# US 8,751,129 B2 · Electronic brake system controls adaptation based upon brake component condition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,751,129 B2 - Document ID: US8751129B2 - Status: Granted - Kind: B2 - Application number: 13/314,510 - Filed: 2011-12-08 - Published: 2013-06-13 - Granted: 2014-06-10 - Earliest claimed: 2011-12-08 - Assignees: Continental Automotive Systems, Inc. - Applicants: Andrew Szymanski; Vesa Luomaranta - Inventors: Andrew Szymanski; Vesa Luomaranta - Web page: https://patentgrep.com/patent/US8751129B2 ## CPC - B60T 13/146: {Part of the system directly actuated by booster pressure} - B60T 13/662: {characterised by specified functions of the control system components} - B60T 13/686: {in hydraulic systems or parts thereof} - 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 of operating a brake system comprises determining a predicted braking effectiveness for a plurality of vehicle braking operations and determining an actual braking effectiveness for the plurality of vehicle braking operations. The predicted braking effectiveness is compared to the actual braking effectiveness. An adjustment factor for the brake system is determined based upon the comparison and the brake system response is adjusted based on the determined adjustment factor. ## Claims ### Claim 1 A method of operating a brake system comprising: determining a predicted braking effectiveness by comparing an original braking pressure and a predicted vehicle deceleration for a plurality of vehicle braking operations, wherein the predicted braking effectiveness is based upon an initial predicted braking effectiveness value in the electronic control unit, and wherein the initial predicated brake effectiveness is applied at an initial brake operation following assembly of the vehicle; determining an actual braking effectiveness by comparing the original braking pressure and an actual vehicle deceleration for the plurality of vehicle braking operations; comparing the predicted braking effectiveness to the actual braking effectiveness; determining an adjustment factor for the brake system based upon the comparison, wherein the adjustment factor is dependent on the original braking pressure, and wherein the adjustment factor is initially based upon a predicted decreased brake effectiveness due to a coating applied to at least one of the brakes; and adjusting the brake system response based on the determined adjustment factor. ### Claim 2 (depends on 1) The method of claim 1, wherein the adjusting the brake system response further comprises increasing the braking pressure to a modified braking pressure. ### Claim 3 (depends on 2) The method of claim 2, wherein the adjustment factor for the brake system is the braking pressure required to increase the actual vehicle deceleration to the predicted vehicle deceleration. ### Claim 4 (depends on 2) The method of claim 2, wherein the original braking pressure for the brake system is the braking pressure at a given time prior to adjusting the brake system by the adjustment factor and the modified braking pressure may be an actual braking pressure at a given time after application of the adjustment factor. ### Claim 5 A method of operating a brake system comprising: determining a predicted braking effectiveness for a plurality of vehicle braking operations where active braking interventions are not applied, wherein the predicted braking effectiveness is based upon an initial predicted braking effectiveness value in the electronic control unit, wherein the initial predicated brake effectiveness is applied at an initial brake operation following assembly of the vehicle; determining an actual braking effectiveness for the plurality of vehicle braking operations; comparing the predicted braking effectiveness to the actual braking effectiveness; determining an adjustment factor for the brake system based upon the comparison, wherein the adjustment factor is dependent on the original braking pressure, and wherein the adjustment factor is initially based upon a predicted decreased brake effectiveness due to a coating applied to at least one of the brakes; and adjusting the brake system response based on the determined adjustment factor. ### Claim 6 (depends on 5) The method of claim 5, wherein determining the predicted braking effectiveness further comprises comparing an original braking pressure and a predicted vehicle deceleration for the plurality of vehicle braking operations and determining an actual braking effectiveness by comparing the original braking pressure and an actual vehicle deceleration for the plurality of vehicle braking operations. ### Claim 7 (depends on 5) The method of claim 5, wherein the adjusting the brake system response further comprises increasing the braking pressure to a modified braking pressure. ### Claim 8 (depends on 6) The method of claim 6, wherein the adjustment factor for the brake system is the braking pressure required to increase the actual vehicle deceleration to the predicted vehicle deceleration. ### Claim 9 (depends on 6) The method of claim 6, wherein the original braking pressure for the brake system is the braking pressure at a given time prior to adjusting the brake system by the adjustment factor and the modified braking pressure may be an actual braking pressure at a given time after application of the adjustment factor. ### Claim 10 (depends on 5) The method of claim 5, wherein determining the predicted braking effectiveness further comprises comparing a predicted vehicle stopping distance for the plurality of vehicle braking operations to an actual vehicle stopping distance. ### Claim 11 (depends on 1) The method of claim 1, wherein the adjustment factor increases as the original brake pressure increases. ### Claim 12 (depends on 1) The method of claim 1, wherein comparing the predicted braking effectiveness to the actual braking effectiveness further comprises adjusting the comparison to account for sudden shifts in difference from a previous comparison of the predicted braking effectiveness to the actual braking effectiveness and performing the comparison only when active braking interventions are not applied. ### Claim 13 (depends on 5) The method of claim 5, wherein the adjustment factor increases as the original brake pressure increases. ### Claim 14 (depends on 5) The method of claim 5, wherein comparing the predicted braking effectiveness to the actual braking effectiveness further comprises adjusting the comparison to account for sudden shifts in difference from a previous comparison of the predicted braking effectiveness to the actual braking effectiveness.