Steering Column Breakaway Panel Design
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Solution Overview
Problem
In vehicle impacts, existing designs fail to effectively absorb energy and manage the forward movement of the steering column relative to the instrument panel, which can lead to inadequate protection for the driver and inefficient deployment of airbags.
Innovation Solution
A design incorporating a releasable panel connected to the steering column via a cable, featuring tear seams and hinges, which allows the panel to break and absorb energy during impacts, enabling controlled forward movement of the steering column and potential release of the cable when tensile loads exceed a certain threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the steering column is designed to deform and move forward relative to the instrument panel during impact, then energy absorption and driver protection are improved, but the structural stability and positioning of the steering column may be compromised
Solution Approach 1:
The instrument panel is segmented into a fixed bezel and a releasable panel that can separate during impact. This segmentation allows the releasable panel to break away and absorb energy through controlled deformation, while the fixed bezel maintains structural stability and supports the steering column's forward movement without compromising overall structural integrity.
Solution Approach 2:
The releasable panel acts as an intermediary element between the fixed bezel and the steering column. During normal operation, it provides structural support, but during impact, it serves as a controlled energy absorption mechanism that breaks away to facilitate steering column movement while protecting the driver, thus mediating between structural stability and energy absorption requirements.
2Loss of energy
If a releasable panel with tear seams is added to enable controlled breakaway, then energy absorption is improved, but device complexity increases
Solution Approach 1:
The instrument panel is divided into a fixed bezel and a releasable panel connected by tear seams. This segmentation enables the releasable panel to break away in a controlled manner during impact, providing energy absorption functionality without requiring complex active control systems, sensors, or actuators.
Solution Approach 2:
The releasable panel is designed as a disposable component that is intended to break away during severe impacts. By using a simple, low-cost panel with predetermined tear seams rather than a complex, reusable active breakaway system, the design achieves energy absorption functionality while minimizing device complexity and cost.
3Ease of operation
If the cable connecting the releasable panel to the steering column is designed to release under tensile load, then controlled movement and energy management are improved, but reliability of the connection may be reduced
Solution Approach 1:
The cable is designed with specific tensile load thresholds that trigger its release mechanism. By carefully selecting the cable's material properties, diameter, and connection strength, the system ensures the cable remains reliable under normal operating loads while automatically releasing under the high tensile loads experienced during severe impacts, thus balancing connection reliability with controlled movement requirements.
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
This design enhances energy absorption and controlled movement of the steering column, potentially improving driver safety by managing impact forces and facilitating more effective airbag deployment.
Implementation Method 1
the releasable panel is designed to break away from the bezel and absorb energy during movement of the steering column relative to the instrument panel
Implementation Method 2
The steering column may be designed to deform relative to the instrument panel when impacted by a driver during a vehicle impact. The forward movement of the steering column may absorb energy from the driver
Implementation Method 3
The cable may be designed to release from the steering column when tensile load on the cable exceeds a predetermined threshold
Data Source
AI summary
An assembly includes a steering column and an instrument panel. A bezel is fixed to the instrument panel. A releasable panel is releasably connected to the bezel. A cable extending from the releasable panel to the steering column. In the event of a vehicle impact, the releasable panel releases from the bezel to absorb energy from the steering column.