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.
Original language | English |
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Pages (from-to) | 1457-1468 |
Number of pages | 12 |
Journal | Binggong Xuebao/Acta Armamentarii |
Volume | 38 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1 Aug 2017 |
Keywords
- Degradation fault
- Fault diagnosis
- Intake system
- Local linear model tree
- Power machinery engineering