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1. WO2006095908 - FUEL JETTING CONTROL UNIT FOR INTERNAL COMBUSTION ENGINE

Publication Number WO/2006/095908
Publication Date 14.09.2006
International Application No. PCT/JP2006/305066
International Filing Date 08.03.2006
IPC
F02D 41/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
F02D 21/08 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
21Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
06peculiar to engines having other non-fuel gas added to combustion-air
08the other gas being the exhaust gas of engine
F02D 41/14 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
14Introducing closed-loop corrections
F02D 45/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
45Electrical control not provided for in groups F02D41/-F02D43/98
F02M 25/07 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
25Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
06adding lubricant vapours
07adding exhaust gases
CPC
F02D 2250/38
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
2250Engine control related to specific problems or objectives
38Control for minimising smoke emissions, e.g. by applying smoke limitations on the fuel injection amount
F02D 41/0065
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
0025Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
0047Controlling exhaust gas recirculation [EGR]
0065Specific aspects of external EGR control
F02D 41/144
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
14Introducing closed-loop corrections
1438using means for determining characteristics of the combustion gases; Sensors therefor
1439characterised by the position of the sensor
144Sensor in intake manifold
F02D 41/1456
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
14Introducing closed-loop corrections
1438using means for determining characteristics of the combustion gases; Sensors therefor
1444characterised by the characteristics of the combustion gases
1454the characteristics being an oxygen content or concentration or the air-fuel ratio
1456with sensor output signal being linear or quasi-linear with the concentration of oxygen
F02M 26/05
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
26Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
02EGR systems specially adapted for supercharged engines
04with a single turbocharger
05High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
F02M 26/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
26Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
02EGR systems specially adapted for supercharged engines
09Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
10having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
Applicants
  • トヨタ自動車株式会社 TOYOTA JIDOSHA KABUSHIKI KAISHA [JP]/[JP] (AllExceptUS)
  • 松永 彰生 MATSUNAGA, Akio [JP]/[JP] (UsOnly)
Inventors
  • 松永 彰生 MATSUNAGA, Akio
Agents
  • 山本 晃司 YAMAMOTO, Koji
Priority Data
2005-06555109.03.2005JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) FUEL JETTING CONTROL UNIT FOR INTERNAL COMBUSTION ENGINE
(FR) UNITE DE REGULATION DE LA PROJECTION DE CARBURANT POUR MOTEUR A COMBUSTION INTERNE
(JA) 内燃機関の燃料噴射制御装置
Abstract
(EN)
This invention provides a fuel jetting control unit for an internal combustion engine that can improve the accuracy of combustion control regarding smoke suppression. The fuel jetting control unit is applied to an engine provided with an EGR device for returning, as a part of an intake gas flown into the cylinder, an EGR gas, withdrawn from an exhaust passage, to an air intake passage. The amount of oxygen OXM contained in the intake gas and the concentration of oxygen OXC contained in the intake gas are detected (steps S1 and S2). The smoke threshold limit value QOXMLMT as the upper limit of the fuel jetting amount, which can suppress the amount of smoke generated in the engine to a predetermined tolerance range, is set based on the detected oxygen amount and oxygen concentration (step S4), and, when the required jetting amount QDMD determined based on operation conditions is larger than the threshold limit value QOXMLMT, the instructed jetting amount QFIN is limited to the threshold limit value QOXMLMT.
(FR)
La présente invention concerne une unité de régulation de la projection de carburant pour moteur à combustion interne, capable d'améliorer la précision de la régulation de combustion en ce qui concerne l'élimination des fumées. L'unité de régulation de la projection de carburant est appliquée à un moteur muni d'un dispositif de recirculation des gaz d'échappement (RGE) destiné à renvoyer, au sein des gaz d'admission entrant dans le cylindre, un gaz de RGE, dévié depuis un passage d'échappement vers un passage d'air d'admission. La quantité d'oxygène OXM contenue dans le gaz d'admission et la concentration d'oxygène OXC contenue dans le gaz d'admission sont détectées (étapes S1 et S2). La valeur limite de seuil de fumées QOXMLMT, en tant que limite supérieure de la quantité de carburant projeté, capable de limiter la quantité de fumée générée dans le moteur à un intervalle de tolérance prédéterminé, est fixée sur la base de la quantité d'oxygène et de la concentration d'oxygène détectées (étape S4) et, lorsque la quantité de carburant à projeter QDMD déterminée sur la base des conditions de fonctionnement est supérieure à la valeur limite de seuil QOXMLMT, la quantité de carburant à projeter prescrite QFIN est limitée à la valeur limite de seuil QOXMLMT.
(JA)
 スモークの抑制に関する燃焼制御の精度を従来よりも向上させることが可能な内燃機関の燃料噴射制御装置を提供する。排気通路から取り出されたEGRガスを筒内へ流入する吸入ガスの一部として吸気通路に還流させるEGR装置を備えたエンジンに適用される燃料噴射制御装置において、吸入ガスに含まれる酸素量OXM、及び吸入ガスに含まれる酸素の濃度OXCをそれぞれ検出する(ステップS1、S2)。エンジンのスモーク発生量を所定の許容範囲に抑え得る燃料噴射量の上限値としてのスモーク許容限界量QOXMLMTを、検出された酸素量及び酸素濃度に基づいて設定し(ステップS4)、運転状態に基づいて決定された要求噴射量QDMDがその限界量QOXMLMTよりも大きい場合に指令噴射量QFINを限界量QOXMLMTに制限する。
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