Whirl of Crankshaft Rear End, Part 2: an L4-Cylinder Diesel Engine

Paper #:
  • 2017-01-1811

Published:
  • 2017-06-05
DOI:
  • 10.4271/2017-01-1811
Citation:
Kimura, J., Tanaka, T., Hakomoto, K., Kawase, K. et al., "Whirl of Crankshaft Rear End, Part 2: an L4-Cylinder Diesel Engine," SAE Int. J. Engines 10(4):2099-2108, 2017.
Pages:
10
Abstract:
Since the sizes of the flywheel and clutch have been enlarged due to downsizing of diesel engines, the mass and moment of inertia at the crankshaft rear end have increased. Consequently, the serious bending stresses have appeared in the crankshaft rear. This paper describes the characteristics of those serious bending stresses, based on the mechanism for whirl resonance. The whirl resonance is largely impacted by the mass of the flywheel and clutch and by the distance from the crank-journal center of the rear end to the center of gravity of the flywheel and clutch.
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