A vehicle includes an engine, dual-clutch transmission (DCT), and controller. The controller executes a method to detect a requested power-on downshift of the DCT from an attained gear to a desired gear. Offgoing and oncoming clutches are identified for the power-on downshift from the input clutches, and the controller determines whether engine speed has reached a target synchronous speed. The controller increases oncoming clutch torque at a calibrated ramp rate when a fork for the desired gear has engaged and releases the offgoing clutch at another calibrated ramp rate. If engine flare is present, the controller adjusts the oncoming clutch ramp rate, uses engine torque management to control the flare, and allows the offgoing clutch to continue disengaging. The power-on downshift is completed when the oncoming clutch reaches full torque capacity of the engine and the offgoing clutch is completely exhausted.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Power-on downshift control of a dual-clutch transmission


    Beteiligte:
    NOWAK MATEUSZ (Autor:in) / WHITTON MATTHEW D (Autor:in)

    Erscheinungsdatum :

    26.01.2016


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F16H Getriebe , GEARING




    Sub-idle downshift control of transmission

    JOUSMA JASON | Europäisches Patentamt | 2016

    Freier Zugriff

    Transmission coasting downshift change intention control method

    LIN YUANZONG / YIN LIANZUO / ZHU GAOHUA et al. | Europäisches Patentamt | 2022

    Freier Zugriff

    METHOD TO CONTROL EXECUTION OF DOWNSHIFT WHILE RELEASING ACCELERATOR PEDAL IN DRIVE TRAIN PROVIDED WITH DUAL-CLUTCH SERVO-ASSISTED TRANSMISSION

    ALESSANDRO BARONE / ANDREA NANNINI / GIACOMO SENSERINI et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    Coasting downshift control device for automatic transmission

    KAWAMOTO YOSHINOBU / TAKENAKA HIROYUKI / ENDO GO | Europäisches Patentamt | 2016

    Freier Zugriff