柴油機(jī)引擎中英文翻譯、外文文獻(xiàn)翻譯

附錄一：外文翻譯柴油機(jī)引擎歐洲市場設(shè)計(jì)的ISBe型柴油機(jī)登場其符合歐3排放標(biāo)準(zhǔn)，沒有EGR和排氣再處理裝置歐洲引擎同盟EEA）的第一代產(chǎn)品在歐洲亮登場。最近在伯明翰召的商3車展示會(huì)上Cummins公司向世人展示了其生產(chǎn)的先進(jìn)的符合歐標(biāo)準(zhǔn)的ISBe型柴油機(jī)，其包含一種3.9L、四汽缸、16個(gè)汽門的引擎和一種5.9L、六汽缸、24個(gè)汽門的模型，兩者均有意取代現(xiàn)今歐洲市場的B系列柴油機(jī)。同時(shí)Cummins公司也展示它的符合歐3標(biāo)準(zhǔn)的ISCe柴油機(jī)，其名稱中的字母e〃表示了這一款是專門為歐洲市場設(shè)計(jì)的。EEA是1996年五月份宣布成立的，其由ummins公司、CNH在全球的NV公司（從前的新荷蘭）及Iveco公司共同投資組成。聯(lián)盟主要致力于發(fā)展和生產(chǎn)一種新型的應(yīng)用上下公路的每個(gè)汽缸1.0L的柴油機(jī)。Cummins公司宣稱，這種類型的發(fā)動(dòng)機(jī)在北美洲還沒有公司提出。在宣布新的柴油機(jī)的同Cummins公司指出EEA中的每一個(gè)合作伙伴均生產(chǎn)自己的發(fā)動(dòng)機(jī)相互之間的產(chǎn)品有一些輕微的不同。在最近的公布的報(bào)道中描述其之間的首要不同即為Cummins公司的發(fā)動(dòng)機(jī)主要面對的是汽車上公路的使用應(yīng)用的是Cummin公司發(fā)動(dòng)機(jī)電子控制的核心技術(shù)。整個(gè)系統(tǒng)同時(shí)也應(yīng)用在公司的ISM型及600型的發(fā)動(dòng)機(jī)上，其設(shè)計(jì)主要是著手于使性能、經(jīng)濟(jì)性、噴射及自動(dòng)監(jiān)控等各參數(shù)優(yōu)化以提供給發(fā)動(dòng)機(jī)需要診斷的數(shù)據(jù)及必要的保護(hù)'。這些高度復(fù)雜的中間階段動(dòng)力組的應(yīng)用將會(huì)給歐洲的卡車和公共汽車的駕駛員提供重要的〃價(jià)值terMcDowell,Cummin歐洲汽車商業(yè)公司副總裁如是說，〃對于第一次應(yīng)用的ISBe型以及ISCe型引擎來說，間階段動(dòng)力組勒機(jī)的駕駛員將會(huì)有先進(jìn)的設(shè)銅時(shí)生產(chǎn)力的提高也對于Cummin公司的技術(shù)提高有很大的益處。3.9L、四汽缸的ISBe型發(fā)動(dòng)機(jī)有額定率分別為135、150和170馬力三種轉(zhuǎn)速為2500轉(zhuǎn)/分時(shí)輸出扭矩為369ft.lb.,而輸出扭矩為406及443ft.lb.分別對應(yīng)轉(zhuǎn)速為1200轉(zhuǎn)/分及1600轉(zhuǎn)/分。5.9L、六汽缶的ISBe型發(fā)動(dòng)機(jī)有185、220和250馬力三種轉(zhuǎn)速為2500轉(zhuǎn)/分時(shí)輸出扭矩為516ft.lb.,而輸出扭矩為516及605ft.lb.分別對應(yīng)轉(zhuǎn)速為1200轉(zhuǎn)/分及1600轉(zhuǎn)/分。這些新型的發(fā)動(dòng)機(jī)全部在歐洲進(jìn)行設(shè)計(jì)并且將會(huì)在英國的Cummin公司的車間制造。大批量的生產(chǎn)要從明年開始公司宣布。而發(fā)動(dòng)機(jī)的主要構(gòu)件將來源于U.,這也是Cummin公司的歐洲技術(shù)中心所在地，其提供發(fā)動(dòng)機(jī)性能發(fā)展及交通工具的測試設(shè)備。依照Cummins公司的說法典型的ISBe型發(fā)動(dòng)機(jī)將應(yīng)用在大卡車、能拉噸的拖車、中小型公共汽車、全長公車、專用的總重為7.5到18噸的交通工具、軍用車輛等這種發(fā)動(dòng)機(jī)的設(shè)計(jì)也為將來的歐4標(biāo)準(zhǔn)發(fā)動(dòng)機(jī)打好了技術(shù)基礎(chǔ)?！ㄟ@種新型的ISBe型發(fā)動(dòng)機(jī)提供了許多操作方面的方便,McDowell說,〃新的發(fā)動(dòng)機(jī)提供了很高的動(dòng)力和扭耕且改良了燃油的經(jīng)濟(jì)性，在沒有廢氣再處理及廢氣再循環(huán)裝置（EGR）的情況下達(dá)到了歐3標(biāo)隹〃。其他的進(jìn)步方面還包括了增加了發(fā)動(dòng)機(jī)的精度并減少噪音至9分貝，而且減少了日常的維護(hù)對于發(fā)動(dòng)機(jī)的使用標(biāo)準(zhǔn)油5來說它把一次性加油的使用期限延長為了行駛30,000英里。在保持TB系列發(fā)動(dòng)機(jī)的緊湊的尺度和輕重量的基礎(chǔ)（B汽缸發(fā)動(dòng)機(jī)為815.85磅;較大的類型為1036.35磅），新型的發(fā)動(dòng)機(jī)為了減少噪音和振動(dòng)將外形流線用一種梯形結(jié)構(gòu)組裝成一個(gè)穩(wěn)定的整偷且外行流線的整和除去外面的軟,1代替為一個(gè)清潔器設(shè)計(jì)，以增加冷卻和潤滑并延長了發(fā)動(dòng)機(jī)的使用壽命。四汽te!9L的ISBe型發(fā)動(dòng)機(jī)油容量為13.74夸脫而六汽缸、5.9L的發(fā)動(dòng)機(jī)有20.61夸脫的潤滑油系統(tǒng)容量。一根有盒式磁帶型油封的高拉鋼曲軸十分耐明之相連的連桿擁有一種新形的結(jié)*且碗狀形燃燒室活塞嵌入了耐蝕鎳圈。高功率的ISBe型柴油機(jī)的特點(diǎn)體現(xiàn)在其活塞采用了直接冷卻系統(tǒng)。低廉的養(yǎng)護(hù)搖桿系統(tǒng)被設(shè)計(jì)為在閥調(diào)整事項(xiàng)之前至少運(yùn)行124,000里,Cummins公司說＞每個(gè)汽缸蓋的四個(gè)閥包括整體的進(jìn)氣岐管和兩排氣歧管以提高其適應(yīng)繁重任務(wù)的能力氣缸蓋還增口了一個(gè)恒溫器，改良了對冷閘的控制能力。3.9L的發(fā)動(dòng)機(jī)有一個(gè)8.98夸脫的冷卻系統(tǒng)容:?比較大的發(fā)動(dòng)機(jī)有一個(gè)0.57個(gè)夸脫的冷卻系統(tǒng)容量。為了達(dá)到減小噪音的目的，發(fā)動(dòng)機(jī)設(shè)計(jì)了一個(gè)隔離的頂蓋和附屬的挺蓋。另外發(fā)動(dòng)機(jī)還含有一個(gè)橡絞墊圈以隔離來自引擎區(qū)塊的油并且減少了噪音。在伯明罕中展示的ISBe型發(fā)動(dòng)機(jī)擁有個(gè)Bosch普通軌條能源系統(tǒng)和ummins公司的核心電子管理系統(tǒng)這已經(jīng)應(yīng)用在Cummins公司的較大型的柴油機(jī)上如Signature600及ISM型柴油機(jī)。噴油嘴被垂直安置在燃燒室的中央，提高了燃料的燃燒效率。被發(fā)動(dòng)機(jī)的控制系統(tǒng)所掌握的可變的噴射時(shí)間提高了燃料在低發(fā)射水平的情況下的燃燒效^ISBe型發(fā)動(dòng)機(jī)的交互管理能力設(shè)計(jì)是為了保護(hù)發(fā)動(dòng)機(jī)和車輛提高運(yùn)轉(zhuǎn)能力增加正常運(yùn)轉(zhuǎn)時(shí)間以及改良操作性能。其包含了加速度率控制，速度限制，發(fā)動(dòng)機(jī)起步管辮流閥聯(lián)鎖起動(dòng)器聯(lián)鎖多工法，巡航控制和閑置轉(zhuǎn)矩控瓣卻離合器控制和PTO控制。可選擇的功能包含路電驛ummins公司的以Windows為基礎(chǔ)建立的交互式診斷和修護(hù)軟件以及行駛管理軟件。交互系統(tǒng)使用町1939類型的數(shù)據(jù)鏈，以接受來自發(fā)動(dòng)機(jī)各部件如：電子傳輸BS防抱死系統(tǒng)以及牽引控制等的數(shù)據(jù)輸，從而達(dá)到創(chuàng)立一個(gè)沿著數(shù)據(jù)鏈的暢通無阻的信息流的目的。不足為奇，（一些ins公司的附屬公司已經(jīng)開始著手研究新型的SBe發(fā)動(dòng)機(jī)，其主要涉及的方面包ftolsetWasteeegated渦輪增壓器及對機(jī)油、水、燃料及空氣的濾清裝置。在設(shè)計(jì)時(shí)應(yīng)使發(fā)動(dòng)機(jī)的前部不承擔(dān)結(jié)構(gòu)的負(fù)荷,前后的設(shè)計(jì)排洌應(yīng)將交流發(fā)電機(jī)和壓縮機(jī)布置在排氣裝置一邊以保持緊湊的結(jié)構(gòu)。六ISBe發(fā)動(dòng)機(jī)還擁有一個(gè)Poly-Vee型〃單一〃的皮帶自動(dòng)張緊裝置以提供高的耐久力。背部齒輪驅(qū)動(dòng)系統(tǒng)常用來從發(fā)動(dòng)機(jī)后部驅(qū)動(dòng)凸輪軸、燃料系統(tǒng)以及一些附件以減少發(fā)動(dòng)機(jī)的噪音。采用Olted-on結(jié)構(gòu)的鋁外殼是考慮到包裝的適應(yīng)性另外背部PTO選擇項(xiàng)也是可用的Cummins公司上述的。渦輪增壓的布置及附件的選擇通常是從為原始設(shè)備制造商提供安裝的適應(yīng)性的方面設(shè)計(jì)的。特殊的選擇包括了頭尾的機(jī)油供給裝置及一個(gè)封閉的曲柄軸箱通風(fēng)系統(tǒng)（CCV）。連同ISBe一起Cummins公司也介紹了ISCe型柴油機(jī)，這是一種從Cummins公司的C型發(fā)動(dòng)機(jī)發(fā)展起來的產(chǎn)品ISCe型柴油機(jī)包括了225、260、300馬力三種。它是由Cummins公司在Darlington的歐洲技術(shù)中心優(yōu)化符合歐3標(biāo)準(zhǔn)的發(fā)動(dòng)機(jī)以適應(yīng)歐洲司機(jī)的各種要:求Cummins公司上述的。ISCe型發(fā)動(dòng)機(jī)明確地被設(shè)計(jì)為適合范圍廣泛的特制車輛包括市政的車輛消防車拌機(jī)公共汽車和長途汽車。巧妙的電子控制使得發(fā)動(dòng)機(jī)能夠按步驟精確的完成工作循環(huán)以及操作上的穩(wěn)定依照Cummins公司如是說。ISCe型發(fā)動(dòng)機(jī)也爨了Cummins公司的蓄電池系統(tǒng)以及燃系統(tǒng)。依照Cummins公司的說法CAPS無論發(fā)動(dòng)機(jī)的速度為多少時(shí)均能提供高的噴射壓力提高百分之20的扭矩并育致良冷卻系統(tǒng)。另外CAPS技術(shù)還能夠使ISCe型柴油機(jī)在沒有排放再處理及RG裝置的情況下達(dá)到歐排放標(biāo)準(zhǔn)。ISCe發(fā)動(dòng)機(jī)也使用了核心電子管理系統(tǒng)。在裝備了CAPS及交互的電子系統(tǒng)后ISCe將能夠?yàn)閷淼臍W排放標(biāo)準(zhǔn)發(fā)動(dòng)機(jī)奠定一個(gè)理論基礎(chǔ)Cummins公司說。ISCe型發(fā)動(dòng)機(jī)使用了雙重的耐蝕鎳活的了改良放氣引擎配備了一個(gè)單一的4個(gè)氣門組成的一根高耐磨、高強(qiáng)度的鑄鐵凸輪軸。凸輪軸連接了一個(gè)新型的低價(jià)汽門系機(jī)構(gòu)設(shè)計(jì)，使得發(fā)動(dòng)機(jī)在氣門需前能夠連續(xù)運(yùn)轉(zhuǎn)150,000。區(qū)塊的設(shè)計(jì)是為了提供最大的強(qiáng)度及組合為完整的流線機(jī)架。承擔(dān)重任的構(gòu)件，例如有專利權(quán)的中部障礙物沾濕汽缸套能夠很容易被更換甚至在兩秒或是三秒鐘的時(shí)間內(nèi)。發(fā)動(dòng)機(jī)過濾和冷卻系統(tǒng)把一次加油運(yùn)轉(zhuǎn)時(shí)間延長為行映0里。巧妙的電子控制系統(tǒng)也改良了PTO負(fù)載控制精度Cummins公司上述道。改I的低速轉(zhuǎn)矩意味音四能使發(fā)動(dòng)機(jī)在低速時(shí)可以更安靜、更高效的運(yùn)轉(zhuǎn)。附錄二：外文原文Dieselengine*--Cuinrnins^Corporationforthedesignof*theEuropeanmarketISBedieselengine;：#口叫1iancewith^the￡UBisinissionstandardm,no^EGR^and^exhaust*devicestodealththeEuropeanenginealliance(EEA),thefirst-generationproductsinEuropeitsdebut；Birminghainheldre.cently>'in^the-cnmmer.icialvehicleattheshow：,.CuiuminsCorporationshow'theworlditsadvancedproductionlinev?ithEijropeanstandardsISBe^dieselenginethatiridtides-3.91L,four-cylirider,-?WW'Z'Z—16valveengine_and,aJ5.9L,■six-dyUnder,*24valvemodels,i)othintendtoTepladgthecurrentEuropeanmarketBseriesdieselengine.n;c-alsodisplayed"atthesametimeit"sin1inethEU'standardsISCe*3■engine,itsnamein'theletter'e'thatthisoneisdesignedspecifically：fortheEijropeaninarket.EEAisinMav?199&Fnnciunc：次theestablishmentoftheir^coirpaniesby?CuinminSj<NHGlobal-二'-■VvVvvVvVvvVv--.-NVinthe^.eon()any*(fornier1ytheNewNetherlands-)-andIvecoofjointinvestmentcoirpany.Unionfocusedonthedevelopmentandproductionforabnewroadfromtopto'bottomofeaichi.nderL；用Ldieselengines，Kuinmirigclaimsthatthistypeofengine-(SpirpaniesinNorthArneri,^ahasnotyet*made.Theannouncementpartnersare■producing^heirownengines-,betweenthe^two■productsare'someTiiinordifferences.-'Ina-recentreportreleasedby-thedescriptionthatitsdifferentis^heTfirstbetweenl.heCumminsEngine<onpanyisrfa"Ging~themainhigh^ayvehic1euseandapplicationoftheele^tronid'engineControlCummin*'\companys^bretechnology.The*wholeEystein,alsousedinthe-1SM~and^600.-typeengine,itsdesignis*workingontheperformanceof■theeconomy,andsprayedautomatic*monitoringjandotherparametersoptimizedtoprovideenginestoJtheneedsofthedataand'thenecessary1Protection.^Thesehighl^#doirg>lexdynainic:1groupintermediatestage■oftheapplicationwillgivetheEuropeantruckandbusdriversprovide-+janiirportant*-value//JPetei1McDowell,Cummin?Europeancarcornmercial,corporatehviS'epresident*says,""ForthefirstapplicationoftheLSBeAndISCe-engine,theinteriTiediate*stage*of*theenginedriving*fores^pilotgroup■willhaveadvancedequipment^--atthesamatime,Lilcreasedpr□duotivityforCummin'■SAAAAAAAAAAA/alsoiimprovetheQoirpany?ste^hnology-fhasgreatbenefits.產(chǎn)3：9L,four-cylinderenginewiththe■ISBeRatedpowerfor135,150'and170horsepowerarefor'SBOCT*wwwwtospeed7-torqueoutputforthetine-sharing.*369*ft;lb.Tandtheoutputtorqueto4106and443ft-,lb.correspondingtothespeedforthe1200■/pointsand1600*to/points.5.9L,six^cylinderISBe'enginehas25(^horsepower-and185^22QareSAAAAAAA/'for2500tospeed/torqueoutputforthetiine-Eharing^516ft.,lb.>and^the^outputtorquetc516Tandr^05ft.lb.respectively1forthecorrespondinispeedTothe1200*/160Q'andpointsto^/-.points.Allofthesenew1enginedesigninEuropeandtheUnitedKingdomwillbeintheiGummin，smanufacturingworkshop.Massproductionshouldbeginnext*year,theCompanyannounced.Themainengines-and'conponentsLwi11安timefromtheEU..<uinminThisisalsotheseatofthe-EuropeanTechnalogy-*-Centre,toprovideengineperformancedevelopmentandtransportoftestequipment.Cuinminsinaccordance^withthe^oirpany^atypicalISBe?engineswillbeTisedinlargetrucks^,icanpull■25_tonslof'trailers,■small'andmedium-sizedbuses^full-lengthbu瓦foratotal■weightof7.5to18■tonsoftransportT*mi1itary*vehicles,etc.ThisenginedssignforthefutureoftheEU~4standardengine1ay?asolidtechnicalfoundation.'ThenewiSBsengineoffers*anumberofoperat.iona1convenienceMcDowell-said,'Thenewengineoffershighpowerandtorqueand-iicprovedfuelecrmGiny^remissionsin*theabsenceoffurther-treatmentandexhaustgas-recirculationDevice(3GR)tothecircumstancesofthetlireeEuropeanstandards.■■Otherprogressincludes-anincreaseoftheprecisionandteduceenginenoise^tonine-decibels,-andthereductionofTontinemaintenance,*theuse'of*standards*fornengineoil￡5^-it^istheTone-timeTefuelingtoextendthe'periodofuseon.'30,666"miles.IntheBseriesenginestomaintainthe筆口叫&仁七'sizeandlightweightionthet>asisiof^four-1inder'engine"for"S15.85pciund宴largerforthetypeof1O36'V35pounds')the*newangine-inorder-toTeducenoiseandvibration1willbestreamlinedshapewith■atrapezoidalstructureAssemble-astableoveralljandlayflowlines*and*removetheentireoutsldeofthehose,insteadoffora'cleandesign,toincreasethe.^oolingandlubricationandextendthelifeoftheengine.-FourCylinder,，普.9LoftheISBeengineoi1capacity1of13.74quartsj-andsix-cylinder,5.9■Lengineis2d；61■quartsoflubricatingoils.yetem?^；apacity.A^cassettetape^withthehigh-SEALpullsteelCrankshaft■very^dui'able,■connectedto^helink-with*anew*shapeof'thestructure,bowl-shapedchamberandthepistonringembeddedinthe-corros^.onresistanceofnickel.TheISBehigh-powerdieselenginecharacteristicsembodiedinitsVXAAAAAAXDetroitused^andirect'cooling■systeiiLi^^cker1oW^conserv:.ationstemwasdesignedtoadjusttheTvalvebeforethematterat-.east124j€&01intherunning,Cumniinssaid.Eachofthefour-cylinder'valve*eover,：."inel'udingtheoverallintakeofTokiandtwoexhaustmanifold1inordertoenhanceits-abilityto'adapttothearduoustask.?CylinderHeadalsoaddedathermostats,in^royingtheabilityto.^pntrolLthecoolingagent,*3；9LengineTvitha*8.98quart*tapa^ityofl.hePoolingsystem,andthebigenginehasa10；57quartPoolingsystemCapacity.Inordertoachievethepurposeof'reducingnoise,enginedesignof"theisolationof'theroofand-asubsidiaryofTingcovered.Anotherenginealsohasarubbergaskettobeabletoisola七日th日-dilfromtheengineblockandreducethe11noise."InBirminghaminthedisplay'oftheISBeengine-withaBosch'.comnuon-rai1systemXAAAAXWVandhCLiinniins-oftheenergy*coirpany1s'coreelectronicmanagementsystem,?whichWXAAAAAAAAAXWhasbeenusedinthelargerCumminsdieselengines,suchastheSignature600*—WWXAAAAAAAAAX-'-and-theISMdiesel-engine.Nozzle*-was*placed*inthe*vertrealchamberoftheCentral-andimprove^he'effi^iencyofrfuel'burning,^as*theengine^control'system(ECM)TBastered'by'the'time'thevariablejetfuelincreasedin'low^einissionlevelofthe^oinbustianefficiency.ISBeengineinteract!on^irtanagementcapabilities-wwww——.Tr—^4=+.Tr—^4=+—?+l.r+■vcT■ttiNrI-ic+rL.n^cI■c,aincreasing-the"normalfunctioning',of"timeandiinproved-performance.It'contains■theaccelerationrate-control,,speedlimits,starttheenginemanagementandthrottlenchain,"starterinterlocking,multi-law,truisecontrol*and*idle"torquecontrol,^cooling*clut^hControlandPTOControl.Optionalfeaturesinclude*RoadRelaySj■Cummins^coiipaniestobuildWindows-basedinteractive*diagnostic-and-VAAAAAAAAAAAAA/repairsoftware,and*traffic,managementsoftware.SAEJ1939interactivesystemusesa*typeofdata1inkedtoaoceptfromengineComponentssuchas:electrcni'c?transmission,ABSanti-locksystemandtraction1eontr□1/■andsothedatainputtoachievethetreationofadataalongthek.chainofuninterruptedflow-*ofinfprmaticin占方戚.Notsurprisingly,someof'the^onpany,asubsidiary□f'CuirniiriFhas■begim-to^study■then日說ISBelengine,-anditsmain-aspects,includingtheHolset—-SAAAAAAA/—"■*「—VAAAAAAAAAAA/Wast^Ejegatedturbochargerandoil,*water,.*fuelandairfiltrationdevices.Inthedesignoftheengineso*that?whenthefrontof-theTstrueturedoesmot-bear'theload,'beforeandaftertheexchangeshouldbedesigned^withgeneratorsandcompressorslayoutintheexhaustsidetomaintainatightstructure.Six-cylinderISBeenginealsohasaPoly-Vee^single^beltautoniati.callytensioningdevicetoprovidehighdurability.-Ba^kgear'drivesystemmsedtodrivetheTearshaftfromtheengine；.',fuelsystemandsomeanneXjtoreduceenginenoise.Bolted-onuseofaluminuiReasingistakenintoajc-counttheadaptability*ofpackaging,andisalsobackPCOoptionsavailable,■Ci.iniminsCorporationoftheabove.Turbochargerlayoutandthe'choi-ceisusuallyannex■fromtheoriginalequipmentmanufacturerstoprovidetheinstallationofadaptiveaspe.cts-ofthedesign.Theoptions■includeaspecialTouweitheoil_VWXAAAAAAAAXsupplyinstallationsandaclosedr\：rankaxle*boxventilationsystem(CCV).-Together*withtheISBe,*CuinminsISCe-coinopany'alsointroducedthe*dieselengine,-WWWWWWWWWWW■—irkiir-Viic*3r-nrriY^snv*fvnni■+kiqi，-，iittittiincno「一Ti=iWi=i1nnHnrliir+c*T4「口一HcvwuzriAU口v：intheoptimization-oftheEuropeanTechno1ogy*CentreinlinewithEuropeanstandardsofthe■thi'eeengines,tomeet■therequirementsofEuropeandrivers,Cuinmins*C.orporationoftheabove.ISC日enginesspecificallydesignedtofit■a'widerangeofspecial^vehieleSjincludingrnLinicipal''vehicleSjfireengines^.,mixingmachines^busandcoach.'Cleverelectron!c?gontr□1engineable*tomakeprecise-steps^to■coirpleteitsworkr?ycle^andioperational^stability^*ina^ordancEwiththe■Cumminscoirpanysaid.ISCe-based*CumminsEnginealsoinstalledthewwwwwwwwwwwwwwwwwwwwwwwwcoircanysbatterysystem1andfuelsystem.In*aaciordancewith,CumminssaidtheWXAAAAAAAAAAXVJeoinpany;<APSregardlessofthenumberofenginespeed^vhen^thejetcan'providehigh-pressure,-c：an