柴油机
柴油機
시유궤
DIESEL ENGINE
2012年
3期
14-17,21
,共5页
非道路用柴油机%喷油提前角%性能
非道路用柴油機%噴油提前角%性能
비도로용시유궤%분유제전각%성능
off-road diesel engine%fuel injection timing%performance
以一台四缸非道路移动机械用柴油机为试验发动机,在喷油提前角为3℃A、1℃A和-1℃A条件下,对发动机的外特性、经济特性以及排放特性进行了研究。研究表明:喷油提前角的推迟,对发动机动力性影响不大;但对柴油机的经济性影响比较大,尤其是发动机运行在中高转速时;喷油提前角对排放也有较大影响,随着喷油提前角的推迟,CO和HC排放增加,NOx排放得到一定程度的改善;喷油提前角3℃A下的八工况点比排放得到大幅改善。因此,通过调整喷油提前角可使该非道路用柴油机达到拟国3排放法规的要求。
以一檯四缸非道路移動機械用柴油機為試驗髮動機,在噴油提前角為3℃A、1℃A和-1℃A條件下,對髮動機的外特性、經濟特性以及排放特性進行瞭研究。研究錶明:噴油提前角的推遲,對髮動機動力性影響不大;但對柴油機的經濟性影響比較大,尤其是髮動機運行在中高轉速時;噴油提前角對排放也有較大影響,隨著噴油提前角的推遲,CO和HC排放增加,NOx排放得到一定程度的改善;噴油提前角3℃A下的八工況點比排放得到大幅改善。因此,通過調整噴油提前角可使該非道路用柴油機達到擬國3排放法規的要求。
이일태사항비도로이동궤계용시유궤위시험발동궤,재분유제전각위3℃A、1℃A화-1℃A조건하,대발동궤적외특성、경제특성이급배방특성진행료연구。연구표명:분유제전각적추지,대발동궤동력성영향불대;단대시유궤적경제성영향비교대,우기시발동궤운행재중고전속시;분유제전각대배방야유교대영향,수착분유제전각적추지,CO화HC배방증가,NOx배방득도일정정도적개선;분유제전각3℃A하적팔공황점비배방득도대폭개선。인차,통과조정분유제전각가사해비도로용시유궤체도의국3배방법규적요구。
Based on one experimental diesel engine with four cylinders used by non-road mobile machinery,the external characteristics,economic performance and engine emission were studied deeply with different fuel injection timing of 3℃A,1℃A and-1℃A.The results indicated: the delaying of fuel injection timing has not much effect on dynamic characteristic of diesel engine,while economic characteristic of engine closely relates to fuel injection timing,especially when running at medium and high speed.The emission characteristic of engine is also Influenced by fuel injection timing.CO and HC emission of engine increases with delaying of fuel injection timing,while the tendency of NOx emission is different to that of CO and HC emission,improved to a certain extent.Emission quantity under eight operating modes with fuel injection timing 3℃A drops greatly.Moreover,diesel engine with poor emission performance used by off-road mobile machinery can meet requirement of emission regulation by technical means of changing fuel injection timing.