Separation in double entry turbine housings in boosted gasoline engines

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1、COVERSTORYSUpERCHARgIngSYSTEMADVANTAGEScificpoweroutputontheonehandandAdditionallylongerexhaustvalveeventscompellinglow-endtorqueperformancearepossibleresultinginreducedpartTurbochargingincombinationwithontheotherhand.Cylinderblowdownloadfuelconsumption.directinject

2、ionandvariablevalvetim-separationcanbeaccomplishedthroughABi-turboconceptcancompletelyavoidingrepresentsthemajortechnologydifferenttechnologicalstrategies,e.g.theunwantedinteractionbetweenthetrendinmoderngasolineenginecon-scrollseparationinturbineorvariableexhaustbr

3、anches.Accordingto[1]theceptsforachievinghighspecificpowerexhaustvalveevent,❶.Theadvantagesadvantagesofdoubleentryhousingsout-outputwithlowfuelconsumptionattheareseenduringthegasexchange(e.g.weighsingleentryeveninthecaseofasametime.Inthiscontexttheseparationhighengi

4、nepressuredifference)aswellnon-idealseparation.Alongwithim-ofcylinderblowdowneventsisbenefi-asinthereducedin-cylinderresidualgasprovedturbinepoweroutput(duetopulsecialforthetrade-offbetweenhighspe-andhencereducedknocksensitivity.charging)theconceptleadstohigherAUTHO

5、RSDIPL.-ING.DOMINIKLÜCKMANNDIPL.-ING.TOLGAUHLMANNDR.-ING.HELMUTKINDLPROF.DR.-ING.isScientificAssistantatisTeamManagerAirandExhaustisTechnicalSpecialistEngineSTEFAN PISCHINGERtheInstituteforCombustionManagementintheBusinessUnitBoostingSystemspowertrainR&AisHeadoftheI

6、nstituteforEnginesofRWTHAachengasolineEnginesofFEVgmbHEngineeringEuropeatFordResearchCombustionEnginesofRWTHUniversity(germany).inAachen(germany).CenterAachen(germany).AachenUniversity(germany).4SEPARATIONINDOUBLEENTRYTURBINEHOUSINGSATBOOSTEDGASOLINEENGINESThesepara

7、tionofcylinderblowdowneventsonhighlyboostedfour-cylinderenginesisakeyenablertoreducethetrade-offbetweenthehighspecificpowerandgoodlow-endtorque.Thedoubleentryturbinehousingisakeytechnologyinachievingthis.TheworkfromtheInstituteforCombustionEnginesoftheRWTHAachenUniv

8、ersity,FEVandtheFordResearchLabAachenasdescribedbelow,showshowonecanoptimisethedegreeofseparationindoubleentryhousingsduringtheturbocharge