Method and device for determining the wear of a brake
AssigneeZF Active Safety GmbH
InventorsAndreas Marx, Nicholas Alford
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a method for determining the wear of a brake of a motor vehicle having a brake piston, an actuator, a first brake lining, a second brake lining, a friction partner and a mounting, where the brake piston is held on a spindle of the brake and can be moved axially along the spindle between the actuator and the friction partner.
Claims10
A method for determining a wear of a brake of a motor vehicle having a brake piston, an actuator, a first brake lining, a second brake lining, a friction partner and a mounting, wherein the brake piston is held on a spindle of the brake and can be moved axially along the spindle between the actuator and the friction partner, the method comprising:
- removing the first brake lining and the second brake lining from the brake;
- moving the brake piston in the direction of the actuator until the brake piston comes into contact with the actuator;
- determining a minimum spacing S0 of the brake piston from the actuator in a state in which the actuator is acted upon by the brake piston with the first brake lining and the second brake lining removed;
- moving the brake piston in the direction of the friction partner until the friction partner is in contact with the brake piston and the mounting;
- determining a maximum spacing S3 of the brake piston from the actuator in a further state in which the friction partner is acted upon by the brake piston and the mounting with the first brake lining and the second brake lining removed;
- and
- establishing a thickness of the friction partner from the maximum spacing S3 and the minimum spacing S0.
A device for determining a wear of a brake of a motor vehicle having a brake piston, an actuator, a first brake lining, a second brake lining, a friction partner and a mounting, wherein the brake piston is held on a spindle of the brake and can be moved axially along the spindle between the actuator and the friction partner, the device comprising:
- a sensor which is adapted to determine a minimum spacing S0, a maximum spacing S3, a first average spacing S1 and a second average spacing S2, wherein the actuator is acted upon by the brake piston at the minimum spacing S0 with the first brake lining and the second brake lining removed, wherein the friction partner is acted upon by the brake piston and the mounting at the maximum spacing S3 with the first brake lining and the second brake lining removed, wherein the brake piston is acted upon by the brake linings at the first average spacing S1 and the second average spacing S2 with the first brake lining and the second brake lining installed,
- wherein the device is adapted to establish a thickness of the friction partner from the maximum spacing S3 and the minimum spacing S0, and
- to determine the wear of the first brake lining and the second brake lining based on the minimum spacing S0, the first average spacing S1, and the second average spacing S2.
Dependencies are inferred from the claim text.