Navistar MaxxForce 7 - Engine Features

SECTION1–ENGINESYSTEMS
EngineDescription(cont.)
injectionsandmoreprecisefueldeliverytoimprovecombustion,
emissions,andcoldstartperformance.
Thelow-pressurefuelsystemusesanintegratedlow-pressure
fuelmodulewithprimarylter,secondarylter,fuelcooler,and
electricself-primingfuelpumptodrawfuelfromthetank(s)to
theengine.Thisintegratedlow-pressuremodulesignicantly
reducesthenumberoffuellinesandconnectionpoints,and
ismountedovertheleftvalvecover.Theprimaryfuellter
assemblyincludesaWaterInFuel(WIF)sensorandanoptional
fuelheater.Waterandsolidsareseparatedfromthefuelandthe
waterisconnectedinthewaterseparatorbowl.Theinstrument
panelWIFlampilluminateswhenwaterneedstobedrained.A
drainvalveinthewaterseparatorbowldrainswaterout.Fuelis
dischargedtothesecondaryfuellter.Thesecondaryfuellter
assemblyispressureregulatedandincorporatesanairbleed
oricetoautomaticallypurgeairintroducedintothesystem.
OptionalAirCompressor
Anaircompressorisavailableforapplicationsthatrequireair
brakesorairsuspension.
OptionalFuelHeater
Afuelheaterisavailableandinstalledintheprimaryfuellter
assembly.Theheaterwarmsthesupplyfueltopreventwaxing
duringcoldconditions.
OptionalCoolantHeater
Acoolantheaterisavailabletoraisethetemperatureofthe
coolantsurroundingthecylindersforimprovedperformance
duringcoldweatherstartups.
EngineFeatures
AftertreatmentSystem
Theengineandvehicleexhaustpipingincludesan
AftertreatmentSystemtocapturesootandotherparticulates
beforetheyexittheexhaustpipe.Thesootiscapturedbythe
DieselParticulateFilter(DPF)andisperiodicallyconvertedto
carbondioxide(CO
2
)byaRegeneration(Regen)process.For
furtherinformationseeAftertreatmentSystem(page55).
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