Closure Drive Motor Mount With Integrated EMC Shielding

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Solution Overview

Problem

Existing drive units for motor vehicle closure elements face challenges in meeting electromagnetic compatibility (EMC) requirements without increasing component count and space requirements.

Innovation Solution

Incorporating a decoupling element designed electrically conductively to cover transition regions between housing parts, which also provides acoustic decoupling and optional ground connection, reducing the need for additional shielding elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If additional shielding elements are added to meet EMC requirements, then electromagnetic compatibility is improved, but the number of components and space requirements increase

Engineering Contradiction:

ImproveEMC propertiesVSAvoidnumber of components

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent combines the shielding function with the existing decoupling element that is already required for acoustic decoupling of the drive motor. By integrating electromagnetic shielding into the decoupling element, the patent eliminates the need for separate shielding components while maintaining both acoustic decoupling and EMC protection functions.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The decoupling element is designed to serve multiple functions simultaneously: acoustic decoupling of the drive motor and electromagnetic shielding of transition regions between housing parts. This multi-functional design allows a single component to address both acoustic and electromagnetic interference issues without requiring additional specialized components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Object-affected harmful factors

If additional shielding elements are added to meet EMC requirements, then electromagnetic compatibility is improved, but the amount of space required increases

Engineering Contradiction:

ImproveEMC propertiesVSAvoidspace required

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The shielding function is merged into the existing decoupling element structure, eliminating the need for additional space-consuming separate shielding components. The decoupling element maintains its acoustic decoupling function while simultaneously providing electromagnetic shielding coverage.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The multi-functional decoupling element provides both acoustic decoupling and electromagnetic shielding within the same spatial footprint, avoiding the need for additional space that would be required if separate shielding elements were installed.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If the decoupling element is designed electrically conductively to provide shielding, then EMC properties are improved, but the acoustic decoupling performance may be affected

Engineering Contradiction:

ImproveEMC propertiesVSAvoidacoustic decoupling performance

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The decoupling element is designed as a composite structure combining electrically conductive materials for electromagnetic shielding with elastomeric materials for acoustic decoupling. This composite construction allows the element to provide both electromagnetic shielding and effective acoustic decoupling simultaneously without compromising either function.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The decoupling element features locally differentiated properties: electrically conductive regions for electromagnetic shielding and elastomeric regions for acoustic decoupling. This local quality differentiation allows each region of the component to optimize its specific function while working together as an integrated system.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances EMC properties with minimal design outlay by using a decoupling element that covers transition regions, thereby reducing the number of components and space required, while allowing for optional ground connections.

Implementation Method 1

a decoupling element is provided for the mounting of the drive, which can be designed elastically in particular for the acoustic decoupling of the drive motor

Methodology Applied

Scientific EffectAcoustic decoupling: Damping

Implementation Method 2

the decoupling element is designed electrically conductively at least in sections and covers a transition region between the housing parts

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12523083B2Drive unit for motorised adjustment of a closure element of a motor vehicle

Publication Date: 2026.01.13 BROSE FAHRZEUGTEILE GMBH & CO KG

AI summary

A drive unit for the motor-driven adjustment of a closure element of a motor vehicle, wherein the drive unit has mechanical drive connections, which are linearly adjustable relative to each other, and a drive train, which is coupled to the drive connections, with an electric drive motor, wherein the drive motor has a motor shaft and a motor housing, wherein the motor housing is composed of a plurality of housing parts and is mounted in the drive unit via a decoupling element. It is proposed that the decoupling element is designed electrically conductively at least in sections and covers a transition region between the housing parts.