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Integrated hybrid transmission with mechanical accessory drive

  • US 5,558,173 A
  • Filed: 09/23/1993
  • Issued: 09/24/1996
  • Est. Priority Date: 09/23/1993
  • Status: Expired due to Term
First Claim
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1. A power train for a vehicle, said power train comprising:

  • an internal combustion engine to provide a source of torque;

    a motor/generator to provide a second source of torque;

    a drive ratio selection transmission;

    a power transmission;

    said power transmission having compounded first and second planetary gear sets;

    each planetary gear set having first gear means, second gear means and a plurality of planetary gears mounted on a carrier operatively to connect said first and second gear means of the respective first and second planetary gear sets;

    a common gear member serving not only as said second gear means for said first planetary gear set but also as said first gear means for said second planetary gear set;

    said internal combustion engine adapted selectively to provide torque to said power transmission through said carrier for said second planetary gear set;

    means selectively to transfer torque between said motor/generator and said power transmission through said carrier for said second planetary gear set;

    means selectively to transfer torque to and from the drive ratio selection transmission and said internal combustion engine, said means also transferring torque from said internal combustion engine to said power transmission;

    said carrier for said first planetary gear set being selectively connected to ground;

    means selectively connecting said drive ratio selection transmission to ground;

    an accessory drive; and

    ,said accessory drive being operatively connected to said motor/generator and said power transmission.

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