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Journal excitation force and power plant vibration at crankshaft resonance frequency
Published October 13, 1999 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
Recently, there has been continuous demand to minimize crankshaft journal and pin diameter to improve fuel economy. Up to now, many efforts have been made to compensate for increase noise and vibration. There are many studies to improve crankshaft and power plant vibration characteristics individually, but few examples to look into the relationship between crankshaft and power plant.
This paper addresses the way to minimize 200-500Hz vibration level about L4 1.5L gasoline engine. Key point is to improve the relationship between journal excitation force caused by crankshaft resonance and power plant resonance mode shape.