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Air Duct with HC Adsorber in Resonator

IP.com Disclosure Number: IPCOM000246086D
Publication Date: 2016-May-04
Document File: 2 page(s) / 890K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention provides a method for locating hydrocarbon adsorbing (HCA) material inside a clean air ducts resonator to collect engine emitted hydrocarbons without increasing air flow restriction.

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Air Duct with HC Adsorber in Resonator

Known State of the Art
(no comments concerning state of the art)

Description of the invention


This invention provides a method for locating hydrocarbon adsorbing (HCA) material inside a clean air ducts resonator to collect engine emitted hydrocarbons without increasing air flow restriction. The hydrocarbon adsorbing material is wrapped inside the resonator and held in place with adhesive, glue, or mechanical geometry (snap-fit). The distinguishing feature of this invention is locating the HCA out of the main engine air flow, yet still in the clean air duct. It is beneficial to locate an HCA in the clean air duct, rather than the air intake system, or air cleaner, since the HCA is more effective near the source of hydrocarbon emission the engine. A further benefit is to locate the HCA inside the resonator, thereby using a portion of the space already provided in the resonator (reducing packaging space) while removing the HCA from the flow path. Current production HCA systems that are located in the clean air duct are referred to as "full flow systems", since the engine air flow passes through the HCA, resulting in undesirable air flow restriction. Positioned the HCA within the resonator system eliminates this increase in air flow restriction, yet still places the HCA in an effective position. The HCA in resonator system is also advantageous since two functions can be performed in the same packaging space, HCA adsorption and a...