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Method for controlling a hybrid driveline in order to optimize torque from a combustion engine arranged at the driveline

  • US 9,956,952 B2
  • Filed: 03/17/2015
  • Issued: 05/01/2018
  • Est. Priority Date: 03/20/2014
  • Status: Active Grant
First Claim
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1. A method to control a hybrid powertrain to optimize the torque from a combustion engine, arranged in the hybrid powertrain, wherein the hybrid powertrain also comprises;

  • a gearbox with an input shaft and an output shaft;

    a first planetary gear, connected to the input shaft and a first main shaft;

    a second planetary gear, connected to the first planetary gear and a second main shaft;

    a first electrical machine, connected to the first planetary gear;

    a second electrical machine, connected to the second planetary gear;

    at least one gear pair connected with the first planetary gear and the output shaft; and

    at least one gear pair connected with the second planetary gear and the output shaft, wherein the combustion engine is connected with a first planetary wheel carrier, arranged in the first planetary gear via the input shaft of the gearbox, and wherein the second main shaft is connected with a planetary wheel carrier, arranged in the second planetary gear, said method comprising the steps;

    a) if connected, disconnecting the moveable parts of the first planetary gear from each other and the moveable parts of the second planetary gear from each other;

    b) to control the combustion engine to a predetermined engine speed (nice); and

    c) to control the first and the second electrical machines in such a way that a desired torque (TDrv) is achieved in the output shaft, while simultaneously a requested total power consumption (PEM) of the first and the second electrical machines is achieved.

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