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The paper provides a proposal of a quantitative interpretation of operation which (as the operation of Hamilton andMaupertius presented in classical mechanics and the operation issuing from change of the body momentum) is consideredas a physical quantity with the measurement unit called a joule-second [joule × second]. An original method foranalyzing and estimating the engine operation has been demonstrated in the energetic aspect for the operating needs. Thehomogenous Poison process and semi-Markov process have been herein applied to justify the usability of such interpretedoperation. The two processes have made it possible to formulate a model deterioration of the diesel engine operationover time. Thus, the model is a random Poisson process or semi-Markov process. It has also been shown that the integralcalculus can be (and should be) applied to identify the energetic properties of an engine. Considerations on the energeticaspect of diesel engine operation are provided on the example of marine engines of a ship’s main propulsion system.

Energetic aspect of diesel engine operation