Influence of mixture distribution on emissions from an aircraft piston engine. Final report Jun 74-May 78

Technical Report · Wed Oct 01 04:00:00 EDT 1980

OSTI ID:6785045

Mirsky, W; Nicholls, J A

Cylinder-to-cylinder mixture ratio distributions were measured for both the injected and carbureted versions of the AVCO-Lycoming 0-320 engine to determine the effects of non-uniform distribution on the exhaust emissions of carbon monoxide, hydrocarbons, and oxides of nitrogen. Data for both normal and lean-out conditions were obtained. An experimental Turbulent Flow Manifold for the carbureted engine was tested as a potential means for improved cylinder-to-cylinder distribution. Results showed improvements for the low power operating modes but deterioration for the high power modes. An analysis based on test results predicts that the EPA emission requirements can be met, for this engine, by improving mixture distribution and leaning both the taxi-out and approach modes. Improvements in fuel economy are also predicted.

• Research Organization: Michigan Univ., Ann Arbor (USA). Dept. of Aerospace Engineering
• OSTI ID: 6785045
• Report Number(s): AD-A-139475/8
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
AVIATION FUELS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBURIZATION
CHALCOGENIDES
CHEMICAL ANALYSIS
DISPERSIONS
DISTRIBUTION
EXHAUST GASES
FLUID FLOW
FLUIDS
FUELS
GASEOUS WASTES
GASES
HARDENING
HYDROCARBONS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
STANDARDS
SURFACE HARDENING
SURFACE TREATMENTS
TURBULENT FLOW
VARIATIONS
WASTES