Model of piston secondary motion and elastohydrodynamic skirt lubrication

Dursunkaya, Zafer
Keribar, Rifat
Ganapathy, Venkatesh
A model of elastohydrodynamic lubrication of reciprocating engine piston skirts was developed in the context of a simulation of piston secondary motions. The piston secondary dynamics, skirt lubrication and skirt elastic deformation problems are simultaneously solved in the calculation. The model can represent both conventional and two-piece articulated pistons and also includes a treatment of wrist pin lubrication. Skirt deformations are calculated using a skirt compliance matrix derived from a finite element model of the piston. The model exercised to calculate piston secondary motions and skirt deformations for a heavy-duty truck diesel piston at various operating conditions. Results show that peak skirt radial deformations can exceed the skirt-liner radial clearance and depend strongly on load. Articulated piston skirt deformations were shown to be significantly larger than those in conventional piston skirts.
Citation Formats
Z. Dursunkaya, R. Keribar, and V. Ganapathy, “Model of piston secondary motion and elastohydrodynamic skirt lubrication,” 1993, Accessed: 00, 2021. [Online]. Available: