Abstract:
The advantages of homogeneous combustion in internal combustion (I.C.) engines are well known and many research groups all over the world are working on its practical realization. A new combustion concept that fulfils all requirements to perform homogeneous combustion in I.C. engines using the Porous Medium Combustion Engine, called “PM-engine” has been proposed. This is an I.C. engine with the following processes realized in a porous medium: internal heat recuperation, fuel injection and vaporization, mixing with air, homogenization, 3D thermal self-ignition followed by a homogeneous combustion. The main features of the PM-engine are the following:
i) Very low emissions level due to homogeneous combustion and controlled temperature in the PM-combustion zone (e.g. NOx between 100 and 300 mg/kWh for the (A/F) ratio from 1 to 5); CO can be reduced by several times (almost eliminated soot formation). ii) Theoretically higher cycle efficiency due to similarity to the Carnot cycle. iii) Very low combustion noise due to significantly reduced pressure peaks. iv) Nearly constant and homogeneous combustion temperature field in the PM volume. v) Very fast combustion.
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