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Integration of Engine Controls, Exhaust Components and Advanced Catalytic Converters for ULEV and SULEV Applications
Technical Paper
2001-01-3664
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
Spring Fuels & Lubricants Meeting & Exhibition
SAE International Fall Fuels & Lubricants Meeting & Exhibition
Language:
English
Abstract
Development of integrated engine controls, exhaust components and advanced catalytic converters was demonstrated on a 1998 full size luxury sedan with a gasoline PFI 4.4 L V8 engine. This level of emissions management was targeted for ULEV and SULEV emission standards. An air gap, dual exhaust, six-catalyst system, was modified in stages to reduce the number of catalysts and associated controls/hardware. Engine controls and calibration were developed to reduce cold-start emissions, catalyst light-off time and tailpipe emissions. Systems integration involved reduced precious metal loading, secondary AIR and modification of emission control devices. The thermal mass of the air gap exhaust pipes was reduced by approximately 30 percent, which contributed to improved catalyst heat-up time. A vacuum-insulated catalytic converter with phase change material was used to store exhaust heat and resist heat loss during times of dwell/soak. FTP-75 tests typically included two LA4 preparation cycles prior to soak. Upon engine start, the catalyst was at an elevated temperature, thereby reducing cold-start emissions. Catalyst start temperatures, which are a function of prep cycle and soak times, were studied.
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Authors
Topic
Citation
Karwa, M., Hill, F., Biel, J., and Crocker, M., "Integration of Engine Controls, Exhaust Components and Advanced Catalytic Converters for ULEV and SULEV Applications," SAE Technical Paper 2001-01-3664, 2001, https://doi.org/10.4271/2001-01-3664.Also In
References
- Karwa, M. Biel, J.P. Hill, F.B. Crocker, M. “Development of a SULEV Capable Technology for a Full Size Gasoline Pfi V8 Passenger Car” SAE Technical Paper # 2001-01-1314
- Lindner, D. Mussman, L. van den Tillaart, J.A.A. Lox, E.S. Roshan, A. Garr, G. Beason, R. “Comparison of Pd-only, Pd/Rh, and Pt/Rh Catalysts in TLEV, LEV Vehicle Applications - Real Vehicle Data versus Computer Modeling Results” SAE Technical Paper # 2000-01-0501 2000
- Sims, G.S. Johri, S. “Catalyst Performance Study Using Taguchi Methods” SAE Technical Paper # 881589 1988
- Webb, C. Bykowski, B. Weber, P. McKinnon, D. “Using Advanced Emission Control Systems to Demonstrate LEV II ULEV on Light-Duty Gasoline Vehicles” SAE Technical Paper # 1999-01-0774 1999
- Burch, S. Biel, J. “SULEV and Off-Cycle Emissions Benefits of a Vacuum-Insulated Catalytic Converter” SAE Technical Paper # 1999-01-0461 1999
- Adamczyk, A. Hubbard, C. Ament, F. Oh, S. Brady, M. Yee, M. “Experimental and Modeling Evaluations of a Vacuum-Insulated Catalytic Converter” SAE Technical Paper # 1999-01-3678 1999
- U.S. EPA “Federal Test Procedure Review Project: Preliminary Technical Report,” May 1993
- Magbuhal, S. Long, J. “Improving California's Motor Vehicle Emissions Inventory Activity Estimates Through the Use of Datalogger-equipped Vehicles,” 6 th CRC On-road Vehicle Emissions Workshop March 1996