Pressure acquisition device and brake control device and method for rail vehicle

Abstract

The invention provides a railway vehicle pressure acquisition device and a braking control device and method. The pressure acquisition accuracy can be improved, further dynamic vehicle weight can be more accurately obtained, and the calculation precision of braking power can be improved. According to the pressure acquisition device, the bogie of a railway vehicle is provided with a first air spring and a second air spring which are located on the left side and the right side, the pressure acquisition device comprises a balancing valve, the balancing valve is provided with a first pressure input port, a second pressure input port and a pressure output port, the first pressure input port is communicated with the air supply pipeline of the first air spring, the second pressure input port is communicated with the air supply pipeline of the second air spring, the pressure output port is used for outputting the average value of the air supply pressures of the first pressure input port and the second pressure input port and balancing the vehicle weight. The braking control method comprises the steps that the average value of the air supply pressures of the air springs in the bogie is obtained and serves as an acquired pressure value; the vehicle weight is calculated according to the acquired pressure value; required braking power is calculated and output according to the vehicle weight.

Description

technical field [0001] The invention relates to the technical field of rail vehicles, in particular to a pressure acquisition device, a braking control device and a method for rail vehicles. Background technique [0002] The traction and braking functions are the two most basic and most critical functions of rail vehicles. In order to determine the braking force during the braking process, it is necessary to collect vehicle weight information, and then the BCU calculates the braking force. [0003] In order to realize the collection of the dynamic load of the vehicle weight during the operation of the vehicle, the air spring pressure is generally used as the input parameter to calculate the dynamic load of the vehicle. In the CRH2 series EMU, the air spring pressure load arranged diagonally in a single car is now used as the input parameter for dynamic vehicle weight calculation. [0004] However, in the actual operation of the vehicle, due to the influence of factors such ...

Images