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Several parts are integrated to keep out noise coming
from the door panel
TG is working on technological themes to improve sound insulation.
As quietness is especially important for a luxurious car, it was an
urgent task for us to deal with to find a measure to prevent noise
around the door from coming into the car. Since a glass run and a
glass inner weatherstrip were separately assembled before, there was
a little gap between them. Noise generated in a door panel gets into
the car from the gap. We have succeeded in significantly improving
noise insulation by integrating them in die forming.
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Integration of an inner weatherstrip and
a glass run decreases noise by three dB at the maximum compared to
the case of old products. |
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 Noise
insulation has been significantly improved by fully utilizing CAE
analysis.
In a development process, a die forming part, which is the most difficult
problem to solve, was closely examined in a three-dimensional form
using CAE analysis to perfect an ability to seal glass. We also solved
the problem of a parting line, which contradicts a sealing ability.
In particular, sound analysis was our biggest emphasis. A prototype
manufactured based on CAE analysis showed remarkably greater noise
insulation than an old product. Furthermore it should be noted that
noise was observed three dB less at a frequency of around four kHz
in a high speed running test. The new product has been then adopted
to the third generation Celsior. TG will provide a product with improved
noise insulation ability to mid-sized or compact sized cars based
on this technological advantage. |
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