A control system for a vehicular automatic transmission system is configured to determine a target gear ratio 306 based on speed parameter 302 and accelerator input 304 signals and, if a shift inhibit condition is satisfied 308, inhibit 338 the initiation of a shift to the target gear ratio for an initial period of time 340. After the initial time period has elapsed, initiation of a shift to the target gear ratio is inhibited 344 until it is determined that the shift will not complete during lash crossing 346. Signals indicative of a powertrain torque (348,fig.15), current gear ratio (324,fig.15) and accelerator input may be used to determine whether the shift will complete during lash crossing 346. If the system determines that the shift will not complete during lash crossing, the inhibit is removed 342. Instructions for executing the method of control may be stored on a computer readable storage medium.


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    Title :

    Controlling gear shifts


    Contributors:
    TOM OWEN (author) / SAM JOHNSON (author) / ROBERT CREAN (author) / JAMES MANNION (author) / JAMES CANNON (author)

    Publication date :

    2024-11-20


    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 / F16H Getriebe , GEARING



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