Karev S. Improvement of fuel efficiency and environmental performance of the gasoline engine with injection system and feedback

The main topic of the thesis is an improvement of fuel efficiency and environmental performance of multi-cylinder gasoline engines while using a combined method of power control and exhaust gas recirculation. There was developed a method and there was experimentally determined optimal rate of exhaust gas recirculation in mode which corresponds to the median of the European urban driving cycle for vehicles of M1 category. An experimental study of the engine 6CH9,5/6,98, which showed improvement of fuel efficiency and environmental performance applying the combined method of power control and exhaust gas recirculation. Indexing of workflow of the engine 6CH9,5/6,98 and calculated research on the mathematical model for calculating the parameters of the workflow confirmed that the application of exhaust gas recycling decreases the maximum temperature of the cycle and increases the total duration of combustion. Research results based on specified mathematical model of vehicle movement within European driving cycle modes showed that recycling of exhausts gas allows improving fuel efficiency and environmental performance of the vehicle equipped with modern gasoline engine while using a combined method of power control.