Method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine

Method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine

The invention relates to a method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added to the exhaust gas upstream of a denitrification catalytic converter, as seen in exhaust gas flow direction, and is metered as a...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Dölling, Winfried, Hofmann, Lothar
Format: Patent
Sprache:eng
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page
container_issue
container_start_page
container_title
container_volume
creator Dölling, Winfried
Hofmann, Lothar
description The invention relates to a method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added to the exhaust gas upstream of a denitrification catalytic converter, as seen in exhaust gas flow direction, and is metered as a function of a nitrogen oxide concentration. A method is provided for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added in a controlled manner upstream of a denitrification catalyst, as seen in exhaust gas flow direction, and in dependence on a nitrogen oxide concentration. The reducing agent is added in a superstoichiometric amount in relation to the nitrogen oxide content if an operating parameter and/or a value derived from the operating parameter falls below or exceeds a threshold value. The addition of the reducing agent is then terminated or continued in a substoichiometric manner. The invention provides a measure for obtaining an extremely high average nitrogen oxide conversion, especially under varying operating conditions of the internal combustion engine.
format Patent
fullrecord <record><control><sourceid>uspatents_EFH</sourceid><recordid>TN_cdi_uspatents_grants_06470676</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>06470676</sourcerecordid><originalsourceid>FETCH-uspatents_grants_064706763</originalsourceid><addsrcrecordid>eNqNjEEKwjAQRbtxIeod5gJCQUkPIIobd-5lbKbJQJ1IZir19ibiAVz9D-_9v2zsQhaThyFlsEjQo-H4Nu6hT_KirJwE0gDCllOg0mf2pJUaspAHlu-Q5oiTGgTU6qMUYJQFx-I-7gXVJ5JQRutmMeCotPnlqoHT8Xo4byd9opGY3kLGGq3bd63r3O4P5QM6kUXp</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine</title><source>USPTO Issued Patents</source><creator>Dölling, Winfried ; Hofmann, Lothar</creator><creatorcontrib>Dölling, Winfried ; Hofmann, Lothar ; Siemens Aktiengesellschaft</creatorcontrib><description>The invention relates to a method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added to the exhaust gas upstream of a denitrification catalytic converter, as seen in exhaust gas flow direction, and is metered as a function of a nitrogen oxide concentration. A method is provided for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added in a controlled manner upstream of a denitrification catalyst, as seen in exhaust gas flow direction, and in dependence on a nitrogen oxide concentration. The reducing agent is added in a superstoichiometric amount in relation to the nitrogen oxide content if an operating parameter and/or a value derived from the operating parameter falls below or exceeds a threshold value. The addition of the reducing agent is then terminated or continued in a substoichiometric manner. The invention provides a measure for obtaining an extremely high average nitrogen oxide conversion, especially under varying operating conditions of the internal combustion engine.</description><language>eng</language><creationdate>2002</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6470676$$EPDF$$P50$$Guspatents$$Hfree_for_read</linktopdf><link.rule.ids>230,308,780,802,885,64039</link.rule.ids><linktorsrc>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6470676$$EView_record_in_USPTO$$FView_record_in_$$GUSPTO$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Dölling, Winfried</creatorcontrib><creatorcontrib>Hofmann, Lothar</creatorcontrib><creatorcontrib>Siemens Aktiengesellschaft</creatorcontrib><title>Method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine</title><description>The invention relates to a method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added to the exhaust gas upstream of a denitrification catalytic converter, as seen in exhaust gas flow direction, and is metered as a function of a nitrogen oxide concentration. A method is provided for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added in a controlled manner upstream of a denitrification catalyst, as seen in exhaust gas flow direction, and in dependence on a nitrogen oxide concentration. The reducing agent is added in a superstoichiometric amount in relation to the nitrogen oxide content if an operating parameter and/or a value derived from the operating parameter falls below or exceeds a threshold value. The addition of the reducing agent is then terminated or continued in a substoichiometric manner. The invention provides a measure for obtaining an extremely high average nitrogen oxide conversion, especially under varying operating conditions of the internal combustion engine.</description><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2002</creationdate><recordtype>patent</recordtype><sourceid>EFH</sourceid><recordid>eNqNjEEKwjAQRbtxIeod5gJCQUkPIIobd-5lbKbJQJ1IZir19ibiAVz9D-_9v2zsQhaThyFlsEjQo-H4Nu6hT_KirJwE0gDCllOg0mf2pJUaspAHlu-Q5oiTGgTU6qMUYJQFx-I-7gXVJ5JQRutmMeCotPnlqoHT8Xo4byd9opGY3kLGGq3bd63r3O4P5QM6kUXp</recordid><startdate>20021029</startdate><enddate>20021029</enddate><creator>Dölling, Winfried</creator><creator>Hofmann, Lothar</creator><scope>EFH</scope></search><sort><creationdate>20021029</creationdate><title>Method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine</title><author>Dölling, Winfried ; Hofmann, Lothar</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-uspatents_grants_064706763</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2002</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Dölling, Winfried</creatorcontrib><creatorcontrib>Hofmann, Lothar</creatorcontrib><creatorcontrib>Siemens Aktiengesellschaft</creatorcontrib><collection>USPTO Issued Patents</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Dölling, Winfried</au><au>Hofmann, Lothar</au><aucorp>Siemens Aktiengesellschaft</aucorp><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine</title><date>2002-10-29</date><risdate>2002</risdate><abstract>The invention relates to a method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added to the exhaust gas upstream of a denitrification catalytic converter, as seen in exhaust gas flow direction, and is metered as a function of a nitrogen oxide concentration. A method is provided for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine. A reducing agent is added in a controlled manner upstream of a denitrification catalyst, as seen in exhaust gas flow direction, and in dependence on a nitrogen oxide concentration. The reducing agent is added in a superstoichiometric amount in relation to the nitrogen oxide content if an operating parameter and/or a value derived from the operating parameter falls below or exceeds a threshold value. The addition of the reducing agent is then terminated or continued in a substoichiometric manner. The invention provides a measure for obtaining an extremely high average nitrogen oxide conversion, especially under varying operating conditions of the internal combustion engine.</abstract><oa>free_for_read</oa></addata></record>
fulltext fulltext_linktorsrc
identifier
ispartof
issn
language eng
recordid cdi_uspatents_grants_06470676
source USPTO Issued Patents
title Method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-28T14%3A11%3A09IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-uspatents_EFH&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=D%C3%B6lling,%20Winfried&rft.aucorp=Siemens%20Aktiengesellschaft&rft.date=2002-10-29&rft_id=info:doi/&rft_dat=%3Cuspatents_EFH%3E06470676%3C/uspatents_EFH%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true