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Analysis and Mechanism of Engine Intake Rumble Noise
Published October 17, 1990 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
This paper describes the investigation of intermitten rumble noise in the passenger compartment which is caused by intake noise. It has been reported elsewhere that the rumble is caused by a resonant bending vibration of the crankshaft. But we have newly found that the rumble is also caused by intake noise. The modal analysis of the air pressure in the engine inlet system revealed that the standing wave generated in the surge tank causes the rumble attributable to intake noise. Further we have investigated the effect of the surge tank shape on reducing the intake rumble by means of computer simulation and actual engine experiments.