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METHOD FOR THE CONTROL OF AN AUTOMATIC TRANSMISSION OF A MOTOR VEHICLE, CONTROL DEVICE FOR AN AUTOMATIC TRANSMISSION OF A MOTOR VEHICLE AND MOTOR VEHICLE

  • US 20110190992A1
  • Filed: 02/03/2011
  • Published: 08/04/2011
  • Est. Priority Date: 02/03/2010
  • Status: Abandoned Application
First Claim
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1. A method for control of an automatic transmission of a motor vehicle at least during downhill driving of the motor vehicle in a coasting mode, comprising:

  • setting a desired speed vset of the motor vehicle for a cruise control system of the motor vehicle;

    determining a nominal acceleration aset of the motor vehicle and a current acceleration aactual of the motor vehicle;

    comparing the nominal acceleration aset with the current acceleration aactual;

    activating a downhill driving mode of a control device of the automatic transmission if aactual is ≧

    (aset

    a), where Δ

    a is a predetermined value and Δ

    a>

    0;

    determining a first position of an accelerator pedal of the motor vehicle, the first position indicative of a possible actuation of the accelerator pedal;

    determining a first current speed vactual-1 of the motor vehicle;

    comparing the first current speed vactual-1 with the desired speed vset; and

    downshifting from a currently engaged gear of the automatic transmission into a next lower gear if vactual-1 is ≧

    (vset

    v), where Δ

    v is a predetermined value and Δ

    v is >

    0, and if the first position of the accelerator pedal identifies a non-existent actuation of the accelerator pedal.

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