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- W174958013 abstract "A test program was conducted to study the effects of ambient conditions on exhaust emissions from a variety of automobiles. Twenty-six cars, ranging from 1967 models through catalytic converter-equipped prototypes and cars powered by unconventional engines (rotary, Diesel, and stratified charge), were tested at 20/sup 0/, 50/sup 0/, 75, and 110/sup 0/F. Test procedure was the 1975 FTP, but with engine hoods closed and cooling air flow keyed to vehicle speed. HC, CO, NOx, total aldehydes, and reactive hydrocarbons, plus carbon balance fuel economy, were measured. From production cars and catalyst-equipped cars, '75 FTP composite emissions of all three gaseous pollutants were highest at 20/sup 0/F. HC and CO were generally lowest at 75/sup 0/F; composite values were greatly influenced by cold start (Bag 1) emissions. Composite NOx emissions were generally lowest at 110/sup 0/F, and were relatively unaffected by ambient temperature. Fuel economy at 20/sup 0/F was about 10% lower than at 110/sup 0/F. The Diesel and stratified charge cars had low emissions and little temperature sensitivity. Use of air conditioners at 110/sup 0/F caused higher emissions and about 10% lower fuel economy. Reactivity of HC emissions and aldehyde emissions were unaffected by temperature and were lower from catalyst-equippedmore » cars at all temperatures.« less" @default.
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- W174958013 date "1975-03-01" @default.
- W174958013 modified "2023-09-27" @default.
- W174958013 title "Supplement to ambient temperature and vehicle emissions. Final report" @default.
- W174958013 hasPublicationYear "1975" @default.
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