Patent ID: 8607752

Claim:
A valve timing control apparatus applied to an internal combustion engine, in which a camshaft opens and closes a drive gear by torque transmission from a crankshaft, the valve timing control apparatus controlling valve timing of the drive gear with hydraulic fluid supplied from a supply source in accordance with rotation of the internal combustion engine, the valve timing control apparatus comprising: a housing; a vane rotor having vanes to define an advance chamber and a retard chamber arranged in a rotational direction in an interior space of the housing, the vane rotor changing a rotational phase to an advance side or a retard side with respect to the housing by introduction of hydraulic fluid to the advance chamber or the retard chamber; a main regulation member reciprocally and movably received in one of the vane rotor and the housing, the main regulation member moving in an insertion direction to be inserted into a recess part formed at the other one of the vane rotor and the housing to regulate the rotational phase at a regulation phase between a full advance phase and a full retard phase, the main regulation member moving in an escape direction to escape out of the recess part to release the rotational phase from regulation; a main resilient member that urges the main regulation member in the insertion direction, the main resilient member inserting the main regulation member into the recess part when the main resilient member urges the main regulation member at the regulation phase, the main resilient member bringing the main regulation member into contact with a different part of the other one, which different part is different from the recess part, when the main resilient member urges the main regulation member at the rotational phase different from the regulation phase; a sub regulation member reciprocally movably received in the one of the vane rotor and the housing, the sub regulation member being also movable in the directions, in which the main regulation member is movable, the sub regulation member having: a pressure reception part to receive pressure, which is applied in the escape direction from hydraulic fluid introduced to an operation chamber formed in the one of the vane rotor and the housing; and an engagement part engageable with the main regulation member in the escape direction and disengageable from the main regulation member in the insertion direction; and a sub resilient member that urges the sub regulation member in the insertion direction.