Vehicle Front Structure Micro-Wrap Collision Load Path
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Solution Overview
Problem
Existing vehicle front portion structures face challenges in effectively transmitting collision loads during micro-wrap collisions, leading to reduced collision performance due to inadequate load distribution between the front side member and the load-bearing member.
Innovation Solution
A vehicle front portion structure is designed with a load-bearing member that protrudes outward, featuring an inner side collision-absorbing portion and an outer side collision-absorbing portion with varying compression strengths, where the outer side portion is higher, and a closed cross-sectional shape to enhance load transmission and absorption, improving inflection of the front side member during micro-wrap collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a load-bearing member protruding to the vehicle width direction outer side is provided to bear collision loads from micro-wrap collisions, then collision performance with respect to micro-wrap collisions is improved, but the collision load transmitted to the load-bearing member is reduced due to load dispersion through the front side member
Solution Approach 1:
The collision-absorbing member is designed with different compression strengths at different locations: the outer side collision-absorbing portion has higher compression strength than the inner side collision-absorbing portion. This local differentiation ensures that collision loads from micro-wrap collisions are preferentially transmitted to the load-bearing member through the higher strength outer path, while still maintaining overall structural integrity and load distribution.
2Stability of the object's composition
If the front side member inflects to the vehicle width direction inner side to disperse collision loads through the power unit, then collision load dispersion is improved, but the inflection amount is reduced due to load transmission through the collision-absorbing member
Solution Approach 1:
The collision-absorbing member is segmented into two distinct portions: an inner side collision-absorbing portion and an outer side collision-absorbing portion. This segmentation allows each portion to perform different functions - the inner portion allows controlled inflection for load dispersion, while the outer portion provides high-strength load transmission path to the load-bearing member, enabling both inflection and effective load transmission simultaneously.
3Force
If the outer side collision-absorbing portion is made higher in compression strength than the inner side collision-absorbing portion, then collision load transmission to the load-bearing member is improved, but the structural complexity increases
Solution Approach 1:
The inner side collision-absorbing portion and the outer side collision-absorbing portion are merged into a single integrated collision-absorbing member. This merging approach achieves the benefit of differentiated compression strengths through design variations within one component, avoiding the need for separate parts and complex assembly processes, thus reducing overall structural complexity while maintaining the dual-function capability.
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
This configuration efficiently transmits collision loads to the load-bearing member, enhancing collision performance by concentrating the load through the outer side collision-absorbing portion, which results in improved inflection of the front side member towards the vehicle width direction, thus improving micro-wrap collision resistance.
Implementation Method 1
the outer side collision-absorbing portion being higher in compression strength in the vehicle front-and-rear direction than the inner side collision-absorbing portion
Implementation Method 2
collision energy is absorbed by the inner side collision-absorbing portion and the outer side collision-absorbing portion compressively deforming in the vehicle front-and-rear direction
Data Source
AI summary
A vehicle front portion structure includes: a front side member; a load-bearing member provided at an outer side face of a vehicle width direction outer side of the front side member, the load-bearing member including a load transmission portion that protrudes to the vehicle width direction outer side and to a vehicle front from the outer side face; a front bumper reinforcement; an inner side collision-absorbing portion that couples a front end of the front side member with the front bumper reinforcement; and an outer side collision-absorbing portion disposed at the vehicle width direction outer side of the inner side collision-absorbing portion, at least a portion of the outer side collision-absorbing portion being disposed between a front end of the load transmission portion and the front bumper reinforcement, and the outer side collision-absorbing portion being higher in compression strength in the vehicle front-and-rear direction than the inner side collision-absorbing portion.