Gerasymchuk I. The influence of internal combustion engine working process with power control using individual cycle cut-off on nitrogen oxides concentration

In this thesis the author made evaluation and analyzed the internal combustion engines of new generations from which the engine with principally new method of power control with individual cut-off method (ICE) was distinguished. The algorithm of ICE work was adapted and worked out with the help of computer programming, accordingly selected the optimal cycle input for every work cycle. The formula for definition of atomic oxygen balance constant К0 was adapted in the mathematical model for determination of nitrogen oxide output in ICE work cycle. The system of automatic gas sampling was developed, produced and adapted for ICE and could support one-time, multiple and continuous gas sampling. The author developed technique of determination of nitrogen oxides NOx in gas sample which was taken directly from engine cylinder with the help of electromagnetic gas sampling valve, as well as from exhaust manifold. Concentration of nitrogen oxides NOx in work cycle next to cut-off is considerable lower from 25 up to 40 %, compared to work cycle of normal engine functioning.