For the investigation of piston ring and cylinder liner systems, screening tests are usually run with pure engine oil as the only lubricant. Due to the fact that the combustion chamber of a cylinder is filled with a high-pressure gas-fuel-mixture, we assume that the piston ring and cylinder liner contact is lubricated by a mixture of oil and fuel rather than by pure oil. As numerous investigations already deal with the effect of oil on the piston ring and cylinder liner system, we will concentrate in this paper on the effect of diesel, especially the effect of the admixture of bio-diesel, on the wear behavior of such a system.

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