| MISFIRE FAULT DIAGNOSIS OF RANGE EXTENDER BASED ON HARMONIC ANALYSIS |
| Xiaowei Xu1, Zhenxing Liu1, Jiangdong Wu1, Jiaming Xing1, Xiaoqing Wang2 |
1Wuhan University of Science and Technology
2Jacksonville State University |
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| ABSTRACT |
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For an Extended-Range Electric Vehicle (E-REV), the misfire failure of the range extender can result in
working condition deterioration, mileage decrease, vibration and noise increase, and other adverse consequences. The
relationship of the shaft instantaneous angular speed (IAS) signal and the misfire fault of the range extender was studied by
harmonic analysis. Based on the theory of shafting torsional vibration, the range extender dynamics model was developed to
analyze the changing trend of the shaft IAS theoretically. Then, the shaft IAS signal under different working conditions was
simulated using a developed range extender rigid-flexible hybrid multi-body dynamics model. It is found that the 0.5-order
harmonic phase and the amplitude of range extender IAS can be used as the characteristic parameters in misfire fault
diagnosis, which has been verified by experiments on an engine bench. |
| Key Words:
Electric vehicles, Fault diagnosis, Harmonic analysis, Power system dynamics |
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Corresponding Author.
Xiaoqing Wang , Email. 
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