基于6135Z柴油機(jī)的CNG單燃料發(fā)動(dòng)機(jī)性能模擬研究.pdf

1、西南交通大學(xué)碩士學(xué)位論文基于6135Z柴油機(jī)的CNG單燃料發(fā)動(dòng)機(jī)性能模擬研究姓名：邵曉杰申請學(xué)位級別：碩士專業(yè)：動(dòng)力機(jī)械及工程指導(dǎo)教師：周斌20080601西南交通大學(xué)碩士研究生學(xué)位論文第l頁AbstractWiththerapiddevelopmentofautomobileindustryenvironmentpollutionandglobalshortageofoilresourcesisincreasinglyserious，

2、whichmustbeachallengetothetraditionaloilfuelandcombustionformofautomobileenginesThenaturalgasbecomesanalternativefuelwithgreatpotentialfordevelopment，foritslowemission，cheappriceandabundantresourceAtpresent，thedomesticna

3、turalgasenginesaremostlyrefittedbygasolineenginesanddieselenginesThemainproblemofthemodifiedenginesisadecreaseofenginepowerInordertostudythereasonsofenginepowerdecreasingandhowtestoreenginepowerthispapertakesanexamplefor

4、6135Zdieselengine，andtheresearchismadeon6135ZnaturalgasengineoriginatedfromitThemainresearchworkincludes：(1)Thewhole6135ZdieselenginemodelisbuiltupwithGTPOWER，andtheperformanceofthe6135ZdieselengineissimulatedTheresultof

5、thesimulationisbasicallyconsistentwiththeexperimentalresult，whichprovesthecorrectnessoftheenginemodel(2)Anaturalgasenginemodelisbuiltonthebasisofthedieselenginemodel，andanalyzeismadeonhowthenaturalgasengineperformanceisi

6、mpactedwhenthewayofpressurechargingvariesTheexternalcharacteristicofthenaturalgasengineissimulatedwiththemodelThereasonsofenginepowerdecreasingareindicatedbycomparingtheexternalcharacteristicofthenaturalgasengineandtheon

7、eofthedieselengine(3)Inordertoimprovethenaturalgasenginepowerpressureratioofthecompressorisincreased，andairfuelratio，compressionratio，ignitionadvanceangleandvalvetimingareoptimizedRelevantimprovementviewsaremadebyanalyzi

8、ngtheirinfluenceonthenaturalgasenginepowerAccordingtothesimulationresult，whenimprovingpressureratioofthecompressorappropriateairfuelratio，compressionratio，ignitionadvanceangleandvalvetimingcanrestorethenaturalgasenginepo