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    TRANSMISSION STRUCTURE
    1.
    发明公开
    TRANSMISSION STRUCTURE 审中-公开

    公开(公告)号：EP4443020A1

    公开(公告)日：2024-10-09

    申请号：EP24161287.8

    申请日：2024-03-04

    申请人： KANZAKI KOKYUKOKI MFG. CO., LTD.

    发明人： TAKAHASHI, Takumi ,  OGURA, Kohei ,  ITO, Fumiaki ,  INOUE, Tasuku

    IPC分类号： F16H47/04 ,  F16H61/431 ,  F16H61/462 ,  F16H61/472

    CPC分类号： F16H61/431 ,  F16H47/04 ,  F16H2037/088620130101 ,  F16H61/462 ,  F16H61/47 ,  F16H59/44 ,  F16H2059/687620130101 ,  F16H61/472

    摘要： [Problem] The problem is in providing a transmission structure which includes low gear and high gear transmission mechanisms and an HST and can improve the vehicle speed responsiveness at the time of switching between a low gear transmission state and a high gear transmission state.
    [Solution] At the time of switching between low gear and high gear transmission states, the present invention creates an idling state in which the power transmission state from a drive source to a drive wheel is cut off, and calculates an excess vehicle speed HST gear ratio by adding an excess correction value, which is for changing the vehicle speed at the switching completion point in time in excess of the actual vehicle speed by a predetermined speed, to an actual vehicle speed ratio, which represents an HST gear ratio that causes the vehicle speed at the switching completion point in time to match the actual vehicle speed attained immediately before the completion of the switching, so as to operate an HST actuator using the excess vehicle speed HST gear ratio as a control target value during the idling state.

    METHOD FOR CALIBRATING A COUPLING SYSTEM OF A MECHANICAL TRANSMISSION
    2.
    发明公开
    METHOD FOR CALIBRATING A COUPLING SYSTEM OF A MECHANICAL TRANSMISSION 审中-公开

    公开(公告)号：EP4428401A1

    公开(公告)日：2024-09-11

    申请号：EP23161108.8

    申请日：2023-03-10

    申请人： Robert Bosch GmbH

    发明人： Barrera Villalpando, Abraham ,  Manstetten, Rüdiger ,  Werner, Franz

    IPC分类号： F16H61/431 ,  F16H61/444

    CPC分类号： F16H61/444 ,  F16H61/431 ,  F16H61/421 ,  F16H59/38 ,  F16H59/40 ,  F16H59/44 ,  F16H47/02

    摘要： The present invention relates to a method for controlling a hydrostatic travel drive (1) of a mobile working machine, wherein the hydrostatic travel drive is provided with a first hydraulic machine (4) with adjustable displacement volume and with a second hydraulic machine (6) and a third hydraulic machine (8), wherein the first hydraulic machine can be coupled or is coupled to a drive machine (20), wherein the pressure medium coming from the first hydraulic machine can be conveyed to the second and to the third hydraulic machine (6, 8), which are arranged parallel to each other, the second hydraulic machine (6) being rotatably connectable by means of a clutch (38) to at least one wheel or chain or axle to be driven, the third hydraulic machine (8) being rotatably connected to the at least one wheel or chain or axle, wherein the displacement volume of said first hydraulic machine (4) can be regulated based on a control pressure,
    characterized in that the method comprises the following steps:
    a. Receiving a driving demand for the mobile working machine;
    b. Providing a request for the opening of the clutch so that the second hydraulic machine (6) will not be anymore rotationally connected to the at least one wheel or chain or axle;
    c. Reducing the displacement volume of said first hydraulic machine (4) by reducing said control pressure to an unload level which is dependent on the driving demand;
    d. Opening said clutch;
    e. Increasing the displacement of said first hydraulic machine (4) by increasing said control pressure to a load level which is dependent on said driving demand.

    VERFAHREN ZUR REGELUNG EINES HYDRAULISCHEN ANTRIEBS EINES FAHRZEUGS, STEUEREINHEIT, COMPUTERPROGRAMM UND MASCHINENLESBARES SPEICHERMEDIUM
    6.
    发明公开
    VERFAHREN ZUR REGELUNG EINES HYDRAULISCHEN ANTRIEBS EINES FAHRZEUGS, STEUEREINHEIT, COMPUTERPROGRAMM UND MASCHINENLESBARES SPEICHERMEDIUM 审中-公开

    公开(公告)号：EP4174344A1

    公开(公告)日：2023-05-03

    申请号：EP22204441.4

    申请日：2022-10-28

    申请人： Robert Bosch GmbH

    发明人： Lenzgeiger, Ulrich ,  Voelk, Peter ,  Bender, Frank ,  Passenberg, Carolina ,  Spang, Joerg

    IPC分类号： F16H61/4008 ,  F16H61/421 ,  F16H61/431 ,  F16H61/47

    摘要： Die Offenbarung betrifft ein Verfahren zur Regelung eines hydraulischen Antriebs (1) eines Fahrzeugs, welcher wenigstens eine Hydromaschine (4; 6) mit einem verstellbaren Verdrängungsvolumen hat. Das Verfahren weist folgende Schritte auf: Erfassen einer Ist-Geschwindigkeit (v ist ) des Fahrzeugs und einer Soll-Geschwindigkeit (v soll ) des Fahrzeugs; Regeln eines Soll-Verdrängungsvolumens oder eines mechanischen Soll-Äquivalents (α soll ) in Abhängigkeit der Ist-Geschwindigkeit (v ist ) des Fahrzeugs und der Soll-Geschwindigkeit (v soll ) des Fahrzeugs; Kategorisieren des Soll-Verdrängungsvolumens oder des mechanischen Soll-Äquivalents (α soll ) anhand eines Grenzwerts; und wahlweise bei einer Kategorisierung des Soll-Verdrängungsvolumens in eine erste Kategorie, Regeln einer Betriebsgröße des hydraulischen Antriebs (1) in Abhängigkeit eines Ist-Werts der Betriebsgröße (p ist ) und des Grenzwerts; oder bei einer Kategorisierung des Soll-Verdrängungsvolumens in eine von der ersten Kategorie unterschiedliche zweite Kategorie, Regeln der Betriebsgröße in Abhängigkeit des Ist-Werts der Betriebsgröße (p ist ) und entweder des Soll-Verdrängungsvolumens oder des mechanischen Soll-Äquivalents (α soll ). Die Offenbarung betrifft des Weiteren eine entsprechende Steuereinheit (8), ein entsprechendes Computerprogramm und ein entsprechendes maschinenlesbares Speichermedium.

    SYSTEM FOR CONTROLLING A PROPULSION SYSTEM OF A WORK OR AGRICULTURAL VEHICLE
    9.
    发明公开
    SYSTEM FOR CONTROLLING A PROPULSION SYSTEM OF A WORK OR AGRICULTURAL VEHICLE 审中-公开

    公开(公告)号：EP3933121A1

    公开(公告)日：2022-01-05

    申请号：EP21183330.6

    申请日：2021-07-02

    申请人： CNH Industrial Italia S.p.A.

    发明人： GARRAMONE, Adriano ,  GRAVILI, Andrea ,  LIBERTI, Stefano ,  VENEZIA, Antonio

    IPC分类号： E02F9/22 ,  F16H61/47 ,  F16H61/465 ,  B60W30/188 ,  F16H61/431 ,  F16H61/421

    摘要： A method of controlling a propulsion system of a work or agricultural vehicle, with hydraulic transmission adapted to work according to a first operating mode (ST1) in which an inclination of an accelerator lever proportionally determines a rotation speed of the prime mover and a second operating mode (ST2) in which said lever inclination indicates a vehicle speed, while the prime mover is operated at a predetermined approximately fixed operating point, the method, in said first operating mode, comprising a first step (Step 1) of verification that a vehicle speed is approximately constant for a predetermined time interval, then when the verification is positive (yes), a second step (Step 2) in which the propulsion system is automatically controlled to reduce the rotation speed of the prime mover moving to said predetermined operating point and to adapt the hydraulic transmission so as to maintain the vehicle speed was unchanged during the reduction of the rotation speed of the prime mover.