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Torque control for hybrid electric vehicle speed control operation

  • US 8,596,390 B2
  • Filed: 12/05/2007
  • Issued: 12/03/2013
  • Est. Priority Date: 12/05/2007
  • Status: Active Grant
First Claim
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1. A method of controlling a hybrid propulsion system for a vehicle including a first electric energy conversion device for exchanging torque through a transmission device, the transmission device exchanging torque with a first at least one drive wheel, the hybrid propulsion system having a second electric energy conversion device for exchanging torque with a second at least one drive wheel, operation of the first electric energy conversion device, the transmission device, and the second electric energy conversion device controlled by a control system, the method comprising:

  • during a vehicle cruise control operation of the vehicle to maintain vehicle speed of the vehicle at a desired speed, in response to vehicle acceleration of the vehicle resulting in vehicle speed of the vehicle beyond the desired speed, the vehicle acceleration of the vehicle not caused by vehicle operator input of the vehicle, varying torque output of at least one of the first electric energy conversion device and the second electric energy conversion device to provide brake torque to at least one of the first at least one drive wheel and the second at least one drive wheel to decelerate the vehicle to the desired speed, where selection of said one of the first and second electric energy conversion device is based on an operating condition of the vehicle.

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