Экспериментальные исследования изменения коэффициента избытка воздуха и свободного кислорода в отработавших газах бензинового ДВС

Abstract

The operation of the internal combustion engine in areas of poor and rich mixture is characterized by a decrease in the efficiency of the catalytic converter and increase in the degree of wear of the system of elements fuel supply systems, ignition and antitoxic systems. Current trends of shifting the operation of the internal combustion engine to the area of poor mixtures. leads to increased emissions of NO and CO2, deterioration of the combustion process. The diagnostic parameters, which are free oxygen and the excess air coefficient, were theoretically determined and selected for the research. The regularity of the change in O2 at 20 % and 40 % of the throttle opening from the resistance of the exhaust tract and the spark plug gap with varying injection time duration has been established. Experimental control of the parameter l showed a trend of having a maximum in the zone of injection durations, and a gradual decrease when shifting to the zone of long injection durations to the limits of the efficiency of the internal combustion engine. An increase in the resistance of the exhaust tract leads to an equidistant shift of the characteristics l upwards into the zone of large values l while significantly reducing the range of the engine performance.