Patent ID: 7984701

Claim:
A device for controlling the movement of an intake valve of an internal combustion engine, comprising a stem configured to move in translation through an opening of a hollow guide body and which ends in a mushroom head cooperating in operation with a valve seat provided in a wall of the engine head, wherein the valve is configured to move in translation with respect to the hollow guide body between a retracted position and a forward position in which the mushroom head respectively closes and opens the associated valve seat, the control device comprising: an electromagnet having a single polar expansion defining a first end-of-strike position for the valve, corresponding to said retracted closed position; the electromagnet being configured, when energised, to retain the valve in the retracted closed position, first resilient means associated with the valve and tending to urge it from the retracted position towards the forward, open position, and second resilient means also associated with the valve and tending to oppose its transition into the open position, said first and second resilient means being arranged to cause, while the electromagnet is de-energized for a predetermined period of time, a continuous oscillating displacement of the valve away from the retracted, closed position and back towards said retracted, closed position, passing through a second end-of-stroke position.