Solenoid operated air control and check valve

Details Solenoid operated air control and check valve Solenoid operated air control and check valve

1994-06-06

1995-06-06

Chambers, A. Michael

Fluid handling

Systems

Flow path with serial valves and/or closures

13761419, 137907, 251 82, 25112922, 60290, F01N 300

Patent

active

054213665

ABSTRACT:
A composite check valve and positively closing electromagnetic solenoid valve, particularly such a valve for regulating the introduction of secondary air into the exhaust stream of an internal combustion engine at selected times during the operation of the engine. The valve comprises an inlet port, an outlet port, a first valve element movable between open and closed positions for nominally regulating the flow of a fluid between the inlet and outlet ports, and an electromagnetic solenoid having a closure element for overriding the first element. The rigid disk or closure element can function by seating against the same seat as the first element, or by "latching" the first element in its closed position. The disclosed embodiment is a flap valve which is modified by superimposing a rigid, movable valve disk over the flap. The rigid disk is connected to the solenoid armature and is movable between an override (closed) position and a disengaged (open) position when the solenoid is energized. The rigid disk may also limit the opening of the flap to regulate the rate of fluid flow through the valve.

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