THEORETICAL FOUNDATIONS AND PROCEDURE OF THE ANALYSIS OF PROCESS OF COMBUSTION OF SHIP INTERNAL COMBUSTION ENGINES ACCORDING TO INDICATOR DIAGRAMS
The accurate information about fuel combustion process in engines is required for improvement of ship diesel engines and systems of their diagnostics. The article deals with thermodynamic foundations and a procedure of more precise calculation of characteristics of heat release from combustion according to experimental indicator diagrams. The term “effective heat” is suggested estimating the duration of combustion by a position of “quasiadiabatic point” of the characteristic of effective heat. Some reasons of errors in the initial data are researched for the analysis of indicator diagrams. In particular, inaccuracies are described in specifying of cyclic supply of fuel and measurement of current pressure in an engine cylinder while recording the indicator diagram. The ways of correcting the specified initial data are suggested and justified for the purpose of recording the specified errors. The practical application of the suggested procedure and relevant program of indicator diagrams analysis are maintained to provide the required quality of research results of various factors in fuel combustion process in a diesel engine and contribute to the high quality of its diagnostics.