Vehicle Substructure Load Path for Offset Collision Rotation Control
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Solution Overview
Problem
Existing vehicle body structures, such as those described in Patent Literature 1, are inadequate in preventing vehicle rotation during offset collisions, as they rely on collapsing members to absorb impact, which can lead to rotation towards the collision opponent.
Innovation Solution
A vehicle body structure featuring side frames, lower members, and a load transmitter system, where the lower member's tip end is connected to the side frame and designed to absorb and distribute collision loads, preventing vehicle rotation by generating a load that separates the vehicle from the collision opponent in the vehicle width direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If members are configured to absorb impact by collapsing in the front-rear direction, then collision safety performance is improved, but vehicle rotation occurs during offset collision
Solution Approach 1:
The patent introduces a new spatial dimension for load transmission by connecting the lower member to the side frame at an angle in the vehicle width direction. This angular connection creates a load path that extends laterally, transforming the purely front-rear collapse mechanism into a multi-directional load distribution system that counters rotational moments during offset collisions
2Reliability
If crash cans are arranged in front of face parts to absorb load, then front collision safety is improved, but inert moment causes vehicle rotation toward collision opponent
Solution Approach 1:
The lower member acts as an intermediary element that bridges the crash can and the side frame. It transmits and redistributes the collision load laterally to the side frame before the inert moment can fully generate rotational force, thereby mediating between the front impact and the vehicle body to prevent rotation
Data Source
AI summary
Included are a side frame extending in a front-rear direction and a lower member located outside the side frame in a vehicle width direction and extending in the front-rear direction. In the lower member, an inward inclined portion approaches the side frame as it goes away from a passenger compartment and a lower tip end portion that is a tip end portion located farthest from the passenger compartment is connected to the side frame.