Transcript No Slide Title

Diesel Engine Emissions Summit
June 10, 2003
Phoenix, Arizona
Rainer E. Schmueckle
President and CEO
Freightliner LLC
Two Decades of
Emissions Regulations
0.6
1990
PM (g/bhp-hr)
0.5
0.4
0.3
1991
0.2
0.1
0.01 2010 2007
0.2
1.0
1998
2002/2004
2.0
3.0
NOx (g/bhp-hr)
1994
4.0
5.0
6.0
Current Emissions Strategies
Control In-Cylinder Combustion
1. Retarded Injection Timing
2. Boost Injection Pressure
3. Reduce Peak Combustion Temperature
(e.g., EGR, ACERT)
Collectively, These Strategies Reduce
Vehicle Fuel Economy!
– Less Than Optimal Combustion
© Freightliner LLC. All Rights Reserved. 6/10/03
Diesel Engine Emissions Summit
June 10, 2003
Phoenix, Arizona
PM
Particulate Filter
Emissions Reduction Strategies
SCR / NOx Adsorber
0.01
0.2
NOx
© Freightliner LLC. All Rights Reserved. 6/10/03
Diesel Engine Emissions Summit
June 10, 2003
Phoenix, Arizona
Exhaust Gas Recirculation
Engine
Large
Particulate
Filter
In 2007, High Rates of EGR (or ACERT) May be Used
- Known Technology
- Decreases Fuel Economy
- Increases Engine Heat Rejection
- Weight Issues
© Freightliner LLC. All Rights Reserved. 6/10/03
Selective Catalytic Reduction
Engine
Smaller
Particulate
Filter
SCR
SCR
Urea
Urea
Injection
In 2007, SCR systems May be Used
- Optimize In-cylinder Combustion
- Increase in Fuel Economy
- Possible Weight, Maintenance Benefits
- Urea Infrastructure – the Challenge
© Freightliner LLC. All Rights Reserved. 6/10/03
NOx Adsorber
Diesel
Injection
Engine
NOx
Adsorber
Particulate
Filter
Diesel
Injection
NOx
Adsorber
NOx Adsorbers are not Currently Viable
- Too Large
- Too Expensive
- Diesel Must be Injected in Exhaust
(Fuel Economy Penalty)
© Freightliner LLC. All Rights Reserved. 6/10/03
Emission Technology Comparison
Current Research
Fuel Economy
High EGR
SCR
NOx
Adsorber
-3%
+6%
-3%
(3 - 6% Urea Usage)
Cooling Requirements
+55%
-20%
0%
-5%
+6%
0%
+50 lbs.
-400 lbs.
+200 lbs.
Oil Exchange Intervals
1X
2X
1X
Urea Infrastructure
No
Yes
No
None
Urea Refill
None
Power Density
Weight
Driver’s Responsibility
Preliminary Estimates As of June 2003
© Freightliner LLC. All Rights Reserved. 6/10/03
Diesel Engine Emissions Summit
June 10, 2003
Phoenix, Arizona