Evaluation Study of Fuel Dilution on the Performance of Lubricating Oil
Turbocharged Direct-Injection Diesel Engines generally have fuel dilution on lubricating oils in different degrees,which directly affects the anti-wear,cleanliness and other performance of lubricating oils.The evaluation method of lubricating oil in China is equivalent to ASTM method for a long time,however,there is no engine bench evaluation test method for the dilution effect of lubricating oils.The laboratory developed a comprehensive evaluation method for lubricating oil performance under the condition of fuel dilution using small diesel engines of domestic brands,namely"Evaluation of comprehensive performance of diesel engine oils 2.0 CTI method".This method evaluates the anti-wear performance and high temperature cleaning performance of the lubricating oil by scoring the engine parts after the test.The results show that:after comparative experiments and verification tests,the 200h bench test evaluation method proposed in this paper has significant causticity,good repeatability and discrimination in the main evaluation items of engine exhaust camshaft wear,piston cleanliness evaluation and turbocharger deposits,and the test method meets the requirements of evaluating the impact of fuel dilution on the comprehensive performance of lubricating oil.The evaluation results can guide the development of lubricating oil formulation.
diesel enginelubricating oilfuel dilutionfriction performancestand test evaluation
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