Unlock instant, AI-driven research and patent intelligence for your innovation.

Exhaust treatment system with hydrocarbon lean NOx catalyst

A technology of catalyst and oxidation catalyst, which is applied in the direction of exhaust treatment, exhaust device, combustion engine, etc., and can solve the problems affecting pressure drop and so on

Inactive Publication Date: 2014-04-16
TENNECO AUTOMOTIVE OPERATING CO INC
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It may also be necessary to minimize the pressure drop and / or back pressure associated with using the burner

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Exhaust treatment system with hydrocarbon lean NOx catalyst
  • Exhaust treatment system with hydrocarbon lean NOx catalyst
  • Exhaust treatment system with hydrocarbon lean NOx catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Example embodiments will be described more fully hereinafter with reference to the accompanying drawings.

[0027] figure 1 An exhaust aftertreatment system 10 is depicted for treating exhaust output by an exemplary engine 12 to a main exhaust passage 14 . An intake passage 16 is connected to the engine 12 to provide combustion air thereto. The turbocharger 18 includes a driven member (not shown) positioned in the exhaust flow. During engine operation, exhaust flow may cause driven members to rotate and provide compressed air to intake passage 16 prior to entering engine 12 .

[0028] The exhaust aftertreatment system 10 also includes a micro regeneration unit 26 located downstream of the turbocharger 18 and upstream of several exhaust aftertreatment devices. exist figure 1 In the exemplary aftertreatment system depicted, aftertreatment devices include hydrocarbon injector 28 , diesel oxidation catalyst 30 , and diesel particulate filter 32 .

[0029] The regenerat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to View More

Abstract

A system for treating an exhaust stream from an engine includes a main exhaust passageway adapted to receive the exhaust stream from the engine. A side branch is in communication with the main exhaust passageway. A regeneration unit is positioned within the side branch for combusting a fuel and heating the exhaust flowing through the main exhaust passageway. A lean NOx catalyst is positioned within the main exhaust passageway downstream of the regeneration unit. A reductant injector is positioned downstream of the regeneration unit and upstream of the lean NOx catalyst to inject reductant particles into the exhaust stream. A controller operates the regeneration unit to increase the exhaust temperature as well as operates the reductant injector to reduce NOx within the lean NOx catalyst.

Description

technical field [0001] The present disclosure generally relates to a system for treating exhaust gases. More specifically, an apparatus for increasing the exhaust gas temperature upstream of a hydrocarbon lean NOx catalyst is discussed. Background technique [0002] In an attempt to reduce the amount of NOx and particulate matter emitted into the atmosphere when the internal combustion engine is in operation, several exhaust aftertreatment devices have been developed. Exhaust aftertreatment systems are especially required when diesel combustion treatment is performed. Typical aftertreatment systems for diesel engine exhaust may include one or more of a diesel particulate filter (DPF), a selective catalytic reduction (SCR) system, hydrocarbon (HC) injectors, and a diesel oxidation catalyst (DOC). [0003] During engine operation, the DPF collects soot exhausted from the engine and reduces particulate matter (PM) emissions. Over time, the DPF fills up and starts to clog. F...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F01N3/28F01N3/20B01D53/94
CPCF01N13/009Y02T10/24F01N3/0842F01N2240/14F01N3/2066Y02C20/10F01N13/02F01N3/106F01N3/035F01N3/025F01N2610/03F01N3/0821Y02T10/12
Inventor 亚当·J·科特尔巴加布里拉·萨兰察蒂莫西·杰克逊
Owner TENNECO AUTOMOTIVE OPERATING CO INC