Oblique Panel Filter for Reduced Air Intake Restriction
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Solution Overview
Problem
Existing panel filters in automotive applications face challenges in minimizing flow restrictions within the air intake system, particularly in maximizing upstream inlet volume for improved dirt distribution and downstream volume for consistent mass air flow sensor performance, while operating within limited and non-useful packaging environments.
Innovation Solution
The panel filter element is configured to reduce inlet and outlet flow restrictions by dividing the housing into inlet and outlet plenums, with a unique positioning and design that increases void space, allowing fluid to flow transversely through the filter media without obstructing the flow, and is mounted with a border frame and split line configuration that seals and supports the filter element within the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the panel filter element is positioned to maximize upstream inlet volume for improved dirt distribution, then dirt distribution is improved, but the available packaging space is reduced
Solution Approach 1:
The patent positions the panel filter element at an oblique angle relative to the inlet flow direction, transitioning from a conventional parallel arrangement. This angular orientation (typically 30-60 degrees) creates additional dimensional space in the upstream plenum, maximizing the volume available for dirt distribution while maintaining compact packaging. The oblique positioning allows the filter media to extend diagonally across the housing, effectively utilizing three-dimensional space rather than simply increasing linear dimensions.
2Reliability
If the panel filter element is positioned to maximize downstream volume for consistent mass air flow sensor performance, then sensor performance is improved, but the packaging environment becomes more constrained
Solution Approach 1:
The oblique positioning of the panel filter element creates an expanded downstream plenum volume by utilizing the diagonal space created by the angular orientation. This dimensional approach allows sufficient downstream volume for consistent mass air flow sensor performance without requiring increased housing dimensions that would complicate packaging. The filter element's angled configuration naturally generates the required void space in the downstream region.
Solution Approach 2:
The patent employs asymmetric positioning of the panel filter element within the housing, with the filter media extending at an oblique angle rather than symmetrically across the housing. This asymmetric arrangement optimizes the distribution of void space, providing adequate downstream volume for sensor performance while maintaining a compact overall packaging footprint. The asymmetric configuration allows flexible adaptation to constrained packaging environments.
3Productivity
If the panel filter element configuration is optimized to reduce flow restriction, then air intake system restriction is reduced, but the filter element positioning becomes more complex
Solution Approach 1:
By positioning the panel filter element at an oblique angle to the inlet flow, the patent reduces flow restriction by allowing more direct airflow paths through the upstream plenum to the filter media. This angular configuration eliminates dead zones and improves flow distribution across the filter surface, enhancing overall air intake productivity. The oblique positioning creates a more efficient flow path geometry compared to conventional parallel arrangements.
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
This configuration effectively lowers air intake system restrictions, maintaining consistent mass air flow sensor performance as the filter loads from clean to dirty, even in constrained vehicle packaging environments.
Implementation Method 1
Fluid to be filtered typically flows from an inlet then transversely through the panel filter element then to an outlet
Data Source
AI summary
A filter assembly, panel filter element, and servicing method is provided for reducing inlet flow restriction from a housing inlet into an inlet plenum and reducing outlet flow restriction from an outlet plenum to a housing outlet.