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Working machine and a method for operating a working machine

  • US 10,639,982 B2
  • Filed: 07/08/2014
  • Issued: 05/05/2020
  • Est. Priority Date: 05/07/2009
  • Status: Active Grant
First Claim
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1. A working machine comprisinga prime mover for supplying torque to driving wheels of the working machine, anda transmission line arranged between the prime mover and the driving wheels for transmitting torque from the prime mover to the driving wheels, the transmission line comprising a gearbox arranged between the prime mover and the wheels,at least one hydraulic machine in a hydraulic system for moving an implement arranged on the working machine and/or steering the working machine, andan electric machine for driving or braking the driving wheels and/or for driving or braking the at least one hydraulic machine, the electric machine being arranged in parallel with the prime mover with respect to the transmission line such that torque can be provided to the wheels by either one or both of the prime mover and the electric machine, and being mechanically connected to the transmission line between the prime mover and the gearbox,wherein the transmission line comprises a transmission component for engagement and disengagement of the prime mover relative to the driving wheels, the transmission component being arranged between the prime mover and the electric machine, the hydraulic machine is mechanically connected to the transmission line between the prime mover and the gearbox, and the gearbox is a continuously variable transmission having a variator unit, and the gearbox has an operation mode where the rotation speed of an output shaft of the gearbox is zero or close to zero independently of the rotation speed of an input shaft of the gearbox at the same time as torque can be transmitted from the input shaft to the output shaft.

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