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

Active coating technology of lean oxides of nitrogen trap catalyst for internal combustion engine

An oxidation catalyst, nitrogen oxide technology, applied in the direction of internal combustion piston engine, metal/metal oxide/metal hydroxide catalyst, combustion engine, etc., can solve the high manufacturing cost, high system complexity, exhaust gas treatment system installation Flexibility reduction and other issues to achieve the effect of reducing NOx emissions and cost savings

Inactive Publication Date: 2014-03-26
GM GLOBAL TECH OPERATIONS LLC
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] This configuration, due to the number of components, and in particular the number of injectors required for distributing hydrocarbons and urea in the exhaust pipe, results in high system complexity, high manufacturing costs and also leads to exhaust gas treatment system The reduction of installation flexibility

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
  • Active coating technology of lean oxides of nitrogen trap catalyst for internal combustion engine
  • Active coating technology of lean oxides of nitrogen trap catalyst for internal combustion engine
  • Active coating technology of lean oxides of nitrogen trap catalyst for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0094] Some embodiments may include automotive systems 100 such as figure 1 and 2 As shown, it includes an internal combustion engine (ICE) 110 having an engine block 120 defining at least one cylinder 125 having a piston 140 coupled to rotate a crankshaft 145 . Cylinder head 130 cooperates with piston 140 to define combustion chamber 150 . An air mixture (not shown) is then disposed in combustion chamber 150 and ignited, resulting in thermal expansion of the exhaust gases, which causes reciprocation of piston 140 . Fuel is provided by at least one fuel injector 160 and air is provided through at least one air intake 210 . Fuel is provided to fuel injector 160 at high pressure from fuel rail 170 in fluid communication with high pressure fuel pump 180 , which increases the pressure of fuel source 190 containing the fuel. Each cylinder 125 has at least two valves 215 actuated by a camshaft 135 that rotates in time with the crankshaft 145 . Valve 215 selectively allows air t...

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

No PUM Login to View More

Abstract

A catalyst converter of a lean oxides of nitrogen (NOx) trap (281) comprises a catalyst substrate coated with a wash-coat with at least two active zones, wherein a rear zone comprises two active components; an oxidation catalyst and an adsorbent, and a minimized oxygen storage capacity (OSC), wherein a zone immediately before the rear zone comprises an oxidation catalyst, a reduction catalyst, an adsorbent and an oxygen storage capacity (OSC).

Description

technical field [0001] The present disclosure relates to a new washcoat technology for lean nitrogen oxide traps of internal combustion engines for enhanced ammonia production. Background technique [0002] It is known that exhaust gas aftertreatment systems of diesel engines can be equipped with Lean NOx Trap (LNT) and other devices. [0003] A Lean NOx Trap (LNT) is provided for trapping nitrogen oxides NOx contained in the exhaust gas and is located in the exhaust line. [0004] LNT is a catalytic device comprising a PGM (platinum group metal) catalyst and an adsorbent (such as a barium-based element) that provides active sites suitable for binding nitrogen oxides (NOx) contained in exhaust gases for trapping them in the device within oneself. [0005] Lean nitrogen oxide traps (LNTs) are subjected to periodic regeneration treatments that are typically used to release and reduce trapped nitrogen oxides (NOx) from the LNT. [0006] The LNT is cycled, for example by swit...

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
Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28
CPCB01D53/9422B01D53/9472B01D2255/1021B01D2255/1023B01D2255/1025B01D2255/908B01D2255/91B01D2258/012B01J23/58B01D53/9477F01N3/0814B01D2255/2042B01D2257/404F01N3/0842F01N2510/0682Y02T10/12B01J35/19B01J35/56B01D53/56B01D53/565B01D53/94B01D53/9459B01D53/9463
Inventor E.雷尼尔A.德菲利波
Owner GM GLOBAL TECH OPERATIONS LLC