Vehicle Front Structure With Inclined Bumper Load Transfer
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Solution Overview
Problem
In existing vehicle front structures, the crash box undergoes bending deformation during a small-overlap collision, preventing it from functioning as a reaction force surface for generating a lateral force, leading to potential damage.
Innovation Solution
A vehicle front structure design that includes a bumper reinforcement with a protruding part having an inclined portion to transmit collision loads to the crash box, reducing damage by allowing it to act as a reaction force surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the crash box is used to absorb collision load through bending deformation, then collision energy is absorbed, but the crash box cannot function as a reaction force surface for generating lateral force
Solution Approach 1:
The invention divides the load absorption function into two separate components: the crushable portion of the bumper reinforcement absorbs collision energy through deformation, while the crash box maintains its structural integrity to serve as a reaction force surface. This segmentation allows each component to perform its specific function without interfering with the other.
Solution Approach 2:
The protruding part with the inclined portion acts as an intermediary element that transfers the collision load from the bumper reinforcement to the crash box in a controlled manner. The inclined surface guides the load transmission path, enabling the crash box to receive force without undergoing damaging bending deformation, thus maintaining its ability to generate lateral reaction force.
2Productivity
If the protruding part directly transmits load to the crash box, then load transmission efficiency is improved, but the crash box suffers damage
Solution Approach 1:
The inclined portion is pre-configured on the protruding part to guide the load transmission path before the collision occurs. This preliminary geometric arrangement ensures that during collision, the load is distributed along the inclined surface, preventing concentrated stress that would cause damage to the crash box while maintaining efficient load transfer.
Solution Approach 2:
The invention changes the geometric parameters of the protruding part by adding the inclined portion, which modifies how the load is transmitted. The inclination angle and surface area of the inclined portion are optimized to distribute the collision load over a larger area of the crash box, reducing stress concentration and preventing damage while maintaining transmission efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively reduces crash box damage and enables stable load transmission, allowing the crash box to generate a lateral force, enhancing collision load management.
Implementation Method 1
the first inclined portion slopes outward from an inner side of the end portion of the protruding part in the vehicle width direction toward the vehicle rear side
Data Source
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AI summary
A vehicle front structure (10) includes: a framework part (16); a crash box (70); a bumper reinforcement (80); a protruding part (82; 100; 200; 300) that protrudes from an end portion of the bumper reinforcement (80) toward a vehicle rear side. An end portion of the protruding part (82; 100; 200; 300) includes a first inclined portion (82E; 100A; 200E; 300D). The end portion of the bumper reinforcement (80) extends along the vehicle width direction so as to project toward the outer side in the vehicle width direction beyond an end portion of the crash box (70). As seen in a plan view, the first inclined portion (82E; 100A; 200E; 300D) slopes outward from an inner side of the end portion of the protruding part (82; 100; 200; 300) in the vehicle width direction toward the vehicle rear side.