VALVE GEAR

摘要

There is provided a valve gear (11A, 11B) of an internal combustion engine converting a rotational motion of a motor (12) into a linear motion by a cam (21), and driving an intake valve (2) or an exhaust valve (3) of a cylinder (1) so as to be opened and closed based on the linear motion, a motor control apparatus (30) which can actuate the motor (12) in a rocking drive mode in which a rotating direction of the cam (21) is changed during a lift of the valve (2, 3). The motor control apparatus (30) controls a motion of the motor (12) such that the cam (21) starts rotating before the valve (2, 3) starts lifting in the rocking drive mode.