Threaded Temperature Reducing Member for Pressure Sensor Cleaning
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Solution Overview
Problem
It is difficult to remove incomplete combustion products from the temperature reducing member in pressure detection devices when the temperature reducing member and pressure receiving member are tightly connected, such as through laser welding or integral molding.
Innovation Solution
A pressure detection device design featuring a temperature reducing member with a first member integrally molded with the pressure receiving support portion and a second member with male threads, allowing for threadable engagement and easy detachment, along with a securing mechanism using screws to prevent unintentional dislodgement and facilitate cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the temperature reducing member and pressure receiving member are tightly connected by laser welding or integral molding, then the sealing and structural integrity are improved, but the ease of removing incomplete combustion products deteriorates
Solution Approach 1:
The temperature reducing member is divided into a first member (integrally molded with pressure receiving support portion) and a second member (detachable portion), connected through threadable engagement. This segmentation allows the second member to be removed for cleaning while the first member remains integrated with the pressure receiving member, maintaining sealing integrity while enabling easy access to combustion products.
Solution Approach 2:
The second member containing communication holes is extracted as a detachable component from the temperature reducing member. This extraction allows direct access to and removal of incomplete combustion products that accumulate in the communication holes, while the integrated first member maintains the structural connection to the pressure receiving member.
2Ease of operation
If the temperature reducing member is made detachable for easy cleaning, then the ease of removing incomplete combustion products is improved, but the sealing and structural integrity deteriorates
Solution Approach 1:
The first member is integrally molded with the pressure receiving support portion, merging the temperature reducing function with the pressure receiving structure. This integration maintains structural integrity and sealing reliability while the detachable second member provides access for cleaning combustion products from the communication holes.
Solution Approach 2:
The connection between the first and second members through threadable engagement creates a dynamic structure that can transition between assembled (for operation with reliable sealing) and disassembled (for cleaning) states. This dynamic capability allows the system to maintain integrity during operation while enabling easy maintenance.
3Productivity
If the second member is made detachable, then the productivity for maintenance is improved, but the device complexity increases due to additional threading structures
Solution Approach 1:
The threadable engagement structure serves multiple functions: it connects the first and second members during operation, enables easy detachment for maintenance, and provides a standardized interface for reassembly. This multi-functionality improves maintenance productivity while keeping the added complexity minimal and justified by the dual benefits of secure connection and easy disassembly.
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
Enables efficient removal of deposits from the temperature reducing member without compromising the sealing or operational integrity of the device, ensuring accurate pressure measurements.
Implementation Method 1
a temperature reducing member located at the pressure receiving member on a leading end at the one end of the body and configured to supply the fluid to the pressure receiving member while reducing temperature of the fluid
Implementation Method 2
a piezoelectric element configured to generate an electric charge in response to pressure from the fluid
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A pressure detection device 1 includes: an enclosure assembly configured to be mounted in a communication hole in an internal combustion engine; a diaphragm head 32 provided at one end of the enclosure assembly and configured to receive pressure of combustion gas from the internal combustion engine; and a buffer member 80 located at the diaphragm head 32 and configured to supply the combustion gas to the diaphragm head 32 while reducing the temperature of the combustion gas. Female threads formed on a first buffer member 81 of the buffer member 80 and male threads formed on a second buffer member 82 of the buffer member 80 are configured to threadably engage each other.