Fuel injection characteristics and combustion behavior of a direct-injection stratified-charge engine

Book · Sun Jan 01 00:00:00 EST 1984

OSTI ID:6045098

Balles, E N; Ekchian, J A; Heywood, J B

High levels of hydrocarbon emissions during light load operation keep the direct injection stratified charge engine from commercial application. Previous analytical work has identified several possible hydrocarbon emissions mechanisms which can result from poor in-cylinder fuel distribution. Poor fuel distribution can be caused by erratic fuel injection. Experiments conducted on a single cylinder disc engine show a dramatic increase in the cycle to cycle variation in injection characteristics as engine load decreases. This is accompanied by an increase in cycle to cycle variation in combustion behavior suggesting that degradation in combustion results from the degradation in the quality of the injection event. Examination of combustion and injection characteristics on a cycle by cycle basis shows that, at light load, IMEP and heat release do not correlate with the amount of fuel injected into the cylinder. There are strong indications that individual cycles undergo partial or complete misfire.

• OSTI ID: 6045098
• Report Number(s): SAE-TP-841379
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
54 ENVIRONMENTAL SCIENCES
HYDROCARBONS
AIR POLLUTION
STRATIFIED CHARGE ENGINES
COMBUSTION KINETICS
EMISSION
FUEL INJECTION SYSTEMS
BENCH-SCALE EXPERIMENTS
COMBUSTION PROPERTIES
COMMERCIALIZATION
DYNAMIC LOADS
EXHAUST GASES
PERFORMANCE
CHEMICAL REACTION KINETICS
ENGINES
FLUIDS
FUEL SYSTEMS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
KINETICS
ORGANIC COMPOUNDS
POLLUTION
REACTION KINETICS
WASTES
330101* - Internal Combustion Engines- Spark-Ignition
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)