When the CH4-air mixture approaches the lean fuel state, the flame speed accordingly decreases, the flame cone rising and retreating downstream to the area with lower flow speed.
从化学计量向贫燃料状态靠近时，预混火焰强度减弱，火焰传播速度减小，锥形火焰面逐渐增高，退到流速较低的下游区域；
Lean burn mixture combustion of gasoline engine is an effective approach for reducing emissions and fuel consumption.
汽油机燃烧稀混合气是降低有害尾气排放、燃油消耗率的有效途径。
But in the fuel lean and fuel rich explosive gas, the electrical conductivity increases gradually from bottom to top.
贫燃料与富燃料爆炸气体中，由管道底部向上，其电导性是逐渐增大的。
This paper briefly introduces a new lean combustion system which can effectively reduce fuel consumption rate and exhaust emissions.
简要介绍了一种新型的汽油机的稀薄燃烧系统，可以有效地降低燃油消耗率和废气排放。
Quasi homogeneous charge compression ignition (QHCCI) combustion may be with low emissions, especially for soot and NO_X, according as the most fuel which is pre-mixed is lean burnt.
准均质充量压缩点火燃烧(QHCCI)方式占总燃料多数的预混合燃料以稀薄燃烧完成，故可能有很低的排放，尤其是碳烟和氮氧化物。
The results show that the effects of speed on the exhaust gas emission and fuel economy are related with the ratio value and the absolute time of lean burn and rich burn.
结果表明：稀燃发动机转速对其有害气体排放和燃油经济性的影响与稀燃吸附还原催化转化器稀燃运行时间与浓燃还原运行时间比值大小和绝对时间大小有关。
This strategy furnishes an extremely lean overall mixture for idling and part-throttle operation, with commensurate reductions in fuel consumption.
这个战略装备虚度光阴和部分节流孔操作的一个极端精瘦的整体混合物，与对燃料消费的比照减少。
A lean mixture combustion system is presented in this paper. And the test effect of fuel injection time, fuel adjustment, miximum load speed and emission characteristics are analysed.
介绍了一种汽油机的快速稀燃系统，并对该系统的喷油时刻，燃油调整特性，外特性及排气性能等进行了试验分析。
Using a small flow number atomizer may obviously improve the lean ignition limit of the high density fuel, but the ignition velocity-pressure limit and the rich ignition limit are shrunk.
使用小流量数喷嘴可显著改善大比重油的贫油点火性能，但点火的压力-速度边界和富油点火边界缩小了。
The experimental investigation was conducted for the fuel circumferential staging combustor with two domes to improve the lean blowout fuel air ratio.
为降低贫油熄火油气比，对双头部燃烧室进行了燃油周向分级贫油熄火模拟实验研究。
The effect of variable swirl on the fuel consumption of SI engine when TEFI (Twice Electronic fuel Injection) was adopted to lean burn combustion was studied.
主要研究了火花点燃式发动机采用二次喷油技术实现稀薄燃烧时，可变涡流对燃油经济性的影响情况。
For indirect ignition method, the condition of fuel rich ignition torch was studied in contrast with the condition of fuel lean ignition torch.
在间接点火方案中对点火火炬为富燃和富氧两种情况进行了对比分析。
Compared with stoichiometric mixture operation, fuel economy and emissions are remarkably influenced by injection timing when lean mixture is applied.
在发动机燃用稀薄混合气时，喷油定时对排放和经济性的影响较为明显。
Lean burn; Twice electronic fuel injection; Quasi-homogenous mixture; 2-valve SI engine;
稀薄燃烧；两次喷油；准均质混合气；二气门汽油机；
Lean burn; Twice electronic fuel injection; Quasi-homogenous mixture; 2-valve SI engine;
稀薄燃烧；两次喷油；准均质混合气；二气门汽油机；
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