The first chapter from a new book by Dr. Hermann J. Stadtfeld provides an overview of the need for new technologies and approaches when it comes to developing transmissions for electric vehicles.
Noise issues from gear and motor excitation whine are commonly faced by
many within the EV and HEV industry. In this paper the authors present an advanced CAE methodology for troubleshooting and optimizing such NVH phenomenon.
Electrification has already started to have a noticeable impact on the global automotive industry. As a result, the drivetrains of hybrid (HEV) and full electric vehicles (EV) are facing many challenges, like increased requirements for NVH in high speed e-Drives and the need for performance improvements to deal with recuperation requirements. Motivated by the positive validation results of surface densified manual transmission gears which are also applicable for dedicated hybrid transmissions (DHTs) like
e-DCTs, GKN engineers have been looking for a more challenging application
for PM gears within those areas.
The purpose of this paper was to verify, when using an oil debris sensor, that accumulated mass predicts gear pitting damage and to identify a method to set threshold limits for damaged gears.