Browse Publications Technical Papers 2005-01-2489
2005-05-16

Achieving Diesel Vehicle Appeal Part 2: Powertrain NVH Perspective 2005-01-2489

Diesel vehicle sales in the European passenger car market are rapidly approaching 50% market share. This rise in penetration has been achieved because buyers are attracted by the fuel consumption benefits of diesel powertrains and are now able to select from a wide range of desirable products with excellent performance and levels of refinement competitive with gasoline powered products. In a highly competitive marketplace there is increasing emphasis on the development of appealing diesel products, with the dominant factor being powertrain NVH performance.
This paper compliments an earlier paper [1] on the vehicle NVH process required to achieve high ‘diesel appeal’ by providing a more detailed powertrain NVH perspective. It focuses upon:
  • Key powertrain NVH issues
  • NVH target setting at a powertrain level
  • Combustion system design & calibration optimization
  • Powertrain structural optimization
Case studies are drawn from a range of relevant powertrain NVH projects to illustrate the application of key supporting tools and technologies:
  • Combustion noise analysis including noise source identification, characterization and monitoring using a novel analyzer system
  • Combustion noise optimization using a design of experiment approach
  • Optimization using structural attenuation prediction
The paper concludes with an insight into the future challenges in diesel powertrain NVH development that will be generated by increasingly stringent emissions requirements and a marketplace which will demand continuously improving levels of ‘diesel appeal’.

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