Modular Bumper Cross Member with Add-On Elements
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Solution Overview
Problem
Current bumper cross member systems for motor vehicles are not cost-effective and lack flexibility to adapt to varying crash requirements across different markets and regions, necessitating a modular design that can satisfy diverse safety standards while minimizing manufacturing and logistics costs.
Innovation Solution
A modular bumper cross member system featuring a base structure that extends transversely and includes crash boxes, with optional add-on elements such as cross member expansion elements and crash box extender elements, allowing for customization to meet specific crash requirements by increasing width or length, thus accommodating different national and regional safety standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a modular bumper cross member system with add-on elements is implemented, then adaptability to different crash requirements is improved, but device complexity increases
Solution Approach 1:
The bumper cross member system is divided into a base structure and separate add-on elements (cross member expansion elements and crash box extender elements). This segmentation allows the base structure to be manufactured uniformly while enabling customization through optional add-on components, resolving the contradiction between adaptability and complexity by making the system modular and configurable based on specific crash requirements.
Solution Approach 2:
The base structure is designed with universal features that can accommodate different add-on elements depending on the specific market and crash requirements. The base structure includes standardized interfaces and mounting points that allow it to serve multiple functions across different configurations, enabling a single base design to support various crash box lengths and cross member widths without requiring complete redesigns.
2Ease of manufacture
If uniform manufacturing of base structure is implemented, then manufacturing cost is reduced, but ability to meet specific regional crash standards is worsened
Solution Approach 1:
The system separates the manufacturing of the base structure from the add-on elements. The base structure can be manufactured uniformly at scale using cost-effective processes such as extrusion or stamping, while the add-on elements (cross member expansion elements and crash box extender elements) are produced separately and only as needed for specific regional markets. This segmentation enables economies of scale in base structure production while maintaining the flexibility to meet diverse regional crash standards through selective addition of appropriate elements.
3Reliability
If crash box length is increased to meet higher safety standards, then crash performance is improved, but manufacturing and logistics cost increases
Solution Approach 1:
The crash box system is segmented into a standard-length base crash box and separate extender elements. This allows the base crash box to be manufactured uniformly for all vehicles, while extender elements are added only to crash boxes that require enhanced crash performance for specific regional standards. This segmentation reduces overall manufacturing and logistics costs by avoiding the need to produce and ship different-length crash boxes for every market, while still enabling improved crash performance where required.
Data Source
AI summary
A bumper cross member system for a motor vehicle having a base structure including a bumper cross member that, in the post-assembly position, extends transversely relative to the vehicle, and two crash boxes that, in the post-assembly position, extend from the bumper cross member longitudinally relative to the vehicle, at least one of the following add-on elements being configured on the base structure: a cross member expansion element, which, starting from an outer side of the bumper cross member, extends transversely relative to the vehicle outwardly in such a way that an extended base structure having an enlarged width is obtained, and/or a crash box extender element that extends from the bumper cross member in the post-assembly position forwardly longitudinally relative to the vehicle in such a way that an extended base structure having an elongated crash box is obtained. Also, a modular system and a motor vehicle having a bumper cross member system.