Mass emissions from diesel trucks operated over a road course. Final report

Technical Report · Thu Aug 01 00:00:00 EDT 1974

OSTI ID:5208782

Ingalls, M N; Springer, K J

Exhaust emission measurements obtained with a constant volume sampler on 10 1970 to 1973 heavy-duty diesel-powered vehicles (over 6000 lb gross vehicle weight) operated over the San Antonio Road Route (SARR), a 7.24 mi road course involving several different types of driving, were compared with laboratory results obtained from a chassis version of the 13-mode Federal Test Procedure. The road hydrocarbon and carbon monoxide emissions in terms of g/lb of fuel agreed well with the chassis 13-mode results for a given truck, although the road emissions were generally higher than the 13-mode emissions. The 13-mode results, converted to g/lb of fuel, resulted in substantially higher nitrogen oxide values (60%) overall as compared to results obtained on the road course. Average hydrocarbon, CO, and NOx emissions over the SARR were: 3.01, 18.63, and 13.57 g/lb fuel. Average hydrocarbon, carbon monoxide, and nitrogen dioxide emissions over the 13-mode test were 1.29, 5.62, and 9.90 g/brake horsepower/hr. Run-to-run repeatability of emissions data for the road tests on a given truck varied on an average of 46% for hydrocarbons, 38% for CO, and 23% for NOx. Mass emissions were thus acquired from diesel-powered, heavy-duty trucks while operated on the road.

• Research Organization: Southwest Research Inst., San Antonio, Tex. (USA)
• OSTI ID: 5208782
• Report Number(s): PB-224316/AS; EPA-460/3-74-017
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
33 ADVANCED PROPULSION SYSTEMS
DIESEL ENGINES
EXHAUST GASES
AIR POLLUTION
BENCH-SCALE EXPERIMENTS
CARBON MONOXIDE
HYDROCARBONS
NITROGEN DIOXIDE
ROADS
TESTING
TRUCKS
VEHICLES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ENGINES
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
330102 - Internal Combustion Engines- Diesel