Simulation of high-altitude effects on heavy-duty diesel emissions. Final report, 31 October 1988-30 September 1989
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.
- Research Organization:
- Southwest Research Inst., San Antonio, TX (USA)
- OSTI ID:
- 6969978
- Report Number(s):
- PB-90-153867/XAB
- Resource Relation:
- Other Information: Portions of this document are not fully legible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DIESEL ENGINES
EXHAUST GASES
CHEMICAL COMPOSITION
AIR POLLUTION
ALDEHYDES
ALTITUDE
CARBON MONOXIDE
HYDROCARBONS
NITROGEN OXIDES
PARTICULATES
PROGRESS REPORT
QUALITY ASSURANCE
SAMPLING
SIMULATION
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DOCUMENT TYPES
ENGINES
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION
WASTES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)