Susumu Ariga - San Antonio TX Jongmin Lee - San Antonio TX
Assignee:
Southwest Research Institute - San Antonio TX
International Classification:
F01L 310 F01L 102
US Classification:
123 9065
Abstract:
A valve system for use in internal combustion engines includes a means for controllably varying the preload force imposed on a valve spring in correlation with engine speed. At low engine speeds the preload force is maintained at a minimal level whereby the normal load at the cam/follower interface is maintained at a minimal value. At higher engine speeds, the preload force on the valve spring is selectively increased to assure positive closure of the valve head. The increased preload forces are imposed by extending a hydraulically actuated, moveable spring seating surface whereby the installed length of the spring is shortened. The hydraulic actuating fluid is continuously circulated through inlet and outlet ports, communicating with an expandable chamber associated with the moveable seating surface, during low engine speed operation to abate the problem of temperature rise in static fluid systems.
Name / Title
Company / Classification
Phones & Addresses
Jongmin Lee
PYAN, LLC Business Services at Non-Commercial Site
10137 Long Pt Rd STE C, Houston, TX 77043 12625 Memorial Dr, Houston, TX 77024
Youtube
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