External Battery TPMS Sensor for Easy Replacement
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Solution Overview
Problem
Current Tire Pressure Monitoring Systems (TPMS) designs require difficult and costly sensor replacements due to internal battery limitations, lack of practical self-inflating solutions for automobiles, and inadequate tire pressure monitoring capabilities, leading to inefficient tire maintenance and safety concerns.
Innovation Solution
A comprehensive tire pressure maintenance system incorporating an externally mounted battery, self-inflating run-flat tire arrangement, wireless tire pressure gauge, and electronically controlled regulator to monitor and maintain optimal tire pressure without physical attachment or specialized tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sensor uses an internal battery housed and sealed within the sensor unit, then the sensor structure is simplified and sealed, but the battery's limited life requires periodic replacement which is difficult and costly
Solution Approach 1:
The battery is separated from the sensor unit and placed in an external replacement battery compartment. This segmentation allows the battery to be replaced independently without removing the sensor from the rim, resolving the contradiction between simplified sealed structure and ease of battery replacement.
Solution Approach 2:
The battery is extracted from the sensor unit and housed in a separate external compartment that can be accessed and replaced without removing the tire or wheel. This extraction enables easy battery replacement while maintaining the sensor's sealed structure.
2Reliability
If TPMS sensors are installed within the interior of the rim, then real-time tire pressure monitoring is achieved, but accessing the sensor requires removing the tire which is difficult and requires specialized tools
Solution Approach 1:
The battery compartment is segmented as a separate external component that can be accessed independently of the sensor unit and rim. This allows battery replacement without tire removal, maintaining monitoring reliability while improving operational ease.
Solution Approach 2:
An external replacement battery compartment acts as an intermediary between the sensor unit and the user. This intermediary component can be accessed and replaced through the valve stem opening without requiring tire removal or specialized tools.
3Adaptability or versatility
If self-inflating tires use an external delivery system with on-board air compressors, then tire inflation capability is provided, but the system is not practical for automobile and light vehicle applications
Solution Approach 1:
The heavy on-board air compressor system is extracted and replaced with a portable external inflation device that connects through the valve stem. This extraction makes the inflation capability practical for automobile applications by eliminating the need for integrated compressor hardware.
Solution Approach 2:
The valve stem is designed to serve multiple functions: traditional air inflation and access to the external battery compartment. This multi-functionality provides tire inflation capability without requiring separate specialized hardware, improving practicality for automobile applications.
4Ease of operation
If peristaltic pumps are placed between the lip of the tire and the wheel rim to inflate tires, then a solution for automobile applications is provided, but customized rims or tires are required
Solution Approach 1:
The valve stem assembly is designed to provide multiple functions including traditional air inflation and access to the external battery compartment using standard hardware. This universal design eliminates the need for customized rims or tires, allowing the system to work with conventional automobile wheels.
Data Source
AI summary
A comprehensive tire pressure maintenance system for use with motor vehicles that includes a TPMS with an externally mounted battery, tubular battery configured for deployment on a valve stem configured to accommodate deployment of the tubular battery, a self-inflating pressure-optimizing tire arrangement, and a self-inflating run-flat tire arrangement and a wireless tire pressure gauge.