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- W346947068 abstract "The effectiveness of the federal diesel smoke regulations in controlling smoke emissions from 64 heavy duty diesel engines engaged in routine automotive service was determined. The rate of smoke increase or deterioration was more dependent on how the miles were accumulated than on total mileage. The a and b smoke factors from the acceleration and lugdown portions of the Federal test were consistently related to engine make and model. At the end of one year of testing, 13 engines, or 20 percent of the trucks, registered smoke opacity in excess of either the a or b smoke limits for 1970. Twelve of the 13 engines exceeded the Federal limit during the full power lugdown portion of the test. Fifty-nine vehicles were tested for gaseous emissions of unburned hydrocarbons, carbon monoxide, and nitrogen oxides, and 43 engines, or 73 percent, met the 1973 California standards for heavy duty diesel engines. None of these engines met the 1975 California emissions standards." @default.
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- W346947068 date "1974-01-01" @default.
- W346947068 modified "2023-09-27" @default.
- W346947068 title "Surveillance study of smoke from heavy-duty diesel-powered vehicles: southwestern U. S. A. (final report)" @default.
- W346947068 hasPublicationYear "1974" @default.
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