# US 2021/0276523 A1 · Method for controlling the braking power in an electrohydraulic braking system of a motor vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0276523 A1 - Document ID: US20210276523A1 - Status: Published application - Kind: A1 - Application number: 17/257,746 - Filed: 2019-06-27 - Published: 2021-09-09 - Earliest claimed: 2018-07-04 - Assignees: Volkswagen Aktiengesellschaft - Applicants: Volkswagen Aktiengesellschaft - Inventors: Frank STEBNER; Tobias WAGNER; Matthias KÖRNER - Web page: https://patentgrep.com/patent/US20210276523A1 ## CPC - B60T 13/686: {in hydraulic systems or parts thereof} - B60T 17/222: {by filling or bleeding of hydraulic systems} - B60T 8/1766: Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle - B60T 8/326: {Hydraulic systems} - B60T 8/4872: {pump-back systems} - B60T 13/683: {in pneumatic systems or parts thereof (in vacuum systems B60T13/72)} - 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 2201/12: Pre-actuation of braking systems without significant braking effect; Optimizing brake performance by reduction of play between brake pads and brake disc - B60T 2270/406: Test-mode; Self-diagnosis - 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 controlling the braking power in an electrohydraulic braking system of a transportation vehicle which includes initiating a braking process; detecting a current state of the electrohydraulic braking system; increasing the braking pressure based on the current state of the electrohydraulic braking system, wherein braking pressure is built up more rapidly by targeted, staggered supply of braking pressure to individual parts of the braking system. ## Claims ### Claim 1 A method for controlling the braking force in an electrohydraulic brake system of a transportation vehicle, the method comprising the steps: commencing a braking operation detecting a present state of the electrohydraulic brake system; and increasing the brake pressure based on the present state of the electrohydraulic brake system; wherein a faster brake pressure build-up is performed by a targeted, temporally mutually separate supply of brake pressure to individual parts of the brake system. ### Claim 2 (depends on 1) The method of claim 1, wherein the commencement of a braking operation is initiated by the actuation of a brake pedal. ### Claim 3 (depends on 1) The method of claim 1, characterized wherein the detection of a present state of the electrohydraulic brake system is performed based on the present state of the brake fluid used in the brake system. ### Claim 4 (depends on 1) The method of claim 1, wherein the increase of the brake pressure based on the present state of the electrohydraulic brake system is performed by the opening and closing of centrally controlled electric valves. ### Claim 5 (depends on 1) The method of claim 1, wherein the targeted, temporally mutually separate supply of brake pressure to individual parts of the brake system is performed alternatively. ### Claim 6 (depends on 1) The method of claim 1, wherein brake pressure is supplied to the front axle and the rear axle of the transportation vehicle in temporarily and mutually separately during the increase of the brake pressure. ### Claim 7 (depends on 1) The method of claim 1, wherein, upon commencement of the method, brake pressure is supplied initially only to the rear axle, whereas the front axle remains separate from the braking compressed air supply. ### Claim 8 (depends on 1) The method of claim 1, wherein the lengths of the time intervals in which brake pressure is supplied to individual parts of the brake system vary dependently on the respective parts of the brake system. ### Claim 9 An electrohydraulic brake system, comprising: an actuator for commencing a braking operation; a detection unit for detecting a present state of the electrohydraulic brake system; a closed-loop pressure control unit for increasing the brake pressure based on the present state of the electrohydraulic brake system; and a control unit for the targeted distribution of the brake pressure wherein the control unit is configured such that a faster brake pressure build-up is performed by a targeted, temporally mutually separate supply of brake pressure to individual parts of the brake system. ### Claim 10 (depends on 9) The electrohydraulic brake system of claim 9, wherein the brake system comprises at least two mutually separately arranged detection units for detecting a present state of the electrohydraulic brake system. ### Claim 11 (depends on 9) A transportation vehicle comprising the electrohydraulic brake system of claim 9. ### Claim 12 (depends on 11) The transportation vehicle of claim 11, wherein the brake system comprises at least two mutually separately arranged detection units for detecting a present state of the electrohydraulic brake system. ### Claim 13 (depends on 9) The brake system of claim 9, wherein the commencement of a braking operation is initiated by the actuation of a brake pedal. ### Claim 14 (depends on 9) The brake system of claim 9, wherein the detection of a present state of the electrohydraulic brake system is performed based on the present state of the brake fluid used in the brake system. ### Claim 15 (depends on 9) The brake system of claim 9, wherein the increase of the brake pressure based on the present state of the electrohydraulic brake system is performed by the opening and closing of centrally controlled electric valves. ### Claim 16 (depends on 9) The brake system of claim 9, wherein the targeted, temporally mutually separate supply of brake pressure to individual parts of the brake system is performed alternatively. ### Claim 17 (depends on 9) The brake system of claim 9, wherein brake pressure is supplied to the front axle and the rear axle of the transportation vehicle in temporarily and mutually separately during the increase of the brake pressure. ### Claim 18 (depends on 9) The brake system of claim 9, wherein brake pressure is supplied initially only to the rear axle, whereas the front axle remains separate from the braking compressed air supply. ### Claim 19 (depends on 9) The method of claim 9, wherein the lengths of the time intervals in which brake pressure is supplied to individual parts of the brake system vary dependently on the respective parts of the brake system.