Title: Axial vibration of high-speed automotive engine crankshaft

Authors: G.Q. Shu, X.Y. Liang, X.C. Lu

Addresses: State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, PR China. ' State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300072, PR China. ' School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai, 200240, PR China

Abstract: The properties and calculation methods of axial vibration of high-speed automotive engine crankshafts are studied in this paper. First, the two main excitations that induce axial vibrations are analysed. Then a simplified model and the calculation method and analytical procedures are deduced by the application to the crankshaft of an online six-cylinder diesel engine. At last the axial vibration is measured at the front end of the crankshaft using a newly designed torsional/axial/bending 3-D vibration-testing device to verify the modelling and the results of the theoretical calculations. It was observed that the analytical results were very close to the actual measurements.

Keywords: automotive engines; axial vibration; coupled vibration; high speed crankshafts; vehicle design; diesel engines; vibration testing; modelling.

DOI: 10.1504/IJVD.2007.014919

International Journal of Vehicle Design, 2007 Vol.45 No.4, pp.542 - 554

Published online: 17 Aug 2007 *

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