Vehicle, system, and method for controlling active aerodynamic elements

• US 10,065,688 B2
• Filed: 07/18/2016
• Issued: 09/04/2018
• Est. Priority Date: 09/25/2015
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Heil, Edward T., Rhee, Jason S., Tan, Hualin, Auden, Joshua R., Fahland, Jason D., Irwin, Kevin
• Primary Examiner(s): Badii, Behrang
• Assistant Examiner(s): Greene, Daniel Lawson
• Application Number:
  US15/212,929
• Publication Number:
  US 20170088201A1
• Time in Patent Office: 778 Days
• CPC Class Codes: B62D 35/005 Front spoilers B62D35/001 takes precedence
• CPC Class Codes: B62D 35/007 Rear spoilers B62D35/001 takes precedence
• CPC Class Codes: B62D 37/02 by aerodynamic means
• CPC Class Codes: Y02T 10/82 Elements for improving aerodynamics
• CPC Class Codes: Y02T 10/88 Optimized components or subsystems, e.g. lighting, actively controlled glasses

Abstract

A vehicle includes a motor for propelling the vehicle and at least one active aerodynamic element configured to generate a variable amount of aerodynamic downforce on the vehicle when the vehicle is in motion. The vehicle also includes at least one driver input sensor configured to detect a driver input and generate a feedforward signal indicative of a desired behavior of the vehicle. The vehicle additionally includes a controller in communication with the at least one driver input sensor and the at least one active aerodynamic element and configured to regulate the at least one active aerodynamic element at least partially in response to the feedforward signal. A method for controlling such an active aerodynamic element and a system for controlling an aerodynamic downforce on a vehicle are also disclosed.

Claims

1. A vehicle comprising:

a motor configured to propel the vehicle;

at least one active aerodynamic element configured to generate a variable amount of aerodynamic downforce on the vehicle when the vehicle is in motion;

at least one driver input sensor configured to detect a driver input and generate a feedforward signal indicative of a desired behavior of the vehicle; and

a controller in communication with the at least one driver input sensor and the at least one active aerodynamic element and configured to regulate the at least one active aerodynamic element at least partially in response to the feedforward signal.

2. The vehicle according to claim 1, wherein each of the at least one active aerodynamic element includes an actuator configured to one of change a shape of and reposition the respective active aerodynamic element relative to the vehicle to thereby vary the amount of the aerodynamic downforce on the vehicle, and wherein the controller is configured to control the actuator at least partially in response to the feedforward signal.

3. The vehicle according to claim 1, further comprising a steering wheel, an accelerator device configured to regulate a torque output of the motor, and a brake lever configured to retard the motion of the vehicle, wherein the at least one driver input sensor includes at least one of:

a steering wheel sensor configured to detect a rotational position of the steering wheel;

an accelerator device sensor configured to detect a position of the accelerator device; and

a brake lever sensor configured to detect a position of the brake lever.

4. The vehicle according to claim 3, wherein the at least one driver input sensor includes the steering wheel sensor, and wherein the controller is configured to determine, using the detected rotational position of the steering wheel, that the desired behavior of the vehicle is a desired lateral acceleration of the vehicle during cornering, such that the generated feedforward signal is indicative of the desired lateral acceleration.

5. The vehicle according to claim 4, further comprising at least one vehicle performance sensor in communication with the controller and configured to detect actual behavior of the vehicle and generate a feedback signal indicative of the detected actual behavior of the vehicle.

6. The vehicle according to claim 5, further comprising a road wheel, wherein the motor is coupled to the road wheel to propel the vehicle, and wherein the at least one vehicle performance sensor includes at least one of:

a wheel speed sensor configured to detect a rotating speed of the road wheel;

an accelerometer configured to detect lateral or longitudinal acceleration of the vehicle; and

a yaw-rate sensor configured to detect an angular velocity of the vehicle.

7. The vehicle according to claim 6, wherein the controller is configured to determine an actual lateral acceleration of the vehicle using the at least one vehicle performance sensor and additionally regulate the at least one active aerodynamic element in response to the desired lateral acceleration and the determined actual lateral acceleration of the vehicle.

8. A method for controlling an active aerodynamic element of a vehicle, the method comprising:

detecting and communicating via at least one driver input sensor a driver input signal indicative of a desired behavior of the vehicle when the vehicle is in motion;

receiving, via a controller, the at least one driver input signal;

determining, via the controller, an aerodynamic downforce target utilizing the at least one driver input signal;

generating, via the controller, a feedforward signal in response to the determined aerodynamic downforce target; and

actuating, via the controller, the active aerodynamic element at least partially in response to the feedforward signal to vary an amount of aerodynamic downforce on the vehicle.

9. The method according to claim 8, wherein said receiving, via the controller, the at least one driver input signal includes receiving a plurality of driver input signals, and said determining the aerodynamic downforce target includes summing the plurality of received driver input signals to generate a continuous feedforward signal.

10. The method according to claim 8, wherein active aerodynamic element includes an actuator configured to one of change a shape of and reposition the respective active aerodynamic element relative to the vehicle to thereby vary the amount of the aerodynamic downforce on the vehicle, and said actuating the at least one active aerodynamic element includes controlling the actuator, via the controller.

11. The method according to claim 8, wherein the vehicle includes a steering wheel and the at least one driver input sensor includes a steering wheel sensor configured to detect a rotational position of the steering wheel, the method further comprising determining, via the controller using the detected rotational position of the steering wheel, that the desired behavior of the vehicle is a desired lateral acceleration of the vehicle during cornering.

12. The method according to claim 11, wherein said generating the feedforward signal is indicative of the desired lateral acceleration.

13. The method according to claim 12, wherein the vehicle includes at least one vehicle performance sensor, the method further comprising:

detecting actual behavior of the vehicle and generating a feedback signal indicative of the detected actual behavior of the vehicle via the least one vehicle performance sensor; and

determining, via the controller, an actual lateral acceleration of the vehicle using the at least one vehicle performance sensor.

14. The method according to claim 13, further comprising regulating the at least one active aerodynamic element in response to the desired lateral acceleration and the determined actual lateral acceleration of the vehicle.

15. A system for controlling an aerodynamic downforce on a vehicle, the system comprising:

at least one active aerodynamic element configured to generate a variable amount of the aerodynamic downforce on the vehicle when the vehicle is in motion;

at least one driver input sensor configured to receive a driver input and generate a driver input signal indicative of a desired behavior of the vehicle;

a controller in communication with the at least one active aerodynamic element and the at least one driver input sensor and configured to;

receive the at least one driver input signal from the at least one driver input sensor;

determine an aerodynamic downforce target utilizing the at least one driver input signal;

generate a feedforward signal in response to the determined aerodynamic downforce target; and

actuate the at least one active aerodynamic element at least partially in response to the feedforward signal.

16. The system according to claim 15, wherein the controller is configured to receive a plurality of driver input signals, and additionally configured to determine the aerodynamic downforce target by summing the plurality of received driver input signals to generate a continuous feedforward signal.

17. The system according to claim 15, wherein each of the at least one active aerodynamic element includes an actuator configured to one of change a shape of and reposition the respective active aerodynamic element relative to the vehicle to thereby vary the amount of the aerodynamic downforce on the vehicle, and the controller is additionally configured to actuate the at least one active aerodynamic element via controlling the actuator.

18. The system according to claim 15, wherein the vehicle includes a steering wheel and the at least one driver input sensor includes a steering wheel sensor configured to detect a rotational position of the steering wheel, and wherein the controller is additionally configured to determine, using the detected rotational position of the steering wheel, that the desired behavior of the vehicle is a desired lateral acceleration of the vehicle during cornering.

19. The system according to claim 18, wherein the generated feedforward signal is indicative of the desired lateral acceleration.

20. The system according to claim 19, wherein the vehicle includes at least one vehicle performance sensor in communication with the controller and configured to detect actual behavior of the vehicle and generate a feedback signal indicative of the detected actual behavior of the vehicle, and wherein the controller is additionally configured to determine an actual lateral acceleration of the vehicle using the at least one vehicle performance sensor and regulate the at least one active aerodynamic element in response to the desired lateral acceleration and the determined actual lateral acceleration of the vehicle.