AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

PURPOSE:To prevent the fluctuation of air-fuel ratio characteristics due to a secular change, by a method wherein, when feedback control is made on an air-fuel ratio by means of intake secondary air, a correction value is calculated in order to correct an error in a reference value when an operating...

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Hauptverfasser: SHINCHI TAKASHI, FUJIMURA AKIRA
Format: Patent
Sprache:eng
Schlagworte:
BLASTING
COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MECHANICAL ENGINEERING
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
WEAPONS
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creator SHINCHI TAKASHI
FUJIMURA AKIRA
description PURPOSE:To prevent the fluctuation of air-fuel ratio characteristics due to a secular change, by a method wherein, when feedback control is made on an air-fuel ratio by means of intake secondary air, a correction value is calculated in order to correct an error in a reference value when an operating state under which a fluctuation in an air-fuel ratio due to the motion of a carburetter is low. CONSTITUTION:Detecting values from an intake air absolute pressure sensor 10, a crank angle sensor 11, a cooling water temperature 12, an oxygen concentration sensor 14, an atmospheric pressure sensor 17, etc. are inputted to a control circuit 20. Feedback control is effected according to an operating state through the working of an electromagnetic valve 9 located in an intake secondary air feed passage 8 bypassing a carburetter 3 to regulate an air-fuel ratio to a desired value. Only when a car does not run at highland, during no high load running state in that an intake absolute pressure exceeds a given value, when a cooling water temperature exceeds a given value, or when the opening of an electromagnetic valve 9 is below a given value, the control circuit 20 stops computation made to correct the reference value according to which feedback control is made on an air-fuel ratio.
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CONSTITUTION:Detecting values from an intake air absolute pressure sensor 10, a crank angle sensor 11, a cooling water temperature 12, an oxygen concentration sensor 14, an atmospheric pressure sensor 17, etc. are inputted to a control circuit 20. Feedback control is effected according to an operating state through the working of an electromagnetic valve 9 located in an intake secondary air feed passage 8 bypassing a carburetter 3 to regulate an air-fuel ratio to a desired value. Only when a car does not run at highland, during no high load running state in that an intake absolute pressure exceeds a given value, when a cooling water temperature exceeds a given value, or when the opening of an electromagnetic valve 9 is below a given value, the control circuit 20 stops computation made to correct the reference value according to which feedback control is made on an air-fuel ratio.</description><language>eng</language><subject>BLASTING ; COMBUSTION ENGINES ; HEATING ; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS ; LIGHTING ; MECHANICAL ENGINEERING ; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF ; WEAPONS</subject><creationdate>1987</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19871017&amp;DB=EPODOC&amp;CC=JP&amp;NR=S62237071A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19871017&amp;DB=EPODOC&amp;CC=JP&amp;NR=S62237071A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SHINCHI TAKASHI</creatorcontrib><creatorcontrib>FUJIMURA AKIRA</creatorcontrib><title>AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE</title><description>PURPOSE:To prevent the fluctuation of air-fuel ratio characteristics due to a secular change, by a method wherein, when feedback control is made on an air-fuel ratio by means of intake secondary air, a correction value is calculated in order to correct an error in a reference value when an operating state under which a fluctuation in an air-fuel ratio due to the motion of a carburetter is low. 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Only when a car does not run at highland, during no high load running state in that an intake absolute pressure exceeds a given value, when a cooling water temperature exceeds a given value, or when the opening of an electromagnetic valve 9 is below a given value, the control circuit 20 stops computation made to correct the reference value according to which feedback control is made on an air-fuel ratio.</description><subject>BLASTING</subject><subject>COMBUSTION ENGINES</subject><subject>HEATING</subject><subject>HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS</subject><subject>LIGHTING</subject><subject>MECHANICAL ENGINEERING</subject><subject>SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1987</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLBx9AzSdQt19VEIcgzx9Fdw9vcLCfL3UXBxDfN0dlVw8w9S8PQLcQ3yc_QByvk6hQYDVfkpuPq5e_q58jCwpiXmFKfyQmluBkU31xBnD93Ugvz41OKCxOTUvNSSeK-AYDMjI2NzA3NDR2Ni1AAABuwp1Q</recordid><startdate>19871017</startdate><enddate>19871017</enddate><creator>SHINCHI TAKASHI</creator><creator>FUJIMURA AKIRA</creator><scope>EVB</scope></search><sort><creationdate>19871017</creationdate><title>AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE</title><author>SHINCHI TAKASHI ; FUJIMURA AKIRA</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPS62237071A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1987</creationdate><topic>BLASTING</topic><topic>COMBUSTION ENGINES</topic><topic>HEATING</topic><topic>HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS</topic><topic>LIGHTING</topic><topic>MECHANICAL ENGINEERING</topic><topic>SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>SHINCHI TAKASHI</creatorcontrib><creatorcontrib>FUJIMURA AKIRA</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SHINCHI TAKASHI</au><au>FUJIMURA AKIRA</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE</title><date>1987-10-17</date><risdate>1987</risdate><abstract>PURPOSE:To prevent the fluctuation of air-fuel ratio characteristics due to a secular change, by a method wherein, when feedback control is made on an air-fuel ratio by means of intake secondary air, a correction value is calculated in order to correct an error in a reference value when an operating state under which a fluctuation in an air-fuel ratio due to the motion of a carburetter is low. CONSTITUTION:Detecting values from an intake air absolute pressure sensor 10, a crank angle sensor 11, a cooling water temperature 12, an oxygen concentration sensor 14, an atmospheric pressure sensor 17, etc. are inputted to a control circuit 20. Feedback control is effected according to an operating state through the working of an electromagnetic valve 9 located in an intake secondary air feed passage 8 bypassing a carburetter 3 to regulate an air-fuel ratio to a desired value. Only when a car does not run at highland, during no high load running state in that an intake absolute pressure exceeds a given value, when a cooling water temperature exceeds a given value, or when the opening of an electromagnetic valve 9 is below a given value, the control circuit 20 stops computation made to correct the reference value according to which feedback control is made on an air-fuel ratio.</abstract><oa>free_for_read</oa></addata></record>
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subjects BLASTING
COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MECHANICAL ENGINEERING
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
WEAPONS
title AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
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