Patent ID: 9212571
Filing Date: 2015-12-15
Classification: F01L

Abstract:
1. A valve timing control apparatus which controls valve timing of a valve using a pressure of hydraulic fluid, the valve being opened and closed by a camshaft to which a torque is transmitted from a crankshaft in an internal combustion engine, the valve timing control apparatus comprising: a housing rotor rotating with the crankshaft; a vane rotor rotating with the camshaft, the vane rotor defining an advance chamber and a retard chamber in the housing rotor in a rotational direction, a rotation phase of the vane rotor relative to the housing rotor being controlled by a flow of the hydraulic fluid relative to the advance chamber and the retard chamber; a control valve which controls the flow of the hydraulic fluid relative to the advance chamber and the retard chamber; and a lock mechanism which locks the rotation phase at a stop time and a start time of the internal combustion engine, wherein the control valve has: the control valve includes a control component having a cylindrical shape which is able to move in an axial direction to control the flow of the hydraulic fluid relative to the advance chamber and the retard chamber, the check valve includes a check portion having a cylindrical shape coaxially disposed in the control component, the check portion has a pressure receive part and a communication inner hole, and the check portion moves in the axial direction to a valve-close position where the communication inner hole is closed at a position between the atmospheric port and the discharge port by receiving the negative pressure from the discharge chamber at the pressure receive part.