Patent ID: 11920507
Assignee: DEERE & COMPANY
Field: Chemical engineering (Chemistry)
Classification: CPC F  B  Y | IPC B  F

Claim 0:
1. A method of treating exhaust gas from an internal combustion engine as the exhaust gas passes through an exhaust gas pathway, the method comprising:
injecting reductant into the exhaust gas pathway at a first location;
sensing a temperature of the exhaust gas at a position along the exhaust gas pathway;
comparing the sensed temperature to a threshold temperature;
injecting reductant into the exhaust gas pathway at a second location upstream of the first location and at a first rate in response to the sensed temperature being less than the threshold temperature; and
injecting reductant into the exhaust gas pathway at the second location at a second rate less than the first rate in response to the sensed temperature being greater than or equal to the threshold temperature.