Vehicle Braking Control Using Frequent Collision Points
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Solution Overview
Problem
Conventional vehicle collision avoidance systems frequently provide alerts and automatic braking at non-dangerous points due to lack of consideration for the frequency of past collision avoidance events, annoying vehicle occupants.
Innovation Solution
A vehicle control system that utilizes an external device to register and communicate frequent collision avoidance points, allowing for pre-pressurization of brakes and targeted alerts based on the likelihood of future collisions, reducing unnecessary alerts and quickening response times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alerts are provided at all points where automatic braking was performed in the past, then collision avoidance is improved, but occupant annoyance increases due to frequent false alerts at non-dangerous points
Solution Approach 1:
The patent applies local quality by differentiating between frequent activation points (high correlation with future automatic braking) and frequent activation candidate points (lower correlation). The controller provides alerts only at frequent activation points while performing auxiliary control (pre-pressurization) at candidate points, creating localized different levels of alert provision based on the specific characteristics of each location.
Solution Approach 2:
The patent changes the parameter of alert provision from a binary state (alert or no alert) to a graduated scale with three levels: alerts at frequent activation points, auxiliary control at candidate points, and no control at other points. This parameter change allows the system to optimize both safety and occupant comfort by adjusting the intensity of control based on location-specific risk levels.
2Reliability
If alerts are provided at frequent danger avoidance points, then collision risk is reduced, but response time is insufficient because brake pre-pressurization is not performed
Solution Approach 1:
The patent applies preliminary action by performing auxiliary control (pre-pressurization of brake fluid) in advance when the vehicle approaches frequent activation candidate points, before actual automatic braking is needed. This preliminary preparation of the braking system reduces the response time when real collision avoidance is required, while still maintaining safety through selective alert provision at high-risk locations.
3Measurement precision
If the system distinguishes between frequent activation points and candidate points, then alert accuracy is improved, but device complexity increases due to additional classification logic
Solution Approach 1:
The patent uses an intermediary approach by introducing the concept of frequent activation candidate points as a intermediate category between frequent activation points and ordinary points. This intermediary classification allows the system to prepare for potential future automatic braking events without providing full alerts, thereby improving alert accuracy while managing complexity through a structured three-level classification system.
Data Source
AI summary
A vehicle control ECU includes: a controller configured to perform automatic braking when the controller determines that the risk of collision between an object and a host vehicle is equal to or higher than an automatic braking threshold; and a communication device configured to communicate with an external device located outside the host vehicle. The vehicle control ECU receives specific point-related information from the external device via the communication device. The specific point-related information is information identifying a point where the automatic braking has been performed in the past and having a correlation with a level of possibility that the automatic braking is newly performed at the point. When the host vehicle approaches the point identified by the specific point-related information, the vehicle control ECU performs either first control or second control according to the specific point-related information.