中重型电控共轨柴油机机油中碳黑问题的研究  

Study on Soot-In-Oil in MD&HD Common Rail Diesel Engine

作　　者：王一江[1,2] 董尧清[1] 

机构地区：[1]同济大学汽车学院,上海201804 [2]一汽解放汽车有限公司无锡柴油机厂,无锡214026

出　　处：《内燃机工程》2010年第2期1-5,共5页Chinese Internal Combustion Engine Engineering

摘　　要：为满足国-Ⅲ排放而推迟喷油,使中重型电控共轨柴油机机油中碳黑迅速增加,出现机油过早劣化的问题。阐述了国-Ⅲ排放共轨柴油机机油中碳黑的形成机理,对柴油机燃烧系统匹配的理论进行研究,探讨控制和降低柴油机机油中碳黑的措施。研究结果表明:通过优化柴油机喷油结束时间与燃烧室唇口部位设计等能有效地解决这一问题。在国-Ⅲ电控共轨柴油机上进行相关台架试验,对机油中的碳黑进行了监测。结果表明:发动机运行30 h后,机油中碳黑含量为0.43%,远小于AVL的推荐值。To fulfill China-Ⅲ stage emission regulation, the MD＆HD diesel engines adopt the measure to delay fuel injection, causing soot-in-oil increasement sharply and lubrication oil deterioration earlier. The formation mechanism of soot-in-oil in the China-Ⅲ CR diesel engine was explained theoretically. From the matching principle of diesel engine combustion system, the countermeasures were discussed. Optimizing injection end timing and the shape of combustion bowl lip may effectively solve above problem. These countermeasures were validated on a real 9 L China-Hi CR engine. The lubrication oil examination results indicate there is only soot content of 0.43% in lubrication oil after 30 h engine running, far below the limit recommended by AVL.

关 键 词：内燃机 中重型柴油机 共轨 国-Ⅲ 排放 机油 碳黑 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]