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AMBIENT TEMPERATURE AND DRIVING CYCLE EFFECTS FROM AN AUTOMOBILE POWERED BY LIQUIFIED PETROLEUM GAS
Citation:
Gabele, P. AMBIENT TEMPERATURE AND DRIVING CYCLE EFFECTS FROM AN AUTOMOBILE POWERED BY LIQUIFIED PETROLEUM GAS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-93/268 (NTIS PB93212744).
Description:
This paper describes an emissions study of a 1991 Chevrolet Lumina, powered by liquefied petroleum gas. he study was designed to obtain emissions information to predict how liquid petroleum gas usage impacts ambient air quality and air toxics concentrations. he study was also designed to develop a better understanding of the effect of ambient-temperature variations on liquefied petroleum gas emissions. t the time the data were gathered, the automobile's mileage was 4,000 miles. using three different driving cycles, emission tests were performed at temperatures of 20 and 75 degrees F. est results confirm that liquefied petroleum gas emissions are relatively insensitive to change in ambient temperatures, although slight increases were noted in formaldehyde and acetaldehyde emissions for the 20 degrees F cold-start tests. oxic emission rates were low, compared with those from similar low-mileage vehicles that operate on compressed natural-gas (CNG) and 85/15 percent methanol/gasoline fuel. hen organic and carbon Monoxide emissions are used to determine ozone-forming potentials, the values for the liquefied petroleum gas-powered vehicle fall well below those for the various gasolines being tested in the current "Auto/Oil Study" and appear to be approximately equal to those values reported for CNG-powered vehicles.