Vehicle drivetrain and clutch unit for distributing torque
AssigneeGKN Automotive AG
InventorsFrank Discher, Kai Sorge
Life of this patent
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Abstract
Operating a drive train of a vehicle with a clutch unit for distributing torque on a primary axis and a secondary axis of the vehicle comprises: a) determining an available drive torque; b) determining excess torque on the primary axis; c) determining an actual maximum torque on the secondary axis; d) determining the excess torque on the secondary axis insofar as the maximum torque is not exceeded.
Claims18
A method for operating a drive train of a vehicle with a clutch unit for distributing torque at a primary axle and a secondary axle of the vehicle, wherein the method comprises at least the following steps:
- (a) determining an available drive torque;
- (b) determining excess torque at the primary axle;
- (c) determining a current maximum torque at the secondary axle;
- and
- (d) making available the excess torque to the secondary axle in so far as said excess torque does not exceed the current maximum torque;
- wherein an engine torque which is requested by the driver is detected and taken into account, wherein the clutch unit is actuated predictively.
An electronic control unit device programmed for the variable distribution of torque between different axles of the vehicle, wherein the device is programmed to carry out at least the following steps:
- (a) determining an available drive torque;
- (b) determining excess torque at the primary axle;
- (c) determining a current maximum torque at the secondary axle;
- and
- (d) making available the excess torque to the secondary axle in so far as said excess torque does not exceed the current maximum torque;
- wherein the clutch unit is actuated predictively, at least in that one of (a) an engine torque which is requested by the driver is detected and taken into account and (b) no difference in rotational speed is produced between the primary axle and the secondary axle.
Dependencies are inferred from the claim text.