# US 2023/0055032 A1 · Method for controlling a power steering system making it possible to limit a physical supply current supplied to a power steering motor in the event of a mechanical impact between a rack and a mechanical end stop > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0055032 A1 - Document ID: US20230055032A1 - Status: Published application - Kind: A1 - Application number: 17/797,571 - Filed: 2021-02-03 - Published: 2023-02-23 - Earliest claimed: 2020-02-04 - Assignees: Jtekt Europe - Applicants: Jtekt Europe - Inventors: Arnaud BOUCHET; Ghislain PONCET - Web page: https://patentgrep.com/patent/US20230055032A1 ## CPC - B62D 5/0469: {End-of-stroke control} - B62D 5/0463: {calculating assisting torque from the motor based on driver input} - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) ## Abstract A method for controlling a power steering system of a vehicle which is intended to limit the physical supply current supplied to the at least one power steering motor in the event of an impact between at least one rack and at least one mechanical end stop, the control method including: —a determination step wherein the power steering computer determines a setpoint torque for the power steering motor; —a driving step wherein the power steering computer determines the setpoint supply current for the power steering motor; wherein the control method also includes: —a detection step wherein the power steering computer detects an impact between rack and mechanical end stop; —a protection step emitting a protected signal to the driving step when an impact is detected, so that the setpoint supply current determined by the driving step is below a maximum setpoint supply current. ## Claims ### Claim 1 A method for controlling a power steering system of a vehicle comprising at least one steering computer computer, at least one steering wheel, at least one assist motor consuming a physical supply current and exerting a motor torque on at least one rack, a movement of the at least one rack being limited by at least one mechanical stop, said method being intended to limit the physical supply current of the at least one assist motor upon an impact between the at least one rack and the at least one mechanical stop, said control method comprising: a determination step in which the at least one steering computer computer determines a setpoint torque of the at least one assist motor; a drive step in which the at least one steering computer determines the setpoint supply current of the at least one assist motor; wherein the control method also comprises: a detection step in which the at least one steering computer detects an impact between the at least one rack and the at least one mechanical stop; a protection step emitting a protected signal to the drive step when an impact is detected, so that the setpoint supply current determined by the drive step is less than a maximum setpoint supply current. ### Claim 2 (depends on 1) The control method according to claim 1, wherein the protected signal corresponds to a limited setpoint torque. ### Claim 3 (depends on 1) The control method according to claim 1, wherein the protected signal corresponds to at least one control parameter of the drive step. ### Claim 4 (depends on 1) The control method according to claim 1, wherein the detection step emits an impact signal when an impact is detected. ### Claim 5 (depends on 4) The control method according to claim 4, wherein the protected signal depends on the impact signal. ### Claim 6 (depends on 4) The control method according to claim 4, comprising a timing step receiving the impact signal and emitting an application signal to the protection step. ### Claim 7 (depends on 6) The control method according to claim 6, wherein the timing step comprises an application time corresponding to a period during which the protected signal is emitted after the detection of an impact. ### Claim 8 (depends on 6) The control method according to claim 6, wherein the timing step comprises an exclusion time corresponding to a period during which the protected signal cannot be emitted after the detection of an impact. ### Claim 9 (depends on 1) The control method according to claim 1, wherein the detection step detects an impact by means of an acceleration of the assist motor. ### Claim 10 (depends on 1) A power steering system of a vehicle allowing implementing a control method according to claim 1.