Patent ID: 6053135
Filing Date: 2000-04-25
Classification: F01L

Abstract:
A valve operating mechanism for operating a single poppet valve of an engine through cooperation with the stem thereof, said valve operating mechanism being comprised of a single cam shaft having a pair of adjacent cams, a pair of adjacent pivotally supported rocker arms, each of said rocker arms being operated by a respective one of said said cams, a first of said rocker arms having an operating portion for direct engagement with the valve stem for operating the valve directly, and means for selectively coupling the second of said rocker arms to said first rocker arm comprising a plunger slidably supported within a bore formed in said first rocker arm, a replaceable adjusting shim engaged by actuating means carried by said second rocker arm, said plunger being engaged by said replaceable adjusting shim, and means for coupling said plunger against movement relative to the first rocker arm for effecting simultaneous movement of the rocker arms for effecting actuation of the valve therefrom through said first rocker arm by the cam associated with said second rocker arm.