VALVE TIMING CONTROL APPARATUS

摘要

A valve timing control apparatus for use in an internal combustion engine having a crankshaft driven by the engine and a camshaft adapted to drive at least one valve. The control apparatus comprises a rotary member drivingly connected to the crankshaft for rotation with rotation of the crankshaft. A desired angular position of the camshaft with respect to the rotary member is calculated based upon engine operating conditions. The rotary member is coupled to the camshaft through a coupling mechanism which sets the camshaft at the desired angular position with respect to the rotary member. The coupling mechanism makes this angular position setting in response to torque changes in the camshaft.