Reverse Driving Brake Control for Avoidable Collision Prevention

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Solution Overview

Problem

Existing systems inaccurately determine the avoidability of collisions between reversing vehicles and moving objects, leading to excessive braking forces being applied when collisions are actually avoidable.

Innovation Solution

A driving assistance apparatus that acquires a first braking force smaller than the maximum braking force and a second braking force based on brake pedal depression, controlling the vehicle to generate these forces appropriately to avoid collisions while preventing excessive braking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If maximum braking force is generated to avoid collision between reversing vehicle and moving object, then collision avoidance capability is improved, but braking force becomes excessive causing unnecessary vehicle stoppage

Engineering Contradiction:

Improvecollision avoidance capabilityVSAvoidvehicle operation control

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system dynamically adjusts the braking force parameter based on detected distance and relative speed between the reversing vehicle and moving object. Instead of applying maximum braking force in all collision risks, the braking force is optimized to match the actual risk level, preventing excessive braking while ensuring collision avoidance when necessary

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system continuously monitors the distance and relative speed between the reversing vehicle and moving object, using this feedback to adjust the braking force in real-time. This closed-loop control ensures braking force is applied appropriately based on current conditions, avoiding both excessive and insufficient braking

Inventive Principle:

Principle #23Feedback

2Reliability

If distance detection is used to determine collision risk, then collision detection capability is improved, but measurement accuracy deteriorates due to detection errors

Engineering Contradiction:

Improvecollision detection capabilityVSAvoiddistance measurement accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The system performs preliminary distance and relative speed measurements before collision occurs, using these preliminary data to predict potential collision risk. By acting in advance with predicted values, the system can prepare appropriate braking force before the actual collision risk materializes, compensating for measurement uncertainties

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies braking force before actual collision occurs based on predicted distance and relative speed, creating a safety cushion that accounts for measurement uncertainties. This prior cushioning approach ensures that even with measurement errors, the vehicle stops safely without requiring perfectly accurate distance measurement

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS12600327B2Driving assistance apparatus, driving assistance method, and non-transitory storage medium

Publication Date: 2026.04.14 ISUZU MOTORS LTD

AI summary

A driving assistance apparatus includes a first acquisition part that acquires a first braking force enabling avoidance of a collision between a reversing vehicle that is reversing and a moving object approaching the reversing vehicle, a second acquisition part that acquires a second braking force on the basis of an amount of brake pedal depression, and a braking control part that causes the reversing vehicle to generate the first braking force if the first braking force is smaller than a maximum braking force of the reversing vehicle and the second braking force determined on the basis of the amount of brake pedal depression is smaller than the first braking force.