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The paper deals with an application of advanced simulation methods to modeling of hydrogen fueled engines. Two models have been applied - 0-D algorithm and CFD. The 0-D model has been based on GT-Power code. The CFD model has been based on Advanced Multizone Eulerian Model representing general method of finite volume. The influence of main engine parameters, e.g. air excess, spark timing, compression ratio, on NOx formation and engine efficiency has been investigated. Both models have been calibrated with experimental data. Examples of results and comparison with experiments are shown. The means of reducing NOx formation are discussed.

The paper deals with the simulation of properties of IC engine equipped with a chemically inert porous media (PM) to homogenize and stabilize the combustion of CI engines. The purpose of the PM matrix use is to ensure reliable a ignition of lean mixture and to limit maximum in-cylinder temperature during combustion. It is aimed at NO formation reduction. The influence of PM on an engine cycle is examined by means of CFD simulations. Results demonstrating the influence of heat accumulation, heat supply during compression and expansion strokes and self-ignition properties of a fuel on the engine cycle are presented. All simulations involve modeling of NO formation. The homogenization capability and the flame stabilization one of the PM are discussed.