# US 7,610,134 B2 · Vehicle steering system

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- Number: US 7,610,134 B2
- Document ID: US7610134B2
- Status: Granted
- Kind: B2
- Application number: 11/760,402
- Filed: 2007-06-08
- Published: 2007-12-13
- Granted: 2009-10-27
- Earliest claimed: 2006-06-13
- Assignees: Jtekt Corporation
- Inventors: Shingo Maeda; Masanori Arima; Naoki Maeda; Kosuke Yamanaka; Atsushi Ishihara; Tatsuma Kouchi; Daisuke Maeda
- Web page: https://patentgrep.com/patent/US7610134B2

## CPC

- B62D 15/0285: {Parking performed automatically}
- B60T 2201/10: Automatic or semi-automatic parking aid systems
- 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)
- 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 brake application speed is compared with a speed threshold value so as to judge whether or not a braking operation being performed is an emergency braking operation. If not the emergency braking operation, an automatic parking mode is held. When the emergency braking operation is in effect, control information related to a state of an automatic parking control then is stored in a control information storage section, and the automatic parking control is cancelled. Thereafter, when a steering operation or a gearshift operation is performed before a cancellation of application of the brake is detected, the process is ended, and the control mode is held in an assist mode. When the application of the brake is cancelled with neither the steering operation nor the gearshift operation performed, the control information is read in so as to resume the automatic parking control.

## Claims

### Claim 1

A vehicle steering system comprising:
a steering actuator configured to impart a steering force to a steering mechanism of a vehicle;
an automatic steering controller configured to perform automatic steering control by controlling the steering actuator;
a manipulation urgency detector configured to detect a degree of manipulation urgency of a vehicle brake application member which is manipulated by the driver;
an automatic steering cancellation controller configured to cancel the automatic steering control by the automatic steering controller when the degree of manipulation urgency detected by the manipulation urgency detector exceeds a predetermined threshold value;
a control resumption data storage configured to store control resumption data for resumption of the automatic steering control when the automatic steering control cancellation controller cancels the automatic steering control; and
an automatic steering resuming unit configured to resume the automatic steering control by the automatic steering controller using the control resumption data stored in the control resumption data storage when a predetermined control resuming condition is established,
wherein the automatic steering resuming unit includes
means for determining the cancellation of braking after the automatic steering control has been cancelled by the automatic steering cancellation controller,
means for determining a steering operation after the automatic steering control has been cancelled by the automatic steering cancellation controller,
means for determining a gearshift operation by the driver after the automatic steering control has been cancelled by the automatic steering cancellation controller, and
means for resuming the automatic steering control by the automatic steering controller after the automatic steering control has been cancelled by the automatic steering cancellation controller when the means for determining the cancellation of braking after the automatic steering control has been cancelled by the automatic steering cancellation controller determines that a braking application has been cancelled, the means for determining a steering operation after the automatic steering control has been cancelled by the automatic steering cancellation controller makes a determination of no steering operation, and the means for determining a gearshift operation by the driver after the automatic steering control has been cancelled by the automatic steering cancellation controller makes a determination of no gearshift operation.

### Claim 2 (depends on 1)

The vehicle steering system according to claim 1, wherein the manipulation urgency detector includes a manipulation speed detector for detecting a manipulation speed of the brake application member.

### Claim 3 (depends on 1)

The vehicle steering system according to claim 1, wherein the manipulation urgency detector includes a manipulation force detector for detecting a manipulation force of the brake application member.