液化石油气

Premise Liquefied petroleum gas is derived from oil gas, natural gas, the gas production of refinery and petrochemicals. The main components are dimethylmethane, propylene, butane, butylene and such low class hydrocarbon. It's a gas with achromaticity and transparence; LPG is hardly dissolved in water, but dissolved in ethanol and aether, it can dissolve gas production, propagation oil and caoutchouc.

液化石油气（liquefied petroleum gas，LPG）是石油伴生气、天然气、炼油厂及石油化工厂的气体产品，经分离精制而来，其主要成分为丙烷、丙烯、丁烷、丁烯等低分子烃；无色透明，带有微弱的臭味；难溶于水，溶于乙醇和乙醚等，并能溶解石油产品，动植物油和天然橡胶。

Public awareness and knowledge on LPG should be targeted at local officials and end-users in rural areas.

公众意识和液化石油气的知识应针对当地官员和终端用户在农村地区。

Along with energy crisis and worsened environment becoming more and more intensively, gas-vehicle receives the unprecedented recognition because of its less emissions, more economical and saving petroleum resource. The research and utilization of gas-vehicle develop quickly all over world. Of course, automotive fuel changing from gasoline and diesel into gas fuel is also carried out blazingly everywhere in our country.

中文题名燃气汽车发动机燃烧特性及工作性能研究副题名外文题名 Study on combustion characteristics and performances of automotive engine by gas fuel 论文作者詹樟松导师夏来庆教授学科专业动力机械及工程研究领域\研究方向学位级别博士学位授予单位浙江大学学位授予日期2001 论文页码总数132页关键词汽车发动机燃气汽车发动机燃烧馆藏号BSLW /2001 /U464 /32 随着能源危机和生态恶化日益严重，燃气（主要指压缩天然气和液化石油气）汽车以其优良的排放、良好的经济性以及能够部分替代紧张的石油资源而受到了空前重视，世界范围内燃气汽车的研究和应用也随之空前高涨。

When used as vehicle fuel, it is commonly known as liquefied petroleum gas (LPG or LP-gas), which can be a mixture of propane along with small amounts of propylene , butane , and butylene .

当用作汽车燃料，它通常被称为液化石油气，这可能是一个混合丙烷连同少量的丙烯，丁烷和丁烯。

Based on the quasi-dimension combustion model, the emission model is set up in this dissertation. The NO emissions in different conditions of LPG engine can be simulated and calculated by the model. The calculated results show that the NO emissions are larger influenced by ignition timing and less influenced by compression ratio, finally, choosing a right coefficient of excess air will have great effect to reduce NO emissions.

本文在建立的准维燃烧模型基础上建立了排放生成模型，利用该模型对液化石油气发动机在变参数情况下NO的排放生成情况进行了模拟计算，计算结果表明点火提前角对NO的生成影响较大，压缩比对NO的生成影响较小，而选择合适的过量空气系数更是对降低NO的生成起着关键作用。

The article mostly discusses gas application burning excess air coefficient calculation methods, introduces different calculation formula application range, and giving examples in natural gas, liquefied petroleum gas and manufactured gas calculate its excess air coefficient on the same oxygen content of fuel gas, and the influences of excess air coefficient to air consumption and fuel gas production during burning process.

文章主要论述了燃气具燃烧过剩空气系数的计算方法，介绍了不同过剩空气系数计算公式的使用范围，并举例天然气、液化石油气和人工煤气三气种燃气具在测得烟气中相同氧含量时过剩空气系数的计算方法，以及过剩空气系数对燃气具在燃烧过程中消耗空气量和同时产生烟气量的影响。

Another important reason is that the structural parameter of original gasoline engine is designed to aim at the combustibility of gasoline and it misfits the combustion of LPG.

而另一个重要原因是原汽油机的结构和参数是针对汽油的燃烧特性而设计的，并不适合于液化石油气的燃烧做功。

Engines using compressed natural gas, liquified petroleum gas and other alternative fuels

使用压缩天然气、液化石油气和其他代用燃料的发动机

Mr Pierre Cavalieros, chairman of Sofregaz, commenting on this MOU said:"We are very proud to establish this preferred relationship with the major gas player Shell, as it confirms our leadership in the LNG/LPG market."

Sofregaz公司主席皮埃尔·卡瓦列罗斯在评价该备忘录时说：&我们感到很荣幸，该合作将加强我们在液化天然气和液化石油气市场的领导地位。&

The bulk of these upward revisions occurs in North America and reflects increased demand for liquids, LPG and ethane, due to heating and industrial use and increased petrochemical demand. Baseline 2001 revisions due to resubmissions of annual data from OECD Member countries carry forward into succeeding periods, raising 2003 and 2004 demand accordingly.

需求量上调的地区主要是北美，原因是取暖用油和工业用油以及石化工业对于液化天然气、液化石油气以及乙烷的需求都上调了。2001需求数据修正的另一部分原因是经合组织成员国修正了各自国内的年度数据，我们也据此相应提高了2003年和2004年的数据。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了