Noise, Vibration and Harshness (NVH) has become an increasingly important attribute invehicle engineering. At idle conditions, customer perceived NVH is dominated bypowertrain NVH. Powertrain NVH can be radiated engine noise or noise (and vibration)transmitted through the powertrain mounting system. This paper discusses the variability inthe later NVH as a function of the variability of the mount stiffness parameters. A simple 6degrees of freedom model is used in the analysis. Detailed design of experiment studies wereconducted. It is concluded that better control of mount stiffness parameters would result inimproved prediction and performance of idle NVH.
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