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Control of vehicle driving force

  • US 6,269,296 B1
  • Filed: 07/14/1999
  • Issued: 07/31/2001
  • Est. Priority Date: 07/15/1998
  • Status: Expired due to Term
First Claim
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1. An apparatus for controlling a vehicle driving force comprising:

  • an input section for sensing a driver'"'"'s accelerator input quantity and a vehicle speed of a vehicle;

    an output section for varying an actual vehicle driving force; and

    a control section connected with said input section to receive input information therefrom, to determine, as a normal target driving force, a desired vehicle driving force on a level road in accordance with the accelerator input quantity and the vehicle speed, further to determine a vehicle grade resistance, to calculate a modification parameter in accordance with the vehicle grade resistance, and to determine a grade-adapted target driving force in accordance with the normal driving force and the modification parameter, the controller being further connected with said output section to achieve the grade-adapted target driving force with the output section;

    wherein the input section comprises an accelerator input quantity sensing section for sensing the accelerator input quantity, and a vehicle speed sensing section for sensing the vehicle speed; and

    wherein the control section comprises a normal driving force determining section for determining, as the normal driving force, the desired vehicle driving force on the level road in accordance with the accelerator input quantity and the vehicle speed, a vehicle weight grade resistance determining section for determining the vehicle grade resistance, a modification parameter calculating section for calculating the modification parameter in accordance with the grade resistance, and a grade-adapted target driving force calculating section for determining the grade-adapted target driving force in accordance with the normal driving force and the modification parameter;

    wherein the modification parameter calculating section comprises a modification quantity calculating section for calculating a driving force modification quantity which is set at a predetermined percent of the grade resistance, the predetermined percent being smaller than 100%; and

    wherein the grade-adapted target driving force calculating section determines the grade-adapted target driving force by adding the driving force modification quantity to the normal driving force.

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