A computer system (100) (e.g., an on-board vehicle computer system) creates or updates a mapping of transmission gears and respective driveline ratios during operation of the vehicle. The system obtains (210, 220) a current engine speed and vehicle speed and calculates (230) a current driveline ratio for the vehicle based on the current engine speed and vehicle speed. If (240) the driveline is engaged, the system updates (250) the mapping based at least in part on the current driveline ratio. Performing the update may include adding (350) a new transmission gear or updating (340) an existing transmission gear in the mapping, or removing (360) a duplicate transmission gear from the mapping. Applications include cruise control, predictive cruise control, predictive shifting, and selecting a gear for a specific purpose (e.g., for descending a hill).


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    Title :

    REAL-TIME TRACKING OF ESTIMATED DRIVELINE RATIOS


    Additional title:

    ECHTZEITVERFOLGUNG VON GESCHÄTZTEN ANTRIEBSSTRANGS-ÜBERSETZUNGSVERHÄLTNISSEN
    SUIVI EN TEMPS RÉEL DE RAPPORTS DE DÉMULTIPLICATION ESTIMÉS DE CHAÎNE CINÉMATIQUE


    Contributors:

    Publication date :

    2019-06-26


    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



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