Fuel Economy Trends in Passenger Car Fleets - Effects of Emissions Controls

790929

02/01/1979

Event
1979 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
Records for 20,728 passenger cars covering 1967 through 1977 models were analyzed to see the effects of emissions controls on fuel economy. Data on weight, engine displacement, compression ratio, carburetion, transmission type, axle ratio, air conditioning, and miles driven per month were obtained for each car. Linear regression analyses of these data showed design changes during this period affected fuel economy significantly. Around 1973, there were appreciable decreases in fuel economy relative to 1967 models, whereas for 1975 through 1977 increases were observed. Fuel economy for cars meeting California emission standards was lower than for those meeting Federal standards.
Meta TagsDetails
DOI
https://doi.org/10.4271/790929
Pages
12
Citation
Gray, D., Freeman, J., Keller, J., and Koehl, W., "Fuel Economy Trends in Passenger Car Fleets - Effects of Emissions Controls," SAE Technical Paper 790929, 1979, https://doi.org/10.4271/790929.
Additional Details
Publisher
Published
Feb 1, 1979
Product Code
790929
Content Type
Technical Paper
Language
English