Valve control device for use in internal combustion engine, has semi-hard plate of magnetic material having residual magnetization that is reversible in order to be removed during change of position of valve

摘要

The device has a semi-hard plate (26) of a magnetic material having residual magnetization, when a valve is in open or in closed position. The residual magnetization of the plate is reversible in order to be removed during the change of position of the valve. The material has coercive force between 10 and 600 Oersted. The magnetic material is chosen from aluminum-nickel-cobalt alloys with less coercive force. An independent claim is also included for an internal combustion engine including a valve control device.