# US 2025/0153518 A1 · Compensating footprint length for inflation pressure changes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0153518 A1 - Document ID: US20250153518A1 - Status: Published application - Kind: A1 - Application number: 18/883,225 - Filed: 2024-09-12 - Published: 2025-05-15 - Earliest claimed: 2023-11-13 - Assignees: The Goodyear Tire & Rubber Company - Applicants: The Goodyear Tire & Rubber Company - Inventors: Roman Son; Kanwar Bharat Singh - Web page: https://patentgrep.com/patent/US20250153518A1 ## CPC - B60C 23/001: {Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving} - B60C 23/0474: {Measurement control, e.g. setting measurement rate or calibrating of sensors; Further processing of measured values, e.g. filtering, compensating or slope monitoring} - B60C 23/04: mounted on the wheel or tyre - B60C 23/064: {comprising tyre mounted deformation sensors, e.g. to determine road contact area} - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES ## 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) The method of claim 1, wherein the inflation ratio is further calculated by multiplying the quotient by a sensor compensation value. ### Claim 4 (depends on 3) The method of claim 3, further comprising determining the sensor compensation value based at least on a calibration of the sensor. ### Claim 5 (depends on 1) 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. ### Claim 6 (depends on 5) 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. ### Claim 7 (depends on 5) 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. ### Claim 8 (depends on 1) 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. ### Claim 9 (depends on 1) The method of claim 1, wherein the tire pressure measurement is an instantaneous measurement of the tire pressure at a specified point in time. ### Claim 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. ### Claim 11 (depends on 10) 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. ### Claim 12 (depends on 10) The system of claim 10, wherein the inflation ratio is further calculated by multiplying the quotient by a sensor compensation value. ### Claim 13 (depends on 12) 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. ### Claim 14 (depends on 10) 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. ### Claim 15 (depends on 14) 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. ### Claim 16 (depends on 10) 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. ### Claim 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. ### Claim 18 (depends on 17) 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. ### Claim 19 (depends on 17) 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. ### Claim 20 (depends on 17) 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.