Patent ID: 7631949
Filing Date: 2009-12-15
Classification: B60T

Abstract:
1. A train including a brake pipe and an electrical train line extending from at least one locomotive through at least first and second cars which are adjacent to each other, wherein: a brake signal pipe connects the first and second cars; the first car includes a first brake cylinder, a first reservoir, an electro-pneumatic brake valve responsive to electric signals on the train line to produce a first pneumatic apply brake signal from the first reservoir and first pneumatic release brake signal for the first brake cylinder and the brake signal pipe, and a first valve to transmit the first brake signals to the brake signal pipe and to isolate the connection to the brake signal pipe for a break-away of one of the first and second cars; and the second car includes a second brake cylinder, a second reservoir, and a pneumatic brake control valve responsive to the first brake signals on the brake signal pipe and brake pipe pressure in the brake pipe to produce a second pneumatic apply and release brake signals for the second brake cylinder corresponding to the first apply and release brake signals for a non-emergency pressure in the brake pipe and to produce a second pneumatic apply brake signal from the second reservoir for an emergency pressure in the brake pipe and also the first brake signal being zero.