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The modeling of in-cylinder processes in internal combustion engines using combustion models such as the two-zone Vibe model, AVL MCC, and fractal combustion models—based on mathematical formulations—is widely regarded as an effective approach for capturing the complex and multidimensional nature of flame propagation.

Multizone combustion models for spark-ignition engines enable the estimation of heat release rates under homogeneous mixture conditions, while accounting for key parameters influencing mixture formation and combustion development. These include intake system characteristics, combustion chamber geometry, injection system properties, injection and ignition timing, cylinder charge composition, large-scale flow motion, and turbulence intensity.

Unlike classical approaches that assume smooth and continuous flame fronts, multizone models incorporate flame surface distortions caused by turbulence, offering a more accurate representation of combustion dynamics, particularly in transient operating regimes.

This study aims to perform a comparative analysis between a classical two-zone Vibe combustion model and more advanced models incorporating engine-specific parameters. The models were implemented in the AVL Boost environment and validated using the 1.2 TCe (H5Ft) engine developed by Renault, whose key geometric and constructive characteristics served as input data for the simulations