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Aftertreatment system for internal combustion engines

An internal combustion engine, lean-burn technology, applied in general control systems, internal combustion piston engines, exhaust gas treatment, etc., can solve problems such as LNT efficiency and difficult to control diagnosis

Inactive Publication Date: 2015-08-05
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the efficiency and diagnostics of LNT are very difficult to control, especially considering the increasingly stringent emission limits of the emission standards stipulated by EURO6 in its second phase, in which virtually all operating cycles are used for emission limits Acquisition of "In Use Compliance" qualification for value

Method used

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  • Aftertreatment system for internal combustion engines
  • Aftertreatment system for internal combustion engines
  • Aftertreatment system for internal combustion engines

Examples

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Embodiment Construction

[0043] Some embodiments may include such as figure 1 and 2 The illustrated automotive system 100 includes an internal combustion engine (ICE) 110 having an engine block 120 defining at least one cylinder 125 having a piston 140 for rotating a crankshaft 145 . Cylinder head 130 cooperates with piston 140 to define combustion chamber 150 .

[0044] A fuel and air mixture (not shown) is input into combustion chamber 150 and ignited, the resulting hot expanding exhaust gases causing reciprocating motion of piston 140 . Fuel is provided through at least one fuel injector 160 and air is provided through at least one air intake 210 . Fuel is supplied to fuel injector 160 at high pressure from fuel rail 170 which is in fluid communication with high pressure fuel pump 180 to increase the pressure of fuel from fuel source 190 .

[0045] Each cylinder 125 has at least two valves 215 driven by a camshaft 135 that rotates simultaneously with the crankshaft 145 . Valve 215 selectively a...

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Abstract

An aftertreatment system of an internal combustion engine is disclosed. The aftertreatment system includes in a sequence along the exhaust pipe, a lean NOx trap and a particulate filter. An air / fuel ratio sensor is located upstream of the lean NOx trap and downstream of the turbine outlet to determine the air / fuel ratio during a regeneration process (DeNOx) in the lean NOx trap. A NOx sensor is located downstream of the lean NOx trap or downstream of the particulate filter, to determine NOx in the exhaust pipe. A turbine temperature is determined in accordance with a first means, and a temperature during a desulphation process (DeSOx) in the lean NOx trap is determined in accordance with a second means. At least one of the first and second means for determining a temperature may be a temperature sensor.

Description

technical field [0001] The invention relates to an aftertreatment system for an internal combustion engine. The system and the method of operating the system are suitable for complying with the emission standards stipulated in the second stage of the EURO6 regulation. Background technique [0002] It is known that the aftertreatment system of a diesel engine can be equipped with a lean NOx trap (hereinafter also referred to as LNT). LNTs are provided for trapping nitrogen oxides (NOx) contained in exhaust gases and located in exhaust pipes. Furthermore, such an aftertreatment system is also usually provided with a diesel particulate filter (DPF) for controlling particulate matter. [0003] An LNT is a catalytic device vessel that contains a catalyst (such as rhodium, platinum, and palladium) and an absorbent (such as a component containing elemental barium) that provides a x ) combined active sites in order to trap nitrogen oxides within the device itself. The lean-burn ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/035F01N11/00F01N3/20F01N9/00
CPCG05B15/02F02B37/00F01N13/009F01N3/0821B01D46/0057F01N9/002F01N11/007F01N3/0842F01N3/0814F01N3/0885F01N9/00F01N9/005F01N3/021F01N2560/025F01N2560/06F01N2900/1404F01N2900/1614Y02T10/12Y02T10/40B01D53/9422B01D53/96F01N2560/026B01D46/66
Inventor R.阿尔格利尼D.默丘里
Owner GM GLOBAL TECH OPERATIONS LLC