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Vehicle Testing of the OBD-II Catalyst Monitor on a 2.2 L Corsica TLEV
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English
Abstract
The performance of the OBD-II catalyst monitor of a 2.2 Corsica TLEV was investigated while operating on fuels with differing sulfur levels. Testing was performed using a driving schedule producing operating conditions which were acceptable to the production OBD-II system for active diagnosis of catalyst performance. During each test, catalyst diagnostic data and emissions performance data were collected simultaneously. Tests were performed at 22° C using California Phase II (35 ppm sulfur content) and Indolene clear (470 ppm sulfur content) fuels, and at 4°C using a commercial oxygenated Winter fuel (320 ppm sulfur content). Four dynamometer-aged converters were using in the testing. Converter performance in the form of HC conversion efficiency was found to generally decrease when the sulfur content in the fuel was increased. The OBD-II catalyst monitor followed a similar trend in that the measured oxygen storage capacity generally decreased as the sulfur content in the fuel was increased. This trend was particularly evident if the vehicle was subjected to increased dynamometer loading to simulate an incline in the road surface.
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Citation
Beck, D. and Short, W., "Vehicle Testing of the OBD-II Catalyst Monitor on a 2.2 L Corsica TLEV," SAE Technical Paper 952424, 1995, https://doi.org/10.4271/952424.Also In
References
- “Malfunction and Diagnostic System Requirements - 1994 and Subsequent Model Year Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles With Feedback Fuel Control Systems” California Code of Regulations September 14 1989 Sept. 26 1990
- Clemmens W.B. Sabourin M.A. Rao T. “Detection of Catalyst Performance Loss Using On-Board Diagnostics” SAE Paper No. 900062 1990
- Koupal J.W. Sabourin M.A. Clemmens W.B. “Detection of Catalyst Failure On-Vehicle Using the Dual Oxygen Sensor Method” SAE Paper No. 910561 1991
- Hepburn J.S. Gandhi H.S. “The Relationship Between Catalyst Hydrocarbon Conversion Efficiency and Oxygen Storage Capacity” SAE Paper No. 920831 1992
- Fisher G.B. Theis J.R. Casarella M.V. Mahan S.T. “The Role of Ceria in Automotive Exhaust Catalysis and OBD-II Catalyst Monitoring” SAE Paper No. 931034 1993
- Monroe D.R. Krueger M.H. Beck D.D. D'Aniello, M.J. Jr. “Catalysis and Automotive Pollution Control II” Crucq A. Amsterdam Elsevier Science Publishers 593 1991
- Beck D.D. Krueger M.H. Monroe D.R. “The Impact of Sulfur on Three-Way Catalysts: Storage and Removal” SAE Paper No. 910844 1991
- Koehl W.J. Hochhauser A.M. Reuter R.M. Benson J.D. Burns V.R. Gorse, R.A. Jr. “Effects of Gasoline Sulfur Level on Mass Exhaust Emissions” SAE Paper No. 912323 1991
- “Effects of Fuel Sulfur on Mass Exhaust Emissions, Air Toxins, and Reactivity” Auto/Oil Air Quality Research Program, Technical Bulletin No. 8 1992
- Koehl W.J. Hochhauser A.M. Reuter R.M. Benson J.D. Burns V.R. Gorse, R.A. Jr. SAE Paper No. 912321 1991
- Summers J.C. Skowron J.F. Williamson W.B. Mitchell K.I. “Fuel Sulfur Effects on Automotive Catalyst Performance” SAE Paper No. 920558 1992
- Gottberg I. Hogberg E. Weber K. “Sulfur Storage and Hydrogen Sulfide Release from a Three-Way Catalyst Equipped Car” SAE Paper No. 890491 1989
- Beck D.D. Sommers J.W. DiMaggio C.L. Monroe D.R. “Axial Characterization of Oxygen Storage in Warmup and Underfloor Converters Aged on a 3800 Vehicle” 14th North American Meeting of the Catalysis Society June 14 1995
- Ohata A. Ohashi M. Nasu M. Inoue T. “Model-Based Air-Fuel Ratio Control for Reducing Exhaust Gas Emissions,” SAE Paper No. 950075 1995
- Carnevale C. Coin D. Secco M. Tubetti P. “A/F Ratio Control with Sliding Mode Technique,” SAE Paper No. 950838 1995
- AAMA Fuel Surveys Winter 1994 Summer 1994
- Beck D.D. Short W.A. Angelos T.A. Dils R.R. “IIM240 Emission Tests with a 2.2 L Corsica TLEV” SAE Paper No. 942001 1994
- Gurnew M.D. Allsup J.R. “Predictability of Emissions from In-Use Vehicles at Low Ambient Temperature and Alternate Driving Cycle Based on Standard Tests” SAE Paper No. 890625 1989
- Laurikko J. Nylund N.-O. “Regulated and Unregulated Emissions from Catalyst Vehicles at Low Ambient Temperatures,” SAE Paper No. 930946 1993
- Doyon J. Mitchell K. Mayhew T. “The Effect of Gasoline Composition on Vehicle Tailpipe Emissions at Low Ambient Temperature,” SAE Paper No. 932669 1993