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Development of active engine mounts based on piezo actuators

: Kraus, Roman; Herold, Sven; Millitzer, Jonathan; Jungblut, Timo

ATZ worldwide 116 (2014), No.1, pp.50-55
ISSN: 2192-9076
Journal Article
Fraunhofer LBF ()
active engine mount; piezo actuator

In vehicles, engines cause vibrations that are transferred from the mounts and the adjacent structures to the interior where they typically result in unwanted sound emissions. Passive hydro mounts have asserted themselves as one response to dampening noise levels. However, current developments in the automotive industry such as three-cylinder engines and the use of cylinder deactivation are leading to an increase in vibration levels that passive systems can no longer compensate for. The implementation of active systems show more promise in improving vibration comfort and the acoustic impression. A systematic approach was taken to develop such a system at the Fraunhofer-Institute LBF and subsequently test it in a real vehicle.