Compensating footprint length for inflation pressure changes

Patent metadata

Field	Value
Publication number	US-2025153518-A1
Application number	US-202418883225-A
Country	US
Kind code	A1
Filing date	Sep 12, 2024
Priority date	Nov 13, 2023
Publication date	May 15, 2025
Grant date	—

Abstract

Disclosed are various embodiments for compensating footprint length for inflation pressure changes in tires. Various embodiment can receive a tire pressure measurement for a tire and an uncompensated footprint length for the tire. Various embodiments can calculate an inflation difference between the tire pressure measurement and a target tire pressure for the tire. Then, various embodiments can calculate an inflation ratio by at least on finding a quotient of the inflation difference over the target tire pressure for the tire. Based at least on the inflation ratio, various embodiments can determine a compensated footprint length. Then, various embodiments can send the compensated footprint length to a vehicle system.

First claim

Therefore, the following is claimed:

1 . A method, comprising:
receiving, from a sensor, a tire pressure measurement for a tire; receiving, from the sensor, an uncompensated footprint length for the tire; calculating an inflation difference between the tire pressure measurement and a target tire pressure for the tire; calculating an inflation ratio by at least on finding a quotient of the inflation difference over the target tire pressure for the tire; determining a compensated footprint length based at least in part on the inflation ratio; and sending the compensated footprint length to a vehicle computing system.

2 . The method of claim 1 , wherein determining the compensated footprint length based at least in part on the inflation ratio comprises:
calculating an inflation scale by summing inflation ratio and a fixed value; and calculating the compensated footprint length by taking product of the uncompensated footprint length with the inflation scale.

3 . The method of claim 1 , wherein the inflation ratio is further calculated by multiplying the quotient by a sensor compensation value.

4 . The method of claim 3 , further comprising determining the sensor compensation value based at least on a calibration of the sensor.

5 . The method of claim 1 , wherein sending the compensated footprint length to the vehicle computing system causes a pressure regulator to adjust the tire pressure of the tire to achieve the compensated footprint length by at least:
sending, to the vehicle computing system, an instruction to modify the tire pressure; receiving, from the sensor, an updated footprint length for the tire; and sending, to the vehicle computing system and based at least on a determination that the updated footprint length matches the compensated footprint length, an instruction to cease modifying the pressure.

6 . The method of claim 5 , wherein the instruction to modify the pressure is an instruction to increase the tire pressure by adding gasses to the tire.

7 . The method of claim 5 , wherein the instruction to modify the pressure is an instruction to decrease the tire pressure by releasing gasses from the tire.

8 . The method of claim 1 , wherein the sensor calculates the tire pressure measurement by sampling the tire pressure periodically and determining an average tire pressure measurement for a tire pressure period.

9 . The method of claim 1 , wherein the tire pressure measurement is an instantaneous measurement of the tire pressure at a specified point in time.

10 . A system, comprising:
a computing device comprising a processor and a memory; and machine-readable instructions stored in the memory that, when executed by the processor, cause the computing device to at least:
receive, from a sensor, a tire pressure measurement for a tire;
receive, from the sensor, an uncompensated footprint length for the tire;
calculate an inflation difference between the tire pressure measurement and a target tire pressure for the tire;
calculate an inflation ratio by at least on finding a quotient of the inflation difference over the target tire pressure for the tire;
determine a compensated footprint length based at least in part on the inflation ratio.

11 . The system of claim 10 , wherein the machine-readable instructions that determine the compensated footprint length based at least in part on the inflation ratio further cause the computing device to at least:
calculate an inflation scale by summing inflation ratio and a fixed value; and calculate the compensated footprint length by taking product of the uncompensated footprint length with the inflation scale.

12 . The system of claim 10 , wherein the inflation ratio is further calculated by multiplying the quotient by a sensor compensation value.

13 . The system of claim 12 , wherein the machine-readable instructions further cause the computing device to at least determine the sensor compensation value based at least on a calibration of the sensor.

14 . The system of claim 10 , wherein the machine-readable instructions further cause the computing device to at least send the compensated footprint length to a vehicle computing system, which causes a pressure regulator to adjust the tire pressure of the tire to achieve the compensated footprint length by at least:
sending, to the vehicle computing system, an instruction to modify the tire pressure; receiving, from the sensor, an updated footprint length for the tire; and sending, to the vehicle computing system and based at least on a determination that the updated footprint length matches the compensated footprint length, an instruction to cease modifying the pressure.

15 . The system of claim 14 , wherein the instruction to modify the pressure is an instruction to increase the tire pressure by adding gasses to the tire.

16 . The system of claim 10 , wherein the sensor calculates the tire pressure measurement by sampling the tire pressure periodically and determining an average tire pressure measurement for a tire pressure period.

17 . A non-transitory, computer-readable medium, comprising machine-readable instructions that, when executed by a processor of a computing device, cause the computing device to at least:
receive, from a sensor, a tire pressure measurement for a tire; receive, from the sensor, an uncompensated footprint length for the tire; calculate an inflation difference between the tire pressure measurement and a target tire pressure for the tire; calculate an inflation ratio by at least on finding a quotient of the inflation difference over the target tire pressure for the tire; determine a compensated footprint length based at least in part on the inflation ratio; and cause the tire to adjust the tire pressure to achieve the compensated footprint length.

18 . The non-transitory, computer-readable medium of claim 17 , wherein the machine-readable instructions that determine the compensated footprint length based at least in part on the inflation ratio further cause the computing device to at least:
calculate an inflation scale by summing inflation ratio and a fixed value; and calculate the compensated footprint length by taking product of the uncompensated footprint length with the inflation scale.

19 . The non-transitory, computer-readable medium of claim 17 , wherein the tire pressure measurement is a first tire pressure measurement and the machine-readable instructions that cause the tire to adjust the tire pressure to achieve the compensated footprint length further cause the computing device to at least:
send, to a pressure regulator, an instruction to modify the tire pressure; receive, from the sensor, an updated footprint length for the tire; and send, to the pressure regulator based at least on a determination that the updated footprint length matches the compensated footprint length, an instruction to cease modifying the pressure.

20 . The non-transitory, computer-readable medium of claim 17 , wherein the sensor calculates the tire pressure measurement by sampling the tire pressure periodically and determining an average tire pressure measurement for a tire pressure period.

Assignees

• Goodyear Tire & Rubber

Inventors

• Son Roman
• Singh Kanwar Bharat

Classifications

• B60C23/04

  mounted on the wheel or tyre · CPC title

• B60C23/064

  comprising tyre mounted deformation sensors, e.g. to determine road contact area · CPC title

• B60C23/001 Primary

  Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving · 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