Himchenko A. Improvement of fuel economy profitability and decrease of toxicity of petrol two-stroke engines on partial modes

The dissertation is devoted to improvement of fuel economy and decrease of harmful emissions of the petrol two-stroke engines by use of variable compression ratio on partial modes. The complex of mathematical models of working processes of the two-stroke petrol engine with a replaceable ratio of compression on partial modes is developed: a technique of definition of parameters of the purge compressor - the lower part the cylinder of the piston group and a crank chambers; a method of calculation charging the purge compressor by a fresh charge during filling, in which basis the fixed differential equations of power and mass balance; a design procedure of a running cycle in the cylinder of the engine on the basis of a method prof. I.I.Vibe; the closed model of calculation of the engine which in a complex allows to find out influence of a variable compression ratio on design data and parameters of the engine. Rated-experimental researches of influence of a variable compression ratio on parameters of enginerun on partial modes are executed. Sizeable fuel economy of the engine, and also decrease of toxicity on emissions CO and СН is received at regulation of compression ratio on partial modes.