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Downsized actuator

The result is a downsized actuator compared to state of the art electromechanical actuator, considered as reference. Iterative simulation work was performed to establish the best compromise for the definition of the spring mass oscillator system. This iterative process starts with valve lightweight design, which is then exploited to reduce spring rate and subsequently to reduce the mass of the actuator contributors to the mobile mass. Following magnetic design, mechanical design was performed, generating the full set of drawings. Corresponding prototype actuators were manufactured both for bench level evaluation and engine level validation.

Performance of this actuator were validated by detailed experimental studies with the precise assessment of static force but also dynamic performance including transition time and electrical power consumption. The benefits of this downsized actuator for intake application are the following: compatibility with 34 mm valve pitch engines, 28% volume reduction, 25% mass reduction and up to 40% electrical power consumption reduction for equivalent transition times.

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Research Department
18,chaussée Jules César - BP 340 OSNY