Navistar MaxxForce 9 - Page 143

DIAGNOSTICMANUAL
1.DieselParticulateFilter(DPF)
2.DieselOxidationCatalyst(DOC)
6.DieselParticulateFilterOutlet
Temperature(DPFOT)sensor
Figure36DOCandDPFAssembly(MaxxForce®11,13and15Engines)
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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