Vehicle Front Crossmember Layout for Offset Collision Load Transfer
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Solution Overview
Problem
Existing vehicle front section structures struggle to effectively transmit collision loads from an offset collision to the opposite side of the vehicle, resulting in inadequate reaction forces to displace the vehicle away from the collision object.
Innovation Solution
A vehicle front section structure featuring a left-right pair of framework members spaced apart in the vehicle width direction, connected by a connection member with a main body extending in the vehicle width direction, and front and rear connection portions that extend outward in the vehicle width direction, allowing for diagonal transmission of collision loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the connection member has straight connection portions parallel to the vehicle width direction, then the structure is simple, but the reaction force in offset collision is insufficient
Solution Approach 1:
The connection member employs asymmetric connection portions that extend obliquinely relative to the vehicle width direction, creating diagonal load transmission paths. This asymmetric configuration optimizes the reaction force generation during offset collisions by directing forces at specific angles, resolving the contradiction between structural simplicity and force effectiveness.
Solution Approach 2:
The connection portions are extended in oblique directions rather than strictly parallel to the vehicle width direction, introducing diagonal dimensions to the force transmission path. This dimensional change enables more effective reaction force generation in offset collision scenarios while maintaining reasonable structural complexity.
2Force
If the connection member transmits load directly across the vehicle width, then the load transmission path is short, but the reaction force causing vehicle displacement is insufficient
Solution Approach 1:
The load transmission path is extended by introducing oblique connection portions that create diagonal force transmission routes. This extends the effective length of the load path in three-dimensional space, enabling greater reaction force generation while the projection on the vehicle width direction remains compact.
Solution Approach 2:
The connection member incorporates curved or inclined geometries in its connection portions, allowing the load to travel along extended oblique paths. This curved configuration increases the effective load transmission length and improves reaction force generation without significantly increasing the overall width occupation.
Data Source
AI summary
A vehicle front section structure including: a left-right pair of framework members disposed spaced apart from each other in a vehicle width direction at a vehicle front side of a cabin; and a connection member connecting the left-right pair of framework members together. The connection member includes: a main body extending in the vehicle width direction; a left-right pair of front connection portions respectively connecting end portions of the main body to the framework members and extending toward a front side and toward an outer side in the vehicle width direction; and a left-right pair of rear connection portions respectively connecting the end portions of the main body to the framework members and extending toward a rear side and toward an outer side in the vehicle width direction.