Dual Roll Shutter Apparatus for Vehicle Grille Sealability
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Solution Overview
Problem
Existing vehicle grill systems face issues with air resistance and cooling efficiency due to air leaks between flaps and slow operation of single roll screens, which can lead to thermal damage and durability problems.
Innovation Solution
An active dual roll shutter apparatus using two roll screens operated in opposite directions by a single motor, with lead screws and power transmission mechanisms to quickly open or close the flow path, improving sealability and reducing air resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single roll screen is used to open or close the flow path, then the structure is simple, but a considerable amount of time is required to open or close the roll screen
Solution Approach 1:
The single roll screen is divided into two separate roll screens (first roll screen and second roll screen). Each roll screen is independently controlled by its own lead screw mechanism, allowing them to operate simultaneously and reduce the time required to open or close the flow path while maintaining structural simplicity.
2Speed
If a motor that operates at a high speed is used to increase the operating speed of the roll screen, then the operating speed increases, but the unit price increases and the roll screen may be torn or operating components may be damaged
Solution Approach 1:
The load is divided between two roll screens operating simultaneously, reducing the speed and force requirements for each individual screen. This allows the use of lower-powered motors that operate more reliably without risking damage to the roll screens or components, while still achieving fast overall operation through parallel action.
3Device complexity
If a plurality of flaps is used to open or close the flow path, then the structure is simple, but air leaks through gaps between the flaps causing deterioration in aerodynamic force
Solution Approach 1:
The invention uses roll screens made of flexible mesh material that can completely seal the flow path when closed, eliminating air leakage gaps that occur with rigid flap structures. The flexible nature of the roll screens allows them to conform to the housing and provide complete sealing while maintaining a relatively simple overall structure.
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
The apparatus significantly reduces the time required to open or close the flow path, enhances aerodynamic performance, and minimizes costs and component durability issues, while maintaining a compact design.
Implementation Method 1
two lead screws 10, each having a first screw thread 11 and a second screw thread 12 formed in opposite directions from one end and the other end thereof to a middle point thereof in a longitudinal direction
Data Source
AI summary
An active dual roll shutter apparatus for a vehicle has two lead screws rotated by power from a single motor. First and second roll screens are simultaneously operated upward and downward in opposite directions along the two lead screws to open a flow path when the lead screws rotate, thereby improving sealability of the flow path and aerodynamic performance of the vehicle.