Bumper Reinforcement Breakage Layout for Center Pole Collisions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In vehicles equipped with a bumper reinforcement structure, center pole collisions often result in the bumper reinforcement breaking at the vehicle width direction center position, concentrating the load on the power unit, which can lead to inadequate dispersion of the collision load in the vehicle width direction.
Innovation Solution
A vehicle front structure design featuring a bumper reinforcement with strategically positioned breakage initiation points and a cross-sectional collapse prevention member, where the first breakage initiation point has lower bending yield strength than other regions, allowing it to break first during a center pole collision, and the second breakage initiation point has higher bending yield strength, dispersing the collision load across the vehicle width direction, while a cross-sectional collapse prevention member inside the bumper reinforcement at the vehicle width direction center position prevents crushing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bumper reinforcement is made with uniform strength, then the structure is simple to manufacture, but the load cannot be effectively dispersed during center pole collision
Solution Approach 1:
The bumper reinforcement employs varying bending yield strengths at different locations: the first breakage initiation point has the lowest bending yield strength to break first and disperse load, the second breakage initiation point has intermediate strength to break subsequently, and other regions maintain higher strength for structural support. This local differentiation of material properties enables effective load dispersion during center pole collision while maintaining manufacturability through controlled variation in bending yield strength across the bumper reinforcement structure.
2Strength
If the bumper reinforcement has high bending yield strength throughout, then structural integrity is maintained, but the bumper cannot break to disperse collision load
Solution Approach 1:
The bumper reinforcement features localized regions with reduced bending yield strength (first and second breakage initiation points) positioned at specific locations, while other regions maintain higher bending yield strength for structural support. This local differentiation allows the bumper to break at controlled points during collision to disperse load, while maintaining overall structural integrity through the higher strength regions that prevent complete structural failure.
Data Source
AI summary
A vehicle front structure including a left and right pair of front side members, a bumper reinforcement and a power unit. The bumper reinforcement includes a first breakage initiation point at a position at one vehicle width direction side relative to a vehicle width direction center position of the vehicle, and a second breakage initiation point at a position at the other vehicle width direction side. The first breakage initiation point is a region at which bending yield strength is lower than other regions of the bumper reinforcement. The second breakage initiation point is a region with lower bending yield strength than the other regions but higher bending yield strength than the first breakage initiation point. The bumper reinforcement includes a bumper reinforcement main body with a chamber structure and a bracing member inside the bumper reinforcement main body at the vehicle width direction center position of the vehicle.