Patent ID: 7240970

Claim:
A brake controller for a locomotive including a train brake pipe, a locomotive brake pipe, a brake cylinder, a control valve being responsive to pressure in the train brake pipe to produce brake apply and brake release signals at an output, and a relay valve having first and second control inputs and having a source input and an exhaust input selectively connected to an output in response to the control inputs; the first control input being selectively connected to one of the output of the control valve and the locomotive brake pipe; and the second control input being selectively connected to the locomotive brake pipe when the control valve output is a release signal; and the brake controller further comprising: a first pressure transducer connected to the locomotive brake pipe; a mode switch having lead and trail modes; a first electro-pneumatic valve connected to the control valve which, when activated, causes the control valve to produce a release signal; and an electronic controller connected to the first pressure transducer, the mode switch and the first electro-pneumatic valve, and activating the first electro-pneumatic valve for brake release pressures in the locomotive brake pipe when the mode switch is in the trail mode.