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Diesel Engine Emissions Summit June 10, 2003 Phoenix, Arizona Rainer E. Schmueckle President and CEO Freightliner LLC

Diesel Engine Emissions Summit June 10, 2003 Phoenix, Arizona Rainer E. Schmueckle President and CEO Freightliner LLC. 0.6. 1990. 0.5. 0.4. PM (g/bhp-hr). 0.3. 1991. 0.2. 0.1. 1998. 2002/2004. 1994. 2010. 2007. 0.01. 0.2. 1.0. 2.0. 3.0. 4.0. 5.0. 6.0. NOx (g/bhp-hr).

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Diesel Engine Emissions Summit June 10, 2003 Phoenix, Arizona Rainer E. Schmueckle President and CEO Freightliner LLC

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  1. Diesel Engine Emissions SummitJune 10, 2003Phoenix, ArizonaRainer E. SchmuecklePresident and CEOFreightliner LLC

  2. 0.6 1990 0.5 0.4 PM (g/bhp-hr) 0.3 1991 0.2 0.1 1998 2002/2004 1994 2010 2007 0.01 0.2 1.0 2.0 3.0 4.0 5.0 6.0 NOx (g/bhp-hr) Two Decades of Emissions Regulations

  3. Current Emissions Strategies Control In-Cylinder Combustion • Retarded Injection Timing • Boost Injection Pressure • 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

  4. Diesel Engine Emissions SummitJune 10, 2003Phoenix, Arizona

  5. Emissions Reduction Strategies Optimized Combustion Particulate Filter PM Combustion Controls SCR / NOx Adsorber 0.01 0.2 NOx © Freightliner LLC. All Rights Reserved. 6/10/03

  6. Diesel Engine Emissions SummitJune 10, 2003Phoenix, Arizona

  7. 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

  8. Engine Smaller Particulate Filter SCR Urea Injection Selective Catalytic Reduction Smaller Particulate Filter SCR 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

  9. NOx Adsorber NOx Adsorber Diesel Injection Engine Particulate Filter NOx Adsorber Diesel Injection 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

  10. Emission Technology ComparisonCurrent Research Preliminary Estimates As of June 2003 © Freightliner LLC. All Rights Reserved. 6/10/03

  11. Diesel Engine Emissions SummitJune 10, 2003Phoenix, Arizona

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