Detection of Faults in Combustion Engines Through Indicators of Temperature and Injection Pressure

Abstract

The present work aims at proposing indicators for early detection of faults in the fuel-oil generator sets of internal combustion engines, using the injection pressure and temperature of the combustion chamber. As a case study, the generation groups of the Maintenance Company of Fuel-Oil Generating Sets (EMGEF), in the Cuban province of Granma, were evaluated. A multifactorial design was used for the experiment, using 16 engines as main factors, the 9 cylinders of each engine, and a working time of 3 years. The study demonstrated that pressure and temperature are significant indicators of engine failure, and that the number of detected faults from temperature were more significant than those reported from injection pressure. It is concluded that high temperatures in the cylinders are generally related to a high index of gases, and a poor state of the injectors. The differences between the pressures are related to low hermetism, and the technical state of the elements of the feeding system.