Vehicle Door Quarter Panel Dynamic Sealing and Ventilation
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Solution Overview
Problem
Frameless window assemblies in vehicles, particularly in sports and grand tourer cars, face issues with misting due to rudimentary ventilation and lack of air conditioning, leading to wind noise and leakage at high speeds due to inadequate sealing between the quarter-light window and the A-pillar, which requires precise manufacturing tolerances to achieve a secure seal.
Innovation Solution
A door assembly with a lowerable quarter panel that can be fitted with an overlapping inverted U-shaped seal on the A-pillar, allowing for a secure seal even at high speeds without requiring extremely close manufacturing tolerances, and enabling easier glass setting and reduced sensitivity to manufacturing variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a fixed frame member is attached to the door running along the top edge of the window assembly, then the window assembly is structurally supported, but the door cannot be opened without interference when the window is in the raised position
Solution Approach 1:
The patent applies the dynamics principle by making the window assembly movable between raised and lowered positions. The window can be dynamically positioned to clear the door seal when the door needs to be opened, eliminating the interference problem while maintaining structural support when raised. The window regulator mechanism enables this dynamic repositioning.
2Reliability
If the quarter panel is fixed and sealed closely to the A-pillar, then a secure seal is achieved, but manufacturing tolerances must be extremely close and the door cannot be opened
Solution Approach 1:
The quarter panel is made dynamically movable rather than fixed. It can be lowered to clear the door seal when opening is required, and raised to engage with the U-shaped seal for effective sealing during vehicle operation. This dynamic capability eliminates the need for extremely close manufacturing tolerances while maintaining sealing reliability.
Solution Approach 2:
The system performs preliminary action by automatically lowering the quarter panel before door opening occurs. The window control system detects the intent to open the door and preemptively positions the quarter panel to clear the seal, preventing interference before it can occur.
3Ease of operation
If the quarter panel is lowered to allow door opening, then ease of operation is improved, but sealing effectiveness at high speed deteriorates
Solution Approach 1:
The quarter panel transitions dynamically between lowered and raised positions based on operational requirements. When door opening is needed, the panel is lowered to clear the seal. When the door is closed and the vehicle is in motion, the panel is raised to engage with the U-shaped seal, ensuring effective sealing at high speeds.
Solution Approach 2:
The window control system automatically manages the quarter panel positioning based on door state and vehicle conditions. The system self-regulates by raising or lowering the panel as needed, eliminating the need for manual intervention and ensuring optimal positioning for both door operation and sealing effectiveness.
4Reliability
If manual tuning steps are performed to adjust seals, then sealing performance is improved, but manufacturing complexity and time increase
Solution Approach 1:
The window control system automatically manages seal engagement by controlling the quarter panel and main window positions. The system self-adjusts to maintain optimal sealing without requiring manual tuning steps, thereby improving manufacturing productivity while maintaining sealing performance.
Solution Approach 2:
The system changes the position parameters of the quarter panel and main window automatically through electronic control. By varying the positional parameters based on operational conditions, the system achieves effective sealing without manual adjustment, streamlining the manufacturing process.
Data Source
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AI summary
A window assembly (118) comprises: a window regulator (144) for driving a main window (124) up and down, a connection system (196) with a latch (198), a division bar (122), and quarter-light window (206) which may be driven down by the regulator (144) to a controlled index position at which the latch (198) disengages such that the quarter-light may be left in a slightly lowered index position while the main window may be further lowered, the latch reengaging once the main window is raised again, the raising and lowering of the quarter-light window (120) enabling the quarter-light to securely engage with a seal (246) positioned between its top edge (204) and an A-pillar (106) of the vehicle (100) and also allowing a door to which the assembly to be opened and closed without interference between the quarter-light and the seal (246).