Valve assembly

Details Valve assembly Valve assembly

1987-01-21

1988-08-23

Kashnikow, Andres

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303115, 13759617, B60T 1368, B60T 836

Patent

active

047656930

ABSTRACT:
A valve assembly for an anti-skid brake system has at least two valves disposed parallel to one another. Both valves are embodied in the manner of check valves having closing springs. To open the valves, there is an armature displaceable by an electromagnet; the armature opens the first valve automatically via a rigid opening tappet and opens the second valve, via another opening tappet and a spring associated with it, only when a pressure urging the second valve in the closing direction does not exceed a preselected pressure difference relative to an armature chamber. This has the advantage that despite the high pressure drop, the quantity of pressure fluid per unit of time that flows through the valve assembly does not exceed a preselected threashold value in the anti-skid regulation situation; on the other hand, without anti-skid operation, a rapid buildup of brake pressure is possible by furnishing a larger flow cross section.

REFERENCES:
patent: 3989063 (1976-11-01), Brouavers et al.
patent: 4138165 (1979-02-01), Blomberg et al.
patent: 4141595 (1979-02-01), Leiber
patent: 4155603 (1979-05-01), Harries
patent: 4422695 (1983-12-01), Farr
patent: 4640558 (1987-02-01), Nomura et al.

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