Electropneumatic air brake control system for railway vehicles

Details Electropneumatic air brake control system for railway vehicles Electropneumatic air brake control system for railway vehicles

1990-04-02

1991-11-12

Graham, Mathew C.

Fluid-pressure and analogous brake systems

Multiple systems

Fluid pressure and electric

303 15, 303 20, 303 33, B60T 1370

Patent

active

050642510

ABSTRACT:
An electromagnetic air brake control system including a module portion and an integral relay valve portion. The module portion includes a brake pipe cut-off valve. A bistable electropneumatic valve device pneumatically connected to the brake pipe cut-off valve. A pole changing relay electrically connected to an electric coil of the bistable electromagnetic device. The pole changing relay having an electric coil connected to a d.c. voltage. A quick release relay having an electric connection to the d.c. voltage and having contacts connectable to contacts of the pole changing relay. A pair of relay driver circuits supplied by a supplemental power supply for causing the electric coils of the pole changing and quick release relays to be energized and deenergized in accordance with output signals received from a command control circuit and a monitor checking circuit.

REFERENCES:
patent: 4364610 (1982-12-01), Williams
patent: 4598953 (1986-07-01), Wood et al.
patent: 4859000 (1989-08-01), Deno et al.
patent: 4971399 (1990-11-01), Balukin et al.

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