Control for pumping devices used in vehicles

Electricity: motive power systems – Automatic and/or with time-delay means – Pressure in a fluid or granular material

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Details

318484, 303 20, B60T 1366

Patent

active

045243123

ABSTRACT:
Disclosed is a control for a pumping device in a vehicle application in which, upon throwing a power switch (6), a capacitor (85) is charged and a power transistor (81) is rendered conductive thereby supplying a DC voltage from batteries (5) to a DC motor (2). The DC motor drives a pump (1) which in turn feeds pressure to a pressure-operating unit (10) for storage therein. If a given period of time has elapsed after throwing of the power switch, then the voltage charged on the capacitor increases to make a transistor (83) conductive and the power transistor (81) non-conductive. In other words, the DC motor is operated to provide pressure to the pressure-operating unit for only the given period of time after throwing of the power switch. Furthermore, upon closure of a brake actuator switch (4) another transistor (84) becomes conductive and the above transistor (83) becomes non-conductive. This renders the power transistor (81) conductive and supplies the DC voltage to the DC motor.

REFERENCES:
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patent: 3566229 (1971-02-01), Wickens
patent: 3638091 (1972-01-01), Hosokawa et al.
patent: 3652910 (1972-03-01), Urbain
patent: 3681671 (1972-08-01), Elliott
patent: 3745781 (1973-07-01), Rasmussen
patent: 3949284 (1976-04-01), Wright
patent: 4000450 (1976-12-01), Nurnberg
patent: 4097791 (1978-06-01), Bivens et al.
patent: 4107588 (1978-08-01), Seiler

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