Analysis of Ticking Noise from Cam Bearing of a Diesel Engine

Analysis of Ticking Noise from Cam Bearing of a Diesel Engine

Improving idle sound quality as well as reducing idle noise level is increasingly demanded for diesel engines. Therefore, unusual noise occurrence at idle is a serious problem, and the noise must be removed. This paper describes the characteristics and mechanism of ticking noise that is unusual nois...

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Veröffentlicht in:SAE International journal of engines 2012-09, Vol.5 (4), p.1571-1580, Article 2012-01-1625
Hauptverfasser: Kimura, Jouji, Kasai, Ayumi, Saitoh, Shuji, Yamamoto, Atsushi, Takeshige, Naoya
Format: Artikel
Sprache:eng
Schlagworte:
Acoustic noise
Cavitation flow
Engine noise
Engines
Film thickness
Noise measurement
Noise temperature
Speed
Velocity
Vibration
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Zusammenfassung:Improving idle sound quality as well as reducing idle noise level is increasingly demanded for diesel engines. Therefore, unusual noise occurrence at idle is a serious problem, and the noise must be removed. This paper describes the characteristics and mechanism of ticking noise that is unusual noise radiated from the journal bearing of the camshaft at low idle speeds, based on the mechanism of cavitation in oil film existing between the journal and bearing.
ISSN:1946-3936
1946-3944
1946-3944
DOI:10.4271/2012-01-1625