# US 11,440,577 B2 · Steering system, abnormality determination method, and non-transitory storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,577 B2 - Document ID: US11440577B2 - Status: Granted - Kind: B2 - Application number: 17/356,706 - Filed: 2021-06-24 - Published: 2021-12-30 - Granted: 2022-09-13 - Earliest claimed: 2020-06-25 - Assignees: Jtekt Corporation - Applicants: Jtekt Corporation - Inventors: Syouma Edamoto; Takeshi Watanabe; So Saito - Web page: https://patentgrep.com/patent/US11440577B2 ## CPC - B62D 1/187: with tilt adjustment; with tilt and axial adjustment (B62D1/183, B62D1/19 takes precedence) - B62D 1/181: with power actuated adjustment, e.g. with position memory - B62D 1/183: adjustable between in-use and out-of-use positions, e.g. to improve access - 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 steering system includes a first operation device including a first displacement mechanism, a first electric drive source, and a first detector, a second operation device including a second displacement mechanism, a second electric drive source, and a second detector, and a determiner configured to determine that the first operation device and the second operation device do not malfunction when the determiner determines that the first operation device has an abnormality based on first operation information related to operation of the first operation device, and that the second operation device has an abnormality based on second operation information related to operation of the second operation device. ## Claims ### Claim 1 A steering system comprising: a first operation device including a first displacement mechanism configured to change a position of an operation member to be operated by a driver, a first electric drive source configured to operate the first displacement mechanism, and a first detector configured to detect first positional information indicating the position of the operation member based on the first displacement mechanism; a second operation device including a second displacement mechanism different from the first displacement mechanism, a second electric drive source configured to operate the second displacement mechanism, and a second detector configured to detect second positional information indicating the position of the operation member based on the second displacement mechanism; and a determiner configured to determine that the first operation device and the second operation device do not malfunction when the determiner determines that the first operation device has an abnormality based on first operation information related to operation of the first operation device, and that the second operation device has an abnormality based on second operation information related to operation of the second operation device. ### Claim 2 (depends on 1) The steering system according to claim 1, wherein: the first displacement mechanism is an advancing and retreating mechanism configured to advance or retreat the operation member relative to the driver; and the second displacement mechanism is a tilting mechanism configured to move the operation member upward and downward. ### Claim 3 (depends on 1) The steering system according to claim 1, wherein the determiner is configured to determine that the first operation device has the abnormality when the first positional information contained in the first operation information indicates an abnormal operation that is not a predetermined normal operation. ### Claim 4 (depends on 1) The steering system according to claim 1, wherein the determiner is configured to determine that the first detector has an abnormality when the first positional information falls within a predetermined range continuously for a predetermined period and first drive information for operating the first electric drive source in the first operation information does not indicate an abnormality. ### Claim 5 (depends on 4) The steering system according to claim 4, wherein the determiner is configured to determine that the first detector malfunctions when a difference between an instructive current value and an actual current value contained in the first drive information is equal to or larger than a second threshold. ### Claim 6 (depends on 1) The steering system according to claim 1, wherein the determiner is configured to determine that the first displacement mechanism malfunctions when first drive information for operating the first electric drive source in the first operation information exceeds an electric power threshold. ### Claim 7 (depends on 1) The steering system according to claim 1, wherein the determiner is configured to determine that the operation of the first operation device has an abnormality when first drive information for operating the first electric drive source in the first operation information exceeds a first threshold. ### Claim 8 (depends on 1) The steering system according to claim 1, further comprising an operation controller configured to cause the second operation device to perform a predetermined operation to make, by the determiner, determination as to whether the operation of the first operation device has an abnormality. ### Claim 9 An abnormality determination method for a steering system, the steering system including: a first operation device including a first displacement mechanism configured to change a position of an operation member to be operated by a driver, a first electric drive source configured to operate the first displacement mechanism, and a first detector configured to detect first positional information indicating the position of the operation member based on the first displacement mechanism; a second operation device including a second displacement mechanism different from the first displacement mechanism, a second electric drive source configured to operate the second displacement mechanism, and a second detector configured to detect second positional information indicating the position of the operation member based on the second displacement mechanism; and a determiner, the abnormality determination method comprising determining, by the determiner, that the first operation device and the second operation device do not malfunction when the determiner determines that the first operation device has an abnormality based on first operation information related to operation of the first operation device, and that the second operation device has an abnormality based on second operation information related to operation of the second operation device. ### Claim 10 (depends on 9) The abnormality determination method according to claim 9, further comprising causing, by an operation controller, the second operation device to perform a predetermined operation when the determiner determines that the operation of the first operation device has an abnormality. ### Claim 11 A non-transitory storage medium storing instructions that are executable by one or more processors and that cause the one or more processors to perform functions comprising determining that a first operation device and a second operation device do not malfunction when determination is made that the first operation device has an abnormality based on first operation information related to operation of the first operation device, and that the second operation device has an abnormality based on second operation information related to operation of the second operation device, the first operation device including: a first displacement mechanism configured to change a position of an operation member to be operated by a driver; a first electric drive source configured to operate the first displacement mechanism; and a first detector configured to detect first positional information indicating the position of the operation member based on the first displacement mechanism, the second operation device including: a second displacement mechanism different from the first displacement mechanism; a second electric drive source configured to operate the second displacement mechanism; and a second detector configured to detect second positional information indicating the position of the operation member based on the second displacement mechanism.