Navistar MaxxForce 9

DIAGNOSTICMANUAL
COMPONENTDESCRIPTIONS(THEORYOFOPERATION)
6.1.MAXXFORCE
®
DT,9AND10
1.DieselOxidationCatalyst(DOC)2.DieselParticulateFilter(DPF)
Figure13DOCandDPFAssembly(MaxxForce®DT ,9and10Engines)
DieselOxidationCatalyst(DOC)
TheDOCdoesthefollowing:
•Oxidizeshydrocarbonsandcarbonmonoxide(CO)inexhauststream
•Providesheatforexhaustsystemwarm-up
DieselParticulateFilter(DPF)
TheDPFdoesthefollowing:
•Capturesandtemporarilystorescarbon-basedparticulatesinalter
•Allowsforoxidation(regeneration)ofstoredparticulatesonceloadinggetstoaparticularlevel(restriction)
•Providestherequiredexhaustbackpressuredropforengineperformance
•Storesnon-combustibleash
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