Patent ID: 6205386
Filing Date: 2001-03-20
Classification: B60K,B60W,F16H

Abstract:
In a motor vehicle including a transmission having an output shaft and wheels operatively connected to said transmission, a method for automatically determining the rpm ratio (i.sub.Diff) between said output shaft of said transmission and said wheels, the method comprising the steps of:detecting at least one of the following:(a1) an accelerator pedal value (.alpha.) representing the position of the accelerator pedal actuable by the driver;(b1) a motor value (Bmot) representing at least one operating parameter of the motor of said motor vehicle; and,(c1) a brake value (.beta.) representing an actuation of the brakes of said motor vehicle; and,(d1) detecting a first rpm value (Nij) representing the rpm of at least one of said wheels and detecting a second rpm value (Nab) representing the rpm of said output shaft of said transmission;forming a driving state quantity (FZ) representing a driving state of said motor vehicle in dependence upon at least one of:(a2) said detected accelerator pedal value (.alpha.);(b2) said detected motor value (Bmot); and,(c2) said detected brake value (.beta.); and,(d2) said first and second rpm values (Nij and/or Nab);determining a time-dependent change (dFZ/dt) of said driving state quantity (FZ);determining a pregivable operating state to be present when said time-dependent change (dFZ/dt) lies below a threshold value (SW2) thereby defining an essentially steady-state driving state; and,determining said rpm ratio (i.sub.Diff) in dependence upon the detected rpm values when said pregivable operating state is present.