Application of fuel spray theory to exhaust emission control in a D. I. diesel engine. SAE Paper 760214
Recently diesel engines are required to get not only high performance but also low pollution gas quality (oxides of nitrogen, carbon monoxide, unburned hydrocarbons and smoke). Our approach to this requirement is based on the fuel spray theory that good fuel-air mixing in the fuel spray developed into the quiescent air depends upon high kinetic energy of the spray motion. From the theoretical analysis of fuel spray motion in the quiescent air and the photographic study of the fuel spray combustion, it was found that higher rate of air entrainment into the fuel spray by its own kinetic energy gives a very important effect on the increasing of combustion efficiency in the diesel engine and the reduction of soot formation. So, we designed the high volumetric efficiency but low swirl generating intake port in order to charge sufficient air into the cylinder, and an improved fuel injection system to attain high injection rate and high injection pressure so as to obtain high cycle efficiency and good fuel-air mixing in the quiescent air. As a result of many tests on this system using a single cylinder engine, a D.I. multi-cylinder diesel engine with high cycle efficiency and low smoke density was developed. The fuel injection timing of this engine is retarded to reduce the oxides of nitrogen in the exhaust gas. The fuel injector and fuel injection timing at light loads are improved to reduce the hydrocarbons in the exhaust gas.
- OSTI ID:
- 6677522
- Report Number(s):
- CONF-760278-27
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330102 -- Internal Combustion Engines-- Diesel
330701* -- Emission Control-- Nitrogen Oxides
330704 -- Emission Control-- Hydrocarbons
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTION KINETICS
COMBUSTION CHAMBERS
COMBUSTION KINETICS
DESIGN
DIESEL ENGINES
ENGINES
EXHAUST GASES
FLUIDS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
GASEOUS WASTES
GASES
HEAT ENGINES
HYDROCARBONS
INTERNAL COMBUSTION ENGINES
KINETICS
MIXING
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
REACTION KINETICS
SPRAYS
VEHICLES
WASTES