WO2020250055A1

WO2020250055A1 - Hydraulic control unit for vehicle brake system

Info

Publication number: WO2020250055A1
Application number: PCT/IB2020/054614
Authority: WO
Inventors: 仁張勉
Original assignee: ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング
Priority date: 2019-06-14
Filing date: 2020-05-15
Publication date: 2020-12-17
Also published as: DE112020002884T5; CN113924231A; CN113924231B; JP7270732B2; JPWO2020250055A1; JP2020203526A

Abstract

Provided is a brake fluid pressure control device that allows brake fluid to bypass a damper that absorbs pulsations, depending on the required braking force of a vehicle. The brake fluid pressure control device (20) pertaining to the invention of the present application comprises: a discharge conduit (38) through which the brake fluid pressurized by a pump (45) is discharged; a damper (27) into which the brake fluid flows from the discharge conduit (38); and a bypass valve (39) that guides the brake fluid to selectively pass through either a damper conduit (36) where the brake fluid flowing into the damper (27) flows out or a bypass conduit (37) that bypasses the damper (27). The bypass valve (39) is equipped with a piston (391) that has a damper conduit opening (393) leading to the damper conduit (36) and a bypass conduit opening (394) leading to the bypass conduit (37).

Description

〇 2020/250055 卩 (: 17132020/054614

[Document name] Statement

INDUSTRIAL APPLICABILITY: Hydraulic control unit of a brake system for a vehicle.

【Technical field】

[0 0 0 1]

The present invention relates to a brake hydraulic pressure control device for a vehicle brake system, and more particularly to a brake hydraulic pressure device including a pump for increasing the hydraulic pressure of the brake fluid.

[Background technology]

[0 0 0 2]

A conventional brake hydraulic pressure control device, the main flow path that communicates the master cylinder and the wheel cylinder, the sub-flow path that allows the brake liquid in the main flow path to escape, and the pump in the sub-flow path to the main flow path. -It may have a supply channel to supply the liquid and a hydraulic pressure rate of £ each.

[0 0 0 3]

For example, the upstream end of the brake liquid flow in the secondary flow path is connected to the wheel cylinder side region of the main flow path with reference to the booster valve, and is connected to the downstream side of the secondary flow path. The end is connected to the area of the main flow path on the master cylinder side with respect to the booster valve. In addition, the upstream end of the brake fluid flow in the supply flow path communicates with the master cylinder, and the downstream end of the supply flow path is the downstream region of the secondary flow path with reference to the pressure reducing valve. And it is connected to the suction side of the pump provided in that area. In addition, a circuit control valve is provided in the area of the main flow path on the master cylinder side with reference to the connection with the downstream end of the sub flow path, and the suction control valve is provided in the middle of the supply flow path. Is provided.

[0 0 0 4]

For example, a booster valve, a pressure reducing valve, a pump, a circuit control valve, and a suction control valve, the housing in which they are incorporated, and an electronic control unit that controls their operation (thus, a brake hydraulic pressure control device). It is configured. The hydraulic pressure of the hydraulic pressure circuit is controlled by controlling the operation of the brake hydraulic pressure control device (here, the booster valve, pressure reducing valve, pump, circuit control valve, and suction control valve). Will be done.

[0 0 0 5] 〇 2020/250055 卩 (: 17132020/054614

2

In particular, when it becomes necessary to increase the hydraulic pressure of the brake fluid of the wheel cylinder regardless of the state of brake operation at the input pump 5 of the brake system (for example, the brake pedal, etc.), the boost valve opens. The pump is driven with the pressure reducing valve closed, the circuit control valve closed, and the intake control valve open.

[0 0 0 6]

When the pump is driven, the pulsation generated in the brake fluid is transmitted from the brake system to the engine room of the vehicle, which may generate noise. This noise can be so loud that the user (dryer) feels uncomfortable. For this reason, a conventional hydraulic pressure control device for a brake system has also been proposed to reduce the pulsation generated when the pump is driven. For example, the brake hydraulic pressure control device described in Patent Document 1 includes one pump in one hydraulic pressure circuit, and causes the pulsation of the brake liquid discharged from the pump to the discharge side of the pump. It is equipped with a damper that can be reduced.

[Prior Art Document]

[Patent Document]

[0 0 0 7]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2 0 1 7— 5 3 7 0 20

[Summary of Invention]

[Problems to be Solved by the Invention]

[0 0 0 8]

The damper described in Patent Document 1 reduces the pulsation by temporarily accommodating the pulsation of the brake liquid discharged from the pump in a tube-shaped and elastically deformable suppressing element. However, the brake liquid that has flowed into the restraining element does not contribute to the increase in the hydraulic pressure of the wheel cylinder that brakes the vehicle. Therefore, when the brake liquid is pumped (the vehicle is braked by automatically pressurizing it). There will be a delay in getting the desired brakes. This means that if you want to brake the vehicle suddenly to avoid an imminent collision, collision avoidance or mitigation should be prioritized over noise. Therefore, it is desirable to use a system that can shorten the start-up time of the brake pump depending on the vehicle conditions.

[0 0 0 9] 〇 2020/250055 卩 (: 17132020/054614

3

The present invention has been made in the context of the above-mentioned problems, and the brake fluid discharged from the pump is passed to the wheel cylinder in response to the braking mode of the vehicle and the required braking force without using a damper. It is an object of the present invention to provide a brake hydraulic pressure control device that enables flow.

[Means for solving problems]

[0 0 1 0]

The brake hydraulic pressure control device according to the present invention includes a discharge pipe for discharging the brake liquid boosted by a pump, a damper for which the brake liquid flows in from the discharge pipe, and the brake. A brake liquid comprising a bypass valve that guides the liquid to selectively pass through either a damper pipe through which the brake liquid flowing into the damper flows out or a pipe pass pipe bypassing the damper. A pressure control device (here, the pipe pass valve includes a piston having a damper pipe line opening leading to the damper pipe line and a pipe pass line opening leading to the pipe pass line.

【Effect of the invention】

[0 0 1 1]

In the brake hydraulic pressure control device according to the present invention, a pipe pass valve that guides the brake liquid flowing into the damper to selectively pass through either the damper pipe or the pipe pass pipe bypassing the damper. The brake hydraulic pressure control device (the pipe pass valve is provided with a damper pipe opening leading to the damper pipe and a piston having a pipe pass opening leading to the pipe pass pipe.

In other words, a damper line that reduces the pulsation of the brake liquid that is pressurized by the pump and is accompanied by pulsation according to the braking mode of the vehicle and the required braking force, or a pipe pass line that bypasses the damper. It is possible to selectively pass the pump, and it is possible to improve the degree of freedom in the arrangement of the damper, the damper pipe, and the pipe pass pipe. [Simple explanation of the drawing]

[0 0 1 2]

FIG. 1 is a diagram showing an example of a configuration of a brake hydraulic pressure control device according to an embodiment of the present invention.

FIG. 2 is a diagram showing the arrangement of damper members of a conventional brake hydraulic pressure control device.

FIG. 3 is a diagram showing the arrangement of damper members of the brake hydraulic pressure control device according to the embodiment of the present invention.

FIG. 4 is a view showing a cross section of a pipe pass valve of a brake hydraulic pressure control device according to an embodiment of the present invention. \\ 0 2020/250055 卩 (: 17162020/054614

Four

FIG. 5 is a diagram illustrating the movement of the bypass valve of the brake hydraulic pressure control device according to the embodiment of the present invention.

FIG. 6 is a diagram illustrating the movement of the bypass valve of the brake hydraulic pressure control device according to the embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

[0 0 1 3]

Hereinafter, the hydraulic pressure control unit according to the present invention will be described with reference to the drawings.

[0 0 1 4]

In the following, a case where the brake system including the brake hydraulic pressure control device according to the present invention is mounted on a four-wheeled vehicle is described, but the brake hydraulic pressure control according to the present invention is described. The brake system, including the device, may be installed in vehicles other than four-wheeled vehicles (two-wheeled vehicles, trucks, passes, etc.). Further, the configuration, operation, etc. described below are examples, and the brake system including the hydraulic pressure control unit according to the present invention is not limited to such configuration, operation, etc. Further, in each figure, the same or similar members or parts are designated by the same reference numerals, or the reference numerals are omitted. In addition, the detailed structure is simplified or omitted as appropriate.

<Structure explanation of brake system and brake hydraulic pressure control device ñ

[0 0 1 5]

The brake system shown in Fig. 1 is a diagram showing only the brake system for one wheel in the hydraulic circuit of the brake system for four-wheeled vehicles. In Fig. 1, the brake system is applied to a brake system that amplifies the pedal effort of the brake pedal by the driver and transmits it to the wheel cylinder without using a booster. However, the brake system may be an example of using a booster.

[0 0 1 6]

The brake hydraulic pressure controller 20 has four hydraulic circuits from the first to the fourth. The second to fourth hydraulic circuits have the same configuration as the first hydraulic circuit, so they are omitted from Fig. 1. Hoi of each of the four wheels

The brake liquid is supplied from the master cylinder 1 3 to the cylinder 1 4 via the first to fourth hydraulic circuits.

[0 0 1 7] 〇 2020/250055 卩 (: 17132020/054614

Five

The first hydraulic circuit 30 includes a pump 45 driven by a motor 49. In addition, each of the first hydraulic cycles £ 30 is equipped with an accumulator 25 and a damper 27.

[0 0 1 8]

The pump 4 5 is driven by the motor 4 9 to discharge the brake fluid. The drive of the motor 49 is controlled by the electronically controlled unit 10. The number of pumps 45 provided in the first hydraulic circuit 30 is not limited to one.

[0 0 1 9]

A first pressure sensor 17 is provided in the pipeline that communicates with the master cylinder 13. The first pressure cassette 1 7 detects the internal pressure of the master cylinder 1 3.

[0 0 2 0]

A second pressure sensor 16 is provided in the pipeline that communicates with the wheel cylinder 14 of the wheel hydraulic brake 15. The second pressure sensor 1 6 detects the internal pressure of the wheel cylinder 1 4.

[0 0 2 1]

The first hydraulic circuit 30 includes a plurality of electromagnetic control valves. The plurality of electromagnetic control valves are a circuit control valve 2 2 which is a normally closed type and can be linearly controlled, a suction control valve 2 6 which is a normally closed type and can be controlled on and off, and a pressure booster valve 2 3 which is a normally open type and can be linearly controlled. Includes a pressure reducing valve 24 that is normally closed and controlled on and off.

[0 0 2 2]

Circuit control valve 2 2, connecting the discharge side of the master cylinder 1 3 and the pump 4 5 ^'are disposed in the flow path 3 2. The circuit control valve 2 2 can be linearly controlled, and the flow path area between the master cylinder 1 3 and the booster valve 2 3 is continuously adjusted.

[0 0 2 3]

Suction control valve 2 6 connecting the suction side of the master cylinder 1 3 and the pump 4 5 ^'is arranged in the conduit 3 1. The suction control valve 26 communicates or shuts off between the master cylinder 1 3 and the suction side of the pump 45.

[0 0 2 4]

It is disposed Rushirinda 1 4 connecting the ^'conduit 3 3 - increasing valve 2 3, a circuit control valve 2 2 Hui. Pressure increase The valves 2 3 can be linearly controlled, and the flow rate of hydraulic oil from the master cylinder 1 3 and the circuit control valve 2 2 side to the wheel cylinder 1 4 side of the wheel hydraulic break 1 5 is continuous. Adjust.

[0 0 2 5]

Pressure reducing valve 2 4, the pump 4 5 on the suction side and the wheel - Rushirinda connecting the 1 4 ^'are disposed in the flow path 3 4. The pressure reducing valve 2 4 communicates or shuts off between the suction side of the pump 4 5 and the wheel cylinder 1 4. The pressure reducing valve 2 4 reduces the pressure by supplying the brake fluid supplied to the wheel cylinder 14 of the wheel hydraulic brake 1 5 to the accumulator 2 5 in the valve open state. By intermittently opening and closing the pressure reducing valve 24, the flow rate of the brake fluid flowing from the wheel cylinder 14 to the accumulator 25 can be adjusted.

[0 0 2 6]

The electronic control unit 10 performs the following hydraulic pressure control operations in addition to the well-known hydraulic pressure control operations (ABS control operation, ESP control operation, etc.), for example.

When the booster valve 2 3 is opened, the pressure reducing valve 2 4 is closed, the circuit control valve 2 2 is opened, the suction control valve 2 6 is closed, and the brake pedal 1 1 is operated, the brake pedal 1 1 When it is detected that the hydraulic pressure of the wheel cylinder 14 is insufficient or the possibility of insufficient hydraulic pressure is detected from the detection signal of the brake reper switch BLS and the detection signals of the pressure sensors 17 and 18 of the first hydraulic circuit 30 Electronic control unit 10 starts the active boost control operation.

[0 0 2 7]

In the active boost control operation, the electronic control unit 10 closes the circuit control valve 2 2, opens the suction control valve 26, and opens the boost valve 2 3, and operates the motor 4 9 in a 4-dog state. Drive. This makes it possible for the brake fluid from the master cylinder 1 3 to flow to the wheel cylinder 1 4 through the pipeline 3 1 and the pipeline 3 3. At this time, the electronic control unit 10 limits the flow of the brake fluid from the wheel cylinder 14 to the accumulator 25 by keeping the pressure reducing valve 24 in the closed state. In addition, the electronic control unit 10 adjusts the hydraulic pressure of the brake fluid of the wheel cylinder 14 by linearly controlling the ± pressure valve 2 3.

[0 0 2 8]

When the elimination or avoidance of the insufficient hydraulic pressure of the first hydraulic pressure circuit 30 is detected, the electronic control unit 10 is turned on. 〇 2020/250055 卩 (: 17132020/054614

7

By opening the path control valve 2 2 and closing the suction control valve 2 6 and stopping the drive of the pump 4 5, the active pressure boost control operation is terminated.

[0 0 2 9]

Here, when the pump 45 is driven, the pulsation generated in the brake liquid may be transmitted to the wheel cylinder 14. For this reason, a hydraulic circuit is known in which a damper 27 is provided on the discharge side of the pump 45 to reduce the pulsation by temporarily storing the pulsating brake fluid in the damper. However, when it is necessary to immediately transfer the hydraulic pressure of the brake liquid to the wheel cylinder as in an emergency brake, the brake liquid once stored in the damper does not flow to the wheel cylinder. , There was a problem that the rise of the vehicle braking force was delayed.

[0 0 3 0]

Fig. 2 will be used to explain the arrangement of damper members and the flow of brake liquid in a conventional brake hydraulic pressure control device.

[0 0 3 1]

The damper 2 7 is arranged on the discharge pipe line 3 8 through which the brake liquid discharged from the pump 4 5 passes, and the throttle 2 8 and the check valve 2 9 are arranged downstream of the damper 2 7.

[0 0 3 2]

Pump 45 is configured as a plunger-type pump with two pump members (not shown), which are driven by motors 49 using eccentric bodies. The pump member pumps the brake fluid through the discharge line 38 during operation, causing a flow of brake fluid with hydraulic pressure. This brake fluid pulsates based on a plunger that acts alternately on the pump member. The pump 4 5 is located in the hydraulic housing 21 and pumps the pulsated brake fluid to the discharge line.

[0 0 3 3]

The damper 27 is used to reduce the pulsation of the brake fluid, and therefore has a damping chamber inside. The brake liquid pumped by the pump once flows into the damping chamber. After that, the brake fluid that has flowed out of the damping chamber of the damper 27 flows out to the pipeline 3 3 through the throttle 28. Aperture 2 8 can be adjusted by variable aperture action 〇 2020/250055 卩 (: 17132020/054614

8

It may be configured.

<Example of arrangement of damper members according to the present invention ñ

[0 0 3 4]

The arrangement of the damper member and the flow of the brake liquid according to the present invention will be described with reference to FIG. The same reference numerals are used in FIG. 3 for the same configuration as the conventional arrangement of the damper members, and the same operations and functions as those described in FIG. 2 are obtained.

[0 0 3 5]

The arrangement of the damper members in Fig. 3 is different from the arrangement in Fig. 2, and the pipe pass pipeline 37 and the pipe pass valve 39 are provided. The bypass valve 3 9 can be controlled based on the hydraulic pressure of the brake fluid with the hydraulic pressure generated by the pump 45. The bypass valve 3 9 should allow the brake fluid discharged from the pump 4 5 to pass through the damper line 3 6 in the normal position (position when there is no flow of brake fluid with hydraulic pressure). Set.

[0 0 3 6]

If the hydraulic pressure of the brake fluid passing through the pipe pass valve 3 9 is relatively low, for example, less than 20 pal, the piping fluid stays in the normal position, so the brake fluid is released. Pass through the damper pipeline. On the other hand, when the hydraulic pressure of the brake liquid passing through the pipe pass valve 3 9 is relatively high, for example, 20 pal or more, the brake liquid of the pipe pass valve 3 9 passes through the pipe pass pipeline 3 7. It switches to the passing position. For this reason, the bypass valve 3 9 guides the brake fluid to bypass the damper 2 7 and throttle 2 8 when the hydraulic pressure is relatively high.

[0 0 3 7]

Further, check valves 2 9 and 35 are provided downstream of the damper 2 7 provided in the damper pipe 3 6 and in the pipe pass pipe 3 7. Check valves 2 9, 35 are higher at the bottom of the check valves 2 9, 35 than above; night pressure is configured to close when fluid pressure is generated. If the check valves 2 9, 3 5 are closed and the bypass valve 3 9 closes the damper line 3 6, the damper 2 7 located downstream of the bypass valve 3 9 is shaken. Completely fluid separation from the pipeline system of the hydraulic pressure controller.

[0 0 3 8] 〇 2020/250055 卩 (: 17132020/054614

9

Figure 4 shows a cross section of a bypass valve that can be controlled depending on the hydraulic pressure of the brake fluid.

The bypass valve 3 9 has a cup-shaped piston 3 9 1 and a spring 3 9 2.

One end of the spring 3 9 2 is coupled to the bottom of the piston 3 9 1 and the other end is coupled to the end of the discharge line 3 8 and the spring 3 9 1 is the pumped brake fluid. The piston 3 91 is urged in the direction opposite to the inflow direction. A seal ring 3 95 is provided on the outer wall of the piston 3 9 1 so that the brake fluid does not flow back into the discharge pipe 3 8 through the outer wall of the piston.

[0 0 3 9]

In Fig. 4, the piston 3 9 1 is shown to be in the normal position, and the piston opening metal ring 3 9 6 is provided so that the piston 3 9 1 can be held in the normal state. The spring 3 9 2 is a coiled spring in the embodiment, and the hydraulic pressure of the brake liquid passing through the bypass valve 3 9 is relatively low, specifically less than 20 pars. If so, the panel constant is set so that the spring is held in the position shown in Figure 4. The spring constant is adjusted in advance so that the spring 3 92 contracts when a predetermined force is applied to the piston by the hydraulic pressure of the brake fluid.

[0 0 4 0]

The piston 3 9 1 also has a damper line opening 3 9 3 and a pipes line opening 3 9 4 lateral to the axis of the piston. In the embodiment, the damper line opening 3 9 3 and the pipe pass line opening 3 9 4 are arranged at positions symmetrical with respect to the axial direction of the piston 3 9 1 so that the piston can be easily processed. However, the arrangement of the damper pipe opening 3 9 3 and the pipes pipe opening 3 94 is not limited to this embodiment, and the arrangement may be appropriately changed according to the arrangement of the damper pipe and the pipe pass pipe. In the normal position, the damper line opening leads to the damper line 36, and the bypass line opening 3 9 4 is closed by the discharge line 3 8.

[0 0 4 1]

When the hydraulic pressure of the brake liquid passing through the bypass valve 3 9 becomes a relatively high liquid pressure, specifically, 20 pal or more, the piston 3 9 1 resists the urging force of the spring 3 9 2. Moves downward in Figure 4. At this time, the damper pipe opening 3 9 3 is closed by the discharge pipe 38, and the pipes pipe opening 3 9 4 leads to the pipes pipe 3 7. The damper pipeline opening 3 9 3 and the bypass pipeline opening 3 9 4 have a stepped portion as shown in Fig. 4, and are squeezed. 〇 2020/250055 卩 (: 17132020/054614

Ten

It is configured to be effective.

[0 0 4 2]

Figure 5 shows the two valve positions of the bypass valve 39. Figure 5 shows the normal position of the bypass valve or the position of the bypass valve as the brake fluid with relatively low hydraulic pressure passes through the bypass valve. Figure 6 shows the position of the bypass valve as the brake fluid with a relatively high hydraulic pressure passes through the bypass valve.

[0 0 4 3]

Inside the damper 2 7, an elastically deformable restraining element 2 7 1 is installed to accommodate the pulsating brake liquid. Below the damper 2 7, a damper pipe 3 6 is provided so as to connect the discharge pipe 3 8 and the damper 2 7. In the embodiment, the damper inflow pipe 3 6 3 that passes when the brake fluid flows into the damper 2 7 from the discharge pipe 3 8 and the damper that passes when the brake fluid flows out from the damper 2 7 The outflow pipeline 3 6 is provided substantially parallel to the axis of the damper 2 7. In addition, the pipe pass line 3 7 is connected to the discharge line 3 8 in parallel with the damper inflow line 3 6 3 and the damper outflow line 3 6 匕.

[0 0 4 4]

In the embodiment, the damper inflow pipe 3 6 3 and the pipes pipe 3 7 are arranged on opposite sides of the discharge pipe 3 8 and the pipes valve 3 9 is the damper inflow pipe 3 6 ₃ and the pipes pipe 3 It is arranged at an angle with respect to 7.

Specifically, the angle formed by the sliding direction of the pipe pass valve and the damper inflow pipe line 3 6 3 is an acute angle (also formed by the sliding direction of the pipe pass valve and the pipe pass pipe line 3 7). They are arranged so that the angles to be formed are acute.

[0 0 4 5]

The dashed arrow in Figure 5 shows the flow of the brake fluid as it passes through the bypass valve. The brake fluid that has flowed from the discharge pipe 3 8 to the piston 3 9 1 is accommodated in the restraining element 2 7 1 of the damper 2 7 through the damper pipe opening 3 9 3 and the damper inflow pipe 3 6 3. .. At this time, since the pipe pass pipe opening 3 9 4 is closed by the discharge pipe 3 8 4, the brake fluid flows out from the pipe pass pipe opening 3 94. 〇 2020/250055 卩 (: 17132020/054614

11

It has no structure. After that, the brake liquid passes through the damper outflow pipe 3 6 with the throttle 2 8 and the pipe 3

It is sent to 3.

[0 0 4 6]

The dashed arrow in Fig. 6 shows the flow of the brake liquid as it passes through the bypass valve with a relatively high hydraulic pressure. The brake fluid that has flowed into the piston 3 9 1 from the discharge pipe 3 8 flows out directly to the pipe 3 3 3 through the pipes pipe opening 3 94 and the pipes pipe 3 7. At this time, since the damper pipe opening 3 93 is closed by the discharge pipe, the brake fluid does not flow out through the damper pipe opening. Therefore, it is possible to bypass the damper 2 7 and the throttle 2 8 to reach the pipeline 3 3.

[0 0 4 7]

The effect of the brake hydraulic pressure control device including the bypass valve and the bypass pipeline according to the present embodiment will be explained.

[0 0 4 8]

The brake hydraulic pressure control device according to the present invention includes the piston 3 9 1 of the pipe pass valve 3 9 (this, the damper pipe opening 3 9 3 leading to the damper pipe 3 6 and the pipe pass leading to the pipe pass pipe 3 7). Since the configuration has a pipeline opening 3 94, it is possible to select a damper pipeline that reduces pulsation or a piper pipeline that bypasses the damper, depending on the braking mode of the vehicle and the required braking force. It is possible to pass through the pipes in a targeted manner, and it is possible to improve the degree of freedom in the arrangement of the damper pipe and the pipe pass pipe.

[0 0 4 9]

In the brake hydraulic pressure control device according to the present invention, the bypass valve 3 9 is arranged so as to be inclined with respect to the damper pipeline 3 6 or the bypass pipeline 3 7, and the damper pipeline opening 3 9 3 or the bypass pipe 3 9 is arranged. Since the path opening 3 9 4 is provided on the side of the axis of the piston 3 91, it is possible to fit the pipe pass valve 39, the damper pipe line 36, and the entire pipe pass line into the compact. It is possible to reduce the sliding distance of the piping valve.

[Explanation of symbols]

[0 0 5 0] 〇 2020/250055 卩 (: 17132020/054614

12

1 0 Electronic control unit, 20 Brake hydraulic pressure controller, 2 7 Damper, 2 8 Squeeze, 3 6 Damper line, 3 7 Piper line, 3 8 Discharge line, 3 9 Piper valve, 4 5 Pump, 3 9 1 piston, 3 9 2 spring, 3 9 3 damper line opening, 3 9 4 pipe pass line opening, 3 9 5 seal ring, 3 9 6 metal ring.

Claims

〇 2020/250055 卩 (: 17132020/054614 13 [Document name] Claims

[Claim 1]

The discharge line (3 8) through which the brake liquid boosted by the pump (4 5) is discharged, and

The damper (27) into which the brake liquid flows in from the discharge line (3 8) and

Either the damper line (3 6) where the brake fluid flows into the damper (27) or the bypass line (3 7) that bypasses the damper (2 7) is used. In a brake fluid pressure controller equipped with a pipe pass valve (39) that guides the passage selectively.

The pipe pass valve (3 9) has a damper pipe opening (3 9 3) leading to the damper pipe (3 6) and a pipe pass pipe opening (3 9 4) leading to the pipe pass pipe (3 7) described above. Equipped with a piston (3 9 1)

Blake hydraulic pressure control device.

[Claim 2]

The bypass valve (3 9) is arranged so as to be inclined with respect to the damper pipe (36).

The brake hydraulic pressure control device according to claim 1.

[Claim 3]

The brake hydraulic pressure control device according to claim 1 or 2, wherein the pipe pass valve (39) is arranged at an angle with respect to the pipe pass pipeline (37).

[Claim 4]

The brake hydraulic pressure control device according to any one of claims 1 to 3, wherein the damper pipeline opening (3 9 3) is provided on the side of the axis of the piston (3 9 1).

[Claim 5]

The brake hydraulic pressure control device according to any one of claims 1 to 4, wherein the pipe pass pipeline opening (3 9 4) is provided on the side of the axis of the piston (3 9 1).

[Claim 6]

The damper line opening (3 9 3) and the pipe pass line opening (3 9 4) are the piston (3 9). 〇 2020/250055 卩 (: 17132020/054614

14

The brake hydraulic pressure control device according to any one of claims 1 to 5, which is located symmetrically with respect to the axis of 1).

[Claim 7]

The bypass valve (3 9) has a spring that urges the piston (3 9 1) in the direction opposite to the inflow direction of the brake liquid.

The brake hydraulic pressure control device according to any one of claims 1 to 6.