Vehicle Cooling Shutter Control for Fuel Efficiency
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Solution Overview
Problem
Conventional vehicle cooling systems reduce fuel efficiency due to increased air resistance when the shutter is opened for cooling, and closing it completely prevents heat exchanger unit cooling, leading to a trade-off between air resistance and cooling efficiency.
Innovation Solution
A cooling system with a control unit that performs inside air cooling control by driving the fan while the shutter is closed, reducing the frequency of opening the shutter and maintaining heat exchanger unit cooling, thereby minimizing air resistance and enhancing fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the shutter is opened to cool the heat exchanger unit, then cooling efficiency is improved, but air resistance increases and fuel efficiency deteriorates
Solution Approach 1:
The shutter is made dynamically controllable with multiple opening degrees (fully open, partially open, fully closed) rather than being static. The control unit adjusts the shutter position based on real-time conditions including heat radiation index, vehicle speed, and ambient temperature, allowing the system to optimize the balance between cooling efficiency and air resistance dynamically during vehicle operation
Solution Approach 2:
The system changes the operating parameters of the cooling system by using both shutter position and fan operation speed as controllable variables. By adjusting the fan speed and shutter opening degree in combination, the system can achieve effective cooling with reduced air intake, thereby reducing air resistance and improving fuel efficiency while maintaining heat exchanger performance
2Loss of energy
If the shutter is closed to reduce air resistance, then fuel efficiency is improved, but heat exchanger unit cooling is prevented
Solution Approach 1:
The fan acts as an intermediary device that enables cooling function even when the shutter is closed or partially closed. By using the fan to force air through the heat exchanger unit, the system can maintain cooling effectiveness without relying solely on natural air flow through an open shutter, thus reducing air resistance while preventing overheating
Solution Approach 2:
The system dynamically switches between different cooling modes: using shutter opening for natural convection cooling when high cooling is needed, and using fan-driven cooling with closed or partially closed shutter when lower cooling is sufficient or when fuel efficiency is prioritized. This dynamic mode switching resolves the contradiction between shutter closure and cooling effectiveness
3Temperature
If the fan is operated continuously to cool the heat exchanger unit, then cooling efficiency is improved, but energy consumption increases
Solution Approach 1:
The fan operates periodically rather than continuously, being activated only when the control unit determines cooling is needed based on monitored parameters such as heat radiation index, vehicle speed, and ambient temperature. This periodic operation reduces overall energy consumption while maintaining adequate cooling performance
Solution Approach 2:
The control unit uses feedback from temperature sensors and other monitoring devices to determine when fan operation is necessary. By continuously monitoring the heat exchanger unit temperature and environmental conditions, the system activates the fan only when cooling demand exceeds natural convection capability, optimizing the balance between cooling efficiency and energy consumption
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
The system reduces the frequency of opening the shutter, thereby enhancing fuel efficiency by maintaining heat exchanger unit cooling without increasing air resistance, even when the shutter is closed, thus improving overall vehicle performance.
Implementation Method 1
a heat exchanger unit configured to cool a heat medium by heat exchange with air
Implementation Method 2
a fan configured to send air to flow through the heat exchanger unit
Data Source
AI summary
A cooling system for a vehicle includes a heat exchanger unit which cools a heat medium by heat exchange with air, a fan which sends air to flow through the heat exchanger unit, and a shutter which switches between an opening and a closing of a pathway through which air flows from an outside toward the heat exchanger unit. A control unit controls operations of the fan and the shutter, an index acquisition unit acquires a heat radiation index showing a magnitude of a radiation amount required in the heat exchanger unit, and a fixing determination unit determines whether the shutter is closed and fixed. The control unit performs a control in which the fan is driven while the shutter is closed, when the heat radiation index is equal to or lower than a predetermined threshold.