Delayed turn-off control for vehicle pumping device

Details Delayed turn-off control for vehicle pumping device Delayed turn-off control for vehicle pumping device

1983-11-04

1985-05-21

Witkowski, S. J.

Electricity: motive power systems

Automatic and/or with time-delay means

Pressure in a fluid or granular material

318484, 303 12, 303 20, B60T 1372

Patent

active

045189030

ABSTRACT:
Disclosed is a control for pumping devices in vehicle application. Upon closure of a brake actuator switch (4) subsequent to actuation of a power switch (6) a power transistor (81) becomes conductive and a DC voltage from batteries (5) is fed to a DC motor (2). The brake actuator switch when brought into an open position permits supply of the DC voltage to the base of the power transistor through a time constant circuit (85, 86) for a limited period of time, so that the power transistor becomes conductive to supply the DC voltage to the DC motor for that period. The DC motor activates a pump (1) which in turn operates a pressure-operating unit (10).

REFERENCES:
patent: 3681671 (1972-08-01), Elliott
patent: 3745781 (1973-07-01), Rasmussen
patent: 4000450 (1976-12-01), Nurnberg
patent: 4017778 (1977-04-01), Koch
patent: 4097791 (1978-06-01), Bivens et al.
patent: 4200826 (1980-04-01), Calusio
1982 Oldsmobile Cutlass Ciera and Omega Service Manual, 1981 General Motor Corp., pp. 8A-337, 8A-301, 8A-1, 0.

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