Patent ID: 6314356
Filing Date: 2001-11-06
Classification: F16H

Abstract:
A method for controlling an electrohydraulically actuated automatic transmission driven by an internal combustion engine in which an electronic gear control selects, according to at least one input variable, a shift characteristic program from one of a plurality of shift characteristic programs, the method comprising the steps of:a) detecting a cold start condition of the internal combustion engine;b) selecting a desired warm-up shift characteristic program from a plurality of warm-up shift characteristic programs which only allow relatively higher shift points;c) calculating, from a torque (MM) generated by the internal combustion engine and a rotational speed (nMOT) of the internal combustion, an actual power value (P(i)=MM(i).multidot.nMOT(i).multidot.K);d) calculating an energy operational capacity (E) by summing up the actual power values (P(i)) over a predetermined period of time (E=(P(i)+P(i+1)).times.dt); ande) deactivating the warm-up shift characteristic program, when a sum of the energy operational capacity (SUM(E)) exceeds a power limit value (GW), to thereafter only allow shift characteristic programs having relatively lower shift points.