天然气HCCI稀薄燃烧可以得到极低的NO排放。
Natural gas HCCI lean burn can achieve very low NO emission.
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;
首先，研究了直喷汽油机滚流稀薄燃烧系统的组成、结构及其控制。
Firstly, this paper studies the components, structure and control of the tumble-stratification lean combustion system on GDI engine.
结果表明，该直喷汽油机具有较强的滚流性能，有利于分层混合气的形成和稀薄燃烧。
The results show that a rather strong tumble motion exists in this GDI engine, which is beneficial to the formation of stratified mixture and lean combustion.
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。
This paper briefly introduces a new lean combustion system which can effectively reduce fuel consumption rate and exhaust emissions.
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。
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.
强化空气运动的结果有利于组织燃料在缸内的浓度分布，从而为在二气门汽油机上实现稀薄燃烧打下基础；
The stronger air motions are helpful in organizing mixture strength distribution and then realizing lean mixture combustion in two-valve gasoline engines.
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。
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.
同时对稀薄燃烧、增压中冷发动机做了ECUI/O标定、怠速标定、冷启动标定、对电控系统进行全工况内点火提前角的标定、内空燃比的标定、发动机增压压力标定。
Then basic calibration such as ECU I/O calibration, idle speed calibration, cold start calibration, ignition advance calibration, air fuel ratio calibration, boost pressure calibration are conducted.
麻烦的是，高海拔的地段，氧气稀薄，螺旋桨叶片没有空气使其扇动，而且发动机燃烧汽油也需要氧气。
The trouble was that at high altitudes where there is less oxygen, the propeller blades had little air to bite and engines still needed oxygen to burn petrol.
登山队员用一根棍子将火焰移取到火炬上。中国专家两年前就开始研究火炬设计图，为了使火炬能在氧气稀薄的地方燃烧。
China's experts began to study the design of the torch two years ago in order to keep the flame alight in the oxygen-thin air.
模拟计算表明，利用早喷可以形成稀薄准均质混合气；燃烧室形状影响混合气浓度场和温度场。
The results show that the lean quasi-homogeneous mixtures can be formed by early-injection, and the shape of combustion chamber has an obvious effect on density and temperature fields of mixture.
模拟计算表明，利用早喷可以形成稀薄准均质混合气；燃烧室形状影响混合气浓度场和温度场。
The results show that the lean quasi-homogeneous mixtures can be formed by early-injection, and the shape of combustion chamber has an obvious effect on density and temperature fields of mixture.
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