Adjustment of the steering feel subject to the steering speed
AssigneesThyssenkrupp Presta AG, thyssenkrupp AG
InventorImre Szepessy
Life of this patent
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Abstract
A method for operating a motor vehicle steering system may involve generating a steering feel, with a steering force assistance or a countertorque that is introduced by a feedback actuator into a steering handle, in a manner that is dependent on a driver-side manual torque applied to the steering handle. The steering feel may be represented by way of a characteristic curve that is adapted in a manner that is dependent on steering speed in the case of steering speeds above 100°/s such that an adapted characteristic curve has a smaller maximum change of the gradient than the characteristic curve in the case of lower steering speeds.
Claims14
A method for operating a steering system of a motor vehicle, the method comprising:
- generating a steering feel wherein a characteristic curve represents the steering feel;
- and
- adapting the characteristic curve based on a steering speed, wherein the characteristic curve is adapted for steering speeds above 150°/s such that an adapted characteristic curve has a smaller maximum change of gradient than the characteristic curve for steering speeds below 150°/s.
A steer-by-wire steering system for a motor vehicle, the steer-by-wire steering system comprising:
- a steering actuator that acts on steered wheels, that is regulated electronically based on a driver's steering request, and that acts on the steered wheels by way of a rack and pinion steering gear;
- and
- a feedback actuator that transmits feedback effects of a road to a steering wheel, the feedback actuator configured to provide a steering torque based on a steering angle by way of a first characteristic curve and a second characteristic curve, wherein the first characteristic curve is provided for higher steering speeds and the second characteristic curve is provided for lower steering speeds, with the first characteristic curve having a smaller maximum change of gradient than the second characteristic curve, wherein the first characteristic curve is calculatable by way of the second characteristic curve, and wherein calculating the second characteristic curve based on the first characteristic curve requires adding a constant.
An electromechanical steering system for a motor vehicle, the electromechanical steering system comprising:
- a steering pinion that is connected to a lower steering shaft and is engaged with a rack that is mounted in a housing such that the rack is displaceable along a longitudinal axis, for steering wheels;
- and
- an electric motor for steering force assistance, wherein the steering force assistance is defined by a first characteristic curve and a second characteristic curve that are base torque curves or steering column torque control curves, wherein the first characteristic curve is provided for higher steering speeds and the second characteristic curve is provided for lower steering speeds, with the first characteristic curve having a smaller maximum change of gradient than the second characteristic curve, wherein the first characteristic curve is calculatable by way of the second characteristic curve by way of scaling an X-axis.
Dependencies are inferred from the claim text.