Modular Door-Handle Inertial Device With Rheopectic Fluid
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Solution Overview
Problem
Existing inertial systems for vehicle door handles are complex, difficult to manufacture, and require careful calibration, making them challenging to install and maintain, with a narrow safety margin that can lead to false positives or negatives, and are not easily adaptable to different handle types.
Innovation Solution
A modular inertial device using a non-Newtonian fluid and rotor system that can be easily connected and disconnected from different door handle shafts without complex tools, featuring a housing with a single connection point and a rheopectic fluid that increases viscosity to limit rotor rotation during crashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated inertial system is designed for each type of new handle, then the reliability and precision of door opening prevention is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent implements a universal inertial device design that can be adapted to multiple door handle types through modular components. The housing contains standardized mounting features and the non-Newtonian fluid system provides universal crash detection functionality, allowing one design to serve multiple handle configurations without requiring complete redesign for each application.
Solution Approach 2:
The inertial system is divided into separable modules including the housing, non-Newtonian fluid chamber, rotor assembly, and mounting components. This segmentation allows individual components to be manufactured independently and assembled into different handle configurations, reducing overall system complexity while maintaining reliability across applications.
2Strength
If the inertial system is mounted adjacent the interior surface of an escutcheon plate, then the structural integration is improved, but the ease of repair and replacement deteriorates
Solution Approach 1:
The inertial device is designed as a separable module that can be detached from the door handle assembly. The housing includes external mounting features that allow the device to be removed and replaced without disassembling the entire handle mechanism or accessing internal structures, significantly improving maintenance accessibility.
Solution Approach 2:
The patent introduces an intermediate mounting mechanism that connects the inertial device to the door handle externally. This intermediary connection system allows the device to be securely attached during operation but easily removed when maintenance is needed, bridging the gap between structural integration and serviceability.
3Manufacturing precision
If complex tools are used for mounting the inertial device, then the manufacturing precision and secure attachment are improved, but the ease of manufacture and installation deteriorates
Solution Approach 1:
The mounting system is designed to be self-aligning and self-securing through features such as snap-fit connections, threaded fasteners with integrated drives, or tool-less locking mechanisms. These self-service mounting features ensure precise attachment without requiring specialized tools or complex installation procedures, making the system easy to manufacture and install.
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
The modular system provides adaptable and efficient door handle protection by preventing accidental opening during crashes, with a simple and cost-effective design that reduces manufacturing complexity and enhances durability.
Implementation Method 1
a non-Newtonian fluid located within the housing, and a rotor at least partly immersed in the non-Newtonian fluid and intended to rotate about a rotor axis
Implementation Method 2
The non-Newtonian fluid may be a rheopectic fluid
Data Source
AI summary
A device configured to be mounted on a door handle of a motor vehicle includes a housing, a non-Newtonian fluid located within the housing, and a rotor at least partly immersed in the non-Newtonian fluid and intended to rotate about a rotor axis. The device forms a modular device configured to be connected to one end of a shaft of a door handle. A door handle assembly configured to be connected to the device is also provided.