# US 9,517,793 B2 · Method of preventing over stroke in rear-wheel steering system and linear sensor applied thereto > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,793 B2 - Document ID: US9517793B2 - Status: Granted - Kind: B2 - Application number: 14/740,935 - Filed: 2015-06-16 - Published: 2015-12-24 - Granted: 2016-12-13 - Earliest claimed: 2014-06-18 - Assignees: Mando Corporation - Applicants: Mando Corporation - Inventors: Gyung Hun Sim - Web page: https://patentgrep.com/patent/US9517793B2 ## CPC - B62D 7/1581: {characterised by comprising an electrical interconnecting system between the steering control means of the different axles} - B62D 5/0469: {End-of-stroke control} - G01D 5/145: {influenced by the relative movement between the Hall device and magnetic fields (see G01R33/06)} - 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) - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR ## Abstract The present invention relates to a method of preventing over stroke in a rear-wheel steering system for a vehicle, and more particularly, to a method of preventing the over stroke of a lead screw using a linear sensor moving together with the lead screw in a rear-wheel steering system. In detail, there is provided a method of preventing over stroke in a rear-wheel steering system, including determining whether a linear sensor which moves in conjunction with a lead screw enters preliminary sections A of a stroke section a and restricting the movement of the lead screw when the linear sensor enters the preliminary sections A. ## Claims ### Claim 1 A method of preventing over stroke in a rear-wheel steering system, comprising: determining whether a linear sensor which moves in conjunction with a lead screw enters preliminary sections A of a stroke section a; and restricting the movement of the lead screw when the linear sensor enters the preliminary sections A. ### Claim 2 A method of preventing over stroke in a rear-wheel steering system, comprising: determining whether a linear sensor which moves in conjunction with a lead screw enters preliminary sections A of a stroke section a; restricting the movement of the lead screw when the linear sensor enters the preliminary sections A determining whether the linear sensor moves beyond the preliminary sections A and enters over stroke sections b and c; and switching a moving direction of the lead screw when the linear sensor enters the over stroke sections b and c. ### Claim 3 (depends on 2) The method of claim 2, wherein the linear sensor has a first sensor output and a second sensor output, and wherein a controller uses a difference between the first sensor output and the second sensor output in the determining of entry. ### Claim 4 (depends on 1) The method of claim 1, wherein a controller, in the restricting of the movement, reduces a speed of a motor connected to the lead screw. ### Claim 5 (depends on 1) The method of claim 1, wherein a controller, in the restricting of the movement, reduces current supplied to a motor connected to the lead screw. ### Claim 6 (depends on 2) The method of claim 2, wherein a controller, in the switching of the moving direction, changes a polarity of current supplied to a motor connected to the lead screw. ### Claim 7 A linear sensor comprising: a housing comprising an accommodation space therein; a mobile member which is provided in the accommodation space, at least a part thereof extending outside the housing and connected to a mounting unit, interworks with a lead screw, and moves left and right in a stroke section a; a magnet member provided in the mobile member and configured to generate a magnetic force; and an output unit configured to sense a position of the magnet member and to generate a first sensor output and a second sensor output. ### Claim 8 (depends on 7) The linear sensor of claim 7, wherein when the mobile member enters preliminary sections A in the stroke section a, the movement of the lead screw is restricted. ### Claim 9 (depends on 8) The linear sensor of claim 8, wherein when the mobile member moves beyond the preliminary sections A and enters over stroke sections b and c, a moving direction of the lead screw is switched. ### Claim 10 (depends on 7) The linear sensor of claim 7, wherein a position of the mobile member 120 is sensed based on a difference between the first sensor output and the second sensor output.