Abstract
The paper presents a multi-body model of a 4-cylinder, 4-stroke diesel engine, incorporating component flexibility. The model also comprises engine firing order and experimentally measured combustion time history. The paper presents numerical predictions for conical motion of the flywheel due to combined torsion-deflection modes of the flexible crankshaft system. The half-engine order responses induce the complex 3-dimensional whirling motion of the flywheel, which is responsible for repetitive shock loading of the drivetrain system through impact with the clutch system. This leads to an assortment of noise and vibration concerns, one of which is the in-cycle vibration of the clutch system. Numerical prediction of this vibration response conforms well with the experimental findings, both of which are reported in this paper.
