Reductant injection control system

摘要

An exhaust system including a plurality of exhaust treatment devices, plurality of injectors for dosing an exhaust treatment fluid into an exhaust stream, and a controller for controlling each of the plurality of injectors. The controller actively controls an amount of exhaust treatment fluid dosed into the exhaust stream by each of the plurality of injectors based on at least one of an exhaust flow rate and a temperature of the exhaust stream.

主权项

1. An exhaust system, comprising:
a plurality of exhaust treatment devices arranged in parallel flow paths; a plurality of injectors for dosing an exhaust treatment fluid into an exhaust stream located in the parallel flow paths; a thermal enhancement device provided in each parallel flow path; and a controller for controlling each of the plurality of injectors and each of the thermal enhancement devices, wherein the controller actively controls an amount of exhaust treatment fluid dosed into the parallel flow paths by each of the plurality of injectors based on an exhaust flow rate of the exhaust stream through each of the parallel flow paths, and the controller actively controls operation of each of the thermal enhancement devices based on a temperature of the exhaust stream in each of the parallel flow paths, wherein the controller actively controls the thermal enhancement devices to control a mass flow of the exhaust stream through the parallel flow paths.