Vehicle Driving Support Control for Late Collision Avoidance
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Solution Overview
Problem
Conventional collision avoidance systems do not adequately address situations where a vehicle is likely to collide with the end portion of a continuous structure, leading to unnecessary and uncomfortable intervention before the driver can initiate a driving operation to avoid the collision.
Innovation Solution
A vehicle driving support device that calculates and selects the latest start time for collision avoidance paths involving automatic braking or steering to avoid the end portion of a continuous structure, considering paths that stop in front of, pass alongside, or intersect the structure, thereby delaying the intervention until the driver is prepared.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If collision avoidance operation is executed early to ensure safety, then collision prevention reliability is improved, but driver comfort deteriorates due to unnecessary intervention
Solution Approach 1:
The patent segments the collision avoidance operation into multiple distinct paths (first avoidance path using automatic braking, second avoidance path using automatic steering parallel to continuous structure, third avoidance path using automatic steering to intersect continuous structure). Each path is evaluated independently with its own timing calculation, allowing the system to select the optimal path that balances safety and driver comfort rather than using a single conservative approach.
2Device complexity
If conventional device considers only first and second avoidance paths, then device complexity is reduced, but adaptability to end-portion collision scenarios deteriorates
Solution Approach 1:
The patent introduces dynamic adaptability by adding the third avoidance path that specifically responds to end-portion collision scenarios. The system dynamically selects among three different avoidance strategies based on the detected situation, with each path having distinct characteristics: automatic braking (first path), parallel steering (second path), and intersecting steering (third path). This dynamic adaptation ensures appropriate response to varying collision risks without permanently increasing system complexity.
Data Source
AI summary
The driving support ECU calculates a first avoidance path for avoiding collision between the host vehicle and the continuous structure only by automatic braking, a second avoidance path for avoiding collision between the host vehicle and the continuous structure by forward automatic steering, and a third avoidance path for avoiding collision between the host vehicle and the continuous structure by reverse automatic steering when it is determined that there is a possibility that the host vehicle collides with an end portion of the continuous structure. The driving support ECU selects, as the final collision avoidance path, an avoidance path in which the collision avoidance operation (any of the automatic braking, the forward automatic steering, and the reverse automatic steering) is started at the latest among the avoidance paths.