Partial Braking for Door-Side Collision Avoidance

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Solution Overview

Problem

Forward Collision-Avoidance Assist systems often perform indiscriminate braking, making it difficult for passengers to exit a vehicle after an accident, especially when the door is damaged.

Innovation Solution

A vehicle system that includes an obstacle detector and a controller to predict collisions on the side of the door, calculating the required braking distance or time to collision, and performing partial braking to avoid or mitigate collisions by selectively braking wheels, thereby securing space for escape.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If FCA performs indiscriminate braking control when an obstacle is recognized, then collision avoidance capability is improved, but passenger egress capability deteriorates when the door is damaged

Engineering Contradiction:

Improvecollision avoidance capabilityVSAvoidpassenger egress capability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The braking force is applied selectively to specific wheels rather than uniformly to all wheels. When a door-side collision is predicted, the controller applies braking force only to wheels on the opposite side of the door, creating asymmetric braking that preserves door integrity while still achieving collision avoidance. This local differentiation of braking application resolves the contradiction between collision avoidance and passenger egress capability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The braking system is segmented into independent wheel-level control units, allowing differential braking forces to be applied to different wheels. The controller can independently control braking force on each wheel based on the predicted collision scenario, enabling selective braking that preserves the door side while still providing effective collision mitigation.

Inventive Principle:

Principle #1Segmentation

2Force

If full braking control is applied to stop the vehicle, then collision impact is reduced, but the vehicle may rotate excessively making door access difficult

Engineering Contradiction:

Improvebraking forceVSAvoidvehicle orientation stability

Core Design Contradiction:

ForceVSStability of the object's composition

Solution Approach 1:

Braking force is applied locally to specific wheels rather than uniformly across all wheels. By applying braking force only to non-door-side wheels when door-side collision is predicted, the system reduces overall braking intensity while preventing excessive vehicle rotation, thus maintaining both collision mitigation and vehicle stability for door access.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Asymmetric braking is implemented by applying different braking forces to wheels on opposite sides of the vehicle. When a door-side collision is predicted, braking is applied only to the opposite side, creating an asymmetric braking pattern that reduces the risk of excessive vehicle rotation while still providing sufficient deceleration to mitigate collision impact.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS10793120B2Control method to avoid collision and vehicle using the same

Publication Date: 2020.10.06 HYUNDAI MOTOR CO LTD

AI summary

Disclosed herein are a vehicle and a control method thereof. The vehicle includes an obstacle detector for detecting an obstacle around the vehicle, and a controller configured to predict a chance of a collision with the obstacle on the side of a door if the obstacle detector detects the obstacle in front, and to perform partial braking control on the vehicle if the collision on the side of the door is predicted.