JPS60183253A - Anti-skid device - Google Patents

Abstract

PURPOSE:To prevent shortage of fluid in a master cylinder when anti-skid control is effective by making the pressure room of a toggle device which is attached to the master cylinder connected to a power fluid supply tube of wheel cylinders of front and rear wheels by means of an electromagnetic valve. CONSTITUTION:A master cylinder 1 with a fluid pressure toggle device has a master cylinder part 3 on the left and a toggle device 4 on the right of the main cylinder body 2 respectively. When a brake pedal is pressed, an input member 9 is pressed to move by a link member 12, and after closing an exhaust valve formed on the right side of a movable valve 97, supply valve is opened, and the first piston is moved to the left with fluid pressure and the second piston 20 is shifted to the same direction and high pressure of power fluid is generated. In this case, the pressure room 29 of the toggle device 4 is connected via an electromagnetic valve 117, to respective positions between pair of electromagnetic valves 110, 111, and between a pair of magnetic valves 112 and 113 in power fluid supply tubes 43, 44 for each of wheel cylinders 45a, 46a.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake device for a vehicle, and more particularly to an anti-skid device ``6''.

Conventionally, this type of cylinder has a mask cylinder that is connected to a wheel cylinder and has a pressure generating chamber all partitioned inside the cylinder cylinder by at least one piston, and a mask cylinder that is connected to a wheel cylinder and has a pressure generating chamber all partitioned inside the cylinder cylinder by at least one piston, and a mask cylinder that is connected to a wheel cylinder and that has a pressure generating chamber all partitioned inside the cylinder cylinder by at least one piston. a booster device that is introduced into the pressure chamber by actuation of a valve device and applies a full biasing force to the piston of the mask cylinder; and a booster device that is disposed between the master cylinder and the wheel cylinder and can be switched between a closed position and a shutoff position. Ml solenoid valve and the +z
＼ I+lJ F1'+ 4ha L", -+ Bko
--1n,,'! II ・) Car L /7) I'j
l b'r city-? A second solenoid valve that can be switched between a closed position and a relaxed position, and a Hiroko's judgment that can be used to command the two solenoid valves to completely monitor the behavior of the wheels and prevent the wheels from skidding during braking. A device equipped with a circuit is known.

On the other hand, although various types of mask cylinders have been adopted, all of them have input and output in a fixed proportional relationship, and the two types that have been recently adopted are
If a membrane-actuated mask cylinder (also called an ast-fill master cylinder or a quick-tick-up master cylinder) is used full-width, the following problems will occur.

In other words, normally, in a double-film actuated mask cylinder, the amount of pressure i discharged to the brake pipe is relatively large in the low pressure region and relatively small in the high pressure region, and the pressure increase ratio of the generated pressure is small in the entire low pressure region. In the high pressure range, it is made to be thicker.For this reason, the effective pressurizing area is increased immediately after the start of operation, and when the target pressure is generated and all this is maintained, the effective pressurizing area is reduced by 8tt. In addition, in a booster device that assists the operation of a mask cylinder, a pressure fluid in a pressure chamber is used to apply a moving force to a piston of a mask cylinder. The effective pressurizing area of the larger piston of Taking this into account, we found that when the desired pressure is generated and maintained within the mask cylinder, the effective external pressure area in the mask cylinder changes rapidly, so when the effective external pressure area is large, the pressure is almost the same. However, if the effective pressurization area is small, the pressure generated and maintained in the mask cylinder will be higher than the pressure in the pressure chamber of the booster.
Considering this, since the pressure generated in the mask cylinder is high, the second solenoid valve is fully activated by the release signal to reduce the pressure in the wheel cylinder, and then the rotation of the wheel is restored and the tightening signal is issued. If so, what is the pressure inside the wheel cylinder? In order to rise, it is possible to supply either pressurized liquid in the mask cylinder or pressurized liquid in the booster. In the former case, both the first and second solenoid valves may be placed in the closed position;
When the filling operation is repeated several times, pressure liquid is released inside the mask cylinder. Since the holding state is performed with a small effective pressurizing area, there is a problem in that the amount of liquid is insufficient.

For this reason, the latter method will be used, but since the pressure generated inside the mask cylinder is higher than the pressure introduced into the booster, if the two are communicated and filled completely, the pressure inside the mask cylinder will increase. The pressure liquid will flow back to the booster side, and even if the filling operation can be performed, a wasted stroke will occur in the mask cylinder.

Then, in both the former and latter cases, the effective stroke of the mask cylinder decreases with each pressing operation, and eventually reaches a full stroke, making further operation impossible and requiring the full double pressing operation. There's a problem.

Our entire purpose is to provide an anti-skid device that operates more effectively. According to the invention, this purpose is achieved by providing a mask cylinder which is connected to a pipe to a wheel cylinder and which is defined above a pressure generating chamber in the cylinder bore by at least one piston, and which receives pressurized liquid from an external pressure source. a booster which is introduced into the pressure chamber by actuation of a valve device in response to the operation of the input shaft and which fully exerts a biasing force on the piston of the mask cylinder; and a booster located between the mask cylinder and the wheel cylinder; a first solenoid valve that is switchable between a closed position and a cutoff position; a second solenoid valve that is disposed between the first solenoid valve and the wheel cylinder and switchable between a closed position and a relaxed position; The behavior of the vehicle is monitored and commands are sent to the two solenoid valves to prevent the wheels from skidding during braking?
The mask cylinder that provides the Kameko discrimination circuit and all the features?
, in an anti-skid device using a two-film actuated mask cylinder in which the effective pressurization area changes during pressurization, the pressure chamber of the booster is placed between the two electromagnetic valves to the electric light curve.
The 11th copper 1st part also works.) The 1st valve is contacted by the 1st valve and the 1st valve is shut off in response to the input command from the discrimination circuit. This is achieved by an anti-skid device configured to switch the second solenoid valve to the above-mentioned position and the third solenoid valve to a communication position between the pressure chamber and the two solenoid valves P.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A master cylinder equipped with a hydraulic booster equipped with an anti-skid device according to an embodiment of the present invention will be described below with reference to all the drawings.

In the figure, the master cylinder of an unembodied hydraulic booster A is indicated as a whole by (]J, and its cylinder body (
2), a mask cylinder part (3) is provided on the left side, and a booster part (4) is provided on the right side. A stepped hole (5) is formed in the cylinder body (2), the front end is a closed end, and the rear end opening is closed by a lid (6). The lid body (6) is fixed to the cylinder body (2) with a plurality of bolts (1 seal link (7) interposed between the lfj and the same bolt (lfj) to the toe hoard (not shown) to this hydraulic booster. The entire mask cylinder (11) is fixed.

A shaft-shaped input member (9) with a cup seat A-(+1) ffi attached to the rear end is slidably fitted into the center through-hole (8) of the lid body (6), and a spring θQ It is biased backwards.

(In this specification, the front refers to the left side in the figure,
Rear shall mean to the right. ) Also, a recess (1) formed at the rear end of the input member (9) receives the east end of the rod part a of the connecting member 04, which is connected to a brake pedal (not shown), and a rubber member (15a)
Extraction has been stopped. A pair of boots is fixed between the door section 07 and the lid (6) to provide dustproofing.

The stepped hole (5) of the cylinder body (2) consists of a large diameter hole part ◇no and a small diameter hole side, the large diameter hole part (L7) and the small diameter hole part ◇)
The first piston Q9 is slidably fitted over the entire area, and the second piston (4) is slidably fitted into the small diameter hole (end). The first piston 09 has a first large diameter part (21) and a second large diameter part c2 at the rear end, middle part, and front end, respectively.
21 (has a first large diameter part (the same diameter as 211) and a small diameter part), and a cup seal (241 (251t2[i+) is installed. Part (2
3), an auxiliary pressure chamber GA is formed between the second large diameter section (221) and the first large diameter section QD. part (21) and the lid body (
6), a boosting pressure chamber (29) is formed between the two. Of these auxiliary pressure chambers (27+, accumulator pressure chamber (support), and boosting pressure chamber f29), only the auxiliary pressure chamber (21) belongs to the mask cylinder part (3), and this pressure chamber (271k ++!; 1st piston 0
The AfJ half of the mask cylinder part (3) belongs to the mask cylinder part (3), and the details of this mask cylinder ↑<l ((3)) will be explained below.

The first piston a (bolt 431 at the front end of the piston) is screwed, a zokop-shaped splash receiver G3131 is engaged with the W1 part of this bore A-1 (33), and the shaft part is Ring-shaped spring holder (3 rims fit together, these spring holders G32) 2 piston kan's gota 11
．． 1, (・imitation 32)
Front end of ((pressure contact σ).
The above-mentioned cup seal face is attached to the small diameter part (23) as a title formed at the front end of the piston, and on the other hand, the large diameter ↑+l ((3G) of the rear end of the second piston lever A pressure generating chamber +40) is formed between the cup seal μs) and the stone handle.

In addition, a through hole (30) is formed in the small @ part 123) of the first piston 1J9) located behind the cup seal (26), and the hydraulic pressure in the auxiliary pressure chamber (27) is used to generate the first hydraulic pressure. room t
40), if the hydraulic fluid is higher than this ill
The lip of the cup seal (26) passes through the l hole (30) and the lip part of the cup seal (26) is opened to enter the ig pressure generation chamber (from the 1st hydraulic pressure generation chamber (407) Through hole (
301'C and into the auxiliary pressure chamber Qn. That is, a check force is formed by the limp portion of the cup seal (26) and the portion of the first piston 01, the small diameter portion C;3), where the through hole (30) is formed.

A cup seal (371) is also installed on the front end large diameter part (351) of the second piston σ, and a pressureless chamber ( 39) is formed, and this piston (sha) and cylinder body (2)
A second shielding pressure generating chamber (4I) is formed between the bottom wall portion of the second shielding pressure generating chamber (4I). The second piston ring has a spring receiver (4) fitted to its front end.
8) and the bottom wall of the cylinder body (2).
cReturn spring (47)
h →, 1 day 1 year ago... / The cylinder body (2) is formed with an output port that communicates with each of the first hydraulic pressure generation chamber t41 and the second hydraulic pressure generation chamber (40). is valley, pipe t4
41 (43, the first power valve (110) (112) described later
), Ki2 solenoid valve (111) (113) full valve and rear wheel +5
The first wheel cylinder (46a) is connected to the front wheel (fourth wheel cylinder (45a)).Although only one front wheel (46) and one rear wheel (46) are shown in the figure, it is connected to the other front wheel and rear wheel. It is assumed that t has a similar configuration.

A check valve similar to that described above is also provided between the second hydraulic chamber (4υ and the non-pressure γ).
A through hole (44) is formed in the front part 6 of the second piston 4, and the pressure is transferred to the second hydraulic pressure generating chamber (4υ). When the pressure is higher than the pressure, the hydraulic fluid flows into the second hydraulic pressure generating chamber (4υ) by opening the lip of the two-way seal 6D. The hydraulic fluid does not flow from the 27r!L pressure generation chamber (1υ through the through hole (44) into the no-pressure chamber 01. In other words, the lip portion of the cup seal (!61) and the front large part of the second piston cL Through hole (A4)
A check valve is formed by the part where the .

The earth wall at the front end of the cylinder body (2) has a boss portion 5.
1) is formed, and its fluid connection hole 6z communicates with the second fluid pressure generating chamber Uυ through the return hole 51 when the brake shown in the figure is not in operation, and is connected to the fluid through the supply hole (491't-). It is always in communication with the pressure chamber (31. Also, the liquid connection hole 62 is connected to the reservoir joint (541) via the 5th floor.
The cylindrical part 69 is press-fitted, and the flange part is interposed between the fixing member (g) and the grommet seal, and the downward protruding part (58a) of the fixing member is connected to the lateral reservoir joint of the boss part 521. A rubber tube is connected to the rubber tube connection mark (54) as shown by the dotted line, and communicates with the reservoir shown by dot 15.

A boss part (64) higher than the above-mentioned boss part 6J is formed on the earthen wall in the middle part of the cylinder body (2), and a multiple valve device whose details are shown in FIG. 2 is located below the liquid connection hole. t64)
is arranged, and this lower bottom hole fi! 11 is return hole 6υ
It communicates with the first hydraulic pressure generating chamber t41 through a valve, and constantly communicates with the auxiliary pressure chamber (2) through the supply hole 1 (1t).

In addition, the reservoir joint (6'D) is press-fitted into the upper part of the liquid connection hole (6th tank) through the grommet seal. The downward protrusion (5) of the fixing member
8a) Insert a screw (
The reservoir joint (6η) is fixed to the cylinder body (2) by fixing it with the fixing member 5. That is, the fixing member is the common fixing means for both reservoir joints (541 (671). A rubber tube is connected to the connection part (6 η as shown by the dotted line) and communicates with the reservoir shown by the dotted n. For the reservoir joint (6 η, the inner hole (70) is shown) However, the other reservoir joint 6a also has a similar shape and a similar inner hole.Furthermore, the flange portions of the reservoir joints (54) and (67) have a plurality of holes as shown in the figure. Both reservoir joints 541 are formed with protrusions 61) that engage with a plurality of recesses in the fixing member 1581.
(6η is firmly fixed to the cylinder body (2).

Next, the multiple valve device (
Refer to Fig. 2 for the details of 64). This valve device f54) consists of the first valve part (seven) and the second valve part (9), and these valve parts @σ3 are connected to the valve body ( 74)'.

A splash catch σ frame is fitted to the outer edge of the valve body σa, and a stop link E5 that engages with the splash catch (increase) and the valve body σ
The entire valve device is liquid-tightly fixed to the boss portion (liquid connection hole 64, splash plate 178) and the valve body by the seal ring punching in pressure contact with the downward taper portion (64a) of a. A first valve chamber decoy is formed between σa, and this valve chamber (7
Ball valve inside the bell (valve seat (74c) where Aya is formed on the valve body m
is seated. The ball valve (7e) is biased toward the valve seat (74) by a spring plate stretched between the spring receiver (78) and the valve body.
A through hole (74a) is formed, and this through hole (74a) communicates with a bottom hole portion serving as a second valve chamber formed below the valve body (74). Ball valve (76
), communication with the first valve chamber (79) is cut off.

A plurality of second passage holes (74h) are formed around the first passage hole (74a) in the valve body, and these communicate with the first valve chamber 4, and are usually connected between the valve bodies. Communication between the second valve chamber and the bottom hole Gω is cut off by the rubber valve member 311 fixed to the lower end of the first valve chamber.
The valve part (771 is composed of a valve (70), a valve body (74), a plate spring (7η), and a second valve part (C/3).
) is composed of a valve body (γ leakage) and a rubber valve member (811).

The first valve chamber (79) is located at the center opening (78) of the splash receiver (18).
a) The f valve is connected to the reservoir side at all times, and the bottom hole (65) serving as the second valve chamber is the return hole (6υ and supply hole t6Ul) as described above, and the k valve is connected to the cylinder body as described above. It communicates with the inside of the cylinder hole of (2). Also, it communicates with the inside of the cylinder hole of (2).
A throttle υ groove (74d) is formed in the lower peripheral edge of γ(1), and the bottom hole t65) serves as the first valve chamber (79) and the second valve chamber.
What do you mean by the diaphragm υ groove (74d) and the second through hole (74b)? 5, there is constant communication.

When the pressure in the bottom hole serving as the second valve chamber becomes higher than the pressure in the first valve chamber (79) by more than a predetermined value, the first valve portion (79) opens and the bottom hole as the second valve chamber (79) opens. The hole (65) and the first valve chamber (79
) and are in a free communication state. This valve opening pressure is caused by a plate (
The opening pressure of the second valve part (76) is determined by the strength of the valve seat (76) and the seating area of the valve (76) relative to the valve seat (74). 7
9) When the pressure in the bottom hole (65) serving as the second valve chamber becomes smaller than a predetermined value, that is, when the pressure in the bottom hole (65) serving as the second valve chamber becomes negative, the valve will open. It is configured.

Next, see Figure 1 again for details of the booster II 741S (4). Refer to and explain.

The first piston (191) is also one of the main components in the booster section (4), and the cylinder is located 14 cylinders above the above-mentioned Aguier and Murator pressure chambers formed on the rear four circumferences. The main body (2) has a boss part (83) y)' = shadow formed, and the connecting part opening (8.υ) is screwed into this. Boss part 3:3
) is provided with a check valve consisting of a reach valve (5) and a valve spring (8G), and is directed from upward to downward. The forward direction is the through hole (83a)' (the side of the pipe line (87) connected to the connecting member (84) through the valve can communicate with the Achiemulator Royal System. Pipe line L87). The accumulator is connected, and the discharge port of the hydraulic pump f911 is connected via a conduit (89) and a check valve (9t). non-return valve(
90) is the pipe line (87) from the discharge port side of the hydraulic pump t9υ.
The direction toward the side is k1ll-j direction. Further, the hydraulic pump (91) is driven by a motor (921), and its suction port is indicated by a dotted line.
The valve is connected to the reservoir 1b shown as a point. In other words, the reservoir is connected to the above-mentioned mask cylinder part (3).
) and the booster section (4) as a common reservoir of hydraulic fluid. Furthermore, as will be described later, it also serves as a reservoir for the anti-skid piping section (130).

A stepped hole (94) is formed in the rear part of the first piston 4 in the axial direction, and a movable valve body (97) is slidably inserted through this medium diameter hole (95) and large diameter hole (96). has been done. The front end of the stepped hole (94) is fitted into the medium-diameter hole (15) via the seal ring (99)'.The small-diameter hole (121) at the front end of the stepped hole (94) 122) ?Valve and auxiliary pressure chamber (communicated with leakage. 1] Valve body (97)
A rubber link (102) is interposed between the front end of the stepped hole (9 minutes) and the step between the small diameter hole (121) and the medium diameter hole (99). A through hole (97c) is formed in the body in the ill+ direction to align and communicate with the small diameter hole (121) of the stepped hole tn.Stepped hole (A of Oa) hole (95) A spring receiving link (dark) is provided in contact with the step between the large diameter hole (%) and the movable valve body t.
A valve spring (1 (g)) is stretched between the annular protrusion (97a) formed on the outer periphery of the valve body (97) and the movable valve body (97).
It is energized all the way to the rear.

Stepped hole t of first piston 09! 14) At the rear end opening, the sleeve (1, 04) has a seal link (103)', r
When it is installed and fitted, it is prevented from being removed by the stopper (105). n] The rear end of the valve body (!17) fits into the inner hole of the sleeve (104) and is slidable, and the rear end face with the rubber tube (106) attached to the input member (! 9) is formed on the front end face of the J-shaped projection (107) and faces the J-shaped projection (107) at a predetermined distance when the illustrated device is not in operation. That is, the movable valve body (97)
is an inner flange 'fjV+ (104a) whose annular protrusion (97a) is formed at the front end of the sleeve (104).
), its rearward position relative to the first piston 0gJ is regulated.

An input chamber a is formed around the middle part of the movable valve body (9t) in the large diameter hole (96) of the embossed hole (94), and this input chamber a is connected to the through hole (101) formed in the first piston α. )? <
The movable valve body (97,
A communication chamber is formed on the periphery of the rear end of the movable valve body (9r), which is connected to the groove (97b) on the outer periphery of the rear end of the movable valve body (9r), and the input member (
The groove (109) on the outer periphery of the front end of 9) serves as an i-valve and is constantly in communication with the boosting pressure chamber (to). The annular protrusion (97a) of the movable valve body 0η and the inner flange (104a) of the sleeve (104,) constitute a supply valve, which is closed in the illustrated state, but when opened, the input chamber a It communicates with the communication chamber, that is, the boosting pressure chamber (c). The rubber sheet (106) on the rear end surface of the movable valve body (97) and the annular projection (107) on the front end of the input member (9) constitute a push-out valve, which is not open in the illustrated state. , movable valve body (97)
(97C), a stepped hole (9/υ small diameter hole (121), a radial through hole (122)
) The auxiliary pressure chamber (271) is fully valved and the reservoir side and the booster pressure chamber 4 side communicate with each other, but when this is closed, the communication between them is circulated.The input member (9) is Although the spring Q (1 to jt) is urged rearward, the stopper (
108), its rear position is regulated.

Next, the anti-kid piping part (130) which is connected by piping between the mask cylinder (1) with a hydraulic booster constructed as above and the front wheel (in other words, the rear wheel) will be explained.

The second hydraulic pressure generation chamber (4υ, first
The hydraulic pressure generating chambers +40 are each connected to a first solenoid valve (110 bar 112) via a pipe (43(9)).
Solenoid valves (110) (112), front wheels (c), rear wheels (46)
A second solenoid valve (111) (113) is connected between the first wheel cylinder (45a) and (46a). In addition, the first solenoid valve (110) (112) and the second solenoid valve (111X
Check valves (118) and (119) are installed in the pipeline connecting
Pipe line (t23
7) is connected. The inlet of the third solenoid valve (117) is connected to the pressure chamber Q (t) of the booster section (4) via the pipe (lzO).
connected to. In addition, the second solenoid valve (111X113)
The discharge ports are connected to the reservoir (571) via a fourth solenoid valve (114X115) and a pipe (116), respectively.

12th second, third and fourth solenoid valves (110) (112)
, (111) (113), (117), (114) (1
15) is a 2-position t'fji valve with each solenoid (
110aX112a), (lla) (113a), (
117a), (114a), and (115a) can take two states depending on whether they are excited or not. Even if not shown, each output terminal of the anti-skid control circuit as an electronic discrimination circuit is connected to a solenoid (110a) (1
12a) (111a) (113a) (117a) (11
4a) (115a), each solenoid is energized with an output of @l#, and each solenoid is not energized with an output of 0''.Wheel speed attached to the front wheel (451, rear wheel (46)) - Based on the sensor's wheel speed detection signal, the anti-skid control circuit judges the skid state of the wheels and decides whether to fully apply the brakes, loosen them, or keep them constant. Depending on this determination, , an output of 1" or 0" is selectively generated at each output terminal.

The first solenoid valve (110X112) and the fourth solenoid valve (115
) is a so-called "on-off" type valve, and when the solenoid (110aX112aX115a) is not energized, it is in the A state shown in the figure, and the inlet and outlet are in communication.

Also, solenoids (110a) (112a) (115a)
When energized, the B state becomes 1 and 9, and the inlet and outlet are out of communication. The second solenoid valve (,111
Each solenoid (111a) (1
13a) and (l17a) are not excited, C as shown in the figure.
, on the state of E.

That is, in the second solenoid valve (111X113), the first ML
Magnetic valve (110) (112) side and front, rear wheels +451 l4
The third solenoid valve (117) is connected to the wheel cylinders (45a) and (46a) of
18Xl19) side and the reservoir mouth side are placed in communication, but the inlet and outlet, that is, the pipe line (120)
and the check valve (118x119) side are in a non-communicating state. When the solenoid (111aX113a) is excited, the second solenoid valve (111) (113) is in state D and 9. The inlet and the outlet are blocked, but the outlet and the discharge port communicate with each other. That is, the wheel cylinder (45aX46a) side of the front and rear wheels 1451l46) and the fourth solenoid valve (11
4) The (115) side is now in communication. Also, when the solenoid (117a) is energized, the third ? ij magnetic valve (
117) is in the state of F, and the inlet and outlet are placed in communication. That is, the check valve (118 bar 119) side and the pipe line (120) side are communicated. In addition, check valve (1
18) (119) are the first and second solenoid valves (110, 1 (112), (11) from the third solenoid valve (118) (119) side.
1) (113) The direction toward the tube 1g 111 is the forward direction.

The Kundem mask cylinder with a hydraulic booster according to the embodiment of the present invention ψ is constructed as described above, and its operation, effects, etc. will be explained next.

While the brake is not applied, the @ portion is in the state shown.

In this state, when the driver depresses the automatic brake pedal k, the connecting part system (6) moves forward and the input member (9) is pushed forward. Annular projection (107) at the tip of the manual system (9)
Rubber seam 1- (106) at the tip of the clear valve body T97+
to sit in a whirlpool. In other words, the υl volume valve is closed and the pressure chamber (29
) and the reservoir side are placed out of communication. When the input member (9) moves forward, the movable valve body (9η) moves to the left relative to the first piston 0 against the elastic force of the valve spring O [phase] and the comb ring (102). The annular protrusion (97) is the inner cutter flange (10) of the sleeve (104).
4a) Sit down. That is, when the supply valve opens, a pressure wave is transmitted from the input chamber a to the communication chamber l, the groove (97h) on the outer periphery of the movable valve body (97), and the groove (109) on the outer periphery of the input part (9).
k and flows into the output chamber (29). This allows the first
The piston 0 receives hydraulic pressure at the right end surface of its first large diameter portion O1l, producing a leftward movement force. Note that the motor (
921 is driven, and the hydraulic pump (921) is fully operated.Pressure fluid is accumulated at a predetermined pressure in the accelerator. The input chamber a has a through hole (110
) is used to constantly apply pressure in the achilleator pressure chamber (28).

As the first piston a moves forward, the input member (9) also moves forward, and the discharge valve is closed. The cup seal (26) attached to the first piston (one small diameter portion) is located at the return hole +
611, the first vVi pressure generation chamber (40) becomes sealed with respect to the first rule of the reservoir, but in order to fully compensate for the liquid loss on the wheel cylinder side, the first liquid generation chamber (40)
(The pressure of the engine hardly increases at the beginning of forward movement.

On the other hand, the pressure in the auxiliary pressure chamber (27) increases with the advance of the first piston α, and the pressure difference between the auxiliary pressure chamber (2 force and the first hydraulic pressure generating chamber (40) causes the hydraulic fluid to flow into the first piston 09. Through hole in the small diameter part (23), cup seal (26)
The lip portion of the liquid is deformed and flows into the first hydraulic pressure generation chamber (40).

As a result, the loss caused by the wheel cylinder connected to the output port of the first hydraulic pressure generating chamber (40) is compensated for at a speed of 79%.

When the pressure in the auxiliary pressure chamber (128) reaches the opening pressure of the first valve part (7'), the operation in the auxiliary pressure chamber (28) starts.
The liquid is supplied through the supply hole (60) and the bottom hole part jj+5 as the second valve chamber.
), the through hole (74a), the gap between the valve body (70) and the valve seat (74), and the valve body (79) to be guided to the reservoir side.

When the first piston 09 moves further forward, the loss on the wheel cylinder side has already been compensated for, so the first piston 09 moves forward.
i. The pressure in the pressure generation chamber (40), that is, in the wheel cylinder that is in contact with it, increases rapidly. Second piston (
4) also moves forward together with the first piston 09), but after the first piston (1'l) has moved forward, the "hydraulic pressure generating chamber" (
・As the pressure of 11 people begins to rise rapidly, the second piston (
In addition to the pressure difference after AiJ in 4), the first piston υi)
At the same time, the fluid loss on the wheel cylinder side is compensated for and the pressure in the second hydraulic pressure generating chamber (41) begins to rise rapidly almost at the same time as the first hydraulic pressure generating chamber IAII. 1. Second hydraulic pressure generating chamber (40) (The hydraulic pressure of 4υ increases equally. In this way, the desired brake is applied to the vehicle.

The state in which the desired brake is applied or the manual component (9
The hydraulic pressure Pd introduced into the input member ( ) is applied to the input member (
9) When the force and the force are brushed together, the pressure is P.
The force a exerts on the right end surface of the first piston (l) and the hydraulic pressure Pm generated by the first piston (t4G) are the first piston y, l-
The left r of the piston (19) does not reach the 1ili surface, but the force is balanced, and the first piston is stopped at 7, and the supply valve is also at IAj. 't ft that is, turning I valve body (97)
When the annular notch (97a) comes into contact with the lunge part (104a) on either side of the sleeve (104), the above-mentioned constant hydraulic pressure Pa or 41 is applied to the pressure (+2'l). There is.

In the two equilibrium states, Iol, the following equation 5 holds true.

F2Pa (-S, -8,) ・・・・・・・・・・・・
・・・・・・・・・・・・ (11PmXSm=PaX,
Sa・・・・・・・・・・・・・・・・・・(2 pieces, S4 is the input part (9), the cross-sectional area S3 of the rear end large diameter part (9a) is the input part An annular projection (10υ
seating surface on the rubber sheet (106), [3m is the cross-sectional area of the small diameter part (c) of the first piston α, and Sa is (the first
The first large diameter part of the piston α (the large diameter hole α into which the 2D fits)
The cross-sectional area of η is expressed as s − s, )′(ll−, respectively).

From the above (υ, equation (2)) / F first hydraulic pressure generation chamber f4 (1 hydraulic pressure k Pm', P
M=B.

Therefore, the following equation holds.

From the figure, it is clear that S > S, so it can be seen that the power is doubled.

When the driver returns the brake pedal to its original position to release the brake, the input member (9) moves back to the right under the pressure of the pressure chamber (c) and the spring force of the spring Ql. This causes the annular projection (107) at the tip to separate from the rubber sheet (106) of the movable valve body (97). That is, the discharge valve is opened (.

The pressure liquid in the pressure chamber holder is distributed through the groove (
109), flows into the auxiliary pressure chamber +271 through the η through hole (97) and the radial through hole (122)' of the movable valve body.

As the pressure in the pressure chamber (2) decreases, the pressure in the first hydraulic pressure generating chamber (4) decreases.
In response to the hydraulic pressure of Q and the force of the return spring (4'O), the first piston ← tin and the second piston head begin to move back to the right. Due to the backward movement of the first piston 4, the auxiliary pressure chamber (
The pressure in the pressure chamber (5) tries to become negative pressure, but this is due to pressure in the pressure chamber (2).
) and the inflow of hydraulic fluid from the reservoir mark. On the other hand, the first hydraulic pressure is generated (4Q also tries to become a negative pressure, but the hydraulic fluid that has flowed into the auxiliary pressure chamber (2) partially flows into the first piston (the small diameter part c!31 of the first piston). Through hole 001
The T-through 9 bends over the outer edge of the cup seal 4 and flows into the first hydraulic pressure generating chamber (6). Therefore, the negative pressure is compensated. The second fluid pressure generation chamber (4υ also tries to become negative pressure, but this chamber (
There is a supply hole (4g) in the 4υ, and a large diameter part 6 of the second piston ■.
51 through hole (44 holes), the outer edge of the cup seal c3η is bent and the working fluid flows in from the reservoir side. Therefore, the negative pressure is compensated. 2
After the valve part σ is closed, the working fluid passes through the throttle groove (74d) and gradually flows into the end of the auxiliary pressure chamber (2η) and the first hydraulic pressure generation chamber (41). and second hydraulic pressure generation chamber (
The pressure of 4υ becomes zero, and each part reaches the state shown in the figure. Note that the throttle groove (74d) is connected to the first valve part ffa and the second valve part σ4.
When the valve is closed, the auxiliary pressure chamber c! Does the volume of the working fluid in D change due to temperature changes? It also serves as compensation.

The above is a case where the vehicle is driving on a road with a normal coefficient of friction and the brake pedal is depressed moderately.However, if the vehicle is driving on a road with a low coefficient of friction, such as an ice slope, and the brakes are applied suddenly, the brake pedal In this embodiment, if there is a risk of locking, anti-skid control 2 is performed.

That is, when the brake pedal is depressed, the hydraulic pressure generation chamber (4
G (before the fluid pressure of 4υ reaches a certain value according to the input F
Then, the process of releasing the brake, holding the foot down, and applying the brake is repeated many times.

When the anti-skid control circuit (not shown) determines that the brake is applied too much, the first solenoid valve (110) (112)
and the solenoid (,
1loa) - (l13a) k is excited. Note that anti-skid control may be applied to each of the four wheels individually, but for ease of explanation, it is assumed that all wheels (45t461) have the same skid condition and are subjected to anti-skid control in the same way.

The first solenoid valve (110X112) and the second solenoid valve (111
X113) now assumes states B and D. Other solenoid valves (
Solenoid (114a) of 114) (115) (117)
Since Xl15a) (117a) is not excited, it is 1\ in the states A and E shown. The wheels (451t4Gl wheel cylinders (45a) (46a) are the reservoir 51
The pressure fluid in the wheel cylinders (45a) (46a) flows out to the reservoir 6η. This releases the brakes.

When it is determined that the over-applied brake has been released, the solenoid (114aX115) of the fourth solenoid valve (114X115)
a) is excited. Take state t from A to B. 1st, 2nd
The solenoid valves (110) to (113) are excited "1".

This causes the current hydraulic pressure to be contained within the shift wheel cylinders (45a) (46a). That is, the braking force is held constant.

When it is determined that the wheel speed has turned sufficiently, the third solenoid valve (
The solenoid (117a) of No. 1, 17) is energized and takes the state from E to F. The solenoid (iloa) (112a) of the first solenoid valve (110Xixz) is excited, but the solenoid (112a) of the second solenoid valve (111X113)
1UX113a) and fourth solenoid valve (114) (115)
The solenoid (n4a) (B5a) is demagnetized. As a result, the wheel cylinder (45aX46a) is not in communication with the reservoir 7) side and the hydraulic pressure generating chamber 141) of the master cylinder 7) part (3), but the third solenoid valve (11)
7), check valves (118) (119) and second solenoid valve (I
II) (11:U)? The valve is placed in communication with the pressure chamber (29) of the booster section (4).As a result, the pressure chamber (29)
Pressure fluid flows into the wheel cylinder (45F1% 46a), and the braking force increases again.

Anti-skid control times 1. j, 15 determines that the brake is applied too much, the solenoid (117) of the third solenoid valve (117) is demagnetized, and the second solenoid valve (111) (1
13) solenoid (111aX113a) is excited. Solenoid (
llOa, ) (112a) is the excited 1\. Wheel cylinder (45a) (4(]a) is the 4th
The pressure fluid is communicated with the reservoir (5η) through the sagging valve (04XH5)k, and the pressure fluid is discharged from the wheel cylinders (45a) and (46a) to the reservoir 6. This loosens the shibrage gear.

When 44J says that the over-stressing of the brakes has been released,
The solenoid (114) of the 4th tortoise valve (114Xl15)
a) (115a) is excited and the wheel cylinder (45
a) (46a) The beam is also cut off from the reservoir side, and the braking force is kept constant.

When it is determined that the wheel speed has sufficiently recovered, the third power valve (
117) solenoid I"' (117a) is energized,
Pressure fluid is supplied from the pressure chamber (29) of the booster 4 (4) to the wheel cylinders (45a) (46a), and the braking force increases again.

In this way, the brake force decreases, the brake force is held down, and the brake force increases several times in a short period of time to prevent the wheels from locking up. However, once the vehicle reaches the desired speed, , or when the vehicle stops, the pressure on the brake pedal is released, and the anti-skid control circuit also cuts off the power to the solenoid of the solenoid valve that was energized at that time.

That is, each solenoid valve (110) to (115X1.17)
takes the state shown. Wheel cylinder (45aX4.
The pressure fluid in 6a) is 2'ih (+1+valve (111)) (
113), first solenoid valve (NO) (112) k through 7
Fluid pressure generation chamber of star cylinder part (3) (401 (recirculated to 411, excess IJE)) hole t50) f
The oil is returned to the reservoir (5 points).On the other hand,
The pressure chamber (29) of the booster (part (4)) does not perform the above-mentioned anti-skid flill #'C. It is discharged to the reservoir (57) I', il.The braking force thus becomes zero.

6 when performing anti-skid control as described above.
．． Wheel cylinder (l+5a) (46
The brake force is pumped out to the reservoir 6 from the hydraulic power system 41i, but the brake force can be increased again by the booster system 41i.
i': ,, This is done by the pressure fluid supplied from the pressure chamber C1]) of section (4), and is not supplied from the manutan cylinder 75: S (3)'s hydraulic pressure generation chamber (,10) (41+). , the piston will not be overstroked due to insufficient hydraulic fluid in the hydraulic pressure generating chamber +401 (41).

Hydraulic pressure bonft t! +1) or an accumulator (pressure fluid is supplied from the candle through the open supply valve, so the fluid pressure does not drop.

In other words, it is possible while the brake is applied*! + When the annular protrusion (97b) of the valve body (resistance) is in contact with the inner flange (104a) of the sleeve (10-4), the pressure chamber C/
Pressure fluid flows from 9) to the wheel cylinders (45a) (46a).
The hydraulic pressure in the pressure chamber (C) decreases by moving J'lL out to J'lL, but the first piston 00 moves to the right due to this, and the i'' valve body (9-force annular protrusion ( 971 is g from the inner flange part (104a) of the sleeve (104).
IU is seated, and pressure fluid flows from input chamber a into pressure chamber tlE9)
It flows into the interior and is replenished. That is, input B(t d (
The input F to the booster section (4) and the moving force for the 1st piston (1! The balance between the hydraulic pressure and the reaction force exerted on the chemical piston (19) is maintained.

The actual embodiment of the present invention (q example) performs the above-mentioned action r', and has the following effects.

(1) The movable valve body (!) is cylindrical in shape, and the front side and the ■ side are seal rings T99)? The valve is fitted into the medium diameter hole (951) of the stepped hole (94) of the first piston 0. Therefore, the hydraulic pressure in the input chamber a is applied to the annular protrusion (97a) of the movable valve body 197. The amount pressed against the inner flange portion (104a) of the sleeve (104) can be made as small as possible. That is, the cross-sectional area i Sm on the front end side of the movable valve body 0η<the annular protrusion (97a) of the movable valve body (g) η.
Seating area 'k S, on the inner flange part (104a) of the sleeve (104) of If gold is f, the annular protrusion (97a) of the movable valve body (97)
is the inner flange portion (104a) of the sleeve (104).
The pressing force of k is (86-81) X Pi + f, and can be minimized by bringing it closer to the turtle. Therefore, the force required to open the supply valve by the supply valve input member (9) constructed in this way can be minimized, and the operation can be speeded up.

Conventionally, a steel ball was used in place of 7) of the columnar OJ valve body, and the force required to open the valve was equal to the seating area of the steel ball XPi and the spring force of the valve spring. The entire seating area received the full hydraulic pressure of input chamber a. Therefore, the force required to open the valve is large, making it difficult to operate quickly. However, according to this embodiment, the force required to open the valve can be made equal to the sum of the spring force of the valve spring and the elastic force of the rubber ring (102), so it is quick. can be greatly improved.

In addition, when performing anti-skid control as in this embodiment, pressure fluid flows from the pressure chamber (c) to the wheel cylinder (45).
Even if pressure fluid is supplied to aX46a), since the opening pressure of the supply valve is small, pressure fluid can be immediately replenished from the input chamber a side.

This makes it possible to cope with a decrease in braking force within a short period of time, and a rise during repeated repetitions of foot hold and rise.

(2) Movable valve body (9η annular protrusion (97a) f When the sleeve (104) is unseated from the inner flange (104), that is, the spring force that resists opening the supply valve causes the valve to times (coil spring) and rubber ring (102)
The viscosity coefficient or reduction coefficient of the reed and coil spring is small due to the spring force, but that of the rubber link (102) is large. If the spring force to resist opening the valve is obtained only by the coil spring, the input member (9) will move the movable valve body +97).
97) may move forward more than necessary, resulting in a flange and unstable control. However, in this embodiment, since the spring force of the rubber ring (102) is also resisted, the above-mentioned forward movement beyond necessity can be completely suppressed, and the input member (
9) Stable control can be performed even when a sudden force is applied to the device. Since τ1η (97b) in the housing acts as a restricting groove, sudden inflow of hydraulic fluid from the input chamber a is prevented, and hunting can be prevented even if l:.

(3) t11 When the outlet valve is opened, that is, the annular projection (i07) at the tip of the input member (9) is connected to the movable valve body (97).
When the valve is removed from the rubber sheet (106), the pressure fluid in the pressure chamber (29) flows through the through hole (97C) of the movable valve body J71, the small diameter hole (121) at the angle of the first piston, and the sleeve auxiliary hydraulic pressure chamber. It is refluxed to the reservoir (571) through η.The pressure chamber (2
) Pressure fluid? There is no special drain structure provided in the cylinder body (2) to return the water to the reservoir 6η. Therefore,
The configuration for this purpose has been simplified. In addition, conventionally, a passage was formed in the input member (9) for the flow to flow back to the reservoir 5D as a pressure release source for the pressure fluid in the pressure chamber (c).
The passage configuration in the housing leading to the reservoir 6n was complicated, and the total axial length of the device was increased, but in this embodiment, the configuration for pressure liquid return from the pressure chamber 291 is simplified, Moreover, the axial length of the device can be made smaller than that of the conventional device.

(4) The first solenoid valve (110X112) and the second solenoid valve (
111) (113) and the booster section (4)
Since the pressure chamber (3rd solenoid valve (117)' is installed between the 2nd valve and The 8-bar which supplies pressure fluid to raise the brake force again is gone, and the hydraulic pressure generation chamber (4 (11 (4D)
(1) #JJhi shortage 1 can be prevented.

1, when the brake lever is raised, the 1'61 magnetic valve (11
0) (112) is placed in a blocked state, so that pressure fluid is prevented from flowing back from the desire pressure generating chamber (4G (41) to the booster section (4).

Although the embodiments of the present invention have been described above, the present invention is, of course, not limited to these, and can be modified based on the technical idea of the present invention.

For example, in the above embodiment, 57,272 parts (104a) of the sleeve (out of 104) were used as the valve seat of the supply valve, but the step part was entirely formed in the inner hole of the first piston 05S, and this was used as the valve seat. Good too. Alternatively, the shape of the inner hole of the first piston may be changed to omit the sleeve (104). 4. In the following example, fd town valve body t9
7) (D = Gb5 end'li!I CD I'ji
+7 surfaces Ss and Q": f) fi Output valve N seating surface was made smaller than nine seating surface coffin S6 of 1 common supply valve, but movable valve body bm and input part # ( 9) 'c・11
It is also possible to do it four times. In this case, the force required to open the common supply valve (a) is comparable to the spring force of the valve head (9), making it possible to achieve extremely quick operability.

In the above practical example, the 4th city magnetic valve (4 (1, 4)
15) If the brake force f is to be kept constant by providing the
In \, the 47i, magnetic needle (114
) may be omitted entirely, and all υ and θ outlets of the second solenoid valves (111, 113) may be connected to the pipe (, 116). In this case, the second solenoid valve (111) (113) i+a valve (1
By cutting off the excitation of the brake valve (110X113) (the 1st solenoid valve (110X1)2 is energized), the braking force is switched to a constant state.

Furthermore, in the above embodiments, the anti-skid control was performed by repeating the braking force at low T, - foot hold, and rising again, but it may also be performed by repeating low], 14) and rising. In this case, for example, the 41i7 magnetic valve (, 11
4X115. ) is omitted, and the 1st turtle valve (110) (1
12) is the excited 1\, and the second solenoid valve (111] 113
) and the third solenoid valve (117) may be mutually energized and de-energized.

'-i In the above embodiment, the 31st L solenoid valve (1, 17
) is a "3-boat valve" type, but the first solenoid valve (110)
It may also be an "on-off" type like (112).

In addition, in the above embodiment, before starting the anti-skid fli control, the hydraulic pressure generation chamber (41J) of the mask cylinder part (3)
From t4υ to pressure liquid all wheel cylinders (45aX46a
), and during the anti-skid control, the pressure lVj was supplied mostly from the pressure chamber u9) of the booster section (4), but even during the anti-skid control, depending on the case, the pressure lVj was supplied from the pressure chamber u9) of the booster section (4). 3) Hydraulic pressure generation chamber (40H4
Pressure liquid may also be supplied from 1). for example,
With the pressure fluid from the pressure chamber t29+ of the booster section (4) (the pressure generation chamber of the mask cylinder section (3) + 401! The hydraulic pressure is low compared to the current pressure fluid), the brake will not be released even after a predetermined time has passed. This is a case where the symbol is not generated from the anti-skid control circuit 1b.

′-! In addition, in the above embodiment, one cylinder body (two
) inside the master ring part (3), booster part (4) and k
I tried to incorporate it into one body, but what about the cylinder body? It is also possible to divide the system into parts and incorporate thick pistons, springs, etc. into each of the master rings and boosters.

As mentioned above, the anti-skid device of the present invention +
According to 'j, pressure fluid is supplied to the d11 solenoid valve between the pressure electric sound of the booster and the first and second solenoid valves'fr: ft
A third controllable electric valve is activated and communicates with the first electromagnetic valve in response to a command from another circuit. Shutoff position, second solenoid valve? Insertion position, th i
Since the M magnetic needle can be switched to the communication position between the pressure chamber and the two electromagnetic valves, the situation where the amount of liquid in the mask ring is insufficient due to the anti-skid control is diffracted, and 1. (7) Does the pressure liquid in the mask cylinder flow back into the pressure chamber during filling operation? It can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a fragmentary view showing a hydraulic pressure booster equipped with an anti-skid device according to an embodiment of the present invention together with an anti-skid piping section, and FIG. Expanding the details of the duplicate valve 1st shore in 1st rule 1sr
It is a front view. In the figure, (IJ.........Hydraulic booster U master cylinder (3)......Mask cylinder section (4)・・・・・・・・・・・・ Boost device part (9)・
・・・・・・・・・・・・・・・ Input 1) 1(
1,'ll... 1st piston (4)... 2nd piston (to)...・・・・・・・・・・・・・・・Pressure chamber 4・・・・・・・・・・・・・・・1st
Drinking pressure generation chamber (4υ・・・・・・・・・・・・・・・・
・Second hydraulic pressure generation chamber (45a bar 46a piece...Wheel cylinder (110X112)...First solenoid valve (111XH3)...Second' turtle valve (117)... Third solenoid valve (130)
・・・・・・・・・Anti-skid piping department agent Yasuo Iisaka

Claims (1)

[Claims] The mask cylinder is connected to the pipe to the wheel cylinder and has a pressure generating chamber all partitioned in the cylinder hole by at least one piston, and the pressure is generated by the operation of the valve device in response to the operation of all pressurized fluid input shafts from an external pressure source. A biasing force is introduced into the chamber and applied to the piston of the mask cylinder? a booster to act, a first solenoid valve disposed between the mask cylinder and the wheel cylinder and switchable between a closing position and a blocking position, and between the first solenoid valve and the wheel cylinder. a second switch which is disposed in the
Solenoid valve and wheel behavior? and an electronic discrimination circuit that monitors and commands the two solenoid valves to completely prevent wheel skidding during braking, and the mask cylinder? A third solenoid valve that can fully control the supply of pressurized fluid to the solenoid valve (2) is installed between the two solenoid valves, which is a two-film actuated mask cylinder in which the effective pressure increase area changes during pressure increase. In response to a charging command from the discrimination circuit, the first solenoid valve is placed in the full cutoff position, the second solenoid valve is placed in the closed position, and the third solenoid valve is placed in the full shutoff position of the pressure chamber and the two Anti-skid device that can be switched to a position where it communicates with the solenoid valves.