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Autonomous Tire Sensors

Search All Applications in Autonomous Tire Sensors


Application US20200070589


Published 2020-03-05

Method, Control Device, And System For Determining A Profile Depth Of A Profile Of A Tyre

A method for determining a tread depth of a tread of a tire during operation of a vehicle comprising the tire, a controller for a vehicle for determining a tread depth of a tread of a tire of the vehicle, and a system for a vehicle, comprising such a controller and at least one electronic wheel unit, wherein there is provision to determine the tread depth based on a determined instantaneous dynamic wheel radius of a wheel, comprising the tire, of the vehicle and a determined instantaneous dynamic inside radius of the tire are disclosed. To improve the accuracy of determination of the tread depth a correction variable predetermined for the type of tire is taken into consideration, which correction variable characterizes the relationship between a change in the tread depth, and a change resulting therefrom in the difference between the dynamic wheel radius and the dynamic inside radius.


Classification


Slightly More than Average Length Specification


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USPTO Full Text Publication >

2 Independent Claims

  • Independent Claim 1. A method for determining a tread depth of a tread of a tire during operation of a vehicle comprising the tire comprising: determining an instantaneous rotational speed of a wheel, comprising the tire, of the vehicle based on data determined by at least one first sensor, determining an instantaneous speed of the vehicle based on data determined by at least one second sensor different from the at least one first sensor, determining an instantaneous dynamic wheel radius of the wheel comprising the tire, based on the determined instantaneous rotational speed and the determined instantaneous speed of the vehicle, determining at least one first operating parameter of the tire, selected from the group consisting of an instantaneous tire temperature, an instantaneous tire pressure and an instantaneous tire load, determining an instantaneous dynamic inside radius of the wheel based on the at least one determined first operating parameter, wherein the inside radius of the wheel is the distance between the wheel center and the tire-side start of the tread, determining a tread depth of the tread of the tire based on the determined instantaneous dynamic wheel radius and the determined instantaneous dynamic inside radius, wherein the tread depth is determined taking into consideration a correction variable for the type of tire, wherein the correction variable characterizes the relationship between a change in the tread depth and a change resulting therefrom in the difference between the dynamic wheel radius and the dynamic inside radius.

  • Independent Claim 11. A controller for a vehicle for determining a tread depth of a tread of a tire of the vehicle comprising: a reception device configured to receive an instantaneous rotational speed of a wheel, comprising the tire, of the vehicle, an instantaneous speed of the vehicle and at least one first operating parameter of the tire, selected from the group consisting of an instantaneous tire temperature, an instantaneous tire pressure and an instantaneous tire load, a first determination device, configured to determine an instantaneous dynamic wheel radius of the wheel comprising the tire based on the received instantaneous rotational speed and the received instantaneous speed of the vehicle a second determination device, configured to determine an instantaneous dynamic inside radius of the wheel based on the at least one received first operating parameter, wherein the inside radius of the wheel is the distance between the wheel center and the tire-side start of the tread, and a third determination device, configured to determine a tread depth of the tread of the tire based on the determined instantaneous dynamic wheel radius and the determined instantaneous dynamic inside radius, wherein the third determination device is configured to determine the tread depth taking into consideration a correction variable predetermined for the type of tire, wherein the correction variable characterizes the relationship between a change in the tread depth and a change resulting therefrom in the difference between the dynamic wheel radius and the dynamic inside radius.