Effect of Burning Zone A/F, Fuel H/C on Soot Formation and Thermal Efficiency

In engine combustion chambers, where the overall fuel-air mixture is stoichiometric or leaner, the effect of localized pockets or zones of stoichiometric or richer mixture are presented. Possible explanations for the existence of CO, with soot in exhaust are offered. Also the effect of localized zones of richer than stoichiometric have on the thermal efficiency are also presented. Experimental data from literature are used to support the ideas.