Electro-pneumatic brake system and controller therefor

Details Electro-pneumatic brake system and controller therefor Electro-pneumatic brake system and controller therefor

1996-12-19

1999-08-10

Young, Lee W.

Fluid-pressure and analogous brake systems

Load control

Railway vehicle

303 228, 303 969, B60T 818

Patent

active

059347651

ABSTRACT:
A brake control system for a railroad freight car having an electro-pneumatic brake controller in which a self-lapping valve assembly is operated by a constant spring load acting through a first class operating lever. An electric stepping motor under control of a microprocessor is employed to change the fulcrum point of the operating lever and thereby vary the ratio of the operating lever in order to obtain different braking pressures from the self-lapping valve assembly according to an electric control signal transmitted to the microprocessor.

REFERENCES:
patent: 3814483 (1974-06-01), Coiner et al.
patent: 3838893 (1974-10-01), Dalibout et al.
patent: 4441764 (1984-04-01), Newton
patent: 4572586 (1986-02-01), Washbourn
patent: 5669674 (1997-09-01), McKay et al.

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