In-Line Hydrocarbon Adsorber System for ULEV

960348

02/01/1996

Event
International Congress & Exposition
Authors Abstract
Content
An In-line hydrocarbon (HC) adsorber system was developed to reduce cold start HC emissions. The system comprises a first catalyst, adsorber unit, and a second catalyst for oxidation of desorbed HC. During cold start, exhaust gas is directed to the hydrocarbon adsorber using a fluidic flow diverter unit without any mechanical moving parts in the exhaust system. After the first catalyst lights off, the diverter is shut off and the major portion of the exhaust gas then flows directly to the second catalyst without heating the adsorber unit. After the second catalyst reaches light-off temperature additional air was added to oxidize the desorbed HC.
The system attributes:
NMHC emissions in ULEV range Straight line axial flow Reliable design Limited back pressure penalty The system was tested on a 3.8L U.S. vehicle.
Meta TagsDetails
DOI
https://doi.org/10.4271/960348
Pages
20
Citation
Patil, M., Hertl, W., Williams, J., and Nagel, J., "In-Line Hydrocarbon Adsorber System for ULEV," SAE Technical Paper 960348, 1996, https://doi.org/10.4271/960348.
Additional Details
Publisher
Published
Feb 1, 1996
Product Code
960348
Content Type
Technical Paper
Language
English