Altitude controller influence on environmental and economic performance of NGV fuel-powered engines

Abstract

The relevance of research is conditioned by the need to ensure efficient operation of the internal combustion engine ICE on NGV fuel at different altitudes above sea level, where there is atmospheric air rarefaction up to 20÷25%. This direction is dictated by the fact that when transferring the ICE operation from gasoline to gas-engine fuel, the engine power decreases from 5 to 15%, moreover, the atmospheric air rarefaction leads to an even greater reduction in engine power and ultimately reduces the performance of the vehicle. Due to violation of the process of combustion of gas-air charge in the cylinder is formed a large amount of carbon monoxide (CO). Research objective is to develop and propose a method of providing such a stoichiometric, fractional composition of the gas-air charge, which will ensure the restoration of the lost power of ICE and provide the optimal value of traction-dynamic characteristics of the car, without increasing toxic emissions. Research object: Variable crosssectional area of the intake manifold path (ICE), adjustable lumen for atmospheric air intake, atmospheric air pressure sensors adjustable diaphragm with stepper motor. Research methods: analytical modeling of the relationship of the aperture diameter depending on the altitude of the terrain above sea level, on the number of revolutions of the ICE, on the density and temperature of the ambient air. The process of combustion of the gas-air charge in the combustion chamber will be evaluated by the fractional composition of the exhaust, exhaust gases. Research results: Qualitative and quantitative assessment of the application of altitude corrector on the ICE operation mode, stability of the value of excess air ratio at different altitudes above sea level, formation of toxic gas, carbon monoxide, as well as carbon dioxide, hydrocarbon, oxygen, etc. is given.