Braking system and straddle vehicle

Abstract

The present application obtains a kind of brake system, can be executed anti-lock braking control to the front wheel and rear wheel of straddle-type vehicle both sides, and can improve the steering ability of straddle-type vehicle compared with the past.The brake system of the present application is the brake system for straddle-type vehicle that can be executed anti-lock braking control by controlling the pressure of brake fluid supplied to wheel cylinder, with: front wheel side hydraulic control device, it is installed in handlebar rod, controls the pressure of brake fluid supplied to the wheel cylinder of front wheel side brake part;And rear wheel side hydraulic control device, it is installed in the aforementioned handlebar rod, controls the pressure of brake fluid supplied to the wheel cylinder of rear wheel side brake part;Both of the aforementioned front wheel side hydraulic control device and the aforementioned rear wheel side hydraulic control device are hydraulic control device with the base body of master cylinder integrated type.

Description

Technical Field

[0001] This invention relates to a braking system mounted on a motorcycle and a motorcycle equipped with the braking system. Background Technology

[0002] In conventional motorcycles, there exist motorcycles equipped with braking systems that control the braking force of the wheels by controlling the hydraulic pressure of the brake fluid, enabling anti-lock braking control. Furthermore, within such conventional braking systems, there are also motorcycles capable of performing anti-lock braking control on both the front and rear wheels of the motorcycle (see Patent Document 1).

[0003] In conventional braking systems capable of applying anti-lock braking control to both the front and rear wheels of a motorcycle, when the rider grips the brake lever located around the handlebars, the piston of the master cylinder for the front wheel brake is pushed by the brake lever, increasing the pressure of the brake fluid supplied to the wheel cylinder of the front wheel brake. Furthermore, in conventional braking systems capable of applying anti-lock braking control to both the front and rear wheels of a motorcycle, when the rider depresses the brake pedal, the piston of the master cylinder for the rear wheel brake is pushed by the brake pedal, increasing the pressure of the brake fluid supplied to the wheel cylinder of the rear wheel brake. Hereinafter, conventional braking systems capable of applying anti-lock braking control to both the front and rear wheels of a motorcycle will sometimes be referred to simply as conventional braking systems.

[0004] Patent document 1: Japanese Patent Application Publication No. 2017-13731.

[0005] As described above, in conventional braking systems, the piston of the master cylinder for the front wheel brake is pushed by the brake lever, while the piston of the master cylinder for the rear wheel brake is pushed by the brake pedal. Therefore, in conventional braking systems, when mounted on a motorcycle, the front wheel brake mechanism is mounted on the handlebars. In this case, the front wheel brake mechanism is mounted near the end of the handlebars where the brake lever is located. That is, the front wheel brake mechanism is offset at one end of the handlebars. Therefore, in conventional braking systems, the following problem exists: when mounted on a motorcycle, the weight distribution of the mounting component in the left-right direction of the handlebars is uneven, reducing the handling of the motorcycle. Summary of the Invention

[0006] This invention was made in response to the aforementioned problems, and its object is to provide a braking system capable of performing anti-lock braking control on both the front and rear wheels of a motorcycle, and improving the handling of the motorcycle compared to conventional braking systems. Furthermore, an object of this invention is to provide a motorcycle equipped with such a braking system.

[0007] The braking system of the present invention is a braking system for a motorcycle that can perform anti-lock braking control by controlling the pressure of the brake fluid supplied to the wheel cylinder. It includes a front wheel-side hydraulic control device and a rear wheel-side hydraulic control device. The front wheel-side hydraulic control device is mounted on the handlebar and controls the pressure of the brake fluid supplied to the wheel cylinder of the front wheel-side brake unit. The rear wheel-side hydraulic control device is mounted on the handlebar and controls the pressure of the brake fluid supplied to the wheel cylinder of the rear wheel-side brake unit. Both the front wheel-side hydraulic control device and the rear wheel-side hydraulic control device have a master cylinder integrated base and a control valve. The master cylinder integrated base has a piston mounting hole that is provided in a manner that allows the piston of the master cylinder to reciprocate freely, and an internal flow path that communicates with the piston mounting hole and the wheel cylinder as part of the brake fluid flow path. The control valve opens and closes the internal flow path to adjust the pressure of the brake fluid supplied to the wheel cylinder.

[0008] Furthermore, the straddle-type vehicle of the present invention is equipped with the braking system of the present invention.

[0009] In the braking system of the present invention, both the front-wheel-side hydraulic control device and the rear-wheel-side hydraulic control device, which have an integrated master cylinder base, are mounted on the handlebars of a motorcycle. The hydraulic control device with the integrated master cylinder base is configured such that the piston of the master cylinder is pushed by the rider gripping the brake lever. Therefore, when the braking system of the present invention is mounted on a motorcycle, one of the front-wheel-side hydraulic control device and the rear-wheel-side hydraulic control device is located around the left-hand grip portion of the handlebars. Furthermore, the other of the front-wheel-side hydraulic control device and the rear-wheel-side hydraulic control device is located around the right-hand grip portion of the handlebars. Therefore, in the braking system of the present invention, when mounted on a motorcycle, the weight distribution of the mounting on the left and right sides of the handlebars is more even than before, improving the handling of the motorcycle compared to conventional methods. Attached Figure Description

[0010] Figure 1 This is a side view showing a schematic structure of a bicycle equipped with a braking system according to an embodiment of the present invention.

[0011] Figure 2 This is a top view showing the area around the handlebars of a bicycle equipped with a braking system according to an embodiment of the present invention.

[0012] Figure 3 This is a diagram showing a schematic structure of the braking system according to an embodiment of the present invention.

[0013] Figure 4 This is a block diagram illustrating a front wheel-side hydraulic control device according to an embodiment of the present invention.

[0014] Figure 5 This is a block diagram illustrating a rear wheel-side hydraulic control device according to an embodiment of the present invention.

[0015] Figure 6 This is a perspective view showing the front wheel-side hydraulic control device according to an embodiment of the present invention.

[0016] Figure 7 This is a longitudinal sectional view of the front wheel-side hydraulic control device according to an embodiment of the present invention.

[0017] Figure 8 This is a bottom view showing the base of the front wheel-side hydraulic control device according to an embodiment of the present invention.

[0018] Figure 9 This is a diagram showing a schematic structure of a modified example of the braking system according to an embodiment of the present invention.

[0019] Figure 10 This is a block diagram illustrating a modified example of the braking system according to an embodiment of the present invention.

[0020] Figure 11 This is a side view showing a schematic structure of a bicycle equipped with a modified braking system according to an embodiment of the present invention.

[0021] Figure 12 This is a diagram showing a schematic structure of a modified example of the braking system according to an embodiment of the present invention. Detailed Implementation

[0022] The braking system of the present invention and the motorcycle equipped with the braking system will be described below with reference to the accompanying drawings.

[0023] Furthermore, the following description focuses on the application of this invention to bicycles (e.g., two-wheeled vehicles, three-wheeled vehicles, etc.), but the invention can also be used in other straddle-type vehicles besides bicycles. A straddle-type vehicle refers to any vehicle in which a rider straddles and rides. Other straddle-type vehicles besides bicycles include, for example, two-wheeled motor vehicles, three-wheeled motor vehicles, and off-road vehicles that use at least one of an engine or an electric motor as a drive source. Furthermore, a bicycle refers to any means of transportation capable of moving forward on a road by applying force to the pedals. That is, bicycles include ordinary bicycles, electric-assisted bicycles, electric bicycles, etc. Additionally, two-wheeled or three-wheeled motor vehicles refer to so-called motor vehicles, which include motorcycles, scooters, electric scooters, etc.

[0024] Furthermore, the structures and operations described below are examples, and the braking system and motorcycle of the present invention are not limited to such structures and operations.

[0025] Furthermore, in all figures, the same or similar components or parts are labeled with the same reference numerals or the reference numerals are omitted. Additionally, detailed constructions are appropriately simplified or omitted in the illustrations. Furthermore, repetitive descriptions are appropriately simplified or omitted.

[0026] <Integration of braking system into bicycle>

[0027] The implementation of the braking system for the bicycle will be described.

[0028] Figure 1 This is a side view showing a schematic structure of a bicycle equipped with a braking system according to an embodiment of the present invention. Figure 2 This is a top view showing the periphery of the handlebars of a bicycle equipped with a braking system according to an embodiment of the present invention. Furthermore, in Figure 1 In the middle, the left side of the paper shows the front of a bicycle 200. Furthermore, in... Figure 2 In the middle, the front of the bicycle 200 is shown on the upper side of the paper. Furthermore, Figure 2 This indicates that the rider is not holding the brake lever 241. Furthermore, in Figure 2 The image shows a portion of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 in cross-section.

[0029] The bicycle 200 equipped with the braking system 100 includes a frame 210, a swivel unit 230, a saddle 218, pedals 219, a rear wheel 220, a rear wheel side brake unit 252, and a brake light 221.

[0030] The frame 210 includes, for example, a head tube 211 that provides axle support for the steering column 231 of the slewing unit 230, an upper tube 212 and a lower tube 213 connected to the head tube 211, a seat tube 214 connected to the upper tube 212 and the lower tube 213 and holding the saddle 218, and a strut 215 connected to the upper and lower ends of the seat tube 214 and holding the rear wheel 220 and the rear wheel side brake unit 252.

[0031] The slewing unit 230 includes, for example, a steering column 231, a handlebar support 232 held in the steering column 231, a handlebar 233 held in the handlebar support 232, a brake lever 241 provided around the handlebar 233, a front fork 216 connected to the steering column 231, a front wheel 217 rotatably held in the front fork 216, and a front wheel side brake unit 251. The front fork 216 is provided on both sides of the front wheel 217. One end of the front fork 216 is connected to the steering column 231, and the other end is connected to the rotation center of the front wheel 217. That is, the front wheel 217 is rotatably held between a pair of front forks 216. In addition, the front fork 216 may be a front fork with an attached suspension.

[0032] The bicycle 200 of this embodiment has two brake levers 241. Specifically, as Figure 2As shown, the braking system 100 includes a front wheel-side hydraulic control device 1 for performing anti-lock braking control on the front wheel 217 and a rear wheel-side hydraulic control device 2 for performing anti-lock braking control on the rear wheel 220. As described below, both the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 have a master cylinder integrated base 10. The hydraulic control device with the master cylinder integrated base is mounted on the handlebars and has a structure in which the piston of the master cylinder is pushed by a brake lever held by the rider's hand. Therefore, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are mounted on the handlebars 233. Furthermore, the bicycle 200 includes a brake lever 241 for the front wheel-side hydraulic control device 1 and a brake lever 241 for the rear wheel-side hydraulic control device 2.

[0033] When both the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are mounted on the handlebar 233, one of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 is located around the left-hand grip portion 234 of the handlebar 233. The other of the two devices is located around the right-hand grip portion 234 of the handlebar 233. Therefore, in the braking system 100 of this embodiment, when mounted on the bicycle 200, the weight distribution of the mounting on the handlebar 233 in the left-right direction is more even than before, improving the handling of the bicycle 200. Furthermore, in Figure 2 The image shows an example where the rear wheel-side hydraulic control device 2 is located around the handlebar 234 held by the rider's left hand, and the front wheel-side hydraulic control device 1 is located around the handlebar 234 held by the rider's right hand.

[0034] For example, a power supply unit 260, serving as the power source for the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2, is installed on the downtube 213 of the frame 210. The power supply unit 260 can be a battery, or it can be a generator. The generator includes, for example, a generator that generates electricity by the movement of the bicycle 200 (e.g., a hub motor that generates electricity by the rotation of the front wheel 217 or the rear wheel 220, an electric motor that serves as the drive source for the front wheel 217 or the rear wheel 220 and generates regenerative power, etc.), and a generator that generates electricity by sunlight, etc.

[0035] In other words, the bicycle 200 is equipped with a braking system 100 that includes at least a brake lever 241, a front wheel-side brake unit 251, a rear wheel-side brake unit 252, a front wheel-side hydraulic control device 1, a rear wheel-side hydraulic control device 2, and a power supply unit 260. The braking system 100 can perform anti-lock braking control on the front wheel 217 by controlling the pressure of the brake fluid in the front wheel-side brake unit 251 using the front wheel-side hydraulic control device 1. Furthermore, the braking system 100 can perform anti-lock braking control on the rear wheel 220 by controlling the pressure of the brake fluid in the rear wheel-side brake unit 252 using the rear wheel-side hydraulic control device 2.

[0036] Brake light 221 is a device that illuminates when at least one of the front wheel 217 and the rear wheel 220 is braked.

[0037] <Structure of the Braking System>

[0038] The structure of the braking system in the embodiment will be described.

[0039] Figure 3 This is a diagram showing a schematic structure of the braking system according to an embodiment of the present invention.

[0040] As described above, the braking system 100 includes a front wheel-side hydraulic control device 1 and a rear wheel-side hydraulic control device 2. Furthermore, both the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 have a master cylinder integrated base 10. Specifically, a piston mounting hole 21 is formed in the base 10, which allows the piston 51 of the master cylinder 50 to reciprocate freely; details will be described below. The master cylinder 50 is formed by the piston mounting hole 21 and the piston 51. Additionally, a wheel cylinder port 45 and an internal flow path 40 communicating with the piston mounting hole 21 and the wheel cylinder port 45 are formed in the base 10. Furthermore, a storage tank 52 connected to the piston mounting hole 21 and used to store brake fluid is formed in the base 10.

[0041] The internal flow path 40 is the flow path for brake fluid. The internal flow path 40 includes, for example, a first flow path 41, a second flow path 42, a third flow path 43, and a fourth flow path 44. The piston mounting hole 21 of the master cylinder 50 is connected to the wheel cylinder port 45 via the first flow path 41 and the second flow path 42. Furthermore, the inlet end of the third flow path 43 is connected to the middle section of the second flow path 42.

[0042] A front wheel-side brake unit 251 is connected to the wheel cylinder port 45 of the base 10 of the front wheel-side hydraulic control device 1 via a hydraulic pipe 101. The front wheel-side brake unit 251 includes a wheel cylinder 253 and a rotor 254. The wheel cylinder 253 of the front wheel-side brake unit 251 is mounted, for example, on the front fork 216. The wheel cylinder 253 of the front wheel-side brake unit 251 includes a piston portion (not shown) that moves in conjunction with the pressure of the hydraulic pipe 101, and is connected to the outlet side of the second flow path 42 of the front wheel-side hydraulic control device 1 via the hydraulic pipe 101 and the wheel cylinder port 45. That is, the wheel cylinder port 45 of the base 10 of the front wheel-side hydraulic control device 1 is connected to a hydraulic pipe 101 that communicates with the wheel cylinder 253 of the front wheel-side brake unit 251. The rotor 254 of the front wheel-side brake unit 251 is held on the front wheel 217 and rotates together with the front wheel 217. By moving the piston of the wheel cylinder 253 of the front wheel side brake unit 251, the brake pad (not shown) presses against the rotor 254 of the front wheel side brake unit 251, thereby braking the front wheel 217.

[0043] A rear wheel-side brake unit 252 is connected to the wheel cylinder port 45 of the base 10 of the rear wheel-side hydraulic control device 2 via a hydraulic pipe 101. Like the front wheel-side brake unit 251, the rear wheel-side brake unit 252 includes a wheel cylinder 253 and a rotor 254. The wheel cylinder 253 of the rear wheel-side brake unit 252 is mounted, for example, on a strut 215. The wheel cylinder 253 of the rear wheel-side brake unit 252 includes a piston portion (not shown) that moves in conjunction with the pressure of the hydraulic pipe 101, and is connected to the outlet side of the second flow path 42 of the rear wheel-side hydraulic control device 2 via the hydraulic pipe 101 and the wheel cylinder port 45. That is, the wheel cylinder port 45 of the base 10 of the rear wheel-side hydraulic control device 2 is connected to a hydraulic pipe 101 that communicates with the wheel cylinder 253 of the rear wheel-side brake unit 252. The rotor 254 of the rear wheel-side brake unit 252 is held on the rear wheel 220 and rotates together with the rear wheel 220. By moving the piston of the wheel cylinder 253 of the rear wheel side brake unit 252, the brake pad (not shown) presses against the rotor 254 of the rear wheel side brake unit 252, thereby braking the rear wheel 220.

[0044] That is, the internal flow path 40 formed in the base 10 of the front wheel side hydraulic control device 1 and the rear wheel side hydraulic control device 2 is part of the brake fluid flow path that connects the piston mounting hole 21 and the wheel cylinder 253.

[0045] Furthermore, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are equipped with control valves 55 that regulate the pressure of the brake fluid supplied to the wheel cylinder 253 by opening and closing the internal flow path 40. The control valves 55 are located in the base 10. In this embodiment, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2, as control valves 55, are equipped with inlet valves 56 and outlet valves 57.

[0046] An inlet valve 56 is located between the outlet side of the first flow path 41 and the inlet side of the second flow path 42, opening and closing the flow of brake fluid between the first flow path 41 and the second flow path 42. That is, the inlet valve 56 is a valve that opens and closes the flow path of brake fluid flowing from the piston mounting hole 21 to the wheel cylinder 253 in the internal flow path 40. An outlet valve 57 is located between the outlet side of the third flow path 43 and the inlet side of the fourth flow path 44, opening and closing the flow of brake fluid between the third flow path 43 and the fourth flow path 44. The pressure of the brake fluid is controlled by the opening and closing actions of the inlet valve 56 and the outlet valve 57.

[0047] Furthermore, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 include a first winding 61 serving as the drive source for the inlet valve 56 and a second winding 62 serving as the drive source for the outlet valve 57. For example, when the first winding 61 is not energized, the inlet valve 56 allows the brake fluid to flow in both directions. Moreover, if the first winding 61 is energized, the inlet valve 56 becomes closed, blocking the flow of brake fluid. That is, in this embodiment, the inlet valve 56 is a solenoid valve that is open when not energized. Similarly, for example, when the second winding 62 is not energized, the outlet valve 57 blocks the flow of brake fluid. Moreover, if the second winding 62 is energized, the outlet valve 57 becomes open, allowing the brake fluid to flow in both directions. That is, in this embodiment, the outlet valve 57 is a solenoid valve that is closed when not energized.

[0048] Furthermore, accumulators 58 are formed on the base 10 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2. Accumulators 58 are connected to the outlet side of the fourth flow path 44 and store brake fluid that has passed through the outlet valve 57. That is, the outlet valve 57 is a valve that opens and closes the flow path through which brake fluid flows from the wheel cylinder 253 to the accumulator 58 in the internal flow path 40.

[0049] Furthermore, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are equipped with pressure sensors 59 that detect the pressure of the brake fluid in the internal flow path 40. The pressure sensors 59 are located on the base 10. In this embodiment, the pressure sensors 59 detect the pressure of the brake fluid that applies pressure to the wheel cylinder 253. For example, the pressure sensors 59 are connected to the second flow path 42.

[0050] Furthermore, the front wheel hydraulic control device 1 and the rear wheel hydraulic control device 2 are equipped with a control device 70 that controls the opening and closing of the control valve 55 based on the detection results of the pressure sensor 59. The control devices 70 can be centrally located or distributed. Alternatively, at least a portion of the control device 70 of the front wheel hydraulic control device 1 and at least a portion of the control device 70 of the rear wheel hydraulic control device 2 can be centrally located. The control device 70 may include, for example, a microcomputer, a microprocessor unit, etc., and may also include an updatable structure such as firmware, or a program module that is executed according to instructions from a CPU, etc. For example, the control devices 70 of the front wheel hydraulic control device 1 and the rear wheel hydraulic control device 2 are configured as follows.

[0051] Figure 4 This is a block diagram illustrating a front wheel-side hydraulic control device according to an embodiment of the present invention. Furthermore, Figure 5 This is a block diagram illustrating a rear wheel-side hydraulic control device according to an embodiment of the present invention.

[0052] The control devices 70 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are input with the detection results of the pressure sensor 59. Furthermore, in this embodiment, the control device 70 of the front wheel-side hydraulic control device 1 is input with the detection results of the front wheel-side wheel speed sensor 271, which detects the rotational speed of the front wheel 217 as a detection device for detecting information about the riding state of the bicycle 200. Moreover, based on the detection results of the front wheel-side hydraulic control device 1, the control device 70 of the front wheel-side hydraulic control device 1 determines whether the front wheel 217 is locked or the possibility of locking. Similarly, in this embodiment, the control device 70 of the rear wheel-side hydraulic control device 2 is input with the detection results of the rear wheel-side wheel speed sensor 272, which detects the rotational speed of the rear wheel 220 as a detection device for detecting information about the riding state of the bicycle 200. Moreover, based on the detection results of the rear wheel-side hydraulic control device 2, the control device 70 of the rear wheel-side hydraulic control device 2 determines whether the rear wheel 220 is locked or the possibility of locking.

[0053] The control device 70 includes an action determination unit 73 and a control unit 74 as functional units. The action determination unit 73 determines the opening and closing action of the control valve 55. Specifically, the action determination unit 73 determines whether the inlet valve 56 is open or closed. Furthermore, the action determination unit 73 determines whether the outlet valve 57 is open or closed. The control unit 74 controls the opening and closing action of the control valve 55. Specifically, the control unit 74 controls the energization of the first winding 61, so that the state of the inlet valve 56 is as determined by the action determination unit 73. Furthermore, the control unit 74 controls the energization of the second winding 62, so that the state of the outlet valve 57 is as determined by the action determination unit 73.

[0054] Specifically, the control device 70 of the front wheel-side hydraulic control device 1 controls the pressure of the brake fluid supplied to the wheel cylinder 253 of the front wheel-side braking unit 251 by controlling the opening and closing of the inlet valve 56 and outlet valve 57 of the front wheel-side hydraulic control device 1, thereby controlling the braking force of the front wheel 217. In other words, the front wheel-side hydraulic control device 1 controls the pressure of the brake fluid supplied to the wheel cylinder 253 of the front wheel-side braking unit 251. Furthermore, the control device 70 of the rear wheel-side hydraulic control device 2 controls the pressure of the brake fluid supplied to the wheel cylinder 253 of the rear wheel-side braking unit 252 by controlling the opening and closing of the inlet valve 56 and outlet valve 57 of the rear wheel-side hydraulic control device 2, thereby controlling the braking force of the rear wheel 220. In other words, the rear wheel-side hydraulic control device 2 controls the pressure of the brake fluid supplied to the wheel cylinder 253 of the rear wheel-side braking unit 252.

[0055] For example, the control device 70 of the front wheel-side hydraulic control device 1 operates as follows: If the rider grips the brake lever 241, the piston 51 of the master cylinder 50 of the front wheel-side hydraulic control device 1 is pushed by the brake lever 241, thus initiating braking of the front wheel 217. When the front wheel 217 is braked, if the control device 70 of the front wheel-side hydraulic control device 1 determines, based on the detection result of the front wheel speed sensor 271, that the front wheel 217 is locked or has a possibility of locking, then anti-lock braking control is initiated.

[0056] When anti-lock braking control begins, the control device 70 of the front wheel-side hydraulic control device 1 energizes the first winding 61, closing the inlet valve 56 and blocking the flow of brake fluid from the master cylinder 50 to the wheel cylinder 253 of the front wheel-side brake unit 251, thereby suppressing the pressurization of brake fluid in the wheel cylinder 253 of the front wheel-side brake unit 251. On the other hand, the control device 70 of the front wheel-side hydraulic control device 1 energizes the second winding 62, opening the outlet valve 57 and allowing brake fluid to flow from the wheel cylinder 253 of the front wheel-side brake unit 251 to the accumulator 58, thereby depressurizing the brake fluid in the wheel cylinder 253 of the front wheel-side brake unit 251. This releases or prevents the front wheels 217 from locking up. If the control device 70 of the front wheel side hydraulic control device 1 determines, based on the detection result of the pressure sensor 59, that the brake fluid in the wheel cylinder 253 of the front wheel side brake unit 251 has been depressurized to a predetermined value, then the second winding 62 is de-energized, causing the outlet valve 57 to close. Within a short time, the first winding 61 is de-energized, causing the inlet valve 56 to open, thereby increasing the pressure of the brake fluid in the wheel cylinder 253 of the front wheel side brake unit 251. The control device 70 of the front wheel side hydraulic control device 1 can perform the pressure increase / depressurization of the wheel cylinder 253 of the front wheel side brake unit 251 only once, or it can repeat this process multiple times.

[0057] Here, as described above, the pressure sensor 59 detects the pressure of the brake fluid present in the internal flow path 40 that imparts pressure to the wheel cylinder 253. Therefore, the pressure sensor 59 can directly detect the brake fluid in the wheel cylinder 253 of the front wheel-side brake unit 251. Thus, by detecting the pressure of the brake fluid imparting pressure to the wheel cylinder 253 using the pressure sensor 59, the front wheel-side hydraulic control device 1 can perform anti-lock braking control of the front wheel 217 with high precision.

[0058] If the anti-lock braking control ends and the brake lever 241 corresponding to the front wheel-side hydraulic control device 1 is restored, the master cylinder 50 of the front wheel-side hydraulic control device 1 becomes atmospheric pressure, and the brake fluid in the wheel cylinder 253 of the front wheel-side brake unit 251 returns. Furthermore, when the anti-lock braking control ends and the brake lever 241 corresponding to the front wheel-side hydraulic control device 1 is restored, the front wheel-side hydraulic control device 1 opens the outlet valve 57. Therefore, if the pressure of the brake fluid in the internal flow path 40 becomes lower than the pressure of the brake fluid stored in the accumulator 58, the brake fluid stored in the accumulator 58 is discharged without pumping (i.e., without pressurization). Moreover, the brake fluid released from the accumulator 58 returns to the master cylinder 50 through the fourth flow path 44, the outlet valve 57, the third flow path 43, the second flow path 42, and the first flow path 41. Furthermore, the remaining portion of the brake fluid returning to the master cylinder 50 is stored in the storage tank 52.

[0059] Similarly, for example, the control device 70 of the rear wheel-side hydraulic control device 2 operates as follows: If the rider grips the brake lever 241 and the piston 51 of the master cylinder 50 of the rear wheel-side hydraulic control device 2 is pushed by the brake lever 241, braking of the rear wheel 220 begins. When the rear wheel 220 is braked, if the control device 70 of the rear wheel-side hydraulic control device 2 determines, based on the detection result of the rear wheel speed sensor 272, that the rear wheel 220 is locked or has a possibility of locking, anti-lock braking control begins.

[0060] When anti-lock braking control begins, the control device 70 of the rear wheel-side hydraulic control device 2 energizes the first winding 61, closing the inlet valve 56 to block the flow of brake fluid from the master cylinder 50 to the wheel cylinder 253 of the rear wheel-side brake unit 252, thereby suppressing the pressurization of the brake fluid in the wheel cylinder 253 of the rear wheel-side brake unit 252. On the other hand, the control device 70 of the rear wheel-side hydraulic control device 2 energizes the second winding 62, opening the outlet valve 57 to allow brake fluid to flow from the wheel cylinder 253 of the rear wheel-side brake unit 252 to the accumulator 58, thereby depressurizing the brake fluid in the wheel cylinder 253 of the rear wheel-side brake unit 252. This releases or prevents the rear wheel 220 from locking up. If the control device 70 of the rear wheel side hydraulic control device 2 determines, based on the detection result of the pressure sensor 59, that the brake fluid in the wheel cylinder 253 of the rear wheel side brake unit 252 has been depressurized to a predetermined value, then the second winding 62 is de-energized, causing the outlet valve 57 to close. Within a short time, the first winding 61 is de-energized, causing the inlet valve 56 to open, thereby increasing the pressure of the brake fluid in the wheel cylinder 253 of the rear wheel side brake unit 252. The control device 70 of the rear wheel side hydraulic control device 2 can perform the pressure increase / depressurization of the wheel cylinder 253 of the rear wheel side brake unit 252 only once, or it can repeat this process multiple times.

[0061] Here, as described above, the pressure sensor 59 detects the pressure of the brake fluid present in the internal flow path 40 that imparts pressure to the wheel cylinder 253. Therefore, the pressure sensor 59 can directly detect the brake fluid in the wheel cylinder 253 of the rear wheel-side brake unit 252. Thus, by detecting the pressure of the brake fluid imparting pressure to the wheel cylinder 253 using the pressure sensor 59, the rear wheel-side hydraulic control device 2 can perform anti-lock braking control of the rear wheel 220 with high precision.

[0062] If the anti-lock braking control ends and the brake lever 241 corresponding to the rear wheel hydraulic control device 2 is restored, the master cylinder 50 of the rear wheel hydraulic control device 2 becomes atmospheric pressure, and the brake fluid in the wheel cylinder 253 of the rear wheel brake unit 252 returns. Furthermore, when the anti-lock braking control ends and the brake lever 241 corresponding to the rear wheel hydraulic control device 2 is restored, the rear wheel hydraulic control device 2 opens the outlet valve 57. Therefore, if the pressure of the brake fluid in the internal flow path 40 becomes lower than the pressure of the brake fluid stored in the accumulator 58, the brake fluid stored in the accumulator 58 is discharged without pumping. Moreover, the brake fluid released from the accumulator 58 returns to the master cylinder 50 through the fourth flow path 44, the outlet valve 57, the third flow path 43, the second flow path 42, and the first flow path 41. Furthermore, the remaining portion of the brake fluid returning to the master cylinder 50 is stored in the storage tank 52.

[0063] As described above, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are configured such that the brake fluid released from the wheel cylinder 253 during decompression in anti-lock braking control is stored in an accumulator 58, and the brake fluid in the accumulator 58 is discharged to the outside of the accumulator 58 without a pump. Compared with hydraulic control devices that use a pump to discharge the brake fluid in the accumulator to the outside of the accumulator, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 configured in this way can be miniaturized, increasing the flexibility of installation on the bicycle 200.

[0064] Here, in conventional hydraulic control devices that pump-free discharge of brake fluid from the accumulator to the outside of the accumulator, an internal flow path is established to ensure that the brake fluid in the accumulator returns to the master cylinder without passing through the outlet valve. This conventional hydraulic control device's internal flow path includes a bypass flow path with one end connected to the accumulator and the other end connected to the flow path between the master cylinder and the inlet valve. Furthermore, to prevent brake fluid from flowing into the accumulator through the bypass flow path, a check valve is provided in the bypass flow path to restrict the flow of brake fluid from the master cylinder side to the accumulator side. On the other hand, the internal flow paths 40 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are configured such that the brake fluid in the accumulator 58 cannot return to the master cylinder 50 without passing through the outlet valve 57. That is, the internal flow paths 40 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are configured such that the brake fluid in the accumulator 58 cannot return to the piston mounting hole 21 (a structure of the master cylinder 50) formed in the base 10 without passing through the outlet valve 57. The internal flow path 40 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 configured in this way does not require the aforementioned bypass flow path and check valve found in conventional hydraulic control devices. Therefore, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 configured in this way can be further miniaturized, further increasing the degree of freedom in installing the bicycle 200.

[0065] Furthermore, in this embodiment, at least a portion of the control devices 70 for the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are configured as a control board 71. Specifically, in this embodiment, the components of the action determination unit 73 and the control unit 74 in the control device 70 are configured as the control board 71. That is, the control board 71 controls the opening and closing of the control valve 55. In other words, the control board 71 is electrically connected to the first winding 61 and the second winding 62, and controls the energization of the first winding 61 and the second winding 62.

[0066] In this embodiment, the control unit 70 of the front wheel hydraulic control device 1 and the rear wheel hydraulic control device 2 is configured as a functional unit to output a control signal for the brake light 221 based on the detection result of the pressure sensor 59. That is, in this embodiment, the control unit 70 of the front wheel hydraulic control device 1 and the rear wheel hydraulic control device 2 is configured to output a control signal for the brake light 221 based on the detection result of the pressure sensor 59.

[0067] Specifically, when a rider grips the brake lever 241 to brake the front wheel 217, the piston 51 of the master cylinder 50 of the front wheel-side hydraulic control device 1 is pushed by the brake lever 241. This causes the brake fluid pressure within the internal flow path 40 of the front wheel-side hydraulic control device 1 to increase compared to the state when the brake lever 241 is not gripped. In other words, when the rider grips the brake lever 241, the piston 51 of the master cylinder 50 of the front wheel-side hydraulic control device 1 is pushed by the brake lever 241, causing the pressure detected by the pressure sensor 59 of the front wheel-side hydraulic control device 1 to increase compared to the state when the brake lever 241 is not gripped. At this time, the control device 70 of the front wheel-side hydraulic control device 1 outputs a control signal for the brake light 221. Furthermore, if the bicycle 200 receives the control signal for the brake light 221 output by the front wheel-side hydraulic control device 1, it illuminates the brake light 221.

[0068] Similarly, if the rider grips the brake lever 241 to brake the rear wheel 220, the piston 51 of the master cylinder 50 of the rear wheel-side hydraulic control device 2 is pushed by the brake lever 241, and the pressure of the brake fluid in the internal flow path 40 of the rear wheel-side hydraulic control device 2 increases compared to the state when the brake lever 241 is not gripped by the rider. That is, if the rider grips the brake lever 241, the piston 51 of the master cylinder 50 of the rear wheel-side hydraulic control device 2 is pushed by the brake lever 241, and the pressure detected by the pressure sensor 59 of the rear wheel-side hydraulic control device 2 increases compared to the state when the brake lever 241 is not gripped by the rider. At this time, the control device 70 of the rear wheel-side hydraulic control device 2 outputs a control signal for the brake light 221. Moreover, if the bicycle 200 receives the control signal for the brake light 221 output by the rear wheel-side hydraulic control device 2, it illuminates the brake light 221.

[0069] In conventional motorcycles equipped with a hydraulic control system where the piston of the master cylinder is pushed by the rider gripping the brake lever, a mechanical brake switch is provided to detect the position of the brake lever, and the brake light is illuminated based on the detection result of this brake switch. Specifically, the brake switch is located near the brake lever, i.e., near the handlebars. Moreover, the brake switch is configured to be pushed by the brake lever when the rider's hand is gripping it. Furthermore, the brake switch is configured to output a signal when it is pressed or not pressed. In conventional motorcycles equipped with such a hydraulic control system, the presence or absence of the signal output from the brake switch determines whether braking is performed, and the brake light is illuminated accordingly.

[0070] Thus, in a motorcycle equipped with the conventional hydraulic control device described above, a dedicated brake switch needs to be located near the handlebars to check whether braking is in progress. Furthermore, in a motorcycle equipped with the conventional hydraulic control device described above, the signal cable connected to the brake switch needs to be routed to the vicinity of the handlebars. Therefore, the conventional hydraulic control device described above, i.e., the braking system equipped with this hydraulic control device, results in a cluttered area around the handlebars when installed in a motorcycle.

[0071] On the other hand, the control device 70 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 in this embodiment outputs a control signal for the brake light 221 of the bicycle 200 based on the detection result of the pressure sensor 59 used in controlling the pressure of the brake fluid supplied to the wheel cylinder 253. Therefore, when the braking system 100 equipped with the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 is mounted on the bicycle 200, a dedicated brake switch is not required to detect whether braking is in progress. Therefore, when the braking system 100 equipped with the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 is mounted on the bicycle 200, a signal line connected to the brake switch is not required. Therefore, when the braking system 100 is mounted on the bicycle 200, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 of this embodiment can reduce the clutter around the handlebar 233 compared to the conventional method.

[0072] Furthermore, mechanical brake switches are prone to damage. Additionally, when the signal cable connected to the brake switch is routed near the handlebars, the rider's hands or other objects can easily get caught on the cable. Therefore, the front wheel-side hydraulic control device 1 and rear wheel-side hydraulic control device 2 of this embodiment eliminate the need for a brake switch and the signal cable connected to it, thus improving the reliability of the bicycle 200.

[0073] Furthermore, compared to conventional methods, the front wheel-side hydraulic control device 1 and rear wheel-side hydraulic control device 2 of this embodiment can suppress the clutter around the handlebar 233, making them easier to install on the bicycle 200 and increasing the freedom of installation on the bicycle 200. In addition, the base 10 of the front wheel-side hydraulic control device 1 and rear wheel-side hydraulic control device 2 of this embodiment is an integral part of the main cylinder. When the main cylinder 50 and the base 10 are separate, it is necessary to route the hydraulic lines and other piping connecting the main cylinder 50 and the base 10 to the vicinity of the handlebar 233. On the other hand, when the base 10 is an integral part of the main cylinder, it is not necessary to route the aforementioned hydraulic lines and other piping to the vicinity of the handlebar 233. Therefore, compared to the case where the main cylinder 50 and the base 10 are separate, the front wheel-side hydraulic control device 1 and rear wheel-side hydraulic control device 2 of this embodiment further improve the freedom of installation on the bicycle 200 and also further improve the reliability of the bicycle 200.

[0074] Furthermore, in this embodiment, the control devices 70 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 output a control signal for the brake light 221 when the pressure of the brake fluid in the internal flow path 40 decreases due to changes in the opening and closing state of the control valve 55. That is, the control devices 70 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 output a control signal for the brake light 221 when the brake fluid in the wheel cylinder 253 is depressurized using anti-lock braking control. The control signal for the brake light 221 when the brake fluid in the wheel cylinder 253 is depressurized using anti-lock braking control is a signal that can be distinguished from the control signal for the brake light 221 when anti-lock braking control is not applied. Therefore, the bicycle 200 can, for example, adjust the illumination pattern of the brake light 221 according to whether anti-lock braking control is applied during braking. For example, during braking, the bicycle 200 illuminates the brake light 221 when anti-lock braking control is not applied, and flashes the brake light 221 when anti-lock braking control is applied. In this way, by varying the illumination pattern of the brake light 221 based on whether anti-lock braking control is applied during the braking process of the bicycle 200, vehicles traveling behind the bicycle 200 can perceive a change in the braking force of the bicycle 200. Therefore, by outputting a control signal for the brake light 221 when the pressure of the brake fluid in the internal flow path 40 decreases according to the opening and closing state of the control valve 55, the safety of the bicycle 200 is improved. Furthermore, the control signal for the brake light 221 output by the control devices 70 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 can also be used for controls other than illuminating the brake light 221.

[0075] In addition, such as Figure 2 As shown, in the braking system 100 of this embodiment, the brake lever 241 is in contact with the piston 51 of the master cylinder 50 when not gripped by the rider's hand. Therefore, if the rider begins to grip the brake lever 241, the piston 51 of the master cylinder 50 is immediately pushed by the brake lever 241. That is, if the rider begins to grip the brake lever 241, the pressure of the brake fluid in the internal flow path 40 immediately begins to rise. Therefore, in the braking system 100 configured in this way, the delay from when the rider begins to brake the bicycle 200 until the brake light 221 illuminates can be suppressed, thus improving the safety of the bicycle 200.

[0076] <Structure of Hydraulic Control Device>

[0077] The structure of the hydraulic control device of the braking system of the embodiment will be described.

[0078] Furthermore, the braking system 100 of this embodiment includes two hydraulic control devices (a front wheel-side hydraulic control device 1 and a rear wheel-side hydraulic control device 2). Moreover, when the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are mounted on the handlebars 233 of the bicycle 200, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are reversed left-right. Therefore, the front wheel-side hydraulic control device 1 will be described below. That is, by simply reversing the front wheel-side hydraulic control device 1 described below, it becomes the rear wheel-side hydraulic control device 2. By reversing the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2, the design of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 is easier.

[0079] Furthermore, the structure of the front wheel side hydraulic control device 1 will be described below while observing the front wheel side hydraulic control device 1 installed on the handlebars 233 of the bicycle 200 and the bicycle 200 traveling in a straight line.

[0080] Figure 6 This is a perspective view showing a front wheel-side hydraulic control device according to an embodiment of the present invention. Figure 6 This is a perspective view of the front wheel side hydraulic control device 1 viewed from the right rear side. Figure 7 This is a longitudinal sectional view of the front wheel-side hydraulic control device according to an embodiment of the present invention. Figure 8 This is a bottom view showing the base of the front wheel-side hydraulic control device according to an embodiment of the present invention.

[0081] The following is a reference to these Figures 6-8 The front wheel side hydraulic control device 1 will be described in conjunction with the aforementioned figures.

[0082] The base 10 of the front wheel-side hydraulic control device 1 is, for example, a generally rectangular component made of aluminum alloy. Furthermore, the surfaces of the base 10 may be flat, may include curved portions, and may also include steps. The base 10 has a storage groove 52, an inlet valve mounting hole 24, an outlet valve mounting hole 26, a wheel cylinder port 45, and a piston mounting hole 21 for the master cylinder 50.

[0083] The storage tank 52 is formed on the base 10 with an opening on the first surface 11. In other words, the opening 53 of the storage tank 52 is formed on the first surface 11. The front wheel-side hydraulic control device 1 is mounted on the bicycle 200 such that the opening 53 of the storage tank 52 forms the upper part of the storage tank 52 in order to maintain atmospheric pressure inside the storage tank 52. Therefore, the first surface 11 becomes the upper surface of the base 10. Furthermore, the opening 53 of the storage tank 52 is covered by a cover 54.

[0084] The inlet valve mounting hole 24 is a hole provided so that the inlet valve 56 can reciprocate freely. The inlet valve mounting hole 24 is formed in the base 10 with an opening on the opposite side of the first surface 11, i.e., the second surface 12. In other words, the opening 25 of the inlet valve mounting hole 24 is formed on the second surface 12. The second surface 12 is the lower surface of the base 10. The inlet valve mounting hole 24 is formed in the base 10, for example, along the vertical direction. The inlet valve mounting hole 24 is connected to the internal flow path 40. Figure 3 The first flow path 41 and the second flow path 42 are shown. Furthermore, the flow of brake fluid between the first flow path 41 and the second flow path 42 is opened and closed by the reciprocating movement of the inlet valve 56 in the inlet valve mounting hole 24.

[0085] The outlet valve mounting hole 26 is a hole provided so that the outlet valve 57 can reciprocate freely. The outlet valve mounting hole 26 is formed in the base 10 with an opening on the second surface 12. In other words, the opening 27 of the outlet valve mounting hole 26 is formed on the second surface 12. The outlet valve mounting hole 26 is formed in the base 10, for example, along the vertical direction. The outlet valve mounting hole 26 is connected to the internal flow path 40. Figure 3 The third flow path 43 and the fourth flow path 44 are shown. Furthermore, the flow of brake fluid between the third flow path 43 and the fourth flow path 44 is opened and closed by the reciprocating movement of the outlet valve 57 in the outlet valve mounting hole 26.

[0086] As described above, the piston 51 of the master cylinder 50 is configured to reciprocate freely in the piston mounting hole 21 of the master cylinder 50. The piston mounting hole 21 is formed in the base 10 with an opening in the third surface 13 connecting the first surface 11 and the second surface 12. In other words, the opening 23 of the piston mounting hole 21 is formed on the third surface 13. The third surface 13 is a side surface of the base 10. More specifically, in the case of the front wheel-side hydraulic control device 1 provided around the grip portion 234 on the right side of the handlebar 233, the third surface 13 becomes the right side surface of the base 10. Furthermore, in the case of the rear wheel-side hydraulic control device 2 provided around the grip portion 234 on the left side of the handlebar 233, the third surface 13 becomes the left side surface of the base 10.

[0087] Viewed from above, the master cylinder 50 extends along the area of ​​the handlebar 233 facing the master cylinder 50. In other words, viewed from above, the master cylinder 50 is formed in the base 10 in a manner that extends approximately in the left-right direction. The wheel cylinder port 45 is formed in the base 10 such that it opens on the opposite side of the third surface 13, that is, on the fourth surface 14.

[0088] With the inlet valve 56 positioned in the inlet valve mounting hole 24, a portion of the inlet valve 56 protrudes from the opening 25 of the inlet valve mounting hole 24 outwards. That is, with the inlet valve 56 positioned in the inlet valve mounting hole 24, a portion of the inlet valve 56 protrudes downwards from the second surface 12 of the base 10. The first winding 61, serving as the drive source for the inlet valve 56, is arranged to surround the portion of the inlet valve 56 that protrudes downwards from the base 10. Furthermore, the first winding 61 is electrically connected to the control board 71 via a terminal 63.

[0089] With the outlet valve 57 positioned in the outlet valve mounting hole 26, a portion of the outlet valve 57 protrudes from the opening 27 of the outlet valve mounting hole 26 outwards. That is, with the outlet valve 57 positioned in the outlet valve mounting hole 26, a portion of the outlet valve 57 protrudes downwards from the second surface 12 of the base 10. The second winding 62, serving as the drive source for the outlet valve 57, is arranged to surround the portion of the outlet valve 57 that protrudes downwards from the base 10. Furthermore, the second winding 62 is electrically connected to the control board 71 via a terminal 64.

[0090] The first winding 61, the second winding 62, and the control board 71 are housed in the housing 80 of the front wheel-side hydraulic control device 1. The housing 80 is connected to the base 10. The housing 80 housing the first winding 61, the second winding 62, and the control board 71, which are disposed below the base 10, is also disposed below the base 10.

[0091] In conventional hydraulic control devices with an integrated master cylinder base, the inlet valve mounting hole and outlet valve mounting hole are formed in the base in a generally horizontal direction when the hydraulic control device is mounted on the handlebars. That is, in conventional hydraulic control devices with an integrated master cylinder base, when the hydraulic control device is mounted on the handlebars, the inlet valve mounting hole and outlet valve mounting hole are open at the front, rear, or side of the motorcycle. Here, a housing is arranged facing the openings of the inlet valve mounting hole and outlet valve mounting hole in the base, housing the winding that serves as the drive source for the inlet valve, the winding that serves as the drive source for the outlet valve, and a control board for controlling the energization of these windings. In other words, conventional hydraulic control devices with an integrated master cylinder base require sufficient space to accommodate the housing at the front, rear, or side of the hydraulic control device when it is mounted on the handlebars. However, motorcycles have the handlebars located behind the mounting position of the hydraulic control device. Furthermore, various objects are placed in front of and to the side of the hydraulic control unit's mounting location on motorcycles. Therefore, conventional hydraulic control units with an integrated master cylinder base offer limited installation flexibility for motorcycles.

[0092] On the other hand, in the base 10 of the front wheel-side hydraulic control device 1 of this embodiment, the inlet valve mounting hole 24 and the outlet valve mounting hole 26 are formed on the second surface 12, which is the lower surface, when the front wheel-side hydraulic control device 1 is mounted on the handlebar 233 of the bicycle 200. Therefore, in the front wheel-side hydraulic control device 1 of this embodiment, when mounted on the handlebar 233 of the bicycle 200, the first winding 61, the second winding 62, the control board 71, and the housing 80 are arranged below the base 10. Here, in a straddle-type vehicle, the mounting position of the hydraulic control device has more vertical space than the front, rear, and side areas. Therefore, the front wheel-side hydraulic control device 1 of this embodiment, in other words, the rear wheel-side hydraulic control device 2 of this embodiment, improves the degree of freedom of mounting the device on the bicycle 200 compared to the past.

[0093] Here, by Figure 8 As can be seen, the arrangement direction of the opening 25 of the inlet valve mounting hole 24 and the opening 27 of the outlet valve mounting hole 26 in the second surface 12 is along the extending direction (the direction of extension) of the piston mounting hole 21. Specifically, when viewing the front wheel side hydraulic control device 1 mounted on the handlebar 233 of the bicycle 200 from above or below, the arrangement direction of the opening 25 of the inlet valve mounting hole 24 and the opening 27 of the outlet valve mounting hole 26 in the second surface 12 is along the extending direction (the direction of extension) of the piston mounting hole 21. Furthermore, the expression "along" in this embodiment does not mean that the two directions being compared are strictly parallel. The two directions being compared can be slightly tilted. For example, the degree of tilt in the two directions only needs to be less than 45°.

[0094] Generally, the hydraulic control unit with an integrated master cylinder base increases in size along the extension direction of the piston mounting hole. Furthermore, in motorcycles, the mounting location of the hydraulic control unit has more space in the lateral direction compared to the front-rear direction. That is, in motorcycles, the front-rear space around the mounting location of the hydraulic control unit is the smallest among the front-rear, lateral, and vertical directions. Therefore, generally, when viewed from above, the hydraulic control unit with an integrated master cylinder base is mounted on the handlebars of a motorcycle with the piston mounting hole extending along the lateral direction of the motorcycle. In other words, generally, when viewed from above, the hydraulic control unit with an integrated master cylinder base is mounted on the handlebars of a motorcycle with the piston mounting hole extending along the handlebars. Figure 2As shown, the front wheel-side hydraulic control device 1 of this embodiment is also the same. In this case, the front wheel-side hydraulic control device 1, which has a structure in which the arrangement direction of the opening 25 of the inlet valve mounting hole 24 and the opening 27 of the outlet valve mounting hole 26 in the second surface 12 is along the extending direction of the piston mounting hole 21, can suppress the width in the longitudinal direction, which has the least margin in the space at the mounting position of the front wheel-side hydraulic control device 1 on the bicycle 200. Therefore, the front wheel-side hydraulic control device 1 with this structure, in other words, the rear wheel-side hydraulic control device 2 with this structure, further improves the degree of freedom in mounting the bicycle 200.

[0095] As described above, in this embodiment, the front wheel-side hydraulic control device 1 includes a pressure sensor 59. The pressure sensor 59 is provided in a pressure sensor mounting hole 30 formed in the base 10. The pressure sensor mounting hole 30 is formed in the base 10 with an opening on a second surface 12. In other words, the opening 31 of the pressure sensor mounting hole 30 is formed on the second surface 12. The pressure sensor mounting hole 30 is formed in the base 10, for example, along the vertical direction. By forming the opening 31 of the pressure sensor mounting hole 30 on the second surface 12, the pressure sensor 59 and the control board 71 can be connected in the longitudinal direction. Therefore, by forming the opening 31 of the pressure sensor mounting hole 30 on the second surface 12, even when the pressure sensor 59 is provided in the base 10, the increase in size of the front wheel-side hydraulic control device 1 in both the longitudinal and lateral directions can be suppressed. Therefore, the opening 31 of the pressure sensor mounting hole 30 is formed on the front wheel side hydraulic control device 1 of the second surface 12. In other words, the opening 31 of the pressure sensor mounting hole 30 is formed on the rear wheel side hydraulic control device 2 of the second surface 12. Even when the pressure sensor 59 is placed on the base 10, the degree of freedom of installation on the bicycle 200 is increased compared with the past.

[0096] In addition, by Figure 8As can be seen, the arrangement direction of the opening 25 of the inlet valve mounting hole 24, the opening 27 of the outlet valve mounting hole 26, and the opening 31 of the pressure sensor mounting hole 30 in the second surface 12 is along the extending direction (the direction of extension) of the piston mounting hole 21. Specifically, when viewing the front wheel-side hydraulic control device 1 mounted on the handlebar 233 of the bicycle 200 from above or below, the arrangement direction of the opening 25 of the inlet valve mounting hole 24, the opening 27 of the outlet valve mounting hole 26, and the opening 31 of the pressure sensor mounting hole 30 in the second surface 12 is along the extending direction (the direction of extension) of the piston mounting hole 21. With this configuration, the front wheel-side hydraulic control device 1, when the pressure sensor 59 is mounted on the base 10, can suppress the width in the longitudinal direction, which minimizes the space available at the mounting position of the front wheel-side hydraulic control device 1 on the bicycle 200. Therefore, the front wheel-side hydraulic control device 1 configured in this way, or in other words, the rear wheel-side hydraulic control device 2 configured in this way, further improves the installation freedom of the bicycle 200 when the pressure sensor 59 is installed on the base 10. Furthermore, the arrangement of the opening 25 of the inlet valve mounting hole 24, the opening 27 of the outlet valve mounting hole 26, and the opening 31 of the pressure sensor mounting hole 30 in the second surface 12 does not necessarily have to be in a straight line; they can also be arranged in a zigzag pattern.

[0097] Furthermore, in this embodiment, the inlet valve mounting hole 24, the outlet valve mounting hole 26, and the pressure sensor mounting hole 30 are arranged in an order that increases in distance from the wheel cylinder port 45. As described above, in this embodiment, the pressure sensor 59 detects the pressure of the brake fluid that applies pressure to the wheel cylinder 253. In this case, the inlet valve mounting hole 24, the outlet valve mounting hole 26, the pressure sensor mounting hole 30, and the wheel cylinder port 45 are arranged along the flow direction of the brake fluid flowing from the piston mounting hole 21 of the master cylinder 50 toward the wheel cylinder port 45 through the internal flow path 40. Therefore, the shape of the internal flow path 40 from the inlet valve mounting hole 24 to the wheel cylinder port 45 in the front wheel-side hydraulic control device 1 configured in this way, in other words, the rear wheel-side hydraulic control device 2 configured in this way, becomes simple, and manufacturing costs can be suppressed.

[0098] Furthermore, in this embodiment, at least a portion of the retaining portion 95 of the brake operating lever 241, which is held by the rider's hand, is integrally formed on the base 10. The structure of the retaining portion 95 is not particularly limited; in this embodiment, the retaining portion 95 includes a pair of retaining plates 96. These retaining plates 96 have a shaft portion 242 (see reference 246) for holding the brake operating lever 241. Figure 2The brake operating lever 241 is rotatably supported by a hole 97. Furthermore, with the shaft portion 242 of the brake operating lever 241 inserted into the hole 97, a pair of retaining plates 96 movably clamp the brake operating lever 241, thereby allowing the brake operating lever 241 to be held oscillatingly by the retaining portion 95. Additionally, one of the retaining plates 96 is integrally formed with the base 10 on, for example, the fifth surface 15 of the front surface of the base 10. Furthermore, the other of the retaining plates 96 is fixed to the base 10, for example, by means of a fastening screw. By integrally forming at least a portion of the retaining portion 95 with the base 10, compared to forming the retaining portion 95 separately from the base 10, the number of parts in the brake system 100 and assembly time can be reduced, thus suppressing the manufacturing cost of the brake system 100.

[0099] Furthermore, in this embodiment, at least a portion of a mounting portion 90 for mounting the base 10 to the handlebar 233 is integrally formed on the base 10. The structure of the mounting portion 90 is not particularly limited; in this embodiment, the mounting portion 90 includes a base 91 integrally formed on the base 10 and a clamping portion 92 fixed to the base 91 by means of fastening screws or the like. The base 91 is integrally formed with the base 10 on, for example, the sixth surface 16, which is the back surface of the base 10. The handlebar 233 is clamped by the base 91 and the clamping portion 92, and the clamping portion 92 is fixed to the base 91, thereby fixing the base 10 to the handlebar 233. By integrally forming at least a portion of the mounting portion 90 on the base 10, compared to forming the mounting portion 90 separately from the base 10, the number of parts and assembly time of the bicycle 200 equipped with the braking system 100 can be reduced, thus suppressing the manufacturing cost of the bicycle 200.

[0100] Furthermore, in this embodiment, an accumulator 58 is formed on the base 10 of the front wheel-side hydraulic control device 1. The accumulator 58 is positioned on the side opposite to the opening 23 of the piston mounting hole 21, with the bottom 22 of the piston mounting hole 21 as a reference. In other words, the piston mounting hole 21 of the master cylinder 50 and the accumulator 58 are arranged in the left-right direction when viewed from above. The front wheel-side hydraulic control device 1 with the accumulator 58 formed in this manner can suppress the width in the front-rear direction, which has the least margin in the space at the mounting position of the front wheel-side hydraulic control device 1 of the bicycle 200. Therefore, the front wheel-side hydraulic control device 1 with the accumulator 58 formed in this manner, in other words, the rear wheel-side hydraulic control device 2 with the accumulator 58 formed in this manner, when configured with the accumulator 58 formed on the base 10, increases the degree of freedom in mounting the bicycle 200. Furthermore, in this embodiment, the opening of the hole on the sixth surface 16 is closed to form the accumulator 58. However, this structure of the accumulator 58 is only one example. For example, the opening of the hole on the fourth surface 14 can be closed to form an accumulator 58. Alternatively, the opening of the hole on the fifth surface 15 can also be closed to form an accumulator 58.

[0101] <Effects of the Braking System>

[0102] The effects of the braking system described in the implementation method will be explained.

[0103] The braking system 100 of this embodiment is a braking system for a bicycle 200 that can perform anti-lock braking control by controlling the pressure of the brake fluid supplied to the wheel cylinder 253. The braking system 100 of this embodiment includes a front wheel-side hydraulic control device 1 and a rear wheel-side hydraulic control device 2. The front wheel-side hydraulic control device 1 is mounted on the handlebar 233 and controls the pressure of the brake fluid supplied to the wheel cylinder 253 of the front wheel-side brake unit 251. The rear wheel-side hydraulic control device 2 is mounted on the handlebar 233 and controls the pressure of the brake fluid supplied to the wheel cylinder 253 of the rear wheel-side brake unit 252. Furthermore, in the braking system 100 of this embodiment, both the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 include a base 10 and a control valve 55. The base 10 has a piston mounting hole 21 that allows the piston 51 of the master cylinder 50 to reciprocate freely, and an internal flow path 40 that connects the piston mounting hole 21 and the wheel cylinder 253 as part of the brake fluid flow path. Control valve 55 opens and closes internal flow path 40 to regulate the pressure of brake fluid supplied to wheel cylinder 253.

[0104] In the braking system 100 of this embodiment configured in this manner, one of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 is located around the handlebar grip portion 234 (left-side grip portion 234) held by the rider's left hand. Furthermore, the other of the two devices is located around the handlebar grip portion 234 (right-side grip portion 234) held by the rider's right hand. Therefore, in the braking system 100 of this embodiment configured in this manner, when mounted on the bicycle 200, the weight distribution of the mounting component in the left-right direction of the handlebar 233 is more even than before, improving the handling of the bicycle 200 compared to previous systems.

[0105] <Variation Example>

[0106] Figure 9 This is a diagram showing a schematic structure of a modified example of the braking system according to an embodiment of the present invention.

[0107] As described above, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 are configured to store the brake fluid released from the wheel cylinder 253 during decompression in anti-lock braking control in an accumulator 58, and to discharge the brake fluid in the accumulator 58 without a pump. The internal flow path 40 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 implementing this structure is not limited to the aforementioned structure. For example, the internal flow path 40 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 can also be as follows: Figure 9 It is constructed as shown.

[0108] Specifically, Figure 9 The internal flow paths 40 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 shown herein, in addition to having Figure 2 In addition to the structure of the internal flow path 40 shown, it also includes a bypass flow path 46 and a check valve 47. One end of the bypass flow path 46 is connected to the accumulator 58, and the other end is connected to the first flow path 41. The check valve 47 is provided in the bypass flow path 46 to restrict the flow of brake fluid from the master cylinder 50 side to the accumulator 58 side. In the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2, which have such an internal flow path 40, the brake fluid released from the wheel cylinder 253 during decompression in lock-up braking control can also be stored in the accumulator 58, and the brake fluid in the accumulator 58 can be discharged to the outside of the accumulator 58 without pumping via the bypass flow path 46.

[0109] Figure 10 This is a block diagram illustrating a modified example of the braking system according to an embodiment of the present invention. Furthermore, Figure 11 This is a side view showing a schematic structure of a bicycle equipped with a modified braking system according to an embodiment of the present invention.

[0110] exist Figure 10 In the front wheel-side hydraulic control device 1 of the braking system 100 shown, the components of the action determination unit 73 are configured as an action determination control board 72, which is different from the control board 71. Therefore, in Figure 10 In the front wheel-side hydraulic control device 1 of the braking system 100 shown, the components of the control unit 74 are configured as a control board 71. Similarly, in Figure 10 In the rear wheel-side hydraulic control device 2 of the braking system 100 shown, the components of the action determination unit 73 are also configured as an action determination control board 72, which is different from the control board 71. Therefore, in Figure 10In the rear wheel hydraulic control device 2 of the braking system 100 shown, the control unit 74 is configured as a control board 71. Furthermore, the control board 72 for determining the operation of the front wheel hydraulic control device 1 and the control board 72 for determining the operation of the rear wheel hydraulic control device 2 are shared. Moreover, this control board 72 for determining the operation is housed in a different location than the housing 80 of the front wheel hydraulic control device 1 and the housing 80 of the rear wheel hydraulic control device 2. Additionally, the signal output units 75 of the front wheel hydraulic control device 1 and the rear wheel hydraulic control device 2 are also configured as the control board 72 for determining the operation.

[0111] That is, the action determination control board 72 determines the opening and closing action of the control valve 55 of the front wheel-side hydraulic control device 1 and the control valve 55 of the rear wheel-side hydraulic control device 2 based on information about the riding state of the bicycle 200. Furthermore, the control board 71 of the front wheel-side hydraulic control device 1 controls the opening and closing action of the control valve 55 of the front wheel-side hydraulic control device 1 based on the determination of the action determination control board 72. In other words, the control board 71 of the front wheel-side hydraulic control device 1 controls the energization of the first winding 61 and the second winding 62 of the front wheel-side hydraulic control device 1 based on the determination of the action determination control board 72. Similarly, the control board 71 of the rear wheel-side hydraulic control device 2 controls the opening and closing action of the control valve 55 of the rear wheel-side hydraulic control device 2 based on the determination of the action determination control board 72. In other words, the control board 71 of the rear wheel-side hydraulic control device 2 controls the energization of the first winding 61 and the second winding 62 of the rear wheel-side hydraulic control device 2 based on the determination of the action determination control board 72.

[0112] In the braking system 100 configured in this way, the control board 72 for determining the action can be housed in a housing different from the housing 80 of the front wheel-side hydraulic control device 1 and the housing 80 of the rear wheel-side hydraulic control device 2. That is, in the braking system 100 configured in this way, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 can be made more compact, further improving the degree of freedom of installation of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 on the bicycle 200. In addition, in the braking system 100 configured in this way, the number of signal lines connected to the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 can be reduced, further suppressing the complexity around the handlebar 233.

[0113] Here, as Figure 11 As shown, the action determination control board 72 is preferably installed in the bicycle 200 at a position further rearward than the handlebars 233. This allows for the suppression of impacts from stones or other objects during bicycle operation, and also helps to house the action determination control board 72 and improve the reliability of the braking system 100.

[0114] In addition, such as Figure 10 As shown, when the control board for devices other than the braking system 100, i.e., the control board 280 for other devices, is mounted on the bicycle 200, it is preferable that the operation determination control board 72 is integrally formed with the control board 280 for other devices. Here, Figure 11 The bicycle 200 shown has a control board for monitoring the charging level of the power supply unit 260. Therefore, in Figure 11 In the bicycle 200 shown, the control board for monitoring the charging level of the power supply unit 260 can be used as the control board 280 for other devices. Furthermore, the control board 280 for other devices is not particularly limited as long as it is the control board for a device other than the braking system 100. For example, in a motorcycle equipped with an engine as a drive source, there are motorcycles equipped with an engine control unit. For example, the control board of that engine control unit could also be used as the control board 280 for other devices.

[0115] By constructing the braking system 100 in this manner, the manufacturing cost of the braking system 100 can be reduced compared to the case where the control board 72 for determining the action is manufactured as a dedicated control board. Furthermore, by connecting the detection device (e.g., pressure sensor 59) used to detect information for determining the opening and closing of the control valve 55 to the control board 72 and other device control boards 280 via signal lines, the number of signal lines wound to the bicycle 200 can be reduced compared to the case where the control board 72 for determining the action is manufactured as a dedicated control board, thereby reducing the manufacturing time and cost of the bicycle 200.

[0116] Figure 12 This is a diagram showing a schematic structure of a modified example of the braking system according to an embodiment of the present invention.

[0117] Figure 12 The front wheel-side hydraulic control unit 1 and the rear wheel-side hydraulic control unit 2 shown include a pump 60, which supplies brake fluid to the area between the master cylinder 50 (in other words, the piston mounting hole 21) and the inlet valve 56 in the internal flow path 40. Specifically, Figure 12 The front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 shown are in Figure 9 The bypass flow path 46 of the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 shown is equipped with a pump 60. By actuating the pump 60, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 configured in this way can discharge the brake fluid stored in the accumulator 58 during decompression in anti-lock braking control to the outside of the accumulator 58 through the bypass flow path 46.

[0118] Although the miniaturization effect of pump-free discharge of brake fluid from the accumulator 58 to the outside of the accumulator 58 cannot be obtained in the front wheel side hydraulic control device 1 and the rear wheel side hydraulic control device 2 configured in this way, other effects can be obtained.

[0119] In addition, such as Figure 12 The front wheel-side hydraulic control device 1, configured as shown, allows for the activation of the pump 60 by opening the inlet valve 56 and closing the outlet valve 57 when the rider is not holding the brake lever 241. This pressurizes the brake fluid in the wheel cylinder 253 of the front wheel-side brake unit 251, thereby generating braking force on the front wheel 217. Similarly, as... Figure 12 The rear wheel-side hydraulic control device 2 configured as shown is designed to pressurize the brake fluid in the wheel cylinder 253 of the rear wheel-side brake unit 252 by opening the inlet valve 56 and closing the outlet valve 57, thereby generating braking force on the rear wheel 220, when the rider is not holding the brake lever 241.

[0120] By applying braking force to at least one of the front wheel 217 and the rear wheel 220 in this manner, the bicycle 200 can be equipped with an automatic braking function, for example. Furthermore, by applying braking force to at least one of the front wheel 217 and the rear wheel 220 in this manner, slippage can be suppressed when the bicycle 200 is turning, thus stabilizing the movement of the bicycle 200.

[0121] Here, when braking force is applied to the front wheel 217 in this manner, the pressure detected by the pressure sensor 59 increases in the front wheel-side hydraulic control device 1. Similarly, when braking force is applied to the rear wheel 220 in this manner, the pressure detected by the pressure sensor 59 increases in the rear wheel-side hydraulic control device 2. Therefore, the front wheel-side hydraulic control device 1 and the rear wheel-side hydraulic control device 2 preferably output a control signal for the brake light 221 when the pressure detected by the pressure sensor 59 increases during the operation of the pump 60. In the conventional method of illuminating the brake light based on the detection result of the brake switch when braking force is applied to the wheels of the bicycle 200 as described above, the brake light 221 cannot be illuminated because the rider is not holding the brake lever 241. However, by outputting a control signal for the brake light 221 when the pressure detected by the pressure sensor 59 increases during the operation of the pump 60, the brake light 221 can be illuminated when braking force is applied to the wheels of the bicycle 200 while the rider is not holding the brake lever 241. Furthermore, vehicles traveling behind bicycle 200 can thus sense a change in the braking force of bicycle 200. Therefore, by outputting a control signal for brake light 221 when the pressure detected by pressure sensor 59 increases during the operation of pump 60, the safety of bicycle 200 is improved.

[0122] The embodiments have been described above, but the present invention is not limited to the description of the embodiments. For example, the present invention may be implemented with respect to only a part of the description of the embodiments.

[0123] Explanation of reference numerals in the attached figures

[0124] 1. Front wheel side hydraulic control device; 2. Rear wheel side hydraulic control device; 10. Base; 11. First surface; 12. Second surface; 13. Third surface; 14. Fourth surface; 15. Fifth surface; 16. Sixth surface; 21. Piston mounting hole; 22. Bottom; 23. Opening; 24. Inlet valve mounting hole; 25. Opening; 26. Outlet valve mounting hole; 27. Opening; 30. Pressure sensor mounting hole; 31. Opening; 40. Internal flow path; 41. First flow path; 4 2. Second flow path, 43. Third flow path, 44. Fourth flow path, 45. Cylinder port, 46. Bypass flow path, 47. Check valve, 50. Master cylinder, 51. Piston, 52. Storage tank, 53. Opening, 54. Cover, 55. Control valve, 56. Inlet valve, 57. Outlet valve, 58. Accumulator, 59. Pressure sensor, 60. Pump, 61. First winding, 62. Second winding, 63. Terminal, 64. Terminal, 70. Control device, 71. Control board, 72. Action determination 73 Control board, 74 Motion determination unit, 75 Signal output unit, 80 Housing, 90 Mounting part, 91 Base, 92 Clamping part, 95 Holding part, 96 Holding plate, 97 Hole, 100 Braking system, 101 Hydraulic pipe, 200 Bicycle, 210 Frame, 211 Head tube, 212 Top tube, 213 Down tube, 214 Seat tube, 215 Stirrer, 216 Fork, 217 Front wheel, 218 Saddle, 219 220 Pedal, 220 Rear wheel, 221 Brake light, 230 Rotating part, 231 Steering column, 232 Handlebar support, 233 Handlebar, 234 Handlebar grip, 241 Brake control lever, 242 Shaft, 251 Front wheel side brake, 252 Rear wheel side brake, 253 Wheel cylinder, 254 Rotor, 260 Power supply unit, 271 Front wheel side wheel speed sensor, 272 Rear wheel side wheel speed sensor, 280 Other device control board.

Claims

1. A brake system (100) for a straddle-type vehicle (200) capable of controlling the pressure of brake fluid supplied to a wheel cylinder (253) to perform antilock brake control, characterized by comprising: a front wheel side hydraulic control device (1), a rear wheel side hydraulic control device (2), the front wheel side hydraulic control device (1) is mounted to a handlebar stem (233) and controls the pressure of brake fluid supplied to the wheel cylinder (253) of a front wheel side brake unit (251), the rear wheel side hydraulic control device (2) is mounted to the handlebar stem (233) and controls the pressure of brake fluid supplied to the wheel cylinder (253) of a rear wheel side brake unit (252), both the front wheel side hydraulic control device (1) and the rear wheel side hydraulic control device (2) include a master cylinder integrated base (10) and a control valve (55), the master cylinder integrated base (10) is formed with a piston mounting hole (21) in which a piston (51) of a master cylinder (50) is disposed so as to be able to move reciprocally, and an internal flow path (40) that is a part of a brake fluid flow path connecting the piston mounting hole (21) and the wheel cylinder (253), the control valve (55) opens and closes the internal flow path (40) to adjust the pressure of brake fluid supplied to the wheel cylinder (253), both the front wheel side hydraulic control device (1) and the rear wheel side hydraulic control device (2) include a control substrate (71) that controls the opening and closing operation of the control valve (55), an operation determining control substrate (72) is provided, which determines the opening and closing operation of the control valve (55) of the front wheel side hydraulic control device (1) and the opening and closing operation of the control valve (55) of the rear wheel side hydraulic control device (2) based on information on the running state of the straddle-type vehicle (200), the control substrate (71) of the front wheel side hydraulic control device (1) is configured to control the opening and closing operation of the control valve (55) of the front wheel side hydraulic control device (1) based on the determination of the operation determining control substrate (72), the control substrate (71) of the rear wheel side hydraulic control device (2) is configured to control the opening and closing operation of the control valve (55) of the rear wheel side hydraulic control device (2) based on the determination of the operation determining control substrate (72).

2. The brake system (100) according to claim 1, characterized in that: the operation determining control substrate (72) is mounted to a position further rearward than the handlebar stem (233) in the straddle-type vehicle (200).

3. The brake system (100) according to claim 1 or 2, characterized in that: the straddle-type vehicle (200) is configured to mount an other device control substrate (280) that is a control substrate of a device other than the brake system (100), the operation determining control substrate (72) is integrally formed with the other device control substrate (280).

4. The brake system (100) according to claim 1 or 2, characterized in that Both of the aforementioned front-wheel-side hydraulic control device (1) and the aforementioned rear-wheel-side hydraulic control device (2) are configured to store brake fluid released from the wheel cylinder (253) at the time of pressure reduction in the aforementioned antilock brake control in an accumulator (58) formed in the aforementioned base body (10), and to pumplessly discharge the brake fluid in the aforementioned accumulator (58) to the outside of the aforementioned accumulator (58).

5. The brake system (100) according to claim 4, characterized in that Both of the aforementioned front-wheel-side hydraulic control device (1) and the aforementioned rear-wheel-side hydraulic control device (2) are provided with an outlet valve (57) as the aforementioned control valve (55), the aforementioned outlet valve (57) opening and closing a flow path through which brake fluid flowing from the aforementioned wheel cylinder (253) to the aforementioned accumulator (58) in the aforementioned internal flow path (40), The aforementioned internal flow path (40) of both of the aforementioned front-wheel-side hydraulic control device (1) and the aforementioned rear-wheel-side hydraulic control device (2) is configured such that brake fluid in the aforementioned accumulator (58) cannot return to the aforementioned piston mounting hole (21) without passing through the aforementioned outlet valve (57).

6. A straddle-type vehicle (200), characterized in that The brake system (100) according to any one of claims 1 to 5 is provided.

7. The straddle-type vehicle (200) according to claim 6, characterized in that The straddle-type vehicle (200) is a bicycle.

8. The straddle-type vehicle (200) according to claim 6, characterized in that The straddle-type vehicle (200) is a motor vehicle.

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