Burn modes and prior-cycle effects on cyclic variations in lean-burn spark-ignition engine combustion

Conference · Thu Dec 31 23:00:00 EST 1987

OSTI ID:6557250

Martin, J K; Plee, S L; Remboski, Jr, D J

Cyclic variation is examined by: (1) conditional grouping and heat-release analysis to reveal different modes of combustion, (2) considering the order in which the burn modes occur to establish prior-cycle effects and (3) comparing the measured variation in IMEP with data generated by simple models. Results show that several burn modes may exist, particularly under fuel-lean conditions. Prior-cycle effects also become more obvious as the air-fuel ratio is increased. Finally, comparisons with data generated by simple models show that the nature of cyclic variation may range from completely stochastic to a superposition of a non-chaotic deterministic process on a stochastic process.

• OSTI ID: 6557250
• Report Number(s): CONF-880241-
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
CHEMICAL REACTION KINETICS
COMBUSTION CONTROL
COMBUSTION KINETICS
CONTROL
ENGINES
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
KINETICS
MATHEMATICAL MODELS
OPERATION
REACTION KINETICS
SPARK IGNITION ENGINES
STOCHASTIC PROCESSES
VARIATIONS