# US 10,246,121 B2 · Vehicle steering device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,246,121 B2
- Document ID: US10246121B2
- Status: Granted
- Kind: B2
- Application number: 15/604,967
- Filed: 2017-05-25
- Published: 2017-11-30
- Granted: 2019-04-02
- Earliest claimed: 2016-05-27
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co., Ltd.
- Inventors: Manabu Ikegaya; Kenichi Kirihara; Yoshito Nakamura
- Web page: https://patentgrep.com/patent/US10246121B2

## CPC

- B62D 5/003: {Backup systems, e.g. for manual steering (B62D5/30 takes precedence)}
- B62D 5/001: {Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup}
- B62D 6/002: {computing target steering angles for front or rear wheels (B62D7/159 takes precedence)}
- B62D 6/02: responsive only to vehicle speed
- B62D 5/04: electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- 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 vehicle steering device includes: steering reaction force generation device having a steering wheel and a steering reaction force motor; steering reaction force motor resolver for detecting steering angle; turning device having a steering motor and capable of turning steered wheels, in a state being mechanically disconnected from the steering reaction force generation device; steering motor resolver for detecting turning angle; drive control section for performing drive control of the steering motor; and vehicle speed sensor for detecting the vehicle speed of vehicle. The drive control section performs drive control of the steering motor if vehicle speed exceeds vehicle speed threshold for the first time after ignition switch is turned on and if specific phase shift based on type and magnitude of phase shift occurs.

## Claims

### Claim 1

A vehicle steering device, comprising:
a steering section having a steering member operated in turning steered wheels of a vehicle;
a steering angle detection section for detecting a steering angle of the steering member;
a turning section having a turning actuator for applying a turning force for turning the steered wheels and being capable of turning the steered wheels in a state that the turning section is mechanically disconnected from the steering section;
a turning angle detection section for detecting a turning angle of the steered wheels;
a control section for performing drive control of the turning actuator; and
a vehicle speed detection section for detecting vehicle speed of the vehicle,
wherein if the vehicle speed exceeds a predetermined vehicle speed threshold for the first time after an ignition switch is turned on and if a specific phase shift related to correspondence relationship between the steering angle and the turning angle occurs, the control section performs drive control of the turning actuator to thereby correct the turning angle of the steered wheels such that the turning angle of the steered wheels matches the steering angle of the steering wheel.

### Claim 2 (depends on 1)

The vehicle steering device according to claim 1,
wherein the specific phase shift is a phase shift at a time when the correspondence relationship between the steering angle and the turning angle is an inverse phase shift.

### Claim 3 (depends on 1)

The vehicle steering device according to claim 1,
wherein the specific phase shift is a phase shift in a state that the steered wheels face towards a right turning direction or a left turning direction despite that the steering member is in a neutral position.

### Claim 4 (depends on 1)

The vehicle steering device according to claim 1,
wherein the specific phase shift is a phase shift in a state that the steered wheels face towards a straight-ahead direction despite that the steering member is in either a right turning position or a left turning position.