Vehicle Cabin Air Filtration Control for Dynamic Recirculation
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Solution Overview
Problem
Current cabin air filtration systems in vehicles lack an efficient method to dynamically adjust the ratio of fresh and recirculated air and optimize air quality based on real-time environmental and vehicle conditions, leading to suboptimal air quality and increased energy consumption.
Innovation Solution
A method that utilizes an electronic control unit and air filter elements with embedded storage means, such as RFID or NFC tags, to retrieve and provide system information for adjusting the air flow and recirculation ratio, determining air quality, and optimizing the operation of the filtration system by linking filtration efficiency, air flow, and air property data to achieve desired air quality standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the air flow magnitude through the air filter device is increased to improve air quality, then the air quality inside the cabin is improved, but the energy consumption of the cabin air filtration system increases
Solution Approach 1:
The patent implements dynamic adjustment of the air flow magnitude through the air filter device based on real-time air quality conditions. The system transitions from static to dynamic operation, allowing the air flow rate to vary according to external air quality measurements and internal cabin conditions, thereby optimizing the balance between air quality improvement and energy consumption.
Solution Approach 2:
The system changes the operational parameters of the air filtration device by adjusting the air flow magnitude and recirculation ratio based on measured conditions. When external air quality is good, the system increases fresh air intake; when pollution is detected, it adjusts the recirculation ratio and filter activation to maintain air quality while reducing energy usage.
2Object-affected harmful factors
If recirculated air is used to enhance air quality inside the cabin, then the air quality is improved, but the service life of the air filter elements may be reduced due to continuous operation
Solution Approach 1:
The system implements periodic adjustment of filter element operation based on air quality conditions. Instead of continuous operation, the filters are activated periodically when external air quality deteriorates, and deactivated or operated at reduced capacity when air quality is good, thereby extending filter service life while maintaining cabin air quality through recirculated air.
Solution Approach 2:
The system applies partial filtration action by selectively activating filter elements based on air quality needs. When external air is clean, the system uses recirculated air with minimal or no filtration; when pollution is detected, filtration is activated at the appropriate level, avoiding excessive filter operation and extending service life.
3Object-affected harmful factors
If multiple filter elements are used to significantly increase air quality, then the air quality is improved, but the device complexity and energy consumption increase
Solution Approach 1:
The air filtration system is segmented into multiple independently controllable filter elements and zones. The system can selectively activate specific filter elements based on air quality conditions and recirculation requirements, rather than operating all filters continuously. This segmentation allows flexible configuration to manage complexity while maintaining effective air quality control.
Solution Approach 2:
The air filter device is designed with multi-functionality, where the same filter elements can serve different purposes: filtering fresh air intake, filtering recirculated air, or operating in bypass mode. This universal design allows the system to achieve high air quality standards with a single integrated device rather than requiring multiple specialized systems, thereby managing complexity.
4Object-affected harmful factors
If the recirculation ratio is dynamically adjusted based on air quality, then the air quality is optimized, but the control system complexity increases
Solution Approach 1:
The system implements feedback control by continuously measuring external air quality parameters and internal cabin air quality, then using this information to dynamically adjust the recirculation ratio. The control system receives feedback from air quality sensors and automatically adjusts the mix of fresh and recirculated air to maintain optimal air quality, balancing automation benefits with control complexity.
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 approach enables precise control of the cabin air filtration system, optimizing air quality, extending the service life of filter elements, and reducing energy consumption by dynamically adjusting the recirculation ratio and using filters only when necessary, ensuring better air quality and efficient operation.
Implementation Method 1
The filter element has a storage means, in particular an RFID tag. A reader for the storage means is arranged in the air filter device. Information retrieved from the RFID tag may be used for determining a remaining service life of the air filter.
Data Source
AI summary
A method for operating a cabin air filtration system of a vehicle includes retrieving, from a storage of a filter element, data comprising information characterizing the filter element, providing system information for the filter element identified by the retrieved data, retrieving current air property data referring to an air property inside and/or outside a cabin, and determining a current air quality information about a current air quality inside the cabin, from the system information for a current magnitude of an air flow, a current recirculation ratio of fresh air and recirculated air and the current air property data.