Jaguar Land Rover Limited

Roger Stone

Richard Tyrrell

David Kelly

Owen Evans

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.

Engine valve actuation

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.

A desmodromic valve train () for an engine (), comprising a valve actuator () arranged to actuate a valve () independently of the crank angle of the engine (), wherein the desmodromic valve train () comprises: a load path arrangement comprising an input arranged to receive actuating force from the valve actuator (), an output arranged to provide the actuating force to the valve (), and mechanical advantage means arranged such that a first displacement, of the input, causes a second displacement, of the output, wherein the second displacement is a multiple of the first displacement, the multiple being within the range 1.3 to 1.95.

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Coventry, United Kingdom

Roger Stone