Driving Support Apparatus with Dynamic Override Conditions
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Solution Overview
Problem
Conventional driving support systems fail to prevent collisions between a host vehicle and a rear approaching vehicle when the driver changes lanes without noticing the rear vehicle, leading to potential deviation from the travel area and collision.
Innovation Solution
A driving support apparatus that executes deviation warnings and vehicle controls to prevent deviation from the travel area, with adjustable override conditions based on the presence of a rear approaching vehicle, making it harder to satisfy override conditions during lane changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the override condition is set to be satisfied when the driver performs steering intervention, then the driver's manual control is recognized and deviation control is stopped, but the driver's intentional lane change to avoid a rear collision is mistakenly stopped
Solution Approach 1:
The patent changes the parameter of the override condition by introducing a dual-condition evaluation system. Instead of relying solely on steering angle threshold, it combines steering angle detection with rear vehicle presence detection. When a rear vehicle is detected, the system raises the steering angle threshold or requires additional confirmation, thereby adjusting the sensitivity parameter to prevent false override while still recognizing genuine driver interventions.
Solution Approach 2:
The patent introduces an intermediary condition (rear vehicle detection status) that mediates between the driver's steering input and the deviation control termination. This intermediary layer analyzes both the steering operation and the rear vehicle situation before deciding whether to stop the deviation control, preventing direct override when a rear vehicle is present and potentially dangerous.
2Ease of operation
If the deviation control is stopped when the driver steers to change lanes, then the driver's lane change maneuver is permitted, but the host vehicle may collide with a rear approaching vehicle that is changing lanes to overtake
Solution Approach 1:
The patent applies preliminary anti-action by detecting the presence of a rear approaching vehicle before the collision occurs. When a rear vehicle is detected in a position where it may change lanes to overtake, the system proactively prevents the override condition from being satisfied, thereby maintaining deviation control as a protective measure against the potential collision.
Solution Approach 2:
The patent implements feedback by continuously monitoring the rear vehicle's position, speed, and lane change behavior, and using this information to dynamically adjust the override condition. The system feeds back the rear vehicle status to the deviation control decision-making process, ensuring that the control termination is based on real-time situational awareness rather than just steering input.
3Device complexity
If the override condition uses a fixed steering angle threshold, then the system is simple to implement, but it cannot distinguish between accidental steering and intentional lane change in the presence of rear vehicles
Solution Approach 1:
The patent changes the parameter structure from a single fixed threshold to a dynamic, multi-parameter evaluation system. It introduces rear vehicle distance, relative speed, and lane position as additional parameters that modify the effective threshold. This parameter transformation allows the system to adapt the override sensitivity based on the rear vehicle situation, improving reliability without excessive complexity.
Solution Approach 2:
The patent makes the override condition dynamic by adjusting its criteria based on the real-time presence and state of rear vehicles. Instead of a static threshold, the system dynamically modifies the override condition parameters (such as threshold values or required duration of steering input) according to the rear vehicle detection status, enabling adaptive response to different driving scenarios.
Data Source
AI summary
A driving support apparatus is configured to execute, as a deviation control, at least one of a deviation waring for informing a driver of a host vehicle that the host vehicle deviates from a travel area and a vehicle control for controlling a travel state of the host vehicle so that the host vehicle does not deviate from the travel area. The driving support apparatus is configured to suspend or terminate the deviation control when an override condition is satisfied while the deviation control is being executed, and make the override condition more difficult to be satisfied when there is a rear approaching vehicle in the travel area than when there is no rear approaching vehicle in the travel area.