Vehicle Strut Bar Connecting Bar for Lateral Rigidity
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Solution Overview
Problem
Existing strut bar connection structures in vehicles face issues with reduced lateral rigidity during collisions due to increased angles between strut bars, leading to compromised impact support and excessive dash panel deformation.
Innovation Solution
A connecting bar is introduced between the first and second strut bars, allowing for rotational and sliding movements to prevent angle increase, thereby maintaining support during collisions and distributing load paths effectively, while also reducing dash panel pushback through a slidable design along a longitudinal slot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the angle between the first strut bar and the second strut bar is increased to reinforce lateral rigidity, then lateral rigidity is improved, but impact supporting force deteriorates and dash panel deformation increases during head-on collision
Solution Approach 1:
The connecting bar is designed with rotational capability at its connection points to the strut bars. This dynamic feature allows the connecting bar to rotate during head-on collision, preventing the transmission of excessive impact forces that would otherwise cause dash panel deformation, while still maintaining lateral rigidity through its structural configuration.
Solution Approach 2:
The invention optimizes the angle between the first and second strut bars within a specific range (30° to 60°) to achieve a balance between lateral rigidity and impact supporting force. This parameter optimization ensures that the strut bar assembly provides adequate lateral stability while maintaining sufficient impact resistance during head-on collisions.
2Strength
If the angle between the first strut bar and the second strut bar is reduced to improve impact load path, then impact supporting force is improved, but lateral rigidity deteriorates during broadside collision
Solution Approach 1:
The connecting bar incorporates rotational joints that enable it to adapt its configuration dynamically. During broadside collision, the connecting bar can rotate to maintain an optimal angle with the strut bars, ensuring that lateral rigidity is preserved while still providing adequate impact support through the adjusted geometric configuration.
3Stability of the object's composition
If a rigid connection between strut bars is used to maximize structural stability, then lateral rigidity is maximized, but dash panel pushback increases due to excessive rigidity during collision
Solution Approach 1:
The connecting bar is designed with rotational capability at its connection points, transforming the rigid connection into a dynamic one. This allows the structure to absorb and redistribute collision forces through rotational movement, reducing the transmission of excessive forces to the dash panel while maintaining overall structural stability.
Solution Approach 2:
The rotational capability of the connecting bar acts as a built-in cushioning mechanism that activates during collision. This pre-designed flexibility allows the structure to absorb impact energy through controlled rotation, preventing the transmission of harmful forces to the dash panel before excessive deformation occurs.
Data Source
AI summary
A structure for connecting a strut bar is provided to reinforce lateral rigidity of an engine room of a vehicle. The structure includes a first strut bar that has a first end coupled to a dash panel of a vehicle and a second end coupled to a strut housing and a second strut bar that has a first end coupled to the dash panel and a second end coupled to the first strut bar, and is disposed to have a predetermined angle with respect to the first strut bar. Further, a connecting bar has a first end coupled to the first strut bar and a second end coupled to the second strut bar, and connects the first strut bar and the second strut bar to increase lateral rigidity of a vehicle body, diversify load paths during a collision, and tune a degree to which the dash panel is pushed.