Abstract
Development of an engine fueled by hydrogen calls for a modeling tool suitable for employment of experimental experience to accelerate the engine optimization. The interaction between new simulation tools, previous results of experiments and future prospects of hydrogen engine is presented concerning the multizone Eulerian model. The results of modeled velocity, concentration and temperature fields are demonstrated. Main known problems of hydrogen-fueled engine, especially chemical properties of hydrogen as an fuel concerning knocking properties and possible concepts of an engine counteracting to the aftermaths of low calorific value of a lean mixture, its ignitability and rough combustion are listed.