JP2023093818A - Brake system of saddle-riding type vehicle and saddle-riding type vehicle - Google Patents

Abstract

To provide a brake system of a saddle-riding type vehicle which can brake a wheel in the vehicle stop state.SOLUTION: In a brake system, a mechanism unit comprises: a friction application device which brakes a wheel of a saddle-riding type vehicle with friction force corresponding to movement of an operator; an operator movement sensor which detects the movement of the operator; and an actuator which is unitized together with the friction application device. In a time of regular brake, a control unit changes the friction force applied to the wheel by the friction application device by controlling an output of the actuator on the basis of the detection result of the operator movement sensor, and the control unit (62) causes the friction application device to apply the friction force to the wheel during the vehicle stop state where the saddle-riding type vehicle (100) is stopped.SELECTED DRAWING: Figure 7

Description

The present invention relates to a braking system for a saddle-riding vehicle with at least one operator operated by the rider, and to a saddle-riding vehicle equipped with such a braking system.

Braking systems for saddle-type vehicles are known that include at least one operator (eg, brake pedal, brake lever, etc.) operated by the rider. The brake system includes a mechanical section that includes a friction applying device that brakes the wheel with at least a frictional force corresponding to the motion of the operator. The mechanical portion includes a master cylinder to which motion of the operator is transmitted, and a wheel cylinder communicating with the master cylinder through a fluid passage filled with brake fluid.

JP 2014-15077 A

In the brake system configured as in Patent Document 1, it is difficult to maintain the hydraulic pressure of the brake fluid in the wheel cylinder at a relatively high level that generates a braking force when the operator is not operated by the rider. , and the wheels cannot be braked when the vehicle is stopped or parked when the operator is not operated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a braking system for a straddle-type vehicle that can brake the wheels while the vehicle is stopped.

A brake system according to the present invention is a brake system for a saddle-ride type vehicle, which includes at least one operator operated by a rider, wherein the saddle-ride type vehicle is braked by a frictional force corresponding to at least the movement of the operator. A mechanical section including a friction applying device for braking wheels of a vehicle is provided, and the mechanical section further includes an operator motion sensor for detecting the movement of the operator, and an actuator unitized with the friction applying device. and, furthermore, during normal braking, the output of the actuator is controlled based on the detection result of the operation element motion sensor to change the friction force applied to the wheel by the friction applying device. The control unit causes the friction applying device to apply the frictional force to the wheels when the straddle-type vehicle is in a stopped state.

A straddle-type vehicle according to the present invention includes the brake system described above.

In the brake system according to the present invention, the mechanism includes a friction applying device that brakes the wheels of a straddle-type vehicle with a frictional force corresponding to the movement of the operator, an operator motion sensor that detects the movement of the operator, and a friction and an actuator unitized with the applying device, and during normal braking, the control unit controls the output of the actuator based on the detection result of the operator motion sensor, and the friction applying device applies the force to the wheel. change the frictional force Then, when the straddle-type vehicle is in a stopped state, the control unit applies frictional force to the wheels by the friction applying device. Therefore, when the straddle-type vehicle is in a stopped state, it is possible to use the service brake to apply frictional force to the wheels for braking.

1 is a diagram showing the configuration of a straddle-type vehicle equipped with a brake system according to an embodiment of the present invention; FIG. It is a figure showing composition of a brake system concerning an embodiment of the invention. It is a figure showing composition of a fluid pressure adjustment unit of a brake system concerning an embodiment of the invention. It is a figure which shows the principal part structure of the 2nd mechanism part of the brake system which concerns on embodiment of this invention. It is a figure showing the system configuration of the brake system concerning an embodiment of the invention. It is a figure which shows the modification of a structure of the brake system which concerns on embodiment of this invention. It is a figure which shows the flow of parking-brake control of the brake system which concerns on embodiment of this invention.

The present invention will be described below with reference to the drawings.
Although a case where the braking system according to the present invention is applied to a motorcycle will be described below, the braking system according to the present invention may be applied to straddle-type vehicles other than motorcycles. A straddle-type vehicle means a vehicle in general that a rider rides on. Straddle-type vehicles include motorcycles (motorcycles and tricycles), buggies, and bicycles. Motorcycles include motorcycles or tricycles that use an engine as a propulsion source, and motorcycles or tricycles that use an electric motor as a propulsion source, such as motorcycles, scooters, and electric scooters. In addition, a bicycle generally means a vehicle that can be propelled on a road by a rider's stepping force applied to pedals. Bicycles include ordinary bicycles, electrically assisted bicycles, electric bicycles, and the like.

Further, hereinafter, the first mechanism portion, which is the mechanism portion for braking the front wheels, is hydraulically connected to the first operator, which is the operation member for braking the front wheels, and the mechanism for braking the rear wheels. the second mechanism unit is communicatively connected to the second operator for braking the rear wheel (that is, includes an actuator unitized with the friction applying device) However, the first mechanism may be communicatively connected to the first operator, the second mechanism may be hydraulically connected to the second operator, and the first mechanism may be It may be communicatively connected to the first operator, and the second mechanism may be communicatively connected to the second operator.

Further, in the following description, when the mechanical section is hydraulically connected to the operator, the mechanical section includes a hydraulic pressure adjusting unit, and the hydraulic pressure of the brake fluid in the wheel cylinder is adjusted using the pump of the hydraulic pressure adjusting unit. However, the hydraulic pressure of the brake fluid in the wheel cylinders may be reduced using a pumpless hydraulic pressure regulating unit.

Further, in the following description, both the first mechanism portion and the second mechanism portion include only one friction imparting device. It may also include an applicator. Further, the plurality of friction applying devices provided in each mechanism may apply frictional force in response to input to the same operator, or may apply frictional force in response to input to different operators. It may be one that imparts a frictional force.

Also, the configurations, operations, etc., described below are merely examples, and the brake system according to the present invention is not limited to such configurations, operations, and the like. In addition, detailed structures are simplified or omitted as appropriate. Also, overlapping or similar descriptions may be appropriately simplified or omitted.

Embodiment.
A brake system according to an embodiment will be described below.

<Configuration and operation of brake system>
The configuration and operation of the brake system according to the embodiment will be described with reference to FIGS. 1 to 7. FIG.

FIG. 1 is a diagram showing the configuration of a straddle-type vehicle equipped with a brake system according to an embodiment of the invention. FIG. 2 is a diagram showing the configuration of the brake system according to the embodiment of the invention. FIG. 3 is a diagram showing the configuration of the hydraulic pressure adjustment unit of the brake system according to the embodiment of the invention. FIG. 4 is a diagram showing the main configuration of the second mechanism section of the brake system according to the embodiment of the present invention. FIG. 5 is a diagram showing the system configuration of the brake system according to the embodiment of the invention. FIG. 6 is a diagram showing a modification of the configuration of the brake system according to the embodiment of the invention. FIG. 7 is a diagram showing the flow of parking brake control of the brake system according to the embodiment of the present invention.

As particularly shown in FIGS. 1 and 2, the brake system 10 is mounted on a straddle-type vehicle 100. As shown in FIG. A straddle-type vehicle 100 includes a body 1, a handle 2 rotatably held by the body 1, a front wheel 3 rotatably held by the body 1 together with the handle 2, and a handle 2 rotatably held by the body 1. and a rear wheel 4 that is mounted. The rear wheels 4 correspond to "wheels" in the present invention. The front wheel 3 corresponds to "another wheel" in the present invention.

The brake system 10 includes a first operator 11 and a second operator 12 operated by the rider. The first manipulator 11 is configured, for example, as a brake lever provided on the handle 2 and is operated by a user's hand. The second operator 12 is configured, for example, as a brake pedal provided in the lower part of the body 1 and operated by the foot of the user. The second manipulator 12 corresponds to the "manipulator" in the present invention.

The brake system 10 includes a first mechanism portion 20 hydraulically connected to the first operator 11 and a second mechanism portion 40 communicatively connected to the second operator 12 . The first mechanism unit 20 presses the friction material (not shown) of the first friction applying device 21 held on the body 1 against the disk rotor 3a that rotates together with the front wheel 3, thereby operating the first operator 11. The front wheels 3 are braked with a frictional force corresponding to the amount. The second mechanism unit 40 presses a later-described friction material 51 of a second friction imparting device 50 held on the body 1 against the disk rotor 4a that rotates together with the rear wheel 4, thereby causing the second operator 12 to move. It brakes the rear wheel 4 with a frictional force corresponding to the amount of operation. Note that the first friction applying device 21 and the second friction applying device 50 may have other structures. For example, the first friction applying device 21 presses the friction material of the brake shoe held on the body 1 against the brake drum that rotates together with the front wheel 3, and the friction force corresponding to the operation amount of the first operator 11 is applied. may be caused. In addition, the second friction applying device 50 presses the friction material of the brake shoe held on the body 1 against the brake drum that rotates together with the rear wheel 4 to generate friction corresponding to the amount of operation of the second operator 12. It may be something that produces force. The second mechanical section 40 corresponds to the "mechanical section" in the present invention. The second friction applying device 50 corresponds to the "friction applying device" in the present invention.

The first mechanism portion 20 includes a master cylinder 22 to which the motion of the first manipulator 11 is transmitted, a reservoir 23 attached to the master cylinder 22, and a fluid passage 24 filled with brake fluid. , a wheel cylinder 25 built in the first friction applying device 21, a brake fluid pipe 24a constituting part of the fluid path 24, one end of which is connected to the master cylinder 22, and a part of the fluid path 24 and includes a brake fluid pipe 24b having one end connected to the wheel cylinder 25, and a fluid pressure adjusting unit 30 connected to the other ends of the brake fluid pipe 24a and the brake fluid pipe 24b. The hydraulic pressure adjusting unit 30 may be directly connected to the master cylinder 22 without using the brake fluid pipe 24a, or the hydraulic pressure adjusting unit 30 may be directly connected to the wheel cylinder without using the brake fluid pipe 24b. 25 may be directly connected. Also, the hydraulic pressure adjustment unit 30 may be unitized together with the master cylinder 22 or the wheel cylinder 25 .

As particularly shown in FIGS. 2 and 3, the hydraulic pressure adjustment unit 30 includes a base 31. As shown in FIG. The base body 31 includes a master cylinder port MP to which the brake fluid pipe 24a is connected, a wheel cylinder port WP to which the brake fluid pipe 24b is connected, and a part of the fluid passage 24. The master cylinder port MP and the wheel cylinder A main liquid passage 24c, which is an internal liquid passage connecting to the port WP, and a sub liquid passage 24d, which constitutes a part of the liquid passage 24 and bypasses the main liquid passage 24c, are formed. ing. The brake fluid in the wheel cylinder 25 is released to the middle portion of the main fluid passage 24c through the secondary fluid passage 24d.

A filling valve 32 is provided in the main liquid passage 24c. The auxiliary fluid passage 24d is provided with a release valve 33, an accumulator 34 for storing brake fluid, and a pump 35 in this order from the upstream side. Pump 35 is driven by motor 36 . A charge valve 32 , a release valve 33 , an accumulator 34 , a pump 35 and a motor 36 are assembled to the base 31 . A housing 37 for accommodating at least part of a control unit (ECU) 60 is attached to the base 31 . The inlet valve 32 is, for example, an electromagnetic valve that switches the flow of the brake fluid at its installation location from open to closed when it is switched from a non-energized state to an energized state. The release valve 32 is, for example, an electromagnetic valve that switches the flow of the brake fluid toward the pump 35 from closed to open when it is switched from a de-energized state to an energized state.

As particularly shown in FIGS. 2 and 4 , the second mechanism section 40 includes an actuator 41 unitized with the second friction applying device 50 . The actuator 41 may be attached to the outside of the second friction applying device 50 or may be built in the second friction applying device 50 . The second friction imparting device 50 is configured as a floating caliper. The second friction imparting device 50 may have other structures. For example, the second friction applying device 50 may be configured as an opposed caliper. The second friction applying device 50 includes a pair of friction materials 51 sandwiching the disk rotor 4a, and a spindle 52 for adjusting the distance of the friction material 51 from the disk rotor 4a. Actuator 41 is connected to spindle 52 and causes spindle 52 to translate for adjustment of its distance. Actuator 41 is, for example, a motor. The rectilinear motion of the spindle 52 may be transmitted to the friction material 51 via an elastic member, or may be transmitted to the friction material 51 via fluid such as hydraulic fluid.

Here, the spindle 52 is urged in a direction in which the distance from the disk rotor 4a is reduced by an urging member (not shown) such as a spring built in the second friction applying device 50 or the actuator 41 . Therefore, when the actuator 41 is not energized, that is, when there is no output from the actuator 41, the spindle 52 is pushed out by its biasing force, and the friction material 51 of the second friction applying device 50 is pressed against the disk rotor 4a. and the rear wheels 4 are braked. The biasing force should be sufficient to stop the straddle-type vehicle 100 . When the actuator 41 is energized, as the output of the actuator 41 increases, the spindle 52 is returned against the urging force thereof, and the friction material 51 of the second friction applying device 50 is pushed back to the disc rotor. away from 4a. That is, when the actuator 41 is not energized, the second friction applying device 50 applies friction force to the rear wheel 4, and when the actuator 41 is energized, the friction force is applied to the rear wheel 4 by the second friction applying device 50. The applied frictional force decreases as the output of the actuator 41 increases. The output of the actuator 41 means the force that the actuator 41 applies to the mechanical element (here, the spindle 52) that performs physical motion.

In particular, as shown in FIGS. 2 and 5, the control device 60 includes a first control unit 61 that controls the operation of the charging valve 32, the release valve 33, and the motor 36, and a second control unit that controls the operation of the actuator 41. a portion 62; Each of the first control section 61 and the second control section 62 may be integrated into one or may be divided into a plurality of sections. A part or all of each of the first control unit 61 and the second control unit 62 may be configured by, for example, a microcomputer, a microprocessor unit, or the like, or may be configured by an updatable device such as firmware. Alternatively, it may be a program module or the like executed by a command from a CPU or the like. The second control section 62 corresponds to the "control section" of the present invention. The first control section 61 corresponds to "another control section" in the present invention.

The control device 60 includes, for example, a front wheel rotation speed sensor 81 , a brake fluid pressure sensor 82 , a road surface gradient sensor 83 , an engine ON sensor 84 , a rear wheel rotation speed sensor 91 , a second operator motion sensor 92 , a friction material motion sensor 93 . The output signal such as is transmitted by wire or wirelessly. Output signals of other sensors may be transmitted to the control device 60 . The control device 60 derives the target braking force to be generated at the front wheels 3 and the rear wheels 4 based on those output signals. The first control unit 61 transmits a command signal according to the target braking force to be generated in the front wheel 3 to the charging valve 32, the releasing valve 33, and the driver of the motor 36 by wire or wirelessly. The second control unit 62 also transmits a command signal corresponding to the target braking force to be generated in the rear wheels 4 to the driver of the actuator 41 by wire or wirelessly. The second manipulator motion sensor 92 corresponds to the "manipulator motion sensor" of the present invention.

A front wheel rotation speed sensor 81 detects the rotation speed of the front wheels 3 . The front wheel rotation speed sensor 81 is held by the body 1, for example. The front wheel rotation speed sensor 81 may detect another physical quantity substantially convertible to the rotation speed of the front wheels 3 .

The brake fluid pressure sensor 82 detects the fluid pressure of the brake fluid in the wheel cylinder 25, for example. The brake fluid pressure sensor 82 is provided, for example, in a region closer to the wheel cylinder 25 than the filling valve 32 in the main fluid passage 24c. The brake fluid pressure sensor 82 may detect another physical quantity substantially convertible to the fluid pressure of the brake fluid in the wheel cylinder 25 .

The road surface gradient sensor 83 detects the gradient of the road surface on which the straddle-type vehicle 100 is running or stopped. The road surface gradient sensor 83 is held by the fuselage 1, for example. The road surface gradient sensor 83 may detect other physical quantities substantially convertible to the road surface gradient.

The engine ON sensor 84 detects an ON state in which the engine of the straddle-type vehicle 100 is operating. The engine ON sensor 84 is held by the fuselage 1, for example. The engine ON sensor 84 may detect another physical quantity that can be substantially converted to the operating state of the engine of the straddle-type vehicle 100 .

A rear wheel rotation speed sensor 91 detects the rotation speed of the rear wheel 4 . The rear wheel rotation speed sensor 91 is held by the body 1, for example. The rear wheel rotation speed sensor 91 may detect another physical quantity that can be substantially converted into the rotation speed of the rear wheel 4 .

The second manipulator motion sensor 92 detects the movement of the second manipulator 12 . The second manipulator motion sensor 92 may be of any type as long as it detects a physical quantity reflecting the braking force desired by the rider. For example, the second manipulator motion sensor 92 may detect the amount of manipulation of the second manipulator 12 by the rider, or detect the force applied to the second manipulator 12 by the rider. may be The second manipulator motion sensor 92 is held by the body 1, for example. The second manipulator motion sensor 92 may detect another physical quantity substantially convertible to the amount of manipulation of the second manipulator 12 or the force applied to the second manipulator 12 .

The friction material movement sensor 93 detects movement of the friction material 51 of the second friction applying device 50 . The friction material motion sensor 93 may be of any type as long as it detects a physical quantity reflecting the braking force generated on the rear wheel 4 by the second friction applying device 50 . For example, the friction material motion sensor 93 may detect the drive amount of the actuator 41 or may detect the reaction force acting on the spindle 52 . The friction material motion sensor 93 is held by the second friction applying device 50, for example. The friction material motion sensor 93 may detect another physical quantity that can be substantially converted into the drive amount of the actuator 41 or the reaction force acting on the spindle 52 .

The first control section 61 and the second control section 62 are accommodated within the housing 37 of the hydraulic pressure adjustment unit 30 . That is, the first control section 61 and the second control section 62 are unitized together with the charging valve 32 , the releasing valve 33 and the motor 36 . The second control section 62 may be unitized together with the second friction applying device 50 and the actuator 41 , or may be unitized together with the second manipulator motion sensor 92 .

When the saddle-ride type vehicle 100 is stopped or the saddle-ride type vehicle 100 is running with the front wheels 3 and the rear wheels 4 not slipping exceeding the reference value, the rider presses the first operator. 11, that is, at the time of the service brake (so-called service brake) of the first mechanism unit 20, the first control unit 61 controls the charging valve 32 and the loosening valve 33 to be in a non-energized state, and the motor 36 to the non-driving state. When the rider operates the first manipulator 11, the piston (not shown) of the master cylinder 22 is pushed in, the fluid pressure of the brake fluid in the wheel cylinder 25 increases, and the friction material of the first friction applying device 21 moves to the disk rotor 3a. , the front wheels 3 are braked. Also, when the rider releases the first operator 11, the piston of the master cylinder 22 is returned, the hydraulic pressure of the brake fluid in the wheel cylinder 25 is reduced, and the friction material of the first friction applying device 21 is separated from the disc rotor 3a. be That is, in the first mechanism portion 20, the frictional force applied to the front wheels 3 by the first friction applying device 21 changes according to the hydraulic pressure of the brake fluid in the master cylinder 22 during normal braking. When the rider operates the first manipulator 11, in addition to applying the frictional force to the front wheel 3 by the first friction applying device 21, the second friction applying device 50 applies the frictional force to the rear wheel 4. may be executed.

In a state in which the rider does not operate the second operator 12, that is, in a state in which the second friction applying device 50 does not need to brake the rear wheel 4, the second control unit 62 increases the output of the actuator 41 to the upper limit. Let Then, while the straddle-type vehicle 100 is stopped, or the straddle-type vehicle 100 is running in a state where the front wheels 3 and the rear wheels 4 do not slip in excess of the reference value, the rider receives the second When the manipulator 12 is operated, that is, when the second mechanism section 40 is under normal braking, the second control section 62 drives the actuator 41 by a driving amount according to the output signal of the second manipulator motion sensor 92 . When the rider operates the second manipulator 12, the second control unit 62 reduces the output of the actuator 41, thereby pushing out the spindle 52 and pressing the friction material 51 of the second friction applying device 50 against the disk rotor 4a. , the rear wheel 4 is braked. When the rider releases the second manipulator 12, the second control unit 62 increases the output of the actuator 41 to return the spindle 52, and the friction material 51 of the second friction applying device 50 moves from the disk rotor 4a. released. That is, in the second mechanism section 40, the frictional force applied to the rear wheel 4 by the second friction applying device 50 during normal braking is detected by the second control section 62 as a result of detection by the second operating element motion sensor 92. It changes by controlling the output of the actuator 41 based on. When the rider operates the second operator 12, in addition to applying the frictional force to the rear wheel 4 by the second friction applying device 50, the first friction applying device 21 applies the frictional force to the front wheel 3. may be executed.

The stopping of the straddle-type vehicle 100 and the slippage occurring in the front wheels 3 and the rear wheels 4 can be determined by a well-known method using the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 .

When the straddle-type vehicle 100 is running with the front wheels 3 or the rear wheels 4 slipping in excess of the reference value, the control device 60 performs a slip control operation to suppress the slipping. The slip control operation includes, for example, an operation for performing antilock brake control for each wheel, an operation for performing idling suppression control for each wheel, and an operation for performing sideslip suppression control for each wheel. The control device 60 may control other systems mounted on the straddle-type vehicle 100 in addition to the brake system 10 when executing the slip control operation.

During execution of the slip control operation, in a state where it is necessary to reduce the frictional force applied to the front wheels 3, the first control unit 61 controls the charging valve 32 and the releasing valve 33 to be energized, and The motor 36 is driven by a drive amount according to the output signal of the brake fluid pressure sensor 82 . Such control reduces the hydraulic pressure of the brake fluid in the wheel cylinder 25 and separates the friction material of the first friction imparting device 21 from the disc rotor 3a. That is, in the first mechanism unit 20, when the slip control operation is executed, the frictional force applied to the front wheel 3 by the first friction applying device 21 is controlled by the inlet valve 32, the release valve 33, and the And it changes according to the control of the motor 36 .

When the frictional force applied to the rear wheel 4 needs to be reduced during execution of the slip control operation, the second control unit 62 drives the actuator 41 by a drive amount corresponding to the output signal of the friction material motion sensor 93. drive the The second control unit 62 increases the output of the actuator 41 to return the spindle 52 and separate the friction material 51 of the second friction applying device 50 from the disk rotor 4a. That is, in the second mechanism unit 40 , when the slip control operation is executed, the frictional force applied to the rear wheel 4 by the second friction applying device 50 is controlled by the second control unit 62 to control the output of the actuator 41 . change depending on

The brake system 10 may be configured to reduce and increase the frictional force applied to the front wheels 3 during execution of the slip control operation. That is, as shown in FIG. 6, one end of the base 31 of the hydraulic pressure adjusting unit 30 is connected to the master cylinder 22 side of the confluence with the downstream end of the sub-fluid passage 24d of the main fluid passage 24c. A pressure-increasing fluid passage 24e, which is an internal fluid passage whose end is connected between the accumulator 34 and the pump 35 of the sub fluid passage 24d, may be formed. A switching valve 38 is provided between the junction of the main fluid passage 24c with the pressure boosting fluid passage 24e and the junction of the downstream end of the sub fluid passage 24d, and the pressure boosting fluid passage 24e is provided with a pressure boosting valve 39. be done. The switching valve 38 is, for example, an electromagnetic valve that switches the flow of the brake fluid at its installation location from open to closed when it is switched from a non-energized state to an energized state. The pressure increasing valve 39 is, for example, an electromagnetic valve that switches the flow of the brake fluid toward the pump 35 via its installation location from closed to open when it is switched from a non-energized state to an energized state.

During execution of the slip control operation, in a state where it is necessary to apply a frictional force to the front wheels 3 or to increase the applied frictional force, the first control unit 61 de-energizes the inlet valve 32 and the release valve 33. Also, the switching valve 38 and the pressure increasing valve 39 are controlled to be energized, and the motor 36 is driven by a drive amount according to the output signal of the brake fluid pressure sensor 82 . Such control increases the hydraulic pressure of the brake fluid in the wheel cylinder 25 and presses the friction material of the first friction imparting device 21 against the disc rotor 3a. That is, in the first mechanism unit 20, when the slip control operation is executed, the frictional force applied to the front wheel 3 by the first friction applying device 21 is controlled by the inlet valve 32, the release valve 33, and the It changes by controlling the switching valve 38, the pressure increasing valve 39, and the motor 36.

The brake system 10 may be configured to reduce and increase the frictional force applied to the rear wheels 4 during execution of the slip control operation. During execution of the slip control operation, in a state where it is necessary to apply a frictional force to the rear wheel 4 or to increase the applied frictional force, the second control unit 62 responds to the output signal of the friction material motion sensor 93. The actuator 41 is driven by the driving amount. When the second control unit 62 reduces the output of the actuator 41, the spindle 52 is pushed out and the friction material 51 of the second friction applying device 50 is pressed against the disk rotor 4a. That is, in the second mechanism unit 40 , when the slip control operation is executed, the frictional force applied to the rear wheel 4 by the second friction applying device 50 is controlled by the second control unit 62 to control the output of the actuator 41 . change depending on

The second control unit 62 executes parking brake control Sa in which the second friction applying device 50 applies friction force to the rear wheels 4 when the straddle-type vehicle 100 is in a stopped state. Specifically, as shown in FIG. 7, the second control unit 62 acquires output signals from the front wheel rotation speed sensor 81, the rear wheel rotation speed sensor 91, the road surface gradient sensor 83, and the engine ON sensor 84 (Sa01 ), and it is determined whether or not the reference condition is satisfied based on the output signal (Sa02). The first reference condition is that the straddle-type vehicle 100 is stopped and the engine is stopped, and the second reference condition is that the straddle-type vehicle 100 is stopped. and the slope of the road surface on which the straddle-type vehicle 100 is stopped exceeds the reference value. In step Sa02, the second control unit 62 determines that the reference condition is satisfied when either the first reference condition or the second reference condition is satisfied.
When the second control unit 62 determines that the reference condition is satisfied, the second control unit 62 controls the actuator 41 to be in a non-energized state (Sa03). The applying device 50 is controlled to press the disk rotor 4a with the friction material 51 to apply frictional force to the rear wheel 4 for braking. As a result, the saddle-ride type vehicle 100 can be prevented from moving by applying a frictional force to the rear wheels 4 when the vehicle is stopped by parking or when the vehicle is stopped on a slope with a gradient exceeding the reference value. It can be regulated to assist riders.

The second control unit 62 may acquire an output signal from either one of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 and determine whether the vehicle is stopped based on the output signal. Further, the second control unit 62 may determine the stopped state based on the output signal of a sensor other than the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 (for example, vehicle speed sensor, inertial force sensor, etc.). . Further, for example, the first criterion may include that the rider is not seated on the seat of the saddle-ride type vehicle 100, that is, that the rider has gotten off the saddle-ride type vehicle 100. The parking brake control Sa may be executed on the condition that the vehicle is exited. As sensors for detecting that the rider has gotten off the straddle-type vehicle 100, for example, a pressure sensor that is arranged in the seat of the straddle-type vehicle 100 and detects that the rider is seated, a camera that photographs the rider seated on the seat, and the like are attached to the straddle-type vehicle 100. , it is possible to detect whether or not the rider is not seated on the seat (the rider has got off the vehicle) based on the output signals of the sensors.

In the parking brake control Sa, when it is determined that the reference condition is satisfied, the second control unit 62 controls the actuator 41 to be in the non-energized state until the later-described release condition is satisfied. to continue the de-energized state of That is, when the first reference condition is satisfied, the second control unit 62 maintains the non-energized state of the actuator 41 to brake the rear wheels 4 after the straddle-type vehicle 100 is stopped and the engine is stopped. Since the braking is continued, the movement of the saddle-ride type vehicle 100 can be made difficult over the period in which the saddle-ride type vehicle 100 is parked and stopped. Further, when the second reference condition is established, the second control unit 62 maintains the non-energized state of the actuator 41 when the straddle-type vehicle 100 is stopped on the road surface with a gradient exceeding the reference value. Since the rear wheels 4 are braked, it is possible to reduce or prevent the saddle-ride type vehicle 100 from sliding downhill when the saddle-ride type vehicle 100 stops on a slope with a gradient exceeding the reference value.

After executing the parking brake control Sa in step Sa03, the second control unit 62 executes release standby processing for waiting until the condition for releasing the parking brake control is satisfied (Sa04). In the release standby process, the second control unit 62 determines whether or not the engine of the straddle-type vehicle 100 is in operation. Wait until it starts. When the engine is in operation, the output signal of the brake fluid pressure sensor 82 is acquired, and the fluid pressure of the brake fluid exceeds the reference value due to the operation of the first operator by the rider based on the output signal. It is determined whether or not the It is determined that the first release condition is established when the hydraulic pressure of the brake fluid exceeds the reference value by operating the first operator. In the release standby process, the second control unit 62 acquires the output signal of the second manipulator motion sensor 92 when the engine is in operation, and based on the output signal, the rider operates the It is determined whether or not the amount of operation of the second manipulator 12 has increased beyond the reference value. It is determined that the second release condition is satisfied when the amount of operation of the second operator 12 exceeds the reference value. When it is determined that either the first release condition or the second release condition is met, it is determined that the release condition for the parking brake control is met. After the cancellation condition is established, the second control unit 62 executes a cancellation process of controlling the energized state of the actuator 41 (Sa05). In the release process, the second control unit 62 controls the output by energizing the actuator 41 so as to brake the rear wheel 4 with a frictional force corresponding to the amount of operation of the second operator 12 . After the release process is executed, the second control unit 62 terminates the parking brake control and shifts to control of the service brake.

<Effect of brake system>
Effects of the brake system according to the embodiment will be described.

A straddle-type vehicle has a very small body compared to other vehicles (eg, automobiles, trucks, etc.). Therefore, in a conventional brake system for a straddle-type vehicle, it may be difficult to secure a space for arranging the brake fluid pipe and a space for the work. Therefore, in addition to the friction applying device, it may be considered to employ a mechanical section including a manipulator motion sensor that detects the movement of the manipulator and an actuator unitized with the friction applying device. In other words, during service braking (so-called service braking), the control unit increases the output of the actuator as the rider's input to the operator increases, thereby increasing the frictional force applied to the wheels. However, with such a configuration, it may be difficult to apply a frictional force to the wheels when the actuator is de-energized for some reason. In particular, in saddle-type vehicles, compared to other vehicles (e.g., automobiles, trucks, etc.), it is highly necessary to simplify the protection of the friction applying device, so an actuator unitized with the friction applying device is adopted. If so, the possibility of de-energization of that actuator may increase.

On the other hand, in the brake system 10, the mechanism section (second mechanism section 40) operates the wheels (rear wheels 4) of the straddle-type vehicle 100 by the frictional force according to the motion of the operator (second operator 12). a friction applying device (second friction applying device 50) for braking the operator (second operator 12), an operator motion sensor (second operator motion sensor 92) for detecting the movement of the operator (second operator 12), and a friction applying device (second 2) and an actuator 41 unitized with a friction applying device 50), and during normal braking, the control unit (second control unit 62) controls the operating element motion sensor (second operating element motion sensor 92). Based on the detection result, the output of the actuator 41 is controlled to change the frictional force applied to the wheel (rear wheel 4) by the friction applying device (second friction applying device 50). Then, when the actuator 41 is in a non-energized state, frictional force is applied to the wheel (rear wheel 4) by the friction applying device (second friction applying device 50). Therefore, if the actuator 41 is de-energized for some reason, it is possible to apply a frictional force to the wheel (rear wheel 4). It is possible to improve mountability on the straddle-type vehicle 100 .

Preferably, when the actuator 41 is energized, the friction force applied to the wheel (rear wheel 4) by the friction applying device (second friction applying device 50) decreases as the output of the actuator 41 increases. Such a configuration makes it possible to easily improve the mountability of the brake system 10 on the straddle-type vehicle 100 while taking safety into consideration.

Preferably, the control unit (second control unit 62) controls the output of the actuator 41 during the slip control operation for controlling the slip of the wheel (rear wheel 4) to operate the friction imparting device (second friction imparting device 50 ) to change the frictional force applied to the wheel (rear wheel 4). With such a configuration, it is possible to improve safety while maintaining the mountability of the brake system 10 on the straddle-type vehicle 100 .

Preferably, the wheel braked by the friction applying device (second friction applying device 50 ) is the rear wheel 4 of the straddle-type vehicle 100 . With such a configuration, when the power supply is stopped for some reason, even if a large braking force is suddenly generated, the relatively safe rear wheel 4 is braked, thereby ensuring safety. improve sexuality.

A conventional brake system for a straddle-type vehicle includes a mechanism section including a friction applying device that brakes a wheel with a frictional force corresponding to at least the movement of the operator, and the mechanism section receives the movement of the operator. The configuration includes a master cylinder and wheel cylinders communicating with the master cylinder through fluid passages filled with brake fluid. In such a mechanical section, it is difficult to maintain the hydraulic pressure of the brake fluid in the wheel cylinder at a relatively high level to generate a braking force when the operator is not operating the operator. In order to maintain the hydraulic pressure in the wheel cylinder at a relatively high level, it is necessary to change the mechanism, such as adding a solenoid valve, which is not used in the service brake, to the brake piping that constitutes the hydraulic path. is necessary.

On the other hand, in the brake system 10, the mechanism section (second mechanism section 40) operates the wheels (rear wheels 4) of the straddle-type vehicle 100 by the frictional force according to the motion of the operator (second operator 12). a friction applying device (second friction applying device 50) for braking the operator (second operator 12), an operator motion sensor (second operator motion sensor 92) for detecting the movement of the operator (second operator 12), and a friction applying device (second 2) and an actuator 41 unitized with a friction applying device 50), and during normal braking, the control unit (second control unit 62) controls the operating element motion sensor (second operating element motion sensor 92). Based on the detection result, the output of the actuator 41 is controlled to change the frictional force applied to the wheel (rear wheel 4) by the friction applying device (second friction applying device 50). Then, the control unit (second control unit 62) causes the friction applying device (second friction applying device 50) to apply a frictional force to the wheels (rear wheels 4) when the straddle-type vehicle 100 is in a stopped state. is given. Therefore, without changing the configuration of the second friction applying device 50 used for the regular brake, the saddle-ride type vehicle 100 is stopped (for example, when the vehicle is parked, when the vehicle is parked, when it starts on a slope, etc.). When the vehicle is in a stopped state, etc., the movement of the saddle-ride type vehicle 100 can be restricted by applying a frictional force to the rear wheels 4 for braking.

Preferably, the friction applying device (second friction applying device 50) continues to apply frictional force to the wheels (rear wheels 4) even after the vehicle is stopped and the engine of the straddle-type vehicle 100 is stopped. With such a configuration, when the straddle-type vehicle 100 is parked and stopped, the frictional force is applied to the rear wheels 4 to brake the straddle-type vehicle 100, thereby restricting the movement of the straddle-type vehicle 100.例文帳に追加can be done.

Preferably, the friction applying device (second friction applying device 50) applies frictional force to the wheel (rear wheel 4) when the actuator 41 is in a non-energized state. With such a configuration, frictional force can be applied to the wheels (rear wheels 4) without consuming electric power when the vehicle is stopped.

Preferably, the control unit (second control unit 62) determines whether or not the standard condition is satisfied, and if it is determined that the standard condition is satisfied, the friction imparting device (second friction imparting device 50) gives the wheel (rear wheel 4) a frictional force, and the reference condition includes that the rider has dismounted. With such a configuration, when the straddle-type vehicle 100 is parked and stopped, the frictional force is applied to the rear wheels 4 to brake the straddle-type vehicle 100, thereby restricting the movement of the straddle-type vehicle 100.例文帳に追加can be done.
Preferably, the control unit (second control unit 62) determines whether or not the standard condition is satisfied, and if it is determined that the standard condition is satisfied, the friction imparting device (second friction imparting device 50) to apply a frictional force to the wheels (rear wheels 4), and the reference condition includes that the straddle-type vehicle (100) has stopped. With such a configuration, when the saddle-ride type vehicle 100 is stopped, the rear wheels 4 can be braked by applying a frictional force to restrict the movement of the saddle-ride type vehicle 100 .
Preferably, the reference condition includes road surface gradient exceeding a reference value. With such a configuration, when the saddle-ride type vehicle 100 is stopped on a road surface with a gradient exceeding the reference, the rear wheels 4 are braked by applying a frictional force to move the saddle-ride type vehicle 100. can be regulated.

Embodiments of the present invention are not limited to the above description. That is, the present invention includes modifications of the embodiments described above. Moreover, the present invention includes a mode in which only a part of the embodiments described above is implemented, or a mode in which some of the modes are combined.

For example, in the above description, the slip control operation can be executed in both the first mechanism unit 20 and the second mechanism unit 40, but at least one of the first mechanism unit 20 and the second mechanism unit 40: Slip control action may be disabled. In other words, the liquid pressure adjustment unit 30 may be omitted from the first mechanism section 20 .

1 Body 2 Handle 3 Front Wheel 4 Rear Wheel 10 Brake System 11 First Operator 12 Second Operator 20 First Mechanism Part 21 First Friction Giving Device 22 Master Cylinder 23 Reservoir 24 LIQUID PATH 25 WHEEL CYLINDER 30 HYDRAULIC PRESSURE ADJUSTING UNIT 31 BASE 32 INSTALLING VALVE 33 RELEASE VALVE 34 ACCUMULATOR 35 PUMP 36 MOTOR 37 HOUSING 38 SWITCHING VALVE 39 BOOST PRESSURE VALVE 40 SECOND MECHANISM , 41 actuator, 50 second friction applying device, 51 friction material, 52 spindle, 60 control device, 61 first control unit, 62 second control unit, 81 front wheel rotation speed sensor, 82 brake fluid pressure sensor, 83 road gradient sensor , 84 engine ON sensor, 91 rear wheel rotation speed sensor, 92 second operator motion sensor, 93 friction material motion sensor, 100 saddle type vehicle.

Claims (8)

A braking system (10) for a saddle-type vehicle (100) comprising at least one operator (12) operated by a rider, comprising:
a mechanism (40) including a friction applying device (50) for braking a wheel (4) of a straddle-type vehicle (100) with a frictional force corresponding to at least the movement of the operator (12);
The mechanism section (40) further includes a manipulator motion sensor (92) for detecting the movement of the manipulator (12), and an actuator (41) unitized together with the friction applying device (50). contains
Furthermore, during normal braking, the output of the actuator (41) is controlled based on the detection result of the operating element motion sensor (92), and the friction applying device (50) applies the friction to the wheel (4). A control unit (62) that changes the frictional force is provided,
The control unit (62) causes the friction applying device (50) to apply the frictional force to the wheels (4) when the straddle-type vehicle (100) is in a stopped state.
A braking system (10). The friction applying device (50) continues applying the frictional force to the wheel (4) even after the vehicle is stopped and the engine of the straddle-type vehicle (100) is stopped.
A braking system (10) according to claim 1. The friction applying device (50) applies the frictional force to the wheel (4) when the actuator (41) is in a non-energized state.
Braking system (10) according to claim 1 or 2. The control unit (62) determines whether or not a standard condition is satisfied, and if it is determined that the standard condition is satisfied, the friction applying device (50) applies the friction to the wheel (4). give power,
The reference condition includes that the rider has dismounted,
A braking system (10) according to any preceding claim. The control unit (62) determines whether or not a standard condition is satisfied, and if it is determined that the standard condition is satisfied, the friction applying device (50) applies the friction to the wheel (4). give power,
the reference condition includes that the straddle-type vehicle (100) has stopped;
A braking system (10) according to any preceding claim. The reference condition includes that the road surface slope exceeds a reference value,
A braking system (10) according to claim 5. The wheel braked by the friction applying device (50) is the rear wheel (4) of the straddle-type vehicle (100),
Braking system (10) according to any one of the preceding claims. comprising a braking system (10) according to any one of claims 1 to 7,
A straddle-type vehicle (100).

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