数値シミュレーションを用いたピストンスラップ運動の研究

概要

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The piston slap impact noise has been investigated using a piston secondary motion simulation, which has been developed with paying attention both to the simple modeling and the accurate estimation of the piston slap impact, by considering the hydrodynamic effects of the piston skirt oil film and the friction forces at various contact points. The calculation results were compared with the actual piston motion measured by the link mechanism, and with the cylinder wall vibrations on behalf of the piston slap impact. Consequently, the calculation accuracy was confirmed to be sufficient to make the precise estimation of the piston slap noise.
1998-03-25