Improving the tests of catalytic converters accounting for the relationship between the composition of the working mixture entering the engine combustion chamber and CO and CH in exhaust gases

Abstract

Abstract The article presents results of the study aimed to establish the relationship between the working mixture entering the engine combustion chamber and CO and CH in the exhaust gases. On the basis of the theory of fuel combustion in the engine chamber and the systematic approach, and using the mathematical methods, the fuel combustion in the combustion chamber is analyzed at low ambient temperatures to decrease emissions of carbon monoxide and hydrocarbons. The criterion for optimizing the tests of catalytic converters is substantiated for low temperatures - temperatures of the heat flow of the mixture at the exit from the combustion chambers of the engine cylinder. The limitation is the warm-up time of the catalytic converter when testing it on vehicles operating at low temperatures and the standards for the content of CO and CH in the exhaust gases of a passenger car engine. The application of the methods and the mathematical model can be the basis for supplementing UNECE Regulation No. 83-06 and improving the VI type test method for vehicles operating at low ambient temperatures.