Estimation of efficiency for aged catalysts
Patents
Language: |
Английский |
Type: |
Invention |
Number |
US 8783012 B2 |
Request number: |
13/536,914 |
Request date: |
Jun 28, 2012 |
patent.field.start_date: |
|
Registration date: |
Jul 22, 2014 |
patent.field.request_publication_date: |
|
Authors |
Ukropec R.
,
Dubkov A.A.
,
Yacoub Y.M.
,
Chigapov A.N.
,
Carberry B.P.
|
Affiliations |
1 |
Ford Global Technologies, LLC, Dearborn, MI (US)
|
|
Systems and methods for estimating an efficiency of a catalyst placed in an exhaust path of a combustion engine are disclosed. In one example approach, a method comprises: ageing the catalyst consecutively at different temperatures for definite time periods; measuring the catalyst conversion efficiency after each ageing step; calculating the ageing factor for each step of the ageing procedure and the accumulative value of the ageing factors for all steps of the ageing procedure; estimating catalyst efficiency correlation factors related to the measured catalyst conversion efficiency for each temperature point and for all ageing conditions; determining a correlation between the catalyst efficiency correlation factors and the accumulative value of the ageing factors; and calculating the conversion efficiency of the aged catalyst based on a predetermined correlation between the accumulative ageing factor and the catalyst efficiency correlation factor.