Vehicle Driving Control Emergency Evacuation Stability
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Solution Overview
Problem
When a driver fails to take over in partially automated in-lane or lane change systems due to conditions like dozing off or distraction, existing systems may cause unstable vehicle behavior or sudden proximity to following vehicles due to abrupt deceleration during emergency evacuation maneuvers.
Innovation Solution
A driving control apparatus that includes an environmental condition estimator, path generator, and vehicle controller, which maintains set vehicle speed and inter-vehicle distance, notifies the driver of a takeover request, and performs automated lane changes to evacuate the vehicle to a road shoulder, with adjusted lane change criteria and override thresholds to prevent sudden deceleration and stabilize vehicle behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If immediate stop or automated evacuation is performed without notifying operation takeover request, then emergency evacuation can be executed promptly, but vehicle behavior becomes unstable and following vehicles may be suddenly approached
Solution Approach 1:
The system performs preliminary notification to the driver before executing emergency evacuation. The operation takeover request is notified in advance, allowing the driver to prepare for the upcoming maneuver, which reduces sudden reactions and maintains vehicle stability during evacuation
Solution Approach 2:
The system cushions the impact of emergency evacuation by gradually notifying the driver beforehand. This preliminary warning acts as a buffer that prevents the driver from being caught off-guard, thereby avoiding excessive override operations that would cause unstable vehicle behavior
2Speed
If vehicle speed is suddenly decreased during emergency evacuation, then evacuation can be executed quickly, but driver override becomes excessive causing unstable vehicle behavior
Solution Approach 1:
The system notifies the driver of the upcoming speed decrease before actually decreasing speed. This preliminary notification allows the driver to mentally prepare for the deceleration, reducing the likelihood of excessive override operations when the speed change occurs
3Reliability
If automated lane change criteria use large predetermined area, then lane change safety is improved, but lane change execution time increases delaying evacuation
Solution Approach 1:
The system dynamically adjusts the predetermined area for lane change based on the emergency situation. During automated evacuation, the system uses a smaller predetermined area compared to normal operations, allowing faster lane change execution while still maintaining adequate safety through the preliminary notification to the driver
Solution Approach 2:
The system changes the parameter of predetermined area size based on operational context. In emergency evacuation mode, the predetermined area is reduced to enable quicker lane changes, while the driver notification mechanism compensates for the reduced safety margin
Data Source
AI summary
Vehicle driving control apparatus having function for performing automated in-lane driving by maintaining a vehicle speed when no preceding vehicle is in driving lane, and maintaining an inter-vehicle distance when a preceding other vehicle exists, function for performing automated lane change when there is no other vehicle in a predetermined area of neighboring lane, a function for notifying a driver of stopping the functions and an operation takeover request when a system failure occurs, function for evacuating vehicle to road shoulder when driver cannot resume operation, wherein, when vehicle is not in first lane neighboring road shoulder at operation of evacuating function, lane change from in-lane driving maintaining set inter-vehicle distance or set vehicle speed to first lane is performed, and prior thereto, a predetermined area serving as criterion of lane change to first lane is changed to a second area smaller than area of automated lane change.