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Method for controlling a hybrid driveline for reducing electrical losses

  • US 10,077,044 B2
  • Filed: 03/17/2015
  • Issued: 09/18/2018
  • Est. Priority Date: 03/20/2014
  • Status: Active Grant
First Claim
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1. A method to control a hybrid powertrain, comprising a combustion engine;

  • a gearbox with an input shaft and an output shaft, which combustion engine is connected to the input shaft;

    a first planetary gear, which is connected to the input shaft;

    a second planetary gear, connected to the first planetary gear;

    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 same method comprising the steps;

    a) engaging a gear corresponding to the at least one gear pair, which is connected with the first planetary gear, in the gearbox or corresponding to the at least one gear pair, connected with the second planetary gear and the output shaft;

    b) selecting a gear by connecting two rotatable components in the first planetary gear with each other, with the use of a first coupling device;

    or by connecting two rotatable components in the second planetary gear with each other, with the use of a second coupling device; and

    c) controlling a switch, connected to the first and the second electrical machines, in such a way that the first electrical machine is set into a waiting state, if the second coupling device connects the two rotatable components of the second planetary gear with each other, and in such a way that the second electrical machine is set into a waiting state, if the first coupling device connects the two rotatable components of the first planetary gear with each other.

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