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1. WO2014119026 - 内燃機関の制御装置

公開番号 WO/2014/119026
公開日 07.08.2014
国際出願番号 PCT/JP2013/068674
国際出願日 08.07.2013
IPC
F02D 41/14 2006.01
F機械工学;照明;加熱;武器;爆破
02燃焼機関;熱ガスまたは燃焼生成物を利用する機関設備
D燃焼機関の制御
41燃焼可能な混合気またはその成分の供給の電気的制御
02制御信号を発生する回路装置
14閉ループ補正を導入するもの
F02D 45/00 2006.01
F機械工学;照明;加熱;武器;爆破
02燃焼機関;熱ガスまたは燃焼生成物を利用する機関設備
D燃焼機関の制御
45グループF02D41/00~F02D43/00に分類されない電気的制御
CPC
F01N 11/007
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
11Monitoring or diagnostic devices for exhaust-gas treatment apparatus ; , e.g. for catalytic activity
007the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
F01N 2430/06
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
2430Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
06by varying fuel-air ratio, e.g. by enriching fuel-air mixture
F01N 2560/025
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
2560Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
02the means being an exhaust gas sensor
025for measuring or detecting O2, e.g. lambda sensors
F01N 2900/0408
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
2900Details of electrical control or of the monitoring of the exhaust gas treating apparatus
04Methods of control or diagnosing
0408using a feed-back loop
F01N 2900/1402
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
2900Details of electrical control or of the monitoring of the exhaust gas treating apparatus
06Parameters used for exhaust control or diagnosing
14said parameters being related to the exhaust gas
1402Exhaust gas composition
F01N 2900/1624
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
2900Details of electrical control or of the monitoring of the exhaust gas treating apparatus
06Parameters used for exhaust control or diagnosing
16said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
1624Catalyst oxygen storage capacity
出願人
  • トヨタ自動車株式会社 TOYOTA JIDOSHA KABUSHIKI KAISHA [JP]/[JP] (AllExceptUS)
  • 青木 圭一郎 AOKI, Keiichiro [JP]/[JP] (US)
発明者
  • 青木 圭一郎 AOKI, Keiichiro
代理人
  • 青木 篤 AOKI, Atsushi
優先権情報
2013-01455429.01.2013JP
公開言語 (言語コード) 日本語 (JA)
出願言語 (言語コード) 日本語 (JA)
指定国 (国コード)
発明の名称
(EN) CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
(FR) DISPOSITIF DE COMMANDE POUR MOTEUR À COMBUSTION INTERNE
(JA) 内燃機関の制御装置
要約
(EN)
 This control device for an internal combustion engine includes: an exhaust purification catalyst (20) that is provided in an exhaust passage of the internal combustion engine; a downstream air-fuel ratio sensor (41) that is provided downstream of the exhaust purification catalyst; and an air-fuel ratio control device that controls such that the air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst reaches a target air-fuel ratio. The downstream air-fuel ratio sensor is configured such that the applied voltage thereof at which the output current becomes zero decreases as the exhaust air-fuel ratio increases. If the target air-fuel ratio is richer than the reference air-fuel ratio, the voltage applied to the downstream air-fuel ratio sensor is set to a higher voltage than the voltage at which the output current becomes zero when the exhaust air-fuel ratio is the stoichiometric air-fuel ratio. If the target air-fuel ratio is leaner than the reference air-fuel ratio, the voltage applied to the downstream air-fuel ratio sensor is set to a lower voltage than the voltage at which the output current becomes zero when the exhaust air-fuel ratio is the stoichiometric air-fuel ratio. A control device for an internal combustion engine using an air-fuel ratio sensor that can reliably detect when the absolute value of the exhaust air-fuel ratio reaches a prescribed air-fuel ratio richer than the stoichiometric air-fuel ratio is thus provided.
(FR)
Ce dispositif de commande pour moteur à combustion interne comprend : un catalyseur de purification d'échappement (20) qui est ménagé dans un passage d'échappement du moteur à combustion interne ; un capteur du rapport air-combustible (41) qui est ménagé en aval du catalyseur de purification d'échappement ; et un dispositif de commande du rapport air-combustible qui effectue une commande de façon que le rapport air-combustible du gaz d'échappement s'écoulant dans le catalyseur de purification d'échappement atteigne un rapport air-combustible cible. Le capteur aval du rapport air-combustible est conçu de sorte que la tension appliquée de celui-ci, à laquelle le courant de sortie atteint zéro, diminue lorsque le rapport air-combustible d'échappement augmente. Si le rapport air-combustible cible est plus riche que le rapport air-combustible de référence, la tension appliquée au capteur aval du rapport air-combustible est établie à une tension supérieure à la tension à laquelle le courant de sortie atteint zéro lorsque le rapport air-combustible d'échappement est le rapport air-combustible stoïchiométrique. Si le rapport air-combustible cible est plus pauvre que le rapport air-combustible de référence, la tension appliquée au capteur aval du rapport air-combustible est établie à une tension inférieure à la tension à laquelle le courant de sortie atteint zéro lorsque le rapport air-combustible d'échappement est le rapport air-combustible stoïchiométrique. L'invention concerne également un dispositif de commande d'un moteur à combustion interne utilisant un capteur de rapport air-combustible qui peut détecter de manière fiable lorsque la valeur absolue du rapport air -combustible d'échappement atteint un rapport air-combustible réglementé plus riche que le rapport air-combustible stoïchiométrique.
(JA)
 内燃機関の制御装置は、内燃機関の排気通路に設けられた排気浄化触媒(20)と、排気浄化触媒よりも下流側に設けられた下流側空燃比センサ(41)と、排気浄化触媒に流入する排気ガスの空燃比が目標空燃比となるように制御する空燃比制御装置とを具備する。下流側空燃比センサは、排気空燃比が高くなるほど出力電流が零となる印加電圧が低くなるように構成されている。下流側空燃比センサへの印加電圧は、目標空燃比が基準空燃比よりもリッチであるときには、排気空燃比が理論空燃比であるときに出力電流が零となる電圧よりも高い電圧とされ、目標空燃比が基準空燃比よりもリーンであるときには、排気空燃比が理論空燃比であるときに出力電流が零となる電圧よりも低い電圧とされる。これにより、排気空燃比の絶対値が理論空燃比よりもリッチな所定の空燃比となったときを正確に検出することができる空燃比センサを用いた内燃機関の制御装置が提供される。
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