System and method for supplying fluid under pressure for a vehic

Details System and method for supplying fluid under pressure for a vehic System and method for supplying fluid under pressure for a vehic

1985-08-13

1987-02-03

Butler, Douglas C.

Fluid-pressure and analogous brake systems

With pump

188358, 303 11, B60T 802, B60T 1314

Patent

active

046405550

ABSTRACT:
A system for supplying fluid under pressure for a motor vehicle brake system having a pressure supply system including which has a pump, a pressure reservoir, a reservoir pressure switch connected to the pressure reservoir for switching the pump on and off, and a check valve disposed following the pump, and a brake control valve connected to the pump and the pressure reservoir for directing fluid braking pressures into at least one brake circuit which has at least one wheel brake. Between the pressure reservoir and the brake control valve, there is a second check valve through which the pressure reservoir supplies the brake control valve with a pressure medium when the pump is not operating. If the pressure in the pressure reservoir has dropped, because of a withdrawal of pressure medium from it, to such a level that the pressure switch switches the pump on, then the pressure reservoir is not filled by the pump until a pressure is available to the brake control valve which is sufficient for forceful braking, for instance full braking when the brake linings are heated. To this end, a pressure reservoir filling valve is disposed between the pump and the pressure reservoir and is normally closed; this valve is not switched into its open position, via a pressure control inlet, until the above-mentioned predetermined pressure is attained before the brake valve.

REFERENCES:
patent: 3836206 (1974-09-01), Leiber
patent: 4273387 (1981-06-01), Hofer et al.
patent: 4357054 (1982-11-01), Leiber
patent: 4402554 (1983-09-01), Belart

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