This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Catalytic Emission Control System Field Test Program
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1975 by SAE International in United States
Annotation ability available
A fleet of nearly 250 cars equipped with experimental catalytic converter systems were tested in taxi, police, state, and municipal fleets in various cities throughout the country. This provided a diversified range of customer service and altitude and climatic conditions. The objective was to evaluate the performance and durability in high mileage field service of experimental catalytic emission control systems. The fleet comprised groups of cars with hardware and calibration variations designed toward the 1975 Federal and California and more advanced emission requirements. The converter systems evaluated were primarily a 260 cubic inch underfloor converter and a 140 cubic inch manifold converter. Both bead and monolith substrate catalysts were examined.
Test results showed that on the average the systems successfully controlled emissions to below the 1975 Federal and California requirements for greater than 50,000 miles. Engine misfire conditions did cause converter damage in some instances. Systems designed for the low emission requirements of .41/3.4/.40 grams/mile HC/CO/NOx exceeded those levels at relatively low mileage due to catalyst deterioration.
CitationMiles, D., Faix, L., Lyon, H., and Niepoth, G., "Catalytic Emission Control System Field Test Program," SAE Technical Paper 750179, 1975, https://doi.org/10.4271/750179.
- Cole E. N., Niepoth G. W., “Internal Combustion Engine and Method of Operation for Exhaust Emission Control” Patent No. 3,824,788, July 23, 1974.
- Barnes G. J., Klimisch R. L., “Initial Performance of Supported NOx Reduction Catalysts in a Dual-Catalyst System” SAE Paper 740251 presented at the Automotive Engineering Congress in Detroit, Michigan in February, 1974.
- Gumbleton J. J., Bolton R. A., Lang H. W., “Optimizing Engine Parameters With Exhaust Gas Recirculation” SAE Paper 740104 presented at the Automotive Engineering Congress in Detroit, Michigan, in February, 1974.
- Bond W. D., “Quick-Heat Intake Manifolds for Reducing Cold Engine Emissions” SAE Paper 720935 presented at the National Fuels and Lubricants Meeting in Tulsa, Oklahoma, November, 1972.
- Pless L. G., “Deposits, Wear, and Catalyst Performance With Low-Ash and Ashless Engine Oils”, SAE Paper to be presented at the SAE Automobile Engineering Meeting in Detroit, Michigan, in October, 1975.