Patent ID: 6244229
Filing Date: 2001-06-12
Classification: F01L

Abstract:
A valve lifter for a three-dimensional cam accommodated in a lifter bore provided in a cylinder head of an internal combustion engine, comprising:a cylindrical outer peripheral surface having a projection engageable with a groove in the lifter bore formed at least partially for preventing rotation of the valve lifter; anda substantially cylindrical accommodation chamber defined by an inner peripheral surface of the valve lifter in which at least a stem end portion of a valve is accommodated,wherein a center axis of the cylindrical outer peripheral surface and a center axis of the accommodation chamber are offset, the projection being formed on the outer peripheral surface at a position corresponding to a thick wall portion at which a distance between the outer peripheral surface and the accommodation chamber generated by the offset becomes substantially maximum, the thick wall portion of the valve lifter being formed by offsetting the inner peripheral surface from the cylindrical outer peripheral surface.