KR20050110057A - Brake system for wheel un-lock - Google Patents

Abstract

The present invention relates to a brake system for preventing locking of wheels, the brake system of a wheeled vehicle having a pressure reducing means for changing the operating pressure of the brake pipe in the brake system of the vehicle is locked brake operating pressure inside the pipe of the rotating wheel. By decompressing properly by the decompression means in the range where the phenomenon does not occur, the maximum braking effect can be seen within the minimum braking distance without slippage of the wheel due to the locking phenomenon of the wheel.

In detail, the present invention provides a brake system mounted on a vehicle moving with wheels, the wheel sensor detecting the speed of the wheel, the vehicle speed sensor detecting the moving speed of the vehicle, each wheel sensor and The injector 10 including a control device 30 for receiving a signal value of the vehicle speed sensor and outputting a control signal, a solenoid operated by receiving the signal from the control device 30, and a pressure generated during decompression. The reservoir 20 storing the discharge working fluid of the injector 10, and when the brake pressure by the brake operation is released to the reservoir 20, return the storage oil of the reservoir 20 to the master cylinder through the brake pipe. The note consists of a return spring.

The brake system for preventing locking of wheels according to the present invention provides a sliding phenomenon of wheels caused by the mutual difference between the static friction coefficient and the sliding friction coefficient and the motion friction coefficient of the wheel and the ground when the brake pressure generated during the initial brake operation acts on the wheel. The brake operation pressure is sent to the actuator by a signal that the controller 30 properly depressurizes the pressure until the locking phenomenon is released, so that the locking phenomenon is released and smooth stop without slipping is possible. By acting, the inertia can be offset by the brake operation.

Description

Brake system for locking wheels {BRAKE SYSTEM FOR WHEEL UN-LOCK}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake system of a vehicle, and a conventional brake device is made with an emphasis on eliminating slippage of wheels in order to shorten its braking distance. In the case of the anti-lock brake system (hereinafter ABS), the brake system was developed to maximize the friction between the wheels and the road surface by maintaining the sliding friction coefficient due to the sliding of the wheel to the static friction coefficient. It is a device that minimizes the sliding distance between the road surface and the wheel by repeating the locking and unlocking of the wheel repeatedly.

In order to operate the above-described brake system, a solenoid valve capable of opening and closing the pressure of the brake pedal 60 and / or the pump to the brake pipe, a hydraulic pump capable of pressurizing the brake pipe, and the hydraulic pump An electric motor that can be driven, a control device that outputs a control signal to the electric motor, a wheel sensor of a wheel that gives a signal value to the control device and a vehicle speed sensor for verifying and calculating the signal of the wheel sensor.

However, such a hydraulic circuit has a bad effect on fuel efficiency because heavy components such as a hydraulic pump and an electric motor are used.

In addition, the rotation of the electric motor consumes a large amount of electricity, thereby reducing the power efficiency.

In addition, the purpose of reducing the total distance of sliding of the wheel and the road surface by reducing the sliding opportunity of the road surface and the wheel rather than the purpose of preventing slip by appropriate decompression. Therefore, the braking performance is relatively shorter than the braking distance of the general brake system in which the road surface and wheel sliding occur, but the maximum braking efficiency has not been reached.

In addition, since various types of parts are used, a high probability of failure and a lot of maintenance costs are required, which is not economical.

In order to solve the above problems, the present invention is to replace the hydraulic pump, the electric motor and the solenoid valve as a weight component with a lightweight injector 10 and the reservoir 20 to improve fuel economy,

At the time when the wheel slip occurs during the brake operation, a control signal from the control device 30 is sent to the injector 10 so that the working fluid of the brake pipe is drawn out by the injector 10 to the proper flow rate to the reservoir 20. To obtain a decompression effect, and the pressurization action is caused by the operation of the brake pedal 60 to simplify the structure and thereby improve the economy.

The braking distance of the brake is minimized by maintaining the traction force between the wheel and the road as much as possible by the appropriate control signal of the control device 30.

The brake system for preventing locking of the wheel according to the present invention is applied to the brake system of all means of transportation moved by the wheel, and the structure after the operation of the brake operating mechanism, for example, the brake pedal 60 or the brake lever is made. To explain.

Therefore, the brake system for preventing locking of the wheel according to the present invention includes a vehicle speed sensor for detecting a speed of a vehicle such as an automobile or an airplane when the brake pressure is transmitted to each of the wheels by increasing the pressure in the brake pipe and braking is performed. A control device for calculating a slip ratio between the wheel and the road surface by calculating a wheel sensor for sensing the rotational speed of each wheel of the vehicle and a signal value of the vehicle speed sensor and the wheel sensor and outputting a control signal of each wheel ( 30), the injector 10 including the solenoid operated according to the control signal of the control device 30, and the working fluid extruded from the injector 10 can be stored without leakage and one inlet and one A reservoir 20 having an outlet and having a check valve 40 for preventing backflow in the outlet direction and having a return spring 70 installed thereon to allow a return due to a pressure difference is provided. It is configured to have.

Here, the injector 10 and the reservoir 20 of the components are configured in a block form, the control device 30 receives the control command already processed from an electronic control device, such as an ECU of a vehicle simply by injecting It may be manufactured by dividing the method into a solenoid operation signal of (10) and a method of generating a control signal by calculating and processing the values of the wheel sensor and the vehicle speed sensor with a separate processor.

In addition, the control signal of the control device 30 may output an operation signal to the solenoid of the injector 10 when the rotation of the wheel is completely stopped or just before the rotation of the wheel is completely stopped according to the slip ratio of the wheel.

In addition, the injector 10 has an inlet and an outlet and a check valve 40 is built in the outlet side to prevent backflow, and a piston (PISTON) or a plunger (PLUNGER) is operated inside by a solenoid and operated at high pressure. The purchase and fabrication cost is low because of the general construction configured to extrude the fluid to the outlet nozzle.

In addition, the injector 10 has a structure that has the advantage that the reaction rate and pressure performance is verified and convenient to use.

The brake system for preventing locking of the wheel according to the present invention releases the brake piping transfer pressure of the wheel from the injector 10 to the reservoir 20 when a significant difference in the rotational speed of the wheel occurs or stops compared to the speed of the vehicle. By reducing the pressure, the braking force of the brake is reduced to prevent the wheels from locking, and the braking force can be optimally used by maximizing the static friction coefficient rather than the sliding friction coefficient of the road surface and the wheel.

In addition, by reducing the braking distance and the operating time of the injector 10 of the front wheel with an effective braking force, there is also an advantage that can be canceled the forward pull phenomenon due to the momentary stop.

1 is a configuration diagram of a brake showing an embodiment according to the present invention

2 is a structural diagram showing a basic configuration of a conventional ABS

3 is a structural diagram of an injector 10 applied according to the present invention.

3 is a block diagram showing an example of a circuit configuration according to the present invention;

(Description of Major Symbols in the Drawing)

10: INJECTOR

20: RESERVER

30: CONTROLLER

40: CHECK VALVE

50: Pressure distributor

60: brake pedal

70: return spring

Claims (4)

In the brake system for preventing wheel locking, A vehicle speed sensor for measuring the driving speed of a vehicle equipped with wheels, a wheel sensor for measuring the actual rotation speed of the wheel, and a lock phenomenon may be generated by calculating the slip ratio of the wheel by receiving signals from the vehicle speed sensor and the wheel sensor. A control device 30 for selecting a wheel to be generated and outputting a control signal, an injector 10 for ejecting a working fluid in the pipe at high pressure by operation of a solenoid in response to a signal from the control device 30, Brake system for preventing locking of the wheel having the injector 10 and the reservoir 20, characterized in that consisting of a reservoir (20) for receiving and storing the working fluid by the operation of the injector (10). According to claim 1, wherein the injector 10 is a pressure reducing means composed of a structure for extruding the working fluid in a small amount of high pressure by the solenoid operation directly to the pipe branched to the wheel of the brake pipe on the input side of the injector 10. Is connected, the brake system for preventing locking of the wheel with the injector 10, characterized in that there is built-in check valve 40 for preventing the back flow According to claim 1, wherein the reservoir 20 has one inlet and one outlet, the inlet side of the reservoir 20 is connected to the outlet side of the injector 10, the outlet side of the reservoir 20 It is connected to the inlet side of the injector 10 of the brake pipe, and the check valve 40 is built into the outlet side of the reservoir 20 and passes only in the inlet side direction of the injector 10. When the pressure is greater than the pressure in the reservoir 20, the working fluid can be stored in the reservoir 20, and when the pressure in the brake pipe is lower than the pressure in the reservoir 20, the check valve of the reservoir 20 ( A brake system for preventing locking of the wheel including the reservoir 20, comprising a return spring 70 for flowing a working fluid into the brake pipe by means of 40. The method of claim 1, In the case of a vehicle, the control device 30 is compatible with the communication protocol of the electronic control unit (ECU), so that the control device 30 receives the ABS operation signal, which is a calculation result of the electronic control device, to the injector 10. It may also serve only to supply power to the solenoid of the control device having a self-diagnosis circuit including a sensor and a program that can detect whether the operation of the injector 10 and the reservoir 20 is normal or abnormal (30) Brake system for locking wheels