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Method for controlling an automatic gearbox according to a road profile

  • US 7,003,387 B2
  • Filed: 07/04/2002
  • Issued: 02/21/2006
  • Est. Priority Date: 07/06/2001
  • Status: Expired due to Term
First Claim
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1. A method of controlling a road vehicle automatic transmission by computer utilizing the information regarding speed of travel and transverse acceleration of the vehicle and engine load, so as to apply various road profile dependent shift laws to the transmission, wherein the computer of the transmission applies various shift laws for the ratios according to the value of an activity coefficient Kcorner dependent on the speed of travel of the vehicle (V), on the lateral acceleration of the vehicle (Gt) and on its derivative with respect to time (dGt/dt), and wherein the computer applies various discrete change of ratio laws.

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