Vehicle Front Undercover Structure for NV and Steering Rigidity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle front part structures face challenges in achieving both improved noise vibration (NV) performance and steering stability while minimizing the number of components and space occupancy, particularly in vehicles requiring high steering stability and aerodynamic performance.
Innovation Solution
A vehicle front part structure incorporating a one-piece undercover with reinforcing portions, positioned on specific diagonal lines, that integrates with the subframe and shell body to enhance rigidity and reduce vibration transmission, without adding additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the subframe is coupled to the hard body main skeleton, then steering stability is improved, but vibration transmission from road noise to the floor panel increases
Solution Approach 1:
The patent introduces an undercover as an intermediary component between the subframe and the body main skeleton. The undercover is coupled to the subframe at its front side and to the body main skeleton at its rear side, acting as a mediator that decouples the direct vibration transmission path while maintaining structural support. This intermediary structure allows the subframe to be indirectly connected to the body skeleton, reducing vibration transmission to the floor panel while preserving steering stability through the rigid connection path.
2Object-generated harmful factors
If the subframe is coupled to the soft portion under the tunnel, then vibration transmission is reduced, but rigidity at the force application point is lowered
Solution Approach 1:
The patent shifts the coupling arrangement from a direct front-side connection to a rear-side connection of the undercover. By positioning the body main skeleton coupling point at the rear side of the undercover rather than at the front side near the subframe, the structural load path is extended in the longitudinal dimension. This dimensional shift allows the force application point to maintain rigidity through the extended structural path while the soft portion coupling still provides vibration isolation.
3Stability of the object's composition
If additional reinforcing members and connecting members are added to increase rigidity, then steering stability is improved, but the number of components and mass increase
Solution Approach 1:
The patent merges the function of the undercover with the body main skeleton structure by coupling the rear side of the undercover to the body main skeleton. This integration eliminates the need for separate reinforcing members and connecting members that would otherwise be required to provide the same structural support and rigidity. The undercover itself becomes part of the load-bearing structure, reducing the total component count while maintaining steering stability.
Data Source
AI summary
On the first diagonal, the member is arranged in cooperation with the subframe and the undercover. Further, the cover front-side connection portion and the cover rear-side connection portion are located on or near the first diagonal line. Further, the undercover is provided with a reinforcing portion extending on a second diagonal line which is a diagonal line of a quadrangle having a cover front side connecting portion and a cover rear side connecting portion as a top portion. Therefore, the rigidity of the frame front connecting portion can be increased. In this structure, since it is not necessary to provide an additional component different from the undercover, it is possible to eliminate an increase in the number of components due to the additional component and an occupation of space due to the additional component.