| 摘要 |
<p>The invention relates to a method for controlling an automatic gearbox, taking account of a set speed of the vehicle. The method is characterised in that the following steps are performed successively: calculation (2) of the resistive forces being applied to the vehicle (4), on the basis of an item of information relating to the real speed of the vehicle (Vv) and the torque delivered by the engine (Cm); as a function of the aforementioned resistive forces (4) and a pre-defined ratio shift time (t1), calculation (6) of the speed losses of the vehicle (8) caused by the planned speed ratio shift; as a function of a pre-defined maximum admissible catch-up time (t2) in order to reach the set speed, calculation of the level of acceleration (12) necessary for the vehicle to return to the set speed within said maximum time; and selection (18), from among the different speed ratios that can be provided at that particular moment by the gear box, of the speed ratio that can deliver the necessary level of acceleration (12).</p> |
