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Hybrid powertrain with an engine input clutch and method of control

  • US 7,998,023 B2
  • Filed: 10/13/2010
  • Issued: 08/16/2011
  • Est. Priority Date: 05/11/2007
  • Status: Expired due to Fees
First Claim
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1. A hybrid vehicle powertrain comprising:

  • an engine;

    a transmission having;

    an input member operatively connectable to said engine;

    an output member for delivering power from said transmission for vehicle propulsion;

    a motor operatively connectable to said input member and to said output member and capable of supplying torque to said output member for vehicle propulsion;

    an energy storage device capable of supplying power to and receiving power from said motor;

    a first input clutch that selectively transmits torque by mechanical friction and is selectively engageable to connect said engine with said input member;

    a second input clutch that is selectively engageable to connect said engine with said input member;

    wherein said first input clutch and said second input clutch are configured to be engageable in parallel between said engine and said input member;

    wherein said first input clutch connects said engine with said input member when said first input clutch is engaged regardless of whether said second input clutch is engaged;

    wherein selective engagement of said first input clutch permits said motor to power said engine to start said engine; and

    wherein selective engagement of said second input clutch permits said engine to power said transmission for propulsion.

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