A method for controlling an automatic transmission of a motor vehicle, a control device for an automatic transmission of a motor vehicle, and motor vehicle

摘要

An embodiment of the invention relates to a method for controlling an automatic transmission (1) of a motor vehicle (2) at least during a downhill drive of the motor vehicle (2) in the coasting operation, said method comprising the steps of. There is a setting a desired speed v.sub.des_should of the motor vehicle (2) for a speed control system (3) of the motor vehicle (2), a determining a nominal acceleration a_should of the motor vehicle (2) and an instantaneous acceleration a_is of the motor vehicle (2) and a comparison of the nominal acceleration a_should with the instantaneous acceleration a_is. Furthermore, an activation of a downhill drive - mode of a control device (4) of the automatic transmission (1), if a_is ≥ (a_should + Δa) and a determining a first position of an accelerator pedal (5) of the motor vehicle (2). In addition, a determining a first instantaneous speed v_{, 1} of the motor vehicle (2) and a comparison of the first current speed v_{, 1} with the desired speed v.sub.des_should. In addition, an automatic downshifting of the instantaneously engaged gear of the automatic transmission (1) in the next smaller gear, if v_{, 1} ≥ (v_should + Δv) and, if the determined first position of the accelerator pedal (5) a non-present actuation of the accelerator pedal (5) identifies.