Intelligent Valve Actuation – A Radical New Electro-Magnetic Poppet Valve Arrangement

Authors

Roger Stone, David Kelly,
Camcon Auto Ltd., Cambridge, Foxton;
John Geddes, Sam Jenkinson,
Jaguar Land Rover Ltd., Gaydon, Warwick

Summary

Intelligent Valve Actuation (IVA) enables digital control of the last controllable combustion variable – gas exchange. Designed for 12 volt operation, IVA far exceeds the capability of all other variable valve systems and has been designed as a practical, cost effective solution in these days of CO₂ constraints. Development work
to date has used the state-of-the-art Jaguar Land Rover 2 litre, 4 cylinder, petrol engine already using a very advanced variable valve system. Inlet only IVA steady state fuel economy improvements of up to 7.5% have already been demonstrated.
Further work will yield significantly more. Throttle-less operation is inherent, transient response unprecedented and the opportunity for “smart” integration with other systems broad indeed.

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