Door Pillar Reinforcement with Nested Inner Profile
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current reinforcement arrangements in door pillars of passenger vehicles are either heavy or lack sufficient rigidity, particularly in the support area, which can lead to excessive deformation during rollovers, compromising passenger safety.
Innovation Solution
Incorporating an inner profile within the reinforcement profile at the support area, formed from semi-finished products with adapted cross-sections, which are connected through a form-fitting process like bending or hydroforming, to enhance stiffness and reduce weight, eliminating the need for additional joints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the reinforcement profile is made thicker and stronger to increase rigidity, then the door pillar rigidity is improved, but the weight of the door pillar increases
Solution Approach 1:
The patent applies local quality by placing an inner profile specifically within the reinforcement profile at the support area where loads are highest, rather than uniformly thickening the entire reinforcement profile. This allows the door pillar to achieve necessary rigidity in critical areas while keeping other areas lighter, thus resolving the contradiction between overall rigidity and weight.
Solution Approach 2:
The patent implements nesting by placing the inner profile inside the reinforcement profile, creating a nested structure where the inner profile is positioned within the cavity of the reinforcement profile. This nested configuration enhances stiffness in the support area without adding the full weight of a completely thicker profile, as the inner profile is contained within the existing outer structure.
2Reliability
If the reinforcement profile wall thickness is increased to prevent excessive deformation, then the structural integrity is improved, but the material usage and weight increase
Solution Approach 1:
The inner profile is positioned specifically at the support area where structural integrity is most critical during rollover events. This localized reinforcement ensures reliability is improved where needed most, while avoiding unnecessary material usage in areas that do not require the same level of strength.
Solution Approach 2:
The reinforcement structure is segmented into an outer reinforcement profile and an inner profile, allowing independent optimization of each component. The inner profile can be specifically designed and positioned to address critical stress areas, improving structural integrity without requiring the entire reinforcement profile to be thicker and thus reducing overall material usage.
3Stability of the object's composition
If a complex connection method with additional joints is used to connect the inner profile to the reinforcement profile, then the structural stability is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the connection function into the forming process itself. The inner profile and reinforcement profile are connected through the forming process (such as hydroforming or bending) that simultaneously creates the form-fitting connection and shapes the components. This eliminates the need for separate jointing operations, maintaining structural stability while reducing manufacturing complexity.
Solution Approach 2:
The connection between the inner profile and reinforcement profile is established during the forming process before final assembly. The form-fitting connection is created in advance as part of the component formation, rather than requiring additional joining steps later. This preliminary action ensures structural stability is achieved without increasing manufacturing complexity.
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 configuration results in a lightweight yet extremely rigid door pillar that optimally withstands loads, particularly in high-stress areas, while maintaining structural integrity and reducing material costs.
Implementation Method 1
connected to one another by further forming—for example by bending along their longitudinal extent
Implementation Method 2
for example by hydroforming—reshaped and thus connected to one another in a form-fitting manner
Data Source
Figure 1~2
Figure 3a~5
AI summary
The invention relates to a reinforcement arrangement (16) inside a cavity (14) of a door pillar (10) of a passenger car, comprising at least one reinforcement profile element (28), which is supported in a lower area by means of a support device (26) of the reinforcement arrangement (16), wherein the reinforcement profile (28) is reinforced in the area of the support device (26) by means of an inner profile element (36) arranged inside the cavity (14) of the reinforcement profile element (28). The invention further relates to a method for producing such a reinforcement arrangement.