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- W80293878 abstract "The aim of this thesis is to investigate whether other representation techniques of the in-cylinder pressure signal, besides the current pressure-crank angle curve, have the potential of improving the diagnosis in a condition monitoring program. Investigated are the quantitative representation of the heat release through Vibe parameters and the analysis of a temperature-specific entropy diagram. These two alternative techniques are being discussed theoretically in the first part and are tested through simulations in the second part. Two pre existing MatLab models, functioning as the selected 12SW28 benchmark engine, are used to analyse pressure measurements collected from the Marinebedrijf. Three different situations are being discussed: a reference dataset, a dataset diagnosed with leaking injectors, and simulated blowby by an implemented subsystem in the models. For all three of these situations, the outcome in terms of p-alpha curve, Vibe parameters, and Ts curve are being compared. The output of the simulations seemed promising at first but unfortunately the consistency of output abnormalities raises doubts on whether the input parameters are all valid. To test this, five possible input errors are simulated and the effects are studied. The cause of the abnormalities, whether diesel engine faults or systematic errors, can not be determined in this thesis. This means that the potential of Vibe parameters and the Ts diagram, in terms of condition monitoring diagnostics, can not be determined based on this data. The current way of analysing the pressure signal is not really influenced by these possible errors. However, functioning as input for a heat release simulation model enlarges these errors, creating an unreliable output. Fixing these possible errors, and other structural shortcomings of the current condition monitoring program at the Marinebedrijf, will certainly improve the representation." @default.
- W80293878 created "2016-06-24" @default.
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- W80293878 date "2014-01-20" @default.
- W80293878 modified "2023-09-23" @default.
- W80293878 title "Optimizing diesel engine condition monitoring: Research on diagnostic representation techniques based on in-cylinder pressure measurement" @default.
- W80293878 hasPublicationYear "2014" @default.
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