Pleated Vehicular Air Filter with Activated Carbon Layer
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Solution Overview
Problem
Vehicular air filters face limitations in size and configuration due to compact engine compartment designs, leading to reduced efficiency in removing airborne contaminants such as dust, soot, pollen, and volatile organic/inorganic compounds, which can cause health issues for occupants.
Innovation Solution
A vehicular air filter with a particle filtering media containing a glass fiber or synthetic fiber backing layer and a polymeric membrane layer, combined with an activated carbon layer on a polymeric support, providing a large surface area for filtration and efficient removal of particles ≥0.3 microns and volatile compounds, with a removal efficiency of 99.5% or greater.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter surface area is increased to improve particle removal efficiency, then the filtration efficiency improves, but the filter size becomes too large for the compact engine compartment
Solution Approach 1:
The filter media is folded into a pleated configuration, transforming a two-dimensional flat surface into a three-dimensional structure with significantly increased surface area. This dimensional transformation allows the filter to achieve HEPA-level filtration efficiency (99.97% particle removal) while maintaining a compact form factor that fits within the vehicle's engine compartment constraints.
Solution Approach 2:
The filter employs a multi-layer construction where different functional layers are nested within each other. The pleated filter media is housed within a compact frame structure, and the activated carbon layer is integrated within the filter media assembly. This nested arrangement maximizes the utilization of available space while maintaining both particle filtration and gas adsorption functions.
2Reliability
If the filter surface area is increased to improve volatile compound removal efficiency, then the adsorption capacity improves, but the filter complexity increases
Solution Approach 1:
The filter combines particle filtration and gas adsorption functions into a single integrated media assembly. The pleated filter media incorporates both the particle-filtering layer and the activated carbon layer for volatile compound adsorption, eliminating the need for separate filters and reducing overall system complexity while achieving dual functionality.
Solution Approach 2:
The filter media is constructed as a composite structure combining different materials with complementary functions: a base filter material for particle capture and activated carbon impregnated or layered within the media for volatile organic compound adsorption. This composite approach enables simultaneous removal of particles and gases through a single filter element.
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 filter achieves high particulate and volatile compound removal efficiencies, enhancing cabin air quality by reducing airborne contaminants and meeting European Union standards, while maintaining a pressure drop within acceptable limits for efficient airflow.
Implementation Method 1
the particle filtering media provides a removal efficiency of 99.5% or greater of particles having a diameter of 0.3 microns or greater
Implementation Method 2
the activated carbon layer reduces incoming levels of one or more volatile organic or inorganic compounds
Data Source
AI summary
The present disclosure is directed at a vehicular air filter with relatively high efficiency particle arresting performance along with removal of volatile organic and/or inorganic contaminants. The filter is particularly suitable for hybrid type vehicles.