Systems and methods for assessing health of brake rotors
AssigneeGM Global Technology Operations LLC
InventorAlaeddin BANI MILHIM
Life of this patent
Estimating the term…
Abstract
A system configured to assess health of a rotor of a friction brake configured to brake a wheel of a vehicle. The system includes a brake control module configured to actuate the friction brake at a target pressure sufficient to maintain the vehicle at a crawl speed. A diagnostic module is configured to, while the vehicle is at the crawl speed and the friction brake is at the target pressure: record rotational speed of the wheel; identify a change in the rotational speed of the wheel; and determine whether the change in the rotational speed of the wheel exceeds a predetermined threshold; generate a notification indicating that the rotor of the friction brake configured to brake the wheel is healthy; and generate a notification indicating that the rotor requires attention.
Claims20
A system configured to assess health of a rotor of a friction brake configured to brake a wheel of a vehicle, the system comprising:
- a brake control module configured to actuate the friction brake such that brake pads on opposite sides of the rotor clamp onto the rotor at a target pressure sufficient to maintain the vehicle at a crawl speed;
- and
- a diagnostic module configured to, while the vehicle is at the crawl speed and the friction brake is at the target pressure:
- record rotational speed of the wheel;
- identify a change in the rotational speed of the wheel;
- determine whether the change in the rotational speed of the wheel exceeds a predetermined threshold;
- when the change in rotational speed of the wheel does not exceed a predetermined threshold, generate a notification indicating that the rotor of the friction brake configured to brake the wheel is healthy;
- and
- when the change in the rotational speed of the wheel exceeds the predetermined threshold, generate a notification indicating that the rotor requires attention.
A system configured to assess health of a rotor of a friction brake configured to brake a wheel of a vehicle, the system comprising:
- a brake control module configured to generate a brake control signal indicating a target pressure of brake fluid to be directed to the friction brake for actuating the friction brake to clamp brake pads onto opposite sides of the rotor, the target pressure sufficient to maintain the vehicle at a crawl speed;
- a master hydraulic cylinder configured to receive the brake control signal and regulate brake fluid pressure to the friction brake based on the brake control signal to achieve the target pressure of brake fluid at the friction brake and maintain the vehicle at the crawl speed;
- and
- a diagnostic module configured to, while the vehicle is at the crawl speed, the brake fluid of the friction brake is at the target pressure, and the vehicle is traveling in a straight line:
- record rotational speed of the wheel;
- identify a change in the rotational speed of the wheel;
- determine whether the change in the rotational speed of the wheel exceeds a predetermined threshold;
- and
- when the change in the rotational speed of the wheel exceeds a predetermined threshold, generate a notification indicating that the rotor of the friction brake configured to brake the wheel requires attention.
A system configured to assess health of a rotor of a friction brake configured to brake a wheel of a vehicle, the system comprising:
- a brake control module configured to generate a brake control signal indicating a target pressure of brake fluid to be directed to the friction brake for actuating the friction brake by clamping brake pads onto opposite sides of the rotor, the target pressure sufficient to maintain the vehicle at a crawl speed;
- a master hydraulic cylinder configured to receive the brake control signal and regulate brake fluid pressure to the friction brake based on the brake control signal to achieve the target pressure of brake fluid at the friction brake and maintain the vehicle at the crawl speed;
- and
- a diagnostic module configured to, while the vehicle is at the crawl speed, the brake fluid of the friction brake is at the target pressure, and the vehicle is traveling in a straight line:
- record angular velocity of the wheel;
- determine angular acceleration of the wheel based on the angular velocity of the wheel when the target pressure of the brake fluid is achieved;
- and
- generate a rotor health notification based on an absolute value of the angular acceleration.
Dependencies are inferred from the claim text.