Control system for brake-steer assisted parking and method therefor
AssigneeFord Global Technologies, LLC
InventorsJianbo Lu, Timothy G. Offerle, Hongtei E. Tseng, Douglas S. Rhode, Gregory P. Brown
Life of this patent
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Abstract
A system and method of controlling an automotive vehicle includes determining a steering wheel angle, determining a steering wheel direction, determining a steering wheel angular rate and applying brake-steer as a function of steering wheel angle, steering wheel angular rate and steering wheel direction.
Claims50
A method of controlling an automotive vehicle having a turning radius comprising:
- determining a steering wheel angle;
- determining a steering wheel direction;
- determining a steering wheel angular rate and
- applying brake-steer as a function of steering wheel angle, steering wheel angular rate and steering wheel direction, wherein the steering wheel direction comprises an increasing direction and a decreasing direction, wherein applying brake-steer comprises applying brake-steer using a first boost curve in a first direction and applying brake-steer using a second boost curve in a second direction, and wherein the first boost curve is different than the second boost curve.
A method of controlling an automotive vehicle comprising:
- detecting a parking mode;
- in the parking mode, when the steering wheel angle is increasing applying brake-steer using a first boost curve;
- and
- when the steering wheel angle is decreasing applying brake-steer using a second boost curve different than the first boost curve.
A method of controlling an automotive vehicle having a turning radius comprising:
- detecting a parking mode;
- in the parking mode, applying a first positive torque to a first driven wheel;
- simultaneously with the step of applying a first positive torque, applying a second positive torque greater than the first positive torque to a second wheel so that the turning radius of the vehicle is reduced;
- and
- determining a brake pressure request, and discontinuing the steps of applying a first positive torque and a second positive torque when said request is greater than a predetermined threshold.
A method of controlling an automotive vehicle having a turning radius comprising:
- detecting a parking mode;
- detecting a transfer case mode;
- applying brake-steer in response to a parking mode and a transfer case mode, wherein applying brake-steer comprises proportioning front wheel and rear wheel brakes based on the transfer case mode.
A vehicle comprising:
- a traction control system;
- means to determine a parking mode;
- and
- a controller coupled to the means to determine a parking mode, said controller programmed to, in the parking mode, apply a first positive torque, as a function of said traction control system, to a first driven wheel and simultaneously with applying the first positive torque, apply a second positive torque greater than the first positive torque to a second wheel so that the turning radius of the vehicle is reduced.
Dependencies are inferred from the claim text.