Fault Diagnosis of Intake System of Diesel Engine Based on LOLIMOT

doi:10.3969/j.issn.1000-1093.2017.08.001

Abstract

Abstract: Leakage and blocking of intake system of diesel engine may lead to the deterioration of the emissions and fuel economy. An accurate model of intake system is difficult to be established since it is a strong nonlinear system. Thus, a fault diagnosis method based on local linear model tree (LOLIMOT) is proposed for on-line fault diagnosis.The amplitude and phase of intake pressure fluctuation signal and volumetric efficiency are selected as the fault characteristic parameters. LOLIMOT is used to establish the reference models of the parameters. The models are regarded as a function of engine speed and intake density.Three residual signals are generated by using parity equation for calculating their threshold values. The mapping relationship between the residual signal and the fault type is analyzed. Experimental results show that the proposed models give good prediction of fault characteristic parameters, the proposed method can be to diagnose the leakage of engine intake system and the blocking of intercooler. Key

Key words: powermachineryengineering, intakesystem, degradationfault, locallinearmodeltree, faultdiagnosis

CLC Number:

WANG Ying-min， CUI Tao， ZHANG Fu-jun， DONG Tian-pu. Fault Diagnosis of Intake System of Diesel Engine Based on LOLIMOT[J]. Acta Armamentarii, 2017, 38(8): 1457-1468.

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第38卷
第8期2017 年8月兵工学报ACTA
ARMAMENTARIIVol.38No.8Aug.2017

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