Method for controlling a power train of a vehicle, and corresponding device and vehicle
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.
1. A method for controlling a power train of a vehicle immobilized in a parking position, the vehicle being equipped with a parking brake device for immobilizing the vehicle and with at least one electric motor, the method comprising:
applying the parking brake to an applied position by inserting a blocking finger of the parking brake into an interdental space of a toothed wheel attached connected to a transmission shaft of the electric motor;
detecting a direction of and/or data for a slope when the parking brake device is in the applied position, including detecting a rotation of the toothed wheel via an angular position sensor to determine the direction of and/or the data for the slope;
detecting a transition of the parking brake device from the applied position to a released position; and
applying a motor torque setpoint to the electric motor on the basis of the detected direction of and/or the data for the slope.
2. The method as claimed in claim 1 , further comprising progressive transiting from a non-zero value of the motor torque setpoint towards a zero value.
3. The method as claimed in claim 1 , wherein the applying the motor torque setpoint is maintained from a start of the transition from the applied position to an end of the transition to the released position.
4. The method as claimed in claim 1 , wherein the transition of the parking brake device from the applied position to the released position, and back again, is implemented by actuating a means for controlling the parking brake device.
5. The method as claimed in claim 1 , wherein the detecting the direction of the slope is carried out when a control unit of the parking brake device is in a position of disengagement and when the parking brake device is in the applied position.
6. The method as claimed in claim 1 , wherein the detecting the direction of and/or the data for the slope further comprises determining a value of the slope.
7. The method as claimed in claim 6 , wherein the detecting the direction of and/or the data for the slope and the determining the value of the slope are concurrent.
8. The method as claimed in claim 1 , wherein the detecting the direction of and/or the data for the slope further comprises detecting a direction of tilting of the electric motor in relation to a neutral position of said electric motor.
9. The method as claimed in claim 1 , further comprising storing the direction of and/or the detected data for the slope.
10. A device for controlling a power train of a vehicle immobilized in a parking position, the vehicle being equipped with a parking brake device for immobilizing the vehicle and with at least one electric motor, the device comprising:
a controller configured to apply the parking brake to an applied position by inserting a blocking finger of the parking brake into an interdental space of a toothed wheel attached connected to a transmission shaft of the electric motor
means for detecting a direction of and/or data for a slope when the parking brake device is in the applied position, the means for detecting including an angular sensor that detects a rotation of the toothed wheel to determine the direction of and/or the data for the slope;
means for detecting a transition of the parking brake device from the applied position to a released position; and
means for applying a motor torque setpoint to the electric motor on the basis of the detected direction of and/or the data for the slope.
11. A motor vehicle, comprising:
a power train;
a parking brake device to immobilize the vehicle in a parking position;
at least one electric motor; and
the device for controlling said power train as claimed in claim 10 .
12. The device for controlling said power train as claimed in claim 10 , wherein the means for detecting the transition of the parking brake device includes a position sensor.
13. The device for controlling said power train as claimed in claim 10 , wherein the means for applying the motor torque setpoint includes at least one control computer.
14. The device for controlling said power train as claimed in claim 13 , wherein the control computer is an electronic control unit.