JP3482692B2 - Automotive brake fluid pressure control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake master cylinder and an ABS actuator (a known actuator whose operation is controlled by an antilock control computer to control locking of wheels during braking) or ABS &.
TRC actuator (a known actuator whose operation is controlled by an anti-lock & traction control computer to control the locking of wheels during braking and the slip of driving wheels during driving)
The present invention relates to a vehicle braking fluid pressure control device.

[0002]

2. Description of the Related Art Recently, ABS has been installed in a brake master cylinder.
A braking fluid pressure control device for an automobile, which is integrally provided with an actuator or an ABS & TRC actuator, has been developed. The conventionally proposed device has an ABS actuator or an A actuator on the cylinder body of the brake master cylinder.
The actuator assembly of the BS & TRC actuator is mounted directly or via a bracket and a rubber mount, or each component of the actuator is separately mounted on the cylinder body of the brake master cylinder.

[0003]

In the conventional device in which the actuator assembly is mounted on the cylinder body of the brake master cylinder, the body of the actuator assembly is formed separately from the cylinder body. Not only is it difficult to reduce the size and weight of the device, but it is necessary to interpose a seal member between each body, which makes the assembly difficult.
In addition, since the center of gravity of the device is deviated due to the weight of the actuator assembly, it is necessary to employ a large and strong support structure for supporting the device.

On the other hand, in the conventional apparatus in which the constituent elements of the actuator are separately assembled in the cylinder body of the brake master cylinder, it is possible to suppress the deviation of the center of gravity. Since the body of the constituent elements is configured separately from the cylinder body, it is difficult to reduce the size and weight of the device, and it is necessary to interpose a seal member between the bodies, resulting in poor assembly. In addition, since each component of the actuator is connected by piping, the number of parts is large and the assemblability is poor. The present invention has been made to address the above-described problems, and an object thereof is to reduce the size and weight of the device and improve the assembling property.

[0005]

In order to achieve the above object, in the present invention, a pump body of an ABS actuator or an ABS & TRC actuator and a solenoid valve body are integrally formed around a cylinder bore of a cylinder body of a brake master cylinder. Then, a hydraulic passage connecting the brake master cylinder and the ABS actuator or the pump of the ABS & TRC actuator and the solenoid valve is formed in the body combination. Further, the pump body is arranged on one side of the cylinder body, the solenoid valve body is arranged on the other side of the cylinder body, and the drive motor of the pump and the drive solenoid of the solenoid valve are arranged to face each other. It was

[0006]

According to the present invention, the AB is provided around the cylinder bore of the cylinder body of the brake master cylinder.
Since the pump body and the solenoid valve body of the S actuator or ABS & TRC actuator are integrally formed, and the fluid passage for connecting the brake master cylinder and the pump of the ABS actuator or ABS & TRC actuator and the solenoid valve is formed in the body combination, each body is formed. Can be shared with each other, and the space around the cylinder bore of the brake master cylinder can be effectively used to reduce the size and weight of the device.
The pump and solenoid valve of the BS actuator or ABS & TRC actuator can be connected without using piping, and it is not necessary to interpose a seal member between each body, so that the assemblability of the device can be improved, and by this, Also, the size and weight of the device can be reduced.

In addition to the above structure, the pump body is arranged on one side of the cylinder body, and the solenoid valve body is arranged on the other side of the cylinder body, so that When the drive solenoids of the solenoid valve are arranged to face each other, in addition to the above-described effects, the weight balance of the device can be achieved and an increase in the size of the support structure can be suppressed. Can be prevented from increasing in size.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a braking hydraulic pressure control device for an automobile according to the present invention, in which a brake mounted and supported on a known vacuum brake booster 10 mounted on a dash panel (not shown). The master cylinder 20 includes pumps 30a and 30b, which are constituent elements of the ABS actuator, and a solenoid valve 40.
a, 40b and 50a to 50d and actuator reservoirs 60a and 60b are integrally assembled to form the braking hydraulic circuit shown in FIG.
a single cover 70 on the outside of a, 40b and 50a-50d
Is covered by. The braking hydraulic circuit of FIG. 9 connects the wheel cylinder FL of the left front wheel brake and the wheel cylinder RR of the right rear wheel brake to one of the two pressure chambers of the brake master cylinder 20, and also the wheel of the right front wheel brake. A braking hydraulic circuit for an FF vehicle (front engine / front drive vehicle) in which a cylinder FR and a wheel cylinder RL of a left rear wheel brake are connected to the other of the two pressure chambers.

As shown in FIG. 3, the brake master cylinder 20 includes a cylinder body 21, pistons 22, 23 and return springs 24, 25 coaxially assembled with a cylinder bore 21a of the cylinder body 21,
The master cylinder reservoir 26 is liquid-tightly assembled to the upper part of the cylinder body 21, and the cylinder body 21 and the two pistons 22 and 23 form two pressure chambers 27 and 28. In addition, each pressure chamber 27,
28 is the cylinder body 2 as shown in FIGS. 6 and 9.
The fluid pressure passages 101 and 102 provided in the No. 1 are communicated with each other.

The pumps 30a and 30b are shown in FIGS.
As shown in FIGS. 5 and 9, the pump body 31 integrally formed on one upper side of the cylinder body 21 around the cylinder bore 21a and the pump bore 31a provided in the pump body 31 are coaxially assembled. Each piston 32a,
32b and return springs 33a and 33b, and the piston 32 that is rotatably assembled to the pump body 31.
a, 32b of the respective return springs 33a, 33b and cooperation
Work to reciprocate is allowed to pump chambers 34a, the cam shaft 35 to increase or decrease the 34b, pump chambers 34a, 34b and each actuator reservoirs 60a, 60b of蓄液chamber (indicated one as an example in FIG. 5) 64 Each hydraulic passage 10 for connecting
Intake check valve 36b (one of which is shown in FIG. 5 as an example) 36b interposed in 3, 104 to allow inflow into each pump chamber
And the discharge side hydraulic passage 10 of each pump chamber 34a, 34b
Discharge check valves 37a and 37b, which are interposed in the pump chambers 5 and 106 and allow outflow from the pump chambers, and the pump body 3.
1 is attached to one side of the cam shaft 35 with a bolt 38
Is constituted by an electric motor 39 that is rotationally driven by a rotating shaft 39a. The pump bore 3 shown in FIG.
Both ends of 1a are liquid-tightly closed by plugs 201 and 202. In addition, each hydraulic passage 10 shown in FIG.
The ends of 4, 106 are liquid-tightly closed by the plugs 203, 204.

Each solenoid valve 40a, 40b is a 3-port 2-position switching valve as shown in FIG.
On the other hand, as shown as an example of the one side 40b, a solenoid valve body 41 integrally formed on the lower portion of the other side of the cylinder body 21 around the cylinder bore 21a and a stepped bore 41a provided on the solenoid valve body 41 are coaxially arranged. The assembled return spring 42, poppet 43, valve seat 44, ball valve 45, movable core needle (consisting of a needle and a movable core integrally provided at the right end of the figure in the figure) 46, fixed core 47 and return spring 4.
8 and an electromagnetic solenoid 49 assembled to a sleeve 47a fixed to the solenoid valve body 41 by using a stop ring 47c.

The valve seat 44 is liquid-tightly fixed in the stepped bore 41a by caulking a part 41b of the solenoid valve body 41 on the outer circumference on the right side in the drawing.
As shown in FIG. 7, a valve hole 44a that communicates with the hydraulic pressure passage 102 that communicates with the pressure chamber 28 of the brake master cylinder 20 through the hydraulic pressure passages 107 and 108, and a hydraulic pressure that communicates with the valve hole 44a. The solenoid valve 5 passes through the passages 109 and 110 and the hydraulic passage 111 shown in FIG.
0d, a communication hole 44b, which is provided coaxially with the valve hole 44a and communicates with the communication hole 44b, and a part of the stepped bore 41a, the hydraulic passage 112, and the hydraulic passage 113 shown in FIG. Has a valve hole 44c communicating with the liquid storage chamber 64 of the actuator reservoir 60b through the valve hole 44a.
And either of 44c is closed by the ball valve 45 (the valve hole 44c is closed in the state of FIG. 7).
It is like this. The ends of the hydraulic pressure passages 102, 108, 109 shown in FIG.
Liquid-tightly closed by 206 and 207, and the end of the hydraulic passage 114 shown in FIG. 6 is liquid-tightly closed by a plug 208. The hydraulic passage 114 is the hydraulic passage 1.
The hydraulic pressure passage 102, which communicates with the pressure chamber 28 of the brake master cylinder 20 through a part of 08,
The hydraulic passages 115, 116, 11 shown in FIGS. 6 and 8
Port P connected to the wheel cylinder RL of the left rear wheel brake through a pipe (not shown) through 7,118.
4, a check valve V4 for promptly returning the brake fluid from the wheel cylinder RL of the left rear wheel brake to the pressure chamber 28 of the brake master cylinder 20 is provided in the fluid pressure passage 116 when the brake is released. There is. Filters F1 and F2 are provided in the fluid pressure passages 102 and 118 for removing foreign matters.

As shown in FIGS. 6 and 7, the poppet 43 has a communicating groove 43a and is assembled in the stepped bore 41a so as to be movable in the axial direction. Is urged towards 45,
The ball valve 45 is always engaged at the tip of the protrusion. The movable core needle 46 is assembled to face the poppet 43 so as to be movable in the axial direction, and
8 is urged in the direction to separate from the ball valve 45, and is driven toward the ball valve 45 against the return spring 48 by the driving force generated by the energization of the electromagnetic solenoid 49 to move the ball valve 45 and the poppet 43. It pushes against the return spring 42. Therefore, when the electromagnetic solenoid 49 is not energized, the ball valve 45 opens the valve hole 44a and closes the valve hole 44c, and when the electromagnetic solenoid 49 is energized, the ball valve 45 closes the valve hole 44a and opens the valve hole 44c. It is like this. The fixed core 47 is
It is liquid-tightly fixed to the stepped bore 41a by using a retaining ring 47b together with the sleeve 47a.

Each solenoid valve 50a-50d is a 2-port 2-position switching valve as shown in FIG.
As shown in FIG. 1 as an example, the solenoid valve body 51 integrally formed on the lower portion of the other side of the cylinder body 21 around the cylinder bore 21a and the stepped bore 51a provided on the solenoid valve body 51 are coaxial with each other. The valve seat 52, the movable core needle (consisting of the needle and the movable core integrally provided at the right end portion in the figure) 53, the fixed core 54, and the return spring 55.
And an electromagnetic solenoid 56 assembled using a stop ring 54c to a sleeve 54a fixed to the solenoid valve body 51.

The valve seat 52 is liquid-tightly fixed in the stepped bore 51a by caulking a part 51b of the solenoid valve body 51 on the outer periphery on the right side in the drawing.
And, as shown in FIG. 8, the hydraulic pressure passages 111, 110,
109 through the through hole 44b of the solenoid valve 40b and a part of the stepped bore 51a and the hydraulic passage 11
It has a valve hole 52a communicating with the port P4 through 7, 118, and the valve hole 52a is opened and closed by the tip valve portion 53a of the movable core needle 53. The ends of the hydraulic pressure passages 116 and 117 shown in FIG. 8 are liquid-tightly closed by the plugs 209 and 210. Further, the hydraulic pressure passage 118 is provided coaxially with the port P4 and has a check valve V8 with an orifice at the inner end thereof.
As shown in FIGS. 5 and 8, is connected to the hydraulic pressure passage 106 in which the discharge check valve 37b of the pump 30b is interposed through the hydraulic pressure passage 119, and the hydraulic fluid discharged from the pump 30b is discharged. Is a port P through a fluid pressure passage 119 and a fluid pressure passage 118 having a check valve V8 with an orifice.
4 are supplied.

The movable core needle 53 is assembled so as to be movable in the axial direction, and is biased by a return spring 55 in a direction in which it is separated from the valve seat 52.
The driving force generated by energizing the electromagnetic solenoid 56 is moved toward the valve seat 52 against the return spring 55. Therefore, when the electromagnetic solenoid 56 is not energized, the valve portion 53a of the movable core needle 53 opens the valve hole 52a, and the electromagnetic solenoid 5
The valve portion 53a closes the valve hole 52a when power is supplied to the valve 6. The fixed core 54 is liquid-tightly fixed to the stepped bore 51a by using a retaining ring 54b together with the sleeve 54a.

Each actuator reservoir 60a, 60b
5 shows an actuator reservoir body 61 integrally formed at a lower portion on one side around the cylinder bore 21a of the cylinder body 21, as shown by way of example on the other hand in FIG.
A piston 62 that is liquid-tightly and axially movable in a cylinder bore 61a provided in the actuator reservoir body 61 to form a liquid storage chamber 64, and a spring that biases the piston 62 toward the pressure storage chamber 64. The brake fluid returned from the solenoid valve 40b through the hydraulic pressure passages 112 and 113 is supplied to the pump 30b through the hydraulic pressure passage 104. The end of the spring 63 (not shown) is engaged with a plug (not shown) assembled to the actuator reservoir body 61.

It should be noted that the ABS not shown in FIGS.
Actuator components, namely solenoid valves 40a and 50a-50c and actuator reservoir 6
0a, check valves V1 to V3, and check valves V5 to V7 with orifices are substantially the same as the solenoid valves 40b and 50d, the actuator reservoir 60b, the check valve V4, and the check valve with orifice V8 shown in FIGS. And each hydraulic passage (as in the hydraulic passages shown in FIGS. 4 to 8 is provided around the cylinder bore 21a of the brake master cylinder 20) as shown in FIG. Are connected to each other.

In the present embodiment constructed as described above, the cylinder body 21 of the brake master cylinder 20 is
The pump body 31, the solenoid valve bodies 41, 51, and the actuator reservoir body 61 of the ABS actuator are integrally formed around the cylinder bore 21a of
The brake master cylinder 20 and the A
Since the hydraulic passages (101 to 119 etc.) connecting the pumps 30a and 30b of the BS actuators, the solenoid valves 40a and 40b and 50a to 50d, and the actuator reservoirs 60a and 60b are formed, a part of each body can be shared with each other. Brake master cylinder 2
0, the space around the cylinder bore 21a can be effectively used, and the size and weight of the device can be reduced. Further, the brake master cylinder 20, the ABS actuator pumps 30a and 30b, and the solenoid valve 40 can be used.
a, 40b and 50a to 50d can be connected to the actuator reservoirs 60a and 60b without using piping, and it is not necessary to interpose a seal member between each body, and the assembling property of the device can be improved. ,
This also makes it possible to reduce the size and weight of the device.

Further, in this embodiment, as shown in FIG. 1, the pump body 31 and the actuator reservoir body 61 are arranged on one side of the cylinder body 21, and the solenoid valve bodies 41 and 51 are arranged on the cylinder body 21. The motors 39 for driving the pumps 30a, 30b and the solenoid valves 40a, 40b are arranged on the other side.
And electromagnetic solenoids for driving 50a to 50d (49, 5
6 and the like) are arranged to face each other, the weight balance of the device can be achieved, and an increase in the size of the support structure, for example, an increase in the shell thickness of the vacuum brake booster 10 can be suppressed. Upsizing can be suppressed.

FIG. 10 and FIG. 11 show an example in which the present invention is applied to a braking hydraulic pressure control device for an automobile in which an ABS & TRC actuator is integrally provided in a brake master cylinder, and this embodiment is an FR vehicle (front engine Rear drive vehicle), and AB in the above embodiment
Pumps 30a, 3 which are the respective constituent elements of the S actuator
0b, solenoid valves 40a, 40b and 50a-50
In addition to d and the actuator reservoirs 60a and 60b, a solenoid valve 80 and a check valve V9 are integrally assembled to the brake master cylinder 20. Also,
In this embodiment, the solenoid valve 50a is connected to the wheel cylinder RL of the left rear wheel brake, the solenoid valve 50b is connected to the wheel cylinder RR of the right rear wheel brake, and the solenoid valve 50c is connected to the wheel cylinder FL of the left front wheel brake. The solenoid valve 50d is connected to the wheel cylinder FR of the front right wheel brake. Since other configurations are substantially the same as those of the above-described embodiment, the same reference numerals are given and the description thereof is omitted.

The solenoid valve 80 shown in FIG.
Since it has substantially the same configuration as the solenoid valve 40b shown in FIG. 6, its detailed description is omitted. As shown in FIGS. 10 and 11, the first port 81b is provided in each of the hydraulic passages 2 provided around the cylinder bore 21a of the cylinder body 21.
01, 202, 101 and the fluid pressure passages 201, 20 that communicate with the pressure chamber 27 of the brake master cylinder 20 via the filter F3 and that are provided around the cylinder bore 21a.
2, 203, 204 and the check valve V9 to communicate with the reservoir communication port 21b of the brake master cylinder 20 (which communicates with the reservoir 26), and the second port 81c.
Is communicated with the first port of the solenoid valve 40a, that is, the hydraulic pressure passage 206 corresponding to the hydraulic pressure passage 107 of FIG. 6 through the hydraulic pressure passage 205 provided around the cylinder bore 21a as shown in FIG. The port 81d communicates with the pump 30a via the liquid storage chamber of the actuator reservoir 60a as shown in FIG.

With the above-described structure, the reservoir 26 of the brake master cylinder 20 and the pump 30a can be connected by the hydraulic passage provided in the cylinder body 21, so that the reservoir 26 of the brake master cylinder 20 and the ABS & TRC are connected as in the conventional case. It is not necessary to connect the pump body of the actuator with hoses.

In each of the above-described embodiments, the actuator including at least the pumps 30a and 30b, the solenoid valves 40a and 40b and 50a to 50d, the actuator reservoirs 60a and 60b, and the like as constituent elements of the actuator is integrally assembled to the brake master cylinder. Although the present invention has been embodied in the configuration, the invention may be embodied in the same manner or with appropriate modifications in a configuration in which an actuator of another type whose constituent elements are different from those of the above-described embodiment is integrally assembled to the brake master cylinder. However, the present invention is not limited to the above embodiments. Further, the hydraulic pressure control operation of each of the above-mentioned embodiments is publicly known, and since it is not related to the gist of the present invention, its explanation is omitted.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a vehicle braking hydraulic pressure control device (device in which an ABS actuator is assembled to a brake master cylinder) according to the present invention.

FIG. 2 is a side view of the vehicle braking hydraulic pressure control device shown in FIG.

FIG. 3 is a vertical cross-sectional side view of the center of a main part of the vehicle brake hydraulic pressure control device shown in FIGS. 1 and 2.

4 is a partial cross-sectional plan view taken along line 4-4 of FIG.

5 is a partial vertical sectional front view taken along the line 5-5 of FIG.

6 is a partial vertical sectional front view taken along the line 6-6 in FIG.

7 is an enlarged cross-sectional view of a main part of FIG.

FIG. 8 is a partial vertical sectional front view taken along the line 8-8 of FIG.

FIG. 9 is a braking hydraulic pressure circuit diagram including the vehicle braking hydraulic pressure control device shown in FIGS. 1 and 2.

FIG. 10 is a braking fluid pressure circuit diagram including another vehicle braking fluid pressure control apparatus (an apparatus in which an ABS & TRC actuator is assembled to a brake master cylinder) according to the present invention.

11 is a vertical cross-sectional front view of essential parts of the vehicle braking hydraulic pressure control device shown in FIG.

[Explanation of symbols]

20 ... Brake master cylinder, 21 ... Cylinder body, 21a ... Cylinder bore, 30a, 30b ... Pump,
31 ... Pump body, 39 ... Electric motor, 40a, 4
0b, 50a to 50d ... Solenoid valve, 41, 51
... Solenoid valve body, 49, 56 ... Drive solenoids 101-119, 201-206 ... Hydraulic passages.

Front Page Continuation (72) Inventor Kei Toda 2-1-1 Asahi-cho, Kariya City, Aichi Aisin Seiki Co., Ltd. (56) Reference JP-A-2-175373 (JP, A) JP-A-61-12460 ( JP, A) Special table 1-501926 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60T 8/32-8/96

Claims (2)

(57) [Claims] 1. An ABS actuator or A around a cylinder bore of a cylinder body of a brake master cylinder.
The BS & TRC pump body and a solenoid valve body having a built-in actuator formed integrally, form this integrally
Shin Linda body, pump body and solenoi made
A braking fluid pressure control device for an automobile, wherein a fluid pressure passage for connecting a pump of the ABS actuator or the ABS & TRC actuator and a solenoid valve to the brake master cylinder is formed inside the valve body . 2. A placed the pump body on one side of the cylinder body, the other side of the cylinder body solenoids
The drive valve of the pump and the drive solenoid of the solenoid valve are connected to the cylinder by disposing an id valve body.
The braking fluid pressure control device for an automobile according to claim 1, wherein the braking fluid pressure control device is located on both sides of the dobody so as to face each other .