Energy efficient improvement and bringing to conformity with long-term environmental safety requirements are considered as an important stage to improve ship engines. The values of the mentioned characteristics are mostly determined by the type of consumed fuel and organization of operational process that in turn conditions the intensity of the process of combustion and heat release in the cylinder. And these parameters are the determined factors in the view of improving the technical and economic performance of diesel engines. From this point of view, at this stage conversion some types from the ship diesel engine cycle into the gas diesel engine cycle.
The paper aims to determine the heat release characteristics on the basis of theoretical and experimental analysis of ship engine performance when implementing the operational process of both diesel engine and gas diesel engine cycles. The given paper dwells on comparative characteristic and efficiency analysis of diesel engine and gas diesel engine cycles, on the basis of experimental modeling.