Mack CSM 2010 - Page 179

Mack,EmissionsSolution171
TheMackSCRsystemissimpleandeffective,withfewcomponents.Itconsistsofa
AftertreatmentDEFtankpositionednearthestandarddieseltank,plusaAftertreatmentDEF
pump,AftertreatmentDEFDosingunitandSCRcatalyst.
TheadvantageofusingDEFisthatitenablestheenginetouselessEGR--andhigher
oxygenlevels--forbettercombustion,whilemeetingtheEPAnear-zeroNOxemissions
requirementofNOx.ByusingDEF,weavoidthedisadvantagesofincreasingEGRto
massivelevels.ThisresultsinbetterfueleconomyfromyourMackengine.
W2055493
HorizontalSCR,
CAUTION
DonotputdieselfuelintheAftertreatment
DEFtank.Dieselfuel,ifsprayedintothe
hotexhaustalongwiththeDEF,could
igniteexplosivelycausingareresulting
inpersonalinjuryordamagetotheexhaust
system.