Valve timing control apparatus

摘要

A valve timing control apparatus includes a driving-side rotary body, a driven-side rotary body, a fluid pressure chamber partitioned into a retard angle chamber and an advance angle chamber by a partitioning portion provided in at least one of the driving-side rotary body and the driven-side rotary body, a fluid control mechanism for controlling feeding of working fluid from a working fluid pump for feeding the working fluid to the fluid pressure chamber and controlling also discharging of the working fluid from the fluid pressure chamber, a first lock mechanism capable of restraining a relative rotational phase to a first predetermined phase between a most retarded angle phase and a most advanced angle phase, and a second lock mechanism capable of restraining the relative rotational phase to a second predetermined phase different from the first predetermined phase.

主权项

1. A valve timing control apparatus comprising:
a driving-side rotary body rotatable in synchronism with a crankshaft of an internal combustion engine; a driven-side rotary body mounted coaxial relative to the driving-side rotary body and rotatable in synchronism with a valve opening/closing camshaft of the internal combustion engine; a fluid pressure chamber formed by the driving-side rotary body and the driven-side rotary body and partitioned into a retard angle chamber and an advance angle chamber by a partitioning portion provided in at least one of the driving-side rotary body and the driven-side rotary body; a fluid control mechanism for controlling feeding of a working fluid from a working fluid pump for feeding the working fluid to the fluid pressure chamber and controlling also discharging of the working fluid from the fluid pressure chamber; a first lock mechanism configured to restrain a relative rotational phase of the driven-side rotary body relative to the driving-side rotary body to a first predetermined phase between a most retarded angle phase and a most advanced angle phase; and a second lock mechanism configured to restrain the relative rotational phase to a second predetermined phase different from the first predetermined phase, wherein, in the first predetermined phase and in the second predetermined phase, a relative rotational movement of the driven-side rotary body relative to the driving-side rotary body is prevented, regardless of a displacement force in an advance angle direction or a retard angle direction based on torque variations of the camshaft.