Modern diesel engines are seeing increasing system and after-treatment complexity which can lead to significant increases in the exhaust back pressure (EBP). This increases the amount of trapped residuals, raising the charge temperature but reducing the oxygen concentration. In this work, these effects of the EBP on diesel engine performance and emissions under conventional and low-temperature diesel combustion (LTC) regimes were investigated.
Increasing the EBP resulted in higher pumping work for both combustion modes. While for conventional diesel combustion the effect of the EBP on combustion and emissions were not significant, for LTC the higher back pressures influenced the combustion and emissions formation processes. At low-load conditions, the increase in the charge temperature advanced combustion; at intermediate-load conditions, the reduction in the oxygen concentration delayed it. Smoke emissions were significantly reduced by a higher back pressure at intermediate-load conditions.
AkihamaK.TakatoriY.InagakiK.SasakiS.DeanA.M.Mechanism of the smokeless rich diesel combustion by reducing temperature. SAE paper 2001-01-0655, 2001.
2.
AlrikssonM.DenbrattI. G.Low temperature combustion in a heavy duty diesel engine using high levels of EGR. SAE paper 2006-01-0075, 2006.
3.
OgawaH.LiT.MiyamotoN.Characteristics of low temperature and low oxygen diesel combustion with ultra-high exhaust gas recirculation. Int. J. Engine Res., 2007, 8(4), 365–378. DOI: 10.1243/14680874JER00607.
4.
BeatriceC.AvolioG.GuidoC.Experimental analysis of the operating parameter influence on the application of low temperature combustion in the modern diesel engines. SAE paper 2007-01-1839, 2007.
5.
LiT.OgawaH.Regulated emissions and speciated hydrocarbons from smokeless low-temperature combustion diesel engines with ultra-high exhaust gas recirculation and exhaust oxidation catalyst. Proc. IMechE, Part D: J. Automobile Engineering, 2009, 223(5), 673–683 DOI: 10.1243/09544070JAUTO1047.
6.
CongS.McTaggart-CowanG.P.GarnerC.P.Effects of fuel injection parameters on low temperature diesel combustion stability. SAE paper 2010-01-0611, 2010.
7.
YunH.SellnauM.MilovanovicN.ZuelchS.Development of premixed low-temperature diesel combustion in a HSDI diesel engine. SAE paper 2008-01-0639, 2008.
8.
LadommatosN.AbdelhalimS.ZhaoH.The effects of exhaust gas recirculation on diesel combustion and emissions. Int. J. Engine Res., 2000, 1(1), 107–126. DOI: 10.1243/1468087001545290.
9.
LadommatosN.AbdelhalimS.ZhaoH.Effects of exhaust gas recirculation temperature on diesel engine combustion and emissions. Proc. IMechE, Part D: J. Automobile Engineering, 1998, 212(6), 479–500. DOI: 10.1243/0954407981526127.
10.
HountalasD. T.MavropoulosG. C.BinderK. B.Effect of exhaust gas recirculation (EGR) temperature for various EGR rates on heavy duty DI diesel engine performance and emissions. Energy, 2008, 33, 272–283.
11.
AngrillO.GeitlingerH.StreibelT.SuntzR.BockhornH.Influence of exhaust gas recirculation on soot formation in diffusion flames’Proc. Combust. Inst.2000, 28, 2643–2649.
12.
Al-QurashiK.BoehmanA.L.Impact of exhaust gas recirculation (EGR) on the oxidative reactivity of diesel engine soot. Combust. Flame, 2008, 155, 675–695.
13.
YunH.ReitzR.Combustion optimization in the low-temperature diesel combustion regime. Int. J. Engine Res., 2005, 6(5), 513–524. DOI 10.1243/146808705X30576.
14.
KunteS.BertolaA.ObrechtP.BoulouchosK.Temporal soot evolution and diesel engine combustion: Influence of fuel composition, injection parameters, and exhaust gas recirculation’Int. J. Engine Res.2006, 7(6), 459–470. DOI: 10.1243/14680874JER01006.
15.
TreeD. R.SvenssonK. I.Soot processes in compression ignition engines’Prog. Energy Combust. Sci., 2007, 33, 272–309.
16.
MurataY.KusakaJ.OdakaM.DaishoY.KawanoD.SuzukiH.IshiiH.GotoY.Emissions suppression mechanism of premixed diesel combustion with variable valve timing’Int. J. Engine Res., 2007, 8(5), 415–428. DOI: 10.1243/14680874JER01007.
17.
MurataY.NishioY.KusakaJ.DaishoD.KawanoD.SuzukiH.IshiiH.GotoY.Numerical analysis of Miller-premixed charge compression ignition combustion on a dynamic φ—T map’Int. J. Engine Res., 2010, 11(2), 89–98. DOI: 10.1243/14680874JER05709.
18.
HasegawaR.YanagiharaH.HCCI combustion in DI diesel engine. SAE paper 2003-01-0745, 2003.
19.
GaneshD.NagarajanG.Homogeneous charge compression ignition (HCCI) combustion of diesel fuel with external mixture formation.’Energy35, 148–157.
20.
KimM. Y.LeeC.S.Effect of a narrow fuel spray angle and a dual injection configuration on the improvement of exhaust emissions in a HCCI diesel engine.’Fuel86, 2871–2880.
21.
NaidjaA.KrishnaC. R.ButcherT.MahajanD.Cool flame partial oxidation and its role in combustion and reforming of fuels for fuel cell systems’Prog. Energy Combust. Sci.2003, 29, 155–191.
22.
Al-HamamreZ.TrimisD.Investigation of the intermediate oxidation regime of diesel fuel’Combust. Flame2009, 156, 1791–1798.
23.
CongS.McTaggart-CowanG. P.GarnerC. P.Measurement of residual gas fraction in a single cylinder HSDI diesel engine through skip-firing. SAE paper 2009-01-1961, 2009.
24.
MilloF.FerraroC. V.BernardiM. G.BarberoS.PaseroP.Experimental and computational analysis of different EGR systems for a common rail passenger car diesel engine. SAE paper 2009-01-0672, 2009.
25.
VitekO.MacekJ.PolasekM.SchmerbeckS.KammerdienerT.Comparison of different EGR solutions. SAE paper 2008-01-0206, 2008.
26.
WirojsakunchaiE.SchroederE.KolodziejC.FosterD. E.SchmidtN.RootT.KawaiT.SugaT.NeviusT.KusakaT.Detailed diesel exhaust particulate characterization and real-time DPF filtration efficiency measurements during PM filling process. SAE paper 2007-01-0320, 2007.
27.
MasoudiM.ZinkU.ThenP.CashT.ThompsonD.HeibelA.Predicting pressure drop of wall-flow diesel particulate filters - theory and experiment. SAE paper 2000-01-0184, 2000.
28.
HountalasD.T.KatsanosC. O.LamarisV. T.Recovering energy from the diesel engine exhaust using mechanical and electrical turbocompounding. SAE paper 2007-01-1563, 2007.
29.
HierethH.PrenningerP.Charging of the internal combustion engine, 2007 (Springer Vienna).
30.
WangY.Introduction to engine valvetrains, 2006(SAE International, Warrendale, Pennsylvania).
31.
HeywoodJ. B.Internal combustion engines fundamentals, 1988 (McGraw-Hill, New York).
32.
CongS.McTaggart-CowanG.P.GarnerC.P.The effects of exhaust back pressure on conventional and low temperature diesel combustion. In Internal combustion engines: performance, fuel economy and emissions, Proceedings of the IMechE Conference, London, UK, 8–9 December 2009, pp. 215–225 (Chandos Publishing, Abington, Cambridge).
33.
PickettL. M.SiebersD. L.Soot in diesel fuel jets: Effects of ambient temperature, ambient density, and injection pressure’Combust. Flame, 2004, 138, 114–135.
34.
BeatriceC.AvolioG.BertoliC.Del GiacomoN.GuidoC.MigliaccioM.Critical aspects on the control in the low temperature combustion systems for high performance DI diesel engines’Oil Gas Sci. Technol.2007, 62471–482.
