Patent ID: 7568456

Claim:
A valve gear of an internal combustion engine driven by an electric motor, the valve gear comprising: electric motor control means being capable of actuating the electric motor in a rocking drive mode in which a rotating direction of a cam is changed during a lift of a valve of a cylinder, the valve being driven to be opened and closed based on a linear motion, wherein, a rotational motion of the electric motor is converted into the linear motion, which drives the valve to be opened and closed, by the cam, the electric motor control means including a rocking control means for controlling a motion of the electric motor such that the cam starts rotating before the valve starts lifting in the rocking drive mode, and wherein the rocking control means controls the rotating speed of the cam in the rocking drive mode such that a target working angle of the valve is realized and a target of a time area obtained by integrating a lift amount of the valve is realized.