The Analysis of Lubrication for HPD Diesel Engine Piston Pin Bearing

Abstract:

Based on the unified Reynolds equation model and fast Fourier transform (FFT) method, the lubrication performance of the piston pin bearing for high power density diesel engine was studied by numerical simulation. First of all, through the coupled solving of a unified Reynolds equation and elastic deformation equation, the orbit of journal center for piston pin bearing is investigated. The eccentricity ratio of the piston pin bearing in vertical direction of the piston stroke is smaller, however it is much larger in the downward direction of the piston stroke, which indicate that the below area of the piston pin bearing bears greater load and occurs larger deformation. This is consistent with the reality that the below area of the piston pin bearing is prone to damage and wear. Secondly, the influence of the different bearing clearances and width on the minimum oil film thickness is discussed, The results show that the minimum oil film thickness is increased, while the width of piston pin bearing is increased or the clearance of piston pin bearing is decreased.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 3214-3218
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.3214
• Online since: July 2012
• Authors: Jun Yan Zhang, Shu Kui Han
• Keywords: Contact Lubrication, Elastic Deformation, Fast Fourier Transform (FFT), Piston Pin Bearing

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