Flat Filter Element Support Body for Sealing
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Solution Overview
Problem
Existing flat filter elements for internal combustion engines require extensive sealing surfaces to prevent leak air, which increases complexity and potential for leaks.
Innovation Solution
A support/positioning body is integrated into the filter element to secure and position the sealing device within the filter housing, reducing the need for additional sealing surfaces and enhancing the sealing action with polyurethane (PUR) seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extensive sealing surfaces are used in the filter housing to prevent leak air, then sealing reliability is improved, but device complexity and potential for leaks increase
Solution Approach 1:
The support/positioning body integrates multiple functions: it supports the filter element, positions the sealing device, and prevents leak air without requiring separate sealing surfaces in the housing. The sealing device itself performs the positioning function through the integrated support body, eliminating the need for complex housing sealing structures.
Solution Approach 2:
The support/positioning body serves multiple purposes simultaneously: it acts as a structural support for the filter element, a positioning mechanism for the sealing device, and a leak prevention feature. This multi-functionality reduces the overall complexity of the sealing system while maintaining reliability.
2Reliability
If multiple sealing surfaces are provided in the filter housing and filter cover, then sealing action is achieved, but manufacturing complexity and assembly requirements increase
Solution Approach 1:
The invention extracts the positioning function from the housing structure and integrates it into the support/positioning body on the filter element. This removes the need for complex sealing surfaces in the housing and filter cover, simplifying their manufacturing while maintaining the sealing action through the sealed connection between the support body and housing.
Solution Approach 2:
The support/positioning body combines structural support and sealing positioning functions into a single component. This merging reduces the number of separate sealing surfaces needed in the housing and cover, thereby simplifying manufacturing processes and reducing assembly complexity.
3Reliability
If the sealing device is secured with multiple housing sealing surfaces, then sealing performance is improved, but the number of parts and assembly steps increase
Solution Approach 1:
The support/positioning body on the filter element performs the sealing and positioning functions without requiring separate housing sealing structures. The filter element assembly essentially seals itself against the housing through the integrated support body, reducing the number of separate sealing components and assembly steps.
Solution Approach 2:
The support/positioning body serves as both a structural support and a sealing interface, eliminating the need for separate sealing surfaces in the housing and filter cover. This reduces the total number of parts while maintaining effective sealing performance through the single sealed connection point.
Data Source
AI summary
A flat filter element (34), a filter (10), and a support/positioning body (72, 74, 76) are disclosed. The flat filter element (34) includes a filter medium (64) with an inflow-side raw side (62) and an outflow-side clean side (58). An element sealing section (77) surrounds, circumferentially closed, the filter medium (64) on the raw side (62), the clean side (58), or between the raw side (62) and the clean side (58). The element sealing section (77) serves for supporting a sealing device (78) for sealing the raw side (62) relative to the clean side (58) upon arrangement of the flat filter element (34) in a filter housing (12) of the filter (10). At least one support/positioning body (72, 74, 76) can be supported, for positioning and holding at least the sealing device (76) in the filter housing (12), on the one hand at least on the sealing device (78) and on the other hand on the filter housing (12).