Braking Control System Following Vehicle Deceleration Matching

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Solution Overview

Problem

Existing braking control systems may fail to prevent collisions between a vehicle and a following vehicle, even if the driver of the following vehicle attempts to brake, due to insufficient deceleration, especially in scenarios where the following vehicle is not detected in time or when obstacles suddenly appear.

Innovation Solution

A braking control system that includes obstacle detection, first collision determination, following vehicle detection, information acquisition, and braking control means to ensure the vehicle's deceleration does not exceed the maximum deceleration of the following vehicle, with optional warning and steering controls to avoid collisions, particularly when multiple following vehicles are present or obstacles suddenly appear.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the vehicle applies strong braking to avoid collision with an obstacle, then the vehicle can stop in time, but the following vehicle may not be able to brake in time and could collide with the vehicle

Engineering Contradiction:

Improvecollision avoidance reliabilityVSAvoidrisk of following vehicle collision

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system continuously monitors the following vehicle's presence and deceleration capabilities, using this feedback to dynamically adjust the braking force applied. When a following vehicle is detected, the system reduces braking intensity to a level the following vehicle can match, preventing rear-end collisions while still maintaining safe stopping distance

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary detection of following vehicles and acquisition of their deceleration characteristics before applying full braking force. By anticipating the following vehicle's response capability in advance, the system can modulate braking intensity to prevent collisions before they occur

Inventive Principle:

Principle #10Preliminary action

2Object-affected harmful factors

If the vehicle reduces deceleration to prevent following vehicle collision, then following vehicle safety is improved, but the vehicle's ability to avoid the obstacle is reduced

Engineering Contradiction:

Improvefollowing vehicle collision riskVSAvoidobstacle avoidance capability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The system dynamically adjusts braking intensity based on real-time conditions including following vehicle detection and obstacle distance. The braking force is continuously modulated to maintain the optimal balance between avoiding the obstacle and preventing following vehicle collision, rather than using fixed braking patterns

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the deceleration parameter adaptively - using maximum deceleration when no following vehicle is present, and reducing to the following vehicle's maximum deceleration capability when one is detected. This parameter adjustment resolves the contradiction by optimizing for the dominant risk at each moment

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the system detects multiple following vehicles, then comprehensive safety coverage is improved, but determining the appropriate deceleration limit becomes more complex

Engineering Contradiction:

Improvemulti-vehicle safety coverageVSAvoiddeceleration limit determination complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Instead of trying to satisfy all following vehicles simultaneously with a complex multi-constraint optimization, the system inverts the approach by selecting the most restrictive case (smallest maximum deceleration) and applying that to all vehicles. This simplifies the control logic while ensuring safety for all following vehicles

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS11608041B2Braking control system, braking control method, and program

Publication Date: 2023.03.21 TOYOTA JIDOSHA KK

AI summary

A braking control system includes obstacle detection means for detecting an obstacle ahead of a vehicle, first collision determination means for determining whether the vehicle would collide with the obstacle ahead of the vehicle, following vehicle detection means for detecting a following vehicle traveling behind the vehicle, information acquisition means for acquiring a maximum deceleration set in the following vehicle, second collision determination means for determining whether the following vehicle would collide with the vehicle based on the maximum deceleration, and braking control means for controlling braking means of the vehicle so that an absolute value of a deceleration of the vehicle does not exceed an absolute value of the maximum deceleration of the following vehicle when the first collision determination means determines that the vehicle would collide with the obstacle and the second collision determination means determines that the following vehicle would collide with the vehicle.