JPH0663461U - Hydraulic control device for anti-lock brake - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a hydraulic control device for an anti-lock brake, which is compactly incorporated in an actuator housing integrally with a solenoid valve and which can suppress pulsation and contribute to sound vibration reduction with a small number of parts. [Structure] A liquid passage (17A, 4) on the master cylinder side to the solenoid valve 1 of the actuator housing 3 is kept liquid-tight and slidable on the actuator housing (3), and is connected to the master cylinder side and the wheel cylinder side. When the difference in hydraulic pressure exceeds a predetermined value, the throttle portion (orifice forming member 3
0), a hydraulic control valve (sound vibration reduction valve 2) that closes the valve so that it can be communicated only with the solenoid valve (1) is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hydraulic control device for an anti-lock brake, and more specifically, it is provided in an anti-lock brake device that prevents wheels from being locked during brake control of a vehicle and is involved in hydraulic control during the control operation. The present invention relates to a hydraulic control device.

[0002]

[Prior art]

 In this type of anti-lock brake device (hereinafter referred to as ABS), noise caused by pulsation of a pump provided in the control actuator and shutter noise caused by turning on and off an electromagnetic control valve (hereinafter simply referred to as electromagnetic valve) In order to prevent a sudden change in hydraulic pressure, an orifice or damper chamber is installed in the reflux fluid passage where the pump is installed, while the master cylinder (hereinafter referred to as M / C) and the inlet solenoid valve are connected. A hydraulic pressure control valve that controls the hydraulic passage to the W / C side when the hydraulic pressure on the M / C side or the hydraulic pressure on the wheel cylinder (hereinafter referred to as W / C) side becomes higher than a predetermined value. (The following is a sound vibration reduction valve).

[0003]

[Problems to be solved by the device]

 However, as described above, if each mechanism of the ABS control system is independently provided with a mechanism for reducing sound vibration, the number of valves and the number of parts are increased, and these are individually assembled in the actuator housing. In that case, the liquid path becomes complicated, and the housing itself becomes large, which is disadvantageous for mounting on a vehicle. Also, the cost of the ABS itself increases as the number of parts increases.

The object of the present invention is to pay attention to such a conventional problem, and in order to solve the problem, it is compactly incorporated into an actuator housing together with a solenoid valve, and pulsation is suppressed with a small number of parts and sound is reduced. It is to provide a hydraulic control device for anti-lock brakes that can contribute to vibration reduction.

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention has a solenoid valve arranged in a liquid passage from the master cylinder side of an actuator housing to the wheel cylinder side, and the solenoid valve is controlled by the control operation of the electromagnetic valve to be connected to the master cylinder side. In the anti-lock brake hydraulic pressure control device that is controlled so that it can communicate with the wheel cylinder side from the master cylinder side when the difference in hydraulic pressure from the wheel cylinder side exceeds a predetermined value, the solenoid valve of the actuator housing is connected to the solenoid valve. The master cylinder side fluid passage is kept liquid-tight and slidable in the actuator housing, and closes so that it can communicate with the wheel cylinder side only through the throttle when the hydraulic pressure difference exceeds a specified value. A hydraulic pressure control valve for performing a valve operation is provided integrally with the solenoid valve.

[0006]

[Action]

 According to the present invention, when the hydraulic pressure difference between the master cylinder side and the wheel cylinder side exceeds a predetermined value due to the control operation of the solenoid valve, the master cylinder side fluid passage and the wheel cylinder side are closed due to the closing operation of the fluid pressure control valve. Since the valve is kept closed with the fluid passage and the master cylinder side fluid passage and the wheel cylinder side fluid passage are communicated only through the throttle portion, for example, a slow pressure increase is performed through the throttle portion. As a result, the pulsation generated in the solenoid valve can be suppressed and the generation of sound vibration can be reduced, and the hydraulic control valve can be integrated in a compact form with the solenoid valve and incorporated in the actuator housing.

[0007]

【Example】

 Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the present invention, as shown in this figure, the normally open solenoid valve 1 and the sound vibration reduction valve 2 involved in hydraulic control are integrated into the actuator housing 3, where 4 is A fluid passage 5 connected to an M / C port (not shown) of the actuator housing 3 is a fluid passage connected to a W / C port (not shown). Further, 6 is an outer cylinder of the inlet solenoid valve 1, 7 is an inner cylinder, 8 is a plunger formed integrally with a movable element 9, and is slidable along the inner cylinder 7, 10 is a tip portion of the plunger 8. Is a hemispherical valve body portion, 11 is a spring that biases the plunger 8 upward so as to keep the valve body portion 10 open from the valve seat 12, and 13 is a bore in the inner cylinder 7. The liquid passage 13 is provided, and the liquid passage 13 communicates with the liquid passage 5 on the W / C side through the filter 14. A solenoid 15 drives the solenoid valve 1.

In the inlet solenoid valve 1 having the above-described structure, the outer cylinder 6 is press-fitted into the valve holding hole 3 A of the actuator housing 3, and the seal member is provided between the inner cylinder 7 and the housing 3. It is kept liquid-tight by 16. On the other hand, a cylindrical portion 17 extends downwardly from the valve sheet 12 in the inner cylinder 7, and the valve seat 12 is press-fitted and fixed to the inner liquid passage 17A having a cylindrical shape, and the outer peripheral surface 17B thereof. Sound and vibration reduction The valve member 2A of the valve 2 is slidably fitted.

Reference numeral 18 is a seal member that keeps the space between the outer peripheral surface 17B of the cylindrical portion and the valve member 2A liquid-tight, and 19 is a cup seal that keeps the valve member 2A in the cylinder portion 3B of the actuator housing 3 in a liquid-tight and sliding manner. , 20 is a filter, and 21 is a spring that biases the valve member 2A toward the bottom surface 3C of the cylinder portion 3B. This spring 21 provides the liquid passage 17A and the M / C side liquid passage 4 in the valve member 2A. The communication is maintained through the communication passage 2B. Reference numeral 30 is an orifice forming member mounted at a position facing the lower end of the cylindrical portion 17 of the valve member 2A. When the liquid passage 17A is closed by the valve member 2A of the sound vibration reduction valve as will be described later. In addition, the orifice forming member 30 allows the brake fluid to slightly flow between the M / C side liquid passage 4 and the W / C side liquid passage 5 via the liquid passage 17A.

As described above, the inlet solenoid valve 1 and the sound vibration reduction valve 2 are integrated into the actuator housing 3 so that both the solenoid valve 1 and the sound vibration reduction valve 2 are operated during normal brake operation in ABS. The state shown in 1 is maintained. Therefore, the hydraulic pressure generated in the M / C by depressing a pedal (not shown) remains as it is, through the fluid passage 4 through the communication passage 2B, the fluid passage 17A, and the fluid passage 13, and from the W / C side fluid passage 5 to the W / C. The hydraulic pressure on the W / C side is returned to the M / C side by returning the depression.

Further, when the M / C side hydraulic pressure becomes higher than the W / C side hydraulic pressure by a predetermined value or more during ABS control, in the sound vibration reduction valve 2, the valve member 2 A causes the spring force of the spring 21. The liquid passage 17A and the communication passage 2B of the valve member 2A communicate with each other only slightly in a narrowed form via the orifice formed in the orifice forming member 30. . Thus, the W / C side can be gradually increased in pressure, the on / off operation of the inlet solenoid valve 1 related to the operation can be controlled, and the sound vibration can be reduced.

In the above-described embodiment, the case where the sound vibration reduction valve is integrated with the inlet solenoid valve for one system has been described. For example, for three systems of left and right front wheels and rear wheels. In the case of the control, the sound vibration reducing valve may be incorporated into each of the three inlet solenoid valves incorporated in the actuator housing with the configuration shown in FIG. In this case, it goes without saying that a mechanism provided on the hydraulic pump side for reducing sound and vibration is shared.

[0014]

[Effect of device]

 As explained above, according to the present invention, the master cylinder side fluid passage to the solenoid valve of the actuator housing is kept liquid-tight and slidable in the actuator housing, and the difference in the fluid pressure is predetermined. Since the solenoid valve is integrated with a hydraulic control valve that closes so that it can communicate with the wheel cylinder side only through the throttle when the value exceeds the value, the sound and vibration reduction mechanism can be used as a compact actuator. It can be incorporated into a housing, and the housing itself can be made compact, and effective hydraulic pressure control and sound vibration reduction can be achieved for each system.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of the configuration of the present invention.

[Explanation of symbols]

 1 Inlet Solenoid Valve 2 Sound Vibration Reduction Valve 2A Valve Member 2B Communication Passage 3 Actuator Housing 3A Valve Holding Hole 3B Cylinder Part 3C Bottom 4,5,13 Liquid Channel 6 Outer Cylinder 7 Inner Cylinder 8 Plunger 9 Mover 10 Valve Body 11 , 21 Spring 12 Valve seat 14, 20 Filter 15 Solenoid 16, 18 Seal member 17 Cylindrical part 17A Liquid passage 17B Outer peripheral surface 19 Cup seal 30 Orifice forming member

Claims (1)

[Scope of utility model registration request] 1. An electromagnetic valve disposed in a liquid passage from a master cylinder side of an actuator housing to a wheel cylinder side, the hydraulic pressure of the master cylinder side and the wheel cylinder side being controlled by a control operation of the electromagnetic valve. In a hydraulic control device for an antilock brake, which is controlled so as to be able to communicate from the master cylinder side to the wheel cylinder side when the difference becomes a predetermined value or more, in the master cylinder side liquid path to the solenoid valve of the actuator housing, the actuator The hydraulic control valve that is kept liquid-tight and slidable in the housing and that closes so that it can communicate with the wheel cylinder side only through the throttle when the hydraulic pressure difference exceeds a predetermined value A hydraulic control device for an anti-lock brake, which is provided integrally with a valve.