Frontal Collision Assistance Control With Adaptive Preliminary Maneuvers

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Solution Overview

Problem

Automated steering control becomes difficult when there is no avoidance space on the lateral side of a target object, limiting the control margin, and conventional automated driving technologies struggle to perform appropriate preliminary operations in dynamic environments.

Innovation Solution

A driving assistance device and method that includes a processor to recognize objects, execute preliminary operations such as deceleration and steering maneuvers, and adjust operation conditions based on thresholds and driver engagement, ensuring appropriate responses to potential collisions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If automated steering control is added to automated deceleration control, then the ability to cope with sudden environmental changes is improved, but the control margin is reduced when there is no avoidance space on the lateral side

Engineering Contradiction:

Improveability to cope with sudden environmental changesVSAvoidcontrol margin

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The system performs preliminary operations (initial deceleration or steering input) when an object is detected at a distance, preparing the vehicle for potential collision avoidance before the critical moment arrives. This advance action allows the vehicle to be in a better state to handle sudden environmental changes while maintaining control margin by not requiring maximum steering effort at the last moment.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the preliminary operation based on real-time conditions such as the type of object detected, vehicle speed, and surrounding environment. By making the control characteristics adaptable rather than fixed, the system can optimize the balance between responsiveness to sudden changes and maintaining adequate control margin for each specific situation.

Inventive Principle:

Principle #15Dynamics

2Extent of automation

If automated driving control is implemented, then driving automation is achieved, but it becomes difficult to perform appropriate preliminary operations in dynamic environments

Engineering Contradiction:

Improveautomated driving controlVSAvoidappropriate preliminary operation

Core Design Contradiction:

Extent of automationVSAdaptability or versatility

Solution Approach 1:

The system continuously monitors environmental conditions, object characteristics, and vehicle state, using this feedback to dynamically adjust the preliminary operation strategy. This closed-loop control enables the automated system to adapt to dynamic environments by real-time evaluation of whether to perform preliminary deceleration, steering input, or other preparatory actions based on detected conditions.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system changes control parameters such as deceleration rate, steering angle, and timing of preliminary operations based on the detected object type and environmental context. By adjusting these parameters dynamically rather than using fixed values, the automated driving control can perform appropriate preliminary operations adapted to each specific situation.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If preliminary operations are executed early, then control margin is improved, but the timing and appropriateness of operations may be compromised without proper adaptation to driving state

Engineering Contradiction:

Improvecontrol marginVSAvoidoperation timing

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The system makes the timing and characteristics of preliminary operations dynamic rather than fixed, adjusting them based on real-time assessment of the situation. This allows the system to optimize both the timing (to maintain control margin) and appropriateness (to avoid premature or incorrect actions) of preliminary operations by continuously adapting to the current driving context.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12589735B2Driving assistance device, vehicle control system, and driving assistance method for frontal collision detection and avoidance

Publication Date: 2026.03.31 HONDA MOTOR CO LTD

AI summary

A driving assistance device mounted in a vehicle operates together with an automated driving control device for automatically controlling steering, acceleration, and deceleration of the vehicle in either of a first state in which a driver is not gripping a steering operation element and a second state in which the driver is gripping the steering operation element, the driving assistance device including a storage medium storing computer-readable instructions and at least one processor connected to the storage medium. The at least one processor makes an operation start condition of a second preliminary operation loose when the automated driving control device is operating in the second state as compared with when the automated driving control device is not operating.