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2010 Technology Dealer Update
Detroit Diesel / Freightliner Trucks

41st WSHEMA Conference
Wayne Stephan – DDC & Eric Magyar - Freightliner
August 18th, 2009

Security Classification1Line

2010 emissions control system

Daimler Trucks 69

How BlueTec Works
Exhaust leaves the engine with
the pollutants NOx and PM

= Exhaust
= Diesel Exhaust Fluid
(DEF)

Particulate Matter (PM) is trapped
in the Diesel Particulate Filter
(DPF)

DEF injected into the
exhaust stream

NOx
PM

DEF
NOx
PM

DEF solution ‘hydrolyzes’ into
ammonia gas (NH3) which mixes
with the exhaust

Ammonia (NH3) and Nitrogen
Oxides (NOx) react in the catalyst
to form Nitrogen and Water

NH3

SCR
Catalyst

H2O N2

Daimler Trucks 70

Specifications / Packaging
BlueTec technology will add 3 key components [DEF tank, 1-Box configuration or 2-box
configuration, Aftertreatment Control Module (ACM)] as well as some supporting hardware to
the 2010 product offering. Notice how seamlessly the 1-Box SCR system fits into the chassis.

Left View

DEF TANK
ACM

Right View

SCR 1-Box
(DOC, DPF, SCR Catalyst)

Daimler Trucks 71

DEF Pump
DEF Pump is mounted on the rear of the DEF tank. Its function is to extract DEF from the
tank and transfer it to the SCR catalyst for the NOx and DEF reaction that creates Nitrogen
and Water.
Compone
nt

CAD Drawing

CDU/Component Photo

DEF
Pump

Item

Component

1

Electric Pump

2

DEF Chamber

3

DEF Pressure
Bladder

4

4
1

2

3

DEF Filter

Note: DEF Filter has a
300,000 mile change
interval.
Daimler Trucks 72

Aftertreament Control Module (ACM)
The Aftertreatment Control Module mounted on the air tanks and under to the battery box, is
the brains for the BlueTec emissions system, it controls DEF dosing, NOx Sensor,
regeneration strategies among many other emissions activities.
Compone
nt

CAD Drawing

CDU/Component Photo

ACM

Item

Component

1

ACM Housing

2

ACM

1

2

Note: ACM designed to not
have to remove the
connectors

Daimler Trucks 73

1-Box sensors
The sensor box is mounted on top of the 1-Box unit and is a central location for NOx,
pressure and temperature sensors for the system.
Compone
nt

Items
Item

CDU/Component Photo
4

Component

1

(2) 14 pin Connections to
engine harness

2

NOx Sensor

3

Pressure Sensor

4

Temperature Sensor
Connector

1

1

4
2

2
4

3

3

4

Sensor
Box

Daimler Trucks 74

BlueTec 1-Box
The BlueTec 1-Box solution is located under the passenger side of the vehicle, it is easily
accessed by removing a side fairing.
Compone
nt

CAD Drawing

CDU/Component Photo

1-Box

Ite
m

1

Component

1

Top Inlet

2

Sensor Box

3

DEF Metering Unit

4

Inboard Outlet

5

Rear Face Outlet

6

DEF Injection Nozzle

7

Outer Heat Shield

8

Front Face Inlet

2
4

8

3
7

5
6

Note: Sensor box is NOT ACM
Daimler Trucks 76

1-Box Flow
The following diagram illustrates the follow of exhaust through the DOC and DPF. Then
where the DEF enters the hydrolysis pipe and eventually meets the exhaust in the SCR
device. Detroit Diesel’s dual parallel flow (ATD & SCR catalyst) reduces backpressure on the
engine thus increasing fuel efficiency.

Item
1

Component
Diesel Oxidation Catalyst
(DOC)

2

Diesel Particulate Filter
(DPF)

3

SCR Devices

4

DEF Hydrolysis Pipe

2

1
1
2

3
3

4

Daimler Trucks 77

1-Box Serviceability
The Diesel Particulate Filter (DPF) is serviceable. SRT times have not been finalized,
however it is estimated to take less than 2 hours to change the DPF. DPF change intervals
are been studied, but currently have not changed from the EPA07 levels of 300,000 miles.

Item Component
1

Diesel Oxidation Catalyst
(DOC)

2

Diesel Particulate Filter
(DPF)

3

DEF Nozzle

2

Note: DOC is integrated into the 1Box system

1

3

Daimler Trucks 78

Info

Published on : 2017-12-15 03:42:55
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