The application of spectrum analysis of course of pressure in combustion chamber for diagnosis of medium speed marine diesel engines

In this work has been undertaken a study test the application course of combustion pressure signals in combustion chamber the marine medium-speed engine to diagnostic. In research has been used active experiment. The pressure signals analysis in cylinder has been carried out in amplitude and frequency domain, as new method for result processing. In preliminary research has been carried out with used marine engine 5BAH22 with current generator, be present in Engines Room Laboratory the Maritime Academy in Szczecin. Preliminary research has consisted in measurement the course of combustion pressure signals in individual cylinders and analysis the combustion pressure signals in time, amplitude and frequency domain at different engine load the combustion engine and has been checked that diagnostic parameters will be correlate with engine load. The current generator has been loaded with water resistor. The purpose of this work have been selected sensitive diagnostic symptoms and checked their usability in diagnosis marine diesel engine. In principal research has been simulated inability the turbocharger air filter as his mechanical impurities. Useful diagnostic symptoms have been determined. The method were being verified, execute operating research on working marine diesel engines at port and shipyard.