LANE DEPARTURE STEERING CORRECTION WITH ROAD CAMBER AND CROSSWIND COMPENSATION

• US 20160096546A1
• Filed: 10/03/2014
• Published: 04/07/2016
• Est. Priority Date: 10/03/2014
• Status: Abandoned Application

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: Chia, Michael I.
• Application Number:
  US14/505,781
• Publication Number:
  US 20160096546A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60W 10/20 including control of steering systems
• CPC Class Codes: B60W 2420/403 Image sensing, e.g. optical camera
• CPC Class Codes: B60W 2420/42 Image sensing, e.g. optical camera
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/18 Steering angle
• CPC Class Codes: B60W 2552/20 Road profile, i.e. the change in elevation or curvature of a plurality of continuous road segments
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 2710/202 Steering torque
• CPC Class Codes: B60W 30/02 Control of vehicle driving stability
• CPC Class Codes: B60W 30/045 Improving turning performance
• CPC Class Codes: B60W 30/10 Path keeping cruise control for automatically following a preceding vehicle B60W30/165
• CPC Class Codes: B60W 30/12 Lane keeping
• CPC Class Codes: B60W 30/18145 Cornering
• CPC Class Codes: B62D 15/025 Active steering aids, e.g. helping the driver by actively influencing the steering system after environment evaluation B62D1/28 takes precedence
• CPC Class Codes: B62D 5/0466 for returning the steering wheel to neutral position
• CPC Class Codes: B62D 6/04 responsive only to forces disturbing the intended course of the vehicle, e.g. forces acting transversely to the direction of vehicle travel
• CPC Class Codes: B62D 6/08 responsive only to driver input torque

Abstract

A steering assist system configured to assist an operator to steer a vehicle includes a torque sensor, a location device, and a controller. The torque sensor is configured to output a torque signal indicative of a lateral force experienced by the vehicle. The location device is configured to determine a lateral position of the vehicle relative to a roadway. The controller configured to determine a steering correction to steer the vehicle toward a center of a roadway lane. The steering correction is based on the torque signal and the lateral position.

Claims

1. A steering assist system configured to assist an operator to steer a vehicle, said system comprising:

a torque sensor configured to output a torque signal indicative of a lateral force experienced by the vehicle;

a location device configured to determine a lateral position of the vehicle relative to a roadway; and

a controller configured to determine a steering correction to steer the vehicle toward a center of a roadway lane, wherein the steering correction is based on the torque signal and the lateral position.

2. The system in accordance with claim 1, wherein a baseline-correction-magnitude of the steering correction is increased when the steering correction is directed in opposition to the lateral force, and is decreased when the steering correction is directed in cooperation with the lateral force.

3. The system in accordance with claim 1, wherein the steering correction includes a dead-band based on the torque signal and the lateral position.

4. The system in accordance with claim 1, wherein the torque sensor is configured to determine a steering torque applied to a hand-wheel of the vehicle by an operator of the vehicle in opposition to the lateral force.

5. The system in accordance with claim 1, wherein the torque sensor is configured to determine a steering torque applied to a steering box of the vehicle by a steering actuator of the vehicle in opposition to the lateral force.

6. A method of assisting an operator to steer a vehicle, said method comprising:

receiving a torque signal from a torque sensor, wherein the torque signal is indicative of a lateral force experienced by the vehicle;

determining a lateral position of the vehicle relative to a roadway lane; and

determining a steering correction to steer the vehicle toward a center of the roadway lane, wherein the steering correction is based on the torque signal and the lateral position.

7. The method in accordance with claim 6, wherein the step of determining the steering correction includes

increasing a baseline-correction-magnitude when the steering correction is directed in opposition to the lateral force;

and

decreasing the baseline-correction-magnitude when the steering correction is directed in cooperation with the lateral force.