Patent ID: 6302370
Filing Date: 2001-10-16
Classification: F01L,F16K

Abstract:
A system for decelerating a linearly displaceable valve undergoing a closing motion, said system having a housing, a first hydraulic fluid chamber provided in said housing, and means for displacing said valve responsive to the supply of hydraulic fluid to said first hydraulic chamber, wherein said system comprises:a second hydraulic fluid chamber wherein hydraulic pressure in said second hydraulic fluid chamber opposes the valve closing motion as said valve approaches a closed position; andmeans for throttling the flow of hydraulic fluid between said second and first hydraulic fluid chambers in response to a displacement of said throttling means by said valve displacing means,wherein a throttling flow area is progressively reduced as said valve approaches said closed position, andwherein said means for throttling comprises a plunger having an internal passage for providing selective hydraulic communication between said first and second hydraulic fluid chambers.