JPS584658A - Liquid pressure controller of anti-skid device - Google Patents

Abstract

PURPOSE:To eliminte kickback under usual state and reduce the size of an accumulator by opening a check valve to comunicate a master cylinder and the accumulator, when the ccontent in the accumulator is stored up to a certain level. CONSTITUTION:When a contro pressure is increased, a cotrol piston 22 is forcibly moved right to trigger check valve 5. Responding to locking of wheels, a liquid pressure control valve 6 is actuated to discharge brake oil into a reservoir 14. A pump 16 operates on the liquid for storage in an accumulator 19. Since the check valve 5 is kept closed, there is no kickback against a master cylinder. When the storage in the accumulator is increased enough, a piston 19a is moved to open the check valve 5 and the surplus is fed back into the master cylinder. The accumulator may be therefore reduced in size.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a brake cylinder C of a device during wheel play depending on the H-rolling state of a wheel of a vehicle or the like.
;Relates to a hydraulic pressure control device C for use in an anti-slip brake system that controls the transmitted brake fluid pressure.

In the conventional anti-skid mounting pressure control device, the relationship between the mask cylinder and the brake 7 cylinder of the wheel play device is:
Upon receiving instructions from the control unit, the wheels are placed and evaluated.

a hydraulic pressure control valve that controls the brake hydraulic pressure of the brake cylinder; and a non-return check that is disposed at the junction between the hydraulic pressure control valve and the first staff cylinder, and whose forward direction is from the mask cylinder to the hydraulic pressure control valve. Control C of the valve and the slI housing pressure control valve; lower the brake fluid pressure*.

A reservoir for storing brake fluid discharged from the brake cylinder through the hydraulic pressure control chamber #pressurizes the brake fluid in the reservoir, and connects the check valve and the hydraulic pressure control valve t!
jI! Continuing pipe C: There is a device equipped with a hydraulic pump for reflux and an achiemulator connected to the discharge port of the hydraulic pump.

Regarding the above-mentioned device, the applicant filed a patent application in
As proposed in No. 5-2623g, such a device t
2 Therefore, hydraulic pump ≦: More pressurized and 9 plays? The liquid flows into the liquid pressure generation chamber of the mask cylinder.

It is possible to prevent the piston of the mask cylinder from being pushed back and therefore the brake pedal from causing a phenomenon commonly known as kickback.

In other words, the above-mentioned device E2 can relieve the driver of the discomfort or anxiety that occurs when the brakes are activated due to anti-skid control, but when the anti-skid control is activated, If the friction road surface causes an emergency I: slippery road, it is necessary to reduce the brake fluid pressure in the wheel player device from a sufficiently high pressure to almost zero. It is necessary to store a large amount of player fluid in an accumulator (-), which is discharged from the intermediate device. Therefore, especially in Daisei vehicles, a large amount of fluid is discharged from the brake device, and it is necessary to make the capacity of the brake system sufficiently large. There was, and the pipes were becoming larger.

In the above-mentioned Japanese Patent Application No. 55-26239, the present applicant further proposes that in the above-mentioned device C, a throttle passage is provided between the input port side passage and the output side passage of the check valve to bypass this check valve. However, after releasing the brake, 1:
The brake roller 7 prevents residual pressure from remaining on the cylinder side 62. That is, 1: A check valve with a normal structure requires a small opening pressure in order to open its fP. This ninth f-nip play J? 7 cylinder @ 1: Applying residual pressure C
: However, Special I: Wheel I: If the installed brake device is a disc brake, brake cylinder C: If even a small amount of residual pressure remains, a brake dragging phenomenon will occur.

There is a risk of significantly increasing wear and tear on the friction members of the disc brake. Such a risk is eliminated through the above-mentioned throttle passage f2, and the residual pressure in the brake cylinder after the brake is released quickly becomes I: zero C;.

The flow area of the throttle passage can be reduced by two times compared to the flow area of the pond pipe, so the above-mentioned back-back phenomenon during anti-skid control can be reduced by two times as compared to the flow area of the pond pipe. I am made to do so. No. 1: This cannot be reduced to light and sound, and Driver C: Therefore, there are some people who feel uneasy and uncomfortable even with the slightest back-up.

Further C: If a throttle passage is provided to bypass the check valve t,
The above-mentioned Achiemulator is delayed with the master 7 cylinder, and the pressure fluid generated in the mask cylinder flows into Achiemulator C and is consumed. As this consumption increases,
The amount of fluid supplied to the wheel brake device 52 becomes insufficient, and the brake fluid pressure does not rise sufficiently. Therefore, in order to prevent this flow into the Akie Emulator, it is necessary to set the set pressure of the Akie Emulator higher than the maximum hydraulic pressure generated in the mask cylinder. Ninth, in the case of the type in which the set pressure of the accumulator is given by the tension of the spring, the set tension of the spring needs to be increased, so the spring becomes larger and the entire hydraulic pressure control device becomes larger. , and its weight was also large.

The present invention has been made in view of the above-mentioned points, and it is possible to make the Akiemulator smaller than the conventional one, increase the amount of kickback, and provide the driver with an extremely good pedal feel without causing any kickback phenomenon during normal anti-skid control. Hydraulic pressure control device for anti-skid device that can be applied to f#tt-
The purpose is to provide. According to the invention, this purpose is to control the brake fluid FE of the brake cylinder in response to a command from a control unit (control unit) which is arranged between the mask cylinder and the player cylinder of the wheel brake system and evaluates the skid state of the wheel. a hydraulic pressure control valve for controlling the 1: disposed between the hydraulic pressure control valve and the mask cylinder;
A check valve whose forward direction is from the mask cylinder to the hydraulic pressure control valve, and control 1 of the hydraulic pressure control valve: When lowering the brake hydraulic pressure, the control is performed from the brake cylinder via the hydraulic pressure control 9F. A reservoir that stores the discharged play aP1fi, and a pipe C that pressurizes the brake fluid in the reservoir and connects the check valve and the hydraulic pressure control valve: a hydraulic pump that circulates the fluid.

The hydraulic pump is equipped with a hydraulic pressure control system C for the anti-skid device, and the brake fluid in the accumulator # is accumulated at a predetermined level.
c4t, a hydraulic pressure control device for an anti-skid device, characterized in that it is provided with a valve device that communicates the master 7 cylinder side of the check valve with the hydraulic pressure control 9fW of the check valve, f
2, i1 is formed.

The following description will be made based on a practical example C illustrated with two bond strips according to the present invention.

Carp 1 diagram is Anna Skid ig by m1 example! Draw a piping system diagram for mowing both rear wheels of the ripple hydraulic pressure control device. 1) has a known structure and is driven by a brake pedal (2) C2. The first hydraulic pressure generation chamber inside is connected to a front wheel piping system similar to that of the hydraulic pressure control device shown in FIG. 1 via arrangement t(3). Second hydraulic pressure generation chamber f of mask cylinder (1)
Second, the pipe (4) is connected m, and this is the pressure liquid supply pipe (4a
) and the pressure liquid return pipe (part) (branched into two.Pressure liquid supply pipe +4m) are shown in the following 6: Valve device to explain its details -, *Pressure control valve side pressure liquid supply pipe (4C) The 3-position electromagnetic switching valve (6) (:, !i) is connected through the 3-position solenoid switching valve (6).

゛ 3-position electromagnetic switching-ff (6) E: Therefore, is the hydraulic control valve etIf? .

The outlet is connected to the rear wheel (7) through the pipe (4d).
(8) plexi, ring (9) Ql (= J
*Continued. The outlet of the pipe (4e) is connected to the pipe (4e).

This reservoir (b) is a main body (14c) having a cylinder hole.
), upward by a relatively weak spring (14b) 1:CFig.C
It consists of a piston (14a) which is energized (rightward) and sealed by a seal ring (-) and fitted into the cylinder hole (two-finger movement), and the piston (14a) and the main body (14b) I: Therefore, a chamber is formed that passes through pipe (4e) and pipe (4e). The brake fluid is temporarily stored in the reserve chamber C of the reservoir Q4.

The pipe (4e) is further connected to the suction port 1 of the hydraulic pump (A) driven by the motor aηC2, and the hydraulic pump (
The discharge port of (a) is connected to the valve device (I), which will be described in detail, via a pipe (4f).

On the other hand, the above-mentioned pressure liquid return pipe +ah) I; is connected to a check valve ring whose forward direction is from the brake cylinder (9) αQ to the master 7 cylinder (1), and these are connected to the rear 11t (7 ) (A) brake cylinder (9) QO
I: 4-bale wheels connected (7) I) t: is their rotational speed g! A wheel speed seventh wheel Qη (b) is provided to detect C; these outputs are supplied to a control unit (L1g=this control unit) Q.
l includes a known circuit structure W.

The wheel speed is determined by receiving the output from the wheel speed sensor (b) (2).

Deceleration, acceleration, slip ratio, etc. are calculated, and a hydraulic pressure control valve control signal St- is generated based on these calculation results C:. This control signal S is supplied to the solenoid (6a) of the 3-position electromagnetic switching valve (6). 3-position electromagnetic switching box (6)
is configured such that the voltage of the supplied control signal S takes on one of the three digits tA%B%C. That is, the control signal S
When the voltage is O, therefore, when no voltage is applied, the first position A is the brake applied position. In this position, the mask cylinder (1) II, that is, the fourth side of the valve device, and the brake cylinder (9) 00 II are placed in a delayed state. When the voltage of the control signal S is "P", that is, when the brake holding signal is generated, the second position B is assumed as the holding position during play.In this position, the mask 7 cylinder (1) Between the four sides of the brake cylinder (9) and the brake cylinder (9)
)4 side and V-bar (b)
lc: To be placed.

Further, when the voltage of the control signal S is Ql'', a release signal is generated during play, and when the control signal S is at a level of Q1, the brake takes the third position C, which is the brake release position. Now, the mask cylinder (1) side and the brake cylinder (9)
There is a state of isolation between him and Rinko.

Brake 7s/da (9) DI II and reservoir (b)
There is a delay between the brake cylinder (9
) The brake pressure fluid of o4 is connected to the reservoir (H) via the pipe (4e
) t- is discharged through.

Further, from the control unit (to), a control signal S
A drive signal generated when is 1 or Ac: is supplied by a motor, although not shown. This drive signal is configured so that once it is generated, it continues during anti-skid control.

Next, the configuration of the valve device connected between the master cylinder (1) and the hydraulic pressure control valve (6) will be explained.

The valve device (2) has a check valve part (5) and an emulator part (6).
), and C2 is a stepped hole through the valve body which integrates these, into which a lid body having an opening ■ is screwed, and the other axis C2 is a lid body having an opening. (The bracket is screwed on.A Φ 2 mulator part (6) (7 cylinder holes in 2 holes (19
c) Sole ring C; Cooler piston (
19a) is slidable. Spring (19b) is fitted and tensioned between the lid body and body.
The piston (x9g) is in contact with the stepped part of the valve body (the figure shows the state when the brake is not activated).
, the space formed by the lid body and the valve body (11g) (
19d) communicates with the atmosphere through the hole (2) in the lid body and serves as an air chamber.

The check valve part (5) @ζ of the piston (19m) has a mating body screwed thereon, and the bottom wall St - the valve body which can slide through the bottom wall St - is supported by this cabinet. An abutting member C24m) is fixed to one direction C of the valve body, and is configured so as to be able to abut with the bottom part of the casing. The valve body 4 is energized to the right between its tip and the casing C: the tensioned valve spring 4F: the control piston 111 having a cruciform cross-sectional shape.
It is in contact with the left small diameter part of. The control piston (2) is fitted with two pairs of cylinder holes (22a), and is movable (C), fitted, and the spring (≦) stretched between the control piston (22a) and the lid body (22a). It is energized and comes into contact with the stepped portion of the valve body. The space (22b) formed by the control piston 11m, the lid, and the valve body communicates with the atmosphere through the opening (2) of the lid, and serves as an air chamber.

A hydraulic pressure force is formed between the piston (19a) of the middle humerator part (6) and the control piston of the check valve part (5). Nine people (4
0m) with the master 7 cylinder (1),
On the other hand, the lower wall part C of the valve body circle; the formed output port (+Ob)
It communicates with the input port of the hydraulic pressure control valve (6) and the discharge port of the hydraulic pump via.

A taper is formed on the inner wall of the valve body in the hydraulic pressure chamber (center part C), and this taper circle acts as a valve seat for the valve body. It is separated from this valve seat, and communicates the input port (40a) with the output port (40b).The tension of the above-mentioned spring (19b) is the highest in the trout (19b). , followed by l!ju, which is the largest, and one law which is the smallest.

Although the hydraulic pressure control device according to the present invention is constructed as described above, it will be explained based on the following explanation.

It is now assumed that a car equipped with this hydraulic pressure control device is traveling at constant speed and the brake pedal (2) is depressed.

At the beginning of depressing the pedal (2) during play.

(No deceleration signal or slip signal is obtained in Ll) (control signal S is 0).

The 3-position electromagnetic switching cell (6) is in the play middle position A, and the 1st cell chamber 4 is also in the illustrated state C: Therefore, the brake 'e from the master cylinder (1) is connected to the conduit (4 m). , Valve device (transfer) input port (40m), Hydraulic pressure gill,
Output port (40b).

through the brake cylinders (9) of the wheels (7) (11).
) Q□ E; To be swept away. As a result, the wheels (5 maro) (
5b) The brakes begin to be applied.

On the other hand, valve device 9I! 11: The hydraulic pressure of the brake fluid flowing in through the input port (40m) is controlled by the control piston.
This fluid pressure reaches a constant value of 5, for example, 10 m4/j (
The cross-sectional area of the large diameter part of the control piston law and the tension E of the spring 111: are determined accordingly) When the control piston 4 reaches 12 times, the control piston 4 begins to move to the right. I sympathize with this: 9P body - Momasu spring rule ≦
It is energized and moves to the right, moves a distance @L, and is seated on the valve seat -C: From then on, the reversal valve part (5) is hydraulically controlled from the mask cylinder side ff1 (41)llll: It functions as a check valve whose forward direction is the forward direction, that is, the brake fluid from the master cylinder (1) passes through the input port (401).

Valve body ■C2 acts to contract the square, 5? Body Cut-
It is moved away from Masuza Shinjo and flows to the output port (40b).

Play from the output port (40b) side *ii is this check 5f
It is blocked by s(5)C2.

The pressure from the mask cylinder (1) is applied to the valve device)
The wheels (
1) (8)'s brake cylinder (9) QOl; added, wheel (7) body) (two brakes are applied,
Eventually, when the wheel (7) u) reaches a predetermined deceleration or slip rate C:, the control unit (2) generates a control signal 8 called "A" or "P", which is applied to the hydraulic control 9F (6).
) of nonnoid (8a) E':, supply. This f;
The control valve (6) takes the position pipe C or B, and the communication with the mask cylinder (1) and the brake cylinder (9) @ is m.
cut off When the hydraulic pressure control valve (6) takes the position B, the brake hydraulic pressure to the brake ring (9) (10) is held constant, but when the hydraulic pressure control valve (6) takes the position C, rItt- When C2 is taken, the outlet of this control valve (6) communicates with the brake ring (9)H, and the hydraulic pressure control valve (6) and pipe (4e) are connected from the brake cylinder (9) (6). The brake fluid then flows out of the reservoir Q41.This reduces the brake fluid pressure to the brake ring (Q), but the hydraulic pump (to) receives the control signal 8 from the control unit (2). Pivoting starts when the temperature reaches P or 1-, and the brake fluid in the reservoir α is pressurized and discharged to the output port (40b) of the valve device 1cXJ. At this time, the valve device) Valve part (5) is already 6
; Since it works as a check valve, the discharge pressure of the hydraulic pump (2) is not transmitted to the master/linda (11), that is, the brake pedal (2) do not have.

The hydraulic pressure discharged from the hydraulic pump (to) is the accumulator part QIO spring tt9b) tv setting value, N, tc2004
/cd, the piston (19a) moves to the left and starts accumulating liquid during play. The amount of brake fluid accumulated in this accumulator m (to) is the piston (19 m)
The amount of movement C is proportional to the displacement, but this amount of movement is determined by the discharge pressure f of the hydraulic pump (to). The bottom wall of the donor body fixed to the 9P
End of body L14 @ 1: Fixed contact part (z4a)
In other words, in normal anti-skid control, the piston rt9a) does not move as much as the abutment part (z4a) is in contact with the housing.
From the distance wL to the bottom wall of , the distance from the 9f body to the square circle is 1Ill! The piston (19a) does not move beyond the value (L, -L,) minus L, and therefore the check valve 5 (5) always functions as a check cell and prevents the hydraulic pump from moving. ) is not applied to the mask cylinder (1) r=.

When the skid state of the wheels (7) and (8) is released and the control signal 8 from the control unit (to) is '''O# (=), the hydraulic pressure control fP (6) takes the position of the person again, and the 9F
Device (2) side and brake ring (9) 0041m
Is it possible to communicate all the information stored in the accumulator S (to) during play? [is player cylinder (9) QQ-\
is supplied, and the brake pressure at the head of cylinder (9) increases again during play.

Pregi pedal (2) T-Did you press it? ik% hydraulic control valve (
6) takes the position A, B or C depending on the magnitude of the control number 8 from the control unit (2) and increases, holds constant or decreases the brake pressure in the brake cylinders (9) and (2). By repeating the action, the driver releases the attraction to the brake ring (2) when the vehicle eventually reaches the desired speed or stops. With this release, the brake pressure in the master cylinder (1) is low) and the brake fluid from the brake cylinder (9)01 passes through the check valve Ill and the pressure fluid Af & pipe (4h) to the mask cylinder (11 On the other hand, in the cell i!fjt, 4C2, when the brake pressure of the master 7 printer (1) becomes smaller than the set tension of the spring wheel, the energizing force C of the control piston sun cover spring; It moves further to the left and becomes the shape WA shown in the figure.

In other words, the check valve part (5) is in an open state, and the light sound C-play fluid is reversed from the player 7 ring (9) until the brake pressure in the brake cylinder (fil) 00 becomes zero. Gas flows back through the mask cylinder (1) through the stop valve (5).In other words, no residual pressure remains in the brake cylinder (@) (6).

The above is the case of normal anti-skid control, but the first-order f
2. If the car moves from a high friction road surface during control to emergency C; slippery road ai, ice burn C; two cases will be explained using C.

In such a case, the brake fluid pressure in the brake cylinder (9) needs to be reduced to almost zero in order to prevent the wheels from locking due to high pressure.For this reason, the fluid pressure control ff (6) through the brake cylinder (
9) A large amount of brake fluid is discharged from (2) to the reservoir (b), 1 g, and the discharge pressure of the pressure pump 011 becomes extremely high. This allows the piston (1) of the accumulator section (to)
The amount of movement exceeds 91). Therefore, the piston (19
i) The bottom wall of the fixed casing and the square body
@(248) comes into contact with the 1 square body and the valve springs to the left and is moved against it. This C: check valve 11
(6) is open, input port (40m) and output port n1b
) is delayed. Therefore, after opening, the discharge E of the hydraulic pump So
E waves are sent to the master cylinder (1), and when the control signal S from the control roll unit (2) is "0" C, brake fluid is released from the mask cylinder (1) and the accumulator section (6) of the valve device 4. is supplied to the brake cylinder (9)(2)C; through the hydraulic pressure control valve (.), and the brake hydraulic pressure increases. Even if the car is running on ice snow, the discharge pressure of the hydraulic pump (2) will remain normal without exceeding the amount of movement t!L, t of the piston (19m) of the accumulator section (6). In other words, when the car moves from a high-friction road surface to a low-friction road, the brake fluid pressure in the brake cylinder (9) is reduced from a sufficiently high value to almost zero. In the case S: only the check 5f1 part (5) of the valve device tA is opened. The valve portion (5) operates as a check valve.

Next, six embodiments will be described with reference to FIG. 2, with reference to FIG. , and their explanation will be omitted.

In this example, the above-mentioned Example 1: 5? The accumulator section (2) of the fourth shell is an independent structure, and the check valve section (
C instead of 5): A normal check valve (5) and an internally piloted 7-can valve (8) are used. The OEE liquid supply pipe (4a) from the mask cylinder (1) is the pipe (4g)
Pipe (4b) and C: are branched, pipe (4g) is connected to output port C of 7-can 9P, and pipe (4b) is connected to input port C of check valve (5). Ru. The input port of the sequence valve (5) is connected to the accumulator) and therefore the discharge port of the hydraulic pump, and the output port of the check valve (5) is connected to the conduit (4C).
CI! Continued. 7-The spring force for opening the can valve is thicker than the setting value of the accumulator a groaning spring (x9b) l111
It has been g.

When the hydraulic pressure in the accumulator (to), that is, the discharge pressure of the hydraulic pump, exceeds the predetermined value between the Kukens valves, the 7-case valve 1111 opens. In this way, in this embodiment, the allowable brake fluid accumulation amount in the accumulator section is set to #! In the first embodiment, the detection is changed from the amount of movement of the piston (19a) to the brake fluid pressure in the accumulator (2).

It is clear that the same effect as in the first embodiment can be obtained with the above-described configuration C. will not give a kickback to
Tari Brae 1? / Linda (9) When the QO brake fluid pressure is reduced from a sufficiently low value to a value close to zero, only C2 opens between the sequence valves and the hydraulic pump (4 ) is sent into the master 7 cylinder (1). Therefore, similar to the first implementation 5:
The volume of the accumulator a9 can be configured to be as small as possible, and the mask cylinder (1) and the accumulator part are always C: compared to the conventional device in which the delay is delayed. can be set sufficiently small, making it possible to downsize the spring.

Embodiment 1 of the present invention has been described above, but the present invention is of course not limited to this. Technical idea 1 of the present invention:
Various modifications are possible based on this.

For example, in the first embodiment above, the control piston circle.

The space (22b) formed by the lid body and the valve body circle g;
) is used as an air chamber, but it may also be used as a hydraulic pressure chamber.

In this case C; is, for example, the control piston l! lt - A stepped piston with different pressure receiving areas on the left and right sides, the above hydraulic pressure chamber is delayed with the master 7 cylinder, and when the brake hydraulic pressure of the mask cylinder (1) reaches a predetermined level, it is moved to the right. Just supervise.

Further, although the above embodiments have been described as being applied to a four-wheeled vehicle, the present invention can also be applied to a two-wheeled motor vehicle.

Further C two again. In the first embodiment, the permissible movement amount of the piston (19 m) of the accumulator part (6) is detected by detecting the contact M1 between the contact part (24 m) and the bottom M part of the adult field from C;
Sh.

Movement of the piston (19m) C; from the valve body eat square II (
≦2, but this f: instead,
The allowable travel distance of the piston (19m) is determined by the accumulator section (
6) Detected by the limit switch provided, this detection signal C excites the plunger solenoid and moves the valve body directly connected to the plunger C.
2, or from this detection value No. 2, instead of the no-kense slur f'tllllll in the second embodiment, CL may be used to open the electromagnetic valve 5f+ used.

As described above, in the hydraulic pressure control device for an anti-skid device of the present invention, when the brake fluid in the connected accumulator reaches a predetermined accumulated amount, the hydraulic pump discharges g4 The relationship between the mask cylinder hydraulic pressure control valve and the master 7 ring (: 1 With normal anti-skid control, not only is the pedal feeling extremely good, but the accumulator is also smaller than the conventional one, making it 5 liters.

[Brief explanation of the drawing]

FIG. 1 is a piping system diagram of a hydraulic pressure control device for an anti-skid device according to Embodiment C of the present invention, and FIG. 2 is a piping system diagram of a hydraulic pressure control device for an anti-skid device according to a second embodiment F of the present invention. It is a piping system diagram. Figure C: Set aside. (1)・・・・・・・・・・・・River・・・・・・Mark・
River Master cylinder (4m)・・・・・・・・・・・・
・・・・・・・・・・・・ Pressure liquid supply pipe (5)...
・・・・・・・・・・・・・・・・・・・・・・・・
・・・Check valve part (5)・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・Check valve (6...
・・・・・・・・・・・・・・・・・・・・・・・・
・・ Hydraulic pressure control valve (9) αQ・・・・・・・・・・・・
...... River... Cylinder in play @...
・Four songs・・・・・・Four sides Control unit Q
4)・・・・・・・・・・・・・・・・・・・・・
・・・・・・Reservoir (g)・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・ Hydraulic pressure /
)...Song...... Old...
・Yumureta club shout in γ・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・5PM! i place 11
1・・・・・・・・・・・・・・・・・・・・・・・・
・・・ Sequence valve agent Yasugi Iisaka

Claims (1)

[Claims] Connection between the mask cylinder and the wheel brake cylinder during play 1: A fluid that controls the brake fluid pressure of the mosquito play cylinder in response to commands from the control unit that is placed and evaluates the running condition of the wheel. Connection C between the pressure control valve, the cough pressure control valve, and the mask cylinder: A reverse valve that is arranged and whose forward direction is from the mask cylinder to the hydraulic pressure control valve, and a #1 hydraulic pressure control valve. When reducing the brake fluid pressure from the control port, the player fluid in the reservoir is pressurized and the brake fluid discharged from the rake 7 ring via the fluid pressure control valve is pressurized. A hydraulic pressure bonder for an anti-skid device includes a hydraulic bonder that returns the flow to a conduit connecting the check valve and the hydraulic pressure control valve, and an adP:L mulleter connected to the discharge port side C of the cough hydraulic pump. Control device C
; When the brake fluid in the # register reaches a predetermined accumulated amount (-), the master 7 cylinder side of the check valve # is communicated with the hydraulic control valve side of the check valve. A hydraulic pressure control device for an anti-slip device, characterized in that it can be provided with a valve device.