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Two-mode, compound-split electro-mechanical vehicular transmission

  • US 5,931,757 A
  • Filed: 06/24/1998
  • Issued: 08/03/1999
  • Est. Priority Date: 06/24/1998
  • Status: Expired due to Term
First Claim
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1. A two-mode compound split hybrid electro-mechanical transmission, comprising:

  • an input member for receiving power from a prime mover power source;

    an output member for delivering power from the transmission;

    first and second motor/generators;

    energy storage means for interchanging electrical power between said storage means and said first and second motor/generators;

    control means for regulating the electrical power interchange between said energy storage means and said first and second motor/generators and also for regulating electrical power interchange between said first and second motor/generators;

    three coaxially aligned planetary gear arrangements;

    each planetary gear arrangement utilizing first and second gear members;

    said first and second gear members of each planetary gear arrangement meshingly engaging a plurality of planet gears mounted on a carrier incorporated in each corresponding planetary gear arrangement;

    said first and second motor/generators being coaxially aligned with each other and with said three planetary gear arrangements;

    at least one of said gear members in said first or second planetary gear arrangement connected to said first motor/generator;

    at least one of said gear members in said first or second planetary gear arrangement connected to said second motor/generator;

    means operatively to connect said carriers associated with said first, second and third planetary gear arrangements to each other and to said output member;

    one of the gear members of said first or second planetary gear arrangements not connected to said first motor/generator being continuously connected to one of said gear members in said third planetary gear arrangement;

    the other gear member of said first or second planetary gear arrangement not connected to said first motor/generator being operatively connected to said input member; and

    that said gear member of said third planetary gear arrangement not connected together said first or second planetary gear arrangement being selectively connected to ground.

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