不同海拔下egr对含氧燃料柴油机性能影响的试验研究

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1、不同海拔下EGR对含氧燃料柴油机性能影响的试验研究毕玉华1，刘伟1，申立中1，刘少华1，宋国富2，狄玉龙1(1昆明理工大学，云南省内燃机重点实验室，昆明650500;2昆明云内动力股份有限公司，昆明650500)ThestudyoninfluenceofEGRondieselenginefueledoxygenatedfuelperformanceunderdifferentaltitudesBIYuhua1，LIUWei1，SHENLizhong1，LIUShaohua1，SONGGuofu2，DIYulong1(1YunnanProvincialKeyL

2、aboratoryofICEngine,KunmingUniversityofScienceandTechnology,Kunming650500;2KunmingYunneiPowerCo,Ltd,Kunming650500)Abstract:Theperformanceofdieselenginewillchangewhenrunningatdifferentaltitudes;usingoxygenfuelcanreduceHC、COandPMemissions,StudyoninfluenceofEGRondieselengineusedoxygen

3、atedfuelperformanceunderdifferentaltitudeshasgreatsignificant.Throughtheatmospheresimulationsystem,experimentalstudyontheinfluenceofEGRonpowerperformance、fueleconomyandemissioncharacteristicsofdieselfuelandB15E5fuelin81kPaand100kPapressureenvironment.Thetestresultsshows:dieselengin

4、eperformancedeclinedobviousbyusingEGR,thetorqueof81kPadroppedhigherthan100kPa,thepowerperformanceofB15E5fueldroppedatmaximumtorquespeed,andthepeaktorquedisappeared.TheinfluenceofEGRonfueleconomyofdieselengineisnotobvious,theeconomyofB15E5fuelisbadthandieselfuel;thefuelconsumptionof

5、dieselengineincreasedin81kPaanddeclinedin100kPaatlowloadcasewithEGR.TheNOxemissionsofdieselenginesignificantlydeclinebyusingEGR,andthefallingrangegreaterwiththeloadincreasing.CarbonsmokeandCOemissionofdieselenginewassignificantlyincreasedbyusingEGR,carbonsmokeandCOemissionofB15E5fu

6、elwassignificantlylowerthanthatofpurediesel,smokeandCOemissionin81kPaishigherthan100kPa.TemperatureandpressureincylinderdecreasedbyusingEGR;at100kPacombustionstartedearlierthan81kPa.Keywords：DifferentAltitudes；EGR（ExhaustGasRecirculation）；DieselEngine；Oxygenatedfuel；Performance摘要：柴

7、油机在不同海拔地区运行时性能发生变化；含氧燃料可以降低柴油机HC、CO以及微粒排放，研究EGR对不同海拔地区含氧燃料柴油机性能的影响具有重要意义。利用大气模拟系统，在81kPa和100kPa的大气环境下，试验研究EGR对柴油、B15E5燃料动力性、经济性及排放特性的影响。结果表明：使用EGR后，柴油机动力性有较明显的下降，81kPa时转矩的下降幅度高于100kPa，B15E5燃料在最大转矩转速时动力性下降幅度大，转矩峰值消失。EGR对柴油机的经济性影响不明显，B15E5燃料的经济性差于纯柴油；小负荷工况有EGR时，柴油机油耗在81kPa时增加，而在100kP

8、a时下降。EGR使柴油机的NOx排放明显下降，并随着