It is well known that cylinder bore deformations during engine operation cause a number of problems in piston ring lubrication. Particularly, the deterioration of piston ring and cylinder bore conformability results in a significant increase in lubricating oil consumption. Therefore, measurement and identification of cylinder bore distortion has been an important subject for engine designers. In this study, an analytical lubricating oil consumption model was developed for a diesel engine. Piston stiffness was identified as an important input parameter for the oil consumption model, and the stiffness matrix of the piston was calculated using finite element simulations. In addition, finite element analysis was performed to determine the distorted cylinder block shape in engine running conditions. Pressure curves and loads obtained in actual engine tests were used in the analysis. The Fourier coefficients of a distorted cylinder bore was calculated which characterize the deformed bore orders. Using these Fourier coefficients, several distorted bore shapes were regenerated, including a straight bore and the effect of each order on total lube oil consumption was investigated by means of the oil consumption model.
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January 2014
Research-Article
The Effect of Cylinder Bore Distortion on Lube Oil Consumption and Blow-By
Ozgen Akalin
Ozgen Akalin
Mechanical Engineering Department,
Istanbul Technical University
,Gumussuyu
,Istanbul 34437
, Turkey
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Ozgen Akalin
Mechanical Engineering Department,
Istanbul Technical University
,Gumussuyu
,Istanbul 34437
, Turkey
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received July 7, 2012; final manuscript received July 10, 2013; published online October 3, 2013. Assoc. Editor: Robert L. Jackson.
J. Tribol. Jan 2014, 136(1): 011103 (9 pages)
Published Online: October 3, 2013
Article history
Received:
July 7, 2012
Revision Received:
July 10, 2013
Citation
Kagnici, F., and Akalin, O. (October 3, 2013). "The Effect of Cylinder Bore Distortion on Lube Oil Consumption and Blow-By." ASME. J. Tribol. January 2014; 136(1): 011103. https://doi.org/10.1115/1.4025208
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