Bulkhead Lower Member Extensions for Radiator Support
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Solution Overview
Problem
Existing vehicle-body front structures face challenges in providing adequate rigidity for operation stability, preventing resonance with engine oscillation frequencies, and maintaining a sectional area while avoiding the opening phenomenon and additional parts or manufacturing steps, especially when accommodating varying radiator sizes and engine types.
Innovation Solution
A vehicle-body front structure featuring a rectangular bulkhead with bulkhead side members and a bulkhead lower member that includes extensions hung in the vehicle front-rear direction, forming a closed section with a U-shaped body portion and lid, which supports the radiator at both ends and integrates radiator support portions to enhance rigidity without additional parts, allowing for easy height adjustment and maintaining a recess-free design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the bulkhead lower member is made longer to support larger radiators, then the adaptability increases, but the rigidity decreases and opening phenomenon occurs
Solution Approach 1:
The bulkhead lower member transitions from a one-dimensional linear extension to a two-dimensional L-shaped configuration by adding vertical extensions upward from the horizontal portion. This dimensional change allows the structure to accommodate larger radiator widths while the vertical extensions maintain rigidity by creating a more complex load-bearing path that resists opening phenomenon.
Solution Approach 2:
The bulkhead lower member is segmented into distinct functional portions: a horizontal portion that extends between bulkhead side members to provide width accommodation, and vertical extensions that rise upward to maintain rigidity and prevent opening. This segmentation allows each portion to optimize its function independently.
2Reliability
If additional brackets are added to support the radiator, then the support stability improves, but the device complexity increases
Solution Approach 1:
The bulkhead lower member integrates multiple functions into a single unified structure: it provides radiator support, maintains bulkhead rigidity, and prevents opening phenomenon all through one component. The L-shaped configuration combines the support span function with the rigidity maintenance function, eliminating the need for separate brackets.
Solution Approach 2:
The bulkhead lower member serves multiple purposes simultaneously: it acts as a structural reinforcement element, a radiator support member, and an opening prevention mechanism. This multi-functionality reduces the overall part count while maintaining support stability.
3Strength
If the bulkhead lower member is reinforced to prevent opening phenomenon, then the rigidity improves, but the manufacturing complexity increases
Solution Approach 1:
The bulkhead lower member employs an L-shaped configuration with smooth curved transitions between the horizontal and vertical portions. This curved geometry provides structural reinforcement to prevent opening phenomenon while being manufacturable using standard sheet metal forming processes, avoiding complex multi-step manufacturing procedures.
Data Source
AI summary
A vehicle-body front structure includes a rectangular bulkhead that supports a radiator that is provided in a front part of a vehicle body. The bulkhead includes a pair of bulkhead side members arranged at both sides of the bulkhead and extending in a vehicle up-down direction, and a bulkhead lower member arranged at lower ends of the bulkhead side members and extending in a vehicle width direction. The bulkhead lower member has a smaller length than a distance between the pair of bulkhead side members. The bulkhead lower member includes a pair of extensions being respectively hung between the bulkhead lower member and the bulkhead side members in the vehicle width direction. The bulkhead lower member is joined to inner sides of the pair of extensions such that the extensions are hung in a vehicle front-rear direction.