Performance and NO/sub x/ emissions modeling of a jet ignition prechamber stratified charge engine

Conference · Thu Jan 01 04:00:00 EST 1976

OSTI ID:6726114

Hires, S D; Ekchian, A; Heywood, J B; Tabaczynaki, R J; Wall, J C

The development of a cycle simulation model for the jet ignition prechamber stratified charge engine is described. Given the engine geometry, load, speed, air-fuel ratios and pressures and temperatures in the two intakes, flow ratio and a suitable combustion model, the cycle simulation predicts engine indicated efficiency and NO emissions. The relative importance of the parameters required to define the combustion model are then determined, and values for ignition delay and burn angle are obtained by matching predicted and measured pressure-time curves. The variation in combustion parameters with engine operating variables is then examined. Predicted and measured NO emissions are compared, and found to be in reasonable agreement over a wide range of engine operation. The relative contribution of the prechamber NO to total exhaust NO is then examined, and in the absence of EGR, found to be the major source of NO for overall air-fuel ratios leaner than 22:1.

• OSTI ID: 6726114
• Report Number(s): CONF-760278-31
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330700* -- Advanced Propulsion Systems-- Emission Control
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DATA
ENGINES
EXHAUST GASES
EXPERIMENTAL DATA
FLUIDS
FUEL-AIR RATIO
GASEOUS WASTES
GASES
HEAT ENGINES
INFORMATION
INTERNAL COMBUSTION ENGINES
KINETICS
MATHEMATICAL MODELS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OPERATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
REACTION KINETICS
STRATIFIED CHARGE ENGINES
THEORETICAL DATA
WASTES