Active Front Deflector with Retractable Blade for Aerodynamic Drag Reduction
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Solution Overview
Problem
Conventional vehicle air deflectors fail to optimize aerodynamics due to fixed designs that compromise vehicle capabilities and are prone to damage during off-roading or increased ground clearance, leading to inefficiencies in airflow and drag reduction.
Innovation Solution
An active front deflector assembly with a cross member and actuator link assembly, including a rotary actuator, four-bar linkage, and a retractable blade, allowing for adjustable deployment and retraction to enhance aerodynamics while preventing damage during impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed air deflector is used to improve aerodynamics, then drag reduction is achieved, but the vehicle cannot adapt to off-roading or increased ground clearance conditions
Solution Approach 1:
The air deflector is designed as a movable component that can dynamically adjust its position between extended and retracted states. The blade is connected through a four-bar linkage mechanism with an actuator, allowing it to change position based on driving conditions, thus providing both aerodynamic efficiency during normal driving and adaptability during off-roading.
Solution Approach 2:
The system changes the positional parameter of the air deflector blade to adapt to different operating conditions. When in the extended position, the blade provides optimal aerodynamic drag reduction; when retracted, it allows increased ground clearance and adaptability for off-road conditions.
2Loss of energy
If a fixed air deflector is used to reduce drag, then fuel consumption is improved, but the deflector is damaged during off-roading or when ground clearance is needed
Solution Approach 1:
The air deflector transitions from a static fixed structure to a dynamic movable component. The blade can be retracted via the actuator mechanism when off-road conditions are detected, preventing damage while maintaining aerodynamic efficiency during normal road conditions, thus improving both fuel consumption and reliability.
Solution Approach 2:
The system proactively retracts the blade before potential impact during off-roading conditions. The controller detects off-road scenarios and commands the actuator to retract the blade in advance, cushioning against potential damage before it occurs.
3Reliability
If an active front deflector is made retractable to prevent damage, then reliability is improved, but the structure becomes more complex
Solution Approach 1:
The system employs a four-bar linkage mechanism with an actuator to enable controlled movement of the blade. This mechanical linkage provides reliable motion control with relatively simple components, achieving damage protection through controlled retraction while minimizing the increase in structural complexity.
Data Source
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AI summary
An active front deflector assembly for a vehicle capable of moving between an extended position and a retracted position or any position there between. The active front deflector assembly has a cross member for attaching to an underbody of a vehicle. The frame member also includes a plurality of slip joint connections for connecting to the underbody of the vehicle. The cross member is a fixed link of an actuator link assembly that has an actuator, drive link, floating link and a blade.