Emissions From Heavy-Duty Trucks Converted to CNG

[+] Author and Article Information
S. G. Fritz

Department of Emissions Research, Southwest Research Institute, San Antonio, TX 78228-0510

R. I. Egbuonu

Energy Management Office, City of Houston, Houston, TX 77002

J. Eng. Gas Turbines Power 114(3), 561-567 (Jul 01, 1992) (7 pages) doi:10.1115/1.2906625 History: Received September 27, 1991; Online April 24, 2008


Emissions are reported for four heavy-duty trucks, which were converted to operate on compressed natural gas fuel. Two 1988 model year Ford F700 Series trucks equipped with 7.0 L gasoline engines and two 1986 model year GMC trucks equipped with DDC 8.2 L diesel engines were tested on a heavy-duty chassis dynamometer in a baseline condition and again after conversion to natural gas. The vehicles were tested over the EPA Urban Dynamometer Driving Schedule for Heavy-Duty Vehicles and at no-load curb idle. Regulated emissions of NOx , CO, HC, and diesel particulate, along with nonmethane hydrocarbons, are reported in grams/mile. Fuel economy is reported in energy-equivalent miles per gallon of gasoline or diesel fuel.

Copyright © 1992 by The American Society of Mechanical Engineers
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