Study of oxygen-enriched combustion character on gasoline engine at cold-start

An investigation on the effects of oxygen-enriched combustion air on engine performance was extended to include the implications from the second law of thermodynamics. The use of oxygen enriched combustion air will have a direct affect on the combustion process and on the overall engine thermodynamics. For example, for cases with higher inlet oxygen concentration (and hence less nitrogen dilution), for the same operating conditions, the combustion gas temperatures and engine cylinder heat losses will be higher. Results include detail thermodynamic results of temperatures, pressures and properties as functions of the oxygen concentration of the combustion air. Other comparisons are reported.