Aging of Zeolite Based Automotive Hydrocarbon Traps Southwest Research Institute

Format:

Conference/Event

Author/Creator:

Kostek, Ted, author.

Conference Name:

SAE World Congress & Exhibition (2007-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

AbstractThis paper analyzes the aging of zeolite based hydrocarbon traps to guide development of diagnostic algorithms. Previous research has shown the water adsorption ability of zeolite ages along with the hydrocarbon adsorption ability, and this leads to a possible diagnostic algorithm: the water concentration in the exhaust can be measured and related to aging. In the present research, engine experiments demonstrate that temperature measurements are also related to aging. To examine the relationship between temperature-based and moisture-based diagnostic algorithms, a transient, nonlinear heat and mass transfer model of the exhaust during cold-start is developed. Despite some idealizations, the model replicates the qualitative behavior of the exhaust system. A series of parametric studies reveals the sensitivity of the system response to aging and various noise factors. The results of the sensitivity study show good agreement with previous research, and the results demonstrate a tight relationship between transient temperature and transient water concentration. Finally, some comments are made about application to the SULEV standards

Notes:

Vendor supplied data

Publisher Number:

2007-01-1058

Access Restriction:

Restricted for use by site license