Railway electro-pneumatic brake valve and emulation method

摘要

An electro-pneumatic brake control valve for performing electronic emulation is provided wherein multiple electronic valves control braking operations on freight cars. Multiple pressure sensors are preferably used, and particularly a brake pipe pressure sensor for detecting pneumatic brake commands. In addition to using electronic valves to control brake application and release operations, an electronic quick service valve can selectively exhaust brake pipe to the atmosphere in a controlled rate and amount to assist the propagation of a quick service application and an electronic accelerated release valve can selectively connect emergency reservoir to brake pipe to assist in restoring brake pipe pressure and in propagating a direct release of the brakes. The electro-pneumatic control valve also preferably includes a microprocessor for signal and command interpretation and valve control.