Vehicle Engine Airflow Control via Rotary Shutter and Flaps
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Solution Overview
Problem
Traditional methods for controlling air flow into a vehicle engine room, such as mechanically operated cooling fans, lead to reduced fuel efficiency due to constant operation and increased drag, affecting both cooling and aerodynamic performance.
Innovation Solution
A system that includes an air intake port, air ducts, a control valve, and a control unit that adjusts air flow based on vehicle operating states, using a rotary shutter and flaps to optimize air distribution between the radiator and engine room, reducing air flow when not needed to improve aerodynamics and enhance cooling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling fan is always operated when the engine is operated, then the cooling performance is maintained, but the fuel efficiency deteriorates
Solution Approach 1:
The cooling fan operation is made dynamic rather than constant. The control unit activates the cooling fan only when cooling is actually needed, based on real-time monitoring of engine temperature and vehicle operating conditions. This dynamic control strategy eliminates unnecessary fan operation during normal driving, thereby improving fuel efficiency while maintaining adequate cooling performance when required.
Solution Approach 2:
The system changes the operational parameters of the cooling fan from continuous operation to conditional operation. By monitoring engine temperature parameters and vehicle speed parameters, the control unit adjusts the fan's operational state (on/off or variable speed), optimizing the balance between cooling performance and energy consumption based on actual thermal conditions.
2Temperature
If air flows through the engine room at high vehicle speed, then the cooling of engine components is enhanced, but drag is generated reducing aerodynamic performance
Solution Approach 1:
The air intake system employs dynamic control through adjustable flaps and shutters that can change their opening degree based on vehicle speed and cooling requirements. At high vehicle speeds, when natural ram air cooling is sufficient, the flaps close to minimize air intake and reduce drag. When additional cooling is needed, the flaps open to allow air flow, thus dynamically balancing cooling performance and aerodynamic efficiency.
Solution Approach 2:
The system changes the air flow parameters by adjusting the opening degree of intake flaps and shutters. By varying these parameters according to vehicle speed and engine temperature conditions, the system optimizes the trade-off between cooling performance and aerodynamic drag, allowing minimal air intake during high-speed cruising while ensuring adequate cooling when necessary.
3Temperature
If the air intake port supplies air directly into the engine room, then the cooling is effective, but the aerodynamic characteristic deteriorates
Solution Approach 1:
The air intake system is segmented into multiple controllable zones with separate flaps and shutters for different intake ports. This segmentation allows selective closure of specific air intake paths while maintaining others open, enabling precise control over air flow patterns. By closing unnecessary intake paths during high-speed operation, the system reduces aerodynamic disruption while maintaining cooling effectiveness through targeted air supply to critical areas.
Solution Approach 2:
Different portions of the air intake system are given different functional qualities through local control mechanisms. Specific flaps and shutters are positioned to control air flow to particular engine compartments or components based on their cooling requirements. This local quality approach allows the system to maintain aerodynamic efficiency by closing external intake paths while still providing adequate cooling to internal components through selectively opened passages.
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 system improves fuel efficiency by selectively operating the cooling fan and adjusting air flow, reducing drag and enhancing both cooling and aerodynamic performance by optimizing air distribution based on vehicle speed and load conditions.
Implementation Method 1
a control valve configured to selectively convey the air flowed in the air intake port into the air ducts; the control valve having one end which may be fixed at a valve shaft formed at interior circumference of the diversion passage and the other end configured to rotate in a forward and reverse directions such that the diversion passage is selectively opened or closed
Implementation Method 2
air ducts formed at both sides of the air intake port and introduce the exterior air into a wheel side in order to improve aerodynamic characteristic
Implementation Method 3
a radiator disposed between the air intake port and the engine room
Data Source
AI summary
The present disclosure relates to a system for controlling an air flow rate into a vehicle engine room. The system includes: an air intake port receiving an exterior air at a front portion of the vehicle and supplying the air into the engine room; air ducts formed at both sides of the air intake port and introduce the exterior air into a wheel side in order to improve aerodynamic characteristic; a control valve configured to selectively convey the air flowed in the air intake port into the air ducts; a radiator disposed between the air intake port and the engine room; and a control portion configured to control the control valve based on an operating state of vehicle. The air ducts are selectively communicated with the air intake port and disposed at upstream of the radiator.