Movable A-Pillar Fin for Vehicle Aerodynamics and Rain Protection
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Solution Overview
Problem
Existing gutter channels on vehicles disrupt the smooth exterior surface, reducing aerodynamics, while they effectively prevent rain from reaching side windows during rainy conditions.
Innovation Solution
A fin assembly supported on the A-pillar, which can be retracted or extended to maintain an aerodynamic shape and prevent liquid from reaching the side windows, using a mechanism that includes a motor and arm system to adjust its position based on detected rain levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If known gutter channels are formed from static incongruities in paneling to prevent rain from reaching side windows, then rain prevention is improved, but aerodynamic shape is worsened due to disruption of smooth exterior surface
Solution Approach 1:
The fin assembly is made movable between a retracted position (flush with A-pillar for aerodynamics) and an extended position (protruding to prevent rain). The motor-driven mechanism allows the fin to dynamically adjust its position based on driving conditions, resolving the contradiction between maintaining smooth aerodynamic surfaces and preventing rain from reaching side windows.
Solution Approach 2:
The fin assembly changes its positional parameter relative to the A-pillar, transitioning from a retracted state where it conforms to the aerodynamic shape to an extended state where it protrudes to block rain. This parameter change enables the system to adapt to different environmental conditions while maintaining optimal aerodynamics when not in use.
2Shape
If a movable fin assembly is added to maintain aerodynamic shape while preventing rain, then aerodynamic shape is improved, but device complexity is worsened due to additional mechanisms
Solution Approach 1:
The fin assembly incorporates a motor-driven movable mechanism that transitions between retracted and extended positions. This dynamic capability allows the system to maintain aerodynamic efficiency during normal driving while providing rain protection when needed, justifying the added complexity through functional adaptability.
Solution Approach 2:
The fin assembly serves multiple functions: maintaining aerodynamic shape when retracted and preventing rain from reaching side windows when extended. This multi-functionality consolidates what would otherwise require separate systems into a single integrated component, managing complexity through functional consolidation.
3Object-affected harmful factors
If the fin is extended to prevent liquid from traveling around the A-pillar, then rain prevention is improved, but aerodynamic efficiency is worsened due to disruption of smooth exterior surface
Solution Approach 1:
The fin assembly dynamically adjusts its position based on environmental conditions. During rainy conditions, it extends to block liquid flow around the A-pillar. During normal conditions, it retracts to maintain smooth exterior surfaces and optimal aerodynamic efficiency, eliminating unnecessary energy loss.
Solution Approach 2:
The fin assembly operates periodically, transitioning between extended and retracted states based on detected rain conditions. This periodic adjustment ensures aerodynamic efficiency is maintained during dry periods while providing protection during rainy periods, optimizing the balance between protection and energy efficiency.
Data Source
AI summary
A fin assembly of a vehicle includes a fin supported on an A-pillar and disposed along the A-pillar at a location that is interposed between and separates a side window and a windshield in a lateral direction of the vehicle. The fin is configured for being driven to a retracted condition with respect to the A-pillar where an exterior surface of the vehicle at least partially formed along an exterior surface of the windshield, an exterior surface of the fin, and an exterior surface of the side window substantially conforms to an aerodynamic shape, and for being driven to an extended condition where the exterior surface of the vehicle is at least partially formed along the exterior surface of the windshield, an exterior surface of the A-pillar located behind the fin in a front-back direction of the vehicle, and the exterior surface of the side window.