Brake system and saddled vehicle

Abstract

The purpose of the present invention is to provide a brake system for a saddled vehicle with which it is possible to improve safety. A brake system 100 includes a front-wheel braking unit 20 for braking a front wheel 3 and a rear-wheel braking unit 50 for braking a rear wheel 4. The front-wheel braking unit 20 includes a front-wheel friction application device 40 for applying a frictional braking force to the front wheel 3 in accordance with the movement of an operation element 11 to perform braking. The rear-wheel braking unit 50 includes a regenerative braking device 51 for generating a regenerative braking force on the rear wheel 4 to perform braking, and further includes a rear-wheel friction application device 52 for moving friction members 53a, 53b to apply a frictional braking force to the rear wheel 4 to perform braking, and an actuator 55 that is integrated into a single unit with the rear-wheel friction application device 52 and is for moving the friction members 53a, 53b.

Description

[0001] [Document name] Statement

[0002] [Title of invention] Brake system and saddle-type vehicle

[0003] [Technical Field]

[0004]

[001] The present invention relates to a brake system for a saddle-ride type vehicle and a saddle-ride type vehicle equipped with the brake system.

[0005] [Background technology]

[0006]

[002] Conventionally, brake systems for saddle-ride vehicles include, for example, a configuration that includes a friction brake that applies a friction braking force to the wheels in response to the rider's operation of the brake lever, and a regenerative brake that applies a regenerative braking force to the wheels by making the motor that drives the wheels function as a generator (see, for example, Patent Document 1).

[0007] [Prior art documents]

[0008] [Patent documents]

[0009]

〇 0 0 3

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2023-149798

[0011] Summary of the Invention

[0012] [Problem to be solved by the invention]

[0013]

[0004] In a brake system such as that described in Patent Document 1, the regenerative brake is configured to brake the wheel by causing the motor to function as a generator using the rotation of the wheel, so for example, if the rotation of the wheel is slow, the regenerative braking force may decrease, or if there is insufficient free capacity to store electricity in the vehicle's battery, the motor may not function as a generator and regenerative braking force may not be generated. In such cases, there is a risk that the braking force of the saddle-type vehicle may be insufficient, thereby reducing safety.

[0014]

[0005] The present invention has been made against the background of the above-mentioned problems, and aims to provide a brake system for a saddle-type vehicle that can improve safety.

[0015] [Means for solving the problem]

[0016] [0 0 0 6] The brake system according to the present invention is a brake system for a saddle-riding vehicle equipped with at least one operator operated by a rider, and includes a front wheel braking unit that brakes the front wheel of the saddle-riding vehicle, and a rear wheel braking unit that brakes the rear wheel of the saddle-riding vehicle, wherein the front wheel braking unit includes a front wheel side friction imparting device that applies frictional braking force to the front wheel according to the hydraulic pressure of brake fluid generated according to at least the movement of the operator, and the rear wheel braking unit includes a regenerative braking device that generates regenerative braking force in the rear wheel to brake it, and the rear wheel braking unit further includes a rear wheel side friction imparting device that moves friction material to apply frictional braking force to the rear wheel to brake it, and an actuator that is unitized with the rear wheel side friction imparting device and moves the friction material.

[0017]

[0007] According to this configuration, in the brake system, the front wheel braking unit includes a front wheel-side friction imparting device, the rear wheel braking unit includes a regenerative braking device, and the rear wheel braking unit further includes a rear wheel-side friction imparting device and an actuator united with the rear wheel-side friction imparting device. Therefore, under normal circumstances, braking force can be generated by the front wheel-side friction imparting device and the regenerative braking device. On the other hand, in cases where, for example, the regenerative braking force provided by the regenerative braking device decreases, the regenerative braking device cannot generate regenerative braking force, or the friction braking force provided by the front wheel-side friction imparting device is insufficient due to a malfunction or the like, the brake system can operate the actuator united with the rear wheel-side friction imparting device to generate friction braking force on the rear wheels, thereby slowing down and stopping the saddle-riding vehicle. This improves the safety of the saddle-riding vehicle.

[0018]

[0008] A straddle-type vehicle according to the present invention is configured to include the above-described brake system. With this configuration, the same effects as those of the above-described brake system can be achieved.

[0019]

[0009] A straddle-type vehicle according to the present invention is configured to include the above-described brake system.

[0020] [Brief explanation of the drawings]

[0021] [ 0 0 1 0 ]

[0022] [Figure 1] A diagram for explaining a saddle-type vehicle related to an embodiment.

[0023] [Figure 2] A diagram for explaining the brake system.

[0024] [Figure 3] A diagram for explaining the hydraulic control unit.

[0025] FIG. 4 is a diagram for explaining a rear wheel side friction imparting device and an actuator.

[0026] [Figure 5] A diagram for explaining the control device.

[0027] [Figure 6] A diagram for explaining the flow of rear wheel friction imparting control operation executed by the control device.

[0028] [Mode for Carrying Out the Invention]

[0029]

[0011] An example of an embodiment of a brake system according to the present invention and a saddle-type vehicle equipped with the brake system will be described with reference to the drawings. In this embodiment, an example in which the brake system is mounted on a motorcycle as a saddle-type vehicle will be described, but the brake system according to the present invention may be mounted on saddle-type vehicles other than motorcycles. A saddle-type vehicle refers to any vehicle on which a rider straddles and rides. Examples of saddle-type vehicles include motorcycles, noogie, and bicycles. Motorcycles include two-wheeled vehicles and three-wheeled vehicles that use an engine or an electric motor as a propulsion source, such as motorcycles, scooters, and electric scooters. A bicycle refers to any vehicle that can be propelled by the rider's pedaling force applied to the pedals. Examples of bicycles include standard bicycles, electrically assisted bicycles, and electric bicycles.

[0030]

[0012] The configurations, operations, etc. described in this embodiment are merely examples, and the brake system and saddle-type vehicle according to the present invention are not limited to such configurations, operations, etc. Furthermore, in each drawing, the same or similar members or parts are denoted by the same reference numerals, or the reference numerals may be omitted. Furthermore, explanations and illustrations of detailed structures may be simplified or omitted as appropriate. Furthermore, duplicate or similar explanations may be simplified or omitted as appropriate.

[0031] [ 0 0 1 3 ]

[0032] <Embodiment> Hereinafter, an embodiment of a brake system according to the present invention and a saddle-type vehicle equipped with the brake system will be described with reference to Figs. 1 to 6.

[0033]

[0014] Fig. 1 is a diagram for explaining a saddle-ride type vehicle according to an embodiment. Fig. 2 is a diagram for explaining a brake system. Fig. 3 is a diagram for explaining a hydraulic control unit. Fig. 4 is a diagram for explaining a rear wheel friction imparting device and an actuator. Fig. 5 is a diagram for explaining a control device. Fig. 6 is a diagram for explaining a flow of a rear wheel friction imparting control operation executed by the control device.

[0034] [ 0 0 1 5 ]

[0035] 1 and 2, a motorcycle 10 as a saddle-ride type vehicle includes a body 1, a handlebar 2 rotatably held by the body 1, a front wheel 3 rotatably held by the body 1 together with the handlebar 2, a rear wheel 4 rotatably held by the body 1, an electric motor 5 serving as a drive source for driving the rear wheel 4, a power unit 6 that supplies power to the electric motor 5, and a brake system 100 that brakes the front wheel 3 and the rear wheel 4.

[0016] The electric motor 5 is an electric motor (for example, an AC motor, a brushless DC motor, a synchronous motor, an induction motor, a wheel-in motor, etc.) that receives power from the power unit 6 and can drive the rear wheel 4. The electric motor 5 can also function as a generator, generating regenerative torque to brake the rear wheels 4, as described below.

[0036]

[0017] The power unit 6 includes a power storage device 6a (e.g., a storage battery, a capacitor, etc.) that temporarily stores input power and supplies the stored power to the electric motor 5, and a power control device 6b that controls the power to charge the power storage device 6a and the power supplied from the power storage device 6a to the electric motor 5.

[0037]

[0018] Brake system 100 is a system that has an operator 11 operated by the rider of motorcycle 10, as described below, and controls the braking of motorcycle 10.

[0038] [00 1 9]

[0039] <Regarding the brake system> As shown in Figures 1 and 2, the brake system 100 includes an operator 11, an operating means 12, a front wheel braking unit 20 that brakes the front wheels 3, a rear wheel braking unit 50 that brakes the rear wheels 4, and a control device 70 that controls the braking of the front wheels 3 and the rear wheels 4.

[0040]

[0020] The operator 11 is configured as a brake lever provided on the handlebars 2 and is operated by the rider's hand. The operator 11 is connected to a master cylinder 22 that generates hydraulic pressure of brake fluid in response to the movement of the operator 11, and the operator 11 and front wheel braking unit 20 are hydraulically connected. The operating means 12 is configured as a brake pedal provided on the body 1 and is operated by the rider's foot.

[0041]

[0021] In this embodiment, the brake system 100 is configured to include an operator 11 operated by the rider's hand, but the brake system may be configured to include an operator operated by something other than the rider's hand, such as the rider's foot. Also, the brake system 100 may be configured to include a plurality of operators, such as a first operator corresponding to the front wheel braking unit 20 and a second operator corresponding to the rear wheel braking unit 50.

[0042] [0 02 2]

[0043] <Regarding the front wheel braking section> As shown in Figure 2, the front wheel braking section 20 includes a master cylinder 22, a reservoir 23, a hydraulic passage 24, a hydraulic control unit 30, and a front wheel side friction imparting device 40.

[0044]

[0023] As described above, master cylinder 22 is connected to operator 11, and the movement of operator 11 is transmitted to master cylinder 22, generating brake fluid pressure corresponding to the movement of operator 11. Master cylinder 22 is also connected to wheel cylinder 25 built into front wheel friction imparting device 40 via fluid path 24 filled with brake fluid, and fluid pressure control unit 30 is connected to fluid path 24. Master cylinder 22 is also connected to reservoir 23 that stores brake fluid. Reservoir 23 is attached to master cylinder 22.

[0045]

[0024] The fluid path 24 is filled with brake fluid and includes a brake fluid pipe 24a connecting the master cylinder 22 and the fluid pressure control unit 30, a brake fluid pipe 24b connecting the fluid pressure control unit 30 and the wheel cylinder 25, and internal flow paths 24c to 24e formed inside the fluid pressure control unit 30.

[0046]

[0025] The front wheel side friction imparting device 40 applies frictional force to the front wheel 3 by pressing a friction material (not shown) held in the body 1 against the disc rotor 3 a that rotates together with the front wheel 3 in response to an increase in hydraulic pressure of the brake fluid in the wheel cylinder 25, thereby generating or increasing frictional braking force on the front wheel 3 and braking the front wheel 3. Note that the front wheel side friction imparting device 40 may have other structures, such as a configuration in which the friction material of a brake shoe held in the body 1 is pressed against a brake drum that rotates together with the front wheel 3 to generate frictional braking force according to the amount of operation of the operating element 11.

[0047]

[0026] As shown in Fig. 2 and Fig. 3, the hydraulic control unit 30 has a base body 31. The base body 31 is formed with a master cylinder port MP to which a brake fluid pipe 24a is connected, a wheel cylinder port WP to which a brake fluid pipe 24b is connected, a main fluid path 24c which constitutes part of the fluid path 24 and is an internal fluid path connecting the master cylinder port MP and the wheel cylinder port WP, and a sub-fluid path 24d which constitutes part of the fluid path 24 and is an internal fluid path that bypasses the main fluid path 24c.

[0048]

[0027] The main fluid path 24c is provided with an inlet valve 32. The secondary fluid path 24d connects the area of ​​the main fluid path 24c closer to the master cylinder port MP than the inlet valve 32 with the area of ​​the main fluid path 24c closer to the wheel cylinder port WP than the inlet valve 32. Of the two ends of the secondary fluid path 24d, the side connected to the area of ​​the main fluid path 24c closer to the wheel cylinder port WP is the upstream side, and the secondary fluid path 24d is provided with, in order from the upstream side, a release valve 33, an accumulator 34, and a pump 35.

[0049]

[0028] The base 31 also has an internal flow path, a booster fluid path 24e, which connects a region of the main fluid path 24c on the master cylinder port MP side of the junction of the main fluid path 24c and the downstream end of the sub-fluid path 24d, to a region of the sub-fluid path 24d between the accumulator 34 and the pump 35. A switch valve 38 is provided between the junction of the main fluid path 24c with the booster fluid path 24e and the junction of the downstream end of the sub-fluid path 24d, and a booster valve 39 is provided midway along the booster fluid path 24e.

[0050]

[0029] The inlet valve 32 and the switching valve 38 are solenoid valves that, for example, when controlled to a non-energized state by the control device 70, are in an open state that allows the flow of brake fluid, and when controlled to a powered state, are in a closed state that blocks the flow of brake fluid. The release valve 33 and the pressure increase valve 39 are solenoid valves that, for example, when controlled to a non-energized state by the control device 70, are in a closed state that blocks the flow of brake fluid, and when controlled to a powered state, are in an open state that allows the flow of brake fluid. The inlet valve 32, the release valve 33, the switching valve 38, and the pressure increase valve 39 are controlled between an energized state and an unenergized state by the control device 70, which will be described later.

[0051]

[0030] The accumulator 34 temporarily stores the brake fluid released from the wheel cylinder 25 when the release valve 32 is in an open state.

[0052]

[0031] Pump 35 is driven by motor 36 and moves brake fluid stored in accumulator 34 to an area of ​​main fluid path 24c closer to master cylinder port MP than inlet valve 32. When inlet valve 32 and pressure-increasing valve 39 are open, brake fluid stored in reservoir 23 can be moved to an area of ​​main fluid path 24c closer to master cylinder port MP than inlet valve 32, thereby increasing the hydraulic pressure in wheel cylinder 25. The drive state of motor 36 is controlled by control device 70.

[0053]

[0032] The inlet valve 32, the release valve 33, the accumulator 34, the pump 35, the motor 36, the switching valve 38, and the booster valve 39 are assembled to the base 31. The inlet valve 32, the release valve 33, the accumulator 34, the pump 35, the motor 36, the switching valve 38, and the control device 70 are housed inside a housing 37 attached to the base 31.

[0033] The hydraulic pressure control unit 30 includes a first hydraulic pressure sensor 82 that detects the hydraulic pressure of the brake fluid in the area of ​​the main fluid path 24c on the master cylinder 22 side, and a second hydraulic pressure sensor 83 that detects the hydraulic pressure of the brake fluid in the area of ​​the main fluid path 24c on the wheel cylinder 25 side. The hydraulic pressure control unit 30 may also be configured to include a sensor that detects another physical quantity that can be substantially converted into the hydraulic pressure of the brake fluid in the master cylinder 22 and the wheel cylinder 25. Alternatively, the hydraulic pressure control unit 30 may be configured to include only one of the first hydraulic pressure sensor 82 and the second hydraulic pressure sensor 83. In addition, the hydraulic pressure of the brake fluid in the master cylinder 22 or the area of ​​the main fluid path 24c on the master cylinder 22 side, and / or the hydraulic pressure of the brake fluid in the wheel cylinder 25 or the area of ​​the main fluid path 24c on the wheel cylinder 25 side may be estimated based on other physical quantities that can be substantially converted into these values.

[0054]

[0034] As described above, the hydraulic control unit 30 includes the internal flow paths 24c to 24e, the inlet valve 32, the release valve 33, the accumulator 34, the pump 35, the motor 36, the switching valve 38, and the pressure increase valve 39. The operation of the inlet valve 32, the release valve 33, the motor 36, the switching valve 38, and the pressure increase valve 39 is controlled by the control device 70 described below, thereby controlling the hydraulic pressure of the brake fluid supplied to the wheel cylinder 25.

[0055] [ 0 0 3 5 ]

[0056] <Regarding the rear wheel braking unit> As shown in Figure 2, the rear wheel braking unit 50 includes a regenerative braking device 51, a rear wheel side friction imparting device 52, and an actuator 55.

[0057]

[0036] The regenerative braking device 51 generates a regenerative braking force on the rear wheels 4 to brake them. The regenerative braking device 51 includes, for example, an electric motor 5 and a power unit 6. As described above, the power unit 6 includes a power storage device 6a and a power control device 6b. The power control device 6b causes the electric motor 5 to function as a generator and causes the electric motor 5 to generate a regenerative torque in the opposite direction to the rotation direction of the rear wheels 4. The regenerative torque is then applied to the rear wheels 4 as a regenerative braking force to brake the rear wheels 4. The power control device 6b also controls the amount of charge to the power storage device 6a to control the amount of power generated by the electric motor 5, thereby controlling the regenerative torque, i.e., the regenerative braking force, generated by the electric motor 5. In addition, the regenerative braking device 51 may be configured to include a dedicated generator that functions as a generator using the rotational force of the rear wheel 4.

[0058]

[0037] As shown in Fig. 4, the rear wheel side friction imparting device 52 is configured as a floating caliper and is unitized with the actuator 55. The rear wheel side friction imparting device 52 includes a pair of friction materials 53a, 53b that sandwich a disc rotor 4a that rotates together with the rear wheel 4, and a spindle 54 that adjusts the distance between the friction materials 53a, 53b and the disc rotor 4a. The actuator 55 includes an electric motor and a mechanism (not shown) that linearly moves the spindle 54 in response to the rotational movement of the electric motor. The actuator 55 is controlled by a control device 70, and can adjust the distance of the friction materials 53a, 53b to the disc rotor 4a by driving the electric motor to cause the spindle 54 to move linearly. The rear wheel friction imparting device 52 applies frictional force to the rear wheel 4 and brakes the rear wheel 4 by bringing the friction materials 53a, 53b into contact with the disc rotor 4a. The rear wheel side friction imparting device 52 may be configured to apply frictional force to the rear wheel 4 by moving the friction materials 53a, 53b through the operation of an actuator 55 united with the rear wheel side friction imparting device 52, thereby braking the rear wheel 4. For example, the mechanism that adjusts the distance from the disc rotor 4a using the spindle 54 may be configured to transmit the linear motion of the spindle 54 to the friction material via an elastic member, or may be configured to transmit the linear motion of the spindle 54 to the friction material via a fluid such as hydraulic fluid. The rear wheel side friction imparting device 52 may have a structure other than a floating caliper, for example, it may be configured as an opposed caliper. The actuator 55 may be configured to be attached to the outside of the rear wheel side friction imparting device 52, or may be configured to be built into the rear wheel side friction imparting device 52.

[0059]

[0038] The rear wheel side friction imparting device 52 moves the spindle 54 in a first direction by driving the actuator 55 in response to a control signal from the control device 70. In response to the movement of the spindle 54 in the first direction, the friction materials 53a, 53b are moved in a direction to press against the disc rotor 4a of the rear wheel 4, and the friction materials 53a, 53b are pressed against the disc rotor 4a, thereby generating or increasing a frictional braking force that brakes the rear wheel 4. On the other hand, the rear wheel side friction imparting device 52 moves the spindle 54 in a second direction opposite to the first direction by driving the actuator 55 in response to a control signal from the control device 70, and in response to the movement of the spindle 54 in the second direction, moves the friction materials 53a, 53b pressed against the disc rotor 4a in a direction away from the disc rotor 4a of the rear wheel 4, thereby reducing the friction braking force that brakes the rear wheel 4. Also, the rear wheel side friction imparting device 52 moves the spindle 54 in the second direction to move the friction materials 53a, 53b away from the disc rotor 4a of the rear wheel 4, thereby preventing the generation of friction braking force that brakes the rear wheel 4.

[0060]

[0039] As described above, the rear wheel friction imparting device 52 is not hydraulically connected to the operating element 11, but is unitized with the actuator 55 which operates in response to a control signal from the control device 70. Using a so-called by-wire system, the friction materials 53a, 53b are moved to impart friction braking force to the rear wheel 4, thereby braking the wheel.

[0061]

[0040] <Regarding the control device> As shown in Fig. 5, the control device 70 includes a first control unit 71 that controls the operation of the inlet valve 32, the release valve 33, the motor 36, the switching valve 38, and the pressure increase valve 39 provided in the hydraulic control unit 30, a second control unit 72 that controls the operation of the regenerative braking device 51, a third control unit 73 that controls the operation of the actuator 55, and an acquisition unit 74 that acquires output signals from various sensors. The control device 70 is unitized with the hydraulic control unit 30 and is disposed in the body 1 of the motorcycle 10. Some or all of the first control unit 71, the second control unit 72, and the third control unit 73 may be composed of, for example, a microcomputer, a microprocessor unit, etc., or may be composed of updatable software firmware, etc., or may be a program module, etc., executed by instructions from a CPU, etc.

[0062]

[0041] The control device 70 is electrically connected to various sensors, including a front wheel rotation speed sensor 81, a first hydraulic pressure sensor 82, a second hydraulic pressure sensor 83, a rear wheel rotation speed sensor 91, a remaining battery charge sensor 92, a friction material movement sensor 93, an operating means sensor 94, a road surface gradient sensor 95, and a key switch sensor 96, and the output signals of these sensors are input via wire or wirelessly. The control device 70 can also perform various arithmetic processing and various operational controls, which will be described later, based on the output signals of these sensors. The control device 70 is also electrically connected to the inlet valve 32, the release valve 33, the motor 36, the switching valve 38, the pressure booster valve 39, the power control device 6b, and the actuator 55, and outputs control signals to these devices via wire or wirelessly to control their operation.

[0063]

[0042] The front wheel rotation speed sensor 81 detects the rotation speed of the front wheel 3. The front wheel rotation speed sensor 81 is held by, for example, the body 1. The front wheel rotation speed sensor 81 may also detect another physical quantity that can be substantially converted into the rotation speed of the front wheel 3.

[0064]

[0043] The first hydraulic pressure sensor 82 detects the hydraulic pressure of the brake fluid in the area on the master cylinder 22 side of the main fluid path 24c of the hydraulic control unit 30. As described above, the first hydraulic pressure sensor 82 is provided in the hydraulic control unit 30 (see FIG. 2). The first hydraulic pressure sensor 82 may be provided in the master cylinder 22 and detect the hydraulic pressure of the brake fluid in the master cylinder 22. The first hydraulic pressure sensor 82 may also detect other physical quantities that can be substantially converted into the hydraulic pressure of the brake fluid in the master cylinder 22 (for example, the operation amount of the operator 11, the displacement of the operator 11, the displacement of the piston in the master cylinder 22, etc.).

[0065]

[0044] The second hydraulic pressure sensor 83 detects the hydraulic pressure of the brake fluid in the area on the wheel cylinder 25 side of the main hydraulic path 24c of the hydraulic control unit 30. The second hydraulic pressure sensor 83 is provided, for example, in the hydraulic control unit 30 as described above (see FIG. 2). The second hydraulic pressure sensor 83 may also be provided in the wheel cylinder 25 to detect the hydraulic pressure of the brake fluid in the wheel cylinder 25. The second hydraulic pressure sensor 83 may also detect another physical quantity that can be substantially converted into the hydraulic pressure of the brake fluid in the wheel cylinder 25 (for example, the displacement of the friction material of the front wheel friction imparting device 40).

[0066]

[0045] Rear wheel rotation speed sensor 91 detects the rotation speed of rear wheel 4. Rear wheel rotation speed sensor 91 is held by, for example, body 1. Note that rear wheel rotation speed sensor 91 may also detect other physical quantities that can be substantially converted into the rotation speed of rear wheel 4.

[0067]

[0046] The remaining power storage sensor 92 detects the amount of power stored in the power storage device 6 a. The remaining power storage sensor 92 is provided, for example, in the power storage device 6 a. The remaining power storage sensor 92 may also detect other physical quantities that can be substantially converted into the amount of power stored in the power storage device 6 a (for example, the voltage value of a storage battery provided in the power storage device 6 a, the current value input / output to / from the power storage device 6 a, the available capacity of the power storage device 6 a for storing power, etc.).

[0068]

[0047] The friction material movement sensor 93 detects the movement of the friction materials 53a and 53b of the rear wheel-side friction imparting device 52. The friction material movement sensor 93 is held, for example, by the front wheel-side friction imparting device 40. The friction material movement sensor 93 may also detect other physical quantities that can be substantially converted into the friction braking force generated on the rear wheel 4 by the rear wheel-side friction imparting device 52 (for example, the drive amount of the actuator 55, the current value for driving the actuator 55, the reaction force acting on the spindle 54, the reaction force acting on the friction material, etc.). The friction material movement sensor 93 may also detect other physical quantities that can be substantially converted into the drive amount of the actuator 55 or the reaction force acting on the spindle 54.

[0069]

[0048] The operation means sensor 94 detects the ON / OFF state of the operation means 12. The operation means sensor 94 is held by the body 1 together with the operation means 12, for example.

[0070]

[0049] The road gradient sensor 95 detects the gradient of the road on which the motorcycle 10 is traveling or stopped. The road gradient sensor 95 is held by, for example, the body 1. The road gradient sensor 95 may also detect other physical quantities that can be substantially converted into the gradient of the road.

[0071]

[0050] The key switch sensor 96 detects the ON / OFF state of a key switch (so-called ignition switch) that is operated when the rider starts using the motorcycle 10. The key switch sensor 96 is held by, for example, the body 1. The key switch sensor 96 may also detect another physical quantity that can substantially detect when the rider starts using the motorcycle 10.

[0072]

[0051] The first control unit 71, the second control unit 72, the third control unit 73, and the acquisition unit 74 are housed in the housing 37 of the hydraulic control unit 30 and are unitized together with the hydraulic pressure adjustment mechanism (for example, the inlet valve 32, the release valve 33, the motor 36, the switching valve 38, the pressure increase valve 39, etc.). With this configuration, the sealing structure of the first control unit 71, the second control unit 72, the third control unit 73, the acquisition unit 74, and the hydraulic pressure adjustment mechanism can be standardized, thereby improving the productivity of the brake system 100 and reducing manufacturing costs.

[0073]

[0052] In this embodiment, the first control unit 71, the second control unit 72, the third control unit 73, and the acquisition unit 74 are configured to be arranged in the control device 70 that is unitized with the hydraulic control unit 30. However, the first control unit 71, the second control unit 72, the third control unit 73, and the acquisition unit 74 may be configured to be unitized with any of the electric motor 5, the power storage device 6a, the power control device 6b, and the actuator 55, or may be configured to be divided into multiple units and arranged in the motorcycle 10. For example, the first control unit 71 may be unitized with the hydraulic control unit 30, the second control unit 72 may be unitized with the regenerative braking device 51, and the third control unit may be unitized with the actuator 55. In addition, the acquisition unit 74 may be configured to be integrated into one unit and placed together with either the first control unit 71, the second control unit 72, or the third control unit 73, or may be configured to be divided and placed corresponding to the first control unit 71 to the third control unit 73.

[0074] [ 0 0 5 3 ]

[0075] <Regarding the controls performed by the control device> Below, we will explain the various operational controls performed by the control device 70 (for example, normal brake control operation, linked brake control operation, anti-lock operation control, slip control operation, rear wheel friction control operation, etc.).

[0076]

[0054] The control device 70 can, for example, perform a normal brake control operation in which the front wheel friction applying device 40 applies a friction braking force to the front wheel 3 in accordance with the movement of the operating element 11. In the normal brake control operation, for example, when the motorcycle 10 is stopped or when the motorcycle 10 is traveling without any slippage exceeding a reference value occurring in the front wheel 3 or the rear wheel 4, the first control unit 71 controls the inlet valve 32, the release valve 33, the switching valve 38, and the pressure increase valve 39 to a non-energized state and controls the motor 36 to a non-driven state. In this state, when the rider operates the operating element 11, that is, during normal braking, the hydraulic pressure of the brake fluid in the master cylinder 22 increases in accordance with the movement of the operating element 11, which in turn increases the hydraulic pressure of the brake fluid in the wheel cylinder 25, causing the friction material of the front wheel friction imparting device 40 to move in a direction pressing against the disc rotor 3a, thereby generating or increasing the frictional braking force of the front wheel 3. Thereafter, when the rider releases the operating element 11 to end the operation, the hydraulic pressure of the brake fluid in the master cylinder 22 decreases in accordance with the movement of the operating element 11, which in turn decreases the hydraulic pressure of the brake fluid in the wheel cylinder 25, causing the friction material of the front wheel friction imparting device 40 to move in a direction away from the disc rotor 3a, thereby reducing or eliminating the frictional braking force of the front wheel 3. In other words, during normal braking, the front wheel braking unit 20 can apply a frictional force to the front wheels 3 by the front wheel side friction applying device 40 in accordance with the hydraulic pressure of the brake fluid in the master cylinder 22 and the wheel cylinder 25, which is generated in response to the movement of the operating element 11, thereby braking the front wheels 3.

[0077]

[0055] Furthermore, the control device 70 can execute an interlocking brake control operation in which the braking force requested by the rider based on the movement of the operating element 11 (hereinafter, sometimes referred to as the requested braking force) is shared between the front wheel friction imparting device 40 and the regenerative braking device 51. In the interlocking brake control operation, the acquisition unit 74 first acquires the requested braking force based on the output signal of the first hydraulic pressure sensor 82, acquires driving information (e.g., speed, inclination of the vehicle body) relating to the driving state of the motorcycle 10 based on the output signals of the front wheel rotation speed sensor 81, the rear wheel rotation speed sensor 91, etc., and acquires capacity information relating to the available capacity of the storage device 6 a based on the output signal of the remaining storage capacity sensor 92. Next, the first control unit 71 calculates the regenerative braking force that can be generated by the regenerative braking device 51 based on the driving information and capacity information acquired by the acquisition unit 74, compares the regenerative braking force with the required braking force, and determines whether the required braking force exceeds the regenerative braking force. If it is determined that the required braking force exceeds the regenerative braking force, the first control unit 71 controls the hydraulic control unit 30 to generate a braking force equal to the difference between the required braking force and the regenerative braking force as a friction braking force using the front wheel friction imparting device 40, and outputs a control signal to the second control unit 72 indicating that the regenerative braking force is to be generated, thereby controlling the regenerative braking device 51 to generate the regenerative braking force. On the other hand, if it is determined that the required braking force does not exceed the regenerative braking force, the first control section 71 controls the hydraulic control unit 30 so that the front wheel friction imparting device 40 does not generate a frictional braking force, and controls the regenerative braking device 51 so that a regenerative braking force equivalent to the required braking force is generated. Note that in the linked brake control operation, when the first control section 71 allocates the required braking force to the front wheel friction imparting device 40 and the regenerative braking device 51, the allocation may be, for example, in a ratio of frictional braking force at the front wheel 3 to regenerative braking force at the rear wheel 4 so that braking is performed while suppressing a decrease in the running stability of the motorcycle 10.

[0078]

[0056] Furthermore, when at least one of the front wheels 3 and the rear wheels 4 is locked or there is a possibility that the wheels will lock, the first control unit 71 and the second control unit 72 perform an anti-lock control operation to prevent the wheels from locking. In the anti-lock control operation, the first control unit 71 determines whether the front wheels 3 are locked or there is a possibility that the wheels will lock, for example, based on the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 acquired by the acquisition unit 74. When it is determined that the wheels are locked or there is a possibility that the wheels will lock, the first control unit 71 controls the hydraulic pressure control unit 30 to reduce the hydraulic pressure of the brake fluid in the wheel cylinder 25, thereby unlocking the front wheels 3 or reducing the possibility that the wheels will lock. Furthermore, the second control unit 72 determines whether the rear wheel 4 is locked or is likely to lock, based on the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 acquired by the acquisition unit 74. If it is determined that the rear wheel 4 is locked or is likely to lock, the second control unit 72 controls the regenerative braking device 51 to reduce the regenerative braking force, thereby unlocking the rear wheel 4 or reducing the possibility of locking. The first control unit 71 and the second control unit 72 can determine whether the front wheel 3 and the rear wheel 4 of the motorcycle 10 are locked or are likely to lock, using a well-known method that uses the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91, etc.

[0079]

[0057] Furthermore, the first control unit 71 and the second control unit 72 perform slip control operations to suppress slip when at least one of the front wheels 3 and the rear wheels 4 is experiencing slippage exceeding a reference value or is in a state where slippage is likely to occur. In the slip control operation, the first control unit 71 determines whether the front wheels 3 are experiencing slippage exceeding a reference value or are in a state where slippage is likely to occur, for example, based on the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 acquired by the acquisition unit 74. If it is determined that slippage exceeding the reference value or is in a state where slippage is likely to occur, the first control unit 71 controls the hydraulic control unit 30 to increase or decrease the brake fluid in the wheel cylinder 25, thereby suppressing slippage of the front wheels 3 or reducing the possibility of slippage. Furthermore, the second control unit 72 determines whether the rear wheel 4 is slipping beyond a reference value or is at risk of slipping, based on the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 acquired by the acquisition unit 74. If it is determined that the rear wheel 4 is slipping beyond the reference value or is at risk of slipping, the second control unit 72 controls the regenerative braking device 51 to increase or decrease the regenerative braking force, thereby suppressing slippage of the rear wheel 4 or reducing the risk of slipping. The first control unit 71 and the second control unit 72 can determine whether slippage is occurring in the front wheel 3 and the rear wheel 4 of the motorcycle 10 and the risk of slippage using a well-known method that uses the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91, etc.

[0080]

[0058] In the antilock control operation and the slip control operation, when the first control unit 71 and the second control unit 72 reduce the braking force of one wheel, they may control the hydraulic control unit 30 or the regenerative braking device 51 to apply the reduced braking force to the other wheel. This allows the reduction in braking force of one wheel to be compensated for by the braking force of the other wheel.

[0081]

[0059] When a reference condition described later is met, the third control unit 73 can execute a rear wheel friction imparting control operation Sa to impart friction braking force to the rear wheel 4 by the rear wheel-side friction imparting device 52. The rear wheel friction imparting control operation Sa will be described with reference to FIG. 6.

[0082] 6, in the rear wheel friction imparting control operation Sa, first, the acquisition unit 74 acquires output signals from the front wheel rotation speed sensor 81, the first hydraulic pressure sensor 82, the second hydraulic pressure sensor 83, the rear wheel rotation speed sensor 91, the road surface gradient sensor 95, and the key switch sensor 96 (Sa01). Thereafter, the third control unit 73 determines whether or not the reference condition is satisfied based on the output signals acquired by the acquisition unit 74 (Sa02).

[0083]

[0061] The reference conditions include first to fourth reference conditions, and the third control unit 73 determines that the reference conditions are met when any of the first to fourth reference conditions is met. The first reference condition is that the motorcycle 10 is stopped and a predetermined time has passed since the key switch of the motorcycle 10 was turned on. The second reference condition is that the motorcycle 10 is stopped and the gradient of the road surface on which the motorcycle 10 is stopped exceeds a reference value. The third condition is that the braking force required by the rider exceeds the frictional braking force generated by the front wheel friction imparting device 40. The fourth condition is that the braking force required by the rider exceeds the sum of the friction braking force generated by the front wheel friction applying device 40 and the regenerative braking force generated by the regenerative braking device 51.

[0084]

[0062] The third control unit 73 determines whether the motorcycle 10 is stopped or not based on the output signal of either or both of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91. The third control unit 73 also obtains the elapsed time since the key switch was turned on based on the output signal of the key switch sensor 96, and determines whether a predetermined time has elapsed since the key switch was turned on. The third control unit 73 also determines whether the gradient of the road surface exceeds a reference value based on the output signal of the road surface gradient sensor 95. The third control unit 73 also obtains the required braking force based on the output signal of the first hydraulic pressure sensor 82, obtains the frictional braking force generated by the front wheel friction imparting device 40 based on the output signal of the second hydraulic pressure sensor 83, and determines whether the braking force required by the rider exceeds the frictional braking force generated by the front wheel friction imparting device 40. The third control unit 73 also obtains the required braking force based on the output signal of the first hydraulic pressure sensor 82, obtains the frictional braking force generated by the front wheel friction imparting device 40 based on the output signal of the second hydraulic pressure sensor 83, and obtains information related to the regenerative braking force from the power control device 6b, and determines whether the braking force required by the rider exceeds the sum of the frictional braking force generated by the front wheel friction imparting device 40 and the regenerative braking force generated by the regenerative braking device 51. The third control unit 73 may determine the stopped state based on the output signal of either the front wheel rotation speed sensor 81 or the rear wheel rotation speed sensor 91. The third control unit 73 may also determine the stopped state based on the output signal of a sensor other than the front wheel rotation speed sensor 81 or the rear wheel rotation speed sensor 91 (for example, a vehicle speed sensor, an inertial force sensor, etc.). In the third and fourth reference conditions, the braking force required by the rider may correspond to the braking force allocated by the first control unit 71 to the front wheel friction imparting device 40 and the regenerative braking device 51 when the above-mentioned linked brake control operation is being executed.

[0085]

[0063] If the third control unit 73 determines in step S a02 that the reference condition is met, it controls the actuator 55 to move the spindle 54 of the rear wheel side friction imparting device 52 in the first direction and press the friction materials 53 a, 53 b against the disc rotor 4 a of the rear wheel 4, thereby applying a friction braking force to the rear wheel 4 to brake it (S a03). As a result, if a predetermined time has not elapsed since the key switch was turned to ON and the motorcycle 10 is stopped, if the motorcycle 10 is stopped on a slope with a gradient that exceeds the above-mentioned reference value, if the braking force required by the rider exceeds the friction braking force provided by the front wheel friction providing device 40, or if the braking force required exceeds the sum of the friction braking force provided by the front wheel friction providing device 40 and the regenerative braking force provided by the regenerative braking device 51, then the rear wheel friction providing device 52 applies a friction braking force to the rear wheel 4.

[0086]

[0064] After the third control unit 73 starts applying frictional braking force by the rear wheel friction application device 52 in step Sa03, it executes a release standby process in which it waits while maintaining braking control of the rear wheels 4 until a release condition is met (Sa04). In the release standby process, the acquisition unit 74 acquires the output signal of the operation means sensor 94. Thereafter, the third control unit 73 determines whether the operation means 12 has been operated based on the output signal of the operation means sensor 94. Furthermore, if the first reference condition is met, the third control unit 73 determines whether a predetermined time has elapsed since the key switch was turned on. Then, if it is determined that the operating means 12 has been operated, or if it is determined that a predetermined time has elapsed since the key switch was turned on, it is determined that the release condition has been met (S a 0 5).

[0087]

[0065] If it is determined that the release condition is not met (Sa05:N), the release standby process continues (Sa04), and the rear wheel side friction imparting device 52 is controlled to maintain braking of the rear wheel 4. On the other hand, if it is determined that the release condition is met (Sa05:Y), the actuator 55 is controlled to move the spindle 54 of the rear wheel side friction imparting device 52 in the second direction, and the friction materials 53a, 53b of the rear wheel side friction imparting device 52 are moved away from the disc rotor 4a of the rear wheel 4, thereby ending the application of friction braking force to the rear wheel 4 (Sa06).

[0088]

[0066] As described above, when the first standard condition is met, i.e., before a predetermined time has elapsed since the key switch of the motorcycle 10 was turned ON and the motorcycle is stopped, the third control unit 73 applies a frictional braking force to the rear wheel 4 using the rear wheel friction applying device 52, thereby making it possible to suppress the movement of the motorcycle 10, for example, during a period when the rider is preparing to board the motorcycle 10.

[0089]

[0067] Furthermore, when the second standard condition is met, that is, when the motorcycle 10 is stopped on a road surface with a gradient exceeding the standard value, the third control unit 73 applies a frictional braking force to the rear wheel 4 by the rear wheel friction applying device 52. Therefore, for example, when the motorcycle 10 is stopped on a slope, it is possible to prevent the motorcycle 10 from sliding downhill.

[0090]

[0068] Furthermore, when the third standard condition is met, that is, when the braking force required by the rider exceeds the frictional braking force provided by the front wheel friction providing device 40, the third control unit 73 applies frictional braking force to the rear wheel 4 through the rear wheel friction providing device 52. Therefore, for example, when an abnormality occurs in the front wheel braking unit 20 and the frictional braking force provided by the front wheel friction providing device 40 cannot reach the required braking force, the motorcycle 10 can be decelerated and stopped, thereby improving safety when braking the motorcycle 10.

[0091]

[0069] Furthermore, when the fourth reference condition is met, that is, when the braking force required by the rider exceeds the sum of the frictional braking force provided by the front wheel-side friction imparting device 40 and the regenerative braking force provided by the regenerative braking device 51, the third control unit 73 applies a frictional braking force to the rear wheel 4 by the rear wheel-side friction imparting device 52. Therefore, for example, when an abnormality occurs in the front wheel braking unit 20 and the motorcycle 10 is in a low-speed state, and the sum of the frictional braking force provided by the front wheel-side friction imparting device 40 and the regenerative braking force provided by the regenerative braking device 51 is insufficient for the required braking force, or when an abnormality occurs in the front wheel braking unit 20 and the available capacity of the power storage device 6a is insufficient to generate regenerative braking force, and the frictional braking force provided by the front wheel-side friction imparting device 40 and the regenerative braking force provided by the regenerative braking device 51 is insufficient for the required braking force, In cases where the sum of the regenerative braking forces by I is insufficient for the required braking force, the motorcycle 10 can be decelerated and stopped, thereby improving safety when braking the motorcycle 10.

[0092] [ 0 0 7 0 ]

[0093] <Effects of the Brake System> Conventionally, brake systems for saddle-riding vehicles have been configured to include, for example, a hydraulic brake that applies frictional braking force to a wheel in response to the rider's operation of a brake lever, and a regenerative brake that applies regenerative braking force to the wheel by causing the motor that drives the wheel to function as a generator. In brake systems configured in this way, the regenerative brake brakes the wheel by causing the motor to function as a generator using the rotational force of the wheel. Therefore, for example, if the rotational speed of the wheel is slow, the braking force of the regenerative brake may decrease, or if the vehicle's battery or the like has no free capacity to store power and the motor cannot function as a generator, the regenerative braking force may not be generated. In such cases, there is a risk that the braking force of the saddle-riding vehicle may be insufficient, thereby reducing safety.

[0094]

[0071] In contrast to this, the brake system 1 of the motorcycle 10 as a saddle-ride type vehicle of this embodiment. The motorcycle 10 includes a front wheel braking unit 20 that brakes a front wheel 3 of the motorcycle 10, and a rear wheel braking unit 50 that brakes a rear wheel 4 of the motorcycle 10. The front wheel braking unit 20 includes a front wheel side friction applying device 40 that applies friction braking force to the front wheel 3 according to the hydraulic pressure of the brake fluid generated in the master cylinder 22 and supplied to the wheel cylinder 25 in response to the movement of an operating element 11 operated by the rider, thereby braking the front wheel 3. The rear wheel braking unit 50 includes a regenerative braking device 51 that causes an electric motor 5 to function as a generator using the rotational force of the rear wheel 4 to generate regenerative braking force on the rear wheel 4 to brake the rear wheel 4. The rear wheel braking unit 50 further includes a friction applying device 40 that applies friction braking force to the rear wheel 4 by moving friction materials 53a, 53b. The friction applying device 52 includes a rear wheel side friction applying device 52 that applies a braking force to the rear wheel side friction applying device 52, and an actuator 55 that is unitized with the rear wheel side friction applying device 52 and moves the friction materials 53a and 53b.

[0095]

[0072] According to this configuration, in the brake system 100, the front wheel braking unit 20 includes the front wheel side friction imparting device 40, the rear wheel braking unit 50 includes the regenerative braking device 51, and further, the rear wheel braking unit 50 includes the rear wheel side friction imparting device 52 that moves the friction materials 53a, 53b to impart friction braking force to the rear wheel 4 to brake it, and the actuator 55 that is united with the rear wheel side friction imparting device 52 and moves the friction materials 53a, 53b. Therefore, during normal braking, braking force can be generated by the front wheel side friction imparting device 40 and the regenerative braking device 51, and when the regenerative braking force of the regenerative braking device 51 decreases (for example, when the motorcycle 10 is running The braking performance of the motorcycle 10 is reduced when the speed is relatively low and the rotational force of the electric motor 5 is low, or when the free capacity of the power storage device 6a is small and the generation of regenerative torque by the electric motor 5 is limited, or when the regenerative braking force cannot be generated by the regenerative braking device 51 (for example, when the motorcycle 10 is stopped, or when the free capacity of the power storage device 6a is almost zero and the electric motor 5 cannot generate regenerative torque, or when a malfunction occurs in the regenerative braking device 51), or when the friction braking force generated by the front wheel friction imparting device 40 is insufficient for the braking force required in response to the movement of the rider's operating element 1! (for example, when a malfunction occurs in the hydraulic pressure control unit 30 of the front wheel braking section 20 and / or the front wheel friction imparting device 40), etc. If there is a risk that the motorcycle 10 may not be able to slow down or stop, and the safety of the motorcycle 10 may be compromised, the actuator 55, which is united with the rear wheel friction applying device 52, can be operated to apply frictional braking force to the rear wheel 4, thereby slowing down and / or stopping the motorcycle 10. This improves the safety of the motorcycle 10 when braking.

[0096]

[0073] The brake system 100 of this embodiment is configured to include a front wheel braking section 20 including a front wheel friction imparting device 40, and a rear wheel braking section 50 including a rear wheel friction imparting device 52 unitized with a regenerative braking device 51 and an actuator 55. The brake system 100 is also configured to include a control device 70 that controls the friction braking force applied by the rear wheel friction imparting device 52. When it is determined during the stop assist control operation that the required braking force, which is the braking force requested by the rider based on the movement of the operating element 11, exceeds the friction braking force applied by the front wheel friction imparting device 40 (Sa02), the control device 70 generates or increases the friction braking force applied by the rear wheel friction imparting device 52.

[0097]

[0074] With this configuration, by executing the stop assist control operation, for example, when a malfunction occurs in the hydraulic control unit 30 of the front wheel braking section 20 or the front wheel side friction imparting device 40, and the motorcycle 10 is in a state where the rider's requested braking force cannot be applied to the front wheel 3, and it is determined that the rider's requested braking force exceeds the friction braking force applied by the front wheel side friction imparting device 40, the control device 70 can generate or increase the friction braking force applied by the rear wheel side friction imparting device 52 to decelerate and stop the motorcycle 10. This improves safety during braking of the motorcycle 10.

[0098]

[0075] The brake system 100 of this embodiment is configured to include a front wheel braking section 20 including a front wheel friction imparting device 40, and a rear wheel braking section 50 including a rear wheel friction imparting device 52 unitized with a regenerative braking device 51 and an actuator 55. The brake system 100 is also configured to include a control device 70 that controls the friction braking force applied by the rear wheel friction imparting device 52. When it is determined during the stop assist control operation that the required braking force, which is the braking force requested by the rider based on the movement of the operating element 11, exceeds the sum of the friction braking force applied by the front wheel friction imparting device 40 and the regenerative braking force applied by the regenerative braking device 51 (S a02), the control device 70 generates or increases the friction braking force applied by the rear wheel friction imparting device 52.

[0099]

[0076] With this configuration, by executing the stop assist control operation, the control device 70 can decelerate and stop the motorcycle 10 by generating or increasing the frictional braking force by the rear wheel friction imparting device 52, for example, when the motorcycle 10 is stopped or traveling at a low speed and is limited in generating regenerative braking force by the regenerative braking device 51, or when the hydraulic control unit 30 of the front wheel braking unit 20 or the front wheel friction imparting device 40 has a malfunction and the motorcycle 10 is unable to impart the rider's requested braking force to the front wheel 3, and it is determined that the rider's requested braking force exceeds the sum of the frictional braking force by the front wheel friction imparting device 40 and the regenerative braking force by the regenerative braking device 51. This improves safety when braking the motorcycle 10.

[0100]

[0077] The brake system 100 of this embodiment is configured to include a front wheel braking section 20 including a front wheel friction imparting device 40, and a rear wheel braking section 50 including a rear wheel friction imparting device 52 unitized with a regenerative braking device 51 and an actuator 55. The brake system 100 is also configured to include a control device 70 that controls the friction braking force applied by the rear wheel friction imparting device 52, and the control device 70 is configured to control the generation or increase of the friction braking force applied by the rear wheel friction imparting device 52 when it is determined that the motorcycle 10 is in a stopped state (Sa02) during the stopping assistance control operation.

[0101]

[0078] With this configuration, the control device 70 executes the stopping assistance control operation to generate or increase the friction braking force of the rear wheel friction imparting device 52 when the motorcycle 10 is stopped, thereby maintaining the motorcycle 10 in a stopped state. Therefore, for example, when starting the motorcycle 10 on an uphill road, it is possible to prevent the motorcycle 10 from moving unintentionally by the rider, thereby improving the safety of the motorcycle 10.

[0102]

[0079] The brake system 100 of this embodiment is configured to include a front wheel braking unit 20 including a front wheel friction imparting device 40, and a rear wheel braking unit 50 including a rear wheel friction imparting device 52 unitized with a regenerative braking device 51 and an actuator 55. The brake system 100 is also configured to include a control device 70 that controls the friction braking force applied by the rear wheel friction imparting device 52. In a stop assist control operation, when the motorcycle 10 is in a stopped state and it is determined that the road gradient exceeds a reference value (S a02), the control device 70 controls the friction braking force applied by the rear wheel friction imparting device 52 to generate or increase the friction braking force.

[0103]

[0080] With this configuration, the control device 70 executes the stop assist control operation to generate or increase the friction braking force of the rear wheel-side friction imparting device 52 when the motorcycle 10 is stopped and the road gradient exceeds a reference value. Therefore, for example, when the motorcycle 10 is started on an uphill road, in which the motorcycle 10 is more likely to move unintentionally by the rider, the movement of the motorcycle 10 can be suppressed, and the safety of the motorcycle 10 can be improved.

[0104]

[0081] The brake system 100 of this embodiment is configured to include a front wheel braking section 20 including a front wheel friction imparting device 40, and a rear wheel braking section 50 including a rear wheel friction imparting device 52 unitized with a regenerative braking device 51 and an actuator 55. The brake system 100 is also configured to include a brake pedal as an operating means 12 operated by a rider, which is different from the operating element 11. The control device 70 is configured to reduce or not generate friction braking force by the rear wheel friction imparting device 52 when it is determined that the operating means 12 has been operated during the stop assist control operation.

[0105]

[0082] With this configuration, the application of friction braking force to the rear wheel 4 by the rear wheel side friction application device 52, which is controlled by the stopping assistance control operation, can be reduced or stopped at the timing intended by the rider.

[0106]

[0083] The brake system 100 of this embodiment includes a rear wheel side friction imparting device 52 unitized with an actuator 55. The rear wheel side friction imparting device 52 is configured to impart frictional braking force to the rear wheel 4 by moving friction materials 53a, 53b in accordance with the movement of a spindle 54, which is moved by an actuator 55 controlled by a control device 70. When increasing the frictional braking force imparted to the rear wheel 4, the friction materials 53a, 53b are moved in a direction pressed against the rear wheel 4 in accordance with the movement of the spindle 54 in a first direction. When decreasing the frictional braking force, the friction materials 53a, 53b are moved in a direction away from the rear wheel 4 in accordance with the movement of the spindle 54 in a second direction opposite to the first direction.

[0107]

[0084] With this configuration, the brake system 100 can increase and decrease the frictional braking force applied to the rear wheel 4 by the rear wheel-side friction application device 52 regardless of the movement of the operating element 11. Furthermore, the rear wheel-side friction application device 52 is configured to increase and decrease the frictional braking force by controlling the actuator 55 with the control device 70, and is configured to generate frictional braking force only on the rear wheel 4. This makes it possible to further narrow the area for arranging the wiring connecting the control device 70 and the actuator 55, and to control the frictional braking force of the rear wheel 4 without using hydraulic pressure, thereby improving the mountability of the brake system 100 on the motorcycle 10 and improving safety.

[0108]

[0085] The brake system 100 of this embodiment is configured to include a front wheel braking unit 20 including a front wheel friction imparting device 40, and a rear wheel braking unit 50 including a rear wheel friction imparting device 52 unitized with a regenerative braking device 51 and an actuator 55, and is configured to include a single operating element 11 that is common to the front wheel braking unit 20 and the rear wheel braking unit 50. With this configuration, braking forces are generated by the front wheel braking unit 20 and the rear wheel braking unit 50 by operating the single operating element 11, thereby simplifying operation by the rider.

[0109]

[0086] The brake system 100 of this embodiment is configured to include one operator 11 as an operator operated by a rider. With this configuration, the operability of the brake system 100 by the rider can be improved.

[0110]

[0087] The brake system 100 of this embodiment is configured to include an operator 11 that is operated by the rider's hand. This configuration makes it easier for the rider to fine-tune the operation of the operator 11, thereby improving the operability of the brake system 100.

[0111]

[0088] The motorcycle 10 of this embodiment is configured to include the above-described brake system 100. With this configuration, the motorcycle 10 achieves the same effects as the above-described brake system 100.

[0112]

[0089] In this embodiment, the brake system 100 is configured to have one operator 11 common to the front wheel braking unit 20 and the rear wheel braking unit 50. However, the brake system 100 may also include a first operator and a second operator different from the first operator, with the front wheel braking unit 20 operated by the first operator and the rear wheel braking unit 50 operated by the second operator. With this configuration, the braking forces of the front wheel braking unit 20 and the rear wheel braking unit 50 can be adjusted based on the operation states of the first and second operators by the rider.

[0113] Although the brake system according to the embodiment has been described above, the brake system according to the present invention is not limited to the description of the embodiment. For example, only a part of the embodiment may be implemented.

[0114] [Explanation of symbols]

[0115] [ 0 0 9 1 ]

[0116] 1 fuselage, 2 non-dollar, 3 front wheel, 4 rear wheel, 5 electric motor, 6 power supply unit, 6a power storage device, 6b power control device, 1〇 motorcycle, 11 operator, 12 operating means, 2〇 front wheel braking section, 22 master cylinder, 23 reservoir, 24 fluid path, 25 wheel cylinder, 3〇 hydraulic pressure control unit, 3! base, 32 inlet valve, 33 release valve, 34 accumulator, 35 pump, 36 motor, 37 housing, 38 switching valve, 39 pressure booster valve, 4〇 front wheel side friction imparting device, 5〇 rear wheel braking section, 51 regenerative braking device, 52 rear wheel side friction imparting device, 53 Friction material, 54 Spindle, 55 Actuator, 70 Control device, 71 First control unit, 72 Second control unit, 73 Third control unit, 74 Acquisition unit, 8! Front wheel rotation speed sensor, 82 First hydraulic pressure sensor, 83 Second hydraulic pressure sensor, 91 Rear wheel rotation speed sensor, 92 Remaining battery level sensor, 93 Friction material movement sensor, 94 Operation means sensor, 95 Road surface gradient sensor, 96 Key switch sensor, 100 Brake system

Claims

[Document name] Scope of claims

1. A brake system (100) for a saddle riding type vehicle (10) having at least one operating element (11) operated by a rider, comprising: a front wheel braking section (20) for braking a front wheel (3) of the saddle riding type vehicle (10); and a rear wheel braking section (50) for braking a rear wheel (4) of the saddle riding type vehicle (10), wherein the front wheel braking section (20) comprises a front wheel side friction imparting device (40) for applying a friction braking force corresponding to a hydraulic pressure of brake fluid generated in response to at least the movement of the operating element (11) to the front wheel (3) to brake the front wheel (3), and the rear wheel braking section (50) comprises a regenerative braking device (51) for generating a regenerative braking force in the rear wheel (4) to brake the rear wheel (4), and the rear wheel braking section (50) further comprises: A brake system (100) including: a rear-wheel-side friction applying device (52) that applies a friction braking force to the rear wheel (4) by moving a friction material (53 a, 53 b) and applies braking force to the rear wheel (4); and an actuator (55) that is unitized with the rear-wheel-side friction applying device (52) and moves the friction material (53 a, 53 b).

2. The brake system (100) includes a control device (70) that controls the frictional braking force applied by the rear wheel side friction application device (52), and the control device (70) performs control to generate or increase the frictional braking force applied by the rear wheel side friction application device (52) when it is determined that the braking force requested by the rider based on the movement of the operating element (11) exceeds the frictional braking force applied by the front wheel side friction application device (40). The brake system according to claim 1.

3. The brake system (100) includes a control device (70) that controls the frictional braking force applied by the rear wheel side friction application device (52), and the control device (70) performs control to generate or increase the frictional braking force applied by the rear wheel side friction application device (52) when it is determined that the braking force requested by the rider based on the movement of the operating element (11) exceeds the sum of the frictional braking force applied by the front wheel side friction application device (40) and the regenerative braking force applied by the regenerative braking device (51). The brake system according to claim 1.

4. The brake system (100) includes a control device (70) that controls the frictional braking force applied by the rear wheel side friction application device (52), and the control device (70) performs control to generate or increase the frictional braking force applied by the rear wheel side friction application device (52) when the saddle riding type vehicle (10) is in a stopped state. The brake system described in any one of claims 1 to 3.

5. A brake system (10) as described in claim 4, wherein the control device (70) performs control to generate or increase a friction braking force by the rear wheel side friction imparting device (52) when the road surface gradient exceeds a reference value.

6. The brake system (100) comprises:

5. The brake system according to claim 4, further comprising an operating means (7) that is different from the operating element (11) and is operated by a rider, and the control device (70) controls the rear wheel-side friction application device (52) to reduce or not apply a friction braking force when the operating means (7) is operated. [Claim ?] The brake system according to any one of claims 1 to 3, wherein the rear wheel side friction imparting device (52) is provided with a spindle (54) which is moved by the actuator (55) to move the friction material (53a, 53b), and when increasing the friction braking force, the friction material (53a, 53b) is moved in a direction pressed against the front wheel (3) in response to movement of the spindle (54) in a first direction by the actuator (55), and when decreasing the friction braking force, the friction material (53a, 53b) is moved in a direction away from the front wheel (3) in response to movement of the spindle (54) in a second direction opposite to the first direction.

8. A brake system as claimed in any one of claims 1 to 3, wherein the operating element (11) is a common operating element for the front wheel braking unit (20) and the rear wheel braking unit (40).

9. A brake system as described in claim 8, wherein the operating element (11) is one.

10. A brake system described in any one of claims 1 to 3, wherein the operator (11) is an operator operated by the rider's hand.

11. The brake system includes a first operator as the operator, and a second operator as the operator that is different from the first operator, the front wheel braking unit (20) is operated by the first operator, and the rear wheel braking unit (50) is operated by the second operator. A brake system as described in any one of claims 1 to 3.

12. A saddle-type vehicle equipped with a brake system (100) according to any one of claims 1 to 3.

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