System and method for brake assisted vehicle turning radius reduction
AssigneeFord Global Technologies, LLC
InventorsThomas Leone, Aed M Dudar
Life of this patent
Estimating the term…
Abstract
A vehicle control system for reducing turn radius of a vehicle may include a speed sensor to determine a vehicle speed, a steering angle sensor to determine turn angle, and a controller operably coupled to the speed sensor and the steering angle sensor to determine a tight turn event based on the vehicle speed and the turn angle, responsive to the tight turn event, determine driving surface information for a surface on which the vehicle is operating, and set a target speed for an inside rear wheel of the vehicle during a turn causing the determination of the tight turn event based on the driving surface information.
Claims18
A vehicle control system for reducing turn radius of a vehicle, the system comprising:
- a speed sensor to determine a vehicle speed;
- a steering angle sensor to determine turn angle;
- and a controller operably coupled to the speed sensor and the steering angle sensor to:
- determine a tight turn event based on the vehicle speed and the turn angle, responsive to the tight turn event, utilize an onboard vehicle sensor to determine driving surface information for a surface on which the vehicle is operating, and set a target speed for an inside rear wheel of the vehicle during a turn causing the determination of the tight turn event based on the driving surface information, wherein setting the target speed for the inside rear wheel of the vehicle comprises normal balancing of an application of a positive torque and a negative torque to the inside rear wheel of the vehicle, wherein additional balancing of the application of the positive torque and the negative torque from the normal balancing is applied based on brake pad wear and electric vehicle battery charge, and wherein responsive to the brake pad wear being greater than a brake pad wear threshold, the additional balancing is applied by the application of the positive torque being increased relative to the application of the negative torque.
A method for reducing turn radius of a vehicle, the method comprising:
- determining a vehicle speed via a speed sensor;
- determining turn angle of the vehicle;
- determining a tight turn event based on the vehicle speed and the turn angle;
- responsive to the tight turn event, determining driving surface information for a surface on which the vehicle is operating;
- and
- setting a target speed for an inside rear wheel of the vehicle during a turn causing the determination of the tight turn event based on the driving surface information, wherein setting the target speed for the inside rear wheel of the vehicle comprises normal balancing of an application of a positive torque and a negative torque to the inside rear wheel of the vehicle,
- wherein additional balancing of the application of the positive torque and the negative torque from the normal balancing is applied based on brake pad wear and electric vehicle battery charge, and
- wherein responsive to the electric vehicle battery charge being lower than a battery charge threshold, the additional balancing is applied by the application of the negative torque being increased relative to the application of the positive torque.
A vehicle control system for reducing turn radius of a vehicle, the system comprising:
- a speed sensor to determine a vehicle speed;
- a steering angle sensor to determine turn angle;
- and
- a controller operably coupled to the speed sensor and the steering angle sensor to:
- determine a tight turn event based on the vehicle speed and the turn angle,
- responsive to the tight turn event, determine driving surface information for a surface on which the vehicle is operating, and
- set a target speed for an inside rear wheel of the vehicle during a turn causing the determination of the tight turn event based on the driving surface information,
- wherein setting the target speed for the inside rear wheel of the vehicle comprises normal balancing of an application of a positive torque and a negative torque to the inside rear wheel of the vehicle,
- wherein additional balancing of the application of the positive torque and the negative torque from the normal balancing is applied based on brake pad wear and electric vehicle battery charge,
- wherein responsive to the brake pad wear being greater than a brake pad wear threshold, the additional balancing is applied by the application of the positive torque being increased relative to the application of the negative torque, and
- wherein responsive to the electric vehicle battery charge being lower than a battery charge threshold, the additional balancing is applied by the application of the negative torque being increased relative to the application of the positive torque.
Dependencies are inferred from the claim text.