METHOD FOR DYNAMIC CONTROL OF FOUR-WHEEL DRIVE MOTOR VEHICLE TRAINS, CONTROL MEANS, VEHICLE AND PROGRAM BASED ON SUCH A METHOD

Abstract

The invention relates to a method for controlling wheel assemblies (12, 17) of a powertrain of a four-wheel-drive motor vehicle, comprising the following steps: determining: – a torque setpoint from the driver; – a distribution ratio of said torque setpoint between said wheel assemblies (12, 17); – a derivative of said distribution ratio; – whether the motor vehicle is in sledding mode; – torque gradient derivatives to be applied to said wheel assemblies (12, 17) depending on whether the vehicle is in sledding mode or not; filtering said torque gradient derivatives to avoid oscillations on said wheel assemblies (12, 17); and controlling the torques applied to said wheel assemblies (12, 17) as a function of the filtered torque gradient derivatives. The invention also relates to a program, a control means, and a vehicle based on such a method. Figure 1

Claims

torque to be applied to the rear wheel set (17) is determined by means of the formula: v-cons _ 1 rrcafis\ ^ccms . G-” Æ XG “F | 1 - £V 1 X G.- ' where Te is also a calculation time for the ^cons function, and in that if the vehicle is in sled mode, then the torque gradient to be applied to the rear wheel set (17) is determined by means of the formula: ^cbns / ^cons\ CAR “ ' (CAV )'

2. Control method according to claim 1, characterized in that the step of filtering the torque gradient to be applied to the front wheel set (12) and the torque gradient to be applied to the rear wheel set (17) is carried out respectively by means of a first filtering means (FAV), and a second filtering means (FAR).

3. Control method according to any one of claims 1 to 2, characterized in that the steps are implemented by a control means (11).

4. Control means (11) implementing the control method according to claim 3.

5. Motor vehicle implementing the control method according to any one of claims 1 to 3.

6. A computer program comprising program code instructions for executing the steps of the control method according to any one of claims 1 to 3, when said program is running on a computer. [Fig. 1]

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