Suction Filter Partitioning Wall for Fuel Leakage Control
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Solution Overview
Problem
Conventional suction filters in fuel supplying devices face challenges in maintaining discharging performance during vehicle turns, as angled fuel levels can lead to fuel leakage and air suction, affecting the efficiency of fuel pumps.
Innovation Solution
A suction filter design incorporating a filter element, partitioning wall element, and open/close valve, which divides the inside space into two areas to maintain a liquid film and control air suction, ensuring stable fuel flow and reducing air intake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction filter uses a filter element with a side wall member and inflow opening to maintain liquid film contact during vehicle turns, then fuel filtering is improved, but fuel leakage from the inflow opening increases when the liquid level angles
Solution Approach 1:
The patent divides the inside space into a first space (upper) and second space (lower) using a partitioning wall element. The partitioning wall element segments the fuel capture region from the pump inlet region, allowing the liquid film to be maintained in the first space while preventing fuel leakage from discharging into the second space through the partitioning wall element's fuel passage.
Solution Approach 2:
The partitioning wall element acts as an intermediary structure between the filter element and the pump inlet. It provides a controlled fuel passage that mediates fuel flow from the first space to the second space, replacing the direct open inflow opening and preventing uncontrolled fuel leakage during vehicle turns.
2Reliability
If the suction filter captures fuel between the filter element and side wall member, then fuel is filtered before reaching the pump, but air is suctioned into the inlet when the liquid level separates from the filter element
Solution Approach 1:
The partitioning wall element segments the inside space into a first space for fuel capture and filtering, and a second space for pump inlet. This segmentation ensures that air suctioned into the first space cannot directly reach the pump inlet, as the partitioning wall element with its controlled fuel passage prevents air passage while allowing fuel passage.
Solution Approach 2:
The partitioning wall element serves as an intermediary barrier between the fuel capture space and the pump inlet space. It selectively allows fuel to pass through its fuel passage while blocking air from reaching the inlet, thus mediating the harmful effect of air suction while maintaining fuel filtering functionality.
3Productivity
If the suction filter allows fuel to flow through the inflow opening between filter element and side wall member, then fuel is supplied to the pump, but fuel is exhausted in short time during vehicle turns affecting liquid film maintenance
Solution Approach 1:
The partitioning wall element with its fuel passage acts as an intermediary that controls and regulates fuel flow from the first space to the second space. This controlled passage maintains a stable liquid film in the first space by preventing rapid fuel exhaustion, while still ensuring adequate fuel supply to the pump through the regulated passage.
Solution Approach 2:
The patent changes the flow control parameter from an open inflow opening (unrestricted flow) to a controlled fuel passage through the partitioning wall element (restricted and regulated flow). This parameter change slows down the fuel flow rate, preventing rapid exhaustion of captured fuel while maintaining continuous supply to the pump, thus extending the duration of liquid film maintenance.
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 design effectively suppresses fuel leakage and stabilizes fuel pump performance by maintaining a liquid film and controlling air intake, enhancing the discharging efficiency and preventing fuel pump instability.
Implementation Method 1
The open/close valve closes the inflow opening when a liquid level of the filtered fuel in the inside space is above the partitioning wall element and opens the inflow opening when the liquid level is below the partitioning wall element
Implementation Method 2
an outflow opening to which a negative suction pressure is applied through the inlet
Implementation Method 3
The filter element filters a stored fuel stored in the fuel tank by allowing the stored fuel to pass therethrough into an inside space of the filter element
Data Source
AI summary
The present disclosure provides a suction filter that filters a fuel inside a fuel tank of a vehicle. The suction filter includes a filter element, a partitioning wall element, a passage element, and an open/close valve. The filter element is disposed in and exposed inside of the fuel tank. The filter element filters a stored fuel stored in the fuel tank. The partitioning wall element is arranged in the inside space to divide the inside space into a first space and a second space that is lower than the first space. The inlet to take in the filtered fuel is open in the second space. The passage element defines an inflow opening open in the first space, an outflow opening to which a negative suction pressure is applied through the inlet, and a flow passage through which the filtered fuel flows. The open/close valve closes the inflow opening when a liquid level of the filtered fuel is above the partitioning wall element and that closes the inflow opening when the liquid level is below the partitioning wall element.