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1、均质混合气压缩着火(HCCI)技术解析HomogeneouschargecompressionignitiontechnologyofshrinkageTheHCCIenginelikethetraditionalgasolineenginethat,mixedgassuctionuniform,butwithoutthesparkplugignition,butbyincreasingthecompressionratio,theexhaustgasrecirculation,intakeheatingandpressurizingtechnology,im
2、provethemixtureincylindertemperatureandpressure,andthespontaneouscombustionofmixedgascompressor.Apluralityofignitionkernelisformedinthecylinder,effectivelymaintainthestabilityofflamecombustion,andreduceplantflamepropagationdistanceandthecombustionduration.Theburningrateitisonlyrelat
3、edwithchemicalreactionkineticsofitself.ThecharacteristicsofdieselHCCIcombustionTherealizationofdieselHCCIcombustiontoface,facingtwodifficulties:oneisthedieseloilofhighviscosity,lowvolatility.Itisdifficulttoformahomogeneousmixture;twoisadieselisashighassixteenoctanefuel,pronetosponta
4、neouscombustionatlowtemperaturereaction,thecombustionspeedcontroldifficultyofhomogeneousmixture,easycauseroughburning.DieselHCCIcombustionisalsooccursinmanypoints,thereisnoobviousflame,combustionreactionisrapid,thecombustiontemperatureislowandthedistributionisuniform,onlylowproducti
5、onofNOxandPM,withhighthermalefficiencyatlowloads.Butthetraditionaldieselenginewithhighpressureinjectionformingnonuniformlymixedgasdiffusioncombustion,gasmixtureandtemperaturedistributionisveryuneven,inthediffusionflameshell7coffeeChenshovelstudentNOx,internalhighstainlesshypoxiahous
6、eholdsstudentPmorethan3,theinfluencefactorsofdieselHOClcombustionmode3,effectof3kindsofmixedgas!TheformationofdieselHCCIcombustion.HomogeneousmixtureformationistoachievethefirststepofHCCIcombustioncontrol,includingtheinternationaluseofdieselhomogeneouspremixedgas:inletcylinderextern
7、alpremixed,earlyincylinderinjectionandlateinjection.CylinderpremixedHCCIThatis,thedieselspraypeopleintakepipeintheintakestroke,andairmixtureformationofpremixedgas.Usingaportinjection,tostrengthenthemixtureformationbyintakeswirl,istoimprovethemixtureuniformityofarelativelysimplemetho
8、d.3,1,2earlyincylin
