Patent ID: 11933211
Assignee: CATERPILLAR INC.
Field: Environmental technology (Chemistry)
Classification: CPC F  G  Y | IPC F  G

Claim 8:
9. An exhaust aftertreatment system comprising:
a reductant pump operable in a first operating state and in a second operating state;
a fluid pressure sensor;
a reductant pump control unit structured to:
receive fluid pressure data of the reductant pump from the fluid pressure sensor;
determine which one of the first pump operating state or the second pump operating state the reductant pump is presently operating in;
compare a pump health parameter indicated by the fluid pressure data to one of a first prognostic pump failure criterion associated with a first failure mode of the reductant pump or a second prognostic pump failure criterion associated with a second failure mode of the reductant pump, based upon the determined which one of the first pump operating state or the second pump operating state the reductant pump is presently operating in; and
output a pump health alert based upon a difference between the pump health parameter and the respective one of the first prognostic pump failure criterion and the second prognostic pump failure criterion.