Lane Keep Controller Logic for Unintended Cancellation During Lane Change
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Solution Overview
Problem
Existing vehicle travel assistance systems often cancel lane keep control unintentionally when a driver attempts to change lanes, contradicting the driver's intention and disrupting continuous lane keep control.
Innovation Solution
A travel control device with a surrounding detection unit, intention detection unit, lane keep controller, and lane change controller that continues lane keep control if lane change is unavailable, allowing drivers to change lanes while maintaining lane keep assistance, and adjusts cancellation criteria based on obstacle proximity and driver intent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lane change control is invalidated when another vehicle is present at the rear lateral side during lane keep control, then the safety is improved, but the lane keep control is canceled contrarily to the driver's intention
Solution Approach 1:
The patent applies dynamics by making the control system adaptable based on detected driver intention. When a lane change intention is detected via winker operation, the system dynamically switches from automatic lane change control to manual lane keep control, allowing the driver to override the system's safety restriction and proceed with the lane change manually if desired.
Solution Approach 2:
The system uses feedback from the winker operation detection to adjust its control behavior. By monitoring the driver's lane change intention through the winker signal, the system provides feedback by either executing automatic lane change control when safe or maintaining lane keep control when unsafe, creating a closed-loop response that respects driver intent while ensuring safety.
2Adaptability or versatility
If the lane change control is executed when the lane is clear, then the lane change capability is improved, but the continuous lane keep control is disrupted when the driver wants to maintain lane keep control
Solution Approach 1:
The system dynamically adjusts its control mode based on real-time detection of driver intention through winker operation. When lane change is requested and the path is clear, the system transitions to lane change control; when lane change is requested but the path is occupied, it maintains lane keep control. This dynamic adaptation allows seamless switching between control modes to satisfy both lane change capability and continuous lane keep control requirements.
3Reliability
If the system cancels lane keep control when lane change is blocked, then the safety is improved, but the driver's intention to continue lane keep control is not met
Solution Approach 1:
The system continuously monitors the winker operation status and surrounding environment to provide feedback-driven control adjustments. When the driver operates the winker during lane keep control and the system detects another vehicle blocking the lane change path, it provides feedback by maintaining lane keep control rather than canceling it, thereby preserving travel assistance continuity while ensuring safety through ongoing environmental monitoring.
Data Source
AI summary
A lane change controller determines whether lane change is available or unavailable on the basis of a detection result of an obstacle by a radar and an obstacle recognizer in response to detection of a winker operation by an operation detection unit. A lane keep controller continues lane keep control if the operation detection unit detects the winker operation during the lane keep control and if the lane change controller determines that the lane change is unavailable.