Dual-Backup Brake Control Layout With Reduced Cabling Complexity

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Solution Overview

Problem

Existing vehicle brake systems with dual MCUs increase deployment difficulty and costs while ensuring brake safety, as they require complex signal connections and higher performance requirements.

Innovation Solution

A dual-backup brake system with independent controllers for front and rear wheel brake apparatuses, allowing redundancy and simplified cabling, where each controller can operate independently or with a backup mechanism to ensure brake safety even if one fails.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If two MCUs are disposed to separately control EMBs with full signal connections, then brake safety is improved through redundancy, but system complexity and deployment difficulty increase

Engineering Contradiction:

Improvebrake safetyVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The brake control system is segmented into two independent control paths: the first controller manages front wheel brake apparatuses while the second controller manages rear wheel brake apparatuses. This segmentation allows each controller to operate independently with reduced cabling requirements, while the backup brake apparatus provides cross-functional redundancy to maintain brake safety.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The backup brake apparatus serves as an intermediary mechanism that can be activated by either controller to provide brake force when needed. This mediator component enables simplified controller design and reduced signal connections while maintaining the redundancy necessary for brake safety through its ability to receive control signals from both controllers.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If two MCUs are disposed to separately control EMBs with full signal connections, then brake safety is improved through redundancy, but costs increase

Engineering Contradiction:

Improvebrake safetyVSAvoidcosts

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If simplified independent controller operation is implemented, then system complexity and costs are reduced, but brake safety may be compromised without redundancy

Engineering Contradiction:

Improvesystem complexityVSAvoidbrake safety

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The backup brake apparatus is pre-configured to receive control signals from both the first and second controllers, creating a cushioning safety mechanism. When one controller or its connected brake apparatus fails, the backup apparatus can be activated by the remaining functional controller to provide brake force, preventing total brake system failure and maintaining brake safety.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The system dynamically changes operational parameters based on failure detection. When a controller or brake apparatus is determined to be abnormal, the system transitions from normal dual-controller operation to a backup mode where the functional controller activates the backup brake apparatus, thereby maintaining brake safety through adaptive parameter changes.

Inventive Principle:

Principle #35Parameter changes

4Reliability

If complex signal connections between controllers and all brake apparatuses are implemented, then brake safety is ensured, but cabling difficulty increases

Engineering Contradiction:

Improvebrake safetyVSAvoidcabling difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20260054702A1Dual-backup brake system of vehicle and vehicle

Publication Date: 2026.02.26 HUAWEI DIGITAL POWER TECH CO LTD

AI summary

A dual-backup brake system of a vehicle to reduce costs of the brake system and difficulty of deploying the brake system. The brake system includes a first controller, a second controller, a backup brake apparatus, a front wheel brake apparatus, and a rear wheel brake apparatus. The first controller is configured to: output a first control signal, and control the brake motor of the front wheel brake apparatus to output a brake force, or control the brake of the front wheel brake apparatus and the brake of the rear wheel brake apparatus to receive the brake force output by the backup brake apparatus. The second controller is configured to: output the brake force, or control the brake of the front wheel brake apparatus and the brake of the rear wheel brake apparatus to receive the brake force output by the backup brake apparatus.