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Theoretical/Experimental Study on the Vibrations of a Car Engine

Journal Article
ISSN: 1946-3995, e-ISSN: 1946-4002
Published April 14, 2008 by SAE International in United States
Theoretical/Experimental Study on the Vibrations of a Car Engine
Citation: Muñoz, L., Gobbi, M., Mastinu, G., and Pennati, M., "Theoretical/Experimental Study on the Vibrations of a Car Engine," SAE Int. J. Passeng. Cars - Mech. Syst. 1(1):896-908, 2009,
Language: English


The influence of the inertia properties (mass, centre of gravity location, and inertia tensor) on the dynamic behaviour of the engine-gearbox system of a car is studied in this paper, devoting particular attention to drivability and comfort. The vibration amplitudes and the natural frequencies of the engine-gearbox system have been considered. Additionally, the loads transmitted to the car body have been taken into account. Both the experimental and the theoretical simulations confirmed that the engine-gearbox vibrations in the range 10 - 15 Hz are particularly sensitive to slight variation of the inertia properties. The effects on engine-gearbox vibrations due to half-axles, exhaust system, pipes and inner engine-gearbox fluids have been highlighted.