Quick service function for railway freight brake control valve d

Details Quick service function for railway freight brake control valve d Quick service function for railway freight brake control valve d

1991-05-06

1992-06-02

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Releasing

Control pipe

303 38, 303 81, 303 86, 303 36, B60T 1134, B60T 1704

Patent

active

051181665

ABSTRACT:
An accelerated application valve having a cyclic mode of operation during one phase of which a local quick service reduction of brake pipe pressure occurs and a steady state mode of operation during which a continuous local quick service reduction of brake pipe pressure is achieved. The specific mode of operation is dictated by a control signal that varies with the degree of service brake application called for, this control signal being the "breather" pressure at the ABD/ABDW Control Valve emergency portion.

REFERENCES:
patent: 3369847 (1968-02-01), Lee
patent: 3407009 (1968-10-01), Racki
patent: 3716276 (1973-02-01), Wilson et al.
patent: 4653812 (1987-03-01), Engle

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