No more shaking on start-up of the vehicle, no revving of the engine or monotonous humming during a long freeway drive. Noise and vibration that drivers currently regard as perfectly normal are suddenly a thing of the past in an electric vehicle but previously unheard noises and vibrations become prominent. At the same time, an electric motor creates vibrations in a completely different frequency range that is more unpleasant for the passengers. Whereas a combustion engine produces vibrations mainly between 20 and 400 Hz, an electric engine can produce vibrations of over 10,000 Hz.
“This creates new challenges in the development of electric vehicles, as comfort demands and expectations will increase further. We support OEMs in identifying and solving these new challenges to secure a comfortable and safe ride, no matter what drives the vehicle,“ says Frank Mueller, CEO of the Vibracoustic AG.
The company’s portfolio of innovative NVH solutions includes e.g. specially developed motor mounts and dampers. These are tuned to address and dampen the high frequency excitations of the electric motor in order to minimize the impact on the passengers. On the chassis side, highly robust chassis mounts address the additional weight and therewith higher loads on the chassis of electric vehicles.
Air springs not only increase driving comfort and driving dynamics, but they also allow to lower the car at high speeds to improve the aerodynamics and thus increase range. Furthermore, this technology can optimize the airflow under the car for better passive battery cooling. When parking, the air springs can also automatically heighten the car to allow enough space between the potential dry surface and the battery packs for safety reasons.