可实现多种形式燃烧的试验系统开发

针对发动机燃烧过程开发设计的专门试验装置,装置主要由燃烧器部分、混合气配给系、燃料/空气预混合系、喷油系、点火系、控制系统和数据采集分析等系统组成,不仅具备良好的燃烧边界条件可控性,而且可实现对多种燃料、多种点火方式的燃烧进行试验研究.在相应仪器设备配套情况下,可对动态信号、光谱信号及相关稳态参数信号进行采集分析,可完全模拟发动机的燃烧工作过程.     

定容燃烧模拟装置的研制

发动机工作过程的研究不仅是车辆的研究重点方向之一,而且也是热能动力机械行业的研究重点之一.定容燃烧模拟器可以实现对发动机的定容加热燃烧过程的研究.文章就所研究的定容燃烧模拟装置的结构组成、功能和工作原理进行了论述,该结构主要由气源、定容燃烧弹体、燃料/空气混合器、混合气配给系、点火系、控制系统和数据采集等系统组成.可以实现对定容燃烧过程边界条件精确控制,剔除点燃式发动机定容加热过程中众多杂乱影响因素,从而清晰地反映出燃烧过程及其影响因素的作用.     

ZB-10D型油泵转速故障研究及设计改进方案

一 引言 ZB—10D型油泵,是一种带有多种自动控制装置的高压柱塞式变量燃油泵。用于WP—6 A型发动机主燃料系统中,按发动机的燃油需用特性向发动机供油,保持发动机状态工作的稳定性。 该泵在设计定型后的首批生产中,出现了转速调节器控制的大车工作状态平衡转速低的故障。后经反复试验研究,重新设计制造了转速调节器分油阀弹簧,故障才被排除。     

旋转爆轰发动机中的燃料分层喷注方法（英文）

目的:通过优化燃料喷注,提高旋转爆轰发动机的推进稳定性和推进效率。创新点:提出了燃料分层喷注的新方法,降低了燃料提前燃烧比率和燃烧室平均温度,进而有效地提高了旋转爆轰波的稳定性和发动机的比冲。方法:以数值模拟为手段,应用基元反应建立化学非平衡流动的数学物理模型,开展发动机推进性能优化研究。结论:1.研究证实了燃料的提前燃烧现象是发动机推进性能的损失机制之一;2.提出的燃料分层喷注方法可以有效提高燃料以爆轰形式组织燃烧的比例,并提高发动机比冲。     

新发动机系列提高效率且经济实惠

新发动机系列提高效率且经济实惠李洪译张启校无论是燃料效率还是排气污染控制的所有额定值都能被优化。燃料消耗可减少１５％之多而排气污染程度仍有改善。凯特皮拉发动机部给船舶发动机３５００家族引进了一组新成员。被定为３５００系列Ｂ的这种新发动机的特性是在增加...     

现代汽车脱挡滑行与挂挡滑行节油分析

现代电子燃油喷射发动机的汽车,利用怠速控制装置和喷油量控制装置,对汽车各种工况进行燃油喷油量调整控制,实现了挂挡滑行节油效果,提高了发动机燃油的经济性和行车安全性。     

电控发动机实践教学探讨

随着汽车技术的不断发展,新型的汽车发动机目前采用的都是电子控制技术。汽车的发动机也都采用了电控发动机,这种发动机可以极大地改善和提高汽车的动力性和燃料经济性,特别是能够有效地降低汽油发动机排放的废气,从根本上控制环境污染。     

漫谈内燃式热机“家族”俩兄弟

汽车的心脏是发动机.发动机有汽油发动机和柴油发动机之分.无论是汽油发动机还是柴油发动机,它们都属于内燃式热机(简称内燃机),都是燃烧燃料后通过推动气     

汽油/LPG两用燃料发动机油气最佳切换点试验研究

LPG作为车用发动机的代用燃料,对解决能源短缺和降低发动机的排放有许多优势,但是几乎所有的车辆都存在一个问题——切换过程中的排放过高。进行了汽油/LPG切换过程试验方案设计,使用均匀设计方法对试验结果进行分析处理,对油气切换过程进行了研究,并对最佳切换点进行了优化,为进一步改进两用燃料发动机切换过程的控制提供理论依据。     

节能环保型燃料混合实验系统的开发

介绍了以柴油乳化为基础的节能环保型燃料的混合、测试等实验系统装置的开发,实验装置包括燃料混合装置、柴油机测试系统和电涡流测功系统等。该装置燃料混合可采用不同的混合方法,测试系统完全由计算机控制,操作简单。试验使用配制不同柴油与水混合比例的乳化油进行了一系列的发动机台架性能实验,实测了柴油机缸内压力和主要的排放数据和试验结果,并进行了系统分析。结果表明,柴油机燃用乳化油确实能起到节油的作用,并且使排放的有害物质NOx、HC和烟度等在不同程度上得到降低,具有一定的推广价值。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.