Canister purge solenoid valve
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United States of America Patent
Stats
-
Feb 20, 1990
Grant Date -
N/A
app pub date -
May 11, 1989
filing date -
May 11, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A canister purge solenoid valve is constructed and arranged to provide reduced operating noise and decreased armature wear as the armature reciprocates within a bore in response to solenoid energization and de-energization. The armature contains an elastomeric valve head that is biased normally closed against the valve seat. When the solenoid assembly is energized, the armature is retracted. The armature's momentum is initially absorbed by the elastomeric valve head making contact with the solenoid assembly at one end of the bore. Final absorption of the armature's momentum is shared by continuing contact of the valve head with the solenoid assembly and by an elastomeric limit stop that is disposed between the armature and the stator. In this way the elastomeric limit stop is not required to absorb the full momentum of the retracting armature.
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Family
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