Patent ID: 8631774

Claim:
A valve timing control apparatus comprising: a driving-side rotary member rotatable in synchronism with a crankshaft of an internal combustion engine; a driven-side rotary member disposed coaxial with the driving-side rotary member and rotatable in synchronism with a valve opening/closing cam shaft of the internal combustion engine; a fluid pressure chamber formed by the driving-side rotary member and the driven-side rotary member; a partitioning portion provided in at least one of the driving-side rotary member and the driven-side rotary member for partitioning the fluid pressure chamber into an advance angle chamber and a retard angle chamber; a restricting member provided in at least one of the driving-side rotary member and the driven-side rotary member and projectable and retractable relative to the other of the driving-side rotary member and the driven-side rotary member; a restricting recess formed in the other rotary member and restricting a relative rotational phase of the driven-side rotary member relative to the driving-side rotary member to a range from one of a most advanced angle phase and a most retarded angle phase to a predetermined phase in association with projection of the restricting member therein; a locking member disposed in the one rotary member having the restricting member, the locking member being projectable and retractable relative to the other rotary member; a locking recess formed in the other rotary member and locking the relative rotational phase of the driven-side rotary member relative to the driving-side rotary member to the predetermined phase in association with projection of the locking member therein; a communication passage formed between the restricting member and the locking member; and an urging passage for feeding fluid for projecting the restricting member into the restricting recess; wherein the valve timing control apparatus is switchable into a first state for releasing the locking by the locking member and the restriction by the restricting member with feeding of the fluid into the communication passage, a second state for restricting the restricting member and releasing the locking by the locking member with non-feeding of the fluid to the communication passage and feeding of the fluid to the urging passage and a third state for restricting the restricting member and locking the locking member with feeding of the fluid neither to the communication passage nor to the urging passage.