Filter Closure System with Recessed Sealing Receptacle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing filter systems for internal combustion engines face challenges in maintaining seal-tightness and protecting sealing devices from environmental effects, leading to potential operational failures due to temperature changes and exposure to dirt/moisture.
Innovation Solution
A replaceable filter with a filter closure system that incorporates a sealing device, such as an O-ring, protected within a receptacle to prevent dirt and moisture from entering the filter housing, and a hollow-cylindrical annular member that stabilizes the connection and guides the counter connecting member, ensuring secure sealing independent of insertion depth or closure force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal is exposed on the exterior side of the filter receptacle for sealing purposes, then seal-tightness can be achieved, but the seal becomes vulnerable to environmental effects such as dirt and moisture accumulation
Solution Approach 1:
The patent introduces an intermediary structure (the recessed sealing area or 'Schulter' in the filter receptacle) that mediates between the sealing function and environmental protection. The seal is positioned in this recessed area, which acts as a protective barrier preventing direct exposure to dirt and moisture while maintaining the sealing contact surface.
Solution Approach 2:
The patent moves the seal from a two-dimensional exposed surface to a three-dimensional recessed position within the filter receptacle structure. By creating a recessed sealing area, the seal is positioned in a different spatial dimension that provides both sealing functionality and environmental protection.
2Reliability
If the annular walls are designed with a truncated cone shape for seal contact, then axial and radial sealing force is achieved, but different expansions due to temperature changes affect the securing force
Solution Approach 1:
The patent modifies the geometric parameters of the sealing structure by introducing a recessed sealing area with specific dimensional relationships. The recessed area provides a contact surface that accommodates thermal expansion while maintaining consistent sealing pressure, effectively decoupling the sealing force from temperature-induced dimensional changes.
3Reliability
If the seal is compressed between annular walls with truncated cone contact surfaces, then seal-tightness is achieved, but the exterior side of the seal remains unprotected and vulnerable to pollution
Solution Approach 1:
The recessed sealing area serves as an intermediary structure that protects the seal from environmental contamination while maintaining the necessary contact surfaces for sealing. The geometry of this recessed area is specifically designed to provide both protection and sealing functionality.
4Reliability
If a bayonet closure is used for connection, then form-fitting connection is achieved, but the securing force is affected by temperature changes and expansion of annular walls
Solution Approach 1:
The patent introduces a recessed sealing area with specific geometric parameters that compensate for thermal expansion effects. This structural modification changes the physical parameters of the connection system, allowing it to maintain consistent securing force across a range of temperatures.
Data Source
AI summary
A replaceable filter has a filter housing with a cylindrical connecting end. A housing lid has a cylindrical counter connecting member matching the cylindrical connecting end. A filter closure system seal-tightly connects by form fit the cylindrical connecting end and the cylindrical counter connecting member when the connecting end is inserted or pushed onto the counter connecting member in an axial connecting direction and moved relative to the counter connecting member. An annular member is arranged coaxially relative to the connecting end and has a terminal edge area that is connected seal-tightly to the filter housing such that the annular member and the connecting end define a receptacle for the cylindrical counter connecting member. A sealing device is arranged in the receptacle and connected to the filter housing. The sealing device interacts with the counter connecting member.