Active Underbody Airflow Management for Vehicle Cooling
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Solution Overview
Problem
Current vehicle aerodynamic systems fail to efficiently manage airflow into the under-hood compartment, leading to suboptimal cooling and performance, particularly under varying engine loads, as they rely on fixed grille openings and lack adaptive control mechanisms.
Innovation Solution
The implementation of an active underbody arrangement featuring aerodynamic members with adjustable shutter assemblies and airflow management devices, controlled by a mechanism and controller, to dynamically regulate airflow into the under-hood compartment, optimizing cooling based on engine load and aerodynamic needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fixed grille openings are used for airflow management, then the structure is simple and easy to manufacture, but the cooling efficiency is insufficient under varying engine loads
Solution Approach 1:
The patent applies dynamics by replacing fixed grille openings with adjustable shutter assemblies that can dynamically change their opening area. The shutters are controlled by actuators (electric motors, pneumatic cylinders, or hydraulic systems) that adjust the grille opening area in real-time based on engine load conditions, thereby optimizing cooling efficiency across different operating scenarios while maintaining a relatively simple overall structure.
2Adaptability or versatility
If adjustable shutter assemblies are implemented, then cooling efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback control by using sensors (such as temperature sensors or engine load sensors) to monitor engine operating conditions and feed this information to a controller. The controller then adjusts the shutter assembly opening area accordingly, creating a closed-loop control system that optimizes cooling efficiency while managing complexity through intelligent control rather than mechanical complexity.
Solution Approach 2:
The shutter assembly design integrates multiple functions into a single component: it serves as both the airflow regulation mechanism and the structural element of the grille. The actuator mechanisms are integrated within the grille structure itself, and the control system can serve multiple vehicle functions (cooling, aerodynamics, noise reduction), thereby reducing overall system complexity despite the added adjustability.
3Temperature
If airflow is increased for cooling, then engine cooling is improved, but vehicle drag increases
Solution Approach 1:
The patent resolves this contradiction through dynamic adjustment of the shutter assemblies based on real-time engine load conditions. During high-load operations when cooling demand is high, the shutters open to increase airflow. During low-load or cruising conditions when cooling demand is low, the shutters close to reduce drag. This dynamic adaptation allows the system to optimize the trade-off between cooling efficiency and aerodynamic drag across different operating scenarios.
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
This solution enhances vehicle performance by adjusting airflow to meet cooling demands, reducing drag, noise, and improving traction and cornering abilities while maintaining optimal engine operation across different loads.
Implementation Method 1
The at least one aerodynamic member includes a housing and an airflow management device provided in an opening in the housing. The airflow management device is selectively positioned to direct the airflow from the front end of the vehicle into the under-hood compartment
Data Source
AI summary
A vehicle includes a vehicle body having a first end configured to face oncoming airflow when the vehicle is in motion relative to a road surface and an opposing second end and an under-hood compartment provided in the first end of the vehicle body. An underbody extends between the first and second ends of the vehicle body and defines a space between the vehicle body and the road surface. At least one aerodynamic member is disposed adjacent a forward portion of the underbody and proximate to the under-hood compartment. The at least one aerodynamic member includes a housing and an airflow management device provided in an opening in the housing. The airflow management device is selectively positioned to direct the airflow from the front end of the vehicle into the under-hood compartment to improve vehicle performance.