现代柴油机技术_培训讲义_第一讲.

1、现代柴油机开发技术晦培训提纲第一讲：先进车用柴油机的过去、现状与发展趋势第二讲：现代柴油发动机正向开发流程、技术路线、开发手段 与工具第一讲：先进车用柴油机的过去、现状与发展趋势常恐誌汽油机与柴油机主要特征的对比y汽油机Sb坯油机（Cl）EF1.MPI. SPI.GDI, HCCIIDI.DI.HCCQ&sohne (narrow range Gt ttemmaMity. lambda 0.0 -Diesel (higher den&ey. lower octane number, hqher viscostfy. ela)iDkYitt殆籾 . ”内H20tw|Aik l60(bar). t

2、；J5t Y次11 内迪气方式NA. .i机i (Supenurtx) 小冷NA/V.t.ni）“fIM处川机鼻父用 VMT尺氏满伦IT 中飲I XiMU 川冷匕f*WJWT“ W川 WTanwmviS*KWTK代 ttt4itt5R用冷 1PEGRiL25% 6)e火力式Spirit ignded (SI), then fhme qrrte the rest (M rrulufeCompression igned (Cl| pre-infected lud bum simuiianeomly*4TKFlame propagation in the Homogenous nxituctTwo

3、stage combuslion: homoQenous combustion and cMfuwe conbustton9WK)l60bar (NA). .100 bar (turbo. 2 0 bar boo)-50kW L), “200 bar (tutx. 3D bar boost :lX-70kW L)JAAIIfi-850C INAl x950C (Turbo)700C(TiMt) JiavHSKc-l OXdiHiluin ； dUSa1 2. ft衣必机KrtMMh HCaMCO etmsionsHigh NOx and PM eonsUMffM3效債化帕（腋卩Q） 冷巔功拧制

4、UfthJDOC (WIN tOPf a”SCR rtLNT) #DPF Kt uoo xoz009019【】NOx conversion eniciency as a function of exhausttemperature is one of the most determining factors.岳袈 柴油机后处理系统的两种主要形式也主也NOx aftertreatmentPM aftertreatmentAdsorber catalystQon恸2ou*y Regeneratingeiectfv 3 创yc fieductw (SCR)Gesei Eacle Filter (CD

5、PF)PHASE 2 BrM enrlchmMt (ECU cenUoled)AFR1Redwctton of stood nltrtc oxidM： bacK formation of nitrato to NO ReacOon o NO with CO and H； (2NO 2CO T 2COb NJ (JNOZH,讥)AfR1 of NOm on cautyst turfac: Oxidation from NO to NOt Production of nitru (out ol 州O) storago of produced rWtnite胳麟SCRNOx转换装置工作原理After

6、treatment systems mode of operation Selective Catalytic Reduction (SCR)The SCR technology uses urva, respectively ammonia (which forms afterdecompoettion of urea at temperatures 200*C) to convert nltrte oxldet(NOt NOa Into harmless mol(cular nitrogen and water.MbT) uro/ammoni 、一丿InjectionNOn hydroge

7、n . x 4 NO O.*4 怙麟 组合式柴油机后处理装置工作原理Aftertreatment systems mode of operation Continuous” regenerating D/esel particle filterCombination of oxidation catalytic converter and soot trap2cog 2 co, 4HC*S0r 2HVO4CO2 2NO*Of 2NOtC2NOa CO2NOClosed“ SystemwOpen- Systeme.g. Particulate Catalyst(Metal)颗粒捕集器工作原理Di

8、esel Combustion System For 2007-2010Emission Control Systems DPFe.g. Particulate Filter as HoneycombWall Flow Filter (Cordierite, SiC,) High Filtration Efficiency ( 90%) Reduced Filtration Efficiency ( 50%) High Exhaust Back Pressure Low Exhaust Back Pressure岳豹誌SCR与DPF组合装置在柴油机上的应用m撕小The SCR and CDPF

9、 approachmlorcootorSCR cjUlyMlomporaturoMfKOTt* O0-UFM injtcliot)岳膵 几种柴油机后处理方式的优劣性对比 *仆小比妄醍 北美与欧洲关于柴油机后处理方式的技术路线关爱水桓20urea costs0.5 S/gallonMY2004MY2009 dual MY2007 High MY2007 SCR &Kg NSC EGR & CDPF CDPF 8 com of Go truck and tralac, M ol axchang0 cma included2015105 O-5-1O 【s】 e6ueJC0 一800 eoAO熬翳譬

10、豔翳翳翱来雌蚱周嫌“*The SCR & CDPF technology reduces fuel consumption and life cycle costa;the cost advantage depends on the urea costsurea costs1.0 S/gllon urM coats 1.5 Voillon低温燃烧技术豹誌低温燃烧(LTC)概念CT. VMM科拉创妫关爱水悝X低温燃烧可同时降低缸内碳烟与氮氧原井放；低温燃烧通过采用大最冷却EGR来实现：由于采用了大量冷却EGR来稀释缸内混合气，低温燃烧只适用 于发动机中低负荷；轿车用柴油机大部分时间只在部分负荷下

11、工作；”因此低温燃烧模式可以涵盖轿车用柴油机的大部分工作区域;全负荷运行条件下仍采用传统(0 EGR)燃烧模式。低温燃烧：同时降低缸内碳烟与氧化氮原排放的途径iculate1.0Nitric OxidesConventionalCombustion I RegimeLTC Combustion Regime2500100015002000Local Flame Temperature - K3000科損创心关爱水也某低温燃烧系统柴油机NOx与烟度原排放实测结果比免签 其他类型的低温燃烧系统：HCCIHCCI EngineChallenges:Proper air / fuel mixing Limited load rangeCo