Measuring the Abrasiveness of Carbonaceous Deposits

The use of some Class B fuels in small‐bore high‐speed engines is accompanied by rapid wear of the piston, piston rings, and cylinder liner. This wear has been attributed in the past to corrosive properties of the sulphur contained in the fuel, but investigations at the laboratory of the British Internal Combustion Engine Research Association, at Slough, have indicated that the abrasive property of the carbonaceous deposits from the burnt fuel is a major factor in the problem.