Air Filter Element With Circumferential Seal And Perforated Plate
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Solution Overview
Problem
Existing air filters for internal combustion engines face challenges in optimizing flow behavior and achieving good sealing, leading to inefficiencies in pressure loss and potential signal drift in air mass sensors due to uneven dust distribution.
Innovation Solution
The air filter design incorporates a circumferential seal and a partially transparent, perforated plate component to ensure even air flow distribution and reduce pressure loss, with a sealing foam that allows for additional space utilization in the filter housing, and a frame supporting the filter surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal is provided on the filter element, then sealing performance is improved, but pressure loss increases due to reduced flow cross-section
Solution Approach 1:
The patent moves the seal from a traditional position that blocks the flow cross-section to a circumferential seal at the outer edges of the filter element. This dimensional repositioning allows the seal to contact the housing parts at the periphery, leaving the central flow area open and maintaining pressure loss reduction while achieving reliable sealing.
2Productivity
If filter area is increased to improve filtering capacity, then dust distribution becomes uneven, but this causes signal drift in air mass sensors
Solution Approach 1:
The patent applies a semi-permeable component selectively covering specific areas of the filter element - particularly the inflow and outflow sides - while leaving other areas open. This local application creates preferential flow paths that distribute dust evenly across the entire filter surface, preventing localized dust accumulation that would cause sensor drift, while still maintaining high overall filtering capacity.
3Volume of moving object
If filter element is designed to fit complex geometries, then space utilization is improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the filter element into functional segments: a frame structure providing the basic geometry, a filter medium for filtering, and a semi-permeable component for flow distribution. This segmentation allows each component to be manufactured separately using standard processes, then assembled to create the final complex geometry, reducing overall manufacturing complexity while achieving good space utilization.
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
This design achieves optimized flow behavior and reduced pressure loss, preventing signal drift in air mass sensors even when the filter is loaded with dust, by ensuring uniform dust distribution and minimizing additional space requirements.
Implementation Method 1
The filter insert is at least partially covered on the inflow and/or outflow side with a semi-permeable component, which causes at least a partial equalization of the pressure distribution in the airflow.
Implementation Method 2
The semi-permeable component consists of a perforated sheet. The invention achieves a uniform distribution of the airflow into and out of the air filter by partially covering the filter element.
Implementation Method 3
a circumferential seal is advantageously provided on one side of the filter element at the outer edges, with which the filter element rests against housing parts of a filter housing
Data Source
Figure 1~3
AI summary
The invention relates to a filter element for an air filter, comprising at least one filter insert (2;4;11) and a seal (3;7) circumferentially surrounding the outer edges of the filter insert (2;4;11) on one side, with which the filter element (2;4;11) abuts housing parts (5,6) of a filter housing, wherein the filter insert (2;4;11) is designed such that the installation space on one side of the filter element can be opened or closed with minimal pressure loss. The filter insert (11) can be at least partially covered on the inflow and/or outflow side by a partially permeable component (12), which causes at least partial equalization of the pressure distribution in the airflow.Furthermore, the filter element can be mounted in the filter housing via a circumferential seal (7) such that the seal (7) is located on the outside in a receptacle (8) of the lower housing part (5) and can be acted upon by the upper housing part (6) in a sealing manner such that the seal (7) is essentially flush with the surface of the filter insert (4).