FUEL ADDITION CONTROL METHOD APPLIED TO EXHAUST EMISSION PURIFIER OF INTERNAL COMBUSTION ENGINE, AND EXHAUST EMISSION PURIFIER

An exhaust emission purifier which can perform fuel addition to an exhaust purification catalyst quickly when it is requested while suppressing overheat of the exhaust purification catalyst. The exhaust emission purifier of an internal combustion engine comprises an exhaust purification catalyst (8)...

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Main Authors FUKUDA, KOICHIRO, AOYAMA, TARO
Format Patent
LanguageEnglish
French
Japanese
Published 29.11.2007
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Abstract An exhaust emission purifier which can perform fuel addition to an exhaust purification catalyst quickly when it is requested while suppressing overheat of the exhaust purification catalyst. The exhaust emission purifier of an internal combustion engine comprises an exhaust purification catalyst (8) for purifying exhaust emission of the internal combustion engine (1), and a valve (10) for adding fuel from the upstream of the exhaust purification catalyst (8), wherein a period combining the interval for adding fuel from the fuel addition valve (10) with a pause interval for stopping fuel addition is repeated in order to control the exhaust purification catalyst (8) to a target temperature, and the fuel addition valve (10) is operated such that the pause intervals are provided to sandwich the addition interval between them in the period. Length of the pause interval provided before the addition interval is altered depending on the temperature of the exhaust purification catalyst (8) at the start point (P1) of the period. La présente invention concerne un purificateur d'émission d'échappement qui peut effectuer une addition de combustible sur un catalyseur de purification d'échappement de manière rapide sur demande tout en supprimant la surchauffe du catalyseur de purification d'échappement. Le purificateur d'émission d'échappement d'un moteur à combustion interne comprend un catalyseur de purification d'échappement (8) pour purifier l'émission d'échappement du moteur à combustion interne (1), et une valve (10) pour additionner le combustible provenant en amont du catalyseur de purification d'échappement (8), où une période combinant l'intervalle pour additionner le combustible provenant de la valve d'addition de combustible (10) à un intervalle de pause pour arrêter l'addition de combustible est répétée afin de réguler le catalyseur de purification d'échappement (8) à une température cible, et la valve d'addition de combustible (10) est actionnée de telle sorte que les intervalles de pause soient donnés afin de coincer l'intervalle d'addition dans la période. La longueur de l'intervalle de pause donné avant l'intervalle d'addition est modifiée en fonction de la température du catalyseur de purification d'échappement (8) au point de départ (P1) de la période.
AbstractList An exhaust emission purifier which can perform fuel addition to an exhaust purification catalyst quickly when it is requested while suppressing overheat of the exhaust purification catalyst. The exhaust emission purifier of an internal combustion engine comprises an exhaust purification catalyst (8) for purifying exhaust emission of the internal combustion engine (1), and a valve (10) for adding fuel from the upstream of the exhaust purification catalyst (8), wherein a period combining the interval for adding fuel from the fuel addition valve (10) with a pause interval for stopping fuel addition is repeated in order to control the exhaust purification catalyst (8) to a target temperature, and the fuel addition valve (10) is operated such that the pause intervals are provided to sandwich the addition interval between them in the period. Length of the pause interval provided before the addition interval is altered depending on the temperature of the exhaust purification catalyst (8) at the start point (P1) of the period. La présente invention concerne un purificateur d'émission d'échappement qui peut effectuer une addition de combustible sur un catalyseur de purification d'échappement de manière rapide sur demande tout en supprimant la surchauffe du catalyseur de purification d'échappement. Le purificateur d'émission d'échappement d'un moteur à combustion interne comprend un catalyseur de purification d'échappement (8) pour purifier l'émission d'échappement du moteur à combustion interne (1), et une valve (10) pour additionner le combustible provenant en amont du catalyseur de purification d'échappement (8), où une période combinant l'intervalle pour additionner le combustible provenant de la valve d'addition de combustible (10) à un intervalle de pause pour arrêter l'addition de combustible est répétée afin de réguler le catalyseur de purification d'échappement (8) à une température cible, et la valve d'addition de combustible (10) est actionnée de telle sorte que les intervalles de pause soient donnés afin de coincer l'intervalle d'addition dans la période. La longueur de l'intervalle de pause donné avant l'intervalle d'addition est modifiée en fonction de la température du catalyseur de purification d'échappement (8) au point de départ (P1) de la période.
Author FUKUDA, KOICHIRO
AOYAMA, TARO
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DocumentTitleAlternate PROCÉDÉ DE RÉGULATION DE L'ADDITION DE COMBUSTIBLE APPLIQUÉ AU PURIFICATEUR D'ÉMISSION D'ÉCHAPPEMENT D'UN MOTEUR À COMBUSTION INTERNE ET PURIFICATEUR D'ÉMISSION D'ÉCHAPPEMENT
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RelatedCompanies TOYOTA JIDOSHA KABUSHIKI KAISHA
FUKUDA, KOICHIRO
AOYAMA, TARO
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Snippet An exhaust emission purifier which can perform fuel addition to an exhaust purification catalyst quickly when it is requested while suppressing overheat of the...
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SubjectTerms BLASTING
CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION
ENGINE PLANTS IN GENERAL
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
STEAM ENGINES
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
TRANSPORTING
WEAPONS
Title FUEL ADDITION CONTROL METHOD APPLIED TO EXHAUST EMISSION PURIFIER OF INTERNAL COMBUSTION ENGINE, AND EXHAUST EMISSION PURIFIER
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