METHOD OF OPERATING AN EXHAUST EMISSION CONTROL DEVICE, AND CORRESPONDING EXHAUST EMISSION CONTROL DEVICE

摘要

In a method of operating an exhaust emission control device, the presence of an actual pressure loss of a particulate filter is determined, and a model pressure loss is determined as a function of a state variable. On the basis of the actual pressure loss and the model pressure loss a pressure quotient is determined and a condition of the particulate filter is ascertained in a diagnostic mode in response to the pressure quotient.

主权项

1. A method of operating an exhaust emission control device, comprising:
determining the presence of an actual pressure loss across a particulate filter; determining a model pressure loss as a function of a state variable; determining a pressure quotient as a function of the actual pressure loss and the model pressure loss; and ascertaining a condition of the particulate filter in a diagnostic mode in response to the pressure quotient.