Parametric studies of performance and NO/sub x/ emissions of the three-valve stratified charge engine using a cycle simulation

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6536064

Wall, J C; Heywood, J B; Woods, W A

The trade-off between engine operating efficiency and NOx emissions in the prechamber three-valve stratified-charge engine was examined in a series of parametric studies using an improved model developed at M.I.T. Engine geometric, operating, and combustion parameters were varied independently and the effects on brake-specific-fuel-consumption, exhaust temperature and brake-specific-NO observed. Parameters chosen for study are: timing of the start of combustion, overall air-fuel ratio, prechamber air-fuel ratio at the start of combustion, main-chamber combustion duration, prechamber size (prechamber volume and orifice diameter), EGR (in main and prechamber intakes), and load. The results quantify trade-off opportunities among the design and operating variables which are available to the engine designer.

• OSTI ID: 6536064
• Report Number(s): CONF-780208-73
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
AIR POLLUTION ABATEMENT
AUTOMOBILES
CHALCOGENIDES
ENGINES
EXHAUST GASES
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
POLLUTION ABATEMENT
SIMULATION
STRATIFIED CHARGE ENGINES
TESTING
VEHICLES
WASTES