The Influence of Overall Equivalence Ratio and Degree of Stratification on the Fuel Consumption and Emissions of A Prechamber, Stratified-Charge Engine 790438

An experimental study of a divided-chamber, stratified-charge engine has been performed using a modified CFR L-head engine. Emissions and fuel consumption were measured over a wide range of overall fuel-air ratio and degree of stratification by varying the prechamber and main chamber inlet fuel-air ratios. High-speed motion pictures of the combustion process and the spatial distribution of fuel-air ratio in the combustion chamber, measured using a sampling valve, were used to explain the trends in the emissions data. Of particular interest is an increase in NOx emissions with increasing degree of stratification at lean overall fuel-air ratios.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.