Method and system for monitoring a tyre

Patent metadata

Field	Value
Publication number	US-2016229235-A1
Application number	US-201415023198-A
Country	US
Kind code	A1
Filing date	Sep 12, 2014
Priority date	Sep 27, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

A method for monitoring a tire of a motor vehicle, implemented in a wheel and including: measuring a temperature of the tire, measuring a pressure of the tire, calculating a variation, in absolute value, of the ratio between the measured pressure and the measured temperature, comparing the calculated variation to a predetermined threshold, and sending an alert message to a computer of the vehicle if the calculated variation is above the predetermined threshold.

First claim

1 - 8 . (canceled)

9 . A method for monitoring a tire of a motor vehicle, implemented in a wheel including the tire, the method comprising:
measuring a temperature in the tire; measuring a pressure in the tire; calculating a variation, as an absolute value, of the ratio between the measured pressure and the measured temperature, over a period of time less than a predetermined duration; comparing the calculated variation to a predetermined threshold; and sending an alert message to a computer of the vehicle if the calculated variation is above the predetermined threshold over the time period.

10 . The monitoring method as claimed in claim 9 , wherein the alert message comprises the sign of the calculated variation.

11 . The monitoring method as claimed in claim 9 , wherein the alert message comprises the absolute value of the calculated variation, and the value of the time period.

12 . The monitoring method as claimed in claim 9 , wherein the alert message comprises measurement values of the measured pressure and of the measured temperature over the time period.

13 . The monitoring method as claimed in claim 9 , wherein the alert message is encrypted.

14 . A system for monitoring a tire of a motor vehicle, the system being situated in the tire, and comprising:
means for measuring a temperature of the tire; means for measuring a pressure of the tire; calculation means configured to calculate a variation, as an absolute value, of the ratio between the pressure measured by the pressure measurement means, and the temperature measured by the temperature measurement means, over a time period less than a predetermined duration; means for comparing the variation to a predetermined threshold; and means for sending an alert message to a computer of the vehicle if the variation is above a predetermined threshold over the time period.

15 . The system for monitoring a tire of a motor vehicle as claimed in claim 14 , wherein the alert message comprises at least one information item chosen from:
the sign of variation of the ratio between the measured pressure and the measured temperature, the absolute value of the variation of the ratio between the measured pressure and the measured temperature, the value of the time period, or measurement values of the measured pressure and of the measured temperature over the time period.

16 . The system for monitoring a tire of a motor vehicle as claimed in claim 14 , wherein the sending means comprises means for encrypting the alert message.

Assignees

• Renault Sa

Inventors

• Saint-Loup Philippe
• Monti Alessandro
• Guillerey Bernard

Classifications

• B60C23/0476 Primary

  Temperature compensation of measured pressure values · CPC title

• B60C23/0474 Primary

  Measurement control, e.g. setting measurement rate or calibrating of sensors; Further processing of measured values, e.g. filtering, compensating or slope monitoring · CPC title

• G08B21/182

  Level alarms, e.g. alarms responsive to variables exceeding a threshold · CPC title

• B60C23/0486

  comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors · CPC title