Vehicle brake actuating mechanism

Abstract

The invention discloses a vehicle brake actuating mechanism which comprises an upper valve body, a control port is formed in the side edge of the upper valve body, and a two-way one-way valve is arranged in the upper valve body; the vehicle brake actuating mechanism further comprises a lower valve body which is connected with the upper valve body, wherein an air inlet and an air outlet are formed in the lower valve body, a pneumatic control valve is arranged between the air inlet and the air outlet, and a first pressure sensor is further arranged on the lower valve body; an air passage system which comprises a control air passage and an air inlet passage, wherein a first air inlet electromagnetic valve and a second pressure sensor are mounted on the air inlet passage; and an ECU which is connected with the upper valve body, wherein after a driver steps on a brake pedal, the ECU controls the first air inlet electromagnetic valve to be opened, an air source enters the two-way one-way valve to block pedal air from a control port, the air reaches the air outlet to push the brake executing mechanism to brake, the first pressure sensor monitors the air pressure of the air outlet and feeds back an air pressure signal to the ECU, and the second pressure sensor monitors the air pressure of the air inlet passage and feeds an air pressure signal back to the ECU. The vehicle brake actuating mechanism can realize accurate brake control.

Description

technical field [0001] The invention is used in the technical field of automobile braking, and in particular relates to a vehicle braking actuator. Background technique [0002] The braking process of the semi-trailer is as follows: after the driver steps on the brake pedal, the main brake valve on the tractor generates control gas, actuates the brake actuator of the traditional trailer vehicle, and then passes through more than ten meters of pipelines, emergency Components such as the relay valve reach the brake chamber and push the actuator to move to achieve braking. The disadvantage is that the gas is used as the medium for transmitting the signal. In the actual process of transmitting the signal, the pressure loss along the process is increased due to the long transmission pipeline and the trailer valve Accurate braking control cannot be achieved due to objective reasons such as response hysteresis. Contents of the invention [0003] The object of the present inventi...

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Problems solved by technology

[0002] The braking process of the semi-trailer is as follows: after the driver steps on the brake pedal, the main brake valve on the tractor generates control gas, actuates the brake actuator of the traditional trailer vehicle, and then passes through more than ten meters of pipelines, emergency Components such as the relay valve reach the brake chamber and push the actuator to move to achieve braking. The disadvantage is that the gas is used as the medium for transmitting the signal. In the actual process of transmitting the signal, the pressure loss along the process is increased due to the long transmission pipeline and the trailer valve Accurate braking control cannot be achieved due to objective reasons such as the response hysteresis of

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