Patent ID: 11859528
Assignee: SCANIA CV AB
Field: Chemical engineering (Chemistry)
Classification: CPC B  F  Y | IPC B  F

Claim 2:
3. The method according to claim 1, wherein adjusting the dosing of reductant comprises:
comparing the tailpipe NOx signal with a threshold tailpipe NOx value, whereby if the tailpipe NOx signal is greater than a threshold tailpipe NOx value, then the dosing of reductant is increased in order to obtain a tailpipe NOx signal less than the threshold tailpipe NOx value;
once the tailpipe NOx signal is less than the threshold tailpipe NOx value, then comparing the feedback signal with a lower boundary value and an upper boundary value; and
increasing the dosing of reductant if the feedback signal is below the lower boundary value; or
decreasing the dosing of reductant if the feedback signal is above the upper boundary value.