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Method for controlling an automatic gearbox of a motor vehicle in the vent that the gas/pedal is spontaneously released

  • US 20040098181A1
  • Filed: 04/22/2003
  • Published: 05/20/2004
  • Est. Priority Date: 11/11/2000
  • Status: Active Grant
First Claim
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1. Method for control of an automatic transmission of a motor vehicle in the event of a spontaneous gas/pedal release (FastOff);

  • wherein the automatic transmission is driven by an internal combustion engine that can be influenced with an accelerator pedal and signal proportional to the pedal position is fed to an electronic transmission control where has been stored a shifting characteristic field; and

    wherein the spontaneous gas/pedal release (FastOff) is detected and an upshift block (FFO=1) is activated when a pedal position gradient (PSTG) is smaller than a pedal gradient threshold (KF_PSTG), characterized in that the mode of the upshift block (FFO=1) is lifted upon detection of a traction operation when an actual engine torque (MMM) exceeds a push-pull characteristic line (KL_ZS) stored as function of a value equivalent to an engine rotational speed (NMO) depending on a vehicle acceleration/deceleration (AIST) dependent on the overall tractional resistance (GFW) and pedal gradient thresholds (KW_PSTGPOS, KW_PSTGNEG).

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