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Overview of EGR Systems for Commercial Diesel Engines

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Overview of EGR Systems for Commercial Diesel Engines
Overview of EGR Systems for Commercial Diesel Engines
CTI Stuttgart May, 9th and 10th 2012
Dr.-Ing. Karl Wübbeke, Dipl.-Ing. (FH) Jessica Jasper

Overview of EGR Systems for Commercial Diesel Engines

Content
Emissions and Fuel Consumption: A Trade Off Conflict in Emissions Reduction
Strategies to lower Emissions in Engine Operation
Measurement and Control of Exhaust Gas Recirculation for Heavy Duty
Application

CTI Conference Stuttgart May 9th/10th 2012

Testing Specifications
Pierburg Product Development invirogated by Simulation Capabilities
Summary

www.kspg.com

© Pierburg 2012

2

Overview of EGR Systems for Commercial Diesel Engines

Systems Interaction in Emission Reduction for Commercial Diesel
Engines
0,15

Injection System
EU 2

Combustion System

Engine Control System en hm n a e m n ah ß ßn a
Ma M e ch e
BasicrisEngine
h o EU 3 ot c
DPF
rm ris e n in to
(OEM)
EU 3 o DPF m er n in
0,02
Turbo Charging
SCR
(OEM)

PM [g/kWh]

CTI Conference Stuttgart May 9th/10th 2012

0,10

EU 2

EU 5
0,01

EU 4

Exhaust Gas
Recirculation
EU 6
EU 5

EU 4

Diesel Particulate
Filter
NOX red.

0

EU 6 www.kspg.com 0,4

2,0

3,5

5,0

7,0

NOX red.
NOx [g/kWh]
© Pierburg 2012

3

Overview of EGR Systems for Commercial Diesel Engines

Exhaust Gas Recirculation as a Measure to reduce Emissions during the Combustion Process
Rich

CTI Conference Stuttgart May 9th/10th 2012

Lean
Akihama, SAE 2001 et. al.

EGR as added inert gas
²

Reduction of the peak combustion temperature

²

Lower NOx- production rates

EGR is limited due to combustion system and operation conditions like cold start, low ambient temperatures, engine temperature and torque demand www.kspg.com © Pierburg 2012

4

Overview of EGR Systems for Commercial Diesel Engines

Selective Catalytic Reduction (SCR) in order to reduce NOx to N2 and H2O
A SCR system needs
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