Method and device for controlling composite braking of rail electric engineering vehicle

Abstract

The invention discloses a method for controlling composite braking of a rail electric engineering vehicle. The method comprises the steps: obtaining a first signal of braking force needed by the vehicle, calculating electric braking force capable of being provided according to actual running states of the vehicle, outputting a second signal of electric braking force which is actually provided according to the obtained first signal, comparing the first signal and the second signal, outputting a differential value signal of the first signal and the second signal, and controlling the output of air pressure of a function pipe according to a pressure value produced by the differential value signal. Through the method, the composite functions of electric braking and air braking can be achieved, the electric braking force can be utilized to the maximum extent, an energy utilization rate is improved, meanwhile, cost can be reduced, and operability of operators is improved. In addition, the invention discloses a device for controlling the composite braking with the method applied.

Description

technical field [0001] The invention relates to the field of rail power engineering vehicles, in particular to a hybrid braking control method for rail power engineering vehicles. In addition, the present invention also provides a hybrid braking control device applying the above hybrid braking control method. Background technique [0002] Due to the advantages of no pollution, large traction, and low noise, rail electric engineering vehicles have an increasing market share. As one of the main advantages of electric engineering vehicles, electric braking control can not only reduce the wear of the wheel rim and rail surface caused by friction braking, but also reuse the energy generated by braking. [0003] At present, the electropneumatic brakes used in rail power engineering vehicles mainly have two modes, one is the logic type electropneumatic braking system, and the other is the microcomputer electropneumatic braking system. [0004] The logic type electropneumatic brak...

AI Technical Summary

Problems solved by technology

In actual operation, the operator can only choose one of them to control, and it is impossible to realize the simultaneous braking of air brake and electric brake, or the function of automatically supplementing the air brake force when the electric brake is insufficient.

Since the three braking control modes correspond to the three control operating devices, it is not easy to arrange the equipment on the console, making it difficult for the operator to master the operation, which is not conducive to giving full play to the advantages of electric braking

[0005] Although the microcomputer electro-pneumatic braking system can realize the hybrid braking control of the electric braking force and air braking force of rail power engineering vehicles, its control needs to rely on the microcomputer control unit for the application and collection of electric braking force and the combination of electric braking force and air braking force. The distribution of braking force; when performing hybrid braking control, if it is necessary to redistribute the electric braking force and air braking force according to the actual situation, but subject to the influence of the network data exchange frequency and the program running cycle of the control unit, the hybrid control has a certain Delay, that is, the execution of the next command needs to wait for the end of the previous operation cycle

In addition, the microcomputer control unit of the microcomputer electropneumatic braking system is expensive, which makes the cost of the microcomputer electropneumatic control system very high and uneconomical

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