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US 2014/0150411 A1Published application
Reductant injection control system
AssigneeTenneco Automotive Operating Company Inc.
InventorsMichael Golin, John DeGeorge, Guanyu Zheng, Adam J. Kotrba
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Abstract
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.
Claims17
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.
4 more elements
An exhaust system, comprising:
- an exhaust flow path divided into a plurality of legs;
- an exhaust treatment device disposed in each of the plurality of legs;
- a thermal enhancement device located in each leg, and
- a controller for controlling each thermal enhancement device based on a temperature of the exhaust stream in each of the legs.
1 more element
An exhaust system, comprising:
- a plurality of exhaust treatment devices arranged in an array in an exhaust passage;
- a plurality of injectors disposed upstream of the exhaust treatment devices for dosing an exhaust treatment fluid into the exhaust passage, and
- a controller for controlling actuation of each of the injectors based on flow rate of an exhaust stream passing through each of the exhaust treatment devices,
- wherein the injectors that are disposed proximate the exhaust treatment devices that receive a greater flow rate of exhaust are actuated to a greater extent than the injectors that are disposed proximate the exhaust treatment devices that receive a lower flow rate of exhaust.
1 more element
Dependencies are inferred from the claim text.