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Vehicle gradient estimating device and vehicle traveling control device

  • US 8,352,119 B2
  • Filed: 04/16/2010
  • Issued: 01/08/2013
  • Est. Priority Date: 04/21/2009
  • Status: Expired due to Fees
First Claim
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1. A vehicle gradient estimating device comprising:

  • a vehicle speed sensor which detects a traveling speed of a subject vehicle;

    an acceleration calculating unit which calculates an acceleration of the subject vehicle on the basis of the traveling speed;

    an engine load deceleration calculating unit which calculates a deceleration due to an engine load of the subject vehicle;

    an acceleration correcting unit which corrects the acceleration by using the deceleration;

    a brake fluid pressure detecting unit which detects a brake fluid pressure of the subject vehicle; and

    a first gradient estimating unit which estimates a gradient of a road being travelled of the subject vehicle,wherein the first gradient estimating unit estimates the gradient on the basis of a ratio between the brake fluid pressure and the acceleration corrected by the acceleration correcting unit.

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