VEHICLE AND A METHOD OF UPDATING AGING OF A SELECTIVE CATALYTIC REDUCTION FILTER OF AN EXHAUST TREATMENT SYSTEM OF THE VEHICLE

摘要

A vehicle and method of updating aging of a selective catalytic reduction filter (SCRF) of an exhaust treatment system of the vehicle are disclosed. The method includes determining a desorption rate estimate of a catalyst of the SCRF and determining an ash volume estimate representative of an amount of ash collected inside the SCRF. The method also includes determining an ash correction factor from the ash volume estimate and calculating, via a controller, a corrected desorption rate value by multiplying the ash correction factor with the desorption rate estimate to update the aging of the SCRF.

主权项

1. A method of updating aging of a selective catalytic reduction filter (SCRF) of an exhaust treatment system of a vehicle, the method comprising:
determining a desorption rate estimate of a catalyst of the SCRF; determining an ash volume estimate representative of an amount of ash collected inside the SCRF; determining an ash correction factor from the ash volume estimate; and calculating, via a controller, a corrected desorption rate value by multiplying the ash correction factor with the desorption rate estimate to update the aging of the SCRF; adjusting an amount of reductant being passed into an exhaust stream based on the updated aging of the SCRF.