System for diagnosing deterioration of catalyst

System for diagnosing deterioration of catalyst

A diagnostic system in which the accuracy of the diagnosis of the deterioration state of a catalyst in a catalytic converter for cleaning the exhaust gas of an internal combustion engine is enhanced without incurring a rise in cost. The temperature of the catalyst is estimated using the operating-st...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Mukaihara, Takashi, Ishii, Toshio, Miura, Kiyoshi, Kawano, Kazuya
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 Mukaihara, Takashi
Ishii, Toshio
Miura, Kiyoshi
Kawano, Kazuya
description A diagnostic system in which the accuracy of the diagnosis of the deterioration state of a catalyst in a catalytic converter for cleaning the exhaust gas of an internal combustion engine is enhanced without incurring a rise in cost. The temperature of the catalyst is estimated using the operating-state signal (for example, the flow rate of intake air or the width of a fuel injection pulse) of the engine by a diagnostic device. The conversion efficiency of the catalyst calculated from the outputs of oxygen sensors is corrected using the estimated temperature by the diagnostic device. The deterioration state of the catalyst is diagnosed on the basis of the corrected temperature by the diagnostic device.
format Patent
fullrecord <record><control><sourceid>uspatents_EFH</sourceid><recordid>TN_cdi_uspatents_grants_07021044</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>07021044</sourcerecordid><originalsourceid>FETCH-uspatents_grants_070210443</originalsourceid><addsrcrecordid>eNrjZNAPriwuSc1VSMsvUkjJTEzPyy_OzEtXSEktSS3KzC9KLMnMz1PIT1NITixJzAEq5WFgTUvMKU7lhdLcDApuriHOHrqlxQWJJal5JcXx6UWJIMrA3MDI0MDExJgIJQAwWSwq</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>System for diagnosing deterioration of catalyst</title><source>USPTO Issued Patents</source><creator>Mukaihara, Takashi ; Ishii, Toshio ; Miura, Kiyoshi ; Kawano, Kazuya</creator><creatorcontrib>Mukaihara, Takashi ; Ishii, Toshio ; Miura, Kiyoshi ; Kawano, Kazuya ; Hitachi, Ltd</creatorcontrib><description>A diagnostic system in which the accuracy of the diagnosis of the deterioration state of a catalyst in a catalytic converter for cleaning the exhaust gas of an internal combustion engine is enhanced without incurring a rise in cost. The temperature of the catalyst is estimated using the operating-state signal (for example, the flow rate of intake air or the width of a fuel injection pulse) of the engine by a diagnostic device. The conversion efficiency of the catalyst calculated from the outputs of oxygen sensors is corrected using the estimated temperature by the diagnostic device. The deterioration state of the catalyst is diagnosed on the basis of the corrected temperature by the diagnostic device.</description><language>eng</language><creationdate>2006</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/7021044$$EPDF$$P50$$Guspatents$$Hfree_for_read</linktopdf><link.rule.ids>230,308,776,798,881,64012</link.rule.ids><linktorsrc>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7021044$$EView_record_in_USPTO$$FView_record_in_$$GUSPTO$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Mukaihara, Takashi</creatorcontrib><creatorcontrib>Ishii, Toshio</creatorcontrib><creatorcontrib>Miura, Kiyoshi</creatorcontrib><creatorcontrib>Kawano, Kazuya</creatorcontrib><creatorcontrib>Hitachi, Ltd</creatorcontrib><title>System for diagnosing deterioration of catalyst</title><description>A diagnostic system in which the accuracy of the diagnosis of the deterioration state of a catalyst in a catalytic converter for cleaning the exhaust gas of an internal combustion engine is enhanced without incurring a rise in cost. The temperature of the catalyst is estimated using the operating-state signal (for example, the flow rate of intake air or the width of a fuel injection pulse) of the engine by a diagnostic device. The conversion efficiency of the catalyst calculated from the outputs of oxygen sensors is corrected using the estimated temperature by the diagnostic device. The deterioration state of the catalyst is diagnosed on the basis of the corrected temperature by the diagnostic device.</description><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2006</creationdate><recordtype>patent</recordtype><sourceid>EFH</sourceid><recordid>eNrjZNAPriwuSc1VSMsvUkjJTEzPyy_OzEtXSEktSS3KzC9KLMnMz1PIT1NITixJzAEq5WFgTUvMKU7lhdLcDApuriHOHrqlxQWJJal5JcXx6UWJIMrA3MDI0MDExJgIJQAwWSwq</recordid><startdate>20060404</startdate><enddate>20060404</enddate><creator>Mukaihara, Takashi</creator><creator>Ishii, Toshio</creator><creator>Miura, Kiyoshi</creator><creator>Kawano, Kazuya</creator><scope>EFH</scope></search><sort><creationdate>20060404</creationdate><title>System for diagnosing deterioration of catalyst</title><author>Mukaihara, Takashi ; Ishii, Toshio ; Miura, Kiyoshi ; Kawano, Kazuya</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-uspatents_grants_070210443</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2006</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Mukaihara, Takashi</creatorcontrib><creatorcontrib>Ishii, Toshio</creatorcontrib><creatorcontrib>Miura, Kiyoshi</creatorcontrib><creatorcontrib>Kawano, Kazuya</creatorcontrib><creatorcontrib>Hitachi, Ltd</creatorcontrib><collection>USPTO Issued Patents</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Mukaihara, Takashi</au><au>Ishii, Toshio</au><au>Miura, Kiyoshi</au><au>Kawano, Kazuya</au><aucorp>Hitachi, Ltd</aucorp><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>System for diagnosing deterioration of catalyst</title><date>2006-04-04</date><risdate>2006</risdate><abstract>A diagnostic system in which the accuracy of the diagnosis of the deterioration state of a catalyst in a catalytic converter for cleaning the exhaust gas of an internal combustion engine is enhanced without incurring a rise in cost. The temperature of the catalyst is estimated using the operating-state signal (for example, the flow rate of intake air or the width of a fuel injection pulse) of the engine by a diagnostic device. The conversion efficiency of the catalyst calculated from the outputs of oxygen sensors is corrected using the estimated temperature by the diagnostic device. The deterioration state of the catalyst is diagnosed on the basis of the corrected temperature by the diagnostic device.</abstract><oa>free_for_read</oa></addata></record>
fulltext fulltext_linktorsrc
identifier
ispartof
issn
language eng
recordid cdi_uspatents_grants_07021044
source USPTO Issued Patents
title System for diagnosing deterioration of catalyst
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-19T08%3A07%3A34IST&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=Mukaihara,%20Takashi&rft.aucorp=Hitachi,%20Ltd&rft.date=2006-04-04&rft_id=info:doi/&rft_dat=%3Cuspatents_EFH%3E07021044%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