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Vehicle speed control device and method

  • US 20090048755A1
  • Filed: 07/09/2008
  • Published: 02/19/2009
  • Est. Priority Date: 07/11/2007
  • Status: Active Grant
First Claim
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1. A vehicle speed control device comprising:

  • drive force calculating means for calculating a control drive force for maintaining a speed of a vehicle to a set speed; and

    cruise control means for conducting a cruise control which makes the vehicle travel by the control drive force calculated by the drive force calculating means,wherein the drive force calculating means calculates a drive force including a feedforward component corresponding to the set speed and a travel resistance against travel of the vehicle, and a feedback component corresponding to a deviation between the set speed and an actual speed of the vehicle as the control drive force, andwherein the cruise control means interrupts the cruise control when accelerator operation is conducted by a driver during the cruise control, and a requested drive force requested by the accelerator operation exceeds the control drive force, and restarts the cruise control at a time when the requested drive force becomes lower than the control drive force.

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