WO2014077353A1

WO2014077353A1 - Brake fluid pressure control apparatus

Info

Publication number: WO2014077353A1
Application number: PCT/JP2013/080877
Authority: WO
Inventors: 康仁関原; 裕貴大島
Original assignee: 株式会社アドヴィックス
Priority date: 2012-11-15
Filing date: 2013-11-15
Publication date: 2014-05-22
Also published as: CN104797471B; CN104797471A; JP2014097761A; JP5880402B2

Abstract

The purpose is to decrease the physical size of a brake fluid pressure control apparatus for implementing pressure increasing/decreasing control for the fluid pressure in a wheel cylinder. A brake fluid pressure control apparatus is provided with: a piston pump (5); a pump drive motor (3); an eccentric cam rotated by the motor to activate the piston pump; a pressure-increasing electromagnetic valve (6); and a pressure-decreasing electromagnetic valve (7), in which the piston pump (5), the eccentric cam, the pressure-increasing electromagnetic valve (6), and the pressure-decreasing electromagnetic valve (7) are assembled in a housing (1a). The single piston pump (5) is installed, with the piston pump (5), when mounted on a vehicle, disposed in an upright posture under or above a cam chamber (11) of the housing in which the eccentric cam is housed.

Description

Brake hydraulic pressure control device

The present invention relates to a brake hydraulic pressure control device including a motor-driven pump used in a vehicle hydraulic brake device.

As a conventional example of a brake fluid pressure control device for a vehicle that is arranged in a fluid pressure path from a master cylinder to a wheel cylinder and performs wheel pressure increase / decrease control for the purpose of avoiding wheel lock, for example, the following patent There is one disclosed in Document 1.

The brake fluid pressure control device disclosed in this document is provided with a piston pump that is driven by an eccentric cam and a motor that rotates the eccentric cam as a power source. There are two sets of the piston pumps, and the two sets of piston pumps are separately arranged in the front wheel system and the rear wheel system of the two-wheeled vehicle.

Also, the two sets of piston pumps are arranged facing each other at a position sandwiching the eccentric cam in a horizontal orientation when the device is mounted on the vehicle.

WO2009 / 057594

A conventional brake fluid pressure control device that employs a piston pump, like the device of the above-mentioned Patent Document 1, faces two piston pumps in a horizontal position and sandwiches an eccentric cam for driving the piston therebetween. It is arranged.

For this reason, the width of the housing in which the piston pump and the solenoid valve for increasing / decreasing pressure are assembled is increased, and there is a limit to the reduction in the size of the brake fluid pressure control device.

An object of the present invention is to realize a reduction in the physique of a brake hydraulic pressure control device that solves such problems and performs an increase / decrease control of the hydraulic pressure of a wheel cylinder.

In order to solve the above-described problems, in the present invention, a brake is incorporated in a hydraulic pressure path from the master cylinder to the wheel cylinder and performs increase / decrease control of the hydraulic pressure supplied to the wheel cylinder based on a command from the electronic control unit. Liquid pressure control device, more specifically, a piston pump, a motor for driving the pump, an eccentric cam that is rotated by the motor to operate the piston pump, and a liquid that reaches the wheel cylinder from the discharge port of the piston pump A pressure-increasing solenoid valve disposed in the pressure supply path, and a pressure-reducing solenoid valve disposed in the hydraulic pressure discharge path from the wheel cylinder to the piston pump suction port, the piston pump, the eccentric cam, and the booster The following characteristics were given to the brake hydraulic pressure control device in which the pressure solenoid valve and the pressure reduction solenoid valve were incorporated in the housing.
That is, the number of piston pumps is set to a single one, and the piston pumps are placed in a standing posture below the cam chamber of the housing in which the eccentric cam is accommodated or above the cam chamber when the device is mounted on a vehicle. Arranged.

The standing posture here refers to a posture in which the side of the piston pump where the piston contacts the eccentric cam faces the top in a state where the device is mounted on the vehicle, and the tip side facing the pump chamber of the piston faces the ground side, or Say the opposite posture. This standing posture is not limited to a vertical posture. The object of the invention can also be achieved by assembling the piston pump in a posture inclined with respect to a vertical axis while the device is mounted on the vehicle.

Preferred forms of this brake fluid pressure control device are listed below.
1) The piston pump is disposed below the cam chamber of the housing, and is incorporated into a pump assembly hole provided in the housing so as to open on an outer surface (for example, a lower surface) facing downward of the housing. The opening of the assembly hole is closed with an end plug.
2) The pump assembly hole of the apparatus according to 1) is formed in a hole that opens on the lower surface of the housing and extends vertically upward from the lower surface.
3) The pressure-increasing solenoid valve and the pressure-reducing solenoid valve of the apparatus in the form of 1) or 2) are arranged on the side of the piston pump in parallel with the axis of the eccentric cam, and the pressure-increasing electromagnetic valve Each of the valve, the pressure reducing solenoid valve and the piston pump communicate with each other through a lateral hole provided in the housing, and further, the master cylinder port and the wheel cylinder port are provided at a position opening on the outer surface facing the housing, A vertical hole is provided in the housing and connected between the master cylinder port and the pressure increasing solenoid valve and between the wheel cylinder port and the pressure reducing solenoid valve. In this device, the piston pump may be arranged either below or above the cam chamber.
4) The solenoid valve for pressure increase and the solenoid valve for pressure reduction of the apparatus of the form of 3) above are arranged symmetrically on the left and right of the piston pump with the piston pump as the center.
5) The pressure increasing solenoid valve and the pressure reducing solenoid valve are mounted on the outer surface of the housing perpendicular to the axis of the eccentric cam, and the motor is mounted on the outer surface of the housing to which the solenoid valve is mounted. This device also does not matter whether the piston pump is below or above the cam chamber.

Since the brake fluid pressure control device according to the present invention has the piston pump that is long in the axial direction in the standing posture, the assembly space in the width direction of the piston pump is greatly reduced. In addition, since the piston pump can be arranged at the center in the width direction of the housing, the space utilization efficiency is improved. Further, since the number of piston pumps installed is one set, the height of the housing is not increased, and the physique can be reduced by these synergistic effects.

The brake fluid going from the piston pump to the cam chamber is affected by gravity. Therefore, in the case where the piston pump is provided below the cam chamber, leakage through the outer periphery of the piston is suppressed. In addition, the brake fluid leaking into the cam chamber can be expected to return to the piston pump due to the influence of gravity, and it is not difficult to collect the leaked brake fluid.

In addition, if the piston pump is installed in a pump assembly hole opened on the outer surface facing downward of the housing and the opening of the hole is closed with an end plug, the device is installed in a place where it is directly exposed to the rainwater etc. of the vehicle. Even in this case, water does not collect at the inlet of the end plug fitting gap, the operation hole of the end plug, etc., which is advantageous in terms of preventing corrosion.

Furthermore, the pump assembly hole is formed in the lower surface of the housing and is a hole extending in the vertical direction from the lower surface, the effect of reducing the width direction assembly space, the effect of reducing the amount of leakage of brake fluid from the piston pump, The effect of preventing the water from staying with respect to the inlet of the fitting gap of the end plug is maximized.

In addition, a solenoid valve for pressure increase and a solenoid valve for pressure reduction are arranged on the side of the piston pump in parallel with the shaft center of the eccentric cam, and each of these solenoid valves and the piston pump are provided in lateral holes provided in the housing. In addition, the master cylinder port and the wheel cylinder port are connected to the pressure increasing solenoid valve or pressure reducing solenoid valve through the vertical hole provided in the housing by providing the master cylinder port and the wheel cylinder port at a position that opens on the outer surface facing the top of the housing. The connection workability of the passage hole can be improved, and simplification and downsizing of the internal structure of the housing can be realized.

In addition, the solenoid valve for pressure increase and the solenoid valve for pressure reduction are arranged symmetrically on the left and right sides of the piston pump, and the center of gravity position of the device is set at the center in the width direction. Resonance can be made difficult to occur.

Further, the solenoid valve for pressure increase and the solenoid valve for pressure reduction are mounted on the outer surface perpendicular to the shaft center of the eccentric cam of the housing, and the motor for driving the pump is attached to the outer surface of the housing to which the solenoid valve is mounted. As compared with a device having a structure in which the motor is attached to the outer surface on the opposite side of the housing, the size of the device in the cam shaft direction can be shortened, and the effect of reducing the physique can be greatly enhanced.

The perspective view of the state which made transparent the housing of the hydraulic block which shows an example of the brake hydraulic pressure control apparatus of this invention End view of the brake fluid pressure control device of FIG. 1 with the housing made transparent 1 is a left side view of the housing of the brake fluid pressure control device of FIG. 1 in a transparent state. The bottom view of the state which made the housing of the brake fluid pressure control device of Drawing 1 transparent Cross section of piston pump assembly End view showing another example of the brake fluid pressure control device of the present invention with the housing of the fluid pressure block made transparent Circuit diagram of an example of a hydraulic brake device employing the brake hydraulic pressure control device of the present invention

Hereinafter, an embodiment of a brake fluid pressure control device of the present invention will be described with reference to FIGS. 1 to 7 of the accompanying drawings.

FIG. 7 is a circuit diagram of an example of a hydraulic brake device employing the brake hydraulic pressure control device of the present invention. The hydraulic brake device 30 is for a two-wheeled vehicle, and includes a first system master cylinder 33 operated by one brake lever 31, a second system master cylinder 34 operated by the other brake lever 32, It comprises a first system wheel cylinder 35 and a second system wheel cylinder 36, and a brake fluid pressure control device 20 incorporated in a fluid pressure path from the first system master cylinder 33 to the same system wheel cylinder 35.

The first system and the second system are independent systems, and the hydraulic control of the wheel cylinder 36 of the second system is not electronically controlled.

The brake hydraulic pressure control device 20 includes a hydraulic pressure block 1 shown in FIGS. 1 to 4 and a circuit board 2a on which an electronic control device (ECU 8 in FIG. 7) is mounted as shown in FIG. 3 in a case 2b. The electronic control unit 2 is combined with a motor 3 that drives a piston pump 5 built in the hydraulic block 1.

The hydraulic pressure block 1 is arranged in a hydraulic pressure supply path extending from the piston pump 5, the eccentric cam 4 driven and rotated by the motor 3, and the discharge cylinder of the piston pump 5 to the first system wheel cylinder 35. The pressure solenoid valve 6 is combined with the pressure reducing solenoid valve 7 arranged in the hydraulic pressure discharge path from the wheel cylinder 35 to the suction port of the piston pump 5.

The eccentric cam 4, the piston pump 5, the pressure increasing solenoid valve 6 and the pressure reducing solenoid valve 7 are incorporated in the housing 1 a of the hydraulic pressure block 1. The housing 1 a includes a master cylinder port 9 connected to the first system master cylinder 33 and a wheel cylinder port 10 connected to the first system wheel cylinder 35. Reference numeral 11 in FIGS. 1, 2 and 5 denotes a cam chamber provided in the housing 1a, in which the eccentric cam 4 is accommodated.

The pressure-increasing solenoid valve 6, the pressure-reducing solenoid valve 7 and the motor 3 operate in response to a command from an electronic control unit (ECU) mounted on the circuit board of the electronic control unit 2, and increase or decrease the hydraulic pressure of the wheel cylinder 35. Take control.

It should be noted that a low-pressure fluid reservoir for temporarily storing brake fluid discharged from the wheel cylinder and a damper for damping pump pulsation are provided inside the housing 1a as necessary.

As shown in FIG. 5, the piston pump 5 is a combination of a piston 5 a, a pump chamber 5 b facing the tip of the piston, a suction valve 5 c, and a discharge valve 5 d, and the piston 5 a is connected to the eccentric cam 4. In contact therewith, the eccentric cam advances and retreats by the rotation of the eccentric cam, and the brake fluid is sucked and discharged by the operation. This is a known pump.

The piston pump 5 has only one set. Further, the piston pump 5 is disposed in a standing posture at a position below the cam chamber 11 of the housing when the apparatus is mounted on the vehicle. The illustrated piston pump 5 is incorporated into a pump assembly hole 12 (see FIG. 5) that opens to the lower outer surface of the housing 1a (the lower surface of the housing illustrated) and extends vertically upward therefrom. The axis is vertical and faces the top and bottom. The direction of the top and bottom when the device is mounted on the vehicle is as shown in FIG.

The piston pump 5 of the brake hydraulic pressure control device of the first embodiment shown in FIGS. 1 to 5 is disposed at the center in the width direction of the housing 1a, and is provided on the side (left and right) of the piston pump 5 for pressure increase. The electromagnetic valve 6 and the pressure reducing electromagnetic valve 7 are arranged symmetrically. For this reason, the center of gravity of the device comes to the center in the width direction, and resonance during use induced by vibration of the mounted vehicle is difficult to occur.

In addition, by installing the piston pump 5 in the pump assembly hole 12 with the downward opening, a recess in the inlet of the fitting gap of the end plug 13 (see FIG. 5) that closes the opening of the pump assembly hole 12 or necessary Accordingly, an operation hole (not shown) provided in the end plug is directed downward so that rainwater or the like does not stay in the recess or the operation hole.

Each piston pump 5 of intensifying the electromagnetic valve 6 and the pressure reducing electromagnetic valve 7, as shown in FIG. 2, the transverse bore 14 -1 provided in the housing _1a, in 14 _-2, for vacuum and intensifying solenoid valve 6 between the solenoid valve 7 is communicated by connecting each in lateral hole 14 _-3. Further, the master cylinder port 9 and the wheel cylinder port 10 are provided at positions that open on the outer surface (the upper surface in the illustrated apparatus) facing upward of the housing 1a. The master cylinder port 9 and the pressure increasing solenoid valve 6 A vertical hole 15 _-1 passing through the side portion of the cam chamber 11 is provided between them and connected to each other.

Similarly, pressure reducing electromagnetic valve 7 and the wheel cylinder port 10 also, a vertical hole 15 _-2 through the sides of the cam chamber 11 therebetween are provided are connected to each other. Incidentally, lateral hole ₁₄ -1, the opening of _{14 -2} is closed by a plug (not numbered).

By adopting such a structure, the connection work of the passage hole provided inside the housing 1a is excellent, and the internal structure of the housing can be simplified and downsized.

In addition, the pressure increasing solenoid valve 6 and the pressure reducing solenoid valve 7 are mounted on the outer surface f1 perpendicular to the axis of the eccentric cam 4 of the housing 1a, and the motor 3 is mounted on the outer surface f1 to which these solenoid valves are mounted. Yes.

In a brake fluid pressure control device having a general structure, a motor is mounted on the outer surface opposite to the outer surface on which a solenoid valve is mounted. On the other hand, in the illustrated brake fluid pressure control device, the motor 3 is attached to the outer surface on which the electromagnetic valve is mounted, and the

electromagnetic valves

6 and 7 for increasing and decreasing pressure and the motor 3 are covered with the case 2b of the electronic control unit 2. For this reason, the motor is also protected from rain water, etc., and the dimensions of the device in the cam shaft direction are shortened by attaching the solenoid valve and the motor to the same outer surface of the housing, so that the physique is a brake fluid pressure with a general structure. Compared to the control device, it is greatly reduced.

In addition, the outer surface of the housing 1a that opens the pump assembly hole 12 is not limited to the lower surface. If the pump assembly hole 12 is open on the downward surface, an effect of preventing rainwater stagnation with respect to the recess of the inlet of the fitting gap of the end plug that closes the opening of the pump assembly hole can be obtained. As described above, the pump assembly hole 12 may be provided to be opened on the upper surface of the housing 1a.

FIG. 6 shows a second embodiment of the brake fluid pressure device of the present invention, in which the piston pump 5 is arranged in a standing posture above the cam chamber 11 of the housing 1a. Other configurations are not much different from those of the first embodiment.

That is, similarly to the device of the first embodiment, the pressure increasing solenoid valve 6 and the pressure reducing solenoid valve 7 are arranged on both sides of the piston pump 5, and each of the pressure increasing solenoid valve 6, the pressure reducing solenoid valve 7 and the piston are arranged. The pump 5 is communicated with the lateral holes 14 _-1 and 14 _-2 provided in the housing 1a, and the master cylinder port 9 and the wheel cylinder port 10 are provided on the upper surface of the housing 1a so as to increase pressure with the master cylinder port 9 The solenoid valve 6 and the wheel cylinder port 10 and the pressure reducing solenoid valve 7 are connected to each other by vertical holes 15 _-1 and 15 _-2 provided in the housing 1a.

The piston pump 5 is the same as the pump of FIG. 5 except that the direction of the piston pump 5 is opposite to that of the first embodiment. Therefore, also in this second embodiment, the space for assembling the piston pump in the width direction is greatly reduced, the space utilization efficiency is improved, and the physique reduction effect is obtained.

In both of the first and second embodiments, the pressure increasing solenoid valve 6 and the pressure reducing solenoid valve 7 are arranged on the side of the piston pump in parallel with the axis of the eccentric cam. Since each of the solenoid valves and the piston pump 5 communicate with each other through a lateral hole provided in the housing 1a and are further connected to the pressure increasing solenoid valve 6 and the pressure reducing solenoid valve 7 through the longitudinal hole, the workability of connecting the passage hole is improved. In addition, the internal structure of the housing can be simplified.

In both the first and second brake fluid pressure control devices, the piston pump 5 is in a vertical orientation when the device is mounted on the vehicle. The piston pump 5 is assembled to the housing 1a. It is possible to incline within a range that does not cause interference with a valve for increasing / decreasing pressure or a hydraulic pressure path formed in the housing.

Reference numeral 16 in FIGS. 1, 2, and 4 denotes a connector block included in the electronic control unit 2. The connector block 16 is a resin housing in which terminals are implanted, and its weight is not large. The influence of this on the weight balance of the entire apparatus can be ignored.

DESCRIPTION OF SYMBOLS 1 Hydraulic block 1a Housing f1 Outer surface perpendicular to the axis of the eccentric cam of the housing 2 Electronic control unit 2a Circuit board 2b Case 3 Motor 4 Eccentric cam 5 Piston pump 5a Piston

5b Pump chamber

5c Suction valve

5d Discharge valve 6 Electromagnetic for pressure increase Valve 7 Solenoid valve for pressure reduction 8 ECU
9 master cylinder port 10 wheel cylinder port 11 cam chamber 12 pump assembly hole 13 the end plug ₁₄ -1, _{14 -2,} _{14 -3} horizontal hole ₁₅ -1, _{15 -2} longitudinal hole 20 the brake fluid pressure control device 16 connector block 30

Hydraulic brake device

31, 32

Brake lever

33, 34

Master cylinder

35, 36 Wheel cylinder

Claims

A brake fluid pressure control device that is incorporated in a fluid pressure path from the master cylinder (33) to the wheel cylinder (35) and performs increase / decrease control of the fluid pressure supplied to the wheel cylinder (35) based on a command from the electronic control device. Because
A piston pump (5), a pump driving motor (3), an eccentric cam (4) which is rotated by the motor to operate the piston pump (5), and the wheel from the discharge port of the piston pump (5) A pressure-increasing solenoid valve (6) arranged in a hydraulic pressure supply path to the cylinder (35) and a pressure reduction arranged in a hydraulic pressure discharge path from the wheel cylinder (35) to the suction port of the piston pump (5). Electromagnetic valve (7)
The piston pump (5), the eccentric cam (4), the pressure increasing solenoid valve (6) and the pressure reducing solenoid valve (7) are connected to a master cylinder port (9) and a master cylinder port (9) and a wheel cylinder ( 35) In a brake hydraulic device built in a housing (1a) having a wheel cylinder port (10) connected to 35)
The piston pump (5) is installed in a single number, and when the piston pump (5) is mounted on a vehicle, the cam chamber (11) of the housing (1a) in which the eccentric cam (4) is accommodated. A brake fluid pressure device, wherein the brake fluid pressure device is arranged in a standing posture below.
The piston pump (5) is incorporated in a pump assembly hole (12) provided in the housing (1a) so as to open on the outer surface facing the lower side of the housing (1a), and the pump assembly hole (12) The brake fluid pressure control device according to claim 1, wherein the opening is closed with an end plug (13).
The brake hydraulic pressure control device according to claim 1 or 2, wherein the pump assembly hole (12) is formed in a hole that opens on a lower surface of the housing (1a) and extends vertically upward from the lower surface.
A brake fluid pressure control device that is incorporated in a fluid pressure path from the master cylinder (33) to the wheel cylinder (35) and performs increase / decrease control of the fluid pressure supplied to the wheel cylinder (35) based on a command from the electronic control device. Because
A piston pump (5), a pump driving motor (3), an eccentric cam (4) which is rotated by the motor to operate the piston pump (5), and the wheel from the discharge port of the piston pump (5) A pressure-increasing solenoid valve (6) arranged in a hydraulic pressure supply path to the cylinder (35) and a pressure reduction arranged in a hydraulic pressure discharge path from the wheel cylinder (35) to the suction port of the piston pump (5). Electromagnetic valve (7)
The piston pump (5), the eccentric cam (4), the pressure increasing solenoid valve (6) and the pressure reducing solenoid valve (7) are connected to a master cylinder port (9) and a master cylinder port (9) and a wheel cylinder ( 35) In a brake hydraulic device built in a housing (1a) having a wheel cylinder port (10) connected to 35)
The piston pump (5) is installed in a single number, and when the piston pump (5) is mounted on a vehicle, the cam chamber (11) of the housing (1a) in which the eccentric cam (4) is accommodated. A brake fluid pressure device, wherein the brake fluid pressure device is arranged in a standing posture above.
The pressure-increasing solenoid valve (6) and the pressure-reducing solenoid valve (7) are arranged on the side of the piston pump (5) in parallel with the axis of the eccentric cam (4), and this pressure-increasing solenoid valve (6) The pressure reducing solenoid valve (7) and the piston pump (5) are communicated with each other through lateral holes (14 -1 , 14 -2 ) provided in the housing (1a), and the master cylinder port (9) and the wheel cylinder port (10) are provided at a position opening on the outer surface facing upward of the housing (1a), the master cylinder port (9), the pressure increasing solenoid valve (6), and the wheel cylinder port (10) and the pressure-reducing solenoid valve (7) are connected to each other through vertical holes (15 -1 , 15 -2 ) provided in the housing (1a) with vertical holes (15 -1 , 15 -2 ). The blur according to any one of claims 1 to 4. Gas-liquid pressure control device.
The brake hydraulic pressure control device according to claim 5, wherein the pressure increasing solenoid valve (6) and the pressure reducing solenoid valve (7) are arranged symmetrically on the left and right of the piston pump (5).
The solenoid valve for pressure increase (6) and the solenoid valve for pressure reduction (7) are mounted on the outer surface (f1) perpendicular to the axis of the eccentric cam (4) of the housing (1a), and this solenoid valve is mounted. The brake fluid pressure control device according to any one of claims 1 to 6, wherein the motor (3) is attached to an outer surface (f1) of the housing.