Investigative study of engine limiting
An experimental study was conducted to determine the effect of cylinder cut-out or ''engine limiting'' on fuel consumption and exhaust emissions for a current technology V-type 8-cylinder engine. Increases in energy conversion efficiency while operating with only 4 cylinders ranged from 10 to 40% compared to operation with 8 cylinders at the same power outputs. The speeds and loads chosen were representative of those required to operate a 4,500-lb vehicle at speeds up to 60 mph. Hydrocarbon emissions increased at low speed/load points under 4 cylinder operation. An insignificant change in carbon monoxide emissions was observed while an increase in oxides of nitrogen emissions resulted at the higher speed/load points.
- Research Organization:
- Department of Energy, Bartlesville, OK (USA). Bartlesville Energy Research Center
- OSTI ID:
- 5223615
- Report Number(s):
- BERC/RI-77/13
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AUTOMOBILES
SPARK IGNITION ENGINES
EXHAUST GASES
FUEL ECONOMY
CARBON MONOXIDE
DYNAMOMETERS
EFFICIENCY
HYDROCARBONS
NITROGEN OXIDES
TESTING
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ENGINES
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
VEHICLES
WASTES
330603* - Vehicle Design Factors- Engine System
330101 - Internal Combustion Engines- Spark-Ignition
330701 - Emission Control- Nitrogen Oxides
330702 - Emission Control- Carbon Monoxide
330704 - Emission Control- Hydrocarbons