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METHOD AND APPARATUS FOR BRAKING A HYBRID ELECTIC VEHICLE

  • US 20030184156A1
  • Filed: 12/11/2002
  • Published: 10/02/2003
  • Est. Priority Date: 03/26/2002
  • Status: Active Grant
First Claim
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1. A method for braking a hybrid electric vehicle having an internal combustion engine and a traction motor coupled to a common output shaft, with the vehicle further having an electric energy storage device connected to the traction motor, with said braking method comprising the steps of:

  • monitoring operation of the vehicle to determine if the vehicle'"'"'s driver is operating the vehicle in a braking mode; and

    in the event that the vehicle is being braked, controlling the engine and the traction motor so as to provide dynamic braking such that when the traction motor is operated regeneratively, the brake torque produced by the engine is reduced from a maximum contemporaneous brake torque value.

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