The fault diagnosis method of abnormal combustion engine valve clearance based on Teager energy operator

doi:10.16731/j.cnki.1671-3133.2018.10.024

Abstract

Abstract: In order to study the abnormal valve clearance fault diagnosis method,by the simulation and experiment study,the core components of the gas distribution has been modeled in ADAMS,and the dynamic behaviors with different valve clearance has been simulated,in order to study the fault mechanism and the sensitive feature.Based on Teager energy operator,the accurate method to extract the sensitive feature from the actual vibration signal has been explored.This fault has been simulated in the TBD234 combustion engine test stand,vibration signal acquired.With the increasing of clearance,the phase of valve opening holds off,the phase of shutting is ahead of time,and the amplitude increases,which verifies the sensitivity of fault feature and effectiveness of the diagnosis method.

Key words: fault diagnosis, abnormal valve clearance, impact extraction, combustion engine

CLC Number:

TH17

Zhang Xiaofan, Wu Yalong, Yao Ziyun, Mao Zhiwei, Jiang Zhinong. The fault diagnosis method of abnormal combustion engine valve clearance based on Teager energy operator[J]. Modern Manufacturing Engineering, 2018, 457(10): 144-148.

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The fault diagnosis method of abnormal combustion engine valve clearance based on Teager energy operator

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