Expert System for Diagnosis and Optimisation of Marine Diesel Engines

The doctoral, thesis: “Expert System for Diagnosis and Optimisation of Marine Diesel Engines” is the result of many years of extensive practical and theoretical work on problems in the field of testing marine diesel engines and incorporating new technology during diagnosis. This work deals with problems of a complex analysis and testing a system of Diesel engine parameters, pointing out engine working cycle characteristics. The Expert system - EKSE has been developed to analyze and to research engine behavior especially regarding the working cycle and diagnostic system of engines and to optimize engine performance as well as increase efficiency. EKSE includes corrections of parameters under standard ambient conditions by a method developed on the basis of ISO standards. A diagnostic model has been developed for application in marine slow-speed, 2-stroke Diesel engines. A thermodynamic analysis of the working cycle has been carried out on the engines with direct injection. From the results, conclusions about the engine working cycle efficiency have been drawn, showing also the possibility of how to obtain optimizations. The most important results of combustion process have been compared using the correlations by Vibe and Watson-Piley-Marzouk. An expert system of diagnosis and control of Diesel engines gives results of the analysis of important parameters for a 2-stroke marine Diesel engine which serves as a basic technological know-how. EKSE could give best results during implementation on the newly developed, electronically controlled marine engines. * Defended Doctoral Thesis (2004.