This paper presents a new metric for the nonuniformity of the torque random process of a reciprocating internal combustion engine. The proposed metric is derived from the torque 2N extrema which occur within each engine cycle for an N-cylinder engine. A 2N-dimensional vector is obtained for each cycle, which represents torque nonuniformity. The proposed metric is either the 11 or 12, norm for this vector. It is shown in this paper that this metric satisfies several properties which are desirable for quantitatively representing torque nonuniformity. Moreover, this metric is computed once each engine cycle and is, therefore, a quasi-real time measure of torque nonuniformity. This metric has several potential applications in electronic engine control systems.


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    Title :

    A New Metric for Torque Nonuniformity


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1983



    Publication date :

    1983-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    A New Metric for Torque Nonuniformity

    Ribbens,W.B. / Univ.of Michigan,Dept.of Electr.and Comput.Engng.,US | Automotive engineering | 1983




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    Ribbens,W.B. / Univ.of Michigan,Dep.of Electrical Engineering and Computer Science,Vehicular Electronics Lab.,US | Automotive engineering | 1985