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1、 密 級分類號編 號成 績本科生畢業(yè)設計 (論文)外 文 翻 譯原 文 標 題Diesel engine injection system譯 文 標 題柴油發(fā)動機噴射系統(tǒng)作者所在系別機電工程學院作者所在專業(yè)車輛工程作者所在班級B13142作 者 姓 名饒欽作 者 學 號20124014138指導教師姓名臧繼嵩指導教師職稱講師完 成 時 間2017年3月北華航天工業(yè)學院教務處制譯文標題柴油發(fā)動機噴射系統(tǒng)原文標題Diesel engine injection system作 者Jeff Daniels譯 名杰夫 丹尼斯國 籍美國原文出處Automotive Design Asia摘要：柴油噴射壓力
2、已提高到2000巴汽油直噴和壓電技術都變得越來越常見因為燃油供給系統(tǒng)在不斷地改革。大約在過去的五年中汽車燃油供給技術發(fā)生了一場革命其中變化最大的是柴油發(fā)動機在直噴柴油機上運用了共軌系統(tǒng)該系統(tǒng)安裝有壓電式噴油器現(xiàn)在正受到人們越來越多的關注。在汽油發(fā)動機方面現(xiàn)在也有往直噴技術發(fā)展的趨勢但這種趨勢逐漸趨緩而且并沒有都往這個方向發(fā)展也有其它新的技術諸如空氣引射技術但受材料方面的影響進展也較緩慢。關鍵詞：燃油供給系統(tǒng) 共軌系統(tǒng) 壓電式噴油器Abstract: the fuel injection pressure has increased to 2000 bar gasoline direct inj
3、ection and piezoelectric technology is becoming more common because of fuel supply system in constant reform.About in the past five years automotive fuel oil supply technology was a revolution is one of the biggest changes in diesel engine on the direct injection diesel engine using common rail syst
4、em is the system equipped with piezoelectric injector is now more and more attention by people. In gasoline engine now has to the trend of the development of the direct injection technology but the trend is gradually slow and not toward this direction also have other new technology such as air eject
5、or technology but also affected by the material aspects of the progress is relatively slow.Keywords: fuel oil supply system Common rail system Piezoelectric injectors1噴射系統(tǒng)發(fā)展 任何燃油供給系統(tǒng)最基本的功能是向每個汽缸供給足夠的燃油通過這種方式與吸進來的空氣混合并燃燒當然燃燒得越完全越好。隨著對汽車排放要求的提高對該方面的更精確控制變得很有必要。燃油供給系統(tǒng)不僅要改變循環(huán)供油量同時要改變噴油正時和噴油位置。 在90年代中期化油
6、器式的汽油機各項性能還能基本達到要求該技術是把然油和空氣在進氣歧管前混合當進氣門打開后可然混合氣流經(jīng)進氣歧管吸入氣缸但該技術在控制方面并不精確。之后化油器的大量改進針對的目標首先是完美地控制每個氣缸混合氣的濃度和量其次是克服系統(tǒng)高慣性的操空缺點再次是完成良好的混和與完全燃油燃燒。達到排放法規(guī)所規(guī)定的排放標準需要三元催化轉(zhuǎn)換器所以法規(guī)一出臺化油器變成為了歷史。有效的操作應該是應該是控制可然混合氣濃度即在大多數(shù)情況下把濃度控制在理論空燃比附近。結(jié)果燃油噴射變得強制性了。歐洲沒有采用美國早期的解決方法燃油在喉管噴射而是致力于開發(fā)在每個氣缸安裝一個噴油器的獨立噴射技術。所有噴油器同步工作技術在90年代
7、早期較為普遍在配有優(yōu)化正時技術時但是和排放方面的有些要求必須大量采用該方法。 此后問題成為解決方法應該向哪個技術方向發(fā)展。解決方案不斷出現(xiàn)燃油經(jīng)濟性和低排放驅(qū)動了歐洲排放法規(guī)向前邁進。通過提高壓縮比來提高熱效率的任何解決方法只要排放達標都被受視為可行的。從燃油系統(tǒng)的觀點看這將使汽油直噴技術推向關注前沿。該技術首先引起廣泛關注是在解決了使稀燃發(fā)動機高效率工作后使其在空然比圍501或者更稀的情況下運轉(zhuǎn)平穩(wěn)。然而即使不用高壓縮比它涉及到對該系統(tǒng)復雜的控制程序作處理直噴技術也有兩個特殊優(yōu)點，燃油在汽缸中的蒸發(fā)產(chǎn)生一個使爆燃可能性提高的冷卻效果它使壓縮比提高至111或121或更高，另外缸內(nèi)燃油噴射的準確
8、性與現(xiàn)代所有發(fā)動機內(nèi)漩渦以及氣流混和的類型有關此能力潛在地寫出了熱效率地提高。 柴油機的發(fā)展已有一百年多的歷史，其技術發(fā)展可分為三個階段。第一階段：20世紀20年代中期以德國Bosch公司為代表的機械式噴油系統(tǒng)代替了蓄壓式供油系統(tǒng)，這樣柴油機在車輛上的應用就產(chǎn)生了。第二階段：50年代初廢氣渦輪增壓技術，奠定了它在該行業(yè)中的動力裝置的基礎。第三個階段：80年代至今，現(xiàn)代微機作為電控單元的電控技術在柴油機上的應用，就有了現(xiàn)代先進汽車柴油機電控系統(tǒng)的產(chǎn)生和發(fā)展，使柴油機在動力性、經(jīng)濟性、排放及噪聲指標等具有了強有力的競爭能力。僅1993年統(tǒng)計，德國Bosch公司的電控分配泵和電控直列泵在市場上已超2
9、5萬臺，美國底特律柴油機公司DDEC電控泵噴嘴系統(tǒng)生產(chǎn)了10萬多臺，還有日本一些公司生產(chǎn)的可變預行程的TICS直列泵已達2萬多臺，其中絕大部分是電控的。另外如美國Caterpillar公司、日本Nippon公司、德國Denso公司都進行了共軌電控燃油噴射系統(tǒng)研究，并相繼投入到生產(chǎn)中。到目前為止，各國已研制并生產(chǎn)各種柴油機電子控制系統(tǒng)，有力的緩解了當前的世界性能源危機和汽車污染。一些汽車工業(yè)發(fā)達國家的柴油機電控技術水平目前已相當發(fā)達。 目前歐美國家中100重型車、90輕型車采用柴油機，歐洲的柴油轎車在轎車保有量中比例超過40，新車產(chǎn)量比例超過50。博世公司對中國市場的保守預測是，到2015年，柴
10、油車所占比例能達到25，而同樣到2015年據(jù)有些文章介紹在美國輕型車輛和轎車領域，柴油車的市場份額將提高到大約15。 柴油機的電子控制技術大致可分為3個階段：（1）20世紀70年代的初始研發(fā)階段，此時電控主要用于發(fā)電機組用柴油機； （2）20世紀80年代為實用階段，發(fā)展了多種位置控制式和時間控制式電噴系統(tǒng)，被控量也由原來的一種發(fā)展為多種； （3）20世紀90年代至今為成熟階段，功能更為強大的電噴系統(tǒng)可以控制噴油量、噴油正時、噴油壓力以及噴油率。1 Injection System DevelopmentAny fuel oil supply system is the most basic f
11、unction is to supply enough fuel to each cylinder in through this way and the suction air mixing and combustion of course burning as completely as possible. Along with the increase of vehicle emission requirements of the more precise control of become very necessary. Fuel oil supply system should no
12、t only change the cycle oil at the same time to change the injection timing and fuel injection location. In the mid - 90 - s carburetor type gasoline engine performance also can achieve the basic requirements of the technology is the natural oil, and the air in front of the intake manifold combinati
13、on as the inlet valve opens can however mixture flows through the intake manifold suction cylinder after but the technique in the aspect of control is not accurate. Carburetor after a lot of improvement in view of the target first is perfect to control each cylinder mixture high amount of concentrat
14、ion and the second is to overcome the system inertia operation point is once again available to complete a mixture of good and full fuel combustion. Reach the emission standard stipulated in the emission regulations need to ternary catalytic converters so regulations introduced a carburetor into to
15、history. Effective operation should be should be control can be natural mixture concentration is in most cases the concentration near the theory air-fuel ratio control. The fuel injection has become mandatory. Europe did not adopt the early solution to the fuel in the throat spray but devoted to the
16、 development in each cylinder to install a fuel injector independent injection technology. All fuel injector synchronization technology in the early 90 s more common but when equipped with timing optimization technology and emissions of some requirements must be a lot by using this method. Since the
17、n to solve the problem which should be referred to the technology development direction. Solution appear constantly fuel economy and low emission driving forward the European emissions regulations. Through improving the thermal efficiency of the compression ratios to improve any solution as long as
18、the emission standard is as feasible. From the fuel system point of view that will make gasoline direct injection technology to focus on cutting edge. The technology widely attention was first after solved make efficient lean combustion engine work in the empty but than the circumference of 501 or m
19、ore thin cases, smooth operation. Even without a high compression ratio, however, it involves the control program of the system is a complex deal with direct injection technology also has two special advantages, evaporation of fuel in the cylinders explosion resulted from a possibility to improve th
20、e cooling effect of it to improve compression ratio by 111 or 121 or higher, and the accuracy of the fuel injection in cylinder with all modern vortex and air mixture in the engine on the type of the ability to potentially wrote to increase thermal efficiency.The development of diesel engine is more
21、 than 100 years old and its technical development can be divided into three stages. First stage: in the mid - 1920 - s represented by Germany Bosch company mechanical injection system to replace the accumulator type oil supply system, the application in vehicle diesel engine is generated. Phase two:
22、 exhaust turbo-charging technology in the early 1950s laid the foundation for its power plant in the industry. Third stage: since 80 s, modern microcomputer as electric control technology application in diesel engine electronic control unit (ECU), there will be a modern advanced the emergence and de
23、velopment of electric control system of automotive diesel engine, the diesel engine in performance, fuel economy, emissions and noise index has a strong competitive ability. Only in 1993, Germany Bosch company electric distribution pump and electric inline pump in the market has more than 250000 Tai
24、wan, the United States Detroit diesel engine company DDEC electric pump nozzle system produced more than 100000 units, there are some Japanese company produces the variable in the process of the trip TICS inline pump has reached more than 20000, most of them are electronically controlled. Other comp
25、anies such as Caterpillar, Nippon, Denso, and Denso, Germany, have conducted research on the common rail fuel injection system, which has been put into production. So far, countries have developed and produced various diesel electronic control systems, effectively alleviating the current world energ
26、y crisis and automobile pollution. The level of diesel electric control technology in some developed countries is now quite advanced. At present the home in the United States by 100%, 90% light vehicle diesel engine using heavy trucks, European diesel car in car ownership more than 40%, more than 50
27、% new car production. Boschs conservative forecast is for the Chinese market, in 2015, the proportion of diesel vehicles can reach 25%, and by 2015 according to some articles on the same light vehicles and passenger cars, in the United States market share of diesel will increase to about 15%. The el
28、ectronic control technology of diesel engines can be divided into three stages: (1) the initial development phase of the 1970s, when the electric control was mainly used in diesel engines for generators. (2) in the 1980s, a variety of location-control and time-controlled electric spraying systems we
29、re developed for the practical stage, and the controlled quantity was also developed from one of the original ones. (3) in the 1990s, a more powerful electric system could control the flow of oil, timing, oil pressure and fuel injection. 指 導 教 師 評 語 外文翻譯成績：指導教師簽字： 年 月 日注：1. 指導教師對譯文進行評閱時應注意以下幾個方面：翻譯的外文文獻與畢業(yè)設計（論文）的主題是否高度相關，并作為外文參考文獻列入畢業(yè)設計（論文）的參考文獻；翻譯的外文文獻字數(shù)是否達到規(guī)定數(shù)量（3 000字以上）；譯文語言是否準確、通順、具有參考價值。2. 外文原文應以附件的方式置于譯文之后。
外文翻譯-某型電控柴油發(fā)動機動力性分析
