Patent ID: 6189497
Filing Date: 2001-02-20
Classification: F01L,F02D,Y02T

Abstract:
A method for variable valve lift in an internal combustion engine, comprising the steps of:a). providing at least one camshaft operatively engaging at least one valve train of the engine for effecting opening and closing of at least one intake valve and at least one exhaust valve;b). sensing an engine speed of the engine; and,c). adjusting a distance between an axis of the at least one camshaft and the at least one valve train as a function of the sensed engine speed, wherein opening of the intake valve is advanced with an increase in engine speed and opening of the exhaust valve is retarded with the increase in engine speed, and wherein a point of maximum lift of the intake valve is retarded with the increase in the engine speed and a point of maximum lift of the exhaust valve is advanced with the increase in engine speed.