CPC F01N 11/002 (2013.01) [F01N 9/005 (2013.01); F01N 11/007 (2013.01); F01N 3/0814 (2013.01); F01N 3/0842 (2013.01); F01N 2550/02 (2013.01); F01N 2550/03 (2013.01); F01N 2560/026 (2013.01); F01N 2570/14 (2013.01); F01N 2900/1614 (2013.01); F02D 41/0245 (2013.01)] | 20 Claims |
1. A system comprising:
a controller configured to:
perform an enable operation responsive to receiving information indicative of an enable parameter, the enable operation comprising:
determining a predicted downstream NOx value of an exhaust gas stream exiting a NOx storage catalyst;
determining a downstream NOx value of the exhaust gas stream exiting the NOx storage catalyst;
determining an error between the predicted downstream NOx value and the determined downstream NOx value;
comparing the error to an error threshold; and
determining that the NOx storage catalyst is in good health responsive to determining that the error does not exceed the error threshold; and
perform a disable operation responsive to receiving information indicative of a disable parameter comprising a temperature of the exhaust gas stream indicating a warm engine operating condition, the disable operation causing a deactivation of at least a portion of the controller.
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