Patent ID: 11970170
Assignee: GKN AUTOMOTIVE LIMITED
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 0:
1. A method for controlling a drive system for an axle of a motor vehicle, the drive system having at least one drive unit, a drive shaft driven by the drive unit, a first output shaft and a second output shaft, as well as a first clutch connecting the drive shaft to the first output shaft and a second clutch connecting the drive shaft to the second output shaft, and furthermore comprising a control unit for controlling the clutches; wherein the clutches are operable at least at certain operating points with a micro-slip control in which a speed differential between the drive shaft and the output shaft of more than zero revolutions per minute and no more than 50 revolutions per minute is set at the respective clutch, wherein the method comprises:
a) establishing a travelling state of the motor vehicle, wherein at least the following travel states are detected: traveling straight ahead, cornering in a push mode, and cornering in a pull mode; and
b) selecting and applying one of a plurality of control strategies for each clutch, wherein the selected and applied control strategy is different for different travel states, and
wherein the plurality of control strategies includes:
a first control strategy for a straight-ahead travel state;
a second control strategy for the cornering in the push mode travel state comprises a micro-slip control for the clutch on the inside of the curve, wherein the clutch on the outside of the curve as a function of the clutch on the inside of the curve is controlled so that a first outside torque transmitted by the clutch on the outside of the curve corresponds to a second inside torque of the clutch on the inside of the curve, said second inside torque having been varied by a factor; and
a third control strategy for the cornering in the pull mode travel state comprises a micro-slip control for the clutch on the outside of the curve, wherein the clutch on the inside of the curve is controlled as a function of the clutch on the outside of the curve such that a first inside torque transmitted by the clutch on the inside of the curve corresponds to a second outside torque of the clutch on the outside of the curve, said second outside torque having been varied by a second factor.