Active Front Deflector for Vehicle Aerodynamics and Ground Clearance
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Solution Overview
Problem
Conventional vehicle air deflectors fail to provide effective aerodynamics while maintaining ground clearance and durability, especially during off-roading and low-speed maneuvers, as they are either fixed and non-retractable or compromise aerodynamics for various driving conditions.
Innovation Solution
An active front deflector system with a retractable deflector panel and linkage assembly, driven by a clutchable actuator with communication capability, which deploys for improved aerodynamics at higher speeds and retracts for increased ground clearance, preventing damage during impacts and allowing automatic deployment based on vehicle conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed air deflector is used to improve aerodynamics, then vehicle drag is reduced, but ground clearance is compromised during off-roading and low-speed maneuvers
Solution Approach 1:
The air deflector is designed as a movable panel that can transition between deployed and retracted positions. The panel is coupled to a linkage assembly that allows it to move between a first position for aerodynamic efficiency and a second position for increased ground clearance, making the system adaptive to different driving conditions
Solution Approach 2:
The air deflector system is divided into movable panel segments that can be independently positioned. The panel is separated from the fixed vehicle body and connected through a linkage mechanism, allowing selective deployment and retraction of the aerodynamic component without affecting the entire vehicle structure
2Adaptability or versatility
If a retractable deflector panel is implemented, then ground clearance is improved during off-roading, but aerodynamic efficiency is compromised when deployed
Solution Approach 1:
The system dynamically adjusts the deflector panel position based on driving conditions. The panel can be retracted to a second position during off-roading and low-speed maneuvers to maximize ground clearance, then deployed to a first position during normal driving to minimize vehicle drag, optimizing performance for each condition
3Loss of energy
If the deflector panel is made rigid for aerodynamic effectiveness, then aerodynamics are improved, but durability during impacts is reduced
Solution Approach 1:
The rigid panel is coupled to a movable linkage assembly that allows the panel to dynamically adjust its position and absorb impact forces. When an impact occurs, the linkage mechanism allows the panel to move or retract, preventing damage to both the panel and underlying vehicle components while maintaining aerodynamic effectiveness during normal operation
4Reliability
If the actuator is made clutchable with communication capability, then protection from damage is improved, but device complexity increases
Solution Approach 1:
The actuator system incorporates communication capability that provides feedback between the actuator and vehicle systems. This allows the clutchable actuator to receive signals about vehicle conditions and impact forces, automatically engaging or disengaging the clutch mechanism to protect the system while integrating seamlessly with existing vehicle communication networks
Data Source
AI summary
An active front deflector assembly having a deployable deflector panel, linkage assemblies, and an actuator. The system deploys and retracts based on vehicle requirements, and, when deployed, interrupts air flow thereby improving the vehicle aerodynamics, reducing emissions and improving fuel economy. The deflector panel is retractable so the vehicle meets ground clearances, ramp angles, off-road requirements, etc. The deflector panel is also both rigid and semi-rigid to absorb impact energy. The linkage assemblies are coupled to the deflector panel and a drive shaft connected to the actuator. The drive shaft transmits the drive from the actuator coupled to one linkage assembly to the other linkage assembly for moving the deflector panel between the deployed/retracted positions. The actuator is clutched to prevent damage to the system. The active front deflector assembly provides a fully deployable system with object detection, declutching of the actuator, and communication with the vehicle.