Dynamic Override Threshold for Emergency Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In automated lane keeping systems, when the emergency avoidance control is activated due to an oncoming vehicle, there is a risk of excessive driver override, leading to potential collisions or veering off the road, as drivers may panic and perform inappropriate manual driving operations.
Innovation Solution
A driving control apparatus that includes an environmental condition estimating part for recognizing the vehicle's surroundings, a path generating part for creating a target path, and a vehicle control part for speed and steering control, with an override function that sets higher threshold values for control interventions during emergency avoidance control, especially when an oncoming vehicle is detected, to prevent excessive driver overrides and maintain stable emergency avoidance operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the override function allows driver intervention during EM function activation, then driver control flexibility is improved, but excessive override operations may cause collision or veering off the road
Solution Approach 1:
The patent changes the threshold parameter for override detection based on the detection result of oncoming vehicles. When an oncoming vehicle is detected during EM function activation, the override threshold is set to a higher value, making it more difficult for driver operations to trigger an override. This dynamic parameter adjustment resolves the contradiction by maintaining driver control flexibility through the override function while preventing excessive override operations that could cause collision or veering off the road.
2Speed
If the override threshold is set low, then driver control responsiveness is improved, but stable emergency avoidance control deteriorates
Solution Approach 1:
The patent implements a dynamic threshold adjustment mechanism where the override threshold is not fixed but changes based on the detection of oncoming vehicles. During EM function activation with oncoming vehicle detection, the threshold is raised to maintain stability. This dynamic approach resolves the contradiction by providing responsive control when needed while ensuring stable emergency avoidance control when oncoming vehicles are present.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
[Problem to be Solved] To suppress excessive override in an automated lane keeping system when an EM function is activated due to approach of an oncoming vehicle. [Solution] In a driving control apparatus for a vehicle having an in-lane automated driving function that performs in-lane automated driving for maintaining a set speed if no other vehicle is present ahead in the lane of the vehicle and maintaining a set inter-vehicle distance if another vehicle is present ahead, an EM function that executes an emergency avoidance control, including activation of emergency braking, if a collision with an obstacle present ahead in the lane of the vehicle is predicted, and an override function that, if there is a control intervention equal to or greater than a prescribed threshold value by a driver while the in-lane automated driving function or the EM function is active, stops the function which is active and transfers control to the driver, an environmental condition estimating part 11 is configured to determine whether the obstacle present ahead in the lane of the vehicle is an oncoming vehicle traveling in an opposite direction along a target path, and the override function is configured such that a first threshold value is set as the prescribed threshold value while the in-lane automated driving function is active and a second threshold value is set as the prescribed threshold value when the EM function is activated and the oncoming vehicle is detected, the second threshold value being greater than the first threshold value.