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System, method and apparatus for low temperature dosing in diesel engine exhaust system

A quantitative supply and low temperature technology, applied in the direction of exhaust equipment, electronic control of exhaust treatment equipment, diagnostic equipment of exhaust treatment equipment, etc.

Active Publication Date: 2019-07-12
CUMMINS EMISSION SOLUTIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, operating at low temperatures without reductant injection will cause NOx emissions to exceed the limits required for NOx emissions

Method used

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  • System, method and apparatus for low temperature dosing in diesel engine exhaust system
  • System, method and apparatus for low temperature dosing in diesel engine exhaust system
  • System, method and apparatus for low temperature dosing in diesel engine exhaust system

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Embodiment Construction

[0043] In order to promote an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It should be understood, however, that no limitation of the scope of the invention is thereby intended, any changes and further modifications in the illustrated embodiments, and the invention as illustrated therein, would normally occur to one skilled in the art to which the invention pertains. Any further applications of the principles of the invention are contemplated herein.

[0044] refer to figure 1 , an exemplary system 100 including an exhaust aftertreatment system 110 is shown. The system 100 may be provided on a vehicle powered by an engine 102, such as a diesel engine, or the engine 102 used in other applications such as power generation or pumping systems. Engine 102 includes an intake system 104 through which charge air enters, and an exhaust system 106 th...

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Abstract

The present application relates to systems, methods and apparatus for cryogenic dosing in diesel engine exhaust systems. Systems, devices, and methods for reductant dosing in an exhaust aftertreatment system are disclosed. The dynamic flow rate and injection duration of reductant injected from the reductant dosing system into the exhaust aftertreatment system are controlled in response to the dosing command when the exhaust system is operating at low temperature operating conditions.

Description

[0001] This application is a divisional application of the application dated August 28, 2014, the application number is 201480056197.9, and the invention title is "system, method and device for low-temperature quantitative supply in diesel engine exhaust system". technical field [0002] The present application relates generally to diesel exhaust systems for internal combustion engines, and more particularly, but not exclusively, to low temperature dosing of reductant in diesel exhaust systems. Background technique [0003] Modem systems that include internal combustion engines typically include a selective catalytic reduction (SCR) exhaust aftertreatment system that controls exhaust system emissions. SCR systems typically include a reductant storage tank connected to a closer that injects reductant into the exhaust stream to reduce NOx emissions. Under normal operating conditions, reductant is injected into the exhaust stream at a continuous rate. [0004] Injection of red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/20F01N9/00F01N11/00B01D53/90B01D53/94
CPCB01D53/90B01D53/9431B01D53/9495F01N3/208F01N11/002F01N2900/1621F01N2900/1812F01N2610/146F01N2900/1602F01N2610/02F01N2560/026F01N2560/06F01N9/00Y02C20/10Y02T10/12Y02T10/40
Inventor 龚谨谦邵佳斯法阔志
Owner CUMMINS EMISSION SOLUTIONS