Fundamental investigations of marine engines turbochargers diagnostic with use acceleration vibration signals

Abstract

Supervision of technical state is often limited to the thermodynamic parameters, so there are happening gradual and sudden failures to leading a state of unfitness of the entire piston combustion engine. The article presents the results of principal diagnostics investigations of turbochargers carried out in laboratory and ships conditions of three types of four-stroke engines. In the preliminary investigations were aimed at choice of used work and residual processes, places of the locations of sensors, domain of signal analysis and diagnostic symptoms. In assessing diagnostic symptoms were checked for that sensitiveness to engine load, and the selected simulated technical states determined from reliability investigations. Selected vibration and thermodynamic processes were examined. Selected diagnostic symptoms and measures in preliminary examinations proved to be sensitive to the proposed locations of sensors, types and domains signals analyzes. Applied diagnostic symptoms in investigations have proven to be sensitive to the simulated nondestructive changes in the technical state in principal research. Some of thermodynamic symptoms and the acceleration vibration processes were recognized interesting too.