Navistar MaxxForce 13 - Downstream Injection (DSI) Unit

DIAGNOSTICMANUAL
1.DownstreamInjection(DSI)unit
Figure14DSIUnit(MaxxForce®DT ,9and10Engines)
DownstreamInjection(DSI)Unit
TheDSIunitisconnectedtothecleansideofthelow-pressurefuelsystem,andwillprovideametered
amountoffueltotheAftertreatmentFuelInjector(AFI).TheDSIunitprovidespressurizedfuelinjectionpulses
totheAFI.TheAFIisamechanicalpoppettypeinjector,andwillonlyinjectfuelwhenfuellinepressure
isincreasedaboveaspecicpressure.
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