金属洗涤剂和无灰分散剂系统提供的环带和活塞裙存款优越的控制，即使在最严酷的工作条件。
Metallic detergent and ashless dispersant additive system provides superior control of ring belt and piston skirt deposits, even under the most severe operating conditions.
采用动态氧化试验考察了清净剂与无灰分散剂对ZDDP作用机理的影响。
The interaction mechanism of the effects of detergents and ashless dispersant on ZDDP have been studied with the circulating oxygen absorption oxidation test.
聚异丁烯丁二酸酐（烯酐）是生产丁二酰亚胺型、丁二酸酯型和酚醛胺型无灰分散剂的重要中间体。
Polyisobutenyl succinic anhydride is an important intermediate for production of ashless deter- gent dispersants such as succinimide, succinic ester and phenolic amine types.
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