Brake actuator control systems and methods

Patent metadata

Field	Value
Publication number	US-12344219-B2
Application number	US-202318333722-A
Country	US
Kind code	B2
Filing date	Jun 13, 2023
Priority date	Jun 13, 2023
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A brake actuator control system for a vehicle includes: a request module configured to determine a braking request for brake actuators of the vehicle; a front bias module configured to, based on one or more operating parameters, determine a front bias for front ones of the brake actuators associated with front ones of wheels, respectively; a rear bias module configured to, based on the front bias, determine a rear bias for rear ones of the brake actuators associated with rear ones of wheels, respectively; a control module configured to: based on the braking request and the front bias, determine a front braking request; actuate the front ones of the brake actuators based on the front braking request; based on the braking request and the rear bias, determine a rear braking request; and actuate the rear ones of the brake actuators based on the rear braking request.

First claim

What is claimed is:

1. A brake actuator control system for a vehicle, comprising:
a request module configured to determine a braking request for brake actuators of the vehicle,
the brake actuators configured to, independently of each other, slow rotation of wheels, respectively, of the vehicle;
a front bias module configured to, based on one or more operating parameters, determine a front bias for front ones of the brake actuators associated with front ones of wheels, respectively;
a rear bias module configured to, based on the front bias, determine a rear bias for rear ones of the brake actuators associated with rear ones of wheels, respectively;
a control module configured to:
based on the braking request and the front bias, determine a front braking request for the front ones of the brake actuators;
actuate the front ones of the brake actuators based on the front braking request;
based on the braking request and the rear bias, determine a rear braking request for the rear ones of the brake actuators; and
actuate the rear ones of the brake actuators based on the rear braking request; and

a distribution module configured to determine a front percent based on a front static mass of the vehicle,
wherein the front bias module is configured to determine the front bias based on the front static mass and the one or more operating parameters.

2. The brake actuator control system of claim 1 wherein the one or more operating parameters includes a brake rotor temperature.

3. The brake actuator control system of claim 1 wherein the one or more operating parameters includes a parameter of an electric propulsion motor of the vehicle.

4. The brake actuator control system of claim 3 wherein the parameter is a temperature of the electric propulsion motor.

5. The brake actuator control system of claim 1 wherein the one or more operating parameters includes a mode of operation of the vehicle.

6. The brake actuator control system of claim 1 wherein the one or more operating parameters includes a propulsion torque of the vehicle.

7. The brake actuator control system of claim 1 wherein the one or more operating parameters includes a brake actuator capability.

8. The brake actuator control system of claim 1 wherein the rear bias module is configured to set the rear bias based on 100 minus the front bias.

9. The brake actuator control system of claim 1 wherein the control module is configured to:
apply power to first electric motors of the front ones of the brake actuators based on the front braking request; and
apply power to second electric motors of the rear ones of the brake actuators based on the rear braking request.

10. The brake actuator control system of claim 1 wherein the distribution module is configured to determine the front percent using one of a lookup table and an equation that relates front static masses to front percents.

11. The brake actuator control system of claim 1 further comprising a static mass module configured to determine the front static mass based on the braking request.

12. The brake actuator control system of claim 11 wherein the static mass module is configured to determine the front static mass further based on a vehicle loading parameter.

13. The brake actuator control system of claim 12 wherein the vehicle loading parameter is an indicator of whether the vehicle is towing a trailer.

14. The brake actuator control system of claim 12 wherein the vehicle loading parameter is a present load of the vehicle.

15. The brake actuator control system of claim 12 wherein the vehicle loading parameter is a mass distribution of the vehicle.

16. The brake actuator control system of claim 12 wherein the static mass module is configured to determine the front static mass using one of a lookup table and an equation that relates vehicle loading parameters and braking requests to front static masses.

17. The brake actuator control system of claim 1 wherein the control module is configured to set the front braking request based on the braking request multiplied by the front bias.

18. The brake actuator control system of claim 17 wherein the control module is configured to set the rear braking request based on the braking request multiplied by the rear bias.

19. A brake actuator control method for a vehicle, comprising:
determining a braking request for brake actuators of the vehicle,
the brake actuators configured to, independently of each other, slow rotation of wheels, respectively, of the vehicle;
based on one or more operating parameters, determining a front bias for front ones of the brake actuators associated with front ones of wheels, respectively;
determining a rear bias for rear ones of the brake actuators associated with rear ones of wheels, respectively;
based on the braking request and the front bias, determining a front braking request for the front ones of the brake actuators;
actuating the front ones of the brake actuators based on the front braking request;
based on the braking request and the rear bias, determining a rear braking request for the rear ones of the brake actuators;
actuating the rear ones of the brake actuators based on the rear braking request; and
determining a front percent based on a front static mass of the vehicle,
wherein determining the front bias includes determining the front bias based on the front static mass and the one or more operating parameters.

20. The brake actuator control method of claim 19 wherein the one or more operating parameters includes a brake rotor temperature.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Larson Bryan
• Ridenour Nicholas Reilly
• Steele Samuel
• Heil Edward Thomas

Classifications

• B60W2720/403

  between front and rear axle · CPC title

• B60W2710/083

  Torque · CPC title

• B60L2240/423

  Torque · CPC title

• B60L2240/425

  Temperature · CPC title

• B60W30/18109

  Braking · CPC title