Technical Paper
Powertrain and Driveline Integration Using Transfer Path Analysis in the New Saab 9-5
2010-06-09
2010-01-1418
The competition in the automotive market enforces shorter vehicle development time in order to get products faster to the market. In addition the customer expectation on interior noise, vibration and harshness (NVH) refinement is increasing and has an important impact of the perception of the product. The focus on fuel economy and CO2 reduction leads also to significant challenges in the vehicle development, which may result in trade-offs for NVH performance. Today's direct injection turbo charged diesel and gasoline engines exhibit both high low-end torque, which gives the customer a pleasant drive quality and improved fuel economy. However, the NVH integration challenges become significant due to mainly structure borne noise transfer through both the driveline itself and the powertrain mounting systems. In addition, the impulsive noise due to the combustion process itself in especially diesel engines needs to be refined.