Valve Plate Device with Varying Lip Thickness for Filter Flow Control
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Solution Overview
Problem
Filter devices for motor vehicles face challenges with fluctuating pressure and volume flow conditions, leading to suboptimal performance, high maintenance costs, and increased resistance due to the need for multiple filter stages and replaceable filter elements.
Innovation Solution
A valve plate device with varying lip thicknesses and opening resistances allows for sequential operation of cyclone filter arrangements, compensating for fluctuating pressure and volume flows, and is designed to be easy and inexpensive to manufacture and assemble.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-stage cyclone air filter is used as a pre-separator, then the device complexity is reduced, but the separation efficiency is insufficient and resistance becomes uneconomically high
Solution Approach 1:
The filter system is divided into multiple stages: a first stage with a single cyclone for coarse separation and a second stage with a filter element for fine separation. This segmentation allows each stage to perform its specific function optimally, achieving both high separation efficiency and acceptable device complexity.
2Reliability
If a replaceable filter element is used in the main filter, then separation efficiency is improved, but maintenance costs increase and replacement becomes time-consuming
Solution Approach 1:
The system dynamically switches between two filtration modes: using only the first-stage cyclone filter when volume flow is high, and using both stages in series when volume flow is low. This dynamic operation extends the service life of the replaceable filter element and reduces maintenance frequency.
3Reliability
If multiple parallel cyclone filter arrangements are used to handle fluctuating volume flows, then separation efficiency is maintained, but device complexity and manufacturing costs increase
Solution Approach 1:
Instead of changing the number of cyclone arrangements, the system changes the operational parameters by switching between different filtration modes based on volume flow conditions. A single cyclone handles high flow rates, while the same cyclone works in conjunction with the filter element at low flow rates, eliminating the need for multiple parallel arrangements.
4Strength
If the material thickness of valve plate assembly is increased to improve durability, then strength is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The valve plate assembly has non-uniform thickness: thicker in regions requiring high strength (such as mounting areas and support structures) and thinner in regions where less strength is needed. This local quality variation optimizes the balance between durability and manufacturing cost.
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
The solution enables the filter device to maintain optimal performance and reduce maintenance costs by adjusting cyclone filter usage based on pressure and volume flow requirements, ensuring consistent filtration quality and efficiency.
Implementation Method 1
The material thickness of the valve plate assembly and/or the material thickness of the lips increases towards one side of the valve plate assembly... The lips thus open and/or operate effectively under different response or suppression pressures... allowing the fluctuating pressure and/or flow rates to be compensated for
Implementation Method 2
Individual flow tubes have at least one tangentially arranged gas inlet opening at their end pointing in the gas inlet direction and are closed at the end face adjacent to this opening by means of a cover, whereby a combined rotational and axial flow with a swirl component is generated in the flow tubes
Data Source
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AI summary
The invention relates to a valve plate assembly (VP), preferably for a device with fluctuating pressure conditions and/or fluctuating volume flows, in particular for a filter device (1) for a motor vehicle, wherein the valve plate assembly (VP) has at least two through-openings (D1, D2, D3) and at least two lips (L1, L2, L3) for opening and closing the through-openings (D1, D2, D3), and the thickness (s) of the valve plate assembly (VP) and/or the lips (L1, L2, L3) increases towards at least one side, preferably such that the lips (L, L2, L3) have different weights and/or different opening and closing resistances. The invention further comprises a filter device for a motor vehicle with at least one valve plate assembly (VP) as described above.The valve plate assembly is designed to switch individual cyclone filter arrangements on or off as required or depending on the volume flow by opening and closing the lips.