A reference angle detecting device includes a control shaft (60) that is connected to a controlled object (e.g., to a variable valve actuation mechanism of an engine E) and an electric motor (73) that causes the control shaft (60) to rotate via a worm gear...

There is provided a system for controlling an intake valve (53) of an internal combustion engine, including a variable valve mechanism (10) having a control shaft (12) to continuously vary a valve lift amount of the intake valve according to a rotational a...

An intake valve control apparatus for an internal combustion engine includes a first variable valve operating mechanism (5) capable of varying an operation angle of an intake valve (3) continuously, a second variable valve operating mechanism (6) capable o...

In a variable valve event and lift mechanism that rotates a control shaft (16) by a motor to successively vary a valve event and a valve lift amount of engine valves (12), a VEL control unit integrally provided with an angle sensor (104) that detects a rot...