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在镀硬铬活塞环外园表面加聚四氟乙烯复盖层(简称四氟铬环)或二硫化钼复盖层(简称二硫化钼铬环)是改善铬环初期磨合性的手段之一。为了证实复盖层的有效性,先后在湖北孝感柴油机厂和上海内燃机厂分别对90环和95环进行了台架试验。
In hard chrome plated piston ring outside the park surface with polytetrafluoroethylene cover (referred to as tetrafluorocarbon ring) or molybdenum disulfide coating (molybdenum disulfide ring) is to improve the initial chrome ring one of the means . In order to verify the effectiveness of the cover layer, a series of tests were carried out on the 90 ring and the 95 ring respectively at Hubei Xiaogan Diesel Engine Factory and Shanghai Internal Combustion Engine Factory.