Method and apparatus for reducing nitrogen oxide and ammonia emissions in an exhaust aftertreatment system of an internal combustion engine during load changing

A technology of nitrogen oxides and internal combustion engines, applied in the electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, exhaust treatment, etc., can solve problems that have not been described, to avoid ammonia slippage and reduce nitrogen The effect of oxide emissions

Active Publication Date: 2016-03-02
ROBERT BOSCH GMBH
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Problems solved by technology

However, the predictive detection of transients in the operation of the internal combustion engine for the optimization of the reducing agent metering is not described

Method used

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  • Method and apparatus for reducing nitrogen oxide and ammonia emissions in an exhaust aftertreatment system of an internal combustion engine during load changing
  • Method and apparatus for reducing nitrogen oxide and ammonia emissions in an exhaust aftertreatment system of an internal combustion engine during load changing
  • Method and apparatus for reducing nitrogen oxide and ammonia emissions in an exhaust aftertreatment system of an internal combustion engine during load changing

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Embodiment Construction

[0029] figure 1 By way of example, a technical environment is shown in which the method according to the invention can be used. In this case, the illustrations are limited to the components necessary for the explanation of the invention. An internal combustion engine 1 designed as a diesel engine is shown as an example, comprising a motor block 10 and an exhaust duct 30 in which an exhaust gas flow 20 is guided. The exhaust tract 30 has an exhaust gas purification device which, in the example shown, firstly has a diesel oxidation catalyst 40 as a catalytically coated component arranged in the flow direction of the exhaust gas. (DOC) and Diesel Particulate Filter 50 (DPF). Followed by an SCR catalyst 80 , upstream of which a reducing agent can be introduced by means of a metering unit 110 for reducing nitrogen oxides in the exhaust gas flow. To monitor the nitrogen oxide concentration in the exhaust gas, an exhaust gas sensor 90 designed as a nitrogen oxide sensor is inserte...

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Abstract

The invention relates to a method and an apparatus for the reduction of nitrogen oxide emissions in the exhaust of an internal combustion engine, wherein in a powered with the internal combustion engine vehicle data to a route in a navigation system and / or at least one driver assistance system can be provided. According to the invention, Ss is provided that even in transient operating conditions of the engine from the data of the expected route, an engine-load profile and thus a nitrogen oxide emission of the internal combustion engine, a nitrogen oxide conversion of the catalyst and / or a need of the metered for nitrogen oxide reduction are predicted and this data are considered correctively in the dosage of Reduktionsmittell or the timing and duration of loading and regeneration phase of the NOx storage catalytic converter can be influenced.

Description

technical field [0001] The invention relates to a method for reducing the emission of nitrogen oxides in the exhaust gas of an internal combustion engine which has a catalytic converter in its exhaust tract and in which the nitrogen oxide reduction is carried out along the direction of flow of the exhaust gas in such a way that The catalytic converter of the SCR catalytic converter doses the reducing agent solution that dissociates ammonia to the exhaust gas flow by means of a metering unit, or stores nitrogen oxides in the charging phase with the lean-regulated exhaust gas to the catalytic converter configured as a NOx storage in the catalytic converter, and in the subsequent regeneration phase (Regenerations phase) with densely adjusted exhaust gas, the nitrogen oxides are discharged and converted into nitrogen and water, wherein the In vehicles operated with the internal combustion engine described above, data about the route are provided in a navigation system and / or in at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N9/00F01N11/00F01N3/10
CPCF01N3/0842F01N3/0871F01N3/2066F01N3/208F01N2610/02F01N2900/12F01N2900/1621F01N2900/1622Y02A50/20Y02T10/12
Inventor U.舒尔茨J-J.吕格尔
Owner ROBERT BOSCH GMBH
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