Lane-Width Adaptive Steering Assist for Road-Edge Control
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Solution Overview
Problem
Lane keep assist systems in vehicles often intervene unnecessarily, reducing user comfort by applying steering interventions in scenarios where the driver intentionally brings the vehicle close to or crosses the road edge, as they cannot be easily disabled and follow default activation settings.
Innovation Solution
A control system that generates road edge assist steering torque based on lane width comparisons, using sensors and mapping data to determine when the vehicle approaches a road edge, and applies a power assist steering torque to prevent unintended crossing, with optional override by the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lane keep assist systems are activated by default to prevent unintended lane crossings, then safety is improved, but user comfort deteriorates due to unnecessary steering interventions in scenarios where drivers intentionally approach road edges
Solution Approach 1:
The system changes the parameter of lane width detection thresholds to distinguish between narrow and wide lanes. By detecting the actual lane width and comparing it against predefined thresholds, the system adapts its intervention behavior - providing road edge assist in wide lanes while suppressing interventions in narrow lanes where intentional road edge approaches are more likely, thus resolving the contradiction between safety and user comfort
Solution Approach 2:
The system dynamically adjusts its intervention strategy based on real-time lane width detection. Rather than using a fixed intervention policy, the system modifies its behavior adaptively - enabling road edge assist when lane width exceeds thresholds and disabling it when lane width falls below thresholds, allowing the system to respond appropriately to different driving scenarios and maintain both safety and user comfort
2Reliability
If road edge assist steering torque is applied to prevent unintended road edge crossing, then vehicle control safety is improved, but driver maneuverability deteriorates when drivers need to intentionally approach or cross road edges in narrow lanes
Solution Approach 1:
The system changes the operational parameters of the road edge assist based on detected lane width. By using lane width thresholds as decision criteria, the system enables road edge assist in wide lanes where unintended crossing is more likely, while disabling it in narrow lanes where drivers may need intentional road edge approaches for passing maneuvers, thus maintaining both safety and driver maneuverability
Solution Approach 2:
The system uses feedback from lane width detection to control the road edge assist function. The detected lane width is fed back to the control system, which then adjusts the assist torque application accordingly - providing feedback-based adaptive control that ensures safety in appropriate scenarios while allowing driver intent in scenarios where narrow lanes are detected
Data Source
AI summary
Aspects of the present invention relate to a control system for controlling generation of a road edge assist steering torque at a steering wheel of a host vehicle. The control system includes one or more controllers. The control system is configured to determine a first width representing a width of a first lane of travel. The determined first width is compared to a predefined first threshold. The control system is configured to control generation of the road edge assist steering torque in dependence on the comparison of the first width and the first threshold. Aspects of the present invention also relate to a vehicle having a control system; and a method of controlling generation of a road edge assist steering torque.