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Hybrid electric vehicle powertrain with regenerative braking

  • US 20050151420A1
  • Filed: 02/03/2005
  • Published: 07/14/2005
  • Est. Priority Date: 05/07/2001
  • Status: Abandoned Application
First Claim
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1. A method for braking a vehicle powertrain having a first driving axle exclusively driven electrically, the first driving axle exclusively having only electric regenerative brakes, the vehicle having also a second driving axle driven by an internal combustion engine, the second driving axle exclusively having only friction brakes;

  • the method comprising;

    monitoring a headroom of regenerative braking available and dissipating power through a thermal resistor to make more headroom available for regenerative braking;

    electrically braking the first driving axle regeneratively up to a first level;

    frictionally braking the second driving axle when a braking requirement of the vehicle is greater than the first level; and

    additionally compression braking the second driving axle with the internal combustion engine up to the first level and above the first level of braking the vehicle.

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