×

Hybrid Powertrain with Efficient Electric-Only Mode

  • US 20090036246A1
  • Filed: 08/01/2007
  • Published: 02/05/2009
  • Est. Priority Date: 08/01/2007
  • Status: Active Grant
First Claim
Patent Images

1. A hybrid electromechanical transmission connectable with a power source, comprising:

  • an input member connected with the power source;

    an output member;

    a planetary gear set having a first, a second, and a third member;

    first and second motor/generators;

    a battery operatively connected to the motor/generators for receiving power therefrom and delivering power thereto;

    wherein the input member is operatively connected with the first member;

    wherein the first motor/generator is operatively connected for rotation with the second member;

    wherein the second motor/generator is operatively connected for rotation with the output member;

    a first torque-transmitting mechanism engagable to connect the second motor/generator for rotation with the third member; and

    wherein the battery and second motor/generator provide an electric-only operating mode to power the output member when the first torque-transmitting mechanism is not engaged;

    the power source, planetary gear set and first motor/generator thereby being disconnected from the output member during the electric-only operating mode to prevent parasitic drag.

View all claims
  • 12 Assignments
Timeline View
Assignment View
    ×
    ×