By using engine controlled gear shifting, a manual transmission can be automated without using the clutch during the shift event.The main contribution of this paper is a novel extension of the existing system using active handling of driveline resonances. The strategy is based on a model of the transmission torque, which is derived by using experimental data from a heavy truck. A key step is the design of a criterion for a controller that drives the transmission torque to zero with damped resonances and with a control signal realizable by the engine.The proposed solution offers a possibility to optimize the time needed for a gear shift, which is important since the vehicle is free rolling when in gear-shift condition. Furthermore, neutral gear can successfully be engaged also when facing initial driveline oscillations and load disturbances.


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    Title :

    Transmission-Torque Control for Gear Shifting with Engine Control


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1997



    Publication date :

    1997-02-24




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Transmission-torque control for gear shifting with engine control

    Pettersson,M. / Nielsen,L. / Linkoeping Univ.,Vehicular Systems,SE | Automotive engineering | 1997



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