Vehicle Lower Body Frame With Lateral Impact Absorption Units
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Solution Overview
Problem
Existing vehicle lower body structures face challenges in maintaining the cross-sectional shapes of impact absorption members when subjected to impact loads in the vehicle width direction, leading to reduced energy absorption capacity per unit length.
Innovation Solution
The vehicle lower body structure incorporates closed cross-sectional structural units within the frame, which are designed to compressively deform in the direction of the impact load while maintaining their shape, ensuring impact energy absorption per unit length is maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If impact absorption members extend in the vehicle front-rear direction, then they can be provided inside the rocker, but it becomes difficult to maintain their cross-sectional shapes when subjected to impact loads in the vehicle width direction, reducing impact energy absorption capacity
Solution Approach 1:
The impact absorption members are reoriented to extend in the vehicle width direction instead of the front-rear direction. This dimensional change allows the members to directly resist lateral impact forces while maintaining their cross-sectional integrity during deformation, thereby improving impact energy absorption capacity without compromising shape stability
Solution Approach 2:
The orientation parameter of the impact absorption members is changed from front-rear direction to width direction. This parameter modification enables the members to align with the direction of lateral impact forces, optimizing their ability to absorb impact energy while maintaining structural shape during deformation
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 allows for effective absorption of impact energy per unit length in the vehicle width direction, without compromising the structural integrity or requiring additional space, thus enhancing the vehicle's impact resistance.
Implementation Method 1
the closed cross-sectional structural units compressively deform in the direction in which the impact load was input
Implementation Method 2
the impact absorption member can absorb the impact load and the cross-sectional shapes of inner parts
Data Source
AI summary
A vehicle lower body structure, includes a battery disposed at a vehicle lower side relative to a vehicle cabin; a frame disposed at an outer side, in a vehicle width direction, of the battery, a position in a height direction of a part of the frame overlapping with the battery when viewed in the vehicle width direction; and an impact absorption member provided inside the frame and including closed cross-sectional structural units whose cross-sectional shapes, when viewed in the vehicle width direction, are closed cross-sections, the closed cross-sectional structural units extending in the vehicle width direction.