DEF System - Diesel Exhaust Fluid

A __________________ warning in the dash cluster indicates that the DEF level has fallen below a critical level. This can be corrected by refilling the DEF tank

"DEF Fluid Critical"

The exhaust temperature during a normal active regeneration event could reach _________ and possibly _________ under certain conditions

1100o F, 1500o F

DEF has a shelf life of approximately ______ years if stored in controlled temperatures between _________ deg F

2 years, 10 and 90

DEF consumption will be approximately _____ of your fuel consumption

2%

Parked (Stationary) Regeneration be sure there are no items within _____ of the exhaust outlet. Items that can burn, melt or explode must be kept at least ____ from the exhaust outlet

2', 5'

The engine will begin the active regeneration process once the exhaust temperature is hot enough and will continue until the soot in the DPF has been burned off. Expect this process to take between ___________ minutes

20 and 40

Perform a DPF regeneration by one of the following methods: a. Change to a more challenging duty cycle - such as highway driving - for at least ______________ to increase exhaust temperatures. OR b. Perform a _________ regeneration.

20 minutes, Parked

Once regeneration is complete, exhaust gas and exhaust surface temperatures will remain elevated for ___________

3-5 minutes

Diesel Exhaust Fluid (DEF) Tank _______

5 Gallons

_________________ Required when the duty cycle does not generate enough heat to convert all the carbon being collected in the DPF

Active Regeneration

A "DEF Fluid Critical" warning combined with an illuminated _____________________ indicates that the DEF level is critically low. This can be corrected by refilling the DEF tank

Check Engine Lamp/Amber Warning Lamp

A flashing DPF Lamp combined with an illuminated ______________________ indicates that the aftertreatment DPF needs regeneration immediately. A parked regeneration is required

Check Engine Lamp/Amber Warning Lamp

Exhaust gas containing Oxides of Nitrogen (NOx) exits the Cummins Particulate Filter and enters a tube called the ________________

Decomposition Reactor

The Aftertreatment system consists of a __________________ and technology ___________

Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR)

TRUE/FALSE? Regeneration will adversely affect pump operation.

FALSE

TRUE/FALSE? The apparatus must be taken out of service during a parked regeneration

FALSE

If a regeneration is not performed in a timely manner after the DPF Lamp is illuminated, the DPF Lamp will begin to ________. This indicates a higher level of PM in the DPF

Flash

The ___________ Lamp illuminates to indicate that high exhaust temperatures may exist due to aftertreatment regeneration.

High Exhaust System Temperature (HEST)

Exhaust flows out of the engine and into the Cummins _______________

Particulate Filter

______________Occurs when the exhaust temperatures are naturally high enough to oxidize soot collected in the aftertreatment DPF faster than the soot is being collected

Passive Regeneration

__________________ typically occurs when the vehicle is driven at high speeds (ie, highway speeds) and/or under heavy loads

Passive regeneration

________________ is the process of converting soot collected from in the aftertreatment DPF into carbon dioxide

Regeneration

The NOx and ammonia (NH3) pass into the ___________ where a catalytic reaction takes place, converting the NOx into harmless _______________ and water vapor (H2O). The result - near zero emissions

SCR element, nitrogen gas (N2)

_________________ when illuminated or flashing, that the Aftertreatment DPF requires regeneration.

The Aftertreatment DPF Lamp indicates

DEF breaks down into _______________ during a chemical reaction in the Decomposition Reactor through a process known as ___________

ammonia (NH3), hydrolysis

DEF is a solution of 32.5% automotive grade _________ and 67.5% ____________

urea, deionized water