EFFECTS OF LOW AMBIENT TEMPERATURE ON THE EXHAUST EMISSIONS AND FUEL ECONOMY OF 84 AUTOMOBILES IN CHICAGO
This report describes the results of a project in which pairs of tests were conducted in 84 in-use passenger cars, once under low temperature conditions (16 F to 57 F), and again under standard laboratory conditions. Each sequence included the 1975 Federal Test Procedure (exhaust emissions only), the Highway Fuel Economy Test and three short cycle tests. The vehicles were randomly obtained, tested in a 'as-received' condition, and work was performed between January and March 1978. Results show that HC and CO are most sensitive to cold temperature, while NOX is affected only slightly. Fuel economy suffered by an average of 7%, Vehicle fleets from manufacturers which used different control technologies were found to behave considerably differently at low temperatures.
Environmental Protection AgencyTechnology Assessment and Evaluation Branch
Ann Arbor, MI United States 48105
- Heinmiller, W
- Publication Date: 1978-10
- Pagination: 25 p.
- TRT Terms: Air pollution; Automobiles; Carbon monoxide; Cold weather; Exhaust gases; Fuel consumption; Hydrocarbons; Laboratory tests; Low temperature tests; Nitric oxide; Nitrogen oxides; Sensitivity; Temperature gradients; Testing
- Geographic Terms: Illinois
- Subject Areas: Energy; Highways; Vehicles and Equipment;
- Accession Number: 00191225
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: 78-3 Tech. Rpt.
- Files: TRIS
- Created Date: May 11 1979 12:00AM