Surface-specific flow factors for prediction of friction of crosshatched surfaces
journal contributionposted on 2016-04-07, 13:37 authored by Michael Leighton, Ramin RahmaniRamin Rahmani, Homer Rahnejat
The paper presents a combined numerical and experimental study of generated sliding friction at low sliding speeds and high load intensity, typical of the top compression ring–cylinder liner conjunction at top dead centre in the compression stroke of high performance race engines. Frictional losses in the transition from compression to power stroke represent a significant portion of cyclic cylinder losses. The cylinder liner is cross-hatch honed with non-Gaussian topography, including larger groove features and a fairly smooth plateau roughness. Surface-specific flow factors are derived to closely represent the actual real rough conjunction. The predictions closely agree with the representative reported precision tribometric study of measured friction.
The authors wish to express their gratitude to the Engineering and Physical Sciences Research Council for the financial support of Encyclopaedic Program Grant: www.encyclopaedic.org, under which this research was carried out. The authors also would like to acknowledge the technical support of industrial partners of Encyclopaedic, particularly Capricorn Automotive Ltd (manufacturers of advanced cylinder liner technology) and Castrol the suppliers of lubricant.
- Mechanical, Electrical and Manufacturing Engineering