Adaptive cruise control with user-defined lateral acceleration threshold

1. A vehicle comprising:

an engine;

an accelerator pedal; and

a controller programmed to,

command torque to the engine based on a set speed of adaptive cruise control,

in response to (i) the adaptive cruise control being active, (ii) a measured lateral acceleration of the vehicle exceeding a user-defined lateral acceleration threshold during a road curve, and (iii) the accelerator pedal being released, reduce a speed of the vehicle below the set speed until the measured lateral acceleration is less than the lateral acceleration threshold, and

in response to a brake pedal being depressed and a steering angle of the vehicle exceeding a threshold, record lateral acceleration data of the vehicle and store a value of the recorded lateral acceleration data as the user-defined lateral acceleration threshold.

2. The vehicle of claim 1 , wherein the user-defined lateral acceleration threshold is based on previously recorded lateral acceleration data of the vehicle recorded when a brake pedal is depressed.

3. The vehicle of claim 1 , wherein the reduce a speed of the vehicle includes reducing torque commanded to the engine, applying brakes of the vehicle, or both based on a target deceleration.

4. The vehicle of claim 1 , wherein the controller is further programmed to, in response to (i) the adaptive cruise control being active, (ii) the measured lateral acceleration of the vehicle exceeding the user-defined lateral acceleration threshold during the curve, and (iii) the accelerator pedal being released, inhibit a transmission upshift.

5. The vehicle of claim 1 , wherein the controller is further programmed to, in response to a brake pedal being applied during the reduction in speed of the vehicle, record a value of lateral acceleration measured when of the brake pedal is depressed and update the user-defined lateral acceleration threshold to be the value of lateral acceleration.

6. The vehicle of claim 1 , wherein the reduce a speed of the vehicle is based on a target deceleration of the vehicle.

7. The vehicle of claim 6 , wherein the target deceleration of the vehicle is based on driver history data.

8. A vehicle comprising:

an engine;

an accelerator pedal; and

a controller programmed to,

command torque to the engine based on a set speed of adaptive cruise control,

in response to (i) the adaptive cruise control being active, (ii) a measured lateral acceleration of the vehicle exceeding a user-defined lateral acceleration threshold during a road curve, and (iii) the accelerator pedal being released, reduce a speed of the vehicle below the set speed until the measured lateral acceleration is less than the lateral acceleration threshold and inhibit a transmission upshift.

9. The vehicle of claim 8 , wherein the user-defined lateral acceleration threshold is based on previously recorded lateral acceleration data of the vehicle recorded when a brake pedal is depressed.

10. The vehicle of claim 8 further comprising brakes.

11. The vehicle of claim 10 , wherein the reduce a speed of the vehicle includes reducing torque commanded to the engine, applying the brakes, or both based on a target deceleration.

12. The vehicle of claim 8 , wherein the controller is further programmed to, in response to a brake pedal being applied during the reduction in speed of the vehicle, record a value of lateral acceleration measured when of the brake pedal is depressed and update the user-defined lateral acceleration threshold to be the value of lateral acceleration.

13. The vehicle of claim 8 , wherein the reduce a speed of the vehicle is based on a target deceleration of the vehicle.

14. The vehicle of claim 13 , wherein the target deceleration of the vehicle is based on driver history data.

15. A vehicle comprising: an engine; an accelerator pedal; and a controller programmed to, command torque to the engine based on a set speed of adaptive cruise control, in response to (i) the adaptive cruise control being active, (ii) a measured lateral acceleration of the vehicle exceeding a user-defined lateral acceleration threshold during a road curve, and (iii) the accelerator pedal being released, reduce a speed of the vehicle below the set speed, based on a target deceleration of the vehicle and on driver history data, until the measured lateral acceleration is less than the lateral acceleration threshold, wherein the reduce a speed of the vehicle is based on a target deceleration of the vehicle, and wherein the target deceleration of the vehicle is based on driver history data.

16. The vehicle of claim 15 , wherein the user-defined lateral acceleration threshold is based on previously recorded lateral acceleration data of the vehicle recorded when a brake pedal is depressed.

17. The vehicle of claim 15 , wherein the reduce a speed of the vehicle includes reducing torque commanded to the engine, applying brakes of the vehicle, or both based on a target deceleration.

18. The vehicle of claim 15 , wherein the controller is further programmed to, in response to (i) the adaptive cruise control being active, (ii) the measured lateral acceleration of the vehicle exceeding the user-defined lateral acceleration threshold during the curve, and (iii) the accelerator pedal being released, inhibit a transmission upshift.

19. The vehicle of claim 15 , wherein the controller is further programmed to, in response to a brake pedal being applied during the reduction in speed of the vehicle, record a value of lateral acceleration measured when of the brake pedal is depressed and update the user-defined lateral acceleration threshold to be the value of lateral acceleration.