Achieving Tier 2 Bin 5 Emission Levels with a Medium Duty Diesel Pick-Up and a NOX Adsorber, Diesel Particulate Filter Emissions System-Exhaust Gas Temperature Management 2004-01-0584
Increasing fuel costs and the desire for reduced dependence on foreign oil has brought the diesel engine to the forefront of future medium-duty vehicle applications in the United States due to its higher thermal efficiency and superior durability. The main obstacle to the increased use of diesel engines in this platform is the upcoming extremely stringent, Tier 2 emission standard. In order to succeed, diesel vehicles must comply with emissions standards while maintaining their excellent fuel economy. The availability of technologies such as common rail fuel injection systems, low sulfur diesel fuel, NOX adsorber catalysts (NAC), and diesel particle filters (DPFs) allow the development of powertrain systems that have the potential to comply with these future requirements. In meeting the Tier 2 emissions standards, the heavy light-duty trucks (HLDTs) and medium-duty passenger vehicles (MDPVs) will face the greatest technological challenges. In support of this, the U.S. Department of Energy (DOE) has engaged in several test projects under the Advanced Petroleum Based Fuels-Diesel Emission Control (APBF-DEC) activity. The primary technology being addressed by these projects is the sulfur tolerance of the NAC/DPF system and the durability implications of varying fuel sulfur levels. The test bed for one project in this activity is a 2500 series Chevrolet Silverado equipped with a 6.6L Duramax diesel engine certified to 2002 model year (MY) Federal heavy-duty and 2002 MY California medium-duty emission standards
While NAC systems have demonstrated extremely high levels of NOX reduction in steady-state laboratory evaluations, the application of a NAC system to an actual transient engine application requires the development of an integrated engine/emissions management system [1,2,3,4,5,6,7,8,9,10]. This paper discusses the integrated engine/emissions system management and regeneration control strategies that were developed. The final control strategies achieved over 98% reductions in tailpipe NOX mass emissions over the hot-start portion of the light-duty Federal Test Procedure (FTP-75). This paper discusses thermal management of exhaust gas temperature to maintain the high efficiency window for NAC operation through the use of a diesel-fueled burner. The discussion will cover cold-start strategies and low exhaust gas temperature operation.
Citation: Webb, C., Weber, P., and Thornton, M., "Achieving Tier 2 Bin 5 Emission Levels with a Medium Duty Diesel Pick-Up and a NOX Adsorber, Diesel Particulate Filter Emissions System-Exhaust Gas Temperature Management," SAE Technical Paper 2004-01-0584, 2004, https://doi.org/10.4271/2004-01-0584. Download Citation
Author(s):
Cynthia C. Webb, Phillip A. Weber, Matthew Thornton
Affiliated:
Southwest Research Institute, National Renewable Energy Laboratory
Pages: 11
Event:
SAE 2004 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Diesel Exhaust Emission Control-SP-1860, SAE 2004 Transactions Journal of Fuels and Lubricants-V113-4
Related Topics:
Environmental regulations and standards
Emissions control
Diesel particulate filters
Diesel / compression ignition engines
Particulate matter (PM)
Diesel fuels
Powertrains
Fuel economy
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