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. MULTI-FUNCTIONAL WATER PUMP CONTROL VALVEThe armature contains an elastomeric valve head that is biased normally closed against the valve seat. When the solenoid assembly is energized,Butterfly Valves 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.Instrumentation Ball Valves In this way the elastomeric limit stop is not required to absorb the full momentum of the retracting armature. In a solenoid actuated valve that comprises a valve seat disposed between an inlet and an outlet, a solenoid assembly that comprises a bore which is coaxial with said valve seat, a stator that is disposed in said bore, an armature that is disposed in said bore between said stator and said valve seat and reciprocates within said bore in response to the energizing and de-energizing of said solenoid assembly, and an elastomeric valve head member that is on said armature externally of said bore and that seats on and unseats from said seat as said armature reciprocates within said bore, the improvement characterized in that an elastomeric limit stop is disposed between said stator and said armature to absorb impact between said armature and said stator as the armature moves away from said seat, said valve head member radially overlaps the solenoid assembly around said bore and is thick enough not only to abut said seat but also to abut said solenoid assembly around said bore as the armature is reciprocated within said bore, and when the armature is retracted into said bore, said valve head member initially contacts the solenoid assembly to initially absorb momentum of the armature, and thereafter the final impact absorption is shared by said valve head member acting against said solenoid assembly around said bore and by said limit stop acting between said stator and said armature. A canister purge solenoid valve is a device that is used in certain evaporative emission control systems of automotive vehicles. Its purpose is to control the flow of fuel vapors from a collection canister, commonly called a carbon canister, to the engine intake manifold. The flow is controlled by means of a pulse width modulated signal that is applied to the valve's solenoid from the engine computer. This in turn produces a corresponding modulation of the valve so that the average open time for the valve during each cycle of the modulating signal is similarly modulated.

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