EXHAUST TREATMENT SYSTEM THAT GENERATES DEBOUNCE DURATION FOR NOX SENSOR OFFSET

摘要

An exhaust treatment system configured to treat exhaust gas generated by an internal combustion engine includes a reductant delivery system that injects a reductant solution into an exhaust gas. A selective catalyst reduction (SCR) device reacts with the reductant solution to reduce NOx from the exhaust gas. A control module is in electrical communication with the SCR device and the reductant delivery system. The control module determines at least one of an injection status of the reduction delivery system and a performance of the SCR device. The control module further determines at least one debounce time for delaying diagnosis of a NOx sensor based on at least one of the injection status and the performance of the SCR device.

主权项

1. An exhaust treatment system configured to treat exhaust gas generated by an internal combustion engine, the exhaust treatment system comprising:
a reductant delivery system configured to inject a reductant solution into an exhaust gas; a selective catalyst reduction (SCR) device that reacts with the reductant solution to reduce NOx from the exhaust gas; and a control module in electrical communication with the SCR device and the reductant delivery system, the control module configured to determine at least one of an injection status of the reduction delivery system and a performance of the SCR device, and to determine at least one debounce time based on at least one of the injection status and the performance of the SCR device.