Ovchynnikov D. Improving the performance of modern gasoline engines by rational use of bioethanol additives to gasoline

Quite a lot of works has been devoted to the use of bioethanol additives to gasoline both in our country and abroad. Most studies, closest in nature to this work, were limited to adding 20% bioethanol to gasoline for cars without additional design changes. Based on statistical data (annual statistical collections, reporting forms of the State automobile inspectorate) in the structure of the fleet is a fairly small percentage of adapted cars that can run on gasoline with a high content of alcohol compounds without significant changes in technical and operational indicators, and a large share of military equipment throughout the country and the share of passenger cars of outdated design equipped with a carburetor power system should not be excluded. So, taking into account the above facts, the research of the effect of large bioethanol additives to gasoline both on cars of outdated design equipped with a carburetor power supply system, and on cars with an injection system and feedback is quite relevant. According to the results of theoretical research, differences were have shown between commercial gasoline A-95 and bioethanol, which is the main component of alcohol compounds in mixed gasoline A-95E40, which affect the main performance of the engine. The obtained dependencies made it possible to clarify the existing model of car movement according to the modes of the New European Driving Cycle for working on A-95 gasoline and A-95E40 mixed gasoline for a car with an injection system and a car with a carburetor power system. Keywords: Mixed gasoline, bioethanol, alcohol compounds, fuel-air mixture impoverishment, main dosing system regulation, environmental performance, fuel economy, gasoline engine, carburetor, injection system, feedback.