Filter Restriction Indicator Using Pressure Sensing for Life Prediction
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Solution Overview
Problem
Existing filter restriction indicators for air filtration systems in internal combustion engines lack effective mechanisms to accurately monitor airflow restriction and predict remaining filter life, often relying on mechanical diaphragms and electromechanical sensors that are prone to vibration-induced errors and do not provide comprehensive feedback on filter health and unauthorized filter cartridges.
Innovation Solution
A filter restriction indicator featuring an electronics control cartridge with a pressure sensor, circuit boards, and a breather filter, which includes a cap with a shielding panel and snap-fit mechanisms for secure assembly, providing accurate pressure differential measurements and wireless communication for real-time filter status monitoring and predictive maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If mechanical diaphragms and electromechanical sensors are used to monitor airflow restriction, then the device structure is simple, but the measurement accuracy deteriorates due to vibration-induced errors
Solution Approach 1:
The patent replaces mechanical diaphragms and electromechanical sensors with a pressure sensor that directly measures pressure differential across the air filter. This eliminates mechanical moving parts that are susceptible to vibration-induced errors, thereby improving measurement accuracy while maintaining relatively simple device structure.
2Device complexity
If traditional filter restriction gauges are used, then the device is simple, but the ability to predict remaining filter life deteriorates
Solution Approach 1:
The patent incorporates a microcontroller that processes pressure differential data from the pressure sensor and provides feedback regarding filter loading status and predicts remaining filter life. This feedback mechanism enables proactive maintenance scheduling based on actual filter condition rather than simple restriction indication.
3Ease of manufacture
If no protective shielding is provided, then the device assembly is simple, but the sensor is vulnerable to contamination from corrosive gases and fluids
Solution Approach 1:
The patent introduces a shielding panel as an intermediary protective element positioned between the pressure sensor and the external environment. This shielding panel protects the sensor from corrosive gases and fluids while allowing pressure measurements to pass through, thus protecting the sensor without significantly complicating the assembly process.
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
Enhances the accuracy and reliability of airflow restriction monitoring and filter life prediction, while preventing contamination and ensuring compatibility with various filtration systems, thereby improving engine performance and reducing maintenance costs.
Implementation Method 1
A filter restriction indicator featuring an electronics control cartridge with a pressure sensor... providing accurate pressure differential measurements
Data Source
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AI summary
Embodiments herein relate to filter restriction indicator (100) for a filtration system. In an embodiment, a filter restriction indicator (100) can have an electronics control cartridge (800) including an internal spacer frame (304), a first circuit board (346), a second circuit board (302) disposed over the first circuit board (346), and a pressure sensor (336) in electrical communication with the first circuit board (346). A filter fluid tube (318) defines a filter fluid channel (348) in fluid communication with the pressure sensor (336). The internal spacer frame (304) can secure the first circuit board (346) at a fixed distance from the second circuit board (302). A lower housing (108) defines an ambient pressure port (310). A cap (102) defines an interior volume (332) into which the electronics control cartridge fits (800). The cap (102) can define a shielding panel (112) configured to fit over an exterior portion of the ambient pressure port (336) when the cap (102) is engaged with the lower housing (108). Other embodiments are also included herein.