Shape-Memory Airflow Flap for Simplified Vehicle Cooling Control
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Solution Overview
Problem
Existing devices for regulating cooling air flow in vehicle compartments, such as the engine compartment, are inefficient due to their reliance on complex electrohydraulic or electromechanical activating mechanisms, which are cumbersome and not structurally simple.
Innovation Solution
A device utilizing a drive module with a shape-memory alloy actuator that applies a thrust force based on temperature changes to move a wing between open and closed positions, coupled with a transmission apparatus to control air flow, eliminating the need for complex activating systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cooling air flow regulator is integrated into the air intake system, then the cooling air flow can be regulated independently from the air supply to the combustion chambers, but the device complexity increases due to additional components and integration requirements
Solution Approach 1:
The regulator is integrated directly into the air intake system structure, merging the cooling air regulation function with the existing air intake components. This allows independent control of cooling air flow while utilizing the existing air intake infrastructure, thereby reducing the need for separate standalone regulation systems.
Solution Approach 2:
The air intake system is designed to serve multiple functions: supplying air to combustion chambers and providing regulated cooling air to the exhaust brake system. This multi-functionality allows the system to regulate cooling air independently without requiring a completely separate system, thus managing complexity while achieving adaptability.
2Volume of moving object
If the regulator is integrated into the air intake system, then the structure is more compact, but the manufacturing precision requirements increase
Solution Approach 1:
The regulator is designed as a modular component that can be integrated into the air intake system at specific locations. This segmentation allows for standardized manufacturing of the regulator unit itself, while the integration points are designed with tolerance considerations, balancing compactness with manufacturability.
3Ease of operation
If additional components are added to the air intake system for regulation, then the cooling air flow control is improved, but the loss of energy increases due to additional pressure drops
Solution Approach 1:
The regulation mechanism replaces complex mechanical flow control systems with a simpler design that utilizes the existing air intake flow dynamics. The regulator is positioned to take advantage of the natural pressure differentials in the air intake system, reducing the need for additional energy-consuming components while maintaining effective cooling air flow control.
Data Source
Figure 1
Figure 2A~2B
AI summary
A device for controlling a hot air flow, for example in an engine compartment of a motor car, comprises at least one wing (2) connectable to an air inflow opening of an engine compartment of a motor car and movable between a position for closing and a position for opening the air inflow opening; a drive module (3) configured to apply a predetermined thrust force and a transmission apparatus (4) capable of transmitting the thrust force from the drive module (3) to the wing (2) to move the wing from the closed position to the open position and vice versa. The drive module (3) comprises at least one actuator (5) made of a shape- memory alloy such that the thrust force is applied when the actuator (5) reaches a predetermined temperature.