Braking system and ride-on vehicle

Abstract

An object is to provide a brake system for a ride vehicle that can improve safety. A brake system (100) includes a front wheel brake portion (20) that brakes a front wheel (3), and a rear wheel brake portion (50) that brakes a rear wheel (4). The front wheel brake portion (20) includes a front wheel side friction force application device (40) that applies a friction braking force to the front wheel (3) to brake in response to movement of an operation member (11). The rear wheel brake portion (50) includes a regenerative braking device (51) that generates a regenerative braking force to brake the rear wheel (4). The brake system also includes a rear wheel side friction force application device (52) that moves a friction member (53a, 53b) to apply a friction braking force to the rear wheel (4) to brake, and an actuator (55) that is unitized with the rear wheel side friction force application device (52) and moves the friction member (53a, 53b).

Description

Technical Field

[0001] This invention relates to a braking system for a riding vehicle and a riding vehicle equipped with the braking system. Background Technology

[0002] Conventionally, braking systems for riding vehicles include friction brakes that apply frictional braking force to the wheels in response to the operation of the brake lever by the rider, and regenerative brakes that apply regenerative braking force to the wheels by enabling the motor that drives the wheels to function as a generator (see, for example, Patent Document 1).

[0003] Existing technical documents Patent documents Patent document 1: Japanese Patent Application Publication No. 2023-149798. Summary of the Invention

[0004] The problem that the invention aims to solve In a braking system with the structure described in Patent Document 1, since the regenerative brake is a structure that uses the rotation of the wheel to enable the motor to function as a generator to brake the wheel, there are situations where, for example, the regenerative braking force decreases when the wheel's rotation decreases, or the idle capacity of the battery or other power stored in the vehicle is insufficient to enable the motor to function as a generator and thus fail to generate regenerative braking force. In such cases, the braking force of the riding vehicle may be insufficient, resulting in a decrease in safety.

[0005] The present invention was made in light of the aforementioned issues, and its purpose is to provide a braking system for a riding vehicle that can improve safety.

[0006] Methods for solving problems The braking system of the present invention is a braking system for a riding vehicle having at least one operating element operated by a rider, and has the following structure: a front wheel brake unit for braking the front wheel of the riding vehicle; and a rear wheel brake unit for braking the rear wheel of the riding vehicle; the front wheel brake unit includes at least a front wheel side friction-applying device for braking by applying a friction braking force to the front wheel in accordance with the hydraulic pressure of the brake fluid generated by the movement of the operating element; the rear wheel brake unit includes a regenerative braking device for braking by generating a regenerative braking force on the rear wheel; the rear wheel brake unit further includes a rear wheel side friction-applying device for braking by moving a friction element to apply a friction braking force to the rear wheel, and an actuator that is unitized together with the rear wheel side friction-applying device and moves the friction element.

[0007] Based on this structure, the braking system comprises a front wheel brake unit including a front wheel side friction-improving device, a rear wheel brake unit including a regenerative braking device, and a rear wheel brake unit further including a rear wheel side friction-improving device and an actuator modularized together with the rear wheel side friction-improving device. Therefore, under normal circumstances, braking force can be generated by the front wheel side friction-improving device and the regenerative braking device. On the other hand, in situations such as a decrease in regenerative braking force due to the regenerative braking device, the inability to generate regenerative braking force by the regenerative braking device, or insufficient friction braking force from the front wheel side friction-improving device due to malfunction, the rear wheel side friction-improving device can be activated by the actuator modularized together with it to generate friction braking force on the rear wheel, thereby decelerating and stopping the vehicle. This improves the safety of the vehicle.

[0008] The riding vehicle according to the present invention has a structure equipped with the above-described braking system. Based on this structure, it achieves the same effect as the braking system described above.

[0009] The riding vehicle involved in this invention has a structure that includes the above-described braking system. Attached Figure Description

[0010] Figure 1 This is a diagram used to illustrate the riding-type vehicle involved in the implementation method.

[0011] Figure 2 This is a diagram used to illustrate the braking system.

[0012] Figure 3 This is a diagram used to illustrate the hydraulic control unit.

[0013] Figure 4 This diagram illustrates the rear wheel side friction application device and actuator.

[0014] Figure 5 This is a diagram used to illustrate the control device.

[0015] Figure 6 This is a diagram illustrating the process of applying control actions to the rear wheel friction performed by the control device. Detailed Implementation

[0016] The braking system according to the present invention and examples of embodiments of riding vehicles equipped with the braking system will be described using the accompanying drawings. In this embodiment, an example of a motorized two-wheeled vehicle equipped with the braking system will be described; however, the braking system according to the present invention can also be equipped with other riding vehicles besides motorized two-wheeled vehicles. Riding vehicles refer to all means of transportation that a rider straddles. Examples of riding vehicles include motorcycles, buggies, and bicycles. Motorcycles include motorized two-wheeled vehicles and motorized tricycles that use an engine or electric motor as a propulsion source, such as motorized bicycles, scooters, and electric scooters. Furthermore, bicycles refer to all means of transportation that can be propelled by the pedal force applied by the rider. Bicycles include ordinary bicycles, electric-assisted bicycles, and electric bicycles.

[0017] The structures and operations described in this embodiment are examples, and the braking system and riding vehicle involved in this invention are not limited to such structures and operations. Furthermore, in the figures, there are instances where the same or similar parts or components are given the same reference numerals, or instances where reference numerals are omitted. Additionally, regarding the construction of detailed parts, descriptions and illustrations have been appropriately simplified or omitted. Furthermore, there are instances where repetitive or similar descriptions have been appropriately simplified or omitted.

[0018] <Implementation Method> The following is based on Figures 1-6 The present invention describes the braking system and an embodiment of a riding vehicle equipped with the braking system.

[0019] Figure 1 This is a diagram used to illustrate the riding-type vehicle involved in the implementation method. Figure 2 This is a diagram used to illustrate the braking system. Figure 3 This is a diagram used to illustrate the hydraulic control unit. Figure 4 This diagram illustrates the rear wheel side friction application device and actuator. Figure 5 This is a diagram used to illustrate the control device. Figure 6 This is a diagram illustrating the process of applying control actions to the rear wheel friction performed by the control device.

[0020] <About rideable vehicles> like Figure 1 and Figure 2As shown, the motorized two-wheeled vehicle 10, which is a riding vehicle, includes a body 1, a handlebar 2 that is held by the body 1 for turning freely, a front wheel 3 that is held by the body 1 for turning freely together with the handlebar 2, a rear wheel 4 that is held by the body 1 for rotating freely, an electric motor 5 that serves as a drive source for driving the rear wheel 4, an electric power unit 6 that supplies power to the electric motor 5, and a braking system 100 that brakes the front wheel 3 and the rear wheel 4.

[0021] The electric motor 5 is an electric motor (e.g., an AC motor, a brushless DC motor, a synchronous motor, an induction motor, a hub motor, etc.) that can receive power from the power unit 6 to drive the rear wheel 4. In addition, the electric motor 5 can also function as a generator, generating regenerative torque to brake the rear wheel 4 as described later.

[0022] The power unit 6 includes an energy storage device 6a (e.g., a battery, capacitor, etc.) capable of temporarily storing input power and supplying the stored power to the motor 5, and an energy control device 6b controlling the power used to charge the energy storage device 6a and the power supplied from the energy storage device 6a to the motor 5.

[0023] The braking system 100 is a system that, as described later, has an operating element 11 that is operated by the rider of the motorized two-wheeled vehicle 10 and controls the braking of the motorized two-wheeled vehicle 10.

[0024] <About the braking system> like Figure 1 and Figure 2 As shown, the braking system 100 includes an operating member 11, an operating mechanism 12, a front wheel brake unit 20 for braking the front wheel 3, a rear wheel brake unit 50 for braking the rear wheel 4, and a control device 70 for controlling the braking of the front wheel 3 and the rear wheel 4.

[0025] The operating element 11 is configured as a brake lever mounted on the handlebars 2, operated by the rider's hand. Furthermore, the operating element 11 is connected to a master cylinder 22 that generates hydraulic pressure to produce brake fluid corresponding to the movement of the operating element 11, and the operating element 11 is hydraulically connected to the front wheel brake unit 20. Additionally, the operating mechanism 12 is configured as a brake pedal mounted on the frame 1, operated by the rider's foot.

[0026] In this embodiment, the braking system 100 has a structure that includes an operating member 11 operated by the rider's hand. However, the braking system may also have an operating member operated by something other than the rider's hand, such as the rider's foot. Furthermore, the braking system 100 may also have a structure that includes multiple operating members, for example, it may have a first operating member corresponding to the front wheel brake 20 and a second operating member corresponding to the rear wheel brake 50.

[0027] <Regarding the front wheel brakes> like Figure 2 As shown, the front wheel brake unit 20 includes a master cylinder 22, a reservoir 23, a hydraulic circuit 24, a hydraulic control unit 30, and a front wheel side friction imparting device 40.

[0028] The master cylinder 22 is connected to the operating member 11 as described above, and its movement is transmitted to the operating member 11, generating hydraulic pressure on the brake fluid corresponding to the movement of the operating member 11. Furthermore, the master cylinder 22 is connected to the wheel cylinder 25 built into the front wheel side friction-generating device 40 via a brake fluid-filled fluid passage 24, through which a hydraulic control unit 30 is connected. Additionally, the master cylinder 22 is connected to a brake fluid reservoir 23, which is attached to the master cylinder 22.

[0029] The hydraulic passage 24 is filled with brake fluid and includes a brake fluid pipe 24a connecting the master cylinder 22 to the hydraulic control unit 30, a brake fluid pipe 24b connecting the hydraulic control unit 30 to the wheel cylinder 25, and internal flow passages 24c to 24e formed inside the hydraulic control unit 30.

[0030] The front wheel friction-applying device 40 applies friction force to the front wheel 3 by pushing the friction element (not shown) held by the vehicle body 1 against the disc rotor 3a that rotates together with the front wheel 3, corresponding to the increase in the hydraulic pressure of the brake fluid in the wheel cylinder 25. This generates or increases the friction braking force on the front wheel 3, thereby braking it. Alternatively, the front wheel friction-applying device 40 can have other structures, such as a structure in which the friction element of the brake shoe held by the vehicle body 1 is pushed against the brake drum that rotates together with the front wheel 3 to generate a friction braking force corresponding to the amount of operation of the operating member 11.

[0031] like Figure 2 and Figure 3 As shown, the hydraulic control unit 30 includes a base 31. Within this base 31, a master cylinder port MP connecting to the brake fluid line 24a, a wheel cylinder port WP connecting to the brake fluid line 24b, a main hydraulic passage 24c forming part of the hydraulic passage 24 and connecting the master cylinder port MP and the wheel cylinder port WP, and a secondary hydraulic passage 24d forming part of the hydraulic passage 24 and bypassing the main hydraulic passage 24c.

[0032] A filling valve 32 is installed in the main fluid passage 24c. The auxiliary fluid passage 24d connects the area of ​​the filling valve 32 in the main fluid passage 24c near the main cylinder port MP to the area of ​​the filling valve 32 in the main fluid passage 24c near the wheel cylinder port WP. At both ends of the auxiliary fluid passage 24d, the side connected to the area near the wheel cylinder port WP in the main fluid passage 24c is designated as the upstream side. Starting from the upstream side, the auxiliary fluid passage 24d is sequentially equipped with a release valve 33, a reservoir 34, and a pump 35.

[0033] Furthermore, a booster fluid path 24e is formed as an internal flow path in the base 31. The booster fluid path 24e connects the region of the main fluid path 24c near the main cylinder port MP where the main fluid path 24c merges with the downstream end of the auxiliary fluid path 24d, and the region between the reservoir 34 and the pump 35 in the auxiliary fluid path 24d. A switching valve 38 is provided between the merging section of the main fluid path 24c with the booster fluid path 24e and the merging section with the downstream end of the auxiliary fluid path 24d, and a booster valve 39 is provided along the booster fluid path 24e.

[0034] The filler valve 32 and the switching valve 38 are, for example, solenoid valves that, when controlled by the control device 70 to be in a de-energized state, are in an open state that allows brake fluid to flow, and when controlled to be energized, are in a closed state that cuts off the flow of brake fluid. The release valve 33 and the booster valve 39 are, for example, solenoid valves that, when controlled by the control device 70 to be in a de-energized state, are in a closed state that cuts off the flow of brake fluid, and when controlled to be energized, are in an open state that allows the flow of brake fluid. The energized and de-energized states of the filler valve 32, the release valve 33, the switching valve 38, and the booster valve 39 are controlled by the control device 70, which will be described later.

[0035] When the release valve 32 is open, the accumulator 34 temporarily stores the brake fluid discharged from the wheel cylinder 25.

[0036] Pump 35 is driven by motor 36, causing brake fluid stored in reservoir 34 to move to the region in main hydraulic line 24c closer to the master cylinder port MP than fill valve 32. Furthermore, with fill valve 32 and booster valve 39 open, brake fluid stored in reservoir 23 can move to the region in main hydraulic line 24c closer to the master cylinder port MP than fill valve 32, thereby increasing the hydraulic pressure on wheel cylinder 25. The driving state of motor 36 is controlled by control device 70.

[0037] The filling valve 32, release valve 33, reservoir 34, pump 35, motor 36, switching valve 38, and booster valve 39 are assembled in the base 31. In addition, the filling valve 32, release valve 33, reservoir 34, pump 35, motor 36, switching valve 38, and control device 70 are housed inside the housing 37 mounted in the base 31.

[0038] The hydraulic control unit 30 includes a first hydraulic sensor 82 for detecting the hydraulic pressure of the brake fluid in the region on the master cylinder 22 side of the main hydraulic passage 24c, and a second hydraulic sensor 83 for detecting the hydraulic pressure of the brake fluid in the region on the wheel cylinder 25 side of the main hydraulic passage 24c. Alternatively, the hydraulic control unit 30 may also have a structure that includes sensors for detecting other physical quantities that can be substantially converted into the hydraulic pressure of the brake fluid in the master cylinder 22 and wheel cylinder 25. Furthermore, it may have a structure that includes only one of the first hydraulic sensor 82 and the second hydraulic sensor 83. Additionally, it may be a structure in which one or both of the hydraulic pressure of the brake fluid in the region on the master cylinder 22 or the main hydraulic passage 24c, and the hydraulic pressure of the brake fluid in the region on the wheel cylinder 25 or the main hydraulic passage 24c are estimated based on other physical quantities that can be substantially converted into them.

[0039] As described above, the hydraulic control unit 30 includes internal flow paths 24c to 24e, a filling valve 32, a release valve 33, a reservoir 34, a pump 35, a motor 36, a switching valve 38, and a booster valve 39. The operation of the filling valve 32, the release valve 33, the motor 36, the switching valve 38, and the booster valve 39 is controlled by the control device 70 described later, which can control the hydraulic pressure of the brake fluid supplied to the wheel cylinder 25.

[0040] <Regarding the rear wheel brake> like Figure 2 As shown, the rear wheel braking unit 50 includes a regenerative braking device 51, a rear wheel side friction imparting device 52, and an actuator 55.

[0041] The regenerative braking device 51 generates regenerative braking force on the rear wheel 4 for braking. 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 storage device 6a and a power control device 6b. The power control device 6b enables the electric motor 5 to function as a generator, generating a regenerative torque in the opposite direction to the rotation of the rear wheel 4. This regenerative torque is then applied to the rear wheel 4 as a regenerative braking force, braking the rear wheel 4. Furthermore, the power control device 6b controls the amount of charge supplied to the storage device 6a, thereby controlling the amount of electricity generated by the electric motor 5, and thus controlling the regenerative torque, i.e., the regenerative braking force, generated by the electric motor 5. Alternatively, the regenerative braking device 51 may also be a structure equipped with a dedicated generator that functions as a generator using the rotational force of the rear wheel 4.

[0042] like Figure 4As shown, the rear wheel friction-applying device 52 is configured as a floating caliper and is unitized together with the actuator 55. Furthermore, the rear wheel friction-applying device 52 includes a pair of friction elements 53a and 53b clamping a disc rotor 4a that rotates together with the rear wheel 4, and a spindle 54 for adjusting the distance between the friction elements 53a and 53b and the disc rotor 4a. The actuator 55 includes an electric motor and a mechanism (not shown) that causes the spindle 54 to move linearly in response to the rotational motion of the electric motor. Furthermore, the actuator 55 is controlled by the control device 70, which drives the electric motor to cause the spindle 54 to move linearly forward, thereby adjusting the distance between the friction elements 53a and 53b and the disc rotor 4a. The rear wheel friction-applying device 52 brakes the rear wheel 4 by applying frictional force to it by having the friction elements 53a and 53b abut against the disc rotor 4a. Furthermore, the rear wheel friction-applying device 52 can be any structure that uses the action of the actuator 55, which is unitized together with the rear wheel friction-applying device 52, to move the friction members 53a and 53b and apply frictional force to the rear wheel 4 for braking. For example, the mechanism that adjusts the distance relative to the disc rotor 4a by means of the spindle 54 can also be a structure that transmits the linear forward motion of the spindle 54 to the friction members via an elastic member, or it can be a structure that transmits the linear forward motion of the spindle 54 to the friction members via a fluid such as a working fluid. In addition, the rear wheel friction-applying device 52 can also be a structure other than a floating caliper, for example, it can be configured as an opposed caliper. Furthermore, the actuator 55 can be a structure that is mounted on the outside of the rear wheel friction-applying device 52, or it can be a structure that is built into the rear wheel friction-applying device 52.

[0043] The rear wheel friction-applying device 52, driven by the actuator 55 in response to a control signal from the control device 70, moves the spindle 54 in a first direction. Corresponding to this movement, the friction elements 53a and 53b move towards the disc rotor 4a pressing against the rear wheel 4, thereby generating or increasing the friction braking force that brakes the rear wheel 4. Conversely, the rear wheel friction-applying device 52, driven by the actuator 55 in response to a control signal from the control device 70, moves the spindle 54 in a second direction opposite to the first direction. Corresponding to this movement, the friction elements 53a and 53b pressing against the disc rotor 4a move away from the disc rotor 4a, thereby reducing the friction braking force that brakes the rear wheel 4. Furthermore, the rear wheel side friction-applying device 52 moves the spindle 54 in the second direction, causing the friction elements 53a and 53b to leave the disc rotor 4a of the rear wheel 4, thereby preventing the generation of friction braking force that would brake the rear wheel 4.

[0044] As described above, the rear wheel side friction-applying device 52 is not hydraulically connected to the operating element 11, but is modularized together with the actuator 55, which operates according to the control signal from the control device 70. By means of a so-called drive-by-wire method, the friction elements 53a and 53b can be moved to apply friction braking force to the rear wheel 4 for braking.

[0045] <About the control device> like Figure 5 As shown, the control device 70 includes a first control unit 71 that controls the operation of the filling valve 32, release valve 33, motor 36, switching valve 38, and booster valve 39 included 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 and the hydraulic control unit 30 are modularized and disposed in the body 1 of the motorized two-wheeled vehicle 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, or other such components that can be updated, such as software or firmware, or program modules that can be executed by instructions from a CPU or the like.

[0046] The control device 70 is electrically connected to various types of sensors, including a front wheel rotation speed sensor 81, a first hydraulic sensor 82, a second hydraulic sensor 83, a rear wheel rotation speed sensor 91, a battery level sensor 92, a friction element motion sensor 93, an operating mechanism sensor 94, a road slope sensor 95, and a key switch sensor 96, and receives the output signals of these sensors via wired or wireless input. Furthermore, the control device 70 can perform various calculations and operations, as described later, based on the output signals of these sensors. Additionally, the control device 70 is electrically connected to a filling valve 32, a release valve 33, a motor 36, a switching valve 38, a booster valve 39, a power control device 6b, and an actuator 55, and outputs control signals to these devices via wired or wireless input to control their operation.

[0047] 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 the vehicle body 1, for example. Alternatively, the front wheel rotation speed sensor 81 can also be a sensor that detects other physical quantities that can be substantially converted into the rotation speed of the front wheel 3.

[0048] The first hydraulic sensor 82 detects the hydraulic pressure of the brake fluid in the area on the master cylinder 22 side of the main hydraulic circuit 24c of the hydraulic control unit 30. The first hydraulic sensor 82 is installed in the hydraulic control unit 30 as described above (see reference). Figure 2Alternatively, the first hydraulic sensor 82 may also be a sensor installed in the master cylinder 22 that detects the hydraulic pressure of the brake fluid in the master cylinder 22. Furthermore, the first hydraulic sensor 82 may also be a sensor that detects other physical quantities that can be substantially converted into the hydraulic pressure of the brake fluid in the master cylinder 22 (e.g., the amount of operation of the operating member 11, the displacement of the operating member 11, the displacement of the piston in the master cylinder 22, etc.).

[0049] The second hydraulic sensor 83 detects the hydraulic pressure of the brake fluid in the region on the wheel cylinder 25 side of the main hydraulic circuit 24c of the hydraulic control unit 30. The second hydraulic sensor 83 is installed in the hydraulic control unit 30 (see reference...) for example, as described above. Figure 2 Alternatively, the second hydraulic sensor 83 may also be a sensor installed in the wheel cylinder 25 that detects the hydraulic pressure of the brake fluid in that wheel cylinder 25. Furthermore, the second hydraulic sensor 83 may also be a sensor that detects other physical quantities that can be substantially converted into the hydraulic pressure of the brake fluid in the wheel cylinder 25 (e.g., the displacement of the friction element of the front wheel side friction-applying device 40).

[0050] The 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 vehicle body 1, for example. Alternatively, the rear wheel rotation speed sensor 91 can also be a sensor that detects other physical quantities that can be substantially converted into the rotation speed of the rear wheel 4.

[0051] The remaining charge sensor 92 detects the electrical energy stored in the energy storage device 6a. The remaining charge sensor 92 is, for example, installed in the energy storage device 6a. Alternatively, the remaining charge sensor 92 may also be a sensor that detects other physical quantities that can be substantially converted into the amount of electricity stored in the energy storage device 6a (e.g., the voltage of the battery in the energy storage device 6a, the current input to the energy storage device 6a and output from the energy storage device 6a, the available capacity of the energy storage device 6a to store electricity, etc.).

[0052] The friction element motion sensor 93 detects the movement of the friction elements 53a and 53b of the rear wheel-side friction-applying device 52. The friction element motion sensor 93 is held, for example, by the front wheel-side friction-applying device 40. Alternatively, the friction element motion sensor 93 can also be a sensor that detects 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-applying device 52 (e.g., the driving amount of the actuator 55, the current value that drives the actuator 55, the reaction force acting on the spindle 54, the reaction force acting on the friction elements, etc.). Furthermore, the friction element motion sensor 93 can also be a sensor that detects other physical quantities that can substantially be converted into the driving amount of the actuator 55 or the reaction force acting on the spindle 54.

[0053] The operating mechanism sensor 94 detects the open / closed state of the operating mechanism 12. The operating mechanism sensor 94 is held together with the operating mechanism 12 by the vehicle body 1, for example.

[0054] The road slope sensor 95 detects the slope of the road surface on which the motorized two-wheeler 10 is traveling or parked. The road slope sensor 95 is, for example, held by the vehicle body 1. The road slope sensor 95 can also be a sensor that detects other physical quantities that can be substantially converted into the slope of the road surface.

[0055] The key switch sensor 96 detects the on / off state of the key switch (so-called ignition switch) operated when the rider begins to use the motorized two-wheeler 10. The key switch sensor 96 is held, for example, by the vehicle body 1. The key switch sensor 96 may also be a sensor that detects other physical quantities that can be substantially translated into the start of use of the motorized two-wheeler 10 by the rider.

[0056] The first control unit 71, the second control unit 72, the third control unit 73, and the acquisition unit 74 are housed within the housing 37 of the hydraulic control unit 30, and are modularized together with the hydraulic adjustment mechanism (e.g., filling valve 32, release valve 33, motor 36, switching valve 38, pressure boosting valve 39, etc.). This configuration allows for the sharing of the sealing structures of the first control unit 71, the second control unit 72, the third control unit 73, the acquisition unit 74, and the hydraulic adjustment mechanism, thereby improving the productivity of the braking system 100 and reducing manufacturing costs.

[0057] In this embodiment, the first control unit 71, the second control unit 72, the third control unit 73, and the acquisition unit 74 are arranged in a unitized control device 70 along with the hydraulic control unit 30. However, these units could also be unitized along with any one of the electric motor 5, the energy storage device 6a, the power control device 6b, and the actuator 55, or they could be divided into multiple units and arranged in the motorized two-wheeled vehicle 10. For example, the first control unit 71 could be unitized along with the hydraulic control unit 30, the second control unit 72 along with the regenerative braking device 51, and the third control unit along with the actuator 55. Furthermore, the acquisition unit 74 could be a single unit arranged along with any one of the first control unit 71, the second control unit 72, and the third control unit 73, or it could be arranged separately corresponding to the first control unit 71 to the third control unit 73.

[0058] <Control performed by the control device> The following describes the various actions performed by the control device 70 (e.g., normal braking control, linkage braking control, anti-lock braking control, slippage control, rear wheel friction control, etc.).

[0059] The control device 70, for example, can perform a normal braking control operation in which the front wheel friction-applying device 40 applies frictional braking force to the front wheel 3 in response to the movement of the operating member 11. During normal braking control, the first control unit 71, for example, when the motorized two-wheeler 10 is stopped, or when the motorized two-wheeler 10 is moving without slippage exceeding a reference value between the front wheel 3 and the rear wheel 4, controls the filling valve 32, the release valve 33, the switching valve 38, and the booster valve 39 to a non-energized state, and further controls the motor 36 to a non-drive state. In this state, when the operating member 11 is operated by the rider, i.e., during normal braking, the hydraulic pressure of the brake fluid in the master cylinder 22 increases in response to the movement of the operating member 11. Consequently, the hydraulic pressure of the brake fluid in the wheel cylinder 25 increases, and the friction element of the front wheel friction-applying device 40 moves in the direction pushed against the disc rotor 3a, thereby generating or increasing the frictional braking force of the front wheel 3. Then, when the rider releases the operating element 11 and the operation ends, the hydraulic pressure of the brake fluid in the master cylinder 22 decreases in response to the movement of the operating element 11. Consequently, the hydraulic pressure of the brake fluid in the wheel cylinder 25 decreases, and the friction element of the front wheel side friction-applying device 40 moves away from the disc rotor 3a, thereby reducing or eliminating the frictional braking force on the front wheel 3. That is, during normal braking, the front wheel brake unit 20 can apply a frictional force to the front wheel 3 by the front wheel side friction-applying device 40, corresponding to the hydraulic pressure of the brake fluid in the master cylinder 22 and wheel cylinder 25 generated in response to the movement of the operating element 11, to achieve braking.

[0060] Furthermore, the control device 70 can, for example, execute a linked braking control operation that causes the front wheel side friction-applying device 40 and the regenerative braking device 51 to share the braking force (hereinafter referred to as the required braking force) requested by the rider based on the movement of the operating member 11. In the linked braking control operation, firstly, the acquisition unit 74 acquires the required braking force based on the output signal of the first hydraulic sensor 82, acquires driving information (e.g., speed, vehicle tilt, etc.) related to the driving state of the motorized two-wheeled vehicle 10 based on the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91, and acquires capacity information related to the idle capacity of the battery storage device 6a based on the output signal of the battery remaining 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. Then, if it is determined that the required braking force exceeds the regenerative braking force, the hydraulic control unit 30 is controlled to use the braking force equal to the difference between the required braking force and the regenerative braking force generated by the front wheel-side friction-applying device 40 as the friction braking force, and a control signal indicating the generation of this regenerative braking force is output to the second control unit 72 to control the generation of this regenerative braking force by the regenerative braking device 51. On the other hand, if it is determined that the required braking force does not exceed the regenerative braking force, the first control unit 71 controls the hydraulic control unit 30 to not generate friction braking force by the front wheel-side friction-applying device 40, and controls the generation of regenerative braking force equivalent to the required braking force by the regenerative braking device 51. In addition, in the linked braking control operation, the first control unit 71 may also be configured to share the required braking force by, for example, the ratio of the friction braking force at the front wheel 3 to the regenerative braking force at the rear wheel 4, such that braking is performed while suppressing a decrease in the driving stability of the two-wheeled vehicle 10.

[0061] Furthermore, when the first control unit 71 and the second control unit 72 are in a state where at least one of the front wheel 3 and the rear wheel 4 has locked up or where there is a possibility of locking up, they perform anti-lock braking control operations to suppress locking up. In the anti-lock braking control operation, the first control unit 71, for example, determines whether the front wheel 3 is locked up or where there is a possibility of locking up, based on the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 obtained by the acquisition unit 74. Then, if it is determined that the front wheel 3 is locked up or where there is a possibility of locking up, the hydraulic control unit 30 is controlled to reduce the hydraulic pressure of the brake fluid in the wheel cylinder 25, thereby releasing the front wheel 3 from locking up or reducing the possibility of locking up. Furthermore, the second control unit 72 determines whether the rear wheel 4 is locked up or where there is a possibility of locking up, based on the output signals of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 obtained by the acquisition unit 74. Then, if it is determined that the vehicle is locked or that there is a possibility of locking, the regenerative braking device 51 is controlled to reduce the regenerative braking force, thereby releasing the lock of the rear wheel 4 or reducing the possibility of locking. Furthermore, the first control unit 71 and the second control unit 72 can determine the lock-up of the front wheel 3 and the rear wheel 4 of the motorized two-wheeled vehicle 10 and the possibility of locking by using known methods such as the output signals from the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91.

[0062] Furthermore, when the first control unit 71 and the second control unit 72 are in a state where slippage exceeding a reference value has occurred or a state where slippage is likely to occur, the first control unit 71 and the second control unit 72 execute slippage control actions to suppress slippage. In the slippage control action, the first control unit 71, for example, determines whether slippage exceeding a reference value has occurred in the front wheel 3 or a state where slippage is likely to occur, 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. Then, if it is determined that slippage exceeding a reference value has occurred or a state where slippage is likely to occur, the hydraulic control unit 30 is controlled to increase or decrease the brake fluid in the wheel cylinder 25, thereby suppressing slippage of the front wheel 3 or reducing the likelihood of slippage. Furthermore, the second control unit 72 determines whether slippage exceeding a reference value has occurred in the rear wheel 4 or a state where slippage is likely to occur, 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. Then, if it is determined that a slippage exceeding a reference value has occurred or that a slippage is likely to occur, the regenerative braking device 51 is controlled to increase or decrease the regenerative braking force, thereby suppressing slippage of the rear wheel 4 or reducing the likelihood of slippage. Furthermore, the first control unit 71 and the second control unit 72 can determine the slippage occurring on the front wheel 3 and rear wheel 4 of the motorized two-wheeled vehicle 10 and the likelihood of slippage using well-known methods such as the output signals from the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91.

[0063] Furthermore, during anti-lock braking and slip control operations, the first control unit 71 and the second control unit 72 can also control the hydraulic control unit 30 or the regenerative braking device 51 to apply the reduced braking force to the other wheel when the braking force of one wheel is reduced. Thus, the reduced braking force of one wheel can be compensated for by the braking force of the other wheel.

[0064] Under the condition described later, the third control unit 73 can execute a rear wheel friction application control action Sa, which applies friction braking force from the rear wheel side friction application device 52 to the rear wheel 4. Figure 6 The control action Sa applied to the rear wheel friction is explained.

[0065] like Figure 6As shown, in the rear wheel friction-imposing control action Sa, firstly, the acquisition unit 74 acquires the output signals (Sa01) from the front wheel rotation speed sensor 81, the first hydraulic sensor 82, the second hydraulic sensor 83, the rear wheel rotation speed sensor 91, the road surface slope sensor 95, and the key switch sensor 96. Then, the third control unit 73 determines whether the reference condition is met based on the output signals acquired by the acquisition unit 74.

[0066] The reference conditions include reference conditions 1 to 4. The third control unit 73 determines that a reference condition is met if any one of reference conditions 1 to 4 is met. The first reference condition is that the motorized two-wheeled vehicle 10 is parked, and this occurs within a predetermined time from when the key switch of the motorized two-wheeled vehicle 10 is turned on. The second reference condition is that the motorized two-wheeled vehicle 10 is parked, and the gradient of the road surface where the motorized two-wheeled vehicle 10 is parked exceeds a reference value. The third condition is that the required braking force given by the rider exceeds the friction braking force generated by the front wheel friction-applying device 40. The fourth condition is that the required braking force given 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.

[0067] The third control unit 73 determines, for example, whether the motorized two-wheeled vehicle 10 is in a parked state based on the output signals of either or both of the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91. Furthermore, the third control unit 73 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 the time elapsed since the key switch was turned on is within a predetermined period. Additionally, the third control unit 73 determines whether the road surface slope exceeds a reference value based on the output signal of the road surface slope sensor 95. Furthermore, the third control unit 73 obtains the requested braking force based on the output signal of the first hydraulic sensor 82, and obtains the friction braking force generated by the front wheel side friction applying device 40 based on the output signal of the second hydraulic sensor 83, and determines whether the requested braking force given by the rider exceeds the friction braking force generated by the front wheel side friction applying device 40. Furthermore, the third control unit 73 obtains the required braking force based on the output signal of the first hydraulic sensor 82, obtains the friction braking force generated by the front wheel friction-applying device 40 based on the output signal of the second hydraulic sensor 83, obtains information related to the regenerative braking force from the power control device 6b, and determines whether the required braking force given 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. Alternatively, the third control unit 73 can also determine the stopping state based on the output signal of either the front wheel rotation speed sensor 81 or the rear wheel rotation speed sensor 91. Furthermore, the third control unit 73 can also determine the stopping state based on the output signal of sensors other than the front wheel rotation speed sensor 81 and the rear wheel rotation speed sensor 91 (e.g., vehicle speed sensor, inertial force sensor, etc.). Additionally, under the third and fourth reference conditions, the required braking force given by the rider can be equivalent to the braking force shared by the front wheel friction-applying device 40 and the regenerative braking device 51 by the first control unit 71 when the aforementioned linked braking control action is executed.

[0068] If the third control unit 73 determines that the reference condition is met in step Sa02, it controls the actuator 55 to move the spindle 54 of the rear wheel friction-applying device 52 in the first direction, causing the friction members 53a and 53b to press against the disc rotor 4a of the rear wheel 4, thus applying friction braking force to the rear wheel 4 for braking (Sa03). Therefore, when the vehicle is parked without a predetermined time elapsed since the key switch was turned on, when the motorized two-wheeler 10 is parked on a slope with a gradient exceeding the aforementioned reference value, when the braking force requested by the rider exceeds the friction braking force provided by the front wheel friction-applying device 40, and when the braking force exceeds the sum of the friction braking force provided by the front wheel friction-applying device 40 and the regenerative braking force provided by the regenerative braking device 51, the rear wheel friction-applying device 52 applies friction braking force to the rear wheel 4.

[0069] After the third control unit 73 initiates the application of friction braking force by the rear wheel side friction applying device 52 in step Sa03, it performs a standby release process (Sa04) to maintain braking control of the rear wheel 4 while remaining in standby until the release condition is met. During the standby release process, the acquisition unit 74 acquires the output signal of the operating mechanism sensor 94. Then, based on the output signal of the operating mechanism sensor 94, the third control unit 73 determines whether the operating mechanism 12 has been operated. 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 mechanism 12 has been operated, or if it is determined that a predetermined time has elapsed since the key switch was turned on, the release condition is determined to be met (Sa05).

[0070] If the release condition is determined to be unmet (Sa05: No), the standby process continues to be released (Sa04), and control is performed to maintain the braking of the rear wheel 4 by the rear wheel side friction applicator 52. On the other hand, if the release condition is determined to be met (Sa05: Yes), control is performed to move the spindle 54 of the rear wheel side friction applicator 52 in the second direction by means of the actuator 55, so that the friction members 53a and 53b of the rear wheel side friction applicator 52 move away from the disc rotor 4a of the rear wheel 4, and the application of friction braking force to the rear wheel 4 ends (Sa06).

[0071] Based on the above, when the first reference condition is met, that is, when the motorized two-wheeled vehicle 10 is stopped before a predetermined time has elapsed since the key switch is turned on, the third control unit 73 applies friction braking force to the rear wheel 4 by the rear wheel side friction applicator 52, so that the movement of the motorized two-wheeled vehicle 10 can be suppressed, for example, during the period when the rider is preparing to ride on the motorized two-wheeled vehicle 10.

[0072] Furthermore, when the second reference condition is met, that is, when the motorized two-wheeled vehicle 10 stops on a road surface with a slope exceeding the reference value, the third control unit 73 applies friction braking force to the rear wheel 4 by the rear wheel side friction applicator 52, so as to suppress the downward movement of the motorized two-wheeled vehicle 10 when parking, for example on a slope.

[0073] Furthermore, when the third reference condition is met, that is, when the required braking force given by the rider exceeds the friction braking force provided by the front wheel side friction applying device 40, the third control unit 73 applies friction braking force to the rear wheel 4 by the rear wheel side friction applying device 52. Therefore, in cases such as when the front wheel brake unit 20 malfunctions or the friction braking force provided by the front wheel side friction applying device 40 cannot reach the required braking force, the motorized two-wheeled vehicle 10 can be slowed down and stopped, thereby improving the safety of the motorized two-wheeled vehicle 10 during braking.

[0074] Furthermore, when the fourth reference condition is met, i.e., when the required braking force given by the rider exceeds the sum of the friction braking force provided by the front wheel friction-applying device 40 and the regenerative braking force provided by the regenerative braking device 51, the third control unit 73 applies friction braking force to the rear wheel 4 by the rear wheel friction-applying device 52. Therefore, in situations such as when the front wheel brake 20 malfunctions and the motorized two-wheeler 10 is at a low speed, and the sum of the friction braking force provided by the front wheel friction-applying device 40 and the regenerative braking force provided by the regenerative braking device 51 is insufficient relative to the required braking force; when the front wheel brake 20 malfunctions and the energy storage device 6a has insufficient idle capacity and cannot generate regenerative braking force, and the sum of the friction braking force provided by the front wheel friction-applying device 40 and the regenerative braking force provided by the regenerative braking device 51 is insufficient relative to the required braking force, the motorized two-wheeler 10 can be slowed down and stopped, thereby improving the safety of the motorized two-wheeler 10 during braking.

[0075] <Effects of the Braking System> Conventional braking systems for motorcycles include, for example, hydraulic brakes that apply frictional braking force to the wheels in response to the rider's brake lever operation, and regenerative brakes that apply regenerative braking force to the wheels by having the motor driving the wheels function as a generator. In such braking systems, because the regenerative brake brake brakes brake the wheels by using the rotational force of the wheels to make the motor function as a generator, there are situations where, for example, the braking force from the regenerative brake brake decreases when the wheel's rotation decreases, or when there is no available capacity in the vehicle's battery or other sources to allow the motor to function as a generator, regenerative braking force may not be generated. In such cases, the braking force of the motorcycle may be insufficient, leading to a decrease in safety.

[0076] In contrast, the braking system 100 of the motorized two-wheeled vehicle 10 of this embodiment has the following structure: a front wheel brake 20 that brakes the front wheel 3 of the motorized two-wheeled vehicle 10, and a rear wheel brake 50 that brakes the rear wheel 4 of the motorized two-wheeled vehicle 10. The front wheel brake 20 includes a front wheel side friction-applying device 40 that applies a friction braking force to the front wheel 3 in accordance with 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 the operating member 11 operated by the rider. The rear wheel brake 50 includes a regenerative braking device 51 that uses the rotational force of the rear wheel 4 to enable the electric motor 5 to function as a generator and generate a regenerative braking force on the rear wheel 4 for braking. The rear wheel brake 50 also includes a rear wheel side friction-applying device 52 that moves the friction members 53a and 53b to apply a friction braking force to the rear wheel 4 for braking, and an actuator 55 that is unitized together with the rear wheel side friction-applying device 52 and moves the friction members 53a and 53b.

[0077] Based on this structure, the braking system 100 has the following configuration: the front wheel brake unit 20 includes a front wheel side friction-applying device 40, the rear wheel brake unit 50 includes a regenerative braking device 51, and the rear wheel brake unit 50 also includes a rear wheel side friction-applying device 52 that moves friction members 53a and 53b to apply friction braking force to the rear wheel 4 for braking, and an actuator 55 that is unitized together with the rear wheel side friction-applying device 52 and moves the friction members 53a and 53b. Therefore, during normal braking, braking force can be generated by the front wheel side friction-applying device 40 and the regenerative braking device 51. However, in cases where the regenerative braking force from the regenerative braking device 51 decreases (for example, when the speed of the motorized two-wheeled vehicle 10 is relatively low and the rotational force of the electric motor 5 is low, or when the idle capacity of the battery storage device 6a is small and the generation of regenerative torque by the electric motor 5 is limited), regenerative braking cannot be achieved. In situations where the regenerative braking force generated by device 51 is insufficient (e.g., when the motorized two-wheeler 10 is stationary, when the remaining idle capacity of the battery storage device 6a is almost non-existent and cannot generate regenerative torque from the electric motor 5, or when the regenerative braking device 51 malfunctions), or when the frictional braking force generated by the front wheel-side friction-applying device 40 is insufficient relative to the required braking force corresponding to the movement of the operating component 11 performed by the rider (e.g., when the hydraulic control unit 30 of the front wheel brake unit 20 and / or the front wheel-side friction-applying device 40 malfunctions), the braking ability of the motorized two-wheeler 10 decreases, and it may be impossible to decelerate and stop the motorized two-wheeler 10. In cases where the safety of the motorized two-wheeler 10 may decrease, the actuator 55, which is unitized together with the rear wheel-side friction-applying device 52, is activated to apply frictional braking force to the rear wheel 4, thereby enabling the motorized two-wheeler 10 to decelerate and / or stop. This improves the safety of the motorized two-wheeler 10 during braking.

[0078] The braking system 100 of this embodiment has a structure that includes a front wheel brake unit 20 including a front wheel side friction-applying device 40 and a rear wheel brake unit 50 including a regenerative braking device 51 and a rear wheel side friction-applying device 52 that is unitized with an actuator 55. It also has a control device 70 for controlling the friction braking force generated by the rear wheel side friction-applying device 52. The control device 70 is configured such that, during parking assist control, if it is determined that the braking force required by the rider based on the movement of the operating element 11 exceeds the friction braking force generated by the front wheel side friction-applying device 40 (Sa02), it controls the generation or increase of the friction braking force generated by the rear wheel side friction-applying device 52.

[0079] According to this structure, the control device 70 performs parking assistance control actions. For example, if the hydraulic control unit 30 of the front wheel brake unit 20 or the front wheel side friction-applying device 40 malfunctions, the motorized two-wheeler 10 is in a state where it cannot apply the rider's required braking force to the front wheel 3, and it is determined that the rider's required braking force exceeds the friction braking force provided by the front wheel side friction-applying device 40, the control device 70 generates or increases the friction braking force provided by the rear wheel side friction-applying device 52, thereby enabling the motorized two-wheeler 10 to decelerate and stop. This improves the safety of the motorized two-wheeler 10 during braking.

[0080] The braking system 100 of this embodiment has a structure including a front wheel brake unit 20 including a front wheel side friction-applying device 40 and a rear wheel brake unit 50 including a regenerative braking device 51 and a rear wheel side friction-applying device 52 which is unitized with an actuator 55. It also has a control device 70 for controlling the friction braking force generated by the rear wheel side friction-applying device 52. The control device 70 is configured to generate or increase the friction braking force generated by the rear wheel side friction-applying device 52 when, during a parking assist control operation, it is determined that the braking force required by the rider based on the movement of the operating element 11 exceeds the sum of the friction braking force generated by the front wheel side friction-applying device 40 and the regenerative braking force generated by the regenerative braking device 51 (Sa02).

[0081] According to this structure, the control device 70 performs parking assistance control actions, such as when the motorized two-wheeler 10 is stopped, when the regenerative braking force generated by the regenerative braking device 51 is limited during low-speed driving, when the hydraulic control unit 30 of the front wheel brake unit 20 or the front wheel side friction-applying device 40 malfunctions and cannot apply the rider's required braking force to the front wheel 3, or when it is determined that the rider's required braking force exceeds the sum of the friction braking force provided by the front wheel side friction-applying device 40 and the regenerative braking force provided by the regenerative braking device 51, thereby generating or increasing the friction braking force provided by the rear wheel side friction-applying device 52, thereby enabling the motorized two-wheeler 10 to decelerate and stop. This improves the safety of the motorized two-wheeler 10 during braking.

[0082] The braking system 100 of this embodiment has a structure that includes a front wheel brake unit 20 including a front wheel side friction-applying device 40 and a rear wheel brake unit 50 including a regenerative braking device 51 and a rear wheel side friction-applying device 52 that is unitized with an actuator 55. It also has a control device 70 that controls the friction braking force generated by the rear wheel side friction-applying device 52. The control device 70 has the following structure: in parking assist control operation, when the two-wheeled vehicle 10 is determined to be in a parking state (Sa02), it controls the generation or increase of the friction braking force generated by the rear wheel side friction-applying device 52.

[0083] According to this structure, the control device 70 can maintain the motorized two-wheeler 10 in a stationary state by performing parking assistance control actions and generating or increasing the friction braking force generated by the rear wheel side friction actuation device 52 when the motorized two-wheeler 10 is stopped. Therefore, for example, when starting the motorized two-wheeler 10 on an uphill slope, it can suppress the unexpected movement of the motorized two-wheeler 10 by the rider and improve the safety of the motorized two-wheeler 10.

[0084] The braking system 100 of this embodiment has a structure that includes a front wheel brake unit 20 including a front wheel side friction-applying device 40 and a rear wheel brake unit 50 including a regenerative braking device 51 and a rear wheel side friction-applying device 52 that is unitized with an actuator 55. It also has a control device 70 for controlling the friction braking force generated by the rear wheel side friction-applying device 52. The control device 70 has the following structure: in parking assist control operation, when the motorized two-wheeled vehicle 10 is determined to be in a parking state and the road surface slope exceeds a reference value (Sa02), it controls the generation or increase of the friction braking force generated by the rear wheel side friction-applying device 52.

[0085] According to this structure, the control device 70 performs parking assist control actions, and when the motorized two-wheeler 10 is stopped and the road slope exceeds the reference value, it generates or increases the friction braking force brought by the rear wheel side friction actuation device 52. Therefore, for example, when starting the motorized two-wheeler 10 on an uphill slope and when the motorized two-wheeler 10 is more likely to move unexpectedly by the rider, it can suppress the movement of the motorized two-wheeler 10 and improve the safety of the motorized two-wheeler 10.

[0086] The braking system 100 of this embodiment has a structure that includes a front wheel brake 20 including a front wheel side friction-applying device 40 and a rear wheel brake 50 including a regenerative braking device 51 and a rear wheel side friction-applying device 52 that is unitized with an actuator 55. It has a brake pedal as an operating mechanism 12 operated by the rider, which is different from the operating member 11. The control device 70 has the following structure: in parking assist control operation, when it is determined that the operating mechanism 12 has been operated, it performs control to reduce or eliminate the friction braking force generated by the rear wheel side friction-applying device 52.

[0087] According to this structure, the friction braking force applied to the rear wheel 4 by the rear wheel side friction applying device 52, which is controlled by the parking assist control action, can be reduced or stopped at the point expected by the rider.

[0088] The braking system 100 of this embodiment includes a rear wheel side friction-applying device 52, which is unitized together with the actuator 55. The rear wheel side friction-applying device 52 is a structure in which friction members 53a and 53b are moved in response to the movement of the spindle 54, which is controlled by the actuator 55, and a friction braking force is applied to the rear wheel 4. The structure is as follows: when the friction braking force applied to the rear wheel 4 is increased, the friction members 53a and 53b are moved in the direction of pushing against the rear wheel 4 in response to the movement of the spindle 54 in the first direction; when the friction braking force is decreased, the friction members 53a and 53b are moved away from the rear wheel 4 in response to the movement of the spindle 54 in the second direction, which is opposite to the first direction.

[0089] With this structure, in the braking system 100, regardless of the movement of the operating member 11, the frictional braking force applied to the rear wheel 4 by the rear wheel-side friction-applying device 52 can be increased or decreased. Furthermore, since the rear wheel-side friction-applying device 52 is controlled by the control device 70 via the actuator 55 to increase or decrease the frictional braking force, and since it generates frictional braking force only on the rear wheel 4, the wiring area connecting the control device 70 and the actuator 55 can be narrowed, and the frictional braking force of the rear wheel 4 can be controlled without hydraulic pressure. This improves the adaptability of the braking system 100 to a motorized two-wheeled vehicle 10 and enhances safety.

[0090] The braking system 100 of this embodiment has a structure comprising a front wheel brake 20 including a front wheel side friction-applying device 40, and a rear wheel brake 50 including a regenerative braking device 51 and a rear wheel side friction-applying device 52 unitized with an actuator 55. It also includes a single operating member 11 shared by the front wheel brake 20 and the rear wheel brake 50. With this structure, since braking force from both the front wheel brake 20 and the rear wheel brake 50 is generated by operating a single operating member 11, the operation performed by the rider can be simplified.

[0091] The braking system 100 of this embodiment has a structure that includes an operating element 11, which is operated by the rider. With this structure, the operability of the braking system 100 by the rider can be improved.

[0092] The braking system 100 of this embodiment has a structure that includes an operating element 11 that can be operated by the rider's hand. With this structure, the rider can easily make fine adjustments to the operation of the operating element 11, thereby improving the operability of the braking system 100.

[0093] The motorized two-wheeled vehicle 10 of this embodiment has a structure that includes the braking system 100 described above. With this structure, the motorized two-wheeled vehicle 10 achieves the same effect as the braking system 100 described above.

[0094] In this embodiment, the braking system 100 has a structure that includes a single operating member 11 shared by the front wheel brake 20 and the rear wheel brake 50. However, the braking system 100 may also have a structure that includes a first operating member as the operating member and a second operating member that is different from the first operating member, with the front wheel brake 20 operated by the first operating member and the rear wheel brake 50 operated by the second operating member. With such a structure, the braking force generated by the front wheel brake 20 and the rear wheel brake 50 can be adjusted based on the rider's operation of the first and second operating members, respectively.

[0095] The braking system described above is an example of the embodiments, but the braking system of the present invention is not limited to the description of the embodiments. For example, only a part of the embodiments may be implemented.

[0096] Explanation of reference numerals in the attached figures 1. Body; 2. Handlebars; 3. Front wheel; 4. Rear wheel; 5. Electric motor; 6. Power unit; 6a. Energy storage device; 6b. Electric control device; 10. Motorized two-wheeler; 11. Operating components; 12. Operating mechanism; 20. Front wheel brake; 22. Master cylinder; 23. Regulator; 24. Hydraulic circuit; 25. Wheel cylinder; 30. Hydraulic control unit; 31. Base; 32. Filling valve; 33. Release valve; 34. Regulator; 35. Pump; 36. Motor; 37. Housing; 38. Switching valve; 39. Pressure boosting valve; 40. Front wheel side friction imprinting device; 50. Rear wheel brake; 51. Regenerative braking device; 52. Rear wheel side friction imprinting device; 53. Friction component; 54. Spindle; 55. Actuator; 70. Control device; 71. First control unit; 72. Second control unit; 73. Third control unit; 74. Acquisition unit; 81. Front wheel rotation speed sensor; 82 First hydraulic sensor; 83 Second hydraulic sensor; 91 Rear wheel rotation speed sensor; 92 Remaining battery charge sensor; 93 Friction component motion sensor; 94 Operating mechanism sensor; 95 Road slope sensor; 96 Key switch sensor; 100 Braking system.

Claims

1. A braking system (100) for a riding vehicle (10) having at least one operating element (11) operated by a rider, characterized in that, include: The front wheel brake (20) brakes the front wheel (3) of the aforementioned riding vehicle (10); and The rear wheel brake (50) brakes the rear wheel (4) of the aforementioned riding vehicle (10); The aforementioned front wheel brake unit (20) includes at least a front wheel side friction applicator (40) that applies a friction braking force to the aforementioned front wheel (3) in accordance with the hydraulic pressure of the brake fluid generated by the movement of the aforementioned operating member (11) to perform braking. The aforementioned rear wheel brake unit (50) includes a regenerative braking device (51) that generates regenerative braking force in the aforementioned rear wheel (4) to perform braking. The aforementioned rear wheel braking unit (50) also includes a rear wheel side friction-applying device (52) that moves the friction members (53a, 53b) to apply friction braking force to the aforementioned rear wheel (4) for braking, and an actuator (55) that is unitized together with the aforementioned rear wheel side friction-applying device (52) and moves the aforementioned friction members (53a, 53b).

2. The braking system according to claim 1, characterized in that, The aforementioned braking system (100) includes a control device (70) for controlling the frictional braking force generated by the aforementioned rear wheel side friction-generating device (52). When the aforementioned control device (70) determines that the braking force required by the aforementioned rider based on the movement of the aforementioned operating element (11) exceeds the friction braking force generated by the aforementioned front wheel side friction-applying device (40), it performs control to generate or increase the friction braking force generated by the aforementioned rear wheel side friction-applying device (52).

3. The braking system according to claim 1, characterized in that, The aforementioned braking system (100) includes a control device (70) for controlling the frictional braking force generated by the aforementioned rear wheel side friction-generating device (52). When the aforementioned control device (70) determines that the braking force required by the aforementioned rider based on the movement of the aforementioned operating element (11) exceeds the sum of the friction braking force generated by the aforementioned front wheel side friction-applying device (40) and the regenerative braking force generated by the aforementioned regenerative braking device (51), it performs control to generate or increase the friction braking force generated by the aforementioned rear wheel side friction-applying device (52).

4. The braking system according to any one of claims 1 to 3, characterized in that, The aforementioned braking system (100) includes a control device (70) for controlling the frictional braking force generated by the aforementioned rear wheel side friction-generating device (52). When the aforementioned riding vehicle (10) is in a parked state, the aforementioned control device (70) controls the generation or increase of friction braking force brought by the aforementioned rear wheel side friction imparting device (52).

5. The braking system (10) according to claim 4, characterized in that, When the road surface slope exceeds the reference value, the aforementioned control device (70) controls the generation or increase of friction braking force brought by the aforementioned rear wheel side friction imparting device (52).

6. The braking system according to claim 4, characterized in that, The aforementioned braking system (100) has an operating mechanism (7) operated by the rider that is different from the aforementioned operating member (11). When the aforementioned operating mechanism (7) is operated, the aforementioned control device (70) controls the friction braking force generated by the aforementioned rear wheel side friction-giving device (52) to reduce or eliminate it.

7. The braking system according to any one of claims 1 to 3, characterized in that, The aforementioned rear wheel side friction imparting device (52) has a spindle (54) that is moved by the aforementioned actuator (55) to move the aforementioned friction members (53a, 53b). When the friction braking force is increased, the aforementioned friction elements (53a, 53b) are moved in the direction of pushing against the aforementioned front wheel (3) in the first direction, corresponding to the movement of the spindle (54) brought about by the aforementioned actuator (55). When the friction braking force is reduced, corresponding to the movement of the aforementioned spindle (54) in the second direction opposite to the aforementioned first direction, the aforementioned friction elements (53a, 53b) are moved away from the aforementioned front wheel (3).

8. The braking system according to any one of claims 1 to 3, characterized in that, The aforementioned operating component (11) is a common operating component shared by the aforementioned front wheel brake unit (20) and the aforementioned rear wheel brake unit (40).

9. The braking system according to claim 8, characterized in that, The aforementioned operating component (11) is one.

10. The braking system according to any one of claims 1 to 3, characterized in that, The aforementioned operating component (11) is an operating component operated by the aforementioned rider's hand.

11. The braking system according to any one of claims 1 to 3, characterized in that, The aforementioned braking system includes: The first operating element as described above; and A second operating element that is different from the first operating element mentioned above; The aforementioned front wheel brake unit (20) is operated by the aforementioned first operating member; The aforementioned rear wheel brake unit (50) is operated by the aforementioned second operating member.

12. A riding-type vehicle, characterized in that, The braking system (100) is provided with any one of claims 1 to 3.

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