Dash Lower Panel Reinforcing Panel Cross-Section Intersection
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Solution Overview
Problem
Existing vehicle body structures around the dash lower panel face challenges in achieving improved rigidity and strength while minimizing the number of components and weight, particularly in reducing deformation during narrow offset and oblique collisions.
Innovation Solution
A vehicle body structure incorporating a reinforcing panel with horizontal and vertical closed cross-section defining portions that intersect each other, integrated with the dash lower panel, side sills, and a dash cross member, formed through a hot stamping process to enhance rigidity and strength without increasing component count or weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a separate gadget member is mounted above the dashboard cross member to reduce deformation of the wheel-arch-shaped portion, then the deformation resistance is improved, but the number of components increases and the production process becomes complex
Solution Approach 1:
The reinforcing panel is integrated with the dash lower panel through hot stamping to form an integral structure. The reinforcing panel includes a horizontal closed cross-section defining portion and a vertical closed cross-section defining portion that work together to reinforce the wheel-arch-shaped portion, eliminating the need for separate gadget members and reducing component count while maintaining deformation resistance
2Strength
If the dashboard cross member is made with larger thickness to have higher rigidity and strength, then the rigidity and strength are improved, but the weight of the dashboard cross member increases
Solution Approach 1:
Instead of increasing thickness in one dimension, the reinforcing panel creates closed cross-sections in both horizontal and vertical dimensions by integrating with the wheel-arch-shaped portion. This multi-dimensional reinforcement approach provides equivalent or superior rigidity and strength without increasing material thickness or weight
3Stability of the object's composition
If multiple separate members are used to reinforce the wheel-arch-shaped portion, then the rigidity and strength are improved, but the component count increases
Solution Approach 1:
The reinforcing panel is formed as an integral part of the dash lower panel through hot stamping, combining multiple reinforcement functions (horizontal closed cross-section, vertical closed cross-section) into a single component. This reduces the number of separate parts while maintaining the structural stability and rigidity provided by the closed cross-section geometry
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 configuration effectively reduces deformation of the wheel-arch-shaped portion during collisions, maintains a reduced component count, and achieves improved rigidity and strength, while also minimizing weight and dimensional errors through the hot stamping process.
Implementation Method 1
formed through a hot stamping process to enhance rigidity and strength without increasing component count or weight
Data Source
AI summary
A vehicle body structure includes a dash lower panel including a wheel-arch-shaped portion that constitutes a portion of a wheel arch and separating a power unit chamber from a vehicle interior, a reinforcing panel covering the wheel-arch-shaped portion from a side of the vehicle interior, and a side sill extending in a front-rear direction and having a front end portion connected to an end portion in a vehicle width direction of the dash lower panel. The reinforcing panel includes a horizontal closed cross-section defining portion that defines a closed cross-section extending in the vehicle width direction in combination with the wheel-arch-shaped portion and a vertical closed cross-section defining portion that defines a closed cross-section extending in a vertical direction in combination with the wheel-arch-shaped portion. The horizontal closed cross-section defining portion and the vertical closed cross-section defining portion intersect each other.