This paper describes a nonintrusive transducer for the measurement of crankshaft torque and speed on internal-combustion engines. The transducer is added to an existing drive train without requiring drive train modifications. Two non-contacting encoder-magnetic pickup combinations detect the phase angle between the pulse trains, which is a measure of the engine torque. A digital circuit, which includes a microprocessor, samples and processes the raw torque data. The concept provides for stable transducer operation independent of motor speed and varying ambient temperatures. The results from experiments on an eight-cylinder Diesel engine demonstrate that crankshaft torque and speed variations are detected with high resolution and detail, permitting on-line diagnostics including fault detection on individual cylinders.


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    Title :

    On-Line Cylinder Diagnostics on Combustion Engines by Noncontact Torque and Speed Measurements


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1989



    Publication date :

    1989-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    On-line cylinder diagnostics on combustion engines by noncontact torque and speed measurements

    Mauer,G.F. / Watts,R.J. / Univ.of Nevada,US et al. | Automotive engineering | 1989




    On-line determination of available torque in internal combustion engines

    Mauer,G.F. / Univ.of Nevada,US | Automotive engineering | 1991