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METHODOLOGY OF DETERMINING THE DEGREE OF INTERNAL RECIRCULATION

Abstract

Taking into account the increasingly urgent issues of environmental protection, measures aimed at reducing the toxicity of exhaust gases of piston engines while increasing reliability, as well as reducing the metal intensity and theirs cost, are especially important. The designs of modern engines with variable valve distribution phases make it possible to increase the proportion of neutral combustion products in the working mixture without using an external recirculation system. But in this case, is required some objective indicator to assess the degree of internal recirculation. As such, the use of the proportion of residual gases in the working mixture is proposed. To find it, it is necessary to analyze the processes of gas exchange (and therefore to calculate the duty cycle of the engine) basing on the ratios of the partial volumes of the components of the working mixture.

The article outlines the basics of the proposed approach and presents the results of the first experimental determination of the degree of internal recirculation.

About the Authors

Anastacia Shagan
MADI
Russian Federation

student



Pavel V. Safronov
MADI
Russian Federation

Ph.D., associate professor



Leonid M. Matiukhin
MADI
Russian Federation

Ph. D., professor



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ISSN 2409-7217 (Online)