Development of a time-scale interaction combustion model and its application to gasoline and diesel engines.

Abstract: The combustion processes of both gasoline and diesel engines are becoming similar, as a result of the application of direct fuel injection to the former and the reduction of the compression ratio of the latter. A novel time-scale interaction (TI) combustion model has been developed for simulating combustion phenomena with high accuracy, ranging from premixed charge combustion to diffusion combustion. This model is based on reasonable combustion regimes, taking into account the characteristic time scales of the chemical reactions and turbulence eddy break-up. The accuracy of the TI combustion model was validated by applying it to gasoline and diesel IC engines under a wide range of operating conditions. Comparisons of measured and calculated heat release rate patterns and cylinder pressure histories showed good agreement for both gasoline and diesel IC engines. [Copyright &y& Elsevier]