Patent ID: 6817592
Filing Date: 2004-11-16
Classification: F01L

Abstract:
An electromagnetic valve actuator, comprising:a valve head that moves between an open position, a middle position, and a closed position; an armature coupled to said valve head; a first cavity surrounding said armature; a solenoid coil that selectively creates an electromagnetic force on said armature to move said valve head between the open position, the middle position, and the closed position; a plunger coupled to said valve head; a second cavity surrounding said plunger and containing a fluid, said second cavity having an inner wall defining a first region, a second region, and a third region; and said first region configured to cooperate with said plunger and the fluid to provide increasing resistance as said valve head moves with respect to the second cavity from the middle position to the closed position, wherein a cross-sectional area of said first region decreases in a direction where said valve head moves from the middle position to the closed position.