Diesel Engine Injector Faults Detection Using Acoustic Emissions Technique
Diesel Engine Injector Faults Detection Using Acoustic Emissions Technique
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DOI：
10.5539/mas.v4n9p3
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发表时间：
2010-08
影响因子：
3.5
通讯作者：
F. Elamin;F. Gu;A. Ball
中科院分区：
文献类型：
--
作者：
F. Elamin;F. Gu;A. Ball
研究了利用声发射(AE)技术识别JCB 444T2柴油机喷油器故障的方法。在四缸、四冲程和涡轮增压发动机上，各种喷油器故障都被埋下了种子。然后，对故障喷油器进行测试，以评估基于声发射的喷油器故障检测。对试验记录到的声发射信号进行了角频域、频率域和联合角频域的处理。联合角频分析的结果表明，声发射信号具有较高的信噪比，可以很好地监测燃烧过程的变化，而其他振动声源的影响很小。利用声发射信号的特征，可以在发动机运行过程中识别喷油器的故障。
This study focuses on investigation of the method of identifying injector faults in a JCB 444T2 diesel engine using acoustic emission (AE) technique. Different kinds of injector faults were seeded in the four-cylinder, four-stroke, and turbo-engine. Then, faulty injectors are tested to evaluate AE based injection fault detection. The AE signals recorded from the tests were processed in the angular, frequency and joint angular-frequency domain. The results from joint angular-frequency analysis have shown that AE can clearly monitor the changes in the combustion process due to its high signal to noise ratio, where other vibro-acoustic sources have little influence. Using features in the AE signal, faults of injector can be identified during the operation of the engine.