Vehicle Body Structure for Small Overlap Crash Load Distribution
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Solution Overview
Problem
Current vehicle body reinforcement methods for small overlap crashes can lead to increased passenger injuries due to rapid vehicle rotation and limited protection for the powertrain area, as they primarily focus on reinforcing the A-pillar and side periphery.
Innovation Solution
A vehicle body structure featuring extended front side members, a sub-frame with cross members, fender apron members, load distribution members, a cross bar, and a bulkhead that distributes loads to enhance strength and prevent deformation, allowing the vehicle to maintain forward movement without turning during a small overlap crash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the A-pillar and side seal periphery are reinforced to increase safety in small overlap crash, then the strength of the vehicle body is improved, but the vehicle experiences rapid turning around the collision portion causing increased injury to passenger neck and chest
Solution Approach 1:
The vehicle body structure is divided into multiple load-bearing segments including front side members, sub-frame with cross members, fender apron members, load distribution members, and a bulkhead. This segmentation distributes the collision load across multiple structural elements rather than concentrating it on the A-pillar alone, preventing rapid vehicle rotation and reducing passenger injury while maintaining overall body strength.
2Strength
If only the side portion of the vehicle body adjacent to the passenger compartment is reinforced, then the strength of the passenger compartment is improved, but the protection of the power train room located in front of the passenger compartment is limited
Solution Approach 1:
The front side members, sub-frame, and load distribution members serve multiple functions simultaneously: they strengthen the passenger compartment while also protecting the power train room. The bulkhead specifically bridges these two areas, distributing loads to provide comprehensive protection for both regions, making the structural elements universal in their protective function.
3Strength
If the A-pillar and side seal periphery are reinforced, then the vehicle body strength is improved, but the complexity of the vehicle body structure increases
Solution Approach 1:
Multiple structural components (front side members, sub-frame, fender apron members, load distribution members, and bulkhead) are merged into an integrated load-bearing system. This combination creates a unified structure that distributes collision loads efficiently across the front portion of the vehicle, achieving enhanced strength without proportionally increasing complexity, as the components work together as a cohesive system.
Data Source
AI summary
A vehicle body structure may include: front side members extended in a longitudinal direction of the vehicle and provided at opposite sides of the vehicle body structure; a sub-frame that includes: a front cross member and a rear cross member, which are spaced apart from each other, and front side structures extending forward from opposite sides of the sub-frame, where the sub-frame is coupled to the front side members at opposite sides; fender apron members to connect the front side structures to A-pillars of the vehicle body structure; load distribution members coupled to the fender apron members to transmit a load to the fender apron members and to the front side members; and a cross bar extending in the transverse direction while being spaced apart from an upper side of the front cross member of the sub-frame, and having opposite ends coupled to the front side members.