Pressure supply system especially for brake systems of motor veh

Details Pressure supply system especially for brake systems of motor veh Pressure supply system especially for brake systems of motor veh

1986-10-22

1989-07-18

Kashnikow, Andres

Fluid-pressure and analogous brake systems

With pump

Pressure control

303DIG3, 73744, 200 814, 340452, B60T 1318, G01L 716, H01H 3524

Patent

active

048488470

ABSTRACT:
A pressure supply system for the generation of the auxiliary pressure of a hydraulic brake system for motor vehicles comprises an accumulator, a hydraulic pump driven by electromotive force and a pressure switch (1) controlling the turning on and off of the hydraulic pump. The pressure switch (1) includes a switch piston (2) having a piston rod (5) mechanically actuating in a pressure-responsive manner, successively, two or three switches (8,9,10). The pump motor (26), by way of these switches, and by way of a relay, is turned on when a bottom pressure limit value (P.sub.U) is reached, and turned off when the upper pressure limit value (P.sub.O) is reached and exceeded. A holding circuit is connected in the electric circuit, in which are provided the switches (8,9,10) of the pressure switch (1), which holding circuit ensures an abrupt switch-over of the relay into the other switching position when a slow approach of a pressure (p) to the pressure limit values (p.sub.U, P.sub.O) causes fluttering of the relay contacts.

REFERENCES:
patent: 903892 (1903-11-01), Schneider
patent: 2999912 (1961-09-01), Kincaid et al.
patent: 3277441 (1966-10-01), Gutjaht
patent: 4402554 (1983-09-01), Belart
patent: 4523791 (1985-06-01), Belart et al.
patent: 4753492 (1988-06-01), Leiber et al.

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