Title :
Multi-scale analysis for engine momentary crankshaft speed
Author :
Yang, Minggao ; Li, Jianqiu ; Lu, Xiaodong
Author_Institution :
Tsinghua Univ., Beijing, China
fDate :
6/21/1905 12:00:00 AM
Abstract :
Misfire detection or cylinder by cylinder variations feedback using momentary crankshaft speed is practical for certain engine conditions such as idle speed. It is still a difficult problem at high speed and transient condition. Aiming at that remaining challenge, this paper presents a new tool wavelet transform to process the momentary crankshaft speed. The multi-scale (or multiresolution) analysis of the speed signal at different engine operating condition is presented. The speed fluctuations between normal combustion and misfire are compared. The results indicate that wavelet transform is a suitable tool to process the speed signal and it paves a new way to achieve misfire detection at high or transient speed condition
Keywords :
angular velocity; fault location; feedback; internal combustion engines; signal processing; wavelet transforms; cylinder variations feedback; engine conditions; engine momentary crankshaft speed; engine operating condition; idle speed; misfire; misfire detection; multi-scale analysis; multiresolution analysis; normal combustion; speed filter; speed fluctuations; wavelet transform; Acoustic noise; Combustion; Engine cylinders; Feedback; Fluctuations; Signal analysis; Signal processing; Steady-state; Torque; Wavelet transforms;
Conference_Titel :
Vehicle Electronics Conference, 1999. (IVEC '99) Proceedings of the IEEE International
Conference_Location :
Changchun
Print_ISBN :
0-7803-5296-3
DOI :
10.1109/IVEC.1999.830617
