1 Recent Developments in Diesel Engine Emission Control Technology November 2004 Manufacturers of Emission Controls Association www.meca.org Diesel Emission Control Technology Is Making Significant Progress General technology approaches to hitting the regulations – Widespread filter usage in Japan and SCR in Europe in 2005 – Filters provide PM control for U.S. HDE 2007 Filter technology – Reliable regeneration – Improved properties; ash storage/management – Retrofit experience and options expanding NOx solutions – SCR is near commercial – NOx adsorbers are on HDD engine dynos Integrated solutions – SCR/DPF are on vehicles – LNT/DPF in commercial sales – Retrofit options available for combined PM/NOx reductions
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Recent Developments in Diesel Engine Emission … Recent Developments in Diesel Engine Emission Control Technology November 2004 Manufacturers of Emission Controls Association Diesel
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Recent Developments in Diesel Engine Emission Control Technology
November 2004
Manufacturers of Emission Controls Association
www.meca.org
Diesel Emission Control Technology Is Making Significant Progress
General technology approaches to hitting the regulations– Widespread filter usage in Japan and SCR in Europe in 2005– Filters provide PM control for U.S. HDE 2007
Catalyst Integration for NOx Adsorbers and Filters Is Commercial
References: SAE 2004-01-0578 and 2004-01-0579
•NOx adsorber catalyst is coated directly on wall-flow filter
•“Active oxygen” aids filter regeneration
•First commercial applications: - Euro passenger car (2.0L): 0.12 g/km NOx (50% of Euro IV); 0.002 g/km PM - Japanese light-duty truck engine (4.0L)
Toyota DPNR System
Prototype V6 Diesel Demonstrates Full Useful LifeBin 5 NOx Performance with DPF/LNT System
• 0.074 g/mi NOx demonstrated after 68 deSOx cycles (equiv. to 150K miles)
Source: Cummins 2004 DEER
4.2 Liter V6,5000 lb. ETW
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Integrated Solutions for Combined PM/NOx Reductions Available for Retrofit
Emulsified Diesel Fuel + DOC or DPF– 15-40% NOx reduction
Low Pressure EGR + DPF – 40-60% NOx reduction
Lean NOx Cat. + DPF or DOC – 25-35% NOx reduction
Verified Retrofit SCR Systems Expected In the Near Future
Other Recent Diesel Technology Items in the News
Volvo launches bus fleet in Sweden equipped with DPF/SCR systems; claimed to be cleanest diesel buses operating on the planet (below Euro V heavy-duty limits)Univ. of Wisconsin wins DOE FutureTruck competition for third straight year with diesel hybrid Explorer equipped with DPF/SCR system (near SULEV NOx levels)GTL test program with Class 6 delivery trucks in California shows significant NOx and PM emission benefits for GTL vs. CARB diesel (SAE Paper No. 2004-01-2959)– 16% lower NOx, 23% lower PM over the NYC Bus cycle– With CB-DPF: 20% lower NOx, 97% lower PM
First vehicle results for PM sensor with transient response presented at DEER 2004 DPF-equipped passenger cars in Europe approach one million since 2000 PSA introduction with good performance (systems include use of fuel borne catalyst or catalyzed filter)
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Conclusions
All Major Markets Moving to Tight PM and NOx Emission Standards for Diesel EnginesA Variety of Technologies Are Available and Emerging for PM, NOx, and Toxic HC Emission Control for Both Diesel Light-Duty and Heavy-Duty VehiclesRetrofit Experience Is Growing Worldwide with a Variety of Technology Options Available for Controlling PM and NOx Emissions from On- and Off-Road Diesel EnginesTechnologies Are Advancing and Recent Developments Indicate that HDDE 2007/2010 and Tier 2/LEV 2 Emission Levels Will Be Achievable On-Road Diesel Technologies Will Migrate into Nonroad Diesel ApplicationsThe Ultimate Solution to Reducing Emissions from Diesel Engines Requires a Systems Approach Utilizing Advanced Engine Designs, Advanced Integrated Emission Control Technology, and Low Sulfur Diesel Fuel