Filter Element With Optimized Support Tube Passages
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Solution Overview
Problem
Existing filter elements for internal combustion engines experience non-uniform fluid flows, leading to inefficient filtration and potential breakdowns, which affect the accuracy of air mass meters and motor control.
Innovation Solution
The filter element features a support tube with passages that are optimized in size and distribution to compensate for non-uniform flows, ensuring uniform fluid distribution across the filter medium, improving filtration efficiency and extending service life by reducing local high inflow velocities and optimizing outflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the filter element uses a conventional support tube without optimized passages, then the structure is simple, but the fluid flow becomes non-uniform leading to inefficient filtration
Solution Approach 1:
The support tube is equipped with passages of varying sizes and distributions at different locations to compensate for non-uniform fluid flows. The passage configuration is locally adapted to the fluidic configuration of the filter element, creating non-uniform passage distribution that optimizes flow uniformity across the filter medium.
Solution Approach 2:
The passages are adapted in regard to size and/or distribution to compensate for non-uniform fluid flows. The ratio of passage surface area to total surface area is designed to achieve uniform flow through the filter element, involving changes in geometric parameters of the passages.
2Productivity
If the passages are uniformly distributed, then the manufacturing is simple, but the non-uniform basic flows cannot be compensated
Solution Approach 1:
The passages are non-uniformly distributed along the support tube, with varying sizes and spacings tailored to compensate for non-uniform basic flows at different locations. This local adaptation of passage characteristics enables flow compensation while maintaining manufacturing feasibility.
Solution Approach 2:
The passage configuration is designed in advance to preemptively compensate for known non-uniform flow patterns. By anticipating the non-uniform basic flows and designing passages with appropriate size and distribution variations, the system pre-compensates for flow irregularities before they affect filtration performance.
3Productivity
If the filter medium is heavily loaded, then the filtration capacity increases, but the separation efficiency drops and service life decreases
Solution Approach 1:
The optimized passage distribution ensures uniform fluid flow across the filter medium, preventing localized overloading. By compensating for non-uniform basic flows, the system distributes the filtration load evenly, maintaining separation efficiency while maximizing overall filtration capacity.
Solution Approach 2:
The passage configuration creates a more uniform flow distribution that equalizes the loading conditions across different regions of the filter medium. This equipotential approach to flow distribution ensures that no single area is overloaded, preserving both separation efficiency and service life.
4Measurement precision
If the outflow is non-uniform, then the filter element can be simple, but the air mass meter measurements become inaccurate
Solution Approach 1:
The passages are strategically positioned and sized to ensure uniform outflow of filtered fluid. This local optimization of passage characteristics compensates for upstream flow non-uniformities and ensures that the outflow reaching the air mass meter is uniform, thereby improving measurement accuracy.
Solution Approach 2:
The support tube with adapted passages performs preliminary flow conditioning before the fluid reaches the air mass meter. By pre-compensating for flow non-uniformities through the optimized passage distribution, the system ensures that measurements are taken under uniform flow conditions.
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 solution achieves uniform fluid flow, enhancing filter medium loading, improving filtration efficiency, and maintaining separation efficiency, while providing precise measuring results for motor control.
Implementation Method 1
the passages are adapted in regard to size and/or distribution to a fluidic configuration of the filter element in such a way that non-uniform fluid flows that exist in operation of the filter element upstream of the support tube can be compensated
Data Source
AI summary
A filter element for filtering fluids has a support tube having a circumferential wall provided with passages for a fluid. A hollow elongate filter medium is arranged axially on the support tube. The passages are adapted in regard to size; distribution; or size and distribution to a fluidic configuration of the filter element such that non-uniform fluid flows that exist in operation of the filter element upstream of the support tube are compensated. The filter element is used in particular in air filters for internal combustion engines.