Volvo VN - System Operation

Volvo,US10EmissionsSolution349
SystemOperation
1Dieselengineoptimizedforhighperformance,lowparticleemissionsandlow
fuelconsumption.
2AftertreatmentDEFtank
3TheAftertreatmentControlModule(ACM)continuouslymonitorsandadjuststhe
AftertreatmentDEFpumppressureinresponsetocurrentengineloadconditions.
4DEFisinjectedintotheexhaustgasesinbetweentheAftertreatmentDPF(5)
andtheSCRcatalyst(6).
5AftertreatmentDieselParticulateFilter(DPF).
6IntheSCRcatalyst,nitrogenoxidesaretransformedintoharmlessnitrogengas
andwater.
7ThesystemnotiesthedriverwhenitistimetorelltankwithDEF.
TheV olvoSCRsystemissimpleandeffective,withfewcomponents.Itconsists
ofaAftertreatmentDEFtankpositionednearthestandarddieseltank,plusa
AftertreatmentDEFpump,AftertreatmentDEFDosingunitandSCRcatalyst.
TheadvantageofusingDEFisthatitenablestheenginetouselessEGR--and
higheroxygenlevels--forbettercombustion,whilemeetingtheEPAnear-zeroNOx
emissionsrequirementof0.2g/hp-hrNOx.ByusingDEF,weavoidthedisadvantages
ofincreasingEGRtomassivelevels.Thisresultsinbetterfueleconomyfromyour
V olvoengine.
W2055491
VerticalSCR,verticalinlet