A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated fiction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a torque source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a torque source is modulated. A perceptible transmission output torque reduction during an upshift is avoided. Measured torque values are used during a torque phase of the upshift to correct an estimated oncoming friction element target torque so that transient torque disturbances at an oncoming clutch are avoided and torque transients at the output shaft are reduced.


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    Title :

    CLUTCH TORQUE TRAJECTORY CORRECTION TO PROVIDE TORQUE HOLE FILLING DURING A RATIO UPSHIFT



    Publication date :

    2019-03-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    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 / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / F16H Getriebe , GEARING



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    Clutch torque trajectory correction to provide torque hole filling during a ratio upshift

    TESLAK CHRISTOPHER JOHN / PIETRON GREGORY MICHAEL / TSENG HONGTEI ERIC et al. | European Patent Office | 2015

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    Clutch torque trajectory correction to provide torque hole filling during a ratio upshift

    TESLAK CHRISTOPHER JOHN / PIETRON GREGORY MICHAEL / TSENG HONGTEI ERIC et al. | European Patent Office | 2016

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    Clutch Torque Trajectory Correction to Provide Torque Hole Filling during a Ratio Upshift

    TESLAK CHRISTOPHER JOHN / PIETRON GREGORY MICHAEL / TSENG HONGTEI ERIC et al. | European Patent Office | 2016

    Free access

    Clutch torque trajectory correction to provide torque hole filling during a ratio upshift

    TESLAK CHRISTOPHER JOHN / PIETRON GREGORY MICHAEL / TSENG HONGTEI ERIC et al. | European Patent Office | 2019

    Free access