Oil Filter Assembly With Pressure-Actuated Valve
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Solution Overview
Problem
Conventional oil filters for vehicle engines suffer from premature engine damage due to particulate debris re-entering the engine when the bypass valve opens, and insufficient oil flow when the filter media becomes plugged, leading to inadequate lubrication and cooling.
Innovation Solution
An oil filter assembly with a pressure-actuated valve that opens only when the primary filter becomes dirty, allowing oil to pass through a secondary filter with greater porosity, while allowing for easy disassembly and cleaning of the filters to restore effectiveness, using durable materials that can last longer than the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bypass valve is opened when the filter media becomes plugged, then oil flow is maintained to prevent engine damage, but particulate debris is able to traverse the valve and re-enter the engine causing wear and damage
Solution Approach 1:
The filter assembly is divided into a primary filter media and a secondary filter media with different porosity levels. The primary filter captures larger particulates, while the secondary filter with greater porosity provides an additional filtration path when the primary becomes plugged, preventing debris re-entry while maintaining oil flow.
Solution Approach 2:
The system changes the porosity parameter by switching from the primary filter media (lower porosity) to the secondary filter media (greater porosity) when the primary becomes plugged. This parameter change allows the system to adapt to different filtration needs based on the clogging state.
2Reliability
If oil is forced through a plugged filter media, then filtration is maintained, but not enough oil can get through to effectively cool and lubricate the engine
Solution Approach 1:
The system dynamically switches between the primary filter media and the secondary filter media based on the clogging state. When the primary filter becomes plugged, the bypass valve redirects oil flow to the secondary filter media, which has greater porosity and allows higher oil flow rates while still providing filtration.
Solution Approach 2:
The system changes the porosity parameter by switching from the primary filter media (lower porosity) to the secondary filter media (greater porosity) when the primary becomes plugged. This parameter change allows the system to adapt to different filtration needs based on the clogging state.
3Device complexity
If a single filter media is used, then the device complexity is low, but the filter lifespan is limited by the plugging of the filter media
Solution Approach 1:
The filter assembly is divided into a primary filter media and a secondary filter media with different porosity levels. The primary filter captures larger particulates, while the secondary filter with greater porosity provides an additional filtration path when the primary becomes plugged, preventing debris re-entry while maintaining oil flow.
Solution Approach 2:
The system changes the porosity parameter by switching from the primary filter media (lower porosity) to the secondary filter media (greater porosity) when the primary becomes plugged. This parameter change allows the system to adapt to different filtration needs based on the clogging state.
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
Prevents engine damage by ensuring continuous filtration through the secondary filter even when the primary filter is dirty, and allows for easy maintenance and extended filter lifespan by enabling cleaning and reuse of the primary filter.
Implementation Method 1
Oil may pass through the pressure-actuated valve only when an oil pressure differential between the peripheral portion and the central portion of the outer enclosure exceeds a predetermined threshold pressure
Implementation Method 2
A primary filter has a first porosity. Oil may pass through the primary filter to move from a first portion (e.g., peripheral portion) to a second portion (e.g., central portion) of the outer enclosure
Data Source
AI summary
An oil filter assembly is disclosed for a machine, such as an internal combustion engine, that has an oil output port and an oil input port. A mounting plate may be fixed with an outer enclosure and may be adapted for securing to the machine. The mounting plate may be further adapted to conduct oil from the machine into a peripheral portion of the outer enclosure, and then returning oil from a central portion of the outer enclosure back to the machine. Oil may pass from the peripheral portion to the central portion through a primary filter having a first porosity. A pressure-actuated valve may be fixed fluidly between the peripheral portion and central portion of the outer enclosure. Oil may pass through the pressure-actuated valve only when an oil pressure differential between the peripheral portion and the central portion of the outer enclosure exceeds a predetermined threshold pressure. A secondary filter may have a second porosity greater than the first porosity, and may be fixed fluidly between the pressure-actuated valve and the central portion of the outer enclosure.