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

Claim 11:
12. A vehicle comprising an exhaust gas aftertreatment system comprising:
a reductant dosing device;
a selective catalytic reduction, SCR, device arranged downstream of the reductant dosing device;
an ammonia slip catalyst arranged downstream of the SCR device;
a feedback NOx sensor arranged downstream of the SCR device and upstream of the ammonia slip catalyst;
a tailpipe NOx sensor arranged downstream of the ammonia slip catalyst; and
at least one control device configured to:
provide an initial dosing of reductant from the reductant dosing device;
obtain a feedback signal from the feedback NOx sensor and a tailpipe NOx signal from the tailpipe NOx sensor; and
adjust the dosing of reductant until the feedback signal exceeds the tailpipe NOx signal by a value within a predetermined positive interval.