Record Display for the EPA National Library Catalog


Main Title Simulation of high altitude effects on heavy-duty diesel emissions /
Author Human, David M. ; Ullman, T. L.
Other Authors
Author Title of a Work
Ullman, Terry L.
CORP Author Southwest Research Inst., San Antonio, TX.;Environmental Protection Agency, Ann Arbor, MI. Emission Control Technology Div.
Publisher GPO,
Year Published 1989
Report Number EPA/460/3-89/003; EPA-68-03-4044
Stock Number PB90-153867
OCLC Number 45261517
Subjects Diesel motor exhaust gas--Colorado--Analysis ; Air--Pollution--Research--Colorado ; Atmosphere, Upper--Colorado--Pollution
Additional Subjects Diesel engines ; Exhaust emissions ; Test chambers ; Experimental design ; Aldehydes ; Nitrogen oxides ; Carbon monoxide ; Hydrocarbons ; Particles ; Quality assurance ; Tables(Data) ; Fuel injection ; Concentration(Composition) ; Heavy duty vehicles ; High altitude environments ; Air pollution sampling ; Altitude tests
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELCM  EPA/460/3-89/003 NVFEL Library/Ann Arbor, MI 05/04/2001 STATUS
NTIS  PB90-153867 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation x, 84 pages : illustrations
Exhaust emissions from heavy-duty diesel engines operating at high altitude are of concern. EPA and Colorado Department of Health sponsored the project to characterize regulated and selected unregulated emissions from a naturally-aspirated Caterpillar 3208 and a turbocharged Cummins NTC-350 diesel engine at both 'low' and simulated 'high' altitude conditions (about 6000 ft). Emissions testing was performed over cold- and hot-start transient cycles as well as selected steady-state modes. Additionally, the turbocharged engine was operated with mechanically variable and fixed retarded fuel injection timing to represent 'normal' and 'malfunction' conditions, respectively. High altitude operation generally reduced NOx emissions approximately 10% for both engines. Average composite transient emissions of HC, CO, particulate matter, and aldehydes measured at high altitude for the naturally-aspirated engine were 2 to 4 times the levels noted for low altitude conditions. The same emission constituents from the turbocharged engine at high altitude with 'normal' timing were 1.2 to 2 times the low altitude levels, but were 2 to 4 times the low altitude levels with 'malfunction' timing.
"Report no. EPA/460/3-89-003." "Report date September 1989." "Work Assignment 1-8." Microfiche.