B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/12
B60T 13/68 (2006.01)
Patent
CA 1111464
(Case No. 7012) ABSTRACT OF THE DISCLOSURE A brake control system for a railway transit-type train having a control car, on which an electrical brake command is provided, and one or more controlled cars. The electric brake command is converted to a fluid pressure control signal that is connected to a load-adaptive relay valve device on the control car, as well as on each controlled car. Each load- adaptive relay valve is adjusted according to the load condition of a respective car so that the brake pressure of each car is developed consistent with its particular load and in accordance with the brake command in effect. In one embodi- ment of the invention, the electric brake command is a digital binary code formed by a three-wire control line and converted on the control car to a fluid pressure brake command signal by conventional electro-pneumatic valves and a multi-diaphragm relay valve device. One alternate embodiment contemplates an electronic digital/analog converter in series with an electric/pressure transducer, while another alternative embodiment deals with converting an analog electric brake command signal to a fluid pressure brake command using an electric/pressure transducer.
333702
Fetherstonhaugh & Co.
Nippon Air Brake Co. Ltd. (the)
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