路虎發(fā)動機介紹課件

路虎發(fā)動機介紹RangeRoverSport路虎發(fā)動機介紹

動力總成

V8自然吸氣/機械增壓發(fā)動機

學員手冊第8部分第5–71頁

由中汽南方蔣鳳石翻譯路虎發(fā)動機介紹Powertrain

V8EnginesN/AandS/C

Workbooksection8Pages5–71

路虎發(fā)動機介紹目的

(動力傳遞部分)

注意：本課程與另外一門課程（Denso發(fā)動機管理系統(tǒng)）共同組成發(fā)動機部分 的完整介紹。描述4.4NA和4.2SC發(fā)動機的結構特性介紹各種發(fā)動機技術參數(shù)按照路虎公司政策進行發(fā)動機維修正確使用專用工具

路虎發(fā)動機介紹Objectives(Powertrain)

Note:thiscourseisdesignedtorunalongsidetheDensoEnginemanagementtrainingprogrammeDescribetheFeaturesofthenaturallyaspirated4.4litreandthe4.2litresuperchargedengineDescribethetechnicalspecificationforallenginesCarryoutenginerepairsinlinewithLandRover’sPolicyUsespecialtoolscorrectly.

路虎發(fā)動機介紹概述Page9路虎發(fā)動機介紹GeneralPage9路虎發(fā)動機介紹V8汽油機90°V型鋁制缸體鋁制汽缸蓋–每缸4氣門無墊片，挺桿直接作用可變氣門正時(VVT)–機械增壓版上未安裝初級、次級鏈式驅動

鋁制缸床(階梯型結構)碎裂式連桿兩根V型驅動皮帶電控EGR(機械增壓版未裝)引入機械增壓在Bridgend的發(fā)動機廠組裝Page9路虎發(fā)動機介紹V8PetrolEngine90°VeeAluminiumcylinderblockAluminiumcylinderheads-FourvalvespercylinderShim-less,tappetbucketsVariablevalvetiming(VVT)–notonsuperchargerPrimaryandsecondarychaindrivesAluminiumbedplate(ladderframe)FracturesplitconnectingrodsTwinmulti-veedrivebeltsElectronicEGR(noEGRonsupercharger)SuperchargerintroducedBuiltattheBridgendengineplant.Page9路虎發(fā)動機介紹BaseEngineAJ-41V8NA發(fā)動機是AJ-33V8NA的改良版新型AJ-41/43V8發(fā)動機將投放所有市場變更要點：深式油底殼修正FEAD(發(fā)動機驅動風扇)排放標準達到歐4US–LEVII修正EGR15,000英里機油保養(yǎng)(歐洲),7,500英里換機油(美國)無回油管路系統(tǒng)修正冷卻水出口控制(throttletodifferentsideofvehicle)無墊片路虎發(fā)動機介紹BaseEngineAJ-41V8NAEngineismodifiedversionofAJ-33V8NAThenewAJ-41/43V8willbelaunchedintoallmarkets.KeyV8enginechangesovertheJaguarversion:-DeepSumpRevisedFEAD(enginedrivenfan)TailpipeemissionsEurope&ROW–Stage4US–LEVIIRevisedExhaustGasRecirculation(EGR)15,000MileOilService(Europe),7,500milesoilchangeinUSAReturnlessFuelSystemRevisedwateroutlet(throttletodifferentsideofvehicle)Shim-lesstappets.路虎發(fā)動機介紹AJ41V8NA發(fā)動機線束加油管高度增加改進的缸蓋改良水套排氣歧管缸床深式油底殼初級FEAD皮帶具有濾清的油冷卻器次級發(fā)動機前發(fā)動機輔助驅動皮帶（FEAD）改進的節(jié)溫器支架以適應節(jié)氣門節(jié)氣門體發(fā)動機罩蓋安裝支架路虎發(fā)動機介紹AJ41V8NAEngineHarnessOilFilltube,HeightincreasedModifiedCylinderHead,improvedportsandwaterjacketFabricatedLogExhaustManifoldsStructuralbedplateDeepsumpPrimaryFEADdriveOilCoolerwithfilterheadSecondFEADdriveModifiedThermostathousingtosuitthrottleelbowThrottleBodyandelbowEnginecovermountingbrackets路虎發(fā)動機介紹AJ41V8NA修正的EGR管變矩器連接處起動機路虎發(fā)動機介紹AJ41V8NARevisedEGRpipeTorqueconverteraccessStarterMotor路虎發(fā)動機介紹功率/扭矩數(shù)據(jù)L319-L320-L322發(fā)動機型號車輛發(fā)動機排量發(fā)動機扭矩發(fā)動機功率KolnV6L3194.0.na360Nm3000rpm160kW4500rpm269lbft(365Nm)3000rpm216bhp(161.3kW)4500rpmAJ41L319&L3204.4.na425Nm4000rpm220kW5500rpm315lbft(427.3Nm)4000rpm300bhp(223.7kW)5500rpmAJ42L3224.4.na440Nm4000rpm225kW5750rpm325lbft(44o.8Nm)4000rpm305bhp(227.4kW)5750rpmAJ43L3204.2.sc550Nm3500rpm287kW5750rpm410lbft(555.5Nm)3500rpm390bhp(290.8kW)5750rpmAJ44L3224.2.sc560Nm3500rpm291kW5750rpm420lbft(569Nm)3500rpm400bhp(298.2kW)5750rpm路虎發(fā)動機介紹Power/TorqueFiguresL319-L320-L322EngineDerivativeVehicleEngineccEngineTorqueEnginePowerKolnV6L3194.0.na360Nm3000rpm160kW4500rpm269lbft(365Nm)3000rpm216bhp(161.3kW)4500rpmAJ41L319&L3204.4.na425Nm4000rpm220kW5500rpm315lbft(427.3Nm)4000rpm300bhp(223.7kW)5500rpmAJ42L3224.4.na440Nm4000rpm225kW5750rpm325lbft(44o.8Nm)4000rpm305bhp(227.4kW)5750rpmAJ43L3204.2.sc550Nm3500rpm287kW5750rpm410lbft(555.5Nm)3500rpm390bhp(290.8kW)5750rpmAJ44L3224.2.sc560Nm3500rpm291kW5750rpm420lbft(569Nm)3500rpm400bhp(298.2kW)5750rpm路虎發(fā)動機介紹缸體

鑄鋁中缸，干式的鋼質(zhì)氣缸內(nèi)襯套，和4.4LNA發(fā)動機類似。

缸徑尺寸由88mm改為86mm

機械增壓款發(fā)動機加裝了活塞機油噴射冷卻裝置。（在主油道上裝有放油口，噴射冷卻裝置通過螺紋擰緊到放油口上。）該噴油裝置位于活塞冠部下方。共四個噴油裝置，每個有兩個噴嘴。在4.4LNA發(fā)動機上的放油口沒有精加工（因為沒有必要使用機油噴射冷卻裝置）。Page14路虎發(fā)動機介紹CylinderBlock

Aluminiumcastingwithirondrylinerssimilarto4.4LNA;

Cylinderboresizeis86mminsteadof88mmPistoncoolingjetsareboltedintotapingsintothemainoilgallery–directedattheundersideofpistoncrown.Fourjetseachhavetwonozzles.Tapingsareleftunmachinedfor4.4LNA.Page14路虎發(fā)動機介紹缸號/發(fā)動機數(shù)據(jù)*SLHPT*CBBC**22222211* *KMKMK*0008230756曲軸軸頸等級曲軸曲柄銷等級缸鏜等級日期/時間曲軸軸承孔發(fā)動機數(shù)據(jù)–左側Page15路虎發(fā)動機介紹Cylindernumbering/enginedata*SLHPT*CBBC**22222211* *KMKMK*0008230756MaincrankshaftjournalgradesCrankshaftpinGradesCylinderboreGradesDate/timeMainCrankboresEnginedata–lefthandsidePage15路虎發(fā)動機介紹發(fā)動機數(shù)據(jù)–3個位置發(fā)動機缸體上有兩個

另外一個在發(fā)動機前蓋上如0408232319AA04=年08=月份23=日期2319=時間AA=自然進氣SA=機械增壓路虎發(fā)動機介紹EngineData–3Locations

TwolocationsoncylinderblockOneonenginefrontcoverExampleofcoding0408232319AA04=200408=August23=Day2319=TimeAA=NaturallyAspiratedSA=Supercharged路虎發(fā)動機介紹曲軸活塞鑄造深式活塞

(壓縮比9.1:1)，活塞銷22mm(NA發(fā)動機21mm)活塞銷固定卡簧和連桿小端軸承設計和4.4LNA發(fā)動機一樣

例如活塞銷在飛濺潤滑的銅套中浮動和4.4LNA發(fā)動機一樣鏜缸有三個等級可靠的油環(huán)（最底端的活塞環(huán)）控制

(4.4LNA發(fā)動機是相互分離的三活塞環(huán)設計).連桿22mm的連桿銷直徑與4.4LNA發(fā)動機不同；將來會有兩個連桿供應商，標記符號方面可能會有不同。曲軸、曲軸軸承、連桿大頭軸承

與NA發(fā)動機相同

(90.3mm行程)Page16路虎發(fā)動機介紹CrankshaftPistonsForgeddeepdishpiston(CR9.1:1)with22mmpindiameter.(21mmforNA)Designofpistonpinretention(circlips)andlittle-endbearingsameas4.4LNA i.e.floatingpininsplash-fedbronzebush.Threegradesas4.4LNA.Solidoilcontrol(bottom)ring(4.4LNAisthreepiecesegmented).ConrodsDifferentto4.4LNAdueto22mmpindiameter.(Tworodsuppliersinfuture–transparenttoservicebutsomemarkingsmaydiffer).Crank,MainandBig-EndBearings,SameasNAengine(90.3Stroke)Page16路虎發(fā)動機介紹汽缸蓋鑄造、加工及組裝同4.4L自然進氣式包括閥座、氣門導桿、凸輪軸蓋及油堵頭(AvdelPlugs)注意：對于機械增壓發(fā)動機，每個缸蓋均需一個額外的油堵頭以堵住未用的VVT出油口。氣門、氣門彈簧、氣門瑣銷同4.4L自然進氣式凸輪軸不同的進、排凸輪軸，SC發(fā)動機氣門疊開角度更小，對正時可采用相同的凸輪軸固定工具。路虎發(fā)動機介紹CylinderHeadsHeadCastingandMachining&SubAssemblySameas4.4LNAIncludesvalveseatsandguides,camcaps,galleryplugs(AvdelPlugs)NB:OneextraAvdelplugisrequiredperheadtoblankoffVVTfeedValves,springs,colletsSameas4.4LNACamshaftsDifferentintakeandexhaustcams.Durationandtiming(lessoverlapforSCengine).Timingflatspositionedappropriatelysosameservicetoolsusedfortiming.路虎發(fā)動機介紹4.2.SC正時鏈/齒調(diào)整上圖為不帶VVC裝置的4.2SC正時鏈調(diào)整下圖為4.4N/A帶有VVC裝置的正時調(diào)整路虎發(fā)動機介紹4.2.SCTimingChain/GearArrangementTopimageshows4.2SCgeararrangementwithnoVVCLowerimageshows4.4N/AgeararrangementwithVVC路虎發(fā)動機介紹4.2.SC正時鏈/齒調(diào)整上圖為4.2SC不帶VVC裝置的正時調(diào)整注意：沒有安裝VVC裝置的汽缸蓋上供油孔是空的。下圖是4.4N/A帶有VVC裝置的正時調(diào)整注意到VVC裝置的油孔是清晰可見的注意點：當安裝4.2SC發(fā)動機新的缸蓋時確保油口堵死。路虎發(fā)動機介紹4.2.SCTimingChain/GearArrangementTopimageshows4.2SCgeararrangementwithnoVVCNote:oilfeedincylinderheadisblankedoffasnoVVChousingisfittedLowerimageshows4.4N/AgeararrangementwithVVCNoteoilfeedtoVVChousingisclearlyvisibleCarepoint!Whenfittingnewcylinderheadto4.2SCenginemakesureredundantoilfeedgalleryispluggedtopreventlossofoilpressureandoilstarvationtocylinderheadcomponents路虎發(fā)動機介紹4.2.SC正時鏈/齒調(diào)整路虎發(fā)動機介紹4.2.SCTimingChain/GearArrangement路虎發(fā)動機介紹凸輪軸鏈條驅動鏈條驅動此系統(tǒng)全部與4.4LNA相同。兩個主鏈條驅動每邊的進氣凸輪軸，排氣凸輪軸由進氣凸輪軸通過次級驅動鏈驅動，液壓漲緊器全時使用。對正時步驟同Discovery3/LR3可變凸輪軸正時

(部件安裝于進氣凸輪軸)沒有安裝在SC發(fā)動機上(很可能安裝在MY07上)進氣凸輪軸為普通鏈輪齒刪除VVT供油支架及電磁閥缸蓋油道供油需要用油堵（Avdelplug）堵??！此操作在維修時需要特別注意?。?！Page29路虎發(fā)動機介紹CamshaftChainDriveChainDriveSameoverallsystemas4.4LNA.Twomainchainsdriveinletcamsforeachbank.Exhaustcamsthendrivenfromeachintakecamwithsmallsecondarychains.Hydraulictensionersusedthroughout.TimingprocessidenticaltoDiscovery3/LR3VariableCamshaftTiming(unitonintakecams)NOTfittedtoSCengines.(ButislikelytocomeinforMY07)Intakecamshaftsprocketsarethereforeconventional“disc”sprocket.VVToilfeed“spider”bracketandsolenoidunitthereforedeleted.OilfeedfromcylinderheadgalleryrequiresblankingoffwithAvdelplug.Thisoperationwillberequiredinservice?Page29路虎發(fā)動機介紹4.2SC發(fā)動機特點汽缸內(nèi)徑由

88mm減少到86mm活塞冷卻噴嘴鑄造活塞/新型油環(huán)新型連桿新型凸輪軸無VVT裝置-新型凸輪軸蓋空氣進入中冷器

–具有獨立的冷卻回路無EGR路虎發(fā)動機介紹Featuresfor4.2SCengineBoresizereducedfrom88mmto86mmPistoncoolingjetsForgedpistons/newoilcontrolringNewconnectingrodsNewcamshaftsNoVariableValveTiming-NewcamshaftcoversAirtowaterintercoolers–withseparatecoolingcircuitNoEGR路虎發(fā)動機介紹其他詳細差異： -RFIsuppressor–安裝在B-Bank中冷器后部 -美觀降噪塑料蓋板–中冷器上有長的固定螺栓 -凈化系統(tǒng)，碳罐電磁閥安裝在外殼支架上

-在“眼鏡蛇”進氣管的下方有一個控制噪音的黑色T型塑料袋（內(nèi)裝降噪材料）

-無EGR

-凸輪軸蓋

如果部件或系統(tǒng)沒有提及，則為相同的，主要有：點火系統(tǒng)(火花塞和點火線圈)發(fā)動機支架及固定螺栓正時鏈條蓋潤滑系統(tǒng)(油底殼、集濾器、機油泵、機油尺、管路等)細節(jié)

/共同性路虎發(fā)動機介紹Otherdetaildifferences; -RFIsuppressor–mountedatrearofB-Bankintercooler -Stylingcovermountings–longpillarstudsfittedtointercoolers -Purgesystem.Purgevalvemountstobracketonbellhousing -NVH“stuffer”undercobraduct(BlackT-shapedpad). -NoEGR -CamshaftcoversIfapart/systemhasn’tbeenmentionedyetthenitiscommon.Theseinclude;Ignitionsystem(Sparkplugsandcoils)EnginemountingbracketsandboltsChaindrivecoverLubricationsystem(sump,oilpickup,oilpump,dipstickandtube).Details/Commonalities路虎發(fā)動機介紹路虎發(fā)動機介紹機械增壓Supplier-EatonModel-M112-4H336F066BAPerformancegainapprox60KW(80HP)0.8barinletpressure(gauge)1.8barabsolutePage37路虎發(fā)動機介紹SuperchargingSupplier-EatonModel-M112-4H336F066BAPerformancegainapprox60KW(80HP)0.8barinletpressure(gauge)1.8barabsolutePage37路虎發(fā)動機介紹機械增壓發(fā)動機動力取決于可消耗的空氣量

通常方法是靠大氣壓力提供發(fā)動機進氣

如果空氣在高壓情況下進入汽缸就可以獲得更多的進氣量，這就是：

機械增壓Page38路虎發(fā)動機介紹SuperchargingPoweroftheenginedependsuponmassofairitcanconsumeNormalmethodallowsatmospheretoforceairintotheengineIftheairisforcedintocylindersunderpressurehigherthanatmospheric, agreatermassofairwillenterthecylinderandtheenginewillbe:SuperchargedPage38路虎發(fā)動機介紹中冷器經(jīng)過增壓單元壓縮后進氣溫度通常超過160℃每側都有單獨的水冷空氣散熱器。這種近距離的小體積散熱器有利于減小“增壓延遲現(xiàn)象”。為獲得最大的冷卻效果，中冷器冷卻回路與發(fā)動機冷卻水路是分開的

(中冷器冷卻有自己的水泵，是獨立的回路)氣流由上部大出口流出，分成A、B兩部分支流，然后通過兩個喉管再進入各自的中冷器。路虎發(fā)動機介紹IntercoolersAftercompressioninthesuperchargerunit,theintakeairtemperatureoftenexceeds160degreesC.Separateairtowaterheatexchangermatricesforeachbank.Closecoupledsmallvolumeheatexchangersminimiseboost“l(fā)ag”.Coolingcircuitforintercoolersisseparatetoenginesystemforgreatestcoolingeffect.(Separatepumpedcircuit)Airflowexitssuperchargerfromonelargeportontopsurface–flowthendivergesintoA-bankandB-bankstreams(“wingduct”)beforeenteringeachintercooler.路虎發(fā)動機介紹分解圖驅動齒輪齒輪外科/油底殼

葉片驅動皮帶輪支撐軸承構造:輸入軸路虎發(fā)動機介紹ExplodedViewGeardriveGearhousing/sumpVanesDrivepulleySupportbearingConstruction:Inputshaft路虎發(fā)動機介紹機械增壓路虎發(fā)動機介紹Supercharger路虎發(fā)動機介紹機械增壓組成:轉子安裝于鋼軸上軸在前部滾子軸承上運轉（后部為滾針軸承）螺旋齒被壓向前部鋼軸螺旋齒輪由潤滑油密封

(油池,全合成潤滑油)不要進行維修驅動皮帶盤安裝在鋼軸上，與斜齒輪柔性耦合連接

路虎發(fā)動機介紹SuperchargerAssembly:TherotorsaremountedonsteelshaftsTheshaftsrunonbearings(needlerollerrear)deepgrooveballbearingfrontHelicalgearsarepressedontothefrontofthesteelshaftsThehelicalgearsarelubricated(oilbath,fullysyntheticPTFEbased)sealedforlifeDONOTTOPUPINSERVICEDrivepulleyismountedonthesteelshaftandisconnectedtothedriverhelicalgearviaatorsionsoftcoupling

路虎發(fā)動機介紹機械增壓器路虎發(fā)動機介紹Supercharger路虎發(fā)動機介紹機械增壓中冷器機械增壓節(jié)氣門體旁通閥機械增壓系統(tǒng)路虎發(fā)動機介紹IntercoolerSuperchargerThrottlebodyBy-passvalveSuperchargedSystem路虎發(fā)動機介紹中冷器水冷鋁制結構每側一個

連接水管來自機械增壓Page39路虎發(fā)動機介紹IntercoolerWatercooledAluminiumconstruction1Perbank

WaterconnectionsFromsuperchargerPage39路虎發(fā)動機介紹中冷器散熱片管路實現(xiàn)氣液熱交換路虎發(fā)動機介紹IntercoolersFinandtubeair-to-liquidheatexchangers路虎發(fā)動機介紹

壓力控制閥進氣機械增壓壓力控制閥在機械增壓上利用旁通空氣控制壓力路虎發(fā)動機介紹

Pressurecontrolvalve

AirintakeSuperchargerPressurecontrolvalveBy-passesairtocontrolPressureinsupercharger路虎發(fā)動機介紹壓力控制閥真空操作旁通閥（真空管在節(jié)氣門體下游控制）怠速及巡航條件下旁通閥全開提供最大的旁通進氣量以獲得最佳的燃油經(jīng)濟性。當節(jié)氣門打開時旁通氣閥逐漸關閉以減少旁通氣流增加空氣供給壓力，從而獲得發(fā)動機的最佳動力輸出。Page40路虎發(fā)動機介紹PressurecontrolvalveVacuumoperatedbypassvalve.(Vacuumpipedownstreamofthrottlebodytoactuatorunit).IdleandmostcruiseconditionsthebypassvalveisfullyopentoprovidemaximumbypassandoptimumfueleconomyAsthethrottleopensthebypassvalveprogressivelyclosestoreducebypassflowandincreasethepressureoftheairsuppliedtotheengineforoptimumpoweroutput.Page40路虎發(fā)動機介紹旁通閥旁通閥真空閥閥連接路虎發(fā)動機介紹BypassvalveBypassvalveVacuumvalveValvelinkage路虎發(fā)動機介紹

壓力控制閥嚴禁在壓力控制閥不連接的情況下著車，否則將會導致嚴重的發(fā)動機損壞

這是因為機械增壓過熱、疲勞卡死，甚至達到疲勞極限注意:

如果在維修過程中壓力控制閥損壞，會導致發(fā)動機運轉時機械增壓嚴重的損壞真空閥路虎發(fā)動機介紹

Pressurecontrolvalve

NEVERRUNtheenginewiththepressurecontrolvalvedisconnectedotherwisesevereenginedamagewillresultThiswillcausethesuperchargertooverheatandseize,evenifrunningwasforalimitedperiodNote:IfpressurecontrolvalvefailsinserviceseriousdamageiscausedtothesuperchargerVacuumvalve路虎發(fā)動機介紹機械增壓維修密封部件-只能換件：機械增壓部件應該運轉自由-沒有明顯受限在發(fā)動機運轉情況下不要執(zhí)行以下操作：拆除驅動皮帶情況下檢測機械增壓拆卸真空管路虎發(fā)動機介紹SuperchargerServicingSealedcomponent-REPLACEMENTONLY:Thesuperchargershouldbefreerunning–withoutnoticeablerestrictionDonotconductanyofthefollowingwiththeenginerunningTestsuperchargerwithdrivebeltremovedDisconnectvacuumpipes路虎發(fā)動機介紹機械增壓診斷扭轉耦合:拆除任節(jié)氣門肘或機械增壓出口用手抑制轉子的運動（不要使用工具）無負載情況下用手旋轉驅動皮帶，原設計是大約30度注意:

這種運動是正常的并且可消除怠速異響路虎發(fā)動機介紹SuperchargerDiagnosticsTorsioncoupling:RemoveeitherthrottleelboworsuperchargeroutlethousingRestrainrotormovementwithhand(DONOTusetools)Rotatedrivepulleybyhand,approx30degreestotalmovementinunloadedconditionisthedesignconditionNote: Thismovementisnormalandisrequiredtoeliminateidlespeedgearchirp路虎發(fā)動機介紹機械增壓診斷路虎發(fā)動機介紹SuperchargerDiagnostics路虎發(fā)動機介紹機械增壓診斷外觀檢查：轉子具有明顯磨損（磨光）是可以接受的當磨掉特殊鍍層

(允許保持轉子和殼體最小間隙)時會看到磨光的情況嚴重劃痕情況，例如轉子上磨損可見鋁制材料是不可接受的

(不要與磨光混淆)嚴重的劃痕可能導致外物進入機械增壓路虎發(fā)動機介紹SuperchargerDiagnosticsGeneralVisualexamination:EvidenceofpolishingontherotorsisacceptableThisoccursasaresultofremovalofhighspotsofspecialcoating(thisallowsminimumclearancetobemaintainedbetweenrotorsandcasing)Heavyscoringi.e.Aluminiumbasematerialbecomesvisibleonrotorsisnotacceptable(donotconfusewithpolishing)Isolatedorrandomheavyscoringisgenerallyaresultofforeignbodyingressintothesupercharger路虎發(fā)動機介紹可變氣門正時工作原理油經(jīng)過三角支架總成進入各個VVT執(zhí)行器，三角支架總成包括VVT電磁閥、油道及正時鏈導向機構發(fā)動機管理系統(tǒng)通過安裝在三腳架頂部的電磁閥來控制凸輪軸的提前或滯后。Page45路虎發(fā)動機介紹VariableValvetimingOperatingprincipal

OilisfedtothefrontofeachVVTactuatorviathespiderbracketassemblywhichcontainstheVVTactuatorsolenoid,supplyoilgalleriesandtimingchainguide.Oilpressureadvancesandretardsthecamshafttimingwhichiscontrolledbytheenginemanagementsystemviaasolenoidvalvemountedinthetopoftheoilfeedspiderassembly.Page45路虎發(fā)動機介紹可變氣門正時凸輪軸正時Camshafttiming:依據(jù)發(fā)動機轉速、負載及油壓進行調(diào)整

Page46路虎發(fā)動機介紹VariableValvetimingCamshafttiming:dependantonenginespeed,loadandoiltemperature.Page46路虎發(fā)動機介紹SC發(fā)動機需要對機油進行外部風冷，從冷卻器供油回油到發(fā)動機油底殼前濾網(wǎng)的油道前部濾網(wǎng)包含一個溫度調(diào)節(jié)裝置，防止油溫低于103℃機濾Page49路虎發(fā)動機介紹SCenginerequiresexternalairblastoilcooler.Pipeworktofeedandreturnfromthiscoolerplumbsintotheengineoilgalleriesintheoilfilerhousingonthefrontofthesump.Thisfilterheadcontainsathermostaticvalvewhichpreventsoilflowbelow103degreesCoiltemp.OilFilterHeadPage49路虎發(fā)動機介紹路虎發(fā)動機介紹冷卻系統(tǒng)冷卻系統(tǒng)–Page53路虎發(fā)動機介紹CoolingCoolingSystems–Page53路虎發(fā)動機介紹S/C冷卻回路用水冷卻空氣此處連接使得層壓器冷卻水路和發(fā)動機冷去水路相連，但在系統(tǒng)工作時兩個水路的冷卻水是不互相傳熱（流通）的。通過BOSCH電子泵驅動，通過塑料支架和銷子安裝在散熱器邊側路虎發(fā)動機介紹S/CCoolantCircuitWaterchargeaircoolingVortexconnectiontotophose,providingsinglepointforfill/degasbutremainsthermallydecoupled.DrivenbyBoschelectricpump,mountedtoradiatorendtankwithpushfitplasticbracketandpin.ServicefillscrewinbrickfeedTpiece(deletedfrombricks)