Vehicle Front Sub-Frame Impact Absorbing Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In vehicle body front structures, the rear part of the sub-frame deforms significantly during a front collision, causing the high-voltage electric component to be damaged and the engine to potentially deform the dashboard door panel, as the front part of the sub-frame cannot absorb collision energy effectively.
Innovation Solution
A vehicle body front structure with a front sub-frame that includes a gear box at its front part, an arm portion extending forward and outward in the vehicle width direction, an impact absorbing portion supported by the arm, and a horn portion arranged on the front side of the impact absorbing portion to reduce the deformation of the rear part of the sub-frame during a collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the gear box is fitted to the front part of the sub-frame, then the steering stability of the vehicle is improved, but the front part of the sub-frame cannot absorb collision energy effectively, causing the rear part of the sub-frame to deform significantly
Solution Approach 1:
The sub-frame is divided into a front part and a rear part, with the front part specifically designed as a collision energy absorption structure. This segmentation allows the front part to be optimized for energy absorption while the rear part maintains structural strength and component support functions.
Solution Approach 2:
The collision energy absorption function is extracted from the main sub-frame structure and implemented as a separate front part structure. This dedicated absorption structure is positioned at the front to handle collision forces independently, preventing force transmission to the rear part.
2Stability of the object's composition
If the high-voltage electric component is positioned behind the gear box, then the steering stability is improved, but the component is vulnerable to damage when the rear part of the sub-frame deforms during collision
Solution Approach 1:
The front part of the sub-frame is designed as a beforehand cushioning structure that absorbs collision energy before it can reach the rear part and the components positioned there. This prior cushioning protects the high-voltage electric component and other rear components from collision forces.
3Stability of the object's composition
If the engine is fitted to the rear part of the sub-frame, then the steering stability is improved, but the engine may deform the dashboard door panel into the vehicle cabin during collision
Solution Approach 1:
The collision energy absorption function is extracted and assigned to a separate front part structure, preventing the engine and rear components from being involved in collision force absorption. This extraction eliminates the harmful effect of engine intrusion into the vehicle cabin.
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 reduces the deformation of the rear part of the front sub-frame, prevents the high-voltage electric component from being damaged, and disperses the collision load to reduce aggression towards the opponent vehicle, while maintaining airflow and absorption capacity.
Implementation Method 1
an impact absorbing portion supported by the arm portion
Data Source
AI summary
A vehicle body front structure includes a front sub-frame configured such that a gear box is fitted to a front part of the front sub-frame, an arm portion extending from a front part of the front sub-frame forward and outward in a vehicle width direction, an impact absorbing portion supported by the arm portion, and a horn portion arranged on a front side of the impact absorbing portion.