Tire Pressure Module Ventilation Design
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Solution Overview
Problem
Existing tire pressure measurement modules face issues with bubble formation in the potting compound during the casting process, leading to cracks and moisture penetration, which can cause corrosion and failure of the electronic module, and also result in detachment of the compound from the container, compromising adhesion and functionality.
Innovation Solution
Incorporating ventilation openings in the container to allow gas escape during casting, ensuring even distribution of the casting compound, and using a complementary trough design to facilitate gas flow and improve adhesion, along with secure connections between the container and electronic module to prevent detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the container has only one opening for filling casting compound, then the filling process is simple, but bubbles form in the casting compound causing cracks and moisture penetration
Solution Approach 1:
The single filling opening is segmented into multiple ventilation openings distributed on the container wall. This allows the casting compound to be introduced through one opening while gases escape through multiple other openings, preventing bubble formation and improving reliability without significantly complicating the manufacturing process.
Solution Approach 2:
The ventilation openings act as intermediary channels that facilitate the escape of gases during the casting process. By providing dedicated pathways for gas evacuation, the system prevents harmful bubbles from forming in the casting compound, thus protecting the electronic module while maintaining a relatively simple filling procedure.
2Object-affected harmful factors
If the container is sealed tightly to prevent moisture entry, then protection is improved, but gas trapped during casting causes bubbles and cracks
Solution Approach 1:
Ventilation openings are provided in the container before the casting process begins, allowing gases to escape during filling. This preliminary provision of escape pathways prevents bubble formation and cracking, ensuring high manufacturing precision while maintaining the container's protective function against moisture after casting is complete.
Solution Approach 2:
The container exhibits different properties in different locations: it is sealed in most areas to prevent moisture entry, but has localized ventilation openings in specific regions to allow gas escape during casting. This local differentiation resolves the contradiction between tight sealing and gas venting, improving both casting quality and long-term protection.
3Reliability
If multiple ventilation openings are provided, then gas escape is improved, but the container structure becomes more complex
Solution Approach 1:
Instead of providing multiple large ventilation openings that would complicate the container structure, the invention uses a porous membrane that allows gases to escape through numerous microscopic pores. This approach improves bubble prevention reliability while maintaining a simple, uniform container structure without visible complex features.
Solution Approach 2:
The ventilation openings are implemented as a porous membrane integrated into the container wall, providing numerous escape pathways for gases without requiring multiple large holes or complex structural modifications. This resolves the contradiction by improving gas escape capability while keeping the container structure simple and manufacturable.
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
Prevents bubble formation and subsequent cracking, reduces moisture penetration, enhances adhesion between the potting compound and container, and ensures reliable operation and efficient production of tire pressure modules by maintaining the electronic module's integrity and functionality.
Implementation Method 1
the gas, in particular air, arranged in the container when the electronic module is cast can escape or flow out via the ventilation openings
Implementation Method 2
The moisture or dust located inside the tire can reach the electronic module through these cracks by capillary action
Data Source
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AI summary
A tire module (1) for measuring the tire pressure of a vehicle tire having a container (2) which can be mounted in a cavity in the vehicle tire and serves to accommodate a tire-pressure-measuring unit (14) which comprises at least one electronic module (20) for measuring the tire pressure, wherein the tire module (1) has a container (18) in which the electronic module (20) is at least partially arranged, wherein the electronic module (20) is embedded in a sealing compound (22) arranged inside the container (18), wherein the container (18) has at least one venting opening (28).