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Method for operating an exhaust gas aftertreatment system of an internal combustion engine, an exhaust gas aftertreatment system for an internal combustion engine, and an internal combustion engine comprising such an exhaust gas aftertreatment system

A technology of exhaust gas after-treatment and internal combustion engine, which is applied in the direction of electronic control of exhaust treatment device, diagnostic device of exhaust treatment device, exhaust treatment, etc., which can solve the problems of high cost, reduced fuel efficiency, and space consumption.

Inactive Publication Date: 2019-06-28
MOTOREN & TURBINEN UNION FRIEDRICHSHAFEN GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To compensate for this, such combustion engines are either tuned to lower NOx emissions (which, however, leads to reduced fuel efficiency) or they are equipped with larger, heavier and especially bulkier SCRs - catalytic converters, which are expensive, in reference to exhaust back pressure, which is bad for internal combustion engines and is space consuming

Method used

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  • Method for operating an exhaust gas aftertreatment system of an internal combustion engine, an exhaust gas aftertreatment system for an internal combustion engine, and an internal combustion engine comprising such an exhaust gas aftertreatment system
  • Method for operating an exhaust gas aftertreatment system of an internal combustion engine, an exhaust gas aftertreatment system for an internal combustion engine, and an internal combustion engine comprising such an exhaust gas aftertreatment system

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Embodiment Construction

[0046] figure 1 A schematic illustration of an exemplary embodiment of an internal combustion engine 1 with an exhaust gas aftertreatment system 3 with an exhaust gas path 5 is shown, wherein an SCR catalytic converter 7 is arranged in the exhaust gas path 5 , the SCR- The catalytic converter has an SCR catalytic converter material, wherein the exhaust gas aftertreatment system 3 also has a reducing agent metering device 9 which is provided for feeding a reducing agent, in particular ammonia or an ammonia precursor product, in particular urea - The water solution is metered into the exhaust gas path 5 upstream of the SCR catalytic converter 7 . Furthermore, the exhaust gas aftertreatment system 3 has at least one detection device 11 (here: a plurality of detection devices 11 ) for detecting at least one operating parameter (here: in particular for detecting a plurality of operating parameters), In this case, at least one operating parameter is related to the oxidation state o...

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Abstract

The invention relates to a method for operating an exhaust gas aftertreatment system (3) of an internal combustion engine (1), wherein at least one operating parameter is detected during the operationof the exhaust gas aftertreatment system, the operating parameter being associated with an oxidation state of an SCR catalyst material of the exhaust gas aftertreatment system (3), and at least one measure for preventing an ongoing reduction of the SCR catalyst material and / or at least one reoxidizing measure for reoxidizing the SCR catalyst material is introduced in accordance with the at leastone operating parameter.

Description

technical field [0001] The invention relates to a method for operating an exhaust gas aftertreatment system of an internal combustion engine, an exhaust gas aftertreatment system for an internal combustion engine and an internal combustion engine with the exhaust gas aftertreatment system. Background technique [0002] Especially in the case of internal combustion engines for use in off-road or off-road areas and / or at least essentially for stable operating points, it has been shown that after exhaust gases for such internal combustion engines The nitrogen oxide conversion rate at the SCR catalytic converter material of the treatment system decreases over time, in particular after prolonged full-load operation. To compensate for this, such internal combustion engines are either tuned to lower NOx-emissions (which, however, leads to reduced fuel efficiency) or they are equipped with larger, heavier and especially bulkier SCRs - Catalysts, which are expensive, with reference ...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N11/00F01N9/00
CPCF01N3/2066F01N3/208F01N9/00F01N11/00F01N11/002F01N2510/06F01N2550/02F01N2560/021F01N2560/026F01N2560/06F01N2590/08F01N2610/02F01N2610/146F01N2900/0416F01N2900/0418F01N2900/1402F01N2900/1404F02B37/18F02B37/162Y02T10/12Y02T10/40F01N9/005
Inventor K.鲁施J.N.贝尔
Owner MOTOREN & TURBINEN UNION FRIEDRICHSHAFEN GMBH
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