A MODEL OF PISTON SECONDARY MOTION AND ELASTOHYDRODYNAMIC SKIRT LUBRICATION

Date

1994-10-01

Author

Dursunkaya, Zafer
GANAPATHY, V

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

343
views

0
downloads

A model of elastohydrodynamic lubrication of piston skirts in reciprocating engines 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 wristpin lubrication. Skirt deformations are calculated using a skirt compliance matrix derived from a finite element model of the piston. The model was exercised by calculating 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 strongly depend on load. Articulated piston skirt deformations were shown to be significantly larger than those in conventional piston skirts. Consideration of skirt elastic deformations significantly affected (rigid piston) motion and skirt friction predictions, highlighting the importance of an elastohydrodynamic model.

Subject Keywords

Mechanical Engineering, Mechanics of Materials, Surfaces, Coatings and Films, Surfaces and Interfaces

URI

https://hdl.handle.net/11511/52293

Journal

JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME

DOI

https://doi.org/10.1115/1.2927332

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Effect of variable friction coefficient on sheet metal drawing Darendeliler, Haluk; Yucesoy, CA (Elsevier BV, 2002-02-01) A variable friction model that relates the parameters of sheet metal drawing to the local lubrication conditions taking place during the deformation, has been integrated to a finite element program. Variable friction coefficients for the contacting surfaces are determined from the friction model, which uses the related parameters obtained at each time step of the finite element program as inputs. A number of numerical runs have been performed and the strains are compared with the experimental results for ci...
Model of piston secondary motion and elastohydrodynamic skirt lubrication Dursunkaya, Zafer; Ganapathy, Venkatesh (1993-01-01) 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 elem...
A Comprehensive Model of Piston Skirt Lubrication KERİBAR, Rıfat; Dursunkaya, Zafer (1992-01-01) This paper describes a comprehensive model of piston skirt lubrication, developed for use in conjunction with piston secondary dynamic analysis, to accurately characterize the effects of the skirt-cylinder oil film on piston motions. The model represents both hydrodynamic and boundary lubrication modes and applies an asperity contact pressure when surfaces are in close proximity with each other. In addition to skirt dimensions and surface roughness properties, the circumferential extent of lubrication, an a...
Effect of differential lubrication on the cup drawing of mild steel blanks Atala, H. (Elsevier BV, 1990-7) Cup-drawing test have been performed on mild steel blanks to study the frictional behaviour of the flanges in a cup-drawing operation, by utilizing differential lubrication. Molybdenum disulphide paste has been chosen as the lubricant because of its good performance in preliminary trials. The results suggest that lubrication of the flange is essential in the achievement of a fully drawn cup without failure and without wrinkles. It can also be stated that lubricant application to central regions appears to b...
A non-linear mathematical model for dynamic analysis of spur gears including shaft and bearing dynamics Özgüven, Hasan Nevzat (Elsevier BV, 1991-3) A six-degree-of-freedom non-linear semi-definite model with time varying mesh stiffness has been developed for the dynamic analysis of spur gears. The model includes a spur gear pair, two shafts, two inertias representing load and prime mover, and bearings. As the shaft and bearing dynamics have also been considered in the model, the effect of lateral-torsional vibration coupling on the dynamics of gears can be studied. In the non-linear model developed several factors such as time varying mesh stiffness an...

Citation Formats

Z. Dursunkaya and V. GANAPATHY, “A MODEL OF PISTON SECONDARY MOTION AND ELASTOHYDRODYNAMIC SKIRT LUBRICATION,” JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, pp. 777–785, 1994, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52293.