Navistar MaxxForce 7

SECTION4–ENGINEOPERATION
Operation(cont.)
AFTERTREATMENTSYSTEM
Theengineandvehicleexhaustpipingincludesan
AftertreatmentSystemtocapturesootandotherparticulates
beforetheyexittheexhaustpipe.Thesootiscapturedbythe
DieselParticulateFilter(DPF)andisperiodicallyconvertedto
carbondioxide(CO
2
)byaRegeneration(Regen)process.
TheRegenprocessmaytakeplaceduringvehicleoperation
(ActiveRegen).TheActiveRegenprocesswillbetriggeredby
eitheratime-basedsootorasootmassbuildup-basedstrategy.
AParkedRegenprocessisrequiredwhensufcientthermal
energyhasnotbeenpresenttoinitiatetheprocessforDiesel
OxidationCatalyst(DOC)lightoff.Thevehicleisrequiredtobe
parked(stationary).
•AParkedRegenerationwillberequestediftheRegeneration
cannotbecompletedduringdriving.
•Inthiscase,adash-mountedlampwillbelittoalertthedriver
toperformaParkedRegeneration.
•ThedrivermustparkthevehicleandthenperformtheRegen
asrequired.
•FollowtheParkedRegenerationprocesslistedintheVehicle
OperatorManual.
•IftheParkedRegenerationprocessisignored,theengine
maystoprunning.
•See“SafetyInformation”(page3)forsafetyprecautions.
ADOCoperatestooxidizetheinjectedfueltoincreasethe
exhaustgastemperatureasneededforDPFRegen.
ENGINEIDLESHUTDOWNTIMER(U.S.
FEDERAL-OPTIONAL[2010AND2011VEHICLES])
GOVERNMENTREGULATION:Stateandlocal
regulationsmaylimitengineidletime.Thevehicle
owneroroperatorisresponsibleforcompliancewith
theseregulations.
TheoptionalIdleShutdownTimer(IST)allowstheEngine
ControlModule(ECM)toshutdowntheengineduringextended
idle.Idletimecanbeprogrammedfrom2to120minutes.The
ECMcanbeprogrammedtodeactivatetheISTwhenthePTO
isactive.
Thirtysecondsbeforeengineshutdown,theIDLESHUTDOWN
indicatorilluminates.Thiscontinuesuntiltheengineshutsdown
orthelowidleshutdowntimerisreset.Theenginemustbeoutof
gearfortheISTtowork.Engineshutdowntimerwilldeactivate
foroneormoreofthefollowingconditions:
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