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3.活塞环的鉴别①日本活塞环的专业生产厂主要是下列三家:日本活塞环公司,代号为NPR;理研公司,代号为RIK;帝国活塞环公司,代号为TP. ②零件的外观检查: 1)虽然每种型号发动机的活塞环结构不一定相同,但其第一道气环的外侧(外圆)表面上必然镀以硬铬,以改善其耐磨性.柴油机刮油环的外圆表面上,大多也镀硬铬.有些发动机的第二、三道气环外圆表面上也镀硬铬.凡镀铬表面,其光结度
3. Piston ring identification ① Japanese piston ring specializing in the production plant is mainly the following three: Japan’s piston ring company, code-named NPR; Riken company, codenamed RIK; Imperial piston ring company, code-named TP. ② parts of the appearance of the inspection: 1) Although the piston rings of each engine model are not necessarily the same, hard chrome plating must be applied on the outer (outer) surface of the first gas ring to improve its wear resistance. On the surface, most of the hard chrome plated some of the engine’s second and third gas ring cylindrical hard chrome plating on the surface where the chrome