16’ Engine Exhaust After Treatment System

Question 1

Beginning in ______, U.S. Domestic diesel engines were required to comply with more stringent EPA emissions standards to control emissions.

Answer 1

2007

Question 2

ATD - ____________________

Answer 2

After Treatment Device

Question 3

DOC - ____________________

Answer 3

Diesel Oxidation Catalyst, found inside the ATD

Question 4

DPF - ____________________

Answer 4

Diesel Particulate Filter, found inside ATD

Question 5

SCR - ____________________

Answer 5

Selective Catalyst Reduction, found after the

Question 6

DEF - ____________________

Answer 6

Diesel Exhaust Fluid

Question 7

Lamps & ECU w/fully-integrated __________________ (OBD)

Answer 7

On-Board Diagnostics

Question 8

ATD - a ________ canister, which replaced the typical muffler.

Answer 8

Exhaust

Question 9

The ____ will trap particulate matter, ______ & ______.

Answer 9

DPF
Soot & Ash

Question 10

Soot accumulated in the ____ requires periodic self-cleaning through _________

Answer 10

DPF
Regeneration

Question 11

SCR - a catalytic converter that uses vaporized diesel exhaust fluid (DEF) to reduce ______ ______ (NOx) emissions

Answer 11

Nitrogen Oxide

Question 12

Known as DEF, _____, or ___-____

Answer 12

Urea
Ad-Blue

Question 13

_____% urea & deinized water, which breaks down into ammonia NH3 in a decomposition reactor through the process hydrolysis.

Answer 13

32.5%

Question 14

The NOx and ammonia (NH3) pass into the SCR element where a catalytic reaction takesplace, converting the NOx into harmless ________ ______ (N2) and water vapor (H2O).

Answer 14

Nitrogen Gas

Question 15

_____ ____ and later emissions requirements include engines receiving an upgraded engine ECU with fully-integrated ______________________________ (OBD).

Answer 15

2013 EPA
On-Board Diagnostics

Question 16

2013 EPA & Later Engines - the drive engine indicator panel also includes a ________ ________ _______ (MIL)

Answer 16

Malfunction Indicator Lamp

Question 17

The amber ______ _____, or ______ ______, light indicates a non-critical system fault with the engine has occurred. The operator can drive the vehicle to the _____ of their shift and call service to remedy the problem.

Answer 17

Check Engine or Engine Warning
End

Question 18

The ____ ______ ______ light indicates a serious engine fault that may result in engine damage has occurred and the vehicle should be shut down as soon as it is safe to do so. The engine should remain shut down until serviced by an authorized Cummins dealer.

Answer 18

RED Stop Engine

Question 19

The Malfunction Indicator (MIL) light, illuminates when a fault has occurred on an __________ related component. The engine and aftertreatment system should be diagnosed and serviced at the next __________ opportunity.

Answer 19

Emission
Available

Question 20

If the ____ and _______ _______ Lamp illuminate together, the vehicle should be stopped as soon as it is safe to do so. The vehicle should be serviced by an authorized Cummins dealer.

Answer 20

MIL
Stop Engine

Question 21

The Diesel Particulate Filter (DPF) light will illuminate when a __________ is necessary. There are progressive stages of need for regeneration indicated by this light:

Answer 21

Regeneration

Question 22

1. Symbol ___ ______ (low to medium levels of particulate build up). The vehicle requires regeneration but should be able to complete its mission before a regen is performed.

Answer 22

On Solid

Question 23

Initiate a DPF regeneration by switching to a more challenging duty cycle (such as highway driving for at least ___ minutes or pumping)

Answer 23

20

Question 24

2. ________ (medium to high levels of particulate build up). The vehicle requires a regeneration as soon as possible.

Answer 24

Flashing

Question 25

3. ________ DPF with ________ ________ _______ light (high level of particulate build up). A DPF regeneration is required immediately. The operator must perform a ________ regeneration

Answer 25

Flashing
Amber Check Engine
Parked

Question 26

4. If a parked regeneration is not performed the ______ ______ ______ lamp will illuminate. The vehicle should be ________ and remain shut down until serviced by an authorized Cummins dealer.

Answer 26

Red Stop Engine
Stopped

Question 27

The ______ _______ ______ ______(HEST) light indicates an active regeneration has been initiated and exhaust system temperatures are elevated above normal levels.

Answer 27

High Exhaust System Temperature

Question 28

The HEST light will remain on until exhaust temperatures have dropped below ____°F (525°C).

Answer 28

977°

Question 29

If the HEST light is ON and the vehicle speed has dropped below the threshold of ___ miles per hour, the light will remain ON until the vehicle speed increases ~___ mph back above the speed threshold and the regeneration process finishes.

Answer 29

5
3

Question 30

_________ ________ can occur during normal engine operation, when exhaust temperatures naturally get high enough to oxidize the soot in the DPF.

Answer 30

Passive Regeneration

Question 31

________ ________ is controlled by the engine ECU. Injecting a small amount of ______ fuel into the exhaust stream. This raises the exhaust temperature to provide the heat needed to burn off the accumulated soot and regenerate the DPF.

Answer 31

Active Regeneration
Diesel

Question 32

The need for ______ ________ occurs more frequently within low speed, low load, or stop and go conditions.

Answer 32

Active Regeneration

Question 33

When the DPF light turns on, the operator can: Provide assistance to the engine by either changing the duty cycle to allow the engine ECU to initiate the regeneration (________ ________ _________), or:

Answer 33

Automatic Active Regeneration

Question 34

When the DPF light turns on, the operator can: Manually initiate a parked regeneration using the regeneration switch, which is located in the cab within reach of the driver (______ / ______ Regeneration).

Answer 34

Parked / Stationary

Question 35

ECU will auto Regen when:
1. ___ light illuminates
2. Sufficient ________ flow & ________ conditions
3. ___ MPH or higher vehicle speed

Answer 35

DPF
Exhaust & Temperature
5

Question 36

Parked Regeneration - Trucks RPM ____

Answer 36

900

Question 37

Do not perform parked regeneration while connected to an ________ extraction system.

Answer 37

Exhaust

Question 38

Performing A Parked Regen - Clear exhaust outlet area ___ ft of any items, gasses, vapors that can melt, burn or explode.

Answer 38

5

Question 39

Performing A Parked Regen - If indoors, exhaust discharge pipe must be rated at least ____°F (816°C).

Answer 39

1500°

Question 40

Performing A Parked Regen - _____ with the vehicle. Monitor the area during the operation. if any unsafe conditions occur, shut off engine immediately!

Answer 40

STAY

Question 41

Performing A Parked Regen - Diesel Particulate Filter (DPF) lamp must be ___ in order to start a stationary regeneration.

Answer 41

ON

Question 42

Performing A Parked Regen - Regeneration may take ___-___ minutes or more, depending on soot level.

Answer 42

20-40

Question 43

Performing A Parked Regen - Exhaust temps stay high at least __-__ minutes after completion.

Answer 43

3-5

Question 44

4. To stop a regeneration before completion, depress ________ pedal, ________ parking brake, press the
   regeneration ________ switch, or turn ______ the engine.

Answer 44

Throttle
Release
Inhibit
OFF

Question 45

After completion of regeneration, the HEST light will remain illuminated until the exhaust outlet temperature is below ____°F (525°C) or the vehicle speed exceeds ___ mph.

Answer 45

977°
5

Question 46

Maintenance - ____ will illuminate and a fault code will be set when ash removal is necessary.

Answer 46

CEL

Question 47

16’ Regen:
The maintenance interval is ________-________ miles, or up to _______ hours, which is dependent on duty cycle,type of oil used, and oil consumption rate.

Answer 47

200,000-400,000
6,750

Question 48

Maintenance - Using CES20081/API CJ-4 oil will ________ the DPF maintenance interval.

Answer 48

Maximize

Question 49

DEF level between full and ___% full: DEF Fluid Low light will remain OFF.

Answer 49

38

Question 50

DEF level between ___% full and ___% full: DEF Fluid Low light will illuminate _____.

Answer 50

38 & 12
Solid

Question 51

DEF level below ___% full: DEF Fluid Low light will ______.

Answer 51

12
Flash

Question 52

DEF level below ___% full (__/__ gallon remaining):
— DEF Fluid Low light flashing and amber Check Engine lit ______.

Answer 52

5
1/4
Solid

Question 53

DEF tank empty and system can no longer maintain DEF pressure: DEF Fluid ____ light flashing, ______ Check Engine lit solid, and ____ light lit solid.

Answer 53

Low
Amber
MIL

Question 54

DEF Tank Empty and ignored:
-engine intentionally shut down or in extended idle:
DEF Fluid Low light flashing, amber Check Engine lit solid, red ______ Engine lit solid, and MIL light lit solid.

Answer 54

Stop