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The main purpose of this paper is to present the comparative diesel engine analysis of dynamical and energy efficiency performances, in different functioning situations. Other purpose of the paper is to establish engine static characteristics for stationary regime. It also establishes the mathematical models for engine functioning in stationary regime  and dynamic drive.

This issue will be solved using experimental researches on a powerful diesel engine, installed to the testing stand equipped with fitted sensors for functional parameters. The research data were captured, stored and processed.