This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of MMT® Fuel Additive on Emission System Components: Comparison of Clear- and MMT®-fueled Escort Vehicles from the Alliance Study
Technical Paper
2004-01-1084
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Emission studies were carried out on clear-fueled and MMT®-fueled 100,000-mile Escort vehicles from the Alliance study [SAE 2002-01-2894]. Alliance testing had revealed substantially higher emissions from the MMT-fueled vehicle, and the present study involved swapping the engine cylinder heads, spark plugs, oxygen sensors, and catalysts between the two vehicles to identify the specific components responsible for the emissions increase. Within 90% confidence limits, all of the emissions differences between the MMT- and Clear-vehicles could be accounted for by the selected components. NMHC emission increases were primarily attributed to the effects of the MMT cylinder head and spark plugs on both engine-out and tailpipe emissions. CO emission increases were largely traced to the MMT cylinder head and its effect on tailpipe emissions. NOx emission increases were linked to the MMT catalyst. In addition to heavy deposits on the valves and spark plugs from the MMT vehicle, substantial deposits were also observed on the catalyst, with approximately 20% of the channels totally blocked.
Recommended Content
Authors
Citation
McCabe, R., DiCicco, D., Guo, G., and Hubbard, C., "Effects of MMT® Fuel Additive on Emission System Components: Comparison of Clear- and MMT®-fueled Escort Vehicles from the Alliance Study," SAE Technical Paper 2004-01-1084, 2004, https://doi.org/10.4271/2004-01-1084.Also In
References
- Furey R.L. Summers J.C. How MMT Causes Plugging of Monolithic Converters SAE 780004 1978
- Lichtenstein I.E. Mundy J.P. MMT Plugging of Oxidation Catalysts on Ceramic and Metal Supports During Engine Dyno Studies of Catalyst Durability SAE 780005 1978
- Hurley R.G. Watkins W.L.H. Griffis R.C. Characterization of Automotive Catalysts Exposed to the Fuel Additive MMT SAE 890582 1989
- Williamson W.B. Gandhi H.S. Weaver E.E. Effects of Fuel Additive MMT on Contaminant Retention and Catalyst Performance SAE 821193 1982
- Faggan J.E. Bailie J.D. Desmond E.A. Lenane D.L. An Evaluation of Manganese as an Antiknock in Unleaded Gasoline SAE 750925 1975
- Lenane D.L. MMT - A Further Evaluation SAE 770656 1977
- Lenane D.L. Effect of MMT on Emissions from Production Cars SAE 780003 1978
- Gibbs R. Wotzak G. Byer S. Johnson R. Hill B. Werner P. Emissions from In-Use Catalyst Vehicles SAE 770064 1977
- Hurley R.G. Hansen L.A. Guttridge D.L. Gandhi H.S. Hammerle R.H. Matzo A.D. The Effect of Mileage on Emissions and Component Durability by the Fuel Additive Methylcyclopentadienyl Manganese Tricarbonyl SAE 920730 1992
- Technical Response to Environmental Protection Agency Regarding Ethyl Corporation Fuel Additive Waiver for MMT Chrysler Corporation June 1990
- Benson J.D. Manganese Fuel Additive (MMT) Can Cause Vehicle Problems SAE 770655 1977
- Benson J.D. Spark Plug Validation Tests with MMT General Motors Publication R&D-8629 1997
- Faix L.J. A Study of the Effects of Manganese Fuel Additive on Automotive Emissions SAE 780002 1978
- Benson J.D. Campion R.J. Painter L.J. Results of Coordinating Research Council MMT Field Test Program SAE 790706 1979
- Hurley R.G. Hansen L.A. Guttridge D.L. Gandhi H.S. Hammerle R.H. Matzo A.D. The Effect on Emissions and emission Component Durability by the Fuel Additive Methylcyclopentadienyl Manganese Tricarbonyl SAE 912437 1991
- Hubbard C.P. Hepburn J.S. Gandhi H.S. The Effect of MMT on the OBD-II Catalyst Efficiency Monitor SAE 932855 1993
- Wallace J.S. Garbe R.J. Effects of MMT on Exhaust Emissions SAE 790707 1979
- Benson J.D. Dana G. The Impact of MMT Gasoline Additive on Exhaust Emissions and Fuel Economy of Low Emission Vehicles (LEV) SAE 2002-01-2894 2002
- Wotring W.T. Meguerian G.H. Gandhi H.S. McCuiston F.D. Piken A.G. 50,000 Mile Vehicle Road Test of Three-Way and NOx Reduction Catalyst Systems SAE 780608 1978
- Roos J.W. Lenane D.L. Dykes K.L. Scull H.M. A Systems Approach to Improved Exhaust Catalyst Durability: The Role of the MMT Fuel Additive SAE 2000-01-1880 2000
- Lenane D.L. Effect of a Fuel Additive on Emission Control Systems SAE 902097 1990
- Combustion Chamber Deposit Research Tool Development - Part 1: Vehicle Deposits and Emissions CRC Report No. 630 2002
- McCabe R.W. Usmen R.K. Characterization of Pd-based Automotive Catalysts Studies in Surface Science and Catalysis 101 Hightower J.W. Delgass W.N. Iglesia E. Bell A.T. 1996 Elsevier Science B.V.
- Pakko J.D. DiCicco D.M. Adamczyk A.A. Tradeoffs Between Space Velocity and Loading on the Conversion Efficiencies of Aged Palladium Catalysts Ford Research Laboratory Technical Report SRR-1998-0070 1998