) at least on the condition that the throttle operation detection mechanism (110) detects the opening operation of the throttle valve (52) and the clutch operation detection mechanism (111) detects the disengagement operation of the clutch (43). During a predetermined period from the start of restart, if the throttle operation detection mechanism (110) detects a closing operation of the throttle valve (52), the control mechanism (100) drives the engine (40) at idle speed; if the throttle operation detection mechanism (110) does not detect a closing operation of the throttle valve (52), the control mechanism (100) drives the engine (40) at a speed corresponding to the operation amount detected by the throttle operation detection mechanism (110).

2. The straddle-type vehicle (10) according to claim 1, characterized in that, The motorcycle (10) has the following features: An electric motor (41) assists in starting the engine (40); and The speed detection mechanism (113) detects the speed of the engine (40). When the engine (40) is restarted, If the speed detection result of the speed detection mechanism (113) is less than the predetermined speed, the control mechanism (100) drives the electric motor (41) and makes it assist in the restart of the engine (40). If the detection result of the speed detection mechanism (113) is above the predetermined speed, the control mechanism (100) does not drive the motor (41).

3. The straddle-type vehicle (10) according to claim 1, characterized in that, The motorcycle (10) has the following features: Brake (83) that enables the straddle-type vehicle to brake; Braking operating element (84), which is capable of operating the action of the brake; Brake operation detection mechanism (112) that detects the rider's operation on the brake operating element; and The slope detection agency (116) detects the slope of the road. When the manual transmission (42) is in gear, if the slope detection mechanism (116) detects a slope of more than a predetermined value, the control mechanism (100) restarts the engine (40) on the condition that the throttle operation detection mechanism (110) detects the opening operation of the throttle (52), the clutch operation detection mechanism (111) detects the disengagement operation of the clutch (43), and the brake operation detection mechanism (112) detects the operation of the brake (83).

4. The straddle-type vehicle (10) according to claim 3, characterized in that, In the case of restarting the engine (40), If the slope detection mechanism (116) detects a slope greater than the predetermined value, the control mechanism (100) drives the engine (40) at a higher speed than if a slope less than the predetermined value is detected.

Images