At present , for auto engineers , the most important job is to design and develop more clean substitute fuel engines . we will solve the problems of environmental pollution and energy crisis strategically by using these engines 开发和发展相对比较清洁的代用燃料汽车就成为汽车工作者的当务之急，对解决能源和环境问题具有重要的战略意义。
However , compared with using pure diesel oil , thc and co emissions were increased when using emulsified fuel . from the results we can conclude that emulsified fuel can reduce emissions and save fuel , thus it will have good prospect 由试验结果可以看出，燃油乳化技术是一种降低油耗、改善排放的有效手段，因此乳化油是一种很有发展前途的代用燃料。
It is showed by research that it ' s cetane - value is so high that dme is perfectly suitable to be alternative fuel of diesel engine , and it is hopeful meeting the future stringent emission regulation of diesel engine because of it ' s clean combustion 研究表明， dme的十六烷值高，非常适合作为柴油机的代用燃料，而且它能实现洁净燃烧，有望满足未来严格的柴油机排放法规。
The absence of energy sources and the pollution of environment is the two problems that embarrassed the development of internal - combustion engine engineering , and searching for alternative fuel is a important ways to solve these problems 能源短缺与环境污染是困扰内燃机工业发展的两大难题。针对困扰内燃机工业发展的两大难题，寻求清洁代用燃料是解决难题的一种重要方法和手段。
Engine is the main motive power for its efficient and easy energy using . in recent years , the research on clean alternative fuels is becoming an important direction of engine due to the shortage of the global petroleum resource and serious air pollution 发动机以其方便、高效的能源利用方式在世界原动力机上占据了绝大部分，但是随着能源供应结构的改变以及大气污染的加剧，人们对发动机的研究开始转向廉价、洁净的代用燃料。
The theme of paper is study on the application of liquefied petroleum gas to motorcycle engine . through analyze the combustion and exhaust characteristics of lpg and petrol , the experiment system adopts electronic control system of liquefied petroleum gas injection to provide fuel for motorcycle engine . through researching the characteristic and adjustment factor of air fuel ratio , the paper can offer exactitude theories and viable plan for more effective using lpg , optimum matching electronic control system of liquefied petroleum gas injection with motorcycle engine and intelligent control 本文分析了代用燃料液化石油气与汽油的燃烧特性和排放特性，就液化石油气在摩托车发动机上的应用进行了初步的研究，利用液化石油气电控喷射系统控制燃料供给系统，进行对空燃比控制特性及其影响因素的研究，达到为进一步合理利用液化石油气，进行液化石油气电控喷射系统与发动机的有效配匹，实现智能管理的目的，并为控制系统提供理论依据。
Cummins is in the list of us fortune top 500 , the largest independent engine manufacturer , powering more types of equipment in more markets than any other engine company , design , manufacture and market diesel and alternative fuel engines , filtration and exhaust systems , power generation systems and related components 康明斯是美国财富五百强企业，全球最大的独立发动机制造商，设计、制造和经销柴油和代用燃料发动机，滤清和排气系统，发电系统以及相关的零部件产品。
With pollution of atmosphere increasing and the environment of human being living deteriorating , and resource of petroleum decreasing every year , people make a request for vehicle , which mainly raise the pollution of atmosphere in city . they wish the vehicle have the low emission and new fuel can substitute the petroleum appear 随着地球大气污染的日益严重、人类生存环境的恶化，以及石油资源的日益匮乏，人们对城市大气主要污染源的机动车提出了新的要求，即降低机动车的有害排放，并积极研究机动车的代用燃料。
This thesis firstly focuses on the way of using cng in turbocharged diesel engines . aiming at the automobile diesel engine of the type of d6114 , some experiments contrasted the differences in performance between the diesel / cng dual fuel engine and the mere diesel engine . the result shows that some suitable strategies must be followed in the use of cng in turbocharged diesel engines to certify the good dynamic performance and low emission 论文首先探讨了增压发动机使用代用燃料( cng )的方式，针对d6114型车用增压发动机进行了原机和双燃料发动机的对比实验，实验结果表明， cng在增压发动机上的掺烧需要遵循一定的掺烧策略才能保证良好的动力性能和实现较低排放。
Abstract : through the analysis of co , nox and hc discharged f rom substitute fuel of motor vehicles , it ' s shown that the substitute fuel is goo d in minimizing tail gas pollution and protecting city environment . it ' s an effec tive way to improve atmosphere quality of cities 文摘:通过对机动车代用燃料的co 、 nox 、 hc及烟度等排放情况的分析，指出代用燃料在减轻机动车尾气污染、保护城市环境方面一般有着较好的表现，认为大力发展代用燃料是提高城市大气环境质量的有效途径。
