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Powertrain-related vehicle sound development
Technical Paper
2000-05-0301
Sector:
Language:
English
Abstract
This paper reflects an efficient and comprehensive approach for
vehicle sound optimization integrated into the entire development
process. It shows the benefits of early consideration of typical
vehicle NVH features and of intensive interaction of P/T and
vehicle responsibilities.
The process presented here considers the typical restriction
that acoustically representative prototypes of engines and vehicles
are not available simultaneously at the early development phase.
For process optimization at this stage, a method for vehicle
interior noise estimation is developed, which bases on measurements
from the P/T test bench only, while the vehicle transfer behavior
for airborne and structure-borne noise is assumed to be similar to
a favorable existing vehicle. This method enables to start with the
pre- optimization of the pure P/T and its components by focusing on
such approaches which are mainly relevant for the vehicle interior
noise.
After installation of the pre-optimized P/T into the vehicle
prototype, the actual interior sound is benchmarked followed by a
sound cleaning process to start with the elimination of obviously
disturbing sound shares. The sound improvement is then performed on
this pre-optimized vehicle concentrating on realistic hardware
potential elaborated. Improvement measures are realized in hardware
and finally verified with respect to their impact on the interior
sound quality.