The problem of automating the gearshift process of a manual transmission without synchronizers is considered in this paper. The application is very interesting from an integrated powertrain control point of view, since it includes many different control tasks and encourages the use of modern control theory and the use of the engine as an actuator to the rest of the powertrain. The powertrain controller will have a supervisory function, coordinating the control of the engine and the transmission. The control laws for the gearshifting controller will include transmission torque control and engine speed control. The derived control laws are designed based on backstepping, a nonlinear model-based control design methodology. Simulations have shown good results for the gearshifting of an automated manual transmission. The shifting is smooth and does not introduce any major oscillations in the driveline. The total time for one shifting is approximately 0.6 s, which is good. The shifting is performed without any optimisation of design parameters, which will improve the performance a little bit further.


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    Title :

    Active engine control for gearshifting in automated manual transmissions


    Additional title:

    Aktive Motorregelung für Gangschaltung in automatisierten Wechselschaltgetrieben


    Contributors:

    Published in:

    Publication date :

    2003


    Size :

    15 Seiten, 9 Bilder, 1 Tabelle, 12 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Optimization of Gearshifting in Automatic Transmissions

    Haj-Fraj, A. / Pfeiffer, F. | British Library Online Contents | 2000


    Active engine control for gearshifting in automated manual transmissions

    Fredriksson,J. / Egardt,B. / Chalmers Univ.of Technology,SE | Automotive engineering | 2003




    Scania CAG - Computer Aided Gearshifting

    Holmelius,H. / Saab-Scania,SE | Automotive engineering | 1986