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Inline electromechanical variable transmission system

  • US 10,421,350 B2
  • Filed: 10/20/2015
  • Issued: 09/24/2019
  • Est. Priority Date: 10/20/2015
  • Status: Expired due to Fees
First Claim
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1. A drive system for a vehicle, comprising:

  • a first gear set including a first sun gear, a first ring gear, a first plurality of planetary gears coupling the first sun gear to the first ring gear, and a first carrier rotationally supporting the first plurality of planetary gears;

    a second gear set including a second sun gear, a second ring gear, a second plurality of planetary gears coupling the second sun gear to the second ring gear, and a second carrier rotationally supporting the second plurality of planetary gears, wherein the first carrier is selectively coupled to the second carrier;

    a connecting shaft coupling an engine to the first gear set;

    a first electrical machine coupled to the first gear set;

    a second electrical machine coupled to the second gear set;

    an output shaft configured to transport power from the first electrical machine, the second electrical machine, and the engine to a tractive element of the vehicle;

    a first clutch selectively rotationally coupling the first carrier to the output shaft when engaged; and

    a second clutch selectively rotationally coupling the first carrier to the output shaft when engaged;

    wherein the output shaft is aligned with the connecting shaft, the first electrical machine, and the second electrical machine to thereby form a straight-thru transmission arrangement, wherein the first clutch is configured to be engaged when the drive system is selectively reconfigured into a forward mode of operation, and wherein the second clutch is configured to be engaged when the drive system is selectively reconfigured into a reverse mode of operation.

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