EGR valve having rest position

Details EGR valve having rest position EGR valve having rest position

2006-03-08

2009-10-27

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

C123S568210, C123S568240

Reexamination Certificate

active

07607638

ABSTRACT:
During normal operation of diesel engines the EGR valve poppet often becomes stuck to the valve seat in the closed position, due to excessive build up of exhaust gas debris, which renders the valve inoperable. This usually occurs after the engine is shut down and the valve is seated. Features, which locate the valve poppet in an unseated position when not in use, are implemented into the EGR valve design to prevent this sticking from occurring, thereby increasing product robustness and prolonging product life.

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