KR20010105877A - Solenoid valve of brake system for car - Google Patents

Abstract

To correct for any source of non-linearity and noise introduced in the power amplification of a pulse modulated signal, a correction unit is applied in-between the pulse modulator and the switching power amplification stage. The correction unit is controlled to have a compensating effect, by introducing continuous delays on the individual pulse edges on the basis of error information provided by an error processing block. One preferred embodiment of the invention comprises: a Correction Unit with means to control the delays of the individual pulse edges as a function of a control input signal v e ; a state feedback block A with compensation; a reference shaping block R to modify the pulsed reference v r for optimized error estimation; a difference block to generate an error signal and a compensator C to shape this error. The invention makes it possible to implement practical digital to analog power conversion, with efficient compensation of any non-linearity and noise introduced in the switching power stage and filter, such that great efficiency, high performance and low system complexity is combined. Applications are direct digital to audio power conversion and improved general DC-DC or DC-AC power conversion systems controlled from the digital domain.

Description

Solenoid valve for car brake system {Solenoid valve of brake system for car}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve of a brake system for an automobile, and more particularly, to a brake system for an automobile that can perform three operations: apply, hold, and release using one solenoid valve. Relates to a solenoid valve.

The braking device is an important device that functions to decelerate or stop a driving vehicle. The braking device includes a braking energy supply unit, an operation unit, a transmission unit, and the like including a braking function.

As a principle of the braking device, a friction brake that converts mechanical energy into thermal energy using frictional force is most widely used.

The brakes can be divided into main brakes, parking brakes, and auxiliary brakes, where the main brakes are used as important brakes that reduce the speed of the vehicle.

At present, there is a trend to apply an anti-blocking system (ABS) that can guarantee driving safety and steering in any road conditions, for example, road conditions such as dry roads and ice roads.

There are various requirements for ABS, but it must be controlled in response to changes in drawing state, coefficient of friction, and the like, and in addition, a fail-safe function and an interface function must be provided.

In addition, in order to implement ABS, pressure control should be performed. In the ABS device, the pressure control mode should be controlled in three modes of application, hold, and release. Therefore, a valve device capable of implementing the above three modes is essential.

By using two two-way two-position solenoid valves used in the conventional ABS device, three modes of application, hold, and release are implemented.

Some conventional ABS devices use a two-position, three-way solenoid valve without a hold mode.

However, the conventional ABS device uses a two-position three-way solenoid valve without a hold mode and uses the two-position two-way solenoid valve in a state where there is no hold mode. Since two solenoid valves must be used, the number of parts thereof is increased, resulting in a cost increase.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and provides a solenoid valve of a brake system for an automobile which can implement the application, hold, and release modes using a single solenoid valve in an ABS device. There is a purpose.

1 is a cross-sectional view in an application mode of a solenoid valve of a brake system for a vehicle according to the present invention;

2 is a cross-sectional view in a hold mode of a solenoid valve of a brake system for a vehicle according to the present invention;

3 is a cross-sectional view in a release mode of a solenoid valve of a brake system for a vehicle according to the present invention.

<Explanation of symbols on main parts of the drawings>

10 case 11 inlet hole

12: application hole 13: release hole

20: main working body 30: sub working body

40, 41, 42: spring

The present invention provides a case in which an inlet hole is formed along a longitudinal direction on a front surface thereof, and an application hole and a release hole are formed on a side surface thereof, and the application groove is formed through the inlet hole by linearly moving in close contact with the case. Actuator for driving the actuator and the actuator to implement the hold mode and the release mode in which the flow of the hydraulic flow is stopped and the inlet hole is closed and the hydraulic flow is stopped in communication with the inlet hole and the drive unit Characterized in that consisting of.

Here, the actuator is characterized in that it is composed of a main actuator linearly connected to the drive unit, and a sub-operator linearly driven by the main actuator and the spring.

In addition, the main operator body is formed with a protruding portion in the front end to open / close the inlet hole in accordance with the operation of the drive unit, the locking jaw is formed in the rear, the engaging portion is caught, the central portion is cut and connected by a spring It is characterized by.

In addition, the sub-operator is formed with a through passage through which the hydraulic pressure introduced through the inlet hole is formed, the central portion is characterized in that the blocking projection is applied to the spring to control the communication between the application hole and the release hole.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view in an apply mode of a solenoid valve of a brake system for an automobile according to the present invention, and FIG. 2 is a cross-sectional view in hold mode of a solenoid valve of a brake system for an automobile according to the present invention. 3 is a cross-sectional view in a release mode of a solenoid valve of a brake system for a vehicle according to the present invention.

In the solenoid valve of the brake system for a vehicle according to the present invention, an inlet hole 11 is formed along a longitudinal direction in a front side as shown in FIGS. 1 to 3, and an application hole 12 and a release in a side surface thereof. The case 10 includes a case 10 having a hole 13, an actuator 20 that is linearly driven inside the case 10, and a driver (not shown) that drives the actuator 20.

In the above, the actuator (20, 30) is cut into two parts (21, 22) are connected by a spring 42, the main actuator 20 is linearly driven by the drive unit, and the main actuator 20 It consists of a sub-operator 30 is linearly driven according to the linear motion of.

Here, the main operator 20 has a latching jaw (21a) is formed to hold the sub-operator 30, the front and rear projections 22a for moving back and forth in a straight line to open or close the inlet hole (11) The jaw 22b is formed on both sides of the protrusion part 22a, and the spring 41 is provided between the side portions of the inlet hole 11.

The sub-operator 30 is in close contact with the main operator 20, and both ends of the sub-operator are in close contact with the case 10, but the outer side of the central part is in communication with the application hole 12 and the release hole 13. The gap is formed without being in close contact with the silver case 10, and a blocking protrusion 30a that can control the opening and closing of the gap is formed outside the center thereof. A through passage 30b is formed so that the hydraulic pressure flowing through the inlet hole 11 can be moved to the inlet hole 11 and the release hole 13.

In addition, a spring 40 is provided between the blocking protrusion 30a and the case 10 to apply an elastic force to the sub-operator 30 to the rear.

Referring to the drawings the operation of the solenoid valve of the brake system for a vehicle according to the present invention configured as described above is as follows.

First, FIG. 1 is a view illustrating an application mode state in which hydraulic pressure is supplied to the application hole 12 through the inlet hole 11, and the main operator 20 is pushed to the rear and the protrusion 22a is provided. Is in a retracted state so that the inlet hole 11 is opened. That is, it is the state which is pushed backward by the elastic force of the spring 41. FIG. Therefore, in such a state, the hydraulic pressure supplied to the inlet hole 11 passes through the inlet hole 11 and passes through the through passage 30b of the sub-operator 30 to be supplied to the application hole 12. do.

2 is a view showing a hold mode state in which hydraulic pressure is not supplied, and the main actuator 20 moves forward a predetermined length so that the protrusion 22a of the main actuator 20 blocks the inlet hole 11. Will be. Therefore, the hydraulic pressure is not supplied to the inlet hole 11, and the hydraulic pressure is prevented because the blocking projection 30a of the sub-operator 30 blocks the gap between the application hole 12 and the release hole 13. The flow of is not generated.

3 is a view showing a release mode in which hydraulic pressure is supplied from the application hole 12 to the release hole 13, in which the main actuator 20 is further advanced so that the protrusion 22a causes the inlet hole 11 to be released. In addition, the blocking projection 30a of the sub-operator 30 is pushed forward in the state where the sub-operator 30 is caught in the latching jaw 21a of the main operator 20 and the case ( 10) in a position away from the jaw (10a). Accordingly, the hydraulic pressure is not supplied to the inlet hole 11, and the gap between the application hole 12 and the release hole 13 is opened so that the hydraulic pressure provided to the application hole 12 is released. Go to step 13) to enter the release mode.

As such, the solenoid valve of the brake system for automobiles according to the present invention can implement the application mode, the hold mode, and the release mode with one solenoid valve, thereby reducing the number of parts and providing an effect of dramatically reducing the cost. do.

The present invention is not limited to the above embodiments and can be variously modified and implemented by those skilled in the art without departing from the technical gist of the present invention.

Claims (4)

The inlet hole is formed along the longitudinal direction in the front direction, and the case in which the applic hole and the release hole are formed on the side, and the linear movement in close contact with the case inside the case, the hydraulic pressure is applied to the application groove through the inlet hole It is composed of an actuator for implementing the applied mode, the hold mode in which the inlet hole is closed and the flow of hydraulic pressure is stopped, and the release mode in which the application hole and the release hole communicate with each other, and a driving unit for linearly driving the actuator. A solenoid valve of a brake system for an automobile. The method of claim 1, The actuator is a solenoid valve of a brake system for a vehicle, characterized in that composed of a main actuator linearly connected to the drive unit and a sub-operator linearly driven by the main actuator and a spring. The method of claim 2, The main actuator has a protruding portion formed at a front end thereof, and opens / closes the inlet hole according to the operation of the driving unit, and a locking jaw is formed at the rear thereof, and the center portion is cut and connected by a spring. Solenoid valve for automobile brake system. The method of claim 2, The sub-operator has a through passage through which the hydraulic pressure introduced through the inlet hole is formed, and a blocking protrusion for applying a spring is formed at the center portion to control communication between the application hole and the release hole. Solenoid valve.