A control system and method for a hybrid electric vehicle powertrain supplies battery power boost torque to vehicle traction wheels to modify shift points for a multiple ratio transmission in the powertrain. A shift schedule is adjusted to avoid a downshift for small changes in torque demand, thus reducing shift frequency due to small transient changes in torque demand.


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    Title :

    Multiple-ratio transmission downshift strategy for hybrid electric vehicle powertrains


    Contributors:

    Publication date :

    2016-03-29


    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 / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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