Electrically operated solenoid valve

Details Electrically operated solenoid valve Electrically operated solenoid valve

1988-11-18

1989-07-04

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

25112902, 25112915, B60T 800, B60T 1368

Patent

active

048445592

ABSTRACT:
An electrical solenoid valve has a coil and a movable armature. A first valve element is subject to pressure from an inlet and a second valve element is operated by the armature, when the coil is energized, to close a port in the valve element and so isolate the inlet from a pressure fluid outlet to a brake. The valve element is displaceable under the effect of a pressure differential across it as a result of closing the port, the force derived from the then predominant inlet pressure being transmitted by the second valve element to load a spring device connected to the armature. Such spring loading increases the force tending to release the armature and leads to rapid opening of the port (18), when required.

REFERENCES:
patent: 3719401 (1973-03-01), Peruglia
patent: 3880476 (1975-04-01), Belart et al.
patent: 3921666 (1975-11-01), Leiber
patent: 4050749 (1977-09-01), Harris et al.
patent: 4138165 (1979-02-01), Blomberg et al.
patent: 4655255 (1987-04-01), Rode
patent: 4668024 (1987-05-01), Nakanishi et al.
patent: 4679589 (1987-07-01), Inden et al.

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