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Exhaust Emissions from Heavy-Duty Trucks Tested on a Road Course and by Dynamometer
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Abstract
This is a summary compilation and analysis of exhaust-emission results and operating parameters from forty-five heavy-duty gasoline and diesel-powered vehicles tested over a 7.24-mile road course known as the San Antonio Road Route (SARR); and, for correlative purposes, on a chassis dynamometer.(2)
Exhaust samples were collected and analyzed using the Constant Volume Sampler (CVS) technique similar to that used in emission testing of light-duty vehicles. On the road course, all equipment and instrumentation were located on the vehicle while electrical power was supplied by a trailer-mounted generator. In addition to exhaust emissions, operating parameters such as vehicle speed, engine speed, manifold vacuum, and transmission gear were simultaneously measured and recorded on magnetic tape.
The forty-five vehicles tested represent various model years, GVW ratings, and engine types and sizes. The testing was performed under several EPA contracts with Southwest Research Institute during the years 1972 through 1975.
This paper summarizes results from the road-route tests and the chassis-dynamometer tests, and makes comparisons between these two test procedures.
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Citation
Kennedy, G., White, J., Springer, K., and Ingalls, M., "Exhaust Emissions from Heavy-Duty Trucks Tested on a Road Course and by Dynamometer," SAE Technical Paper 750901, 1975, https://doi.org/10.4271/750901.Also In
References
- Springer K. J. “Transportation, Trucks and Fuel Conservation”
- Ingalls M. N. Springer K. J. “Mass Emissions from Ten Pre-Controlled Gasoline Trucks, and Comparisons Between Different Trucks on a Road Course,” Final Report to EPA under Contract 68-03-0441 April 1975
- Federal Register 33 108 Department of Health, Education, and Welfare June 4 1968
- Ingalls M. N. Springer K. “In-Use Heavy-Duty Gasoline Truck Emissions - Part II, Surveillance Study of Control Equipped Heavy Duty Gasoline-Powered Vehicles,” Final Report to EPA under Contract EHS 70-113 June 1974
- Ingalls M. N. Springer K. J. “In-Use Heavy-Duty Gasoline Truck Emissions - Part I, Mass Emissions from Trucks Operated Over a Road Course” Final Report to EPA under Contract EHS 70-113 February 1973
- Ingalls M. N. Springer K. J. “Mass Emissions from Diesel Trucks Operated Over a Road Course” Final Report to EPA under Contract 68-01-2113 August 1974