Vehicle Brace Layout for Dash Cross Member Bending Suppression
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Solution Overview
Problem
The existing vehicle structures fail to effectively transmit loads from the front side members to the rockers during a collision, leading to bending of the dash cross member and subsequent cabin deformation.
Innovation Solution
Incorporating a brace that connects the dash cross member to the floor member behind the dash cross member, with the brace's joint overlapping the joint between the front side member and the dash cross member, to support the dash cross member and prevent bending, allowing for efficient load transmission to the rockers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the dash cross member is joined to the front side member without additional support, then the structure is simple, but the dash cross member bends rearward at the joint when load is applied
Solution Approach 1:
A brace is introduced as an intermediary component between the dash cross member and the floor member. This brace provides additional support at the joint location where the front side member connects to the dash cross member, preventing rearward bending while maintaining structural simplicity through strategic placement rather than complex design
2Object-affected harmful factors
If the dash cross member bends rearward at the joint, then the structure absorbs some impact, but the load cannot be sufficiently transmitted to the rocker
Solution Approach 1:
The brace acts as a mediator that maintains the geometric relationship between the dash cross member and the floor member during impact. By preventing excessive rearward bending at the joint, the brace ensures that the load path from the front side member through the dash cross member to the rocker remains intact and efficient
3Device complexity
If the brace is positioned away from the joint between the front side member and dash cross member, then the brace structure is simple, but the bending at the joint is not effectively suppressed
Solution Approach 1:
The brace is strategically positioned to overlap the joint between the front side member and the dash cross member in the vehicle width direction. This localized placement at the critical joint area provides maximum bending suppression effectiveness without requiring the brace to extend throughout the entire structure
Data Source
AI summary
A vehicle includes a dash cross member extending along a vehicle width direction, a front side member arranged in front of the dash cross member and joined to the dash cross member, a floor member arranged behind the dash cross member, and a brace joined to the dash cross member and joined to the floor member. A joint between the brace and the dash cross member overlaps a joint between the front side member and the dash cross member in the vehicle width direction. The brace includes an extending portion. The extending portion is joined to the floor member.