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Date of Publication:2012-01-01

Journal:内燃机学报

Volume:30

Issue:5

Page Number:796-801

ISSN No.:1000-0909

Abstract:A three-dimensional transient heat mixed lubrication and friction model
   of piston ring liner was developed by coupling three-dimensional
   transient heat conduction model,dynamic lubricant model and heat
   transfer model of lubrication film,and considering effect factors of
   alteration of lube oil viscosity temperature,oil film fracture position
   and axis-asymmetry of piston ring tension in the circumferential
   direction of liner.Comparative analysis on influence of structural
   parameters on lubrication performance of piston ring liner including
   solid components temperature field,axial height and tubbish height of
   piston ring were made using the model.Results show that film thickness
   gets its minimum value and friction force gets its maximum value under
   the crank angle of 365.3°CA.Minimum film thickness reduces by 31.7%
   using the temperature of piston ring and liner under bottom dead center
   of charging and top dead center of combustion.Minimum film thickness
   increases by 74.5% and maximum friction force decreases by 45.7% when
   axial height of piston ring increases from 2.00,mm to 4.00,mm.Minimum
   film thickness decreases by 46.5% and maximum friction force increases
   by 57.1% when tubbish height of piston ring increases from 2.5,mum to
   5.0,mum.

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