Pressure control device for equalizing reservoir of motor vehicle

Abstract

The invention discloses a pressure control device for an equalizing reservoir of a motor vehicle. The pressure control device comprises a closed-loop main control part and a backup control part, wherein the closed-loop main control part comprises a pressure sensor, an air inlet branch, an air exhaust branch and a proportion controller; the pressure sensor is connected into the equalizing reservoir; the air inlet branch is formed by the serial connection of a main air control cock, a pressure regulating valve, an air inlet high-speed electropneumatic valve and a conversion valve in sequence; the main air control cork is connected with a main air delivery outlet, and the conversion valve is connected into the equalizing reservoir. The air exhaust branch is composed of an air exhaust high-speed electropneumatic valve and a conversion valve connected into the equalizing reservoir. The air inlet high-speed electropneumatic valve and the air exhaust high-speed electropneumatic valve are respectively connected with the control end of the proportion controller, and the signal input end of the proportion controller is connected with the output end of the pressure sensor. The backup control part comprises a control cork, a pressure regulating valve and a backup brake valve which are sequentially connected in series; the control cork is connected with the main air delivery outlet, and the backup brake valve is connected into the equalizing reservoir. The pressure control device carries out closed loop control on the pressure of the equalizing reservoir and has high controlling precision, and meanwhile adopts redundancy control on the pressure of the equalizing reservoir so as to improve the controlling reliability; the equalizing reservoir can automatically reduce pressure and discharge air to carry out automatic protection when system failure or power failure occurs, so that the safety of the motor vehicle can be improved.

Description

technical field [0001] The invention relates to the field of brake control systems in railway locomotives, in particular to a pressure control device for equalizing air cylinders of locomotives. Background technique [0002] At present, railway locomotives are developing in the direction of high speed and heavy load. This development trend puts forward newer and higher requirements for the train braking control system. For the locomotive braking control system, whether it is to precisely control the braking system of a single locomotive or synchronously control the combined train braking system through the locomotive synchronous control system, it is necessary to accurately control the pressure of the equalization air cylinder. However, the existing domestic electric locomotives use the DK-1 locomotive electro-pneumatic brake, which uses open-loop control for the control of the balanced air cylinder, and the pressure control accuracy is low, so it cannot fully adapt to the r...

AI Technical Summary

Problems solved by technology

However, the existing domestic electric locomotives use the DK-1 locomotive electro-pneumatic brake, and the control of the equalizing air cylinder is an open-loop control, and the pressure control accuracy is low, so it cannot fully adapt to the requirements of modern railways on the train braking system. Control requirements

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