Adaptive Deceleration Assistance Leveling From Weak Driver Inputs

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Solution Overview

Problem

Existing vehicle deceleration assistance systems fail to appropriately adjust the assistance level based on driver feedback, leading to excessive deceleration feelings when drivers perform weak acceleration or deceleration operations, affecting driver convenience.

Innovation Solution

A vehicle deceleration assistance apparatus that adjusts the assistance level by proposing or autonomously decreasing it when weak acceleration or deceleration operations are performed a certain number of times, using different conditions based on the execution of deceleration assistance control and the detection of a deceleration target.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the deceleration assistance control executes with a high assistance level, then the deceleration support for the vehicle is improved, but the driver may feel that the assistance level is excessive when performing weak acceleration or deceleration operations

Engineering Contradiction:
Improvedeceleration supportVSAvoidexcessive assistance level perception
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The system monitors driver operations (acceleration/deceleration requests) and uses this feedback to determine whether to propose or autonomously decrease the assistance level. When weak operations are detected a predetermined number of times, the system interprets this as feedback that the current assistance level is excessive and adjusts accordingly.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The assistance level is made dynamically adjustable rather than fixed. The system can switch between different assistance levels (first assistance level and second assistance level) based on detected driver behavior patterns, allowing the assistance characteristic to adapt to actual driver needs.

Inventive Principle:
Principle #15Dynamics

2Device complexity

If the assistance level is fixed, then the system complexity is reduced, but the driver convenience is decreased when the assistance level does not match driver preferences

Engineering Contradiction:
Improvesystem complexityVSAvoiddriver convenience
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The system automatically adjusts the assistance level based on detected driver behavior patterns without requiring manual driver input or configuration. The electronic control unit autonomously determines when to propose or decrease the assistance level based on predetermined operation conditions, making the system self-adjusting to driver preferences.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system changes the assistance level parameter (from first assistance level to second assistance level) based on detected operation patterns. This allows the system to adapt to different driver preferences and conditions while maintaining a relatively simple overall structure.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS12515644B2Vehicle deceleration assistance apparatus
Publication Date: 2026.01.06 TOYOTA JIDOSHA KK
  • US12515644B2 patent drawing
  • US12515644B2 patent drawing
  • US12515644B2 patent drawing

AI summary

A vehicle deceleration assistance apparatus proposes a decrease of an assistance level by a deceleration assistance control to an operator or autonomously decreases the assistance level when a weak acceleration or deceleration operation is carried out a predetermined weak acceleration or deceleration operation number of times or more. The weak acceleration operation is an acceleration operation satisfying a predetermined acceleration operation condition that the acceleration operation having an acceleration operation degree equal to or smaller than a predetermined acceleration operation degree, continues being carried out for a predetermined acceleration operation period of time. The weak deceleration operation is a deceleration operation satisfying a predetermined deceleration operation condition that the deceleration operation having a deceleration operation degree equal to or smaller than a predetermined deceleration operation degree, continues being carried out for a predetermined deceleration operation period of time.