Diesel Engine Injector Faults Detection Using Acoustic Emissions Technique

Elamin, Fathi, Gu, Fengshou and Ball, Andrew (2010) Diesel Engine Injector Faults Detection Using Acoustic Emissions Technique. Modern Applied Science, 44 (9). pp. 3-13. ISSN 1913-1844

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Abstract

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.

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