Vehicle Rear Bumper Absorber Rib Design for Impact Energy
Solution Overview
Problem
Current solutions for reducing vehicle vulnerability in low-speed impacts, such as those occurring during parking, require either custom crossmembers or additional damping parts, leading to increased manufacturing costs and complexity.
Innovation Solution
A vehicle rear part design featuring absorbers with protruding ribs interposed between the bumper skin and crossmember, which reduces the distance between the absorber and crossmember, thereby minimizing damage by allowing earlier absorption of impact energy and distributing forces symmetrically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the crosspiece is brought closer to the rear shield by adapting its shape to the shield's curve, then the distance between the crosspiece and shield is reduced, but manufacturing costs increase due to needing specific crossmembers for each vehicle model
Solution Approach 1:
The patent applies universality by designing a standardized crossmember shape that can be used across multiple vehicle models. Instead of creating custom crossmembers for each vehicle model's specific shield curve, the invention uses a universal crossmember design that maintains effectiveness in limiting intrusion distance while reducing manufacturing complexity and costs.
Solution Approach 2:
The patent introduces damping parts as intermediary elements between the crosspiece and the rear shield. These damping parts serve as mediators that enable the crosspiece to be positioned closer to the shield while using a standardized crossmember design, thus achieving reduced intrusion distance without requiring custom-fitted crossmembers for each vehicle model.
2Reliability
If added damping parts are interposed between the crosspiece and the shield, then the damping effect is improved, but manufacturing time and cost increase due to additional parts and installation operations
Solution Approach 1:
The patent merges the damping function with the crosspiece itself by integrating damping parts into the crossmember structure. This combination eliminates the need for separate damping components and their associated installation operations, thereby maintaining effective damping while reducing manufacturing time and assembly complexity.
3Length of stationary object
If the distance between the absorber and crossmember is reduced by adding ribs to the absorber, then the intrusion of external obstacle is limited, but the complexity of the absorber structure increases
Solution Approach 1:
The patent applies segmentation by dividing the absorber structure into modular components with ribs that can be independently configured. The ribs are designed as separate structural elements that can be added to the absorber in a systematic way, allowing the distance reduction function to be achieved through standardized modular additions rather than complex custom shaping.
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 design effectively limits damage to the rear part of the vehicle during low-speed impacts while being cost-effective and easy to implement, reducing manufacturing time and costs by utilizing existing absorbers.
Implementation Method 1
a vehicle rear part comprising a bumper skin, a bumper skirt and a rear cross member placed in front of said bumper skin, characterized in that the skirt is extended by at least one absorber which is interposed between the bumper skin and the crossmember
Data Source
Figure 1~3
Figure 4~6C
AI summary
The invention relates to a rear part (1) of a vehicle comprising a bumper skin (2), a bumper skirt (3) and a rear crossmember (19) positioned in front of said bumper skin (2). The main feature of a rear part of a vehicle according to the invention is that the skirt (3) is extended by at least one absorber (10) which is interposed between the bumper skin (2) and the crossmember (19), said absorber (10) having at least one rib (14, 15, 16, 17) which projects towards said crossmember (19).