Patent ID: 6478000
Filing Date: 2002-11-12
Classification: F01L

Abstract:
An internal combustion engine valve timing control apparatus comprising:a variable valve timing mechanism that varies a relative rotation phase of a camshaft with respect to a crankshaft of an internal combustion engine based on a fluid pressure in a timing advance-side hydraulic chamber and a fluid pressure in a timing retard-side hydraulic chamber with respect to at least a timing retarded side; a stopper that fixes the relative rotation phase of the camshaft at a predetermined advanced state that is between a most advanced state and a most retarded state and that is advanced from the most retarded state by a predetermined amount; a fluid pressure adjustor that adjusts the fluid pressure in the timing advance-side hydraulic chamber and the fluid pressure in the timing retard-side hydraulic chamber; and a controller that controls the fluid pressure adjustor so that the relative rotation phase of the camshaft becomes a state that is on an advanced side of the predetermined advanced state during a course of stopping the internal combustion engine, and then controls the fluid pressure adjustor to hold the relative rotation phase of the camshaft.