Polymeric Trap with Adsorbent for Vehicle Air Intake
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Solution Overview
Problem
Existing air intake systems in vehicles struggle to effectively capture and retain hydrocarbon emissions during engine-off cycles, leading to unwanted discharge into the atmosphere, and current solutions face challenges in minimizing air intake restriction and weight while providing sufficient adsorption capacity.
Innovation Solution
A hydrocarbon adsorbent system is integrated into the air intake system, featuring a plastic surface coated with an adherent material comprising an organic binder and particulate materials like zeolite or activated carbon, using adhesion promoters like chlorinated polyolefins to enhance adhesion and retention, thereby reducing hydrocarbon emissions without additional weight or airflow restriction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If carbon absorbents are incorporated into the air intake system, then hydrocarbon emissions are reduced, but air intake restriction and system weight increase
Solution Approach 1:
The air intake system is divided into multiple zones with different functional properties: a first region with high porosity for adsorbing hydrocarbons and a second region with lower porosity for structural support and airflow maintenance. This local differentiation allows the system to achieve hydrocarbon capture without excessive airflow restriction.
Solution Approach 2:
The air intake system employs composite construction combining porous carbon absorbent materials with structural plastic or metal components. The porous material is integrated into specific regions of the air intake housing, creating a composite structure that provides both emission control and airflow pathways.
2Object-affected harmful factors
If carbon absorbents are incorporated into the air intake system, then hydrocarbon emissions are reduced, but system weight increases
Solution Approach 1:
The porous carbon absorbent material is applied only to specific regions of the air intake system where hydrocarbon adsorption is most needed, rather than uniformly across the entire system. This localized application reduces the total weight of absorbent material required while maintaining effective hydrocarbon capture.
Solution Approach 2:
The system utilizes porous carbon absorbent materials that provide high surface area for hydrocarbon adsorption per unit volume and weight. The porous structure enables effective emission control with minimal material quantity, thereby reducing overall system weight.
3Quantity of substance
If adsorbent material is coated on plastic surface, then hydrocarbon adsorption capacity is increased, but adhesion strength is insufficient
Solution Approach 1:
An adhesion promoter coating is applied as an intermediary layer between the plastic air intake surface and the porous carbon absorbent material. This intermediate coating enhances the bonding between the non-metallic plastic substrate and the carbon particles, preventing material脱落 while maintaining adsorption functionality.
Solution Approach 2:
The coating system creates a composite structure consisting of the plastic substrate, adhesion promoter layer, and porous carbon particles. This multi-layer composite approach ensures strong mechanical and chemical bonding while preserving the adsorbent material's functional properties.
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 solution effectively reduces hydrocarbon emissions by adsorbing volatile hydrocarbons during engine-off cycles, maintaining airflow efficiency, and meeting stringent emission control standards with minimal impact on air intake system complexity and cost.
Implementation Method 1
a hydrocarbon adsorbent system is integrated into the air intake system, featuring a plastic surface coated with an adherent material comprising an organic binder and particulate materials like zeolite or activated carbon
Data Source
AI summary
A method of adhering a particulate material, such as a hydrocarbon adsorbent material and/or a catalytic material, to a plastic surface, and products comprising the adhered material are disclosed.