METHOD FOR DIAGNOSING A CATALYTIC DEVICE OF AN ENGINE EXHAUST GAS AFTER-TREATMENT SYSTEM
Abstract
A method for diagnosing a catalytic device, wherein said method comprises at least a phase of estimating an aging index I of said catalytic device, and wherein the estimation of said aging index comprises the steps of determining the catalytic device operating temperature T, determining an aging factor F in a function of the operating temperature, determining the time period t spent by the catalytic device at said operating temperature, calculating a contributing aging coefficient C in function of said aging factor and said time period, and increasing a cumulative aging parameter P by adding said contributing aging coefficient. The method may comprise setting a maximum value of the of the cumulative aging parameter and calculating the aging index as the ratio between the maximum value and the actual aging parameter. The aging coefficient may be calculated by multiplying the aging factor and the determined time period. A computer program is also claimed.
Classe Tecnologica
G - Physics
Patent Office
United States Patent and Trademark Office
Numero Deposito
US2011153260
Anno Deposito
2009
Anno Concessione
2011
Inventori Pugliesi
- Sacco Nicola
Tutti gli inventori
- Nicola Sacco
- Alessandra Chianale
- Igor Zanetti
Titolari pugliesi
- Non ci sono titolari pugliesi
Tutti i titolari
- GM Global Technology Operations INC
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