Patent ID: 6520135
Filing Date: 2003-02-18
Classification: F01L

Abstract:
An apparatus for adjusting a valve lift, comprising:a tappet casing having a cam contact portion which comes into contact with a cam provided on a camshaft rotatably driven by a crankshaft of an internal combustion engine; lift mode switching means for selectively switching between a high lift mode in which an amount of displacement of one of an intake valve and an exhaust valve of a cylinder corresponding to said tappet casing is equal to an amount of displacement of said cam contact portion of said tappet casing, and a low lift mode in which the amount of displacement of said one of the intake valve and the exhaust valve decreases relative to the amount of displacement of said cam contact portion; restricting means for holding said lift mode switching means to the high lift mode; and urging means for urging in a direction in which the amount of displacement of the valve by said lift mode switching means increases in the low lift mode.