JPH10329698A - Liquid pressure brake control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a well-balance weight by dividing a liquid pressure control unit into a pump unit in which a subsidiary pressure source is mounted and a valve unit in which plural open/closed valves are mounted and arranging the pump unit and the valve unit on both sides of a master cylinder. SOLUTION: A housing block for a liquid pressure control unit 40 is divided into two, and a subsidiary pressure source is mounted in one pump unit 41 and plural open/closed valves and an electronic control unit are mounted in the other valve unit 42, the pump unit 41 and the valve unit 42 being arranged on both right and left sides of a master cylinder 30. Although the liquid pressure unit 40 is divided into two in a right and left well-balanced manner, the divided position is determined in consideration of the total weight of functional parts mounted in the units 41, 42, and right and left weights are balanced to be almost equal to each other, so that offset load on the master cylinder 30 can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hydraulic brake control device applicable to a wheel brake pressure control system such as an antilock brake system (ABS) and a traction control system (TCS).

[0002]

2. Description of the Related Art Although a master cylinder and a hydraulic control unit are arranged at different positions in an engine room, a hydraulic brake control in which the master cylinder and the hydraulic control unit are integrally fixed in order to improve the vehicle mountability. If the device is, for example,
No. 2,824,459.

In this apparatus, a hydraulic unit including a pump mechanism, a valve mechanism, and a fluid path is integrally formed with a master cylinder, and a rotary shaft of a pump driving motor is mounted on an upper surface of a housing block so as to be vertically oriented. doing.

[0004] In this device, the weight balance after assembly is poor because the motor is disposed on one side from the center of the master cylinder due to structural factors. Further, in order to cope with the weight imbalance, it is necessary to take measures such as increasing the thickness of the mounting flange on the overload side or increasing the number of mounting bolts on the overload side.

In addition, the hydraulic unit and the housing of the master cylinder are integrally formed, and drive motors are arranged on both sides of the master cylinder in parallel with the master cylinder, and the housing block is fixed to the brake booster and integrated. A modified device is disclosed in JP-A-8-2391.

This apparatus not only increases the manufacturing cost due to the increase in the size of the housing, but also increases the weight and deteriorates transportability and handling. In addition, when the housing is bolted to the brake booster, the installation position of the mounting bolt is limited by space, so that a special brake booster is required and the manufacturing cost of the brake booster increases. Further, since other components are arranged around the mounting bolt, the workability of attaching and detaching the housing is poor.

Further, as a problem common to the above two devices, there is a problem that the flow path design in the housing block is complicated and the workability is poor.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a hydraulic brake control device which is compact in size, has a good weight balance, and is excellent in vehicle mountability. It is in. Still another object of the present invention is to provide a hydraulic brake control device which is excellent in workability and workability for attachment and detachment.

[0009]

The invention according to claim 1 is
A hydraulic control unit that integrates a master cylinder and a hydraulic control unit to form two hydraulic circuits between the master cylinder and a wheel cylinder, wherein the hydraulic control unit is provided with an auxiliary pressure source. Unit and
A hydraulic brake control device characterized in that the pump unit and the valve unit are divided into two parts, a valve unit equipped with a plurality of on-off valves, and the pump unit and the valve unit are arranged on both sides of a master cylinder. The invention according to claim 2 is the hydraulic brake control device according to claim 1, wherein an electronic control unit is integrated with a valve unit equipped with a plurality of on-off valves. It is. According to a third aspect of the present invention, there is provided the hydraulic brake control device according to the first aspect, wherein an auxiliary reservoir of the hydraulic pressure control unit is formed integrally with the housing of the master cylinder. is there. According to a fourth aspect of the present invention, in the hydraulic brake control device according to the first aspect, the pump unit and the valve unit are respectively arranged at positions separated from the mounting flange of the master cylinder. It is a control device. According to a fifth aspect of the present invention, in the hydraulic brake control device according to any one of the first to fourth aspects, an auxiliary pressure of a system corresponding to each liquid chamber is provided beside each liquid chamber in the tandem type master cylinder. A hydraulic brake control device, characterized in that a hydraulic pump and a plurality of on-off valves constituting a source are respectively located, and flow paths are formed in a housing of a pump unit, a valve unit and a master cylinder. According to a sixth aspect of the present invention, in the hydraulic brake control device according to any one of the first to fifth aspects, the pump unit and the valve unit are respectively disposed on both sides of the master cylinder so that the right and left weights are substantially equal. A hydraulic brake control device, characterized in that

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

<A> Outline of Apparatus FIG. 1 is a front view of a hydraulic brake control apparatus 10, FIG. 2 is an assembly view thereof, FIG. 3 is a plan view thereof, and FIG. 4 is a model view thereof.

Referring to FIG. 2, a hydraulic brake control device 10
Is a brake booster 20, a master cylinder 30 fixed to the brake booster 20, and a master cylinder 30.
Hydraulic pressure control unit 4 divided into two parts on both sides
0 is integrally provided.

On the upper surface of the master cylinder 30, there are provided connection ports 31 communicating with the internal liquid chamber.
1, 31 and the reservoir 33 are connected via a hose or directly.

<B> Brake booster As shown in FIG. 2, the brake booster 20 is fixed to a stationary member such as a dashboard (not shown), is connected to a brake pedal 22 via an input shaft 21, and It is configured such that the pedaling force transmitted to 21 can be boosted and transmitted to master cylinder 30.

<C> Master Cylinder FIG. 4 is a sectional view showing a model of a hydraulic brake control device. Piston 3 is provided in bore hole 32 of master cylinder 30.
4, 35 and springs 34a, 35a are accommodated, and a first and a second
Liquid chambers A and B are formed.

A mounting flange 37 is attached to the end of the housing 36.
Is formed, and the bolt / nut 2 is attached to the brake booster 20.
3 is screwed. The boost is transmitted to the pistons 34 and 35 of the master cylinder 30 via the output shaft of the brake booster 20.

Further, as shown in FIG.
A bore hole 38 is provided on the bottom surface side of the base member, and an auxiliary reservoir 39 is integrally formed using the bore hole 38.

<D> Hydraulic pressure control unit As shown in FIGS. 1 and 4, the hydraulic pressure control unit 40 includes a plurality of sets of solenoid valves 43 for opening and closing the flow path, and hydraulic pumps 44 and 44 constituting auxiliary pressure sources. , A drive motor 45, and an electronic control unit for controlling the operation of these components.

According to the present invention, the housing block of the hydraulic control unit 40 is divided into two parts, one pump unit 41 is provided with an auxiliary pressure source, and the other valve unit 42 is provided with a plurality of on-off valves and an electronic control unit. A pump unit 41 and a valve unit 42 are provided on both left and right sides of the master cylinder 30.
Are arranged respectively.

In the pump unit 41, two hydraulic pumps 44, 44 are arranged in parallel, and a drive motor 45 is mounted on a side surface of the pump unit 41 in a direction perpendicular to the master cylinder 30. .

A plurality of solenoid valves 4 are provided on the side of the valve unit 42.
3 are provided.

A bowl-shaped cover 51 having a control board 50 therein is attached to a side surface of the valve unit 42 so as to cover these solenoid valves 43. An electronic component 52 such as an ECU chip is provided on the control board 50. The control board 50 and the cover 51 constitute an electronic control unit 53. The drive motor 45 is electrically connected to the control board 50, each of the solenoid valves 43, and the housing of the master cylinder 30 by through connection or external connection.
A connector is formed on a part of the cover 51, and an external harness can be connected to the connector.

The number of the solenoid valves 43 and the flow paths to be described later are of a nature selected according to the type of hydraulic control system.

A plurality of ports 48 are formed on the side surface around the valve unit 42, and are connected to the wheel cylinders of each wheel via piping. In this example, port 48 is connected to valve unit 4
2 is formed on the upper surface, but may be provided on the lower surface, or may be dispersed on a plurality of surfaces, and the formation position is not particularly limited.

The two units 41 and 42 are integrally attached to the left and right side surfaces of the master cylinder 30 with a bolt 47 via a seal member 46. The sealing member 4
Reference numeral 6 includes, in addition to the gasket having the outer shape of the units 41 and 42, an O-ring provided for each of the opposed flow paths.

Each unit 41, 42 and master cylinder 3
Since there is only one seal surface between 0, it is easy to ensure high sealing performance.

As described above, the hydraulic control unit 40 is divided into two parts to improve the balance between the left and right sides. The division position is determined in consideration of the total weight of the functional components provided in each of the units 41 and 42. , Make the left and right weight balance almost equal,
It is also possible to avoid the bias load acting on the master cylinder 30. The positions of the pump unit 41 and the valve unit 42 with respect to the master cylinder 30 may be on either the left or right side of the master cylinder 30, and are determined according to the vehicle environment.

Inside the pump unit 41 and the valve unit 42 and the inside of the housing 36 of the master cylinder 30, there are two connecting parts between the master cylinder 30 and the wheels.
A system hydraulic circuit is formed. Known circuits can be applied to the two hydraulic circuits, and a description thereof will be omitted.

When the pump unit 41 and the valve unit 42 are mounted at positions away from the mounting flange 37 of the master cylinder 30, a working space can be secured between the units 41 and 42 and the mounting flange 37.
0 can be easily attached and detached.

[0030]

[Action]

<B> During normal braking When the brake pedal 22 is depressed, the brake booster 2
0, the pedaling force is boosted, and this force is applied to the master cylinder 3
0 is transmitted. Each of the first and second in the master cylinder 30
The pressure generated in the liquid chambers A and B passes through a flow path in the valve unit 42 and passes through a port 48 formed on the peripheral surface of the valve unit 42.
Leads to. Pressurized liquid is sent from each port 48 to the wheel cylinder of each wheel via a pipe to perform braking.

<B> During skid control A signal for detecting the tendency of the wheels to lock is input to the electronic control unit. When the electronic control unit determines that the skid control of the brake fluid pressure is necessary, each of the solenoid valves 43 and the drive motor 45 is operated to perform a predetermined skid control (pressure reduction mode,
(Holding mode, pressure increasing mode) to properly control the braking force of each wheel.

[0032]

Modification In the first embodiment of the present invention, the case where the auxiliary reservoir 39 is formed integrally with the bottom surface of the master cylinder 30 has been described, but a separate auxiliary reservoir 39 may be attached to the bottom surface of the master cylinder 30. Alternatively, it may be provided in the pump unit 41.

In the first embodiment of the present invention, the case where the electronic control unit is integrally mounted on the valve unit 42 (integral type) has been described, but this may be separated (separate type). . In this case, the cover 51 mainly functions as a protective cover for the electromagnetic valve 43.

[0034]

Second Embodiment FIG. 5 shows two hydraulic circuits I,
In II, the functional elements of the hydraulic circuits I and II (the hydraulic pump 44 and the inlet valve 43a and the outlet valve 43b) of each system are divided into the first hydraulic chamber A and the second hydraulic chamber A of the master cylinder 30 corresponding to each system. Another embodiment arranged on the side of the room B is shown.

By arranging the functional elements of each system beside the liquid chambers A and B of the corresponding system, not only the overall length of the flow path becomes shorter, but also all the flow paths with respect to the master cylinder 30. It can be formed in a parallel or orthogonal direction, and the work process for drilling the flow path can be simplified. Therefore, the manufacturing cost of the device can be significantly reduced.

[0036]

As described above, the present invention has the following effects. <A> Since no unbalanced load acts on the master cylinder, it is not necessary to take measures such as increasing the thickness of the mounting flange on the overload side or increasing the number of mounting bolts on the overload side. <B> Since a working space can be secured between the brake booster and the mounting flange of the master cylinder, the workability of attaching and detaching the master cylinder is good. For example, it is effective when replacing a seal member or the like inside the master cylinder after being mounted on a vehicle. <C> Since the auxiliary reservoir is formed integrally with the master cylinder, the hydraulic brake control device can be made compact. <D> By arranging the functional elements of the hydraulic circuits I and II (hydraulic pumps and inlet valves, outlet valves, etc.) for each system on the side of the liquid chamber corresponding to each system of the tandem master cylinder ,
The entire length of the flow path can be shortened, the operation of forming the flow path is simplified, and the cost of the apparatus can be reduced. <E> Since the hydraulic unit is divided into two parts so that the left and right weights acting on the master cylinder are substantially balanced, a hydraulic brake control device with extremely high weight balance, compactness, and excellent vehicle mountability has been developed. can get.

[Brief description of the drawings]

FIG. 1 is a front view of a hydraulic brake control device according to a first embodiment of the present invention.

FIG. 2 is an assembly drawing of a hydraulic brake control device.

FIG. 3 is a plan view of a hydraulic brake control device.

FIG. 4 is a model diagram of a hydraulic brake control device.

FIG. 5 is a model diagram of a hydraulic brake control device according to a second embodiment of the invention;

[Explanation of symbols]

 A first fluid chamber B second fluid chamber 10 hydraulic brake control device 20 brake booster 21 input shaft 22 brake pedal 30 master cylinder 33 reservoir 34, 35 piston 34a, 35a spring 36 housing 37 mounting flange 38 bore hole 39 auxiliary Reservoir 40 Hydraulic pressure control unit 41 Pump unit 42 Valve unit 43 Solenoid valve 44, 44 Hydraulic pump 45 Drive motor 46 Sealing material 47 Bolt 50 Control board 51 Cover 53 Electronic control unit

Claims (6)

[Claims] 1. A hydraulic control unit which integrates a master cylinder and a hydraulic control unit to form two hydraulic circuits between the master cylinder and a wheel cylinder of a wheel. A hydraulic brake control device, characterized in that the pump unit and the valve unit are divided into two parts, a pump unit equipped with a source and a valve unit equipped with a plurality of on-off valves, and the pump unit and the valve unit are arranged on both sides of a master cylinder. 2. The hydraulic brake control device according to claim 1, wherein an electronic control unit is integrated with a valve unit equipped with a plurality of on-off valves. 3. The hydraulic brake control device according to claim 1, wherein an auxiliary reservoir of the hydraulic control unit is formed integrally with the housing of the master cylinder. 4. The hydraulic brake control device according to claim 1, wherein the pump unit and the valve unit are respectively arranged at positions separated from the mounting flange of the master cylinder. 5. The hydraulic brake control device according to claim 1, wherein an auxiliary pressure source of a system corresponding to each liquid chamber is provided beside each liquid chamber in the tandem type master cylinder. A hydraulic pump and a plurality of on-off valves are respectively positioned, and a flow path is formed in the pump unit, the valve unit and the housing of the master cylinder,
Hydraulic brake control device. 6. The hydraulic brake control device according to claim 1, wherein the pump unit and the valve unit are arranged on both sides of the master cylinder so that the right and left weights are substantially equal. Characteristic, hydraulic brake control device.