GB/T 3821-2015 《Small and medium power internal combustion engines—Cleanliness limits and measurements》 Related products

This standard specifies the limits, measurement items, parts and conditions and methods of cleanliness of small and medium power internal combustion engines (hereinafter referred to as internal combustion engines). Cleanliness testing of the whole engine and its parts applicable to internal combustion engines. The standard introduces the calculation method of the weight limit value of cleanliness, specifies the cleanliness limit value expressed in the miscellaneous mass (W) of each internal combustion engine, and provides the calculation formula of the empirical constant and the correction factor. It specifically includes the application of parameters such as total displacement correction factor, Rotation speed correction factor and compensation amount to ensure that the cleanliness of the internal combustion engine in use meets the requirements. These provisions are designed to improve the working performance and Reliability of the internal combustion engine and reduce the potential impact on the internal combustion engine due to pollutants.