✦ LIBER ✦

Pseudo cylinder pressure excitation for analyzing the noise characteristics of the engine structure

✍ Scribed by Hisashi Ozawa; Teruo Nakada

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 337 KB
Volume: 20
Category: Article
ISSN: 0389-4304
DOI: 10.1016/s0389-4304(98)00046-0

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✦ Synopsis

A new in-cylinder excitation system has been developed to analyze the engine structure attenuation experimentally. A hydraulic and a piezoelectric actuator are used to exactly reproduce the cylinder pressure in non-running engine conditions. The structure attenuation measured in this system has a good coincidence with that measured in actual engine operating conditions, however the conventional excitation method, which applied only high-frequency components as the excitation pressure, resulted in poor agreement. As a result, the proposed system has been proved to be very useful and effective to estimate the engine noise characteristics without engine running.

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