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IMES is a privately owned company founded by Stefan Neumann in 1996. It based in the town of Kaufbeuren, in the picturesque Allgäu region of Bavaria, Southern Germany. IMES specializes in electronic measurement, monitoring and testing of cylinder pressure on engines and compressors, based on its high precision TION thin film pressure sensors.

IMES counts all the world’s major engine manufacturers among its customer base and IMES sensors, electronic pressure indicators and combustion monitoring systems are employed on a wide range of diesel, gas and dual-fuel engines, on ships and locomotives and in power and cogeneration plants and pipeline compressor stations all around the world.
Press Release, November - 2019

Marine diesels working cycle monitoring on the base of IMES GmbH pressure sensors data


Stefan Neumann
IMES GMBH, Germany

R. A. Varbanets & O. I. Kyrylash
Odessa National Maritime University, Ukraine

ABSTRACT: The paper presents algorithms for marine diesel engines’ working process monitoring designed by analyzing data obtained with IMES pressure sensors. Main features and properties of IMES sensors and EPM-XP monitoring system, used for 2- and 4-stroke modern marine diesel engines, are presented here. The pressure-time diagrams were taken as a basis for creating algorithms for marine diesel engines’ working process monitoring. The task of preliminary calculation of top dead center position (TDC) of a cylinder was fulfilled using polytropic compression equation. The TDC position was calculated using the equation P' = 0. Then we determined the algorithm for calculating the average indicator pressure and the indicator power of the cylinder. The CFD methods show how indicator valve channel influences the results of marine diesel engines’ working process monitoring. Using the example of compression curves in a cylinder, we can show amplitude and phase distortions introduced into pressure measurements by the indicator valve channel. Such research work is important and actual in time due to the use of marine diesel portable performance analysis systems.