Modular Instrument Panel Cross Member for Lightweight A-Pillar Rigidity
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Solution Overview
Problem
Existing instrument panel supports in motor vehicles face challenges in creating a cost-effective, load-bearing, and rigid cross member that can be efficiently connected to the A-pillars, with varying cross-sectional configurations to adapt to different vehicle models and optimize weight distribution.
Innovation Solution
A modular cross member design with independently manufactured driver- and passenger-side longitudinal sections, featuring mounting components and reinforcement elements that allow for adaptable connections to A-pillars, optimized for static and dynamic forces, and tailored cross-sectional geometry to minimize material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the cross member is designed with a varying profile cross-section to adapt to different force ratios, then the weight of the cross member is optimized, but the manufacturing complexity and cost increase
Solution Approach 1:
The cross member is divided into multiple longitudinal sections, each with a uniform cross-section optimized for the local force conditions. These sections are connected by coupling elements, allowing each section to be manufactured independently using standard extrusion processes, thereby reducing overall manufacturing complexity while maintaining weight optimization
Solution Approach 2:
The cross-section parameters (dimensions, shape) are varied between different longitudinal sections to match the local force requirements - larger cross-sections in high-force areas and smaller cross-sections in low-force areas. This parameter adaptation allows weight optimization without requiring a single complex varying cross-section throughout
2Strength
If the cross member is designed to be load-bearing and rigid in its longitudinal extent, then the structural integrity is improved, but the material usage and weight increase
Solution Approach 1:
Each longitudinal section is designed with a cross-section optimized for the specific local load conditions it encounters. High-load areas receive stronger cross-sections while low-load areas use lighter cross-sections, ensuring structural integrity where needed without adding unnecessary weight elsewhere
Solution Approach 2:
The cross-section dimensions are dynamically adapted along the length of the cross member to match the varying force distribution - larger sections where forces are highest and progressively smaller sections where forces decrease, creating an optimized strength-to-weight ratio throughout the structure
3Ease of manufacture
If the cross member uses a standardized cross-section throughout, then the manufacturing cost is reduced, but the adaptability to different vehicle models and force distributions decreases
Solution Approach 1:
The cross member consists of multiple standardized longitudinal sections that can be manufactured using common extrusion processes. These standardized sections can be selectively combined in different configurations to adapt to various vehicle models and force distribution patterns, maintaining manufacturing efficiency while achieving versatility
Solution Approach 2:
The set of standardized cross-section sections serves multiple functions - each section type can be used in different vehicle models and positions along the cross member. The coupling elements provide universal connection capability, allowing the same standardized sections to be adapted to various structural requirements across different vehicle platforms
4Weight of moving object
If the cross member is assembled from multiple longitudinal sections with different cross-sections, then the weight is optimized for local forces, but the device complexity increases
Solution Approach 1:
The cross member is segmented into multiple longitudinal sections with different cross-sections, each optimized for local force conditions. These sections are connected by standardized coupling elements, which reduces the overall complexity compared to manufacturing a single complex varying cross-section, as each section can be produced using standard extrusion processes
Solution Approach 2:
The cross-section parameters are changed between different longitudinal sections to match local force requirements. By maintaining uniform cross-sections within each section and using standardized connections, the complexity is managed while still achieving parameter adaptation for weight optimization
Data Source
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AI summary
An instrument panel support for a motor vehicle has a cross member 1 that can be integrated between the A-pillars of a motor vehicle body. The driver-side longitudinal section 2 has an end section 62, which is composed of two shell parts 63, 64, wherein the end section 62 is configured rectangularly and has mounting openings 55 to 58 for the passage of fastening means in the longitudinal direction of the vehicle (x-axis) and wherein at least one reinforcing element 61, which is supported between legs 59, 60 of the end section 62, is integrated into the end section 62.