高压共轨柴油机后喷对机油稀释影响的试验研究  

Experimental Research on the Influence of Post-injection on Oil Dilution with High Pressure Common Rail Diesel Engines

作　　者：李进普[1] 沈国华[1] 任向飞[1] 王亮[1] 曹付广[1] 刘健[1] 刘宏洋[1] 牛立亚 马燕[1] 侯亮[1] 

机构地区：[1]长城汽车股份有限公司,河北保定071000

出　　处：《柴油机》2015年第4期11-13,27,共4页Diesel Engine

摘　　要：针对高压共轨柴油机为实现、DPF的主动再生，实施燃油后喷导致发动机机油稀释的问题进行试验研究。试验使用两次后喷，第一次后喷在上止点后20°-40°，第二次后喷在上止点后120°-180°。研究表明：通过适量使用后喷1，尽量减小后喷2的油量，适当调整后喷2的喷油正时，可实现达到DPF主动再生目标温度的同时，最大程度地降低由于后喷作用引起的机油稀释现象。To solve the problem that high pressure common rail diesel engine met with oil dilution during post-injection for DPF regeneration, experimental research were carried out. The experiment used two in- jections method, the first injection was 20°-40° after the TDC, and the second injection was 120°- 180° after the TDC. The research show that with proper amount of oil at the first post-injection, and minimize the oil injection at the second post-injection while properly adjust the injection timing, DPF regeneration temperature could be achieved, and the phenomenon of oil dilution due to post-injection could be mini- mized.

关 键 词：微粒捕集器 再生 机油 稀释 喷油正时 喷油量 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]