Determination of Dynamic Properties of Rubber-Metal Motor Mount of Electric Powertrain

Abstract

Increasing the volume of the production of vehicles with electric or hybrid powertrain also leads to specific activities for research and development in this segment. One of the current areas that present the paper deals with the idea of reducing structure-borne vibration from electric powertrain to the vehicle interior. Electric powertrain and mainly electric motor are a source of high-frequency vibration up to 3000 Hz. On the other side, the internal combustion engine is a source of significantly lower frequencies. For this reason, a different approach is needed when designing electric powertrain mounts. To reduce the vibration transfer to the structures of the vehicle, rubber-metal motor mounts are used. Rubber-metal motor mount must have specific dynamic properties such as the dynamic stiffness, the loss angle and hysteresis properties. Hysteresis properties are important to define the damping properties of the rubber-metal motor mount. The Bouc-Wen model was used for modeling of hysteresis properties. The results from simulations are compared with experimental data.