Exhaust gas recirculation valve assembly

Details Exhaust gas recirculation valve assembly Exhaust gas recirculation valve assembly

1990-06-13

1991-03-12

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Including solenoid

251337, 251214, 123571, 137340, F16K 3106, F16K 4100, F16K 4900

Patent

active

049987070

ABSTRACT:
An exhaust gas recirculation valve assembly for controlling the recirculation of exhaust gas in an internal combustion engine has an electrically operated valve member that meters flow of exhaust gas through an exhaust gas chamber. A valve member has a valve stem extending to an actuator which is isolated from the base housing the exhaust gas, and the valve is surrounded by a pair of spring-biased seals that seal openings around the valve stem into the actuator and the exhaust gas chamber. The seal closing the actuator opening has an inverted, cup-shaped configuration which encloses the valve stem between the actuator and the base thereby preventing impingement thereon of contaminants which could be carried into the actuator.

REFERENCES:
patent: 4611632 (1986-09-01), Kolchinsky
patent: 4694812 (1987-09-01), Wendt
patent: 4725040 (1988-02-01), Fornuto et al.
patent: 4749167 (1988-06-01), Gottschall
patent: 4782811 (1988-11-01), Hewette et al.
patent: 4805582 (1989-02-01), Braun et al.

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