Methods and apparatus to dynamically determine brake pad wear
AssigneeFord Global Technologies, LLC
InventorsYun Xing, John Erik Mikael Hellstrom
Life of this patent
Estimating the term…
Abstract
Methods and apparatus to sense brake pad wear are disclosed. An example apparatus includes at least one memory device and at least one processor to execute instructions to, in response to an anti-lock braking system event, determine a volume of brake fluid in a brake piston chamber based on a flow rate of the brake fluid and a pressure within the brake piston chamber, and determine at least one of a thickness of a brake pad or a wear of the brake pad based on the volume of the brake fluid in the brake piston chamber and a volume of the brake piston chamber.
Claims20
An apparatus comprising:
- at least one memory device;
- and
- at least one processor to execute instructions to, in response to an anti-lock braking event:
- determine a volume of brake fluid in a brake piston chamber based on a relationship between the volume, a flow rate of the brake fluid, and a pressure within the brake piston chamber;
- and
- determine at least one of a thickness of a brake pad or a wear of the brake pad based on the volume of the brake fluid in the brake piston chamber and a volume of the brake piston chamber.
A method to dynamically determine brake pad wear comprising:
- determining, in response to an anti-lock braking event, a volume of a brake fluid in a brake piston chamber based on a flow rate of the brake fluid and a change in pressure inside the brake piston chamber from a first pressure to a second pressure during the anti-lock braking event, the first pressure and the second pressure to vary for different braking events;
- and
- determining at least one of a thickness of a brake pad or a wear of the brake pad based on the volume of the brake fluid in the brake piston chamber and a volume of the brake piston chamber.
An apparatus to dynamically determine brake pad wear in a vehicle comprising:
- a memory;
- and
- a brake wear controller to:
- identify a status of a braking event;
- determine a volume of brake fluid in a brake piston chamber based on a relationship between the volume, a flow rate of the brake fluid, a bulk modulus of the brake fluid, and a pressure inside the brake piston chamber;
- and
- determine at least one of a brake pad thickness or a brake pad wear based on the volume of brake fluid in the brake piston chamber and a volume of the brake piston chamber.
Dependencies are inferred from the claim text.