In recent years, with the continuous improvement of the degree of intensification of diesel engines for heavy-duty, high-power commercial vehicles and increasingly stringent emission standards, the requirements for diesel engines and their oils have become higher and higher. For this reason, for the requirements of Euro 3 and Euro 4 emission standards, German high-power diesel engine manufacturer MAN has jointly developed an internal evaluation test method with APL and ISP, which is worthy of reference for China's diesel engine and lubricant industry. This article describes in detail the development of this test method, test procedures, evaluation, tolerances and test specifications, as well as an objective statistical method used to determine the limit value.
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