Sturesson, P., Svensson, C., Weckner, J., Karlsson, R. et al., "N&V Integration and Optimization of Driveline Using Transfer Path Analysis," SAE Technical Paper 2012-01-1531, 2012, doi:10.4271/2012-01-1531.
The automotive manufacturers today have to put more products faster to the market using shorter vehicle development time and also face significant challenges in vehicle design optimisation due to trade-offs mainly caused by increased focus on fuel economy and CO2 reduction. The market expectation on vehicle acoustics refinement is also increasing and plays a significant role in terms of product perception. With extensive introduction of enablers for improved fuel economy, like automated combustion engine stop/start system as well as down speeding/sizing and more aggressive shift maps for automatic transmissions, additional requirements and development tasks are needed for the noise and vibration (N&V) integration of a driveline. The scope of this paper describes the application of transfer path analysis techniques for low frequency driveline excitation at different low engine speed driving conditions focusing on engine start-up/shut-down events. Assessments of advantages and disadvantages as well as subsystem target allocation synthesis are performed. The data and analysis quality and the effectiveness of achieving the customer expected noise & vibration performance, i.e. the remedy selection, depends heavily of methods applied.