# US 2026/0097748 A1 · Method for operating a brake system of a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0097748 A1 - Document ID: US20260097748A1 - Status: Published application - Kind: A1 - Application number: 19/338,077 - Filed: 2025-09-24 - Published: 2026-04-09 - Earliest claimed: 2024-10-04 - Assignees: Volvo Car Corporation - Applicants: Volvo Car Corporation - Inventors: Konstantinos Korkakakis; Staffan Johansson - Web page: https://patentgrep.com/patent/US20260097748A1 ## CPC - B60T 8/171: Detecting parameters used in the regulation; Measuring values used in the regulation - B60T 17/221: {Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems (hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M)} - B60T 1/10: by utilising wheel movement for accumulating energy, e.g. driving air compressors - B60T 13/662: {characterised by specified functions of the control system components} - B60T 17/22: Devices for monitoring or checking brake systems; Signal devices - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES ## Abstract A method for operating a brake system of a vehicle including at least one friction brake, the method including: obtaining brake operation data indicative of a brake pressure and/or a brake torque of the at least one friction brake from at least one brake operation of the at least one friction brake, obtaining deviation data indicative of a deviation of the brake pressure and/or the brake torque based on the brake operation data, obtaining state of corrosion data indicative of a state of corrosion of the at least one friction brake based on the deviation data, and providing a control instruction for the brake system, the control instruction being configured to control operation of the at least one friction brake based on the state of corrosion data. ## Claims ### Claim 1 A method for operating a brake system of a vehicle, the brake system comprising at least one friction brake, the method comprising: obtaining brake operation data indicative of a brake pressure and/or a brake torque of the at least one friction brake from at least one brake operation of the at least one friction brake; obtaining deviation data indicative of a deviation of the brake pressure and/or the brake torque based on the brake operation data; obtaining state of corrosion data indicative of a state of corrosion of the at least one friction brake based on the deviation data; and providing a control instruction for the brake system, the control instruction being configured to control operation of the at least one friction brake based on the state of corrosion data. ### Claim 2 (depends on 1) The method of claim 1, the control instruction being configured for varying the brake pressure per revolution of a friction disc of the at least one friction brake. ### Claim 3 (depends on 1) The method of claim 1, the control instruction being configured to control operation of the at least one friction brake and/or at least one regenerative brake of the brake system based on the state of corrosion data. ### Claim 4 (depends on 3) The method of claim 3, the control instruction specifying an operation time and/or a nominal brake torque for operating at least one of the at least one friction brake and/or the at least one regenerative brake for the at least one brake operation of the brake system. ### Claim 5 (depends on 1) The method of claim 1, the deviation data being indicative of the deviation of the brake pressure and/or the brake torque per revolution of a friction disc of the at least one friction brake. ### Claim 6 (depends on 5) The method of claim 5, the deviation data being indicative of an average deviation of the brake pressure and/or brake torque for multiple revolutions and/or multiple brake operations. ### Claim 7 (depends on 1) The method of claim 1, the control instruction specifying an operation time and/or a nominal brake torque for each one of at least two friction brakes of the brake system based on the state of corrosion data. ### Claim 8 (depends on 1) The method of claim 1, further comprising: comparing threshold data indicative of one or more of a number of drive cycles, a time, a brake torque, and a noise level from the at least one friction brake to at least one threshold, wherein the brake operation data, the deviation data and/or the state of corrosion data is obtained if the at least one threshold is met. ### Claim 9 (depends on 1) The method of claim 1, further comprising: operating the at least one friction brake based on the control instruction; repeating the obtaining of the brake operation data, the deviation data and the state of corrosion data after operating the at least one friction brake based on the control instruction; and providing an information indicative of a maintenance recommendation of the brake system based on the state of corrosion data. ### Claim 10 (depends on 1) The method of claim 1, the brake operation data being indicative of the brake pressure and/or the brake torque of the at least one friction brake from at least one normalized brake operation of the at least one friction brake, a nominal brake pressure for the at least one friction brake in the normalized brake operation being normalized over time based on a varying pressure on a brake pedal of the vehicle provided by a driver of the vehicle. ### Claim 11 (depends on 1) The method of claim 1, the state of corrosion data being obtained if the deviation of the brake pressure and/or the brake torque meets at least one threshold. ### Claim 12 A non-transitory computer readable medium comprising instructions stored in a memory and executed by a processor to carry out steps of a method for operating a brake system of a vehicle, the brake system comprising at least one friction brake, the method comprising: obtaining brake operation data indicative of a brake pressure and/or a brake torque of the at least one friction brake from at least one brake operation of the at least one friction brake; obtaining deviation data indicative of a deviation of the brake pressure and/or the brake torque based on the brake operation data; obtaining state of corrosion data indicative of a state of corrosion of the at least one friction brake based on the deviation data; and providing a control instruction for the brake system, the control instruction being configured to control operation of the at least one friction brake based on the state of corrosion data. ### Claim 13 (depends on 12) The non-transitory computer readable medium of claim 12, the method further comprising: comparing threshold data indicative of one or more of a number of drive cycles, a time, a brake torque, and a noise level from the at least one friction brake to at least one threshold, wherein the brake operation data, the deviation data and/or the state of corrosion data is obtained if the at least one threshold is met. ### Claim 14 (depends on 12) The non-transitory computer readable medium of claim 12, the method further comprising: operating the at least one friction brake based on the control instruction; repeating the obtaining of the brake operation data, the deviation data and the state of corrosion data after operating the at least one friction brake based on the control instruction; and providing an information indicative of a maintenance recommendation of the brake system based on the state of corrosion data. ### Claim 15 A vehicle comprising: brake system comprising at least one friction brake; a processor; and a memory storing instructions executed by the processor to carry out steps of a method for operating the brake system, the method comprising: obtaining brake operation data indicative of a brake pressure and/or a brake torque of the at least one friction brake from at least one brake operation of the at least one friction brake; obtaining deviation data indicative of a deviation of the brake pressure and/or the brake torque based on the brake operation data; obtaining state of corrosion data indicative of a state of corrosion of the at least one friction brake based on the deviation data; and providing a control instruction for the brake system, the control instruction being configured to control operation of the at least one friction brake based on the state of corrosion data. ### Claim 16 (depends on 15) The vehicle of claim 15, the method further comprising: comparing threshold data indicative of one or more of a number of drive cycles, a time, a brake torque, and a noise level from the at least one friction brake to at least one threshold, wherein the brake operation data, the deviation data and/or the state of corrosion data is obtained if the at least one threshold is met. ### Claim 17 (depends on 15) The vehicle of claim 15, the method further comprising: operating the at least one friction brake based on the control instruction; repeating the obtaining of the brake operation data, the deviation data and the state of corrosion data after operating the at least one friction brake based on the control instruction; and providing an information indicative of a maintenance recommendation of the brake system based on the state of corrosion data. ### Claim 18 (depends on 15) The vehicle of claim 15, the brake operation data being indicative of the brake pressure and/or the brake torque of the at least one friction brake from at least one normalized brake operation of the at least one friction brake, a nominal brake pressure for the at least one friction brake in the normalized brake operation being normalized over time based on a varying pressure on a brake pedal of the vehicle provided by a driver of the vehicle. ### Claim 19 (depends on 15) The vehicle of claim 15, the state of corrosion data being obtained if the deviation of the brake pressure and/or the brake torque meets at least one threshold.