Device for determining a state of wear of a wiper blade

Inventors: Frederic Giraud (Le Mesnil Saint Denis, FR); Alexandre Filloux (Le Mesnil Saint Denis, FR)

Assignee: Valeo Systemes d'Essuyage

G07C5/0808 B60S1/08

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Quick Facts

Patent No.: US 12688740
App. No.: 18/575,314
Granted: Jul 21, 2026
Kind: B2

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Abstract

A device for determining a state of wear of a wiper blade for a wiper system is disclosed. The device is configured to be fitted in a motor vehicle. The device for determining a state of wear includes an angular position sensor configured to measure at least one datum relating to a wiper blade during a wiping operation and an electronic control unit configured to determine the state of wear of the wiper blade as a function of the at least one datum measured by the angular position sensor.

Claims (26)

1 . A wiper system for a motor vehicle comprising:

at least one wiper blade;

a drive arm for the at least one wiper blade;

a drive motor for the drive arm;

a device for determining a state of wear of the at least one wiper blade, wherein the device is configured to be fitted in the motor vehicle, the device comprising:

an angular position sensor mounted on a shaft of the drive motor and configured to measure an angular position of the at least one wiper blade during a wiping operation, and

an electronic control unit configured to:

calculate an angular acceleration of the at least one wiper blade from the angular position; and

determine the state of wear of the at least one wiper blade by comparing the angular acceleration with at least one parameter representative of a known state of wear.

2 . A method for determining a state of wear of a wiper blade for a wiper system,

wherein the wiper system is configured to be fitted in a motor vehicle, the wiper system comprising:

at least one wiper blade;

a drive arm for the at least one wiper blade;

a drive motor for the drive arm;

a device for determining the state of wear of the at least one wiper blade, wherein the device is configured to be fitted in the motor vehicle, the device comprising:

an angular position sensor mounted on a shaft of the drive motor; and

an electronic control unit;

the method comprising:

measuring, by the angular position sensor, an angular position of the at least one wiper blade during a wiping operation,

calculating, using the electronic control unit, an angular acceleration of the at least one wiper blade from the angular position, and

determining, using the electronic control unit, the state of wear of the at least one wiper blade by comparing the angular acceleration with at least one parameter representative of a known state of wear.

3 . The method for determining the state of wear as claimed in claim 2 ,

wherein the at least one parameter representative of the known state of wear is a profile of evolution of the angular acceleration over a time interval or an average value.

4 . The method for determining the state of wear as claimed in claim 2 ,

wherein, during comparison, the angular acceleration is compared, by the electronic control unit, with a plurality of parameters,

wherein each parameter is representative of a respective known state of wear.