Bypass Valve Filtration With Variable Openings for Clogged Oil Flow
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Solution Overview
Problem
Existing 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 causing damage to engine parts like the balancer shaft.
Innovation Solution
A variable filter system integrated within the bypass valve, featuring a filter surface with multiple rows of openings of varying 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 is divided into multiple filtering stages with different pore sizes arranged in series. The first filtering stage captures larger particles while the second stage captures smaller particles, creating segmented filtering zones that progressively clean the oil before it reaches the bypass valve
Solution Approach 2:
The bypass valve is configured to open only after the filter reaches a predetermined level of clogging, rather than opening immediately when any clogging occurs. This preliminary threshold allows the system to maintain normal filtering operation for as long as possible before activating the bypass mechanism
2Object-affected harmful factors
If the bypass valve remains closed to maintain filtered oil flow, then engine components are protected from debris, but oil starvation occurs when the filter becomes clogged
Solution Approach 1:
A check valve is introduced as an intermediary component that works in conjunction with the bypass valve. The check valve allows unidirectional flow control and helps regulate when the bypass path activates, mediating between the need to protect components and the need to ensure continuous oil supply
Solution Approach 2:
The system changes the flow resistance parameter of the filter over time as it becomes clogged. When the resistance reaches a predetermined threshold, the bypass valve opens to change the flow path parameter, allowing oil to bypass the clogged filter while still providing some filtering through the multi-stage design
3Device complexity
If a single-level filter is used in the bypass valve, then the device complexity is reduced, but the filtering capability is insufficient to protect engine components
Solution Approach 1:
The filter is divided into multiple filtering stages with different pore sizes arranged in series. The first filtering stage captures larger particles while the second stage captures smaller particles, creating segmented filtering zones that progressively clean the oil
Solution Approach 2:
Different portions of the filter have different pore sizes optimized for different particle sizes. The first filtering stage has larger pores for coarse filtration while the second stage has smaller pores for fine filtration, applying local quality variations to maximize protective effect
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 debris-induced damage and maintaining engine integrity during thick oil conditions or filter clogging, ensuring continuous and filtered oil flow to critical joints.
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
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.