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Method and system for controlling brake cylinder pressure of urban rail vehicle

A technology of brake cylinder pressure and urban rail vehicles, applied in brakes, vehicle components, pneumatic brakes, etc., can solve problems such as long pressure response lag time, affecting valve service life, and pressure exceeding accuracy, reducing the difficulty of control, The effect of reducing the number of valve movements and reducing the difficulty of control

Active Publication Date: 2022-04-19
QINGDAO SRI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the technical problems of long pressure response lag time caused by the above-mentioned existing methods, the pressure exceeds the precision requirement and affects the service life of the valve, and proposes a brake cylinder pressure control method and system for urban rail vehicles

Method used

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  • Method and system for controlling brake cylinder pressure of urban rail vehicle
  • Method and system for controlling brake cylinder pressure of urban rail vehicle
  • Method and system for controlling brake cylinder pressure of urban rail vehicle

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Embodiment 1

[0052] Such as figure 1 As shown, this embodiment discloses a specific implementation of a brake cylinder pressure control method for an urban rail vehicle (hereinafter referred to as "method").

[0053] Specifically, the method disclosed in this embodiment mainly includes the following steps:

[0054] Step S1: The electronic brake control unit calculates the final pressure target value and stage pressure target value required by the brake cylinder according to the load, level and the set longitudinal impact rate information;

[0055] Step S2: According to the feedback value of the first pressure sensor behind the relay valve, the electronic brake control unit controls the pre-control pressure to rise according to the stage pressure target value by controlling the charging and exhaust solenoid valve, and the relay valve is based on the actual pre-control pressure. The pressure outputs the brake cylinder pressure; wherein, the first pressure sensor collects the brake cylinder ...

Embodiment 2

[0084] In combination with the brake cylinder pressure control method for urban rail vehicles disclosed in Embodiment 1, this embodiment discloses a specific implementation example of a brake cylinder pressure control system for urban rail vehicles (hereinafter referred to as "system").

[0085] The system includes:

[0086] Electronic brake control unit: Calculate the final pressure target value and stage pressure target value that the brake cylinder needs to apply according to the load, level and set longitudinal impact rate information;

[0087] The first pressure sensor: used to feed back the pressure value of the brake cylinder behind the relay valve to the electronic brake control unit;

[0088] The second pressure sensor: used to feed back the pre-control pressure value before the relay valve to the electronic brake control unit;

[0089] Filling and exhausting solenoid valve: used to convert the compressed air output of the air storage cylinder into the pre-control pr...

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Abstract

The invention discloses a brake cylinder pressure control method and system of an urban rail vehicle. The method includes: the electronic brake control unit controls the pre-control by controlling the charging and exhausting electromagnetic valve according to the feedback value of the first pressure sensor behind the relay valve. The pressure rises according to the stage pressure target value, and the relay valve outputs the brake cylinder pressure according to the actual pre-control pressure; when the brake cylinder pressure and / or pre-control pressure reaches a certain range, the electronic brake control unit The feedback value of the second pressure sensor and the feedback value of the first pressure sensor comprehensively control the pre-control pressure, so that the brake cylinder pressure and the pre-control pressure reach the final pressure target value. It can effectively avoid slow pressure response, and reduce the number of valve actions and the difficulty of control.

Description

technical field [0001] The invention relates to the technical field of locomotive braking control, in particular to a method and system for controlling the brake cylinder pressure of an urban rail vehicle. Background technique [0002] Urban rail transit vehicles need a safe and reliable braking system to ensure punctuality, comfort and safety. The braking system includes functions such as normal braking, emergency braking, holding braking, and ramp start, among which the most commonly used function is normal braking for normal entry and exit parking. [0003] For the urban rail brake control system, the pneumatic brake control unit in the brake control device controls the charge and exhaust valves to release the compressed air in the air storage cylinder according to the electrical signal sent by the EBCU (Electronic Brake Control Unit) The output is converted into the pre-control pressure corresponding to the electrical signal, and then the pre-control pressure is amplifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/68B61H11/06
CPCB60T13/683B61H11/06
Inventor 孙全涛郗开冲杜振振徐逸煌
Owner QINGDAO SRI TECH CO LTD
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