Abstract
When the vibration of diesel engine structure is measured, the signal is composed of a very complex superposition of the contributions of different vibratory sources modified by their respective transmission paths. These sources originate from several internal phenomenon in the engine such as combustion pressure variation, unbalanced reciprocating and rotating parts. In a diesel engine, movement parts work in a specific order. Once the starting point is determined, occurrence of work order in different cycle phases can be determined. This could successfully use to identifying of impulses in complex vibration signal of a diesel engine. From the variation of features of those impulses, it is possible to determine the working condition of the engine. This can use to fault diagnosis of diesel engine, specially faults related to combustion process.
Highlights
Diesel engines are most widely used power plant in the world with wide range of applications
Once the starting point is determined, occurrence of work order in different cycle phases can be determined. This could successfully use to identifying of impulses in complex vibration signal of a diesel engine
From the variation of features of those impulses, it is possible to determine the working condition of the engine. This can use to fault diagnosis of diesel engine, specially faults related to combustion process
Summary
Diesel engines are most widely used power plant in the world with wide range of applications. Fuel timing, valve timing are some of popular topics when discuss about multi-cylinder diesel engines This implies that many activities happening inside the engine has an order in time. In facts position of a piston, occurrence of firing in a cylinder, starting of fuel delivery to combustion chamber, opening and closing of valves can be given in degrees of crank angle referring to a cylinder. This can used to identify the vibration impulses related to activities in the engine and asses the condition of the engine. Many studies has been carried out on this regard and purpose of this paper is to provide an overview on co-relation of time order activities in diesel engines with vibration signatures and discuss effective ways of use vibration to fault detection in diesel engines based on literatures available on the topic
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