Patent ID: 6302071
Filing Date: 2001-10-16
Classification: F01L

Abstract:
An oil passage system of a valve moving control apparatus for an internal combustion engine, comprises:a hydraulic valve phase variable mechanism for altering phase of at least one of a suction valve and an exhaust valve provided in a cylinder head;a working oil supply passage communicating with a working oil supply source;a phase operating oil passage communicating with said working oil supply passage;an oil pressure control valve communicating with said phase operating oil passage for controlling pressure of a phase operating oil supplied from said working oil supply passage through said phase operating oil passage to produce a phase controlling oil; anda phase controlling oil passage between said oil pressure control valve and said valve phase variable mechanism for supplying said phase controlling oil to said valve phase variable mechanism to alter said phase in accordance with pressure of said phase controlling oil by said valve phase variable mechanism, whereinsaid phase operating oil passage has a reversing section where flow direction of the phase operating oil is altered in reverse.