Measurement and analysis of the interior noise and the transfer path of acoustic phenomena into the driver cabin of a battery electric vehicle

摘要

Driving comfort is an important factor for buying decisions. This is especially apparent in battery electric vehicles (BEV) where the acoustic quality is an elementary distinguishing feature, since the masking of an internal combustion engine (ICE) is no longer present. Despite the importance of the acoustic quality, there is a general lack of knowledge of how to measure and interpret the high frequency noise generated by an electric powertrain with respect to the NVH behavior influencing the passengers. In this contribution, the measurement results of the interior noise of a battery electric vehicle are analyzed. Specific methods for determining the torsional vibration of the powertrain as reference value are also presented. Furthermore, a method for measuring and interpreting the transfer path of acoustic phenomena from the drivetrain of a battery electric vehicle into the passenger cabin is presented. The measurements are performed in the context of the IPEK-X-in-the-Loop Framework on a roller test bench in a semi-anechoic chamber.