EFFECT OF MMT ON EMISSIONS FROM PRODUCTION CARS
One of two fleets tested in this study was operated for 50,000 miles on an EPA-type durability route. Certain of the cars, all 1977 models, use clear certification fuel while others use an additional 1/32 Mn/gallon or 1/16 Mn/gallon fuel additive. The average increase in HC, CO and NOx emissions was essentially the same for clear-fuel cars and MMT (methylcyclopentadienyl managanese tricarbonyl) cars, with deterioration rates being somewhat lower for the MMT cars. A second twenty car fleet was fueled half with clear fuel and half with 1/8 Mn/gallon. Engine-out data show only little differences in stabilized emission levels between the clear-fuel cars and the MMT cars, both before and after deposit removal. As-received tailpipe emission data showed a larger spread in individual car ratings, probably because of missing air-pump belts on some cars and other malfunctions of the air delivery system. Average tailpipe emissions after tune-up showed only small differences between the clear-fuel and MMT cars, with the difference in hydrocarbon emissions resulting from the abnormally high HC emissions of one MMT car.
- Presented at the SAE meeting, February 27-March 3, 1978.
Warrendale, PA United States 15096
- Lenane, D L
- Publication Date: 1978
- Pagination: 22 p.
- TRT Terms: Additives; Carbon monoxide; Catalysts; Embankments; Exhaust gases; Hydrocarbons; Inorganic compounds; Manganese; Motor fuels; Nitric oxide; Nitrogen oxides; Pollutants; Vehicle power plants
- Old TRIS Terms: Additive compounds; Automobile engines; Embankments /zoned/; Manganese compounds
- Subject Areas: Highways; Safety and Human Factors; Vehicles and Equipment;
- Accession Number: 00180090
- Record Type: Publication
- Source Agency: Engineering Index
- Report/Paper Numbers: SAE 780003 Preprint
- Files: TRIS
- Created Date: Oct 12 1978 12:00AM