THE INSTRUMENTAL ACCURACY OF KNOWN FORMULAS FOR THE CONVERSION OF OPACITY INDICATORS INTO INDICATORS OF TOXICITY OF EXHAUST GASES OF RECIPROCATING ICE

Abstract

The article analyzes the nomenclature of the most widely used indicators of opacity of exhaust gases of reciprocating internal combustion engines and mathematical apparatuses of known formulas for conversion of indicators of opacity and toxicity of exhaust gases, from which the conversion formula of Prof. Igor Parsadanov as such, which takes into account not only the opacity indicators, but also the indicators of the toxicity of exhaust gases was selected. The analysis and transformation of the selected conversion formula was carried out, and the peculiarities of the influence on the magnitude of the physical value of the independent variables obtained by it were revealed. A method of calculating the instrumental accuracy of obtaining the mass hourly emission of particulate matters with the flow of exhaust gases according to the researched conversion formula in two successive approximations has been developed. According to the results of the calculated study according to the developed methodology for the basic indicator of the opacity of the exhaust gases and the passport accuracy of the measuring equipment, it was established that the average value of such accuracy was ±8.3 % for the special regimes of operation of the reciprocating internal combustion engine. The influence of the type of exhaust gas opacity indexes with its corresponding measurement units on the instrumental accuracy of the studied conversion formula was identified and analyzed. According to the sign of the value of such accuracy for the passport accuracy of the measuring equipment, the known indicators of opacity of exhaust gases are ranked.