Flow restriction controlled variable engine valve system

Details Flow restriction controlled variable engine valve system Flow restriction controlled variable engine valve system

1992-09-25

1993-08-10

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123 9016, F01L 134, F01L 902

Patent

active

052339513

ABSTRACT:
A flow restriction controlled variable engine valve system includes a housing slidably mounted in the engine housing and movable therein in response to movement of an engine cam. A sleeve is telescoped within the housing in fluid communication with the engine oil supply and a portion of the housing. A control rod is carried by the sleeve and projects into the aforementioned portion of the housing to restrict fluid flow therebetween. A check valve is carried by the housing and closes off the fluid communication between the housing and the sleeve after movement of the housing in response to cam movement to lock up the sleeve and housing for further movement together with the sleeve being operatively connected to the valve to open it upon further movement of the locked up sleeve and housing. A velocity reduction spring is interposed between the sleeve and the valve.

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