A hybrid powertrain includes an engine having a crankshaft, and an electric motor having a rotor selectively coupled to the crankshaft via a disconnect clutch and configured to operate in torque control and in speed control. The powertrain further includes a transmission having a torque converter with an impeller fixed to the rotor, a turbine disposed on an input shaft of the transmission, and a bypass clutch configured to selectively transmit torque from the impeller to the turbine. A controller is configured to, in response to the motor switching from torque control to speed control, generate a torque command for the motor that defines a magnitude derived from an error between measured and estimated speeds of the impeller obtained during torque control to prevent a spike in motor speed when the motor switches from torque control to speed control.


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    Title :

    SPEED CONTROLLING AN ELECTRIC MACHINE OF A HYBRID ELECTRIC VEHICLE


    Contributors:
    MEYER JASON (author) / JOHRI RAJIT (author)

    Publication date :

    2018-02-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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