Patent ID: 6155219
Filing Date: 2000-12-05
Classification: F01L,Y10T

Abstract:
A valve timing adjusting apparatus for internal combustion engine comprising:a camshaft for opening and closing at least one of an intake valve and an exhaust valve in an internal combustion engine,a casing which is rotatably mounted around said camshaft, and rotates in accordance with the movement of a crank shaft of the internal combustion engine,a rotor which is connected to said camshaft and accommodated in said casing, and is capable of rotating coaxially with and relatively to said casing, anda bias means for generating an urging force between said rotor and said casing,wherein said valve timing adjusting apparatus is arranged in such a manner that the urging force is set to the level equal to or below the average inertia torque of said camshaft within the period until the spark ignition occurs after one rotation of the crank shaft at the starting time of the combustion engine.