摘要
为克服传统喷油助燃再生方式存在的火焰难以形成、点火容易丢失和引起二次污染等问题，采用了缸内后喷与排气管喷油相结合的微粒捕集器（DPF）再生系统。利用台架试验研究了缸内后喷对发动机性能的影响。为满足氧化催化器（DOC）工作温度需求，在发动机排气温度250～350％范围内的工况进行试验，得到不同工况下的最佳缸内后喷时刻、喷油量和排气管喷油量，并绘制了相应的MAP图。
To overcome the problems of burner-type regeneration scheme, i.e. the difficultly in forming flame and the tendency of miss-fire, leading to secondary pollutions, a diesel particulate filter （DPF） regeneration system combining in-cylinder fuel post-injection and exhanst-pipe fuel injection is adopted with the effects of in- cylinder fuel post-injection on engine performance studied by bench tests. For meeting the requirements of operation temperature of diesel oxidation catalyst （DOC）, engine tests are also conducted in different working conditions with exhaust temperatures in the range of 250 - 350~C, so the optimal quantity and timing of in-cylinder post-injection and the quantity of exhaust pipe fuel injection for different conditions are obtained with their corresponding maps shown.
出处
《汽车工程》
EI
CSCD
北大核心
2015年第4期391-395,共5页
Automotive Engineering
基金
国家863计划项目(2013AA065303)资助
