Bumper Cross-Member Segmentation for Airflow and Impact
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Solution Overview
Problem
Existing bumper cross-members lack improved collision compatibility and air flow permeability, particularly with limited vertical extension and non-uniform force distribution during impacts.
Innovation Solution
A bumper cross-member design featuring an outer and inner shell with cut-outs in the x-direction, divided into multiple hollow chamber sections along the z-direction, allowing air flow and reinforcing the structure for enhanced collision compatibility and energy absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bumper cross-member is extended vertically to improve collision compatibility, then the collision compatibility is improved, but the air flow to units behind the bumper is blocked
Solution Approach 1:
The bumper cross-member is divided into multiple hollow chamber sections (first, second, and third sections) separated by cut-out portions. This segmentation allows the structure to achieve greater vertical extension for improved collision compatibility while the cut-outs provide pathways for air flow to units behind the bumper, thus resolving the contradiction between vertical extension and air flow blockage.
2Object-generated harmful factors
If the bumper cross-member includes multiple hollow chamber sections separated by cut-outs, then air flow is improved, but the structural strength may be reduced
Solution Approach 1:
The cut-out portions are strategically positioned and designed with specific geometries to maintain structural strength while enabling air flow. The hollow chamber sections are configured with optimized wall thicknesses and the cut-outs are placed to minimize impact on overall structural integrity while maximizing air flow benefits to units behind the bumper.
3Stability of the object's composition
If the vertical extension of the bumper cross-member is increased, then the force distribution during impact becomes more uniform, but the complexity of the structure increases
Solution Approach 1:
The bumper cross-member is segmented into multiple hollow chamber sections (first, second, and third sections) separated by cut-out portions. This segmentation enables the structure to achieve greater vertical extension for improved collision compatibility while the cut-outs provide pathways for air flow to units behind the bumper, thus resolving the contradiction between vertical extension and air flow blockage.
Solution Approach 2:
The hollow chamber sections serve multiple functions: they provide structural strength for collision compatibility, enable uniform force distribution during impact, and when combined with cut-outs, facilitate air flow to units behind the bumper. This multi-functionality reduces the need for additional separate components, thereby managing structural complexity.
Data Source
AI summary
A bumper cross-member for a vehicle having an outer shell and an inner shell connected to the outer shell and having a cut-out section which comprises at least one cut-out passing through the bumper cross-member in the x-direction. The bumper cross-member is divided in the z-direction thereof into at least three sections, of which a first and a second hollow chamber section are separated by a cut-out section located between them.