Engine valve actuation
AssigneeJaguar Land Rover Limited
InventorsRoger Stone, Richard Tyrrell, David Kelly
Life of this patent
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Abstract
An electromagnetic valve actuator and method of control thereof. The electromagnetic valve actuator is for at least one valve of an internal combustion engine, the electromagnetic valve actuator comprising: a rotor; a stator for rotating the rotor; output means for actuating the valve in dependence on rotation of the rotor; mechanical energy storage means arranged to store energy in dependence on rotation of the rotor and release the energy to assist rotation of the rotor and phase varying means for varying a phase between the mechanical energy storage means and the output means.
Claims20
An electromagnetic valve actuator for at least one valve of an internal combustion engine, the electromagnetic valve actuator comprising:
- a rotor;
- a stator configured to rotate the rotor;
- an output means arranged on the rotor, the output means configured to actuate the at least one valve based on rotation of the rotor;
- and
- a mechanical energy storage means arranged to alternately store and release energy based on the rotation of the rotor so as to assist the stator in rotating the rotor when the energy is released,
- wherein the mechanical energy storage means includes a cam with an asymmetric profile.
Dependencies are inferred from the claim text.