TWI814159B - MT type straddle vehicle - Google Patents

Abstract

The present invention provides an MT-type straddle-type vehicle that performs idle shutdown and further improves the convenience of starting from the idle shutdown state. The MT-type straddle-type vehicle of the present invention assists in starting the vehicle when the vehicle does not start after the engine is started through the following series of processes: (A) stopping the engine by satisfying the idle stall condition; ( B) When the engine is stopped due to process (A), start the engine based on the driver's operation of the clutch lever and the manual clutch is switched to the cut-off state; and (C) At least after starting the engine according to process (B), When the manual transmission is in a non-neutral state, the driver operates the clutch lever to start the vehicle and the manual clutch is switched to the connected state, causing the engine to stall. The operation of the lever causes the manual clutch to switch to the cut-off state as an opportunity to restart the engine.

Description

MT type straddle vehicle

The invention relates to an MT (manual transmission, manual transmission) type straddle-type vehicle.

Among the MT (manual transmission) type straddle-type vehicles that implement idling stop, there is a vehicle that can restart the engine through simple operation when the engine stops because the idling stop condition is met. For example, in the MT type straddle-type vehicle in Patent Document 1, when the engine is stopped due to idling stall, a flag indicating the idling stall status is recorded, and when the conditions for restarting the engine are met and the clutch lever is operated to cut off the manual clutch , restart the engine by starting the motor. When the engine is restarted, the flag indicating the idle stall status is cleared. When the MT-type straddle-type vehicle in Patent Document 1 is in an idling stall state, the engine can be started by operating the clutch lever. [Prior technical literature] [Patent Document]

Patent document 1: Japanese Patent Application Publication No. 2016-156346

[Problem to be solved by the invention]

In an MT-type straddle-type vehicle that performs idle-stop operation, it is desired to further improve the convenience of starting from the idle-stop state. An object of the present invention is to provide an MT-type straddle-type vehicle that performs idle shutdown and further improves the convenience of starting from the idle shutdown state. [Technical means to solve problems]

The present inventors studied the operation when starting from an idle-stop state in an MT-type straddle-type vehicle that performs idle-stop. In this study, the present inventor focused on the following, namely, the use of hands and feet when starting an MT-type straddle-type vehicle that performs idle stop and the operation when starting an MT-type four-wheel vehicle that performs idle stop. The hands and feet are used differently. The inventor therefore noticed that during the operation of the MT straddle-type vehicle, the engine may stall depending on the operating time.

For example, in an MT four-wheel vehicle, the manual clutch is activated by the driver operating the clutch pedal with his left foot. The driver disengages the manual clutch by depressing the clutch pedal with his left foot, and the driver engages the manual clutch by releasing the clutch pedal with his left foot. The accelerator is activated by the driver operating the accelerator pedal with his right foot. The driver increases the engine speed by depressing the accelerator pedal with his right foot. The brakes are activated by the driver operating the brake pedal with his right foot. The driver applies the brakes by depressing the brake pedal with his right foot. Therefore, in an MT four-wheel vehicle, it is not easy to operate the accelerator and the brake at the same time, so ordinary drivers usually do not operate the accelerator and the brake at the same time.

In an MT-type four-wheel vehicle that implements idling stop, consider a configuration in which the driver starts the engine by depressing the clutch pedal after the engine stops due to idling stop. In this type of MT four-wheel vehicle, the starting operation is considered to be performed as follows. After the engine stops due to idling stall, the engine is started by the driver depressing the clutch pedal. Secondly, the driver shifts his right foot from the brake pedal to the accelerator pedal to increase the engine rotation speed. During this period, the driver's left foot was pressing the clutch pedal. Secondly, while depressing the accelerator pedal, the driver operates his left foot in the direction of releasing the clutch pedal, resulting in a half-clutch state. Therefore, a time lag occurs between the engine starting in response to the driver depressing the clutch pedal and the driver operating his foot in the direction of releasing the clutch pedal. During this period, the rotation speed of the started engine will increase.

In contrast, in an MT-type straddle-type vehicle, the manual clutch is operated by the driver operating the clutch lever with his left hand. The driver disengages the manual clutch by holding the clutch lever with his left hand, and engages the manual clutch by releasing the clutch lever with his left hand. The accelerator is activated by the driver operating the handle with his right hand. The driver increases the engine speed by rotating the accelerator grip. The brakes are activated, for example, by the driver operating the rear wheel brake pedal with his right foot. The driver applies the rear brake by depressing the rear brake pedal with his right foot. Therefore, in an MT type straddle-type vehicle, the driver operates the accelerator grip with his right hand and operates the rear wheel brake pedal with his right foot, so that the driver can operate both the accelerator and the brake at the same time.

For example, in the case of the MT-type straddle-type vehicle of Patent Document 1, the starting operation sequence is as follows. After the engine stops due to idling stall, the driver starts the engine by holding the clutch lever. At this time, the driver uses his right hand to operate the accelerator grip and increase the engine rotation speed. At the same time, the driver uses his left hand to operate in the direction of releasing the clutch lever to connect the manual clutch. Then, the driver operates the rear wheel brake pedal with his right foot. The driver of the MT-type straddle-type vehicle can start operating the accelerator grip, the clutch lever, and the brake pedal at the same time. Therefore, in the MT-type straddle-type vehicle, the time lag from when the engine is started to when the driver operates the accelerator to engage the clutch can be reduced. The driver can connect the manual clutch in a short time after starting the engine. Therefore, the manual clutch may be connected after the engine is started and before the rotational speed has sufficiently increased. As a result, the engine sometimes stalls.

Furthermore, the straddle-type vehicle is configured such that the posture of the vehicle is controlled by the movement of the driver's weight while traveling. Therefore, from the viewpoint of operability and driving performance, straddle-type vehicles tend to be compact. Among straddle-type vehicles, the vehicle is relatively small, and the size of the engine accounts for a larger proportion of the entire vehicle. Engines in straddle-type vehicles also tend to be smaller. Therefore, the output torque and crankshaft inertia of the engine of the straddle-type vehicle tend to be smaller than those of the automobile, for example. Therefore, in MT-type straddle-type vehicles, the engine may stall due to the operation of the clutch lever when starting the vehicle.

For example, when starting an engine in an MT-type straddle-type vehicle having a starter motor provided independently of a generator, the starter motor drives the crankshaft via a one-way clutch and a reduction gear. Therefore, in this type of MT straddle-type vehicle, when the engine is started, the operating sounds of the starter motor, one-way clutch, reduction gear, etc. will be generated. In contrast, in an MT-type straddle-type vehicle having a crankshaft-linked starter generator connected to the crankshaft so as to transmit power thereto without a clutch, the crankshaft-linked starter-generator is connected to the crankshaft without a clutch. Transmits power to the crankshaft. Therefore, the operating sound at the time of starting in an MT-type straddle-type vehicle having a crankshaft-linked starter generator is, for example, smaller than in an MT-type straddle-type vehicle having a starter motor independent of the generator. Therefore, it is sometimes difficult for drivers to recognize the starting status of the engine of an MT-type straddle-type vehicle with a crankshaft-linked starter-generator. In this case, the driver may connect the manual clutch immediately after the engine starting action begins without confirming the completion of the engine starting action. Therefore, in an MT-type straddle-type vehicle equipped with a crankshaft-linked starter-generator, the engine may stall due to the operation of the clutch lever.

In this way, in an MT type straddle-type vehicle, the driver's hands and feet assigned during operation are different from those of an MT type four-wheeled vehicle. Furthermore, the posture control of the vehicle is different from that of an MT-type four-wheeled vehicle. Furthermore, there is a crankshaft Linked starter generator. Therefore, in the MT type straddle type vehicle, the engine may stall due to the operation at the time of starting. The inventors of the present invention conducted further research on engine stalling when starting an MT-type straddle-type vehicle that performs idle shutdown. In this study, the inventor considered starting the engine in a situation where the engine stalls when the driver performs a starting operation after the engine has been stopped due to idling stall. Specifically, the control device of the MT straddle-type vehicle is configured to assist in starting the vehicle when the vehicle does not start after the engine is started, through a series of processes (A) to (C) below. Processing (A) ~ (C) series: (A) Processing, stopping the engine by satisfying idle stall conditions; (B) Processing, when the engine is stopped due to process (A), starting the engine by using the crankshaft-linked starter generator based on the driver's operation of the clutch lever and the manual clutch switching to the cut-off state; and (C) Process, at least after starting the engine according to process (B), when the manual clutch is switched to the connected state due to the driver's operation of the clutch lever to start the vehicle while the manual transmission is in a non-neutral state. When the engine stalls, the manual clutch is switched to the cut-off state based on the driver's operation of the clutch lever in the non-neutral state, and the engine is restarted by the crankshaft-linked starter generator.

As mentioned above, in the MT-type straddle-type vehicle that performs idling stop, because the hands and feet allocated during operation are different from the MT-type four-wheel vehicle, after the engine is started, the engine may sometimes start due to the operation. Stall. However, after the engine is stopped due to idling stall, even if the engine stalls due to the operation at start, the engine can be restarted by a simple operation of holding the clutch lever. Furthermore, when the engine stalls due to the operation of releasing the clutch lever, the manual transmission of the MT-type straddle-type vehicle is in a non-neutral state. Therefore, the engine can be restarted in a non-neutral state by simply holding the clutch lever that is the target of the release operation again and returning to the previous state. Since the manual transmission can restart the engine in a non-neutral state, the driver only needs to release the clutch lever again from the temporarily stalled state of the started engine, and the vehicle can be started without performing a gear change. In addition, since the engine is restarted by the crankshaft-linked starter generator, the sound when the engine is restarted is small. Therefore, the MT-type straddle-type vehicle of the present invention can restart the engine quietly, quickly and simply when the engine stalls due to the driver's operation of the clutch lever after the engine is stopped due to idling stall. Thereby, in an MT-type straddle-type vehicle that executes idling stop, the convenience of operation for starting from the idling stop state can be further improved.

In order to achieve the above object, according to one aspect of the present invention, an MT-type straddle-type vehicle has the following configuration. (1) An MT type straddle-type vehicle, The above-mentioned MT straddle-type vehicle has: An engine having a crankshaft and outputting power generated by combustion via the rotating crankshaft; Driving wheels, which receive the power output from the above-mentioned engine and drive the above-mentioned MT type straddle-type vehicle; A manual transmission that changes the transmission ratio between the above-mentioned engine and the above-mentioned driving wheels to multiple stages including neutral state and non-neutral state according to the driver's operation; A clutch lever, which accepts the clutch operation of the above-mentioned driver; A manual clutch is provided on the power transmission path between the engine and the manual transmission, and interrupts the power transmission between the engine and the manual transmission according to the driver's operation of the clutch lever; A crankshaft-linked starter generator is connected to the crankshaft without a clutch in a manner that is linked to the crankshaft, starts the engine by driving the crankshaft when the engine is started, and is driven by the crankshaft during the combustion operation of the engine. and generate electricity; and The control device is configured to provide assistance for starting the vehicle when the vehicle does not start after the engine is started, through a series of processes (A) to (C) below, where the processes (A) to (C) are: (A) processing, stopping the above-mentioned engine by satisfying the idle stall condition; (B) When the engine is stopped due to the process (A), the manual clutch is switched to the cut-off state in response to the driver's operation of the clutch lever, and the crankshaft-linked starter generator is started. to start the above engines; and (C) processing, at least after starting the above-mentioned engine according to the above-mentioned processing (B), when the above-mentioned manual transmission is in the above-mentioned non-neutral state to start the vehicle based on the above-mentioned driver's operation of the above-mentioned clutch lever. When the manual clutch is switched to the connected state and the engine stalls, the engine is started by the crankshaft linkage type based on the driver's operation of the clutch lever in the non-neutral state and the manual clutch is switched to the cut-off state. The motor rotates the crankshaft without passing through the clutch, thereby restarting the engine.

(1) The MT-type straddle-type vehicle is equipped with an engine, drive wheels, manual transmission, clutch lever, manual clutch, crankshaft-linked starter generator, and control device. The engine has a crankshaft. The engine outputs power generated by combustion through a rotating crankshaft. The driving wheels receive the power output from the engine and drive the MT-type straddle-type vehicle. A manual transmission changes the gear ratio between the engine and the drive wheels into multiple stages including neutral and non-neutral states based on the driver's operation. The clutch lever accepts the driver's clutch operation. The clutch lever is operated by the driver's hands. The manual clutch is provided in the power transmission path between the engine and the manual transmission. The manual clutch interrupts the power transmission between the engine and the manual transmission according to the driver's operation of the clutch lever. A crankshaft-linked starter-generator is connected to the crankshaft in a manner that is linked to the crankshaft without a clutch. By transmitting power between the crankshaft-linked starter generator and the crankshaft without passing through a clutch, the crankshaft-linked starter-generator and the crankshaft are linked. The crankshaft-linked starter generator drives the crankshaft when the engine is started, thereby starting the engine, and is driven by the crankshaft to generate electricity during the engine's combustion operation.

The control device is configured to provide assistance for starting the vehicle when the vehicle does not start after the engine is started, through a series of processes (A) to (C) below. Process (A) is a process of stopping the engine by satisfying the idle stall condition. Process (B) is a process in which, when the engine is stopped due to process (A), the manual clutch is switched to the cut-off state in response to the driver's operation of the clutch lever, and the crankshaft-linked starter generator is used to start the engine. Process (C) is a process in which, at least after starting the engine according to process (B), the manual clutch is switched to the connected state due to the operation of the clutch lever to start the vehicle in a non-neutral state, causing the engine to stall. , and then start the engine. More specifically, in process (C), after starting the engine according to process (B), the control device switches the manual clutch according to the driver's operation of the clutch lever at least because the manual transmission is in a non-neutral state. When the engine stalls due to the connected state, the crankshaft-linked starter generator is used to restart the engine. In this case, the control device takes the opportunity of the manual clutch switching to the cut-off state according to the driver's operation of the clutch lever in the non-neutral state, and uses the crankshaft-linked starter generator to rotate the crankshaft without using the clutch. , thereby restarting the engine.

The MT-type straddle-type vehicle starts the engine and starts the vehicle by operating hands and feet that are different from, for example, a four-wheeled vehicle. The manual clutch of the MT-type straddle-type vehicle operates according to the operation of the clutch lever by the driver's hand. After the engine starting action begins, the manual clutch may be connected within a short period of time. In addition, the MT-type straddle-type vehicle pursues compactness and lightweight in terms of control of the posture of the vehicle, which is different from, for example, a four-wheel vehicle, and the inertia of the crankshaft of the engine is small. Furthermore, the MT-type straddle-type vehicle equipped with a starter generator makes less operating noise when starting, compared with, for example, an MT-type straddle-type vehicle provided with a starter motor independent of the generator. Therefore, the driver sometimes connects the manual clutch without confirming the completion of the engine starting action. Therefore, in an MT-type straddle-type vehicle with a crankshaft-linked starter-generator, the starting engine may sometimes stall due to the operation of the clutch lever during starting. When the engine stalls due to the connecting operation of the manual clutch used to start the MT-type straddle-type vehicle, the manual transmission is in a non-neutral state. Here, in (1) the MT-type straddle-type vehicle, after the engine stalls due to the driver's starting operation after idling, the manual clutch can be turned on by holding the clutch lever in the non-neutral state. Off state operation to start the engine. That is, if the MT-type straddle-type vehicle in (1) starts the engine after stopping due to idling stall, and the engine stalls due to the operation of the clutch lever for starting, it only needs to be reset by the operation of the clutch lever. The engine can be started again without shifting gears. The engine is restarted by the action of the crankshaft-linked starter generator, whereby a stalled engine can be restarted with relatively little noise. Therefore, the MT type straddle-type vehicle of (1) can restart the engine quietly, quickly and simply when the engine stalls due to the operation of the clutch lever for starting after the engine is stopped due to idling stall. Start. Thereby, according to the structure of (1), in the MT type straddle-type vehicle that performs idling stop, the convenience of the operation for starting from the idling stop state can be further improved.

According to one aspect of the present invention, the MT-type straddle-type vehicle can adopt the following configuration. (2) MT-type straddle-type vehicle as in (1), in which The above-mentioned idle stall condition includes that the above-mentioned manual transmission is in neutral state.

In the MT-type straddle-type vehicle of (2), when the manual transmission is in neutral, the engine stops due to idling stall. During the period from the idle stop state to the start of the vehicle, the neutral state of the transmission changes to the non-neutral state according to the operation. In this way, even in a situation where the number of operations from the idle shutdown state to the start increases, the operation for restarting the engine when the engine stalls can be simplified. Therefore, the convenience of the operation for starting from the idle shutdown state can be improved.

According to one aspect of the present invention, the MT-type straddle-type vehicle can adopt the following configuration. (3) An MT-type straddle-type vehicle such as (1) or (2), in which In the above process (B), when the above engine is stopped due to the above process (A), after the above manual transmission is switched from the neutral state to the above non-neutral state, the above manual clutch is switched to the neutral state according to the above driver's operation. Taking the interruption state as an opportunity to start the above engine.

In the MT-type straddle-type vehicle of (3), after the engine is stopped in the neutral state of the manual transmission, and the manual transmission is switched to the non-neutral state, the manual clutch is switched corresponding to the driver's operation. Taking the cut-off state as an opportunity, start the engine. When the state of the manual transmission changes to a non-neutral state when the engine is stopped, there is a high possibility that an operation for starting the engine will be performed thereafter. In the MT-type straddle-type vehicle of (3), the engine can be started in a state where the possibility of performing an operation for starting the engine is high. In addition, it is in a non-neutral state when the engine is started, so that the operation of setting it to a non-neutral state after the engine is started can be omitted. Therefore, in an MT-type straddle-type vehicle that executes idling stop, the convenience of operation for starting the engine from the idling stop state can be further improved.

According to one aspect of the present invention, the MT-type straddle-type vehicle can adopt the following configuration. (4) MT-type straddle-type vehicle as in (1), in which The above-mentioned idle stall condition includes the above-mentioned manual transmission being in the above-mentioned non-neutral state.

In the MT-type straddle-type vehicle of (4), the manual transmission is in a non-neutral state, which becomes one of the idle stall conditions. Thereby, the MT-type straddle-type vehicle of (4) can maintain the non-neutral state from the stop of the engine due to idling stall to the start and start of the engine. Therefore, for example, the above-mentioned period and speed change operation can be omitted. Thereby, the MT-type straddle-type vehicle of (4) can further improve the convenience of operation for starting from the idle stall state.

According to one aspect of the present invention, the MT-type straddle-type vehicle can adopt the following configuration. (5) An MT-type straddle-type vehicle as in any one of (1) to (4), in which In the above-mentioned process (B), when the above-mentioned manual transmission is in the above-mentioned non-neutral state and the above-mentioned engine is stopped due to the above-mentioned process (A), the above-mentioned manual clutch is switched to the cut-off state according to the above-mentioned driver's operation. opportunity to start the above engine.

In the MT-type straddle-type vehicle of (5), when the manual transmission is in a non-neutral state and the engine is stopped due to processing (A), the manual clutch is converted to The cut-off state is an opportunity to start the engine. For MT-type straddle-type vehicles according to (5), after the engine is stopped due to idling stall, the engine can be restarted without shifting the manual transmission to neutral. Thereby, the MT-type straddle-type vehicle of (5) can further improve the convenience of operation for starting from the idle stall state.

According to one aspect of the present invention, the MT-type straddle-type vehicle can adopt the following configuration. (6) An MT-type straddle-type vehicle as in any one of (1) to (5), in which The control device uses the switching of the manual clutch to the cut-off state as an opportunity to limit the number of restarts of the engine to less than the upper limit number of restarts.

Since the MT type straddle-type vehicle pursues compactness and lightweight, the battery used as the power source of the crankshaft-linked starter generator also pursues compactness. In the MT-type straddle-type vehicle of (6), the number of engine restarts is limited to the maximum number of restarts when the manual clutch is switched to the cut-off state. Thereby, the MT type straddle-type vehicle of (6) can suppress the power consumption caused by restarting the engine, and therefore can use a small battery. Furthermore, in the MT-type straddle-type vehicle of (6), since the number of engine restarts is limited, the wear of the manual clutch can be suppressed. That is, in the MT-type straddle-type vehicle of (6), in the MT-type straddle-type vehicle that performs idling shutdown, a small battery is used to suppress the wear of the manual clutch and further improve the starting ability from the idle shutdown state. the ease of operation.

According to one aspect of the present invention, the MT-type straddle-type vehicle can adopt the following configuration. (7) An MT-type straddle-type vehicle as in any one of (1) to (6), in which The above-mentioned control device stops the above-mentioned engine by satisfying the above-mentioned idle shutdown condition. During the period from when the above-mentioned engine is stopped because the above-mentioned idle shutdown condition is satisfied until the above-mentioned manual clutch is switched to the cut-off state as an opportunity to start the above-mentioned engine, regardless of the above-mentioned The above-mentioned engine will not be started when the manual transmission is in the neutral state or in any of the above-mentioned non-neutral states.

In the MT-type straddle-type vehicle of (7), the control device stops the engine by satisfying the idle stall condition, and does not start the engine until the manual clutch is switched to the cut-off state as an opportunity to start the engine. (7) For MT-type straddle-type vehicles, under the above conditions, the engine will not be started regardless of whether the manual transmission is in neutral or non-neutral. Thereby, the MT-type straddle-type vehicle of (7) can suppress the behavior change of the vehicle body during idling shutdown.

The technical terms used in this specification are for the purpose of defining specific embodiments only and are not intended to limit the invention. The term "and/or" used in this specification includes one or more of all the components or all combinations of the related listed items. When used in this specification, the terms "including, having," "comprising," or "having" and their variations are used to specify the described features, processes, operations, elements, Components and/or their equivalents exist, but may include one or a plurality of steps, actions, elements, components, and/or groups thereof. When used in this specification, the terms "installation", "connection", "combination" and/or their equivalents are widely used, including both direct and indirect installation, connection and combination. Furthermore, "connection" and "bonding" are not limited to physical or mechanical connections or combinations, but may include direct or indirect electrical connections or combinations. Unless otherwise defined, all terms (including technical terms and scientific terms) used in this specification have the same meanings as commonly understood by those to whom the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted to have meanings consistent with the meaning in the context of the relevant technology and the present invention. Unless explicitly defined in this specification, they are not intended to be ideal or Explanation of excessive formal meaning. It is understood that numerous techniques and processes are disclosed in the description of the present invention. Each of these has individual benefits, and each may also be used with more than one other disclosed technology, or all of them as appropriate. Therefore, for the sake of clarity, this description avoids unnecessary repetition of all possible combinations of individual steps. On the contrary, when reading the specification and the scope of the patent application, it should be understood that such combinations are all within the scope of the invention and claims.

In this manual, the new MT type straddle-type vehicle is explained. In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a complete understanding of the invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. The present invention is to be considered as illustrative of the invention and is not intended to limit the invention to the specific embodiments represented by the following drawings or descriptions.

MT type straddle-type vehicle is a straddle-type vehicle with a manual transmission. A straddle vehicle refers to a vehicle in which the driver sits astride the saddle. Examples of straddle-type vehicles include light motorcycles with pedals, off-road motorcycles, and road motorcycles. In addition, the MT-type straddle-type vehicle is not limited to a motorcycle, and may also be a three-wheeled motorcycle, ATV (All-Terrain Vehicle, all-terrain vehicle), etc., for example. A three-wheeled motorcycle can have 2 front wheels and 1 rear wheel, or it can have 1 front wheel and 2 rear wheels. The driving wheels of MT-type straddle-type vehicles can be rear wheels or front wheels. In addition, the driving wheels of the straddle-type vehicle may be both rear wheels and front wheels. Moreover, it is preferable that the MT-type straddle-type vehicle is configured to be capable of turning in a tilted posture. The MT-type straddle-type vehicle configured to be capable of turning in a tilted posture is configured to turn in a tilted posture toward the center of a curve. Thereby, the MT-type straddle-type vehicle configured to be able to rotate in a tilted posture resists the centrifugal force applied to the vehicle when it rotates. In the MT-type straddle-type vehicle configured to be able to rotate in a tilted posture, in order to pursue lightness, the responsiveness of the movement to the starting operation is emphasized. In the MT-type straddle-type vehicle, for example, there is no torque converter that utilizes the dynamic action of fluids in the power transmission path from the engine to the driving wheels. In an MT-type straddle-type vehicle, for example, a centrifugal clutch is not provided in the power transmission path from the engine to the drive wheels.

An engine has, for example, a high load area and a low load area. The engine is, for example, a four-stroke engine. Four-stroke engines have high load areas and low load areas between the four strokes. A four-stroke engine having a high load area and a low load area is, for example, a single cylinder engine. A four-stroke engine with a high load area and a low load area is, for example, a two-cylinder engine, a non-equally spaced combustion three-cylinder engine, or a non-equally spaced combustion four-cylinder engine. In four-stroke engines with high load areas and low load areas, the variation in rotation at lower rotational speeds is greater than in other types of engines. The high load area refers to the area where the load torque in one combustion cycle of the engine is higher than the average load torque in one combustion cycle. The low load area refers to the area other than the high load area in a combustion cycle. When viewed based on the rotation angle of the crankshaft, the low load area in the engine is, for example, larger than the high load area. The compression stroke coincides with the high load area. The engine is not particularly limited. For example, it may be an engine that does not have a high load area or a low load area.

Idle stall is a function that stops the engine by meeting the specified idle stall. The idle stall condition is one or more combinations of certain operations performed by the driver when stopping the MT straddle-type vehicle or when it is scheduled to stop, and the state of the MT-type straddle-type vehicle caused by these operations. Set conditions other than turning the main switch (engine button) off as the specified idle stall condition.

The crankshaft-linked starter generator functions as a starter motor that starts the engine. In addition, a crankshaft-linked starter generator is a starter generator that is driven by an engine and generates electricity. The crankshaft-linked starter generator is, for example, a permanent magnet starter generator. The crankshaft-linked starter-generator may be, for example, a starter-generator that does not use permanent magnets. The permanent magnet crankshaft-linked starter-generator is, for example, a brushless motor. Brushless motors are motors that do not have a commutator. A crankshaft-linked starter-generator is always linked to a crankshaft, for example. Specifically, the crankshaft-linked starter-generator is directly connected to the crankshaft without passing through a clutch such as a one-way clutch. However, the crankshaft-linked starter-generator may also be connected to the crankshaft via a gear or a belt.

The manual clutch is configured to operate in response to the driver's operation of the clutch lever. The manual clutch is a clutch that operates by changing the state of connection or disconnection when starting the vehicle and changing the transmission range. As a manual clutch, a wet or dry multi-plate or single-plate clutch can be exemplified. A centrifugal clutch that does not operate according to operation does not comply with the manual clutch of the present invention. The operation of the clutch lever used to switch the manual clutch to the connected state is the operation of releasing the clutch lever by hand. The operation in the direction of releasing the clutch lever is included in the operation of releasing the clutch lever.

The power transmission path is a general term for the mechanical elements in the path that transmits the engine's power from the engine's crankshaft to the driving wheels. The power transmission path includes at least any one of a driving shaft, a driven shaft, a driving gear, a driven gear, a chain sprocket, a chain, and a driving belt. For example, the power transmission path transmits power from the engine to the drive wheels without intervening a centrifugal clutch. Engine stalling is likely to occur in MT-type straddle-type vehicles that do not have a centrifugal clutch.

A manual transmission changes the transmission ratio through the driver's operation. The manual transmission changes the transmission ratio in multiple stages according to the operation of the transmission pedal. A manual transmission has a plurality of gear segments including neutral states. That is, the manual transmission can change the gear ratio in multiple stages including the neutral state. A manual transmission has, for example, a neutral state and a non-neutral state. The non-neutral state can include more than 3 stages. The neutral state is a state in which power is not transmitted from the input shaft to the output shaft. When the manual transmission is not in the neutral state, the rotational power input from the input shaft is changed by the transmission ratio corresponding to the operation of the transmission pedal and transmitted to the output shaft. Continuous transmissions are not compatible with manual transmissions.

The control device controls the combustion action of the engine. Furthermore, the control device controls the driving and power generation actions of the starter generator. For example, the control device may be formed in a position where a plurality of devices are separated from each other, or may be formed integrally. The control device may have a processor that executes the program, and may also be an electronic circuit.

Regarding the series of processes (A) to (C) of the control device, the following can be said. The series of processes (A) to (C) is configured to assist in starting the vehicle when the vehicle has not started after starting the engine. The non-neutral state of the manual transmission in process (C) can start after the engine starts in process (B), or it can also start before the engine starts. Furthermore, the situation in which the manual transmission is in a non-neutral state in process (C) may also start before the engine is stopped in process (A). The process (C) in the control device is, for example, after starting the engine according to the process (B), that is, starting the engine after stopping the engine due to idling stall, and then restarting the engine when the engine stalls because the manual clutch is switched to the connected state. processing. However, the control device is not particularly limited. For example, if the engine stalls due to the manual clutch being switched to the connected state after starting the engine without following the process (B), the process of restarting the engine may also be executed. In addition, after starting the engine according to process (B), when the manual clutch is switched to the connected state and the engine stalls, the control device can also switch the manual clutch to the cut-off state based on the driver's operation of the clutch lever as an opportunity to restart the engine. The situation of startup and the situation of non-implementation of restart. When the above-mentioned restart is not performed, the control device can restart the engine through the crankshaft-linked starter generator based on the operation of the starter switch provided in the MT-type straddle-type vehicle, for example. In addition, the situation in process (B) in which the engine stalls due to the manual clutch being switched to the connected state after the engine is started is a situation in which the engine is operating due to the above-mentioned engine start and has not yet been driven after starting. In addition, "starting the engine" in "after starting the above-mentioned engine according to the above-mentioned process (B)" may also be "complete starting of the engine". In addition, "assistance for starting the vehicle when the vehicle does not start after the engine is started" is different from assistance for starting the engine when the engine cannot be started.

The upper limit number of restarts is, for example, a predetermined value. The upper limit of restart times is not particularly limited, and may vary depending on the charging state of the battery, for example. [Effects of the invention]

According to the present invention, it is possible to provide an MT-type straddle-type vehicle that performs idle shutdown and further improves the convenience of starting from the idle shutdown state.

Hereinafter, the present invention will be described with reference to the drawings.

[First Embodiment] FIG. 1 is a diagram comparing the structure of the MT type straddle-type vehicle 1 according to the first embodiment of the present invention with a comparative example. FIG. 1(a) schematically shows a left side view of the MT type straddle-type vehicle 1 . FIG. 1(b) is a right side view schematically showing a part of the MT-type straddle-type vehicle 1 . FIG. 1(c) is a flowchart showing the operation of the control device of the MT-type straddle-type vehicle 1. FIG. 1(d) is a left side view showing the structure of an MT type four-wheel vehicle 100 as a comparative example. FIG. 1(e) is an enlarged view of the pedal portion of the MT type four-wheel vehicle 100.

As shown in FIG. 1( a ), the MT type straddle-type vehicle 1 includes an engine 10 , drive wheels 21 , a manual transmission 30 , a clutch lever 36 , a manual clutch 35 , and a starter generator 40 . Engine 10 has a crankshaft 15 . The engine 10 will output the power generated by combustion through the rotating crankshaft 15 . The driving wheels 21 receive the power output from the engine 10 and drive the MT-type straddle-type vehicle 1 . The manual transmission 30 changes the speed ratio between the engine 10 and the driving wheels 21 to multiple stages including a neutral state and a non-neutral state according to the operation of the driver of the MT type straddle-type vehicle 1 . The clutch lever 36 receives the clutch operation of the manual clutch 35 of the driver of the MT type straddle type vehicle 1 . The clutch lever 36 is operated by the driver's hand of the MT type straddle type vehicle 1 . The manual clutch 35 is provided in the power transmission path 31 between the engine 10 and the manual transmission 30 . The manual clutch 35 interrupts the power transmission between the engine 10 and the manual transmission 30 according to the driver's operation of the clutch lever 36 . The power transmission path 31 transmits power from the engine 10 to the driving wheels 21 without interposing a centrifugal clutch. The starter generator 40 is a crankshaft-linked starter generator that is linked to the crankshaft 15 . The starter generator 40 is connected to the crankshaft 15 so as to transmit power thereto without passing through a clutch. The starter generator 40 starts the engine 10 by driving the crankshaft 15 when the engine 10 is started, and is driven by the crankshaft 15 to generate electricity during the combustion operation of the engine 10 . Moreover, as shown in FIG. 1(b) , the MT-type straddle-type vehicle 1 is provided with an accelerator grip 16 . The accelerator grip 16 accepts the accelerator operation performed by the driver. Moreover, as shown in the dotted line part of FIG. 1(a), the MT type straddle type vehicle 1 is equipped with the brake pedal 22. The brake pedal 22 receives the braking operation and causes the driving wheel 21 to brake.

Furthermore, the MT-type straddle-type vehicle 1 is provided with a control device 51 . The control device 51 receives signals from the engine 10 , the gear position sensor 301 of the manual transmission 30 , the clutch lever position sensor 361 of the clutch lever 36 , and the starter generator 40 . The control device 51 controls the combustion operation of the engine 10 based on the received signal, and also controls the operation of the starter generator 40 via the driver 45 . The control device 51 is configured to provide assistance for starting the vehicle when the vehicle has not started after the engine 10 is started, through a series of processes (A) to (C) below. Processes (A) to (C) are shown in steps S101 to S107 in Fig. 1(c).

Process (A) is a process of stopping the engine 10 by satisfying the idle shutdown condition. When the control device 51 determines that the idle stall condition is met in step S101, the combustion operation of the engine 10 is stopped in step S102.

In process (B), when the engine 10 is stopped due to process (A), the engine 10 is started by starting the generator 40 based on the driver's operation of the clutch lever 36 and switching the manual clutch 35 to the disconnected state. When the control device 51 receives a signal indicating that the manual clutch 35 is switched to the disconnected state from the clutch lever position sensor 361 in step S103, it causes the starter generator 40 to start the engine 10 via the driver 45 in step S104.

Process (C) is the process of starting the engine 10 by starting the generator 40 when the engine 10 stalls due to the manual clutch 35 being switched to the connected state to start the vehicle in the non-neutral state after starting the engine 10 according to the process (B). Engine 10 starts again. More specifically, after starting the engine 10 according to the process (B), when the manual transmission 30 is in the non-neutral state and the manual clutch 35 is switched to the connected state and the engine 10 stalls, by Starting the generator 40 causes the engine 10 to restart. In this case, the control device 51 takes the opportunity that the manual clutch 35 is switched to the disconnected state according to the driver's operation of the clutch lever 36 in the non-neutral state to restart the engine 10 by starting the generator 40 . After the engine 10 is started according to the process (B), if an engine stall caused by the vehicle starting operation is detected, the engine 10 can be restarted through the same operation as the operation in the process (B).

In step S105, the control device 51 detects the stall of the engine 10 caused by the driver's operation of the clutch lever 36 when the manual transmission 30 is in the non-neutral state and the manual clutch 35 is switched to the connected state. In step S105, the control device 51 determines that the engine 10 is stalled, for example, when the following conditions (i) to (iii) are satisfied. Here, the conditions (i) to (iii) are as follows. (i) The control device 51 receives a signal from the gear position sensor 301 indicating that the manual transmission 30 is in a non-neutral state. (ii) The control device 51 receives a signal from the clutch lever position sensor 361 indicating that the manual clutch 35 is switched to the connected state. (iii) The control device 51 receives a signal from the engine 10 indicating that the combustion operation of the engine 10 has stopped. For example, when the rotation of the crankshaft 15 has stopped, the engine 10 outputs a signal indicating that the combustion operation has stopped. Furthermore, a signal indicating that the combustion operation is stopped may be output from the starter generator 40 , for example. After detecting the stall of the engine 10 in step S105, the control device 51 receives a signal indicating that the manual clutch 35 is switched to the disconnected state in the non-neutral state in step S106. Upon receipt of this signal, the control device 51 causes the starter generator 40 to restart the engine 10 in step S107.

Next, the MT-type straddle-type vehicle 1 of this embodiment will be described in comparison with the MT-type four-wheeled vehicle 100 shown in FIGS. 1(d) and 1(e) . For example, it is considered that the MT type four-wheel vehicle 100 that performs idle stop is configured to start the engine 110 by depressing the clutch pedal 136 after the engine 110 is stopped due to the idle stop. In this MT type four-wheel vehicle 100, the starting operation is performed as follows. After the engine 110 is stopped due to idling stall, the driver starts the engine 110 by depressing the clutch pedal 136 during starting. Secondly, in order to increase the rotation speed of the engine 110, the driver switches his right foot from the brake pedal 122 to the accelerator pedal 116. During this period, the driver's left foot is pressing the clutch pedal 136 . Next, the driver depresses the accelerator pedal 116 and simultaneously operates his left foot in the direction of releasing the clutch pedal 136 to create a half-clutch state. Therefore, a time lag occurs from when the engine 110 is started by depressing the clutch pedal 136 to when the foot is operated in the direction of releasing the clutch pedal 136 . During this time lag, the rotational speed of the activated engine 110 increases.

In contrast, the driver of the MT-type straddle-type vehicle 1 can operate the accelerator grip 16, the clutch lever 36, and the brake pedal 22 in a short time or at the same time. Therefore, in the MT-type straddle-type vehicle 1 that performs idling stop, the time from starting the engine 10 to connecting the manual clutch 35 may be short. That is, the driver of the MT-type straddle-type vehicle 1 sometimes performs an operation to connect the manual clutch 35 in a short time after starting the engine 10 .

In addition, the MT-type straddle-type vehicle 1 is smaller and lighter than a car, for example, and the inertia of the crankshaft 15 of the engine 10 mounted on the MT-type straddle-type vehicle 1 is also small. Therefore, when the manual clutch 35 of the engine 10 is in the connected state, the engine 10 may stall.

Furthermore, for example, when starting the engine of an MT-type straddle-type vehicle having a starter motor provided independently of a generator, the starter motor drives the crankshaft through a power transmission member such as a one-way clutch or a reduction gear. Therefore, this type of MT straddle-type vehicle will produce the sound of one-way clutch or gear operation when the engine is started. In contrast, in the MT type straddle-type vehicle 1 having the starter generator 40 shown in FIG. 1(a) , power is transmitted from the starter generator 40 to the crankshaft 15 without passing through a one-way clutch or a reduction gear. Therefore, the MT-type straddle-type vehicle 1 having the starter generator 40 makes less noise when starting than an MT-type straddle-type vehicle having a starter motor that is independent of the generator. Therefore, it is difficult for the driver to recognize the starting state of the engine 10 . In this case, the driver sometimes performs the operation of connecting the manual clutch 35 immediately after starting the engine 10 without confirming that the starting operation of the engine 10 is completed. Therefore, in the MT type straddle-type vehicle 1 provided with the starter generator 40, the engine 10 may stall during the starting operation.

When the engine 10 stalls due to the connection operation of the manual clutch 35 for starting the MT type straddle-type vehicle 1, the manual transmission 30 is in a non-neutral state. At this time, the driver of the MT-type straddle-type vehicle 1 can start the engine 10 by holding the clutch lever 36 and operating the manual clutch 35 in a cut-off state in the non-neutral state. That is, when the MT type straddle-type vehicle 1 is started after the engine 10 is stopped due to idling stall, and the engine 10 stalls due to the operation for starting, it can be started again simply by holding the clutch lever 36. Start the engine10. Furthermore, in the MT type straddle-type vehicle 1, the engine 10 may stall when the clutch lever 36 is released. Therefore, by holding the clutch lever 36 that is the target of the release operation again and returning to the previous state, the engine 10 can be restarted without performing a shifting operation in the non-neutral state. In addition, the starter generator 40 transmits power to the crankshaft 15 without passing through a one-way clutch, a reduction gear, or the like. Therefore, the sound when restarting is smaller. In this way, in the MT type straddle-type vehicle 1, after the engine 10 is started after being stopped due to idling stall, when the engine 10 stalls during the starting operation, the process for restarting the engine 10 can be performed quietly, quickly, and simply. operate. Thereby, in the MT-type straddle-type vehicle 1, the convenience of the operation for starting from the idle-stop state can be further improved.

[Second Embodiment] A second embodiment of the present invention will be described. FIG. 2 is a flowchart showing the operation of the control device 52 of the MT-type straddle-type vehicle 2 according to the second embodiment of the present invention. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the MT-type straddle-type vehicle 1 shown in FIG. 1 .

The MT-type straddle-type vehicle 2 of this embodiment is provided with a control device 52 . The control device 52 stops the engine 10 when the idle stall condition is satisfied (steps S101-1 and S101-2). The idling stall condition of this embodiment includes that the manual transmission 30 is in a neutral state. That is, the control device 52 stops the engine 10 ( Step S102).

In the MT-type straddle-type vehicle 2 of the present embodiment, the manual transmission 30 enters the non-neutral state according to the operation during the period from the idle stop state to the start. The MT-type straddle-type vehicle 2 can simplify the operation of restarting the engine 10 when the engine 10 stalls, even when the number of operations from the idle shutdown state to starting is increased. Therefore, the MT-type straddle-type vehicle 2 can improve the convenience of operation for starting from the idle-stop state.

[Third Embodiment] A third embodiment of the present invention will be described. FIG. 3 is a flowchart showing the operation of the control device 53 of the MT-type straddle-type vehicle 3 according to the third embodiment of the present invention. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the MT-type straddle-type vehicle 1 shown in FIG. 1 . In addition, this embodiment may be combined with the second embodiment.

The MT-type straddle-type vehicle 3 of this embodiment is provided with a control device 53 . The control device 53 is configured to provide assistance for starting the vehicle when the vehicle has not started after starting the engine 10 through a series of processes (A) to (C) below. A series of processes (A) to (C) are shown in steps S101 to S107 and S301 in FIG. 3 .

Process (A) is a process of stopping the engine 10 by satisfying the idle shutdown condition. When the control device 53 determines that the idle stall condition is satisfied in step S101, it stops the combustion operation of the engine 10 in step S102.

Process (B) is a process in which, when the engine 10 is stopped due to the process (A), after the manual transmission 30 switches from the neutral state to the non-neutral state, the manual clutch 35 switches to the disconnected state. When the opportunity arises, the engine 10 is started by starting the generator 40 . In step S301, the control device 53 receives a signal from the gear position sensor 301 indicating that the manual transmission 30 switches from the neutral state to the non-neutral state. Thereafter, when a signal indicating that the manual clutch 35 is switched to the disconnected state is received from the clutch lever position sensor 361 in step S103, the control device 53 causes the starter generator 40 to start the engine 10 via the driver 45 in step S104.

Process (C) is a process in which, after starting the engine 10 according to process (B), when the manual transmission 30 is in the non-neutral state, the manual clutch 35 is switched to the connected state and the engine 10 stalls. The engine 10 is restarted by the starter generator 40 . In step S105, the control device 53 detects the stall of the engine 10 caused by the manual clutch 35 being switched to the connected state when the manual transmission 30 is in the non-neutral state. After detecting the stall of the engine 10 in step S105, the control device 53 receives a signal indicating that the manual clutch 35 is switched to the disconnected state in the non-neutral state in step S106. Upon receipt of the signal, the control device 53 causes the starter generator 40 to restart the engine 10 in step S107. Furthermore, stalling of the engine 10 caused by switching the manual clutch 35 to the connected state while the manual transmission 30 is in the non-neutral state is determined based on the same conditions as in the first embodiment.

In the MT-type straddle-type vehicle 3 , after the engine 10 is stopped due to idling stall and the manual transmission 30 is shifted to the non-neutral state, the engine 10 is started based on the transition of the manual clutch 35 to the cut-off state. When the manual transmission 30 is shifted to the non-neutral state while the engine 10 is stopped, there is a high possibility that an operation for starting the engine 10 will be performed thereafter. The MT type straddle-type vehicle 3 can start the engine 10 in a state where the possibility of performing an operation for starting the engine 10 is high. In addition, the engine 10 is in a non-neutral state when it is started, so the operation of setting the engine 10 to a non-neutral state after starting can be omitted. Therefore, the MT type straddle-type vehicle 3 that performs idling stop can further improve the convenience of the operation for starting the engine 10 from the idling stop state.

[4th Embodiment] The fourth embodiment of the present invention will be described. FIG. 4 is a flowchart showing the operation of the control device 54 of the MT-type straddle-type vehicle 4 according to the fourth embodiment of the present invention. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the MT-type straddle-type vehicle 1 shown in FIG. 1 .

The MT-type straddle-type vehicle 4 of this embodiment is provided with a control device 54 . The control device 54 stops the engine 10 by satisfying the idle shutdown condition (steps S101-3 and S101-4). In this embodiment, the fact that the manual transmission 30 is in a non-neutral state is included in the idle stop condition. That is, when the manual transmission 30 is in the non-neutral state (step S101-3), the control device 54 of the MT type straddle-type vehicle 4 satisfies the idle shutdown condition other than the state of the manual transmission 30 (step S101 -4), then stop the engine 10 (step S102).

In the MT-type straddle-type vehicle 4, one of the idling stall conditions is that the manual transmission 30 is in a non-neutral state. Thereby, the MT-type straddle-type vehicle 4 can maintain the non-neutral state from the stop of the engine 10 due to idling stall to the start and start of the engine 10 . Therefore, for example, the gear shifting operation in the period from stop to start of the engine 10 can be omitted. Thereby, the MT-type straddle-type vehicle 4 can further improve the convenience of operation for starting from the idle-stop state.

[5th Embodiment] The fifth embodiment of the present invention will be described. FIG. 5 is a flowchart showing the operation of the control device 55 of the MT-type straddle-type vehicle 5 according to the fifth embodiment of the present invention. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the MT-type straddle-type vehicle 1 shown in FIG. 1 . In addition, this embodiment can be combined with any one of the second to fourth embodiments.

The MT-type straddle-type vehicle 5 of this embodiment is provided with a control device 55 . The control device 55 is configured to provide assistance for starting the vehicle when the vehicle does not start after the engine 10 is started, through a series of processes (A) to (C) below. A series of processes (A) to (C) are shown in steps S101 to S107 and S501 in FIG. 5 .

Process (A) is a process of stopping the engine 10 by satisfying the idle shutdown condition. When the control device 55 determines that the idle stall condition is satisfied in step S101, it stops the combustion operation of the engine 10 in step S102. Process (B) is a process in which, when the manual transmission 30 is in the non-neutral state and the engine 10 is stopped due to process (A), the manual clutch 35 is switched to the disconnected state as an opportunity. The starter generator 40 starts the engine 10 . In step S501, the control device 55 receives a signal indicating that the manual transmission 30 is in a non-neutral state from the gear position sensor 301. Thereafter, when a signal indicating that the manual clutch 35 is switched to the disconnected state is received from the clutch lever position sensor 361 in step S103, the control device 55 causes the starter generator 40 to start the engine 10 in step S104.

Process (C) is a process that, after at least starting the engine 10 according to process (B), when the manual transmission 30 is in a non-neutral state and the manual clutch 35 is switched to the connected state and the engine 10 stalls, The engine 10 is restarted by the starter generator 40 . In step S105, the control device 55 detects the stall of the engine 10 caused by the manual clutch 35 being switched to the connected state when the manual transmission 30 is in the non-neutral state. After detecting the stall of the engine 10 in step S105, the control device 55 receives a signal indicating that the manual clutch 35 is switched to the disconnected state in the non-neutral state in step S106. Upon receipt of this signal, the control device 55 causes the starter generator 40 to restart the engine 10 in step S107. Stalling of the engine 10 due to the manual clutch 35 being switched to the connected state is determined based on the same conditions as those in the first embodiment.

In the MT type straddle-type vehicle 5 , when the manual transmission 30 is in a non-neutral state and the engine 10 is stopped due to the process (A), the manual clutch 35 is switched to OFF based on the driver's operation. The status is an opportunity, start the engine 10. According to the MT type straddle-type vehicle 5, after the engine 10 is stopped due to idling stall, the engine 10 can be restarted without placing the manual transmission 30 in neutral. Thereby, in the MT type straddle-type vehicle 5 that executes idling stop, the convenience of operation for starting from the idling stop state can be further improved.

[Sixth Embodiment] The sixth embodiment of the present invention will be described. FIG. 6 is a diagram showing the structure of an MT-type straddle-type vehicle 6 according to the sixth embodiment of the present invention. Here, FIG. 6( a ) schematically shows a left side view of the MT type straddle type vehicle 6 . FIG. 6( b ) is a right view schematically showing a part of the MT type straddle type vehicle 6 . FIG. 6(c) is a flowchart showing the operation of the control device 56 of the MT-type straddle-type vehicle 6 . In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the MT-type straddle-type vehicle 1 shown in FIG. 1 . In addition, this embodiment can be combined with any one of the second to fifth embodiments.

The MT type straddle-type vehicle 6 of this embodiment is provided with the battery 42 which supplies electric power to the starter generator 40. The control device 56 of the MT-type straddle-type vehicle 6 of the present embodiment uses the switching of the manual clutch 35 to the disconnected state as an opportunity to limit the number of restarts of the engine 10 to less than the upper limit number of restarts. The control device 56 counts the number N of restarts triggered by the operation of the manual clutch 35 in the process (C) of the first embodiment. When it is determined that the number of times processing (C) is performed exceeds the upper limit number of restarts Nmax, the control device 56 stops the processing of restarting the engine 10 triggered by the operation of the manual clutch 35 . Thereafter, when the driver stalls the engine 10 due to the operation for starting the vehicle, the engine 10 is started using the start switch 41 (see FIG. 6(b) ). In addition, the engine 10 can also be started by a kick starter (not shown).

Specifically, as shown in FIG. 6(c) , the control device 56 performs the same processes (A) to (C) (steps S101 to 107) as in the first embodiment, and then restarts the engine in step S601. Count N times 10. Next, when the control device 56 determines in step S602 that the number of engine restarts N exceeds the upper limit number of restarts Nmax (YES in step S602), the operation proceeds to step S603. In this case, when the manual transmission 30 is in a non-neutral state and the engine 10 stalls because the manual clutch 35 is switched to the connected state, the engine 10 will not be restarted by cutting off the manual clutch 35 . The driver restarts the engine 10 by a method other than switching the manual clutch 35 to the cut-off state. For example, after detecting the stall of the engine 10 caused by the manual clutch 35 being switched to the connected state in step S603, the control device 56 receives the opening signal of the start switch 41 in step S604. When receiving the on signal of the start switch 41, the control device 56 restarts the engine 10 by starting the generator 40 in step S605. When the control device 56 determines that the number of engine restarts N does not exceed the upper limit number of restarts Nmax (NO in step S602), the operation returns to step S105.

Since the MT-type straddle-type vehicle 6 pursues small size and light weight, the battery 42 mounted on the MT-type straddle-type vehicle 6 also pursues small size. In the MT-type straddle-type vehicle 6 of this embodiment, the number of times that the engine 10 is restarted is limited to the upper limit number of restarts Nmax, triggered by the transition of the manual clutch 35 to the disconnected state. Thereby, the MT type straddle-type vehicle 6 can suppress the power consumption caused by restarting the engine 10, and therefore can use a small battery 42. Furthermore, in the MT-type straddle-type vehicle 6, the number of times the engine 10 can be restarted due to clutch operation is limited. Therefore, wear of the manual clutch 35 can be suppressed. That is, according to the MT type straddle-type vehicle 6 of the present embodiment, in a vehicle that performs idling stop, a small battery 42 is used to suppress the wear of the manual clutch 35 and further improve the operation efficiency for starting from the idling stop state. Convenience.

[Seventh Embodiment] The seventh embodiment of the present invention will be described. FIG. 7 is a flowchart showing the operation of the control device 57 of the MT-type straddle-type vehicle 7 according to the seventh embodiment of the present invention. In this embodiment, the control device 57 is configured to perform the operations shown in FIG. 7 . In addition, elements other than the control device 57 of this embodiment have the same structure as that of the first embodiment. In addition, this embodiment can be combined with any one of the second to sixth embodiments.

The control device 57 of the MT-type straddle-type vehicle 7 of the present embodiment stops the engine 10 by satisfying the idle stall condition (step S101). When the engine 10 is stopped due to the satisfaction of the idle stop condition, the control device 57 does not start the engine 10 until the manual clutch 35 is switched to the disconnected state and starts the engine 10 (for example, steps S102 and S103). That is, after stopping the combustion operation of the engine 10 in step S102, the control device 57 prohibits the starting of the engine 10 (step S102-2). At this time, the control device 57 does not start the engine 10 regardless of whether the manual transmission 30 is in the neutral state or the non-neutral state. Thereby, the MT-type straddle-type vehicle 7 of this embodiment can suppress the behavior change of the vehicle body during idling shutdown. The condition for releasing the start prohibition is that the manual clutch 35 is switched to the cut-off state. That is, after step S102-2, when a signal indicating that the manual clutch 35 is switched to the disconnected state is received from the clutch lever position sensor 361 in step S103, the start of the engine 10 is canceled in step S103-2. prohibit.

1,2,3,4,5,6,7: MT type straddle vehicle 10:Engine 15:Crankshaft 16:Accelerator grip 21:Driving wheel 22:brake pedal 30:Manual transmission 31: Power transmission path 35:Manual clutch 36:Clutch lever 40: Start the generator 41:Start switch 42:Battery 45: drive 51,52,53,54,55,56,57: Control device 100: MT four-wheel vehicle 110:Engine 116:Accelerator pedal 122:brake pedal 136:Clutch pedal 301: Gear position sensor 361:Clutch lever position sensor

FIG. 1(a) is a left side view schematically showing the MT type straddle-type vehicle according to the first embodiment. (b) is a right view schematically showing a part of the MT type straddle-type vehicle shown in (a). (c) is a flow chart showing the operation of the control device of the MT type straddle type vehicle shown in (a). (d) is a left side view showing the structure of an MT type four-wheel vehicle as a comparative example. (e) is an enlarged view of the pedal portion of the MT type four-wheel vehicle shown in (d). FIG. 2 is a flowchart showing the operation of the control device of the MT-type straddle-type vehicle according to the second embodiment of the present invention. FIG. 3 is a flowchart showing the operation of the control device of the MT-type straddle-type vehicle according to the third embodiment of the present invention. FIG. 4 is a flowchart showing the operation of the control device of the MT-type straddle-type vehicle according to the fourth embodiment of the present invention. FIG. 5 is a flowchart showing the operation of the control device of the MT-type straddle-type vehicle according to the fifth embodiment of the present invention. FIG. 6 is a diagram showing the structure of an MT-type straddle-type vehicle according to the sixth embodiment of the present invention. (a) is a left side view schematically showing the MT type straddle type vehicle. (b) is a right view schematically showing a part of the MT-type straddle-type vehicle. (c) is a flow chart showing the operation of the control device of the MT-type straddle-type vehicle. 7 is a flowchart showing the operation of the control device of the MT-type straddle-type vehicle according to the seventh embodiment of the present invention.

1: MT type straddling vehicle

10:Engine

15:Crankshaft

16:Accelerator grip

21:Driving wheel

22:brake pedal

30:Manual transmission

31: Power transmission path

35:Manual clutch

36:Clutch lever

40: Start the generator

45:Drive

51:Control device

100: MT four-wheel vehicle

110:Engine

116:Accelerator pedal

122:brake pedal

136:Clutch pedal

301: Gear position sensor

361:Clutch lever position sensor

Claims (13)

An MT type straddle-type vehicle, the above-mentioned MT type straddle-type vehicle is provided with: an engine, which has a crankshaft, and outputs power generated by combustion through the above-mentioned crankshaft that rotates; and drive wheels, which receive the power output from the above-mentioned engine, Driving the above-mentioned MT type straddle-type vehicle; a manual transmission that changes the gear ratio between the above-mentioned engine and the above-mentioned driving wheels to multiple stages including neutral state and non-neutral state according to the driver's operation; a clutch lever , which accepts the driver's clutch operation; a manual clutch, which is provided on the power transmission path between the above-mentioned engine and the above-mentioned manual transmission, and according to the above-mentioned driver's operation of the above-mentioned clutch lever, the above-mentioned engine and the above-mentioned manual transmission The power transmission between the engines is intermittent; a crankshaft-linked starter generator is connected to the crankshaft in a manner that is linked to the crankshaft without a clutch, and when the above-mentioned engine is started, the above-mentioned engine is started by driving the above-mentioned crankshaft. The engine is driven by the crankshaft to generate electricity during the combustion operation; and a control device is configured to perform a process for starting the vehicle when the vehicle does not start after the engine is started, through a series of processes (A) to (C) below. Auxiliary, the above-mentioned processing (A) ~ (C) are: (A) processing, stopping the above-mentioned engine by satisfying the idle stall condition; (B) processing, when the above-mentioned engine is stopped due to the above-mentioned processing (A), to stop the above-mentioned engine according to the above-mentioned processing (A) The driver's operation of the clutch lever causes the manual clutch to switch to the cut-off state as an opportunity to start the engine through the crankshaft-linked starter generator; and (C) processing, at least after starting the above-mentioned processing (B) After the engine, when the manual When the transmission is in the above-mentioned non-neutral state and the above-mentioned driver operates the above-mentioned clutch lever to start the vehicle and the above-mentioned manual clutch is converted to the connected state causing the above-mentioned engine to stall, the above-mentioned driver is in the above-mentioned non-neutral state. The operation of the clutch lever causes the manual clutch to switch to a cut-off state, and the crankshaft-linked starter generator rotates the crankshaft without passing through the clutch, thereby restarting the engine. For example, the MT type straddle-type vehicle of claim 1, wherein the above-mentioned idle stall condition includes the above-mentioned manual transmission being in a neutral state. For example, the MT-type straddle-type vehicle of claim 1, wherein the above-mentioned process (B) is when the above-mentioned engine is stopped due to the above-mentioned process (A), after the above-mentioned manual transmission is converted from the neutral state to the above-mentioned non-neutral state, in The above-mentioned manual clutch is switched to the cut-off state according to the above-mentioned driver's operation as an opportunity to start the above-mentioned engine. For example, the MT-type straddle-type vehicle of claim 2, wherein the above-mentioned process (B) is when the above-mentioned engine is stopped due to the above-mentioned process (A), and after the above-mentioned manual transmission is converted from the neutral state to the above-mentioned non-neutral state, in The above-mentioned manual clutch is switched to the cut-off state according to the above-mentioned driver's operation as an opportunity to start the above-mentioned engine. For example, the MT type straddle-type vehicle of claim 1, wherein the above-mentioned idle stall condition includes the above-mentioned manual transmission being in the above-mentioned non-neutral state. For example, the MT type straddling vehicle of claim 1, wherein When the above-mentioned process (B) is in the above-mentioned non-neutral state and the above-mentioned engine is stopped due to the above-mentioned process (A), the above-mentioned manual clutch is converted to the cut-off state according to the above-mentioned driver's operation. opportunity to start the above engine. For example, the MT-type straddle-type vehicle of claim 2, wherein the above-mentioned processing (B) is performed according to the above-mentioned driving when the above-mentioned manual transmission is in the above-mentioned non-neutral state and the above-mentioned engine is stopped due to the above-mentioned processing (A). The operator's operation causes the above-mentioned manual clutch to switch to the cut-off state as an opportunity to start the above-mentioned engine. For example, the MT-type straddle-type vehicle of claim 3, wherein the above-mentioned processing (B) is in the condition that the above-mentioned manual transmission is in the above-mentioned non-neutral state, and the above-mentioned engine is stopped due to the above-mentioned processing (A), the above-mentioned driving operation is performed according to the above-mentioned driving method. The operator's operation causes the above-mentioned manual clutch to switch to the cut-off state as an opportunity to start the above-mentioned engine. For example, the MT-type straddle-type vehicle of claim 4, wherein the above-mentioned processing (B) is in the condition that the above-mentioned manual transmission is in the above-mentioned non-neutral state, and the above-mentioned engine is stopped due to the above-mentioned processing (A), the above-mentioned driving operation is performed according to the above-mentioned driving method. The operator's operation causes the above-mentioned manual clutch to switch to the cut-off state as an opportunity to start the above-mentioned engine. For example, the MT-type straddle-type vehicle of claim 5, wherein the above-mentioned processing (B) is in the condition that the above-mentioned manual transmission is in the above-mentioned non-neutral state, and the above-mentioned engine is stopped due to the above-mentioned processing (A), the above-mentioned driving operation is performed according to the above-mentioned driving method. The operator's operation causes the above-mentioned manual clutch to switch to the cut-off state as an opportunity to start the above-mentioned engine. For example, the MT-type straddle-type vehicle according to any one of claims 1 to 10, wherein the control device uses the switching of the manual clutch to the cut-off state as an opportunity to limit the number of restarts of the engine to less than the upper limit of restarts. As claimed in any one of claims 1 to 10, the MT type straddle-type vehicle, wherein the above-mentioned control device stops the above-mentioned engine by satisfying the above-mentioned idle shutdown condition, when the above-mentioned engine is stopped due to satisfying the above-mentioned idle shutdown condition, until the above-mentioned Until the manual clutch is switched to the cut-off state as an opportunity to start the engine, the engine will not be started regardless of whether the manual transmission is in the neutral state or the non-neutral state. For example, the MT type straddle-type vehicle of claim 11, wherein the above-mentioned control device stops the above-mentioned engine by satisfying the above-mentioned idle shutdown condition, and when the above-mentioned engine stops because the above-mentioned idle shutdown condition is satisfied, until the above-mentioned manual clutch is switched to cut-off Until the state is an opportunity to start the engine, the engine will not be started regardless of whether the manual transmission is in the neutral state or the non-neutral state.