Patent ID: 6705265
Filing Date: 2004-03-16
Classification: F01L,F02B

Abstract:
A four-stroke internal combustion engine with a valve resting mechanism comprising:a valve lifter having a top wall and a side wall; a valve resting mechanism, said valve resting mechanism being interposed between a valve motion cam and a stem of a poppet valve; a valve lifter spring for biasing said valve lifter in a direction in which said valve lifter is normally held in contact with said valve motion cam; a slide pin holder, said slide pin holder being pressed against said valve lifter by said valve lifter spring; and a shim portion having a predetermined thickness for controlling a relative positional relationship with said valve lifter, said shim portion being formed integrally in one piece with said top wall of said valve lifter, wherein a plurality of different valve lifters is provided for being selectively mounted to effect tappet gap adjustment, each of said different valve lifters including said shim portion having a different thickness to affect the relative positional relationship between said slide pin holder and said valve lifter.