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Method for takeoff of a vehicle with a hybrid driveline

  • US 10,315,642 B2
  • Filed: 03/17/2015
  • Issued: 06/11/2019
  • Est. Priority Date: 03/20/2014
  • Status: Active Grant
First Claim
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1. A method for moving off of a vehicle with 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 of the gearbox;

    a first planetary gear comprising a first set of rotatable components, wherein the first planetary gear is connected to the input shaft of the gearbox and to a first main shaft;

    a second planetary gear comprising a second set of rotatable components, wherein the second planetary gear is connected to the first planetary gear and to a second main shaft;

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

    a second electrical machine connected to the second planetary gear;

    at least one first gear pair arranged to connect the first main shaft and the output shaft of the gearbox; and

    at least one second gear pair arranged to connect the second main shaft and the output shaft of the gearbox, wherein the combustion engine, via the input shaft of the gearbox, is directly connected with a first planetary wheel carrier comprised in the first set of rotatable components of the first planetary gear, and wherein the second main shaft is connected with a second planetary wheel carrier comprised in the second set of rotatable components of the second planetary gear, wherein said method comprises;

    a) ensuring that the first set of rotatable components of the first planetary gear are disconnected from each other, and ensuring that the second set of rotatable components of the second planetary gear are disconnected from each other;

    b) ensuring that gears of the at least one first gear pair are engaged with each other to thereby connect the first main shaft and the output shaft of the gearbox, and that gears of the at least one second gear pair are engaged with each other to thereby connect the second main shaft and the output shaft of the gearbox; and

    c) activating the first electrical machine and the second electrical machine, in such a way that a torque is applied to the output shaft of the gearbox.

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