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.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Multi-scale analysis for engine momentary crankshaft speed


    Contributors:
    Minggao Yang (author) / Jianqiu Li (author) / Xiaodong Lu (author)


    Publication date :

    1999-01-01


    Size :

    414639 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Multi-scale Analysis for Engine Momentary Crankshaft Speed

    Ouyang, M. / Li, J. / Lu, X. et al. | British Library Conference Proceedings | 1999


    Momentary engine speed signal measurement: noise analysis and compensation

    Jianqiu,L. / Minggao,Y. / Tsinghua Univ.,CN | Automotive engineering | 2000


    Momentary Engine Speed Signal Measurement: Noise Analysis and Compensation

    Jianqiu, L. / Minggao, Y. / SAE | British Library Conference Proceedings | 2000


    Momentary Engine Speed Signal Measurement: Noise Analysis and Compensation

    Jianqiu, Li / Minggao, Yang | SAE Technical Papers | 2000