Method for controlling a power train of a vehicle, and corresponding device and vehicle

Abstract

A method controls a power train of a vehicle immobilized in a parking position, the vehicle being provided with a parking brake device for immobilizing the vehicle and at least one electric motor. The method includes detecting the slope direction and / or slope data when the parking brake device is in an actuated position, detecting that the parking brake device has switched from the actuated position to a released position, and applying a motor torque setpoint to the electric motor in accordance with the detected slope direction and / or slope data.

Description

1. FIELD OF THE INVENTION[0001]The invention relates to the field of motor vehicles, in particular any electric or hybrid vehicle equipped with at least one electric motor. The invention relates to a method for controlling a power train of a vehicle when the vehicle is immobilized on a surface exhibiting a slope of any kind. It also relates to a device as well as to the corresponding vehicle.2. PRIOR ART[0002]In an electric or hybrid vehicle, at least one electric motor generates a motor torque which is transmitted to the wheels by means of a reduction gear mechanism in order to drive the vehicle. The electric motor is connected to the vehicle by means of mounts making it possible to limit the propagation of the vibrations generated by the electric motor. When the vehicle is immobilized by a parking brake device on a surface, such as a car park or a road exhibiting a more or less steep slope, a force which is dependent on the mass of the vehicle and on the angle of the slope may be ...

AI Technical Summary

Benefits of technology

The technical effect of the invention is to prevent the sudden tilting of the electric motor in a power train of a vehicle when the parking brake device moves from an applied position to a released position, which can cause oscillations, vibrations and noises inside the vehicle. The solution is to use a torque setpoint to maintain the motor in its initial position and return it to its position of equilibrium when the vehicle is on a surface without any slope. This results in an improved management and control of the motor's "liberation" from the applied position to the released position.

Problems solved by technology

One of the problems associated with this force resides in the fact that it leads to tilting of the electric motor about a position of equilibrium corresponding to a neutral or stable position (zero slope).

However, this control method does not make it possible to prevent the electric motor from tilting about its stable position of equilibrium, in particular when the parking brake device moves from an applied position to a released position and, in particular, if the surface on which the vehicle is immobilized exhibits a slope.

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