Brake gear for vehicles

Details Brake gear for vehicles Brake gear for vehicles

1979-03-19

1980-12-16

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple systems

Fluid pressure and electric

303 15, 303 22R, B60T 1374

Patent

active

042392926

ABSTRACT:
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 embodiment 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 electric 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.

REFERENCES:
patent: 3944287 (1976-03-01), Nagase
patent: 4073541 (1978-02-01), Nagase

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