WO2022118362A1

WO2022118362A1 - Mt-type straddled vehicle

Info

Publication number: WO2022118362A1
Application number: PCT/JP2020/044598
Authority: WO
Inventors: 陽至日野; 誠小杉
Original assignee: ヤマハ発動機株式会社
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2022-06-09
Also published as: TW202229716A; JPWO2022118786A1; TWI814159B; WO2022118786A1

Abstract

Provided is an MT-type straddled vehicle in which an engine is stopped during idling and which exhibits improved convenience in operation for starting from the engine stop state. This MT-type straddled vehicle performs: (A) stopping an engine when a condition of an engine stop during idling is satisfied; (B) while the engine is stopped by process (A), starting the engine in response to transition to a clutch disengagement state resulting from an operation performed on a clutch lever by a driver; and (C) following the starting of the engine by process (B), when the engine has stalled as a result of transition to a clutch engagement state resulting from an operation performed on the clutch lever by the driver under a condition where a manual transmission is in a non-neutral state, restarting the engine in response to transition to a clutch disengagement state resulting from an operation performed on the clutch lever by the driver.

Description

MT type straddle vehicle

The present invention relates to an MT type saddle-mounted vehicle.

In MT (manual transmission) type saddle-mounted vehicles that perform idling stop, if the engine is stopped by satisfying the idling stop conditions, there are vehicles that can restart the engine by simple operation. For example, in the MT type saddle-mounted vehicle of Patent Document 1, when the engine is stopped due to idling stop, a flag indicating the idling stop state is recorded, the engine restart condition is satisfied, and the clutch is disengaged. When the clutch lever is operated in this way, the engine is restarted by the starter motor. When the engine is restarted, the flag indicating the idling stop state is cleared. In the MT type saddle-mounted vehicle of Patent Document 1, the engine can be started by operating the clutch lever when the engine is in the idling stop state.

Japanese Unexamined Patent Publication No. 2016-156346

For MT type saddle-mounted vehicles that perform idling stop, it is desired to further enhance the convenience of operation for starting from the idling stop state. An object of the present invention is to provide an MT-type saddle-mounted vehicle that performs idling stop with improved convenience of operation for starting from an idling-stop state.

The present inventor examined the operation when starting from the idling stop state in the MT type saddle-mounted vehicle that performs idling stop. In this study, the present inventor finds that the use of limbs in the starting operation of an MT type saddle-mounted vehicle that performs idling stop is different from the usage of limbs in the starting operation of an MT type four-wheeled vehicle that performs idling stop. I paid attention to that. Therefore, the present inventor has noticed that in the operation of the MT type saddle-mounted vehicle, the engine may stop depending on the timing of the operation.

In an MT type four-wheeled vehicle, the clutch is operated by the driver operating the clutch pedal with his left foot. The driver disengages the clutch by depressing the clutch pedal with his left foot, and engages the clutch by releasing his left foot from the clutch pedal. The accelerator is operated 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 brake is operated 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 type four-wheeled vehicle, it is difficult to operate both the accelerator and the brake at the same time, so that a general driver usually does not operate both the accelerator and the brake at the same time.

Here, in an MT type four-wheeled vehicle that performs idling stop, it is conceivable that the engine is started by the driver depressing the clutch pedal after the engine is stopped by idling stop. In such an MT type four-wheeled vehicle, the starting operation is considered to be performed as follows. After the engine is stopped by idling stop, the driver starts the engine by depressing the clutch pedal when starting. Next, the driver steps his right foot from the brake pedal to the accelerator pedal in order to increase the engine speed. During this time, the driver's left foot is depressing the clutch pedal. Next, the driver operates the left foot in the direction of releasing the clutch pedal at the same time as depressing the accelerator pedal to create a half-clutch state. Therefore, there is a time lag between the start of the engine in response to the driver's depression of the clutch pedal and the operation of the driver's foot in the direction away from the clutch pedal. During this time, the rotational speed of the started engine increases.

On the other hand, in the MT type saddle-mounted vehicle, the clutch is operated by the driver operating the clutch lever with his left hand. The driver disengages the clutch by grasping the clutch lever with his left hand, and engages the clutch by releasing his left hand from the clutch lever. The accelerator is operated by the driver operating the grip with his right hand. The driver increases the engine speed by rotating the accelerator grip. The brake is operated, for example, by the driver operating the rear wheel brake pedal with his right foot. The driver applies the rear wheel brake by depressing the rear wheel brake pedal with his right foot. Therefore, in the MT type saddle-mounted vehicle, the driver operates the accelerator grip with the right hand and the rear wheel brake pedal with the right foot, so that both the accelerator and the brake can be operated at the same time.

For example, in the MT type saddle-mounted vehicle of Patent Document 1, the starting operation procedure is as follows. After the engine is stopped by idling stop, the driver starts the engine by grasping the clutch lever. At this time, the driver increases the engine speed while operating the accelerator grip with his right hand. At the same time, the driver operates the clutch lever with his left hand in the direction of releasing the clutch lever to connect the clutch. Then, the driver operates the rear wheel brake pedal with his right foot. The driver of the MT-type saddle-mounted vehicle can simultaneously start the operation of the accelerator grip, the operation of the clutch lever, and the operation of the brake pedal. Therefore, in the MT type saddle-mounted vehicle, the time lag from the start of the engine to the driver operating the accelerator to connect the clutch can be reduced. The driver can perform the operation of engaging the clutch in a short time after starting the engine. In this case, the clutch is engaged after the engine speed has increased sufficiently after starting. Then, the rotation speed of the engine decreases, and the engine may stall. Further, the MT type saddle-mounted vehicle is small and lightweight, and the inertia of the crank shaft of the engine mounted on the MT-type saddle-mounted vehicle is small. Therefore, if the clutch is engaged before the engine speed has sufficiently increased after starting, the engine may stall. Therefore, in the MT type saddle-mounted vehicle, the engine may stall in the operation at the time of starting because the limbs assigned to the operation are different from the case of the MT type four-wheeled vehicle.

Therefore, the present inventor further investigated the stall of the engine at the time of starting the MT type saddle-mounted vehicle that performs idling stop. In this study, the present inventor considered to start the engine by a simple operation when the engine stalls when the driver performs the start operation after the engine stopped by the idling stop is started.
Specifically, the control device for the MT saddle-mounted vehicle is configured to perform the following processes (A) to (C). Processings (A) to (C)
(A) Processing to stop the engine by satisfying the idling stop condition,
(B) When the engine is stopped due to the process (A), the process of starting the engine triggered by the transition to the disengaged state of the clutch according to the operation of the clutch lever by the driver.
(C) Following the engine start by the process (B), it is caused by the transition to the clutch connection state according to the operation of the clutch lever by the driver in the situation where the manual transmission is in the non-neutral state. Then, when the engine stalls, the process of restarting the engine is triggered by the transition to the disengaged state of the clutch in response to the operation of the clutch lever by the driver.

As mentioned above, the MT type saddle-type vehicle that performs idling stop may cause the engine to stall in the operation at the time of starting because the limbs assigned to the operation are different from those of the MT type four-wheeled vehicle. be. However, even if the engine is stalled by the operation at the time of starting after the engine stopped by the idling stop is started, the engine can be restarted by a simple operation of grasping the clutch lever. Further, in the MT type saddle-mounted vehicle, the engine stalls when the clutch lever is released. Therefore, the engine can be restarted by grasping the clutch lever, which was the target of the release operation, and returning it to the previous state. Therefore, the MT type saddle-mounted vehicle of the present invention simplifies the operation of restarting the engine when the engine stalls when the driver performs the starting procedure after the engine stopped by the idling stop is started. be able to. As a result, in the MT type saddle-mounted vehicle that performs idling stop, the convenience of the operation for starting from the idling stop state can be further enhanced.

In order to achieve the above object, according to one viewpoint of the present invention, the MT type saddle-mounted vehicle has the following configuration.
(1) MT type saddle-mounted vehicle
An engine that has a crank shaft and outputs the power generated by combustion via the rotating crank shaft.
The drive wheels that receive the power output from the engine and drive the MT type saddle-type vehicle,
A manual transmission that changes the gear ratio between the engine and the drive wheels in multiple stages including a neutral state and a non-neutral state according to the driver's operation.
The clutch lever that receives the driver's clutch operation and
A clutch provided in the power transmission path between the engine and the manual transmission to interrupt the power transmission between the engine and the manual transmission in response to the driver's operation on the clutch lever. ,
It is connected to the crank shaft so that power is transmitted to and from the crank shaft without a clutch, and the engine is started by driving the crank shaft when the engine is started. A starting generator driven by the crank shaft to generate power,
The following processes (A) to (C) are configured to be performed, and the processes (A) to (C) are
(A) The process of stopping the engine when the idling stop condition is satisfied, and
(B) When the engine is stopped by the process (A), the process of starting the engine triggered by the transition to the disengaged state of the clutch in response to the operation of the driver to the clutch lever. ,
(C) Following the start of the engine by the process (B), the clutch connection state according to the operation of the clutch lever by the driver under the situation where the manual transmission is in the non-neutral state. When the engine stalls due to the transition to, the process of restarting the engine triggered by the transition to the disengaged state of the clutch in response to the operation of the driver to the clutch lever. It is equipped with a control device.

The MT type saddle-mounted vehicle of (1) includes an engine, drive wheels, a manual transmission, a clutch lever, a clutch, and a starting generator.
The engine has a crank shaft. The engine outputs the power generated by combustion via the rotating crank shaft.
The drive wheels receive the power output from the engine to drive the MT-type saddle-type vehicle.
The manual transmission changes the gear ratio between the engine and the drive wheels in multiple stages including a neutral state and a non-neutral state according to the operation of the driver.
The clutch lever receives the driver's clutch operation. The clutch lever is operated by the driver's hand.
The clutch is provided in the power transmission path between the engine and the manual transmission. The clutch interrupts and disengages power transmission between the engine and the manual transmission in response to the driver's operation of the clutch lever.
The starting generator is connected to the crank shaft so that power is transmitted to and from the crank shaft without a clutch. The starting generator starts the engine by driving the crank shaft when the engine is started, and is driven by the crank shaft to generate electricity during the combustion operation of the engine.

Further, the MT type saddle-mounted vehicle of (1) is provided with a control device.
The control device is configured to perform the following processes (A) to (C). Here, the processes (A) to (C) are
(A) Processing to stop the engine by satisfying the idling stop condition,
(B) When the engine is stopped due to the process (A), the process of starting the engine triggered by the transition to the disengaged state of the clutch according to the operation of the clutch lever by the driver.
(C) Following the engine start by the process (B), it is caused by the transition to the clutch connection state according to the operation of the clutch lever by the driver in the situation where the manual transmission is in the non-neutral state. Then, when the engine stalls, the process of restarting the engine is triggered by the transition to the disengaged state of the clutch in response to the operation of the clutch lever by the driver.

For example, unlike the case of an MT-type four-wheeled vehicle that stops idling, the driver of an MT-type saddle-mounted vehicle operates the accelerator grip, the clutch lever, and the brake pedal for a short time or at the same time. Can be done. Therefore, the MT type saddle-mounted vehicle that performs idling stop may have a small time lag from the start of the engine to the engagement of the clutch. Therefore, the driver may perform an operation of engaging the clutch in a short time after starting the engine. Further, since the MT type saddle-mounted vehicle is small and lightweight, the inertia of the crank shaft of the engine is small. Therefore, the engine may stall.

In addition, when the engine is started in an MT type saddle-mounted vehicle in which the starter motor is installed separately from the generator, the starter motor drives the crank shaft via a power transmission member such as a one-way clutch or a gear. Therefore, such an MT type saddle-mounted vehicle produces an operating noise of a one-way clutch, a gear, or the like when the engine is started. On the other hand, in an MT type saddle-mounted vehicle having a starting generator, power is transmitted from the starting generator to the crank shaft without using a clutch. Therefore, the MT-type saddle-mounted vehicle having a starting generator has a smaller starting noise than the MT-type saddle-mounted vehicle in which the starter motor is provided separately from the generator. Therefore, it is difficult for the driver to recognize the starting state of the engine. In this case, the driver may engage the clutch immediately after the start of the engine start without recognizing the start state of the engine. Therefore, in an MT-type saddle-mounted vehicle having a starting generator, the engine may stall during the operation at the time of starting.

In the MT type saddle-mounted vehicle of (1), after the engine stalls due to the driver's starting operation after idling stop, the engine can be started by the operation of grasping the clutch lever to disengage the clutch. That is, in the MT type saddle-mounted vehicle of (1), even if the engine stalls due to the operation at the time of starting after the engine stopped by the idling stop is started, the engine can be restarted by the operation of grasping the clutch lever. Further, in the MT type saddle-mounted vehicle, the engine stalls when the clutch lever is released. Therefore, the engine can be restarted by grasping the clutch lever, which was the target of the release operation, and returning it to the previous state. Therefore, in the MT type saddle-mounted vehicle of (1), if the engine stalls when the start operation is performed after the engine stopped by the idling stop is started, the operation for restarting the engine should be simplified. Can be done. Thereby, according to the configuration of (1), in the MT type saddle-mounted vehicle that performs idling stop, the convenience of the operation for starting from the idling stop state can be further enhanced.

According to one aspect of the present invention, the MT type saddle-mounted vehicle can adopt the following configuration.
(2) The MT type saddle-mounted vehicle of (1).
The control device limits the number of times the engine is restarted triggered by the transition of the clutch to the disengaged state to the number of times of the upper limit of restarting or less.

Since the MT type saddle-mounted vehicle is required to be small and lightweight, the battery mounted on the MT-type saddle-mounted vehicle is also required to be small. In the MT type saddle-mounted vehicle (2), the number of times the engine is restarted when the clutch transitions to the disengaged state is limited to the number of restart upper limits or less. As a result, the MT type saddle-mounted vehicle of (2) can suppress the consumption of electric power due to the restart of the engine, so that a small battery can be adopted. Further, in the MT type saddle-mounted vehicle of (2), since the number of times the engine is restarted is limited, the wear of the clutch can be suppressed. That is, in the MT type saddle-mounted vehicle of (2), in the MT-type saddle-mounted vehicle that performs idling stop, a small battery is used to suppress clutch wear, and the operation for starting from the idling stop state is performed. The convenience can be further enhanced.

According to one aspect of the present invention, the MT type saddle-mounted vehicle can adopt the following configuration.
(3) The MT type saddle-mounted vehicle of (2).
The MT-type saddle-mounted vehicle includes a battery that supplies electric power to the starting generator.
The control device is configured to set the upper limit number of restarts according to the remaining amount of the battery.

In the MT type saddle-mounted vehicle of (3), the maximum number of restarts is limited according to the remaining battery level. As a result, the MT-type saddle-mounted vehicle of (3) can suppress power consumption due to repeated engine restarts. Therefore, in the MT type saddle-mounted vehicle of (3), a small battery can be adopted. Therefore, in the MT type saddle-mounted vehicle of (3), in the MT-type saddle-mounted vehicle that performs idling stop, the convenience of the operation for starting from the idling stop state can be further enhanced while reducing the size of the battery. ..

According to one aspect of the present invention, the MT type saddle-mounted vehicle can adopt the following configuration.
(4) An MT-type saddle-mounted vehicle according to any one of (1) to (3).
The control device stops the engine when the idling stop condition is satisfied, and starts the engine when the clutch shifts to the disengaged state when the engine is stopped due to the satisfaction of the idling stop condition. Until
The engine is not started regardless of whether the manual transmission is in the neutral state or the non-neutral state.

In the MT type saddle-mounted vehicle of (4), the control device stops the engine when the idling stop condition is satisfied, and starts the engine until the engine is started when the clutch transitions to the disengaged state. Not performed. In particular, the MT type saddle-mounted vehicle of (4) does not start the engine in the above-mentioned state regardless of whether the manual transmission is in the neutral state or the non-neutral state. As a result, the MT-type saddle-mounted vehicle of (4) can suppress changes in the behavior of the vehicle body during idling stop.

The terminology used herein is for the purpose of defining only specific embodiments and has no intention of limiting the invention. As used herein, the term "and / or" includes any or all combinations of one or more related listed components. As used herein, the use of the terms "including, including," "comprising," or "having," and variations thereof, is the feature, process, operation, described. It identifies the presence of elements, components and / or their equivalents, but can include one or more of steps, actions, elements, components, and / or groups thereof. As used herein, the terms "attached", "connected", "combined" and / or their equivalents are widely used, direct and indirect attachment, connection and Includes both bonds. Further, "connected" and "bonded" are not limited to physical or mechanical connections or bonds, but can include direct or indirect electrical connections or bonds. Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs. Terms such as those defined in commonly used dictionaries should be construed to have meaning consistent with the relevant technology and in the context of the present disclosure and are expressly defined herein. Unless it is done, it will not be interpreted in an ideal or overly formal sense. It is understood that a number of techniques and processes are disclosed in the description of the present invention. Each of these has its own interests and each can be used in conjunction with one or more of the other disclosed techniques or, in some cases, all. Therefore, for clarity, this description refrains from unnecessarily repeating all possible combinations of individual steps. Nevertheless, the specification and claims should be read with the understanding that all such combinations are within the scope of the present invention and claims.

This specification describes a new MT type saddle-mounted vehicle. In the following description, for purposes of illustration, a number of specific details are given to provide a complete understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without these specific details. The present disclosure should be considered as an example of the invention and is not intended to limit the invention to the particular embodiments set forth in the drawings or description below.

The MT type saddle-mounted vehicle is a saddle-mounted vehicle having a manual transmission. A saddle-type vehicle is a vehicle in which the driver sits across the saddle. Examples of the saddle-mounted vehicle include a moped type, an off-road type, and an on-road type motorcycle. Further, the saddle-mounted vehicle is not limited to the motorcycle, and may be, for example, a motorcycle, an ATV (All-Terrain Vehicle), or the like. The tricycle may have two front wheels and one rear wheel, or may have one front wheel and two rear wheels. The drive wheels of the saddle-mounted vehicle may be rear wheels or front wheels. Further, the drive wheels of the saddle-mounted vehicle may be both rear wheels and front wheels. Further, it is preferable that the saddle-mounted vehicle is configured to be able to turn in a lean posture. A saddle-mounted vehicle configured to be able to turn in a lean posture is configured to turn in a posture tilted toward the center of a curve. As a result, the saddle-mounted vehicle configured to be able to turn in a lean posture opposes the centrifugal force applied to the vehicle when turning. In a saddle-mounted vehicle that is configured to be able to turn in a lean posture, lightness is required, so the responsiveness of progress to the starting operation is important. In the MT type saddle-mounted vehicle, for example, a torque converter utilizing the mechanical action of the fluid is not provided in the power transmission path from the engine to the drive wheels.

The engine is, for example, an engine having a high load region and a low load region. The engine is, for example, a 4-stroke engine. The four-stroke engine has a high load region and a low load region during the four strokes. The 4-stroke engine having a high load region and a low load region is, for example, a single cylinder engine. The 4-stroke engine having a high load region and a low load region is, for example, a 2-cylinder engine, an unequal-interval combustion type 3-cylinder engine, or an unequal-interval combustion type 4-cylinder engine. A four-stroke engine having a high load region and a low load region includes a continuous non-combustion section of 180 degrees or more during one cycle of 720 degrees. The 4-stroke engine having a high load region and a low load region does not include, for example, an evenly spaced combustion type engine having 3 or more cylinders. A four-stroke engine is, for example, an engine having less than three cylinders. In one embodiment of the present disclosure, the 4-stroke engine is, for example, a single-cylinder engine or a two-cylinder engine. The two-cylinder engine may be a non-equidistant combustion engine having two cylinders. As an unequal-spaced combustion engine having two cylinders, for example, a V-type engine can be mentioned.
In a 4-stroke engine having a high load region and a low load region, the fluctuation of rotation at a low rotation speed is larger than that of other types of engines. The high load region is a region in which the load torque is higher than the average value of the load torque in one combustion cycle in one combustion cycle of the engine. The low load region refers to a region other than the high load region in one combustion cycle. Looking at the rotation angle of the crank shaft as a reference, the low load region in the engine is wider than, for example, the high load region. The compression stroke has an overlap with the high load region.

The idling stop function is a function to stop the engine by satisfying a predetermined idling stop. The idling stop condition is one of several operations performed when the driver has stopped or plans to stop the MT-type saddle-type vehicle and the state of the MT-type saddle-type vehicle due to these operations. Or a combination of multiple. As a predetermined idling stop condition, a condition other than turning off the engine key is set. Conventionally known conditions can be adopted as the idling stop condition. Further, as the above-mentioned operation and the above-mentioned state constituting the idling stop condition, conventionally known operations and states can be adopted, respectively.

The start generator functions as a start motor to start the engine. The starting generator is a motor generator that is driven by an engine to generate electricity. The starting generator is, for example, a permanent magnet type starting generator. The starting generator may be, for example, a starting generator that does not use a permanent magnet. The permanent magnet type starting generator is, for example, a brushless motor. A brushless motor is a motor that does not have a commutator. The starting generator is not limited to this. The permanent magnet type starting generator may be, for example, a brushed DC motor. The brushless motor may be, for example, an outer rotor type or an inner rotor type. Further, the brushless motor may be an axial gap type instead of the radial gap type. Further, the starting generator may be, for example, a type in which the rotor does not have a permanent magnet. The starting generator is interlocked with, for example, the crank shaft. The starting generator may be, for example, always connected to the crank shaft. Specifically, the starting generator is directly connected to the crank shaft without using a clutch such as a one-way clutch. However, the starting generator may be connected to the crank shaft via a gear or a belt.

The clutch is configured to operate in response to the driver's operation of the clutch lever. The clutch is a clutch that operates so as to change the state of connection or disconnection both when the vehicle starts and when the speed change is changed. Examples of the clutch include a wet or dry multi-plate or single-plate clutch. In one embodiment, the clutch is a wet multi-plate clutch. However, a centrifugal clutch that does not operate in response to an operation does not fall under the clutch of the present invention.

Power transmission path is a general term for mechanical elements in the path that transmits engine power from the crank shaft of the engine to the drive wheels. The power transmission path includes at least one of a drive shaft, a non-drive shaft, a drive gear, a driven gear, a chain sprocket, a chain, and a drive belt.

The manual transmission changes the gear ratio by the operation of the driver. The manual transmission is configured to change the gear ratio in multiple stages according to the operation of the shift pedal. The manual transmission has a plurality of gear stages including the neutral state. That is, the manual transmission can change the gear ratio in multiple stages including the neutral state. The manual transmission has, for example, a neutral state and a non-neutral state. The non-neutral state may include three or more 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 at a gear ratio according to the operation of the shift pedal and transmitted to the output shaft. Continuously variable transmissions do not fall under the category of manual transmissions.

The control device controls the combustion operation of the engine. In addition, the control device controls the drive of the generator motor and the power generation operation. In the control device, for example, a plurality of devices may be configured at positions separated from each other, or may be configured integrally. The control device may have a processor for executing a program, or may be an electronic circuit.
The following can be said about the processes (A) to (C) of the control device. The situation in which the manual transmission in the process (C) is in the non-neutral state may be started after the engine is started in the process (B), or may be started before the engine is started. Furthermore, the situation in which the manual transmission in the process (C) is in the non-neutral state may be started before the engine is stopped in the process (A).
Further, in the process (B), the situation in which the engine stalls due to the transition to the clutch connection state following the engine start means that the engine is in operation due to the start of the engine and that the engine is started. It is a situation that has not been driven yet.

The maximum number of restarts is, for example, a predetermined value. The upper limit of the number of restarts is not particularly limited, and may change depending on, for example, the state of charge of the battery.

According to the present invention, in the MT type saddle-mounted vehicle that performs idling stop, it is possible to provide an MT-type saddle-mounted vehicle that is more convenient to operate for starting from the idling stop state.

(A) is a left side view schematically showing the MT type saddle-mounted vehicle according to the first embodiment. (B) is a right side view schematically showing a part of the MT type saddle-mounted vehicle shown in FIG. (A). (C) is a flowchart showing the operation of the control device of the MT type saddle-mounted vehicle shown in (a). (D) is a left side view showing the configuration of an MT type four-wheeled vehicle which is a comparative example. (E) is an enlarged view showing the pedal portion of the MT type four-wheeled vehicle shown in (d). It is a figure which shows the structure of the MT type saddle riding type vehicle which concerns on 2nd Embodiment of this invention. (A) is a left side view schematically showing an MT type saddle-mounted vehicle. (B) is a right side view schematically showing a part of the MT type saddle-mounted vehicle. (C) is a flowchart showing the operation of the control device of the MT type saddle-mounted vehicle. It is a flowchart which shows the operation of the control device of the MT type saddle type vehicle which concerns on 3rd Embodiment of this invention. It is a flowchart which shows the operation of the control device of the MT type saddle type vehicle which concerns on 4th Embodiment of this invention.

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

[First Embodiment]
FIG. 1 is a diagram showing the configuration of the MT type saddle-mounted vehicle 1 according to the first embodiment of the present invention in comparison with a comparative example.
In the present specification and drawings, F indicates the front in the MT type saddle-mounted vehicle 1. B indicates the rear of the MT type saddle-mounted vehicle 1. U indicates the upper side in the MT type saddle riding type vehicle 1. D indicates the lower part in the MT type saddle-mounted vehicle 1.
FIG. 1A is a left side view schematically showing the MT type saddle-mounted vehicle 1. FIG. 1B is a right side view schematically showing a part of the MT type saddle-mounted vehicle 1. FIG. 1 (c) is a flowchart showing the operation of the control device of the MT type saddle-mounted vehicle 1. FIG. 1D is a left side view showing the configuration of the MT type four-wheeled vehicle 100 which is a comparative example. FIG. 1 (e) is an enlarged view showing a pedal portion of the MT type four-wheeled vehicle 100.

As shown in FIG. 1A, the MT type saddle-mounted vehicle 1 includes an engine 10, a drive wheel 21, a manual transmission 30, a clutch lever 36, a clutch 35, and a starting generator 40. Be prepared.
The engine 10 has a crank shaft 15. The engine 10 outputs the power generated by combustion via the rotating crank shaft 15.
The drive wheels 21 receive the power output from the engine 10 to drive the MT-type saddle-mounted vehicle 1.
The manual transmission 30 changes the gear ratio between the engine 10 and the drive wheels 21 in multiple stages including a neutral state and a non-neutral state according to the operation of the driver of the MT type saddle-mounted vehicle 1.
The clutch lever 36 receives the clutch operation of the clutch 35 of the driver of the MT type saddle-mounted vehicle 1.
The clutch 35 is provided in the power transmission path 31 between the engine 10 and the manual transmission 30. The clutch 35 interrupts and interrupts power transmission between the engine 10 and the manual transmission 30 in response to an operation on the clutch lever 36 by the driver.
The starting generator 40 is connected to the crank shaft 15 so that power is transmitted to and from the crank shaft 15 without a clutch. No clutch of any kind, including one-way clutches, is interposed between the starting generator 40 and the crank shaft 15. The start generator 40 starts the engine 10 by driving the crank shaft 15 when the engine 10 is started, and is driven by the crank shaft 15 to generate electricity during the combustion operation of the engine 10.
Further, the MT type saddle-mounted vehicle 1 includes an accelerator grip 16 as shown in FIG. 1 (b). The accelerator grip 16 receives the accelerator operation of the MT type saddle-mounted vehicle 1. Further, the MT type saddle-mounted vehicle 1 includes a brake pedal 22 as shown by a broken line portion in FIG. 1 (a). The brake pedal 22 receives a brake operation on the rear wheel (drive wheel 21) brake of the MT type saddle-mounted vehicle 1.

Further, the MT type saddle-mounted vehicle 1 includes 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 starting generator 40. The control device 51 controls the combustion of the engine 10 based on the received signal, and controls the operation of the start generator 40 via the driver 45.
The control device 51 is configured to perform the following processes (A) to (C). Here, the processes (A) to (C) are
(A) The process of stopping the engine 10 when the idling stop condition is satisfied, and
(B) When the engine 10 is stopped due to the process (A), the process of starting the engine 10 triggered by the transition to the disengaged state of the clutch 35 in response to the operation of the clutch lever 36 by the driver.
(C) Following the start of the engine 10 by the process (B), the clutch 35 is connected to the clutch 35 according to the operation of the clutch lever 36 by the driver under the condition that the manual transmission 30 is in the non-neutral state. This is a process of restarting the engine 10 when the engine 10 stalls due to the transition, triggered by the transition to the disengaged state of the clutch 35 in response to the operation of the clutch lever 36 by the driver.

The processes (A) to (C) are set as follows, as shown in FIG. 1 (c).
Processing (A)
When the control device 51 determines that the idling stop condition is satisfied in step S101, the control device 51 stops the combustion operation of the engine 10 in step S102.
Processing (B)
The process (B) is performed in a state where the combustion operation of the engine 10 is stopped in step S102. When the control device 51 receives a signal from the clutch lever position sensor 361 that the clutch 35 has transitioned to the disengaged state in step S103, the control device 51 causes the start generator 40 to start the engine 10 via the driver 45 in step S104.
Processing (C)
In the process (C), when the control device 51 detects the stall of the engine 10 in step S105 after starting the engine 10 in step S104, the engine 10 is started by the following steps S106 and S107.
The control device 51 determines that the engine 10 has stalled, for example, when the following conditions (i) to (iii) are satisfied. Here, the conditions of (i) to (iii) are as follows.
(I) The control device 51 receives a signal from the gear position sensor 301 to the effect that the manual transmission 30 is in the non-neutral state.
(Ii) The control device 51 receives a signal from the clutch lever position sensor 361 to the effect that the clutch 35 is in the connected state.
(Iii) The control device 51 receives a signal from the engine 10 to the effect that the combustion operation of the engine 10 has stopped.
The engine 10 outputs, for example, a signal to the effect that the combustion operation has stopped when the rotation of the crank shaft 15 has stopped. The signal to the effect that the combustion operation has stopped may be output by, for example, the start generator 40.
After determining that the engine 10 has stalled in step S105, when a signal indicating that the clutch 35 has transitioned to the disengaged state is received from the clutch lever position sensor 361 in step S106, the engine 10 is sent to the start generator 40 in step S107. Restart.

Next, the MT-type saddle-mounted vehicle 1 of the present embodiment will be described in comparison with the MT-type four-wheeled vehicle 100 that performs idling stop as shown in FIGS. 1 (d) and 1 (e). For example, in the MT type four-wheeled vehicle 100 that performs idling stop, a configuration is conceivable in which the engine 110 is started by depressing the clutch pedal 136 after the engine 110 is stopped by idling stop. In such an MT type four-wheeled vehicle 100, the starting operation is performed as follows. After the engine 110 is stopped by the idling stop, the driver depresses the clutch pedal 136 at the time of starting to start the engine 110. Next, the driver steps his right foot from the brake pedal 122 to the accelerator pedal 116 in order to increase the rotational speed of the engine 110. During this time, the driver's left foot is depressing the clutch pedal 136. Next, the driver operates the accelerator pedal 116 in the direction of depressing the accelerator pedal 116 and at the same time releasing the left foot from the clutch pedal 136 to create a half-clutch state. Therefore, there is a time lag between the start of the engine 110 in response to the depression of the clutch pedal 136 and the operation of the foot in the direction away from the clutch pedal 136. During this time lag, the rotational speed of the started engine 110 increases.

On the other hand, the driver of the MT type saddle-mounted vehicle 1 can operate the accelerator grip 16, the clutch lever 36, and the brake pedal 22 for a short time or at the same time. Therefore, the MT type saddle-mounted vehicle 1 that performs idling stop may have a small time lag from the start of the engine 10 to the engagement of the clutch 35. That is, the driver of the MT-type saddle-mounted vehicle 1 may operate the clutch 35 in a short time after the engine 10 is started. Further, since the MT type saddle-mounted vehicle 1 is small and lightweight, the inertia of the crank shaft 15 of the engine 10 is small. Therefore, the engine 10 may stall.

In addition, when the engine is started in an MT type saddle-mounted vehicle in which the starter motor is installed separately from the generator, the starter motor drives the crank shaft via a power transmission member such as a one-way clutch or a gear. Therefore, such an MT type saddle-mounted vehicle produces an operating noise of a one-way clutch, a gear, or the like when the engine is started. On the other hand, in the MT type saddle-mounted vehicle 1 having the starting generator 40, power is transmitted from the starting generator 40 to the crank shaft 15 without going through the one-way clutch. Therefore, the MT-type saddle-mounted vehicle 1 having the starting generator 40 has a smaller start noise than the MT-type saddle-mounted vehicle in which the starter motor is provided separately from the generator. Therefore, it is difficult for the driver to recognize the starting state of the engine 10. In this case, the driver may connect the clutch 35 immediately after the start of the engine 10 without recognizing the start state of the engine 10. Therefore, in the MT type saddle-mounted vehicle 1 having the starting generator 40, the engine 10 may stall in the operation at the time of starting.

In the MT type saddle-mounted vehicle 1 of the present embodiment, after the engine 10 stalls due to the driver's starting operation after idling stop, the engine 10 is started by an operation of grasping the clutch lever 36 to disengage the clutch 35. Can be made to. That is, in the MT type saddle-mounted vehicle 1, even if the engine 10 stalls due to the operation at the time of starting after the engine 10 stopped by the idling stop is started, the engine 10 can be restarted by the operation of grasping the clutch lever 36. .. Further, in the MT type saddle-mounted vehicle 1, the engine 10 stalls when the clutch lever 36 is released. Therefore, the engine 10 can be restarted by the operation of grasping the clutch lever 36, which was the target of the release operation, and returning it to the previous state. Therefore, in the MT type saddle-mounted vehicle 1, if the engine 10 stalls when the start operation is performed after the engine 10 stopped by the idling stop is started, the operation for restarting the engine 10 should be simplified. Can be done. Thereby, according to the present embodiment, in the MT type saddle-mounted vehicle 1 that performs idling stop, the convenience of the operation for starting from the idling stop state can be further enhanced.

[Second Embodiment]
A second embodiment of the present invention will be described. FIG. 2 is a diagram showing a configuration of an MT type saddle-mounted vehicle 2 according to a second embodiment of the present invention. Here, FIG. 2A is a left side view schematically showing the MT type saddle-mounted vehicle 2. FIG. 2B is a right side view schematically showing a part of the MT type saddle-mounted vehicle 2. FIG. 2C is a flowchart showing the operation of the control device 52 of the MT type saddle-mounted vehicle 2. In this embodiment, the control device 52 is configured to perform the operation shown in FIG. 2 (c). In the present embodiment, the same configuration as that of the first embodiment is designated by the same reference numerals as the MT type saddle-mounted vehicle 1 shown in FIG.

The MT type saddle-mounted vehicle 2 of the present embodiment includes a battery 42 that supplies electric power to the starting generator 40. The control device 52 of the MT type saddle-mounted vehicle 2 of the present embodiment limits the number of times the engine 10 is restarted when the clutch 35 is changed to the disengaged state to the number of times of the upper limit of restarting or less. The control device 52 counts the number of times N of the process (C) of the first embodiment, that is, the restart triggered by the operation of the clutch 35. When it is determined that the number of times the process (C) has been performed exceeds the upper limit number of restarts Nmax, the control device 52 stops the process of restarting the engine 10 triggered by the operation of the clutch 35. At this time, if the engine 10 stalls, the engine 10 is started by the starter switch 41 (see FIG. 2B). Further, the engine 10 may be started by a kick starter (not shown).

Specifically, as shown in FIG. 2 (c), the control device 52 performs the processes (A) to the processes (C) (steps S101 to 107) in the same manner as in the first embodiment, and then in step S201. The number of times N when the engine 10 is restarted is counted. Next, in step S202, it is determined whether the engine restart number N exceeds the restart upper limit number Nmax (N> Nmax). When the control device 52 determines in step S202 that the engine restart count N exceeds the restart upper limit count Nmax, the engine 10 is restarted by a method other than the transition to the disengaged state of the clutch 35. For example, in the present embodiment, in step S203, when the control device 52 receives the ON signal of the starter switch 41 by the driver, in step S204, the engine 10 is restarted by the start generator 40. If the control device 52 determines in step S202 that the engine restart count N does not exceed the restart upper limit count Nmax, the operation returns to step S105.

Since the MT type saddle-mounted vehicle 2 is required to be small and lightweight, the battery 42 mounted on the MT-type saddle-mounted vehicle 2 is also required to be small. In the MT type saddle-mounted vehicle 2 of the present embodiment, the number of times the engine 10 is restarted when the clutch 35 transitions to the disengaged state is limited to the maximum number of restarts Nmax set as the number of times of two or more times. To. As a result, the MT type saddle-mounted vehicle 2 can suppress the consumption of electric power due to the restart of the engine 10, so that a small battery 42 can be adopted. Further, in the MT type saddle-mounted vehicle 2, the number of times the engine 10 is restarted due to the clutch operation is limited, so that the wear of the clutch 35 can be suppressed. That is, according to the MT type saddle-mounted vehicle 2 of the present embodiment, in a vehicle that performs idling stop, a small battery is adopted to suppress clutch wear, and the convenience of operation for starting from the idling stop state is convenient. Can be further enhanced.

[Third Embodiment]
A second 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 saddle-mounted vehicle 3 according to the third embodiment of the present invention. In this embodiment, the control device 53 is configured to perform the operation shown in FIG. In the present embodiment, the same configuration as that of the first embodiment is designated by the same reference numerals as those of the MT type saddle-mounted vehicle shown in FIGS. 1 and 2.

The control device 53 of the MT type saddle-mounted vehicle 3 of the present embodiment is configured to set the upper limit number of restarts according to the remaining amount of the battery. After the process (C) of the first embodiment, the control device 53 measures the remaining battery level of the battery 42, for example, in the present embodiment, the state of charge (State of Charge, hereinafter SOC) of the battery 42. The control device 53 sets the upper limit number of restarts Nmax of the engine 10 according to the measured SOC of the battery 42. In the present embodiment, the upper limit number of restarts Nmax is set to a value equal to or less than the number of times that the starting generator 40 can start the engine 10 by, for example, the battery stored power at the time of measurement. If the engine 10 stalls when the number of restarts triggered by the operation of the clutch 35 exceeds the restart upper limit Nmax, the engine 10 is started by the starter switch 41 or a kick starter (not shown).

Specifically, as shown in FIG. 3, the control device 53 performs the processes (A) to the processes (C) (steps S101 to 107) in the same manner as in the first embodiment, and then in step S301, the SOC of the battery 42 is To measure. The control device 53 sets the upper limit number of restarts Nmax in step S302 according to the SOC of the battery 42 acquired in step S301. The control device 53 counts the number of times N of restarting the engine 10 in step S201. Next, in step S202, it is determined whether the engine restart number N exceeds the restart upper limit number Nmax (N> Nmax). When the control device 53 determines in step S202 that the engine restart count N exceeds the restart upper limit count Nmax, the engine 10 is restarted by a method other than the transition to the disengaged state of the clutch 35. For example, in the present embodiment, in step S203, when the control device 53 receives the ON signal of the starter switch 41 by the driver, in step S204, the engine 10 is restarted by the start generator 40. If the control device 53 determines in step S202 that the engine restart count N does not exceed the restart upper limit count Nmax, the operation returns to step S105.

In the MT type saddle-mounted vehicle 3 of the present embodiment, the maximum number of restarts of the engine 10 is limited according to the remaining amount of the battery 42. As a result, the MT-type saddle-mounted vehicle 3 can suppress power consumption due to repeated restarts of the engine 10. Therefore, in the MT type saddle-mounted vehicle 3, a small battery can be adopted as the battery 42. Therefore, in the MT-type saddle-mounted vehicle 3 of the present embodiment, in the MT-type saddle-mounted vehicle that performs idling stop, the battery 42 is downsized and the convenience of operation for starting from the idling stop state is further enhanced. Can be done.

[Fourth Embodiment]
A 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 saddle-mounted vehicle 4 according to the fourth embodiment of the present invention. In this embodiment, the control device 54 is configured to perform the operation shown in FIG. The elements other than the control device 54 of the present embodiment have the same configuration as those of the first to third embodiments.

The control device 54 of the MT type saddle-mounted vehicle 4 of the present embodiment stops the engine 10 when the idling stop condition is satisfied (step S101). The control device of the engine 10 until the engine 10 is started (for example, steps S102 and S103) when the clutch 35 transitions to the disengaged state when the engine 10 is stopped due to the satisfaction of the idling stop condition. Do not start. That is, the control device 54 prohibits the start of the engine 10 after stopping the combustion operation of the engine 10 in step S102 (step S102-2). At this time, the control device 54 does not start the engine 10 regardless of whether the manual transmission 30 is in the neutral state or the non-neutral state. As a result, the MT type saddle-mounted vehicle 4 of the present embodiment can suppress changes in the behavior of the vehicle body during idling stop. The condition for releasing the prohibition is that the clutch 35 transitions to the disengaged state. That is, after step S102-2, when a signal indicating that the clutch 35 has transitioned to the disengaged state is received from the clutch lever position sensor 361 in step S103, the prohibition of starting the engine 10 is released in step S103-2. ..

1 to 4 MT type saddle-mounted vehicle 10 Engine 15 Crank shaft 21 Drive wheel 30 Manual transmission 31 Power transmission path 35 Clutch 36 Clutch lever 40 Starting generator 51 to 54 Control device

Claims

MT type saddle type vehicle,
An engine that has a crank shaft and outputs the power generated by combustion via the rotating crank shaft.
The drive wheels that receive the power output from the engine and drive the MT type saddle-type vehicle,
A manual transmission that changes the gear ratio between the engine and the drive wheels in multiple stages including a neutral state and a non-neutral state according to the driver's operation.
The clutch lever that receives the driver's clutch operation and
A clutch provided in the power transmission path between the engine and the manual transmission to interrupt the power transmission between the engine and the manual transmission in response to the driver's operation on the clutch lever. ,
It is connected to the crank shaft so that power is transmitted to and from the crank shaft without a clutch, and the engine is started by driving the crank shaft when the engine is started. A starting generator driven by the crank shaft to generate power,
The following processes (A) to (C) are configured to be performed, and the processes (A) to (C) are
(A) The process of stopping the engine when the idling stop condition is satisfied, and
(B) When the engine is stopped by the process (A), the process of starting the engine triggered by the transition to the disengaged state of the clutch in response to the operation of the driver to the clutch lever. ,
(C) Following the start of the engine by the process (B), the clutch connection state according to the operation of the clutch lever by the driver under the situation where the manual transmission is in the non-neutral state. When the engine stalls due to the transition to, the process of restarting the engine triggered by the transition to the disengaged state of the clutch in response to the operation of the driver to the clutch lever. It is equipped with a control device.
The MT type saddle-mounted vehicle according to claim 1.
The control device limits the number of times the engine is restarted triggered by the transition of the clutch to the disengaged state to the number of times of the upper limit of restarting or less.
The MT type saddle-mounted vehicle according to claim 2.
The MT-type saddle-mounted vehicle includes a battery that supplies electric power to the starting generator.
The control device is configured to set the upper limit number of restarts according to the remaining amount of the battery.
An MT type saddle-mounted vehicle according to any one of claims 1 to 3.
The control device stops the engine when the idling stop condition is satisfied, and starts the engine when the clutch shifts to the disengaged state when the engine is stopped due to the satisfaction of the idling stop condition. Until
The engine is not started regardless of whether the manual transmission is in the neutral state or the non-neutral state.