Method for compensating steering-torque disturbances
AssigneeFord Global Technologies, LLC
InventorsMike Mould, Peter Redlich
Life of this patent
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Abstract
The invention relates to a method for compensating steering-torque disturbances caused by unequal torque distribution at the front wheels of a motor vehicle with front-wheel drive or all-wheel drive and an active differential. In this arrangement, the magnitude of the steering-torque disturbance is determined from the torque distribution, the total torque and the steering lever and a compensation torque is exerted on the steering system by means of an active steering-servo device.
Claims4
A method for compensating steering-torque disturbances on a motor vehicle having front-wheel drive or all-wheel drive, an active differential in the drive line of the front wheels and an active steering-servo device, comprising the steps of:
- a) determining a torque distribution (tLR) between the front wheels brought about by the active differential;
- b) determining a total torque (Tges) output to the front wheels;
- and
- c) determining a compensation torque (Δτ) from the torque distribution (tLR) and the total torque (Tges) exerted on the steering system by the steering-servo device so as to compensate for disturbing forces due to unequal torque distribution.
A motor vehicle having front-wheel drive or all-wheel drive and an internal combustion engine monitored by an engine control unit, comprising:
- an active differential which connects the internal combustion engine to a pair front wheels and which is monitored by a differential control unit;
- and a steering-servo unit for producing a servo-steering torque on a steering system of the front wheels and which is monitored by a steering-servo control unit, whereby the steering-servo control unit is coupled to the engine control unit and the differential control unit and is operative to determine a compensation torque (Δτ) from the torque distribution (tLR) and the total torque (Tges) exerted on the steering system so as to compensate for disturbing forces due to unequal torque distribution.
Dependencies are inferred from the claim text.