关键词: 清洁度标准；清洁度检测；清洁度过程控制；清洁度失效

Abstract: The component cleanliness is an indicator used to express the cleanliness level of component, which is the limited value of pollutants remaining on a certain surface of components or products after cleanliness, involving the type, size, quantity and weight of particles. Compared with manual transmission, automatic transmission has more stringent cleanliness requirement, so the cleanliness of the in-depth study of automatic transmission research and development process and quality management process is very important. The paper summarizes the cleanliness of foreign mainstream transmission manufactures. Aim at the cleanliness of automatic transmission, from four dimensions to introduce, include the cleanliness standard, cleanliness inspection, process control and failure effection. The paper provides a reference for the cleanliness control of China transmission manufactures.

Key words: Cleanliness standard; Cleanliness inspection; Cleanliness process control; Cleanliness failure