Circuit arrangement for monitoring and controlling the pressure

Details Circuit arrangement for monitoring and controlling the pressure Circuit arrangement for monitoring and controlling the pressure

1985-12-02

1987-10-13

Reger, Duane A.

Fluid-pressure and analogous brake systems

With pump

Pressure control

303 61, 303 65, B60T 1718

Patent

active

046994351

ABSTRACT:
To monitor and control the pressure in the auxiliary pressure supply system of a hydraulic motor vehicle brake system, a circuit arrangement is employed which is provided with a door-contact switch (24) which closes when the driver's door of the motor car is opened and which at a pressure in the auxiliary pressure supply system (11-16) below the telltale threshold activates the hydraulic pump (11) irrespective of the activation of the ignition. Moreover, a holding circuit (25, 26, 30, D30) is provided through which, after closure of the driver's door, the hydraulic pump (11) continues to operate until the telltale pressure threshold or responding threshold is reached or exceeded.

REFERENCES:
patent: 1448469 (1923-03-01), Steinkeller
patent: 3549207 (1970-12-01), Hayes

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