In this work, a power-split continuously variable transmission (CVT) used in high-power tractors is considered. Power-split CVTs are characterized by the combination of a traditional discontinuous mechanical transmission and a continuously variable transmission. This provides, at the same time, smooth variations of the transmission ratio and high efficiency of the overall transmission system. The CVT considered in this paper is a hydrostatic power-split unit conceived for top-power agricultural tractors. The goal of this paper is to present a case study on the design and tuning of the control system structure for this type of CVT. This structure consists of three main parts: a servo controller on the internal current of the valve of the hydraulic transmission; a servo controller on the hydraulic transmission ratio; a synchronizer which coordinates the hydraulic and the mechanical parts of the CVT. The design, tuning and testing of this set of automatic controllers is presented.


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    Titel :

    On the design and tuning of the controllers in a power-split continuously variable transmission for agricultural tractors


    Beteiligte:
    Savaresi, S.M. (Autor:in) / Taroni, F. (Autor:in) / Prevedi, F. (Autor:in) / Bittani, S. (Autor:in)


    Erscheinungsdatum :

    2003


    Format / Umfang :

    15 Seiten, 27 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch