Examination of lubricant oil components affecting the formation of combustion chamber deposit in a two stroke cycle engine

摘要

In this study influence of fuel and lubricant oil ingredient on the combustion chamber deposit (CCD) formation is investigated using both a two-stroke cycle engine and an autoc1ave. The results obtained are: The influence of lubricant oil on CCD formation is greater than that of fuel and most of CCD is formed from the detergent dispersant added to the lubricant oil. Especially, the metallic detergent forms a larger amount of CCD than the ashless dispersant. The influence of deposit formation under the low-pressure condition appear on CCD accumulation at the engine greater than that of deposit formation under the high-pressure condition.