Method and device for judging a throttle valve fault in a hydraulic brake system

Abstract

The invention provides a hydraulic braking system throttle valve fault judgment method and device. The method is applied to a hydraulic braking system, and comprises: obtaining the motor state information of a motor; judging whether the motor is in a starting state or not based on the motor state information; when the motor is in a starting state, sampling oil pressure of an energy accumulator inthe hydraulic braking system based on a preset period, and calculating the oil pressure rising rate of the oil pressure of the energy accumulator in the current period based on a sampling result; judging whether the oil pressure rising rate is greater than a first preset oil pressure rising rate or not; when the oil pressure rising rate is greater than a first preset oil pressure rising rate, controlling a first counter to add 1 to a counting result; whether the counting result of the first counter is larger than a first preset value or not is judged, if yes, outputting first prompt information used for representing that the throttle valve of the energy accumulator is abnormal, and guaranteeing safe and reliable operation of a train.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a method and device for judging a fault of a throttle valve of a hydraulic brake system. Background technique [0002] The braking system is a key subsystem in the train system. The performance, stability and reliability of the braking system directly determine the overall safety performance of the train. The braking system of urban rail vehicles is generally a vehicle control or rack control system. Urban rail vehicles generally have strict requirements for installation space and weight reduction. Hydraulic braking systems have the advantages of small size, light weight, and large output force, and are widely used It is suitable for new train systems that require high braking force, such as maglev trains and low-floor trams. [0003] The hydraulic braking system relies on the DC motor drive of the hydraulic unit itself to provide the brake oil source. How to ensure the ...

AI Technical Summary

Problems solved by technology

However, due to the long-term vibration of the train during operation, the adjustment of the throttle valve will become loose, which may cause problems such as closing the throttle valve or reducing the valve opening, affecting the smoothness of the pipeline, resulting in failure of the braking system and endangering the train. safe operation

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