Parameterization and FEA Approach for the Assessment of Piston Characteristics

Document Number: 2006-01-0429

Date Published: April 2006

Author(s):
Andreas P. Panayi - Michigan State Univ.
Harold J. Schock - Michigan State Univ.
Boon-Keat Chui - Mid Michigan Research, LLC
Mikhail A. Ejakov - Ford Motor Co.

Abstract:
Elastohydrodynamic lubrication, piston dynamics and friction are important characteristics determining the performance and efficiency of an internal combustion engine. This paper presents a finite element analysis on a production piston of a gasoline engine performed using commercial software, the COSMOSDesignStar, and a comprehensive cylinder-kit simulation software, the CASE, to demonstrate the advantages of using a reduced, parameterized model analysis in the assessment of piston design characteristics. The full piston model is parameterized according to the CASE specifications. The two are analyzed and compared in the COSMOSDesignStar, considering thermal and mechanical loads. The region of interest is the skirt area on the thrust and anti-thrust sides of the piston. The results are compared with the CASE results and a discussion follows on how the piston model simplification approach can help significantly reduce computation time without losing valuable information on piston performance. The piston characteristics are evaluated with the reduced model thus allowing for a faster analysis and optimization than would be possible with a complete FEA piston model. The results demonstrate that the simplified model agrees qualitatively and quantitatively with the full model; the maximum temperature and calculated distortions on the skirt face are comparable. Computation time difference between the full model and simplified model is not significant for a single analysis; however, it becomes very significant when a cyclical analysis is performed at every crank angle degree.

File Size: 1300K
Product Status: In Stock

Included in: SP-2013

See other papers presented at SAE 2006 World Congress & Exhibition, April 2006, Detroit, MI, USA, Session: CI and SI Power Cylinder Systems: Piston, Pins and Liners (Part 1 of 2)

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