Charging cut-off valve arrangement for microprocessor-based elec

Details Charging cut-off valve arrangement for microprocessor-based elec Charging cut-off valve arrangement for microprocessor-based elec

1993-04-26

1994-07-26

Obertleitner, Robert J.

Fluid-pressure and analogous brake systems

Multiple control

Fluid and electric

303 20, B60T 1514

Patent

active

053322975

ABSTRACT:
A microprocessor-based locomotive brake control system having an electropneumatic brake pipe pressure regulating circuit via which a train brake pipe pressure is controlled and a normally closed charging cut-off valve between the brake pipe regulating circuit anad the brake pipe. The charging cut-off valve is electropneumatically controlled in order to effect opening of the normally closed charging cut-off valve on a controlling locomotive. An arrangement is provided for maintaining the charging cut-off valve open when electric power is lost on a controlling locomotive, while providing for closure of the charging cut-off valve on a non-controlling locomotive irrespective of the presence or absence of electric power.

REFERENCES:
patent: 3583771 (1971-06-01), Dressler, Jr.
patent: 3799623 (1974-03-01), Wickham et al.
patent: 3901558 (1975-08-01), Burkett
patent: 4904027 (1990-02-01), Skantar et al.
patent: 5090780 (1992-02-01), Powell
patent: 5222788 (1993-06-01), Dimsa et al.

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