Bypass Valve Filter Surface With Variable Openings for Engine Oil Flow
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Solution Overview
Problem
Engine oil filters with bypass valves can allow unfiltered, debris-laden oil to flow to engine components when the filter becomes clogged or the oil is too thick, potentially damaging the engine, such as the balancer shaft.
Innovation Solution
A variable filter system integrated within the bypass valve, featuring a filter surface with multiple rows of openings of different sizes, which adjusts filtering levels based on pressure applied, ensuring filtered oil supply even when the primary filter is bypassed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bypass valve opens to allow oil flow when the filter is clogged, then oil starvation is prevented, but unfiltered oil with debris flows to engine components causing potential damage
Solution Approach 1:
The filter media is segmented into multiple layers with different pore sizes, where the first layer has larger pores and the second layer has smaller pores. This segmentation allows the filter to handle different flow conditions: the first layer handles high flow rates when the bypass valve opens, while the second layer provides finer filtration when flow rates are lower, thus preventing debris from reaching engine components while maintaining oil flow.
Solution Approach 2:
Different regions of the filter media have different filtering characteristics. The first layer with larger pores is positioned to handle the initial bypass flow, while the second layer with smaller pores is positioned to provide enhanced filtration. This local quality variation allows the filter to adapt to different flow conditions and provide appropriate filtration at each stage of the bypass operation.
2Device complexity
If a single-layer filter is used in the bypass valve, then the structure is simple, but it cannot provide sufficient filtration across varying flow rates
Solution Approach 1:
The filter media is divided into two distinct layers with different pore sizes. The first layer has larger pores suitable for handling high flow rates when the bypass valve opens, while the second layer has smaller pores for providing finer filtration when flow rates are lower. This segmentation enables the filter to maintain effectiveness across varying flow conditions without requiring a complex multi-component structure.
Solution Approach 2:
Two filter layers with different characteristics are merged into a single integrated filter element. The first layer with larger pores and the second layer with smaller pores are combined in one structure, allowing the filter to provide both high-flow capability and fine filtration in a single component, thus maintaining simplicity while improving reliability.
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 variable filter system provides filtered oil supply to engine components, reducing the risk of damage from debris and contaminants, ensuring continuous and filtered oil flow during clogged filter conditions or thick oil viscosity.
Implementation Method 1
The filter surface is outward facing and configured to expose a varying number of the plurality of rows of openings to the bypass flow path based on a pressure applied on the variable filter
Implementation Method 2
a filter surface having a plurality of openings between an inside of the at least one wall and an outside of the at least one wall. One or more openings of the plurality of openings have a first size and one or more other openings of the plurality of openings have a second size
Data Source
AI summary
One or more techniques and/or systems are disclosed for bypass flow filtering. A bypass valve filter includes at least one wall configured to engage a surface of a bypass valve and a filter surface having a plurality of openings between an inside of the at least one wall and an outside of the at least one wall. One or more openings of the plurality of openings have a first size and one or more other openings of the plurality of openings have a second size, wherein the first size is different than the second size to define different levels of filtering. The bypass valve further includes an open end configured to allow fluid flow therethrough and to the plurality of openings.