WO2013004898A1 - Moteur à combustion interne et son procédé de fonctionnement - Google Patents

Moteur à combustion interne et son procédé de fonctionnement Download PDF

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Publication number
WO2013004898A1
WO2013004898A1 PCT/FI2012/050666 FI2012050666W WO2013004898A1 WO 2013004898 A1 WO2013004898 A1 WO 2013004898A1 FI 2012050666 W FI2012050666 W FI 2012050666W WO 2013004898 A1 WO2013004898 A1 WO 2013004898A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
internal combustion
turbocharger unit
inlet
combustion engine
Prior art date
Application number
PCT/FI2012/050666
Other languages
English (en)
Inventor
Matias BEIJAR
Diego Delneri
Riccardo Valente
Anders ÖSTER
Original Assignee
Wärtsilä Finland Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wärtsilä Finland Oy filed Critical Wärtsilä Finland Oy
Priority to CN201280032407.1A priority Critical patent/CN103890367B/zh
Priority to JP2014517858A priority patent/JP5908075B2/ja
Priority to RU2014103452/06A priority patent/RU2014103452A/ru
Priority to KR1020147002279A priority patent/KR101566133B1/ko
Priority to EP12759787.0A priority patent/EP2726726B1/fr
Publication of WO2013004898A1 publication Critical patent/WO2013004898A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/24—Layout, e.g. schematics with two or more coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters

Definitions

  • the invention relates to an internal combustion engine comprising an inlet gas conduit system, and an exhaust gas system; a first turbo- charger unit, a turbine part thereof arranged in connection with the exhaust gas system and a compressor part thereof arranged in connection with the inlet gas conduit system to pressurize the oxygen containing combustion gas by means of the energy of the exhaust gas of the engine, a second turbocharger unit, a turbine part thereof is arranged in connection with the exhaust gas system the inlet of which turbine part is coupled parallel with the turbine part of the first turbocharger unit and a compressor part the inlet of which is arranged in connection with the exhaust gas system and the outlet of which arranged in connection with the inlet gas conduit system via an exhaust gas recirculation conduit system, the compressor part being arranged to pressurize recirculated portion of the exhaust gas by means of the energy of exhaust gas of the engine.
  • Invention relates to method of operating an internal combustion engine in which combustion air is introduced to the engine through an inlet gas conduit and the air is supercharged by a first turbocharger unit by making use of energy of the exhaust gases of the engine arranged to flow in and exhaust gas system, and a controllable amount of exhaust gas is recir- culated to the inlet gas conduit system and back to the combustion process of the engine, in which method the recirculation of the exhaust gas is assisted by means of a second turbocharger unit, and in which method the exhaust gas of the engine is divided into two partial streams the first partial stream is led to a turbine part of the first turbocharger unit and the second partial stream is led to a turbine part of the second turbocharger unit.
  • Background art
  • Turbochargers are well-known for supplying air to the intake of an internal combustion engine at pressures above ambient pressure.
  • a turbocharger comprises an exhaust gas driven turbine wheel mounted on a rotatable shaft within a turbine housing. Rotation of the turbine wheel rotates a compressor wheel mounted on the other end of the shaft within a compressor housing. The compressor wheel produces compressed air to the intake manifold of the engine, thereby increasing engine power.
  • the turbine may be of a fixed or variable geometry type. Variable geometry turbines differ from fixed geometry turbines in that the size or function of the inlet passageway can be varied to control the gas introduction into the turbine so that the power output of the turbine can be varied to suite varying engine demands.
  • NOx nitrogen oxides
  • EGR exhaust gas recirculation
  • a portion of the engine's ex- haust gas is recirculated back to the combustion chambers of the engine. This is typically achieved by directing an amount of the exhaust gas from the exhaust manifold to the inlet manifold of the engine. This is commonly called as external recirculation.
  • the recirculated exhaust gas lowers the peak temperature produced during combustion. As NOx production in- creases with increased peak temperature, recirculation of exhaust gas reduces the amount of undesirable NOx formed.
  • Turbochargers may form part of the EGR system.
  • the EGR system for an engine with a turbocharger com- prises a second turbocharger which operates in parallel with the main turbocharger.
  • the second turbocharger herein referred to as the EGR turbocharger, has a turbine part, which is powered by a portion of the engine exhaust.
  • the compressor part of the turbocharger is arranged to feed a por- tion of the engine exhaust gas, after pressurising the exhaust gas, to the inlet manifold of the engine.
  • the turbine part of the EGR turbocharger drives the EGR turbocharger's compressor part so that the EGR turbocharger feeds a portion of engine exhaust gas to the engine intake.
  • a problem relating to exhaust gas recirculation by means of an EGR turbocharger is that the EGR turbocharger utilizes the very same source of energy which is utilized in the main turbocharger unit of the engine and thus controlling its operation has an effect also on the engine's main turbocharger.
  • an internal combustion engine comprising an inlet gas conduit system, and an exhaust gas system, a first turbocharger unit, a turbine part thereof arranged in connection with the exhaust gas system and a compressor part thereof arranged in connection with the inlet gas conduit system to pressurize the oxygen con- taining combustion gas by means of the energy of the exhaust gas of the engine, a second turbocharger unit, a turbine part thereof is arranged in connection with the exhaust gas system the inlet of which turbine part is coupled parallel with the turbine part of the first turbocharger unit and a compressor part the inlet of which is arranged in connection with the ex- haust gas system and the outlet of which arranged in connection with the inlet gas conduit system via an exhaust gas recirculation conduit system, the compressor part being arranged to pressurize recirculated portion of the exhaust gas by means of the energy of exhaust gas of the engine. It is characteristic to the invention that the inlet of the turbine part of the second turbocharger unit is connected
  • the exhaust gas recirculation conduit system comprises a control circuit leading from upstream side of the compressor part to downstream side of the compressor part of the second turbocharger unit, which control circuit is provided with a second control valve.
  • control circuit By means of the control circuit it is possible to minimize the power demand of the compressor part of the second turbocharger unit particularly when the first control valve is throttled down.
  • the exhaust gas recir- culation conduit system comprises a valve arranged between an outlet the compressor part of the second turbocharger unit and the inlet gas conduit system.
  • the valve By means of the valve the recirculation may be controlled or totally shut off.
  • the exhaust gas recirculation conduit system comprises a first gas cooler unit arranged upstream the compressor part.
  • the control circuit is provided with a second gas cooler unit. By means of the second gas cooler unit the temperature gas flowing in the control circuit may be controlled.
  • control system of the engine is arranged to throttle down the first control valve during engine's load increase.
  • the first turbocharger unit is provided with a waste-gate and that the engine is provided with a control system which is arranged to throttle down the first control valve dur- ing engine's load increase and when the waste-gate is closed.
  • the turbine part of first turbocharger unit and the turbine part of the second turbocharger unit are arranged parallel in to the exhaust gas system.
  • Objects of the invention are also met by method of operating an in- ternal combustion engine in which combustion air is introduced to the engine through an inlet gas conduit and the air is supercharged by a first turbocharger unit by making use of energy of the exhaust gases of the engine arranged to flow in and exhaust gas system, and a controllable amount of exhaust gas is recirculated to the inlet gas conduit system and back to the combustion process of the engine, in which method the recirculation of the exhaust gas is assisted by means of a second turbocharger unit, and in which method the exhaust gas of the engine is divided into two partial streams the first partial stream is led to a turbine part of the first turbocharger unit and the second partial stream is led to a turbine part of the se- cond turbocharger unit.
  • the operation of the second turbocharger unit is controlled by controlling the flow rate of the second partial stream by means of controlling a throttling effect of a first control valve arranged between the inlet of the turbine part of the second turbocharger unit and the exhaust gas system.
  • power of the first turbocharger unit is temporarily increased by temporarily throttling the flow rate of the second partial stream to the turbine part of the second turbocharger unit.
  • operation of the compressor part of the second turbocharger is controlled by routing a controlled amount of the compressed gas back to the inlet side of the compressor part via a control circuit leading from upstream side of the compressor part to downstream side of the compressor part.
  • the flow rate of the second partial stream to the turbine part of the second turbocharger unit is controlled to maintain the rotational speed of the second turbocharger at preset level.
  • the recirculation of the exhaust gas is temporarily shut off during the throttling of the flow rate of the second partial stream.
  • Figure 1 depicts schematically an internal combustion engine 1 according to an embodiment of the invention.
  • the engine comprises a body 2 in which several cylinders 4 are arranged with in-line arrangement.
  • the engine further comprises an inlet gas conduit system 6 coupled to an inlet channel 8 of each cylinder 4 of the engine 1 .
  • the inlet gas conduit system is arranged for conveying inlet gas, typically air, to the combustion chambers of the engine.
  • the engine comprises also an exhaust gas system 10 and an exhaust gas recirculation conduit 12 system connecting the exhaust gas conduit system 10 with the inlet gas conduit system 6.
  • the inlet gas conduit system 6 comprises firstly a combustion gas manifold 14 through which the oxygen con- taining gas needed for combustion process may be delivered to each of the cylinders of the engine.
  • the combustion gas is the air but it should be noted that the operation of the engine according to the invention may be practised by means of the any desired oxygen containing gas.
  • Each of the cylinders 4 or the engine is provided with an inlet channel 24, which con- nects the combustion gas manifold to the cylinders.
  • the combustion gas manifold 14 connected to an outlet 16 of a compressor part 18 of a turbo- charger unit 20, which is called here as the first turbocharger unit.
  • turbocharger unit is depicted by a one-stage system, but it is clear that the turbocharger unit i.e. the turbine part and/or the compressor part, may comprise several stages.
  • the exhaust gas system 10 comprises an exhaust manifold 26 from which an exhaust conduit 28 extends to an inlet 30 of a turbine part 32 of the turbocharger unit 20.
  • the turbine part 32 and the compressor part 18 of the turbocharger are coupled with each other in a manner known as such to operate the compressor part by means of the turbine part.
  • the turbine part is here provided with a waste-gate 32'.
  • the exhaust gas recirculation conduit system 12 connects the ex- haust gas conduit 10 system with the inlet gas conduit system 6 so that a portion of the exhaust gas flow of the engine may be recirculated back to the engine.
  • the exhaust gas recirculation conduit system 12 comprises an exhaust gas recirculation manifold 34 which is connected separately to each inlet channel 8 of the cylinders of the engine by means of a branch conduits 36 arranged to extend from the exhaust gas recirculation manifold to an individual inlet channel 8. This way according to the invention the recirculated exhaust gas and fresh combustion gas are mixed at the earliest in the inlet channel 8 so that the recycled exhaust gas stream is divided into sub-streams, each of which is introduced to separate inlet channels 8.
  • an inlet channel for a cylinder comprises a first connection to an inlet gas conduit system 6 of the engine and a second connection to an exhaust gas systeml O.
  • the inlet channel 8 is further provided with a third connection to the exhaust gas recirculation conduit system 12.
  • the branch conduits are according to an embodiment provided with controllable inlets.
  • the branch conduits are according to another embodiment provided with fixed geometry inlets.
  • the engine comprises a second turbo- charger unit 40 arranged to the exhaust gas recirculation conduit system 12 in order to pressurize recirculated portion of the exhaust gas by means of the energy of exhaust gas of the engine. This way the pressure of the recy- cled portion of the exhaust gas is at least at a level of the pressure of the oxygen containing combustion gas in the inlet channels 8.
  • combustion air is introduced to the engine through an inlet gas conduit and the air is supercharged by a first turbocharger unit by mak- ing use of energy of the exhaust gases of the engine arranged to flow in and exhaust gas system and a controllable amount of exhaust gas is recirculated to the inlet gas conduit system and back to the combustion process of the engine.
  • the recirculation of the exhaust gas is assisted by means of the second turbocharger unit.
  • the second turbocharger unit 40 comprises a turbine part 42 which is operated by a second partial stream of exhaust gas of the engine while the first partial stream is lead to the first turbocharger unit 20.
  • the exhaust gas of the engine is divided into two partial streams the first partial stream of which is led to a turbine part of the first turbocharger unit and the second partial stream is led to a turbine part of the second turbocharger unit
  • the exhaust gas conduit 28 is provided with a branch conduit 28' which connects the exhaust manifold 26 to the turbine part 42 of the second turbocharger unit, i.e. to the inlet thereof.
  • the second partial stream of ex- haust gas of the engine which has passed through the turbine part 42 is returned back to the downstream side of the turbine part 32 of the first turbocharger unit 20.
  • first control valve 48 arranged for controlling the flow rate of second partial stream of exhaust gas through the turbine part 42 of the second turbocharger unit 40.
  • the valve 48 is here arranged to the branch conduit 28'. Controlling is performed by adjusting a throttling effect of the first control valve 48. This allows precise control of the operation of the second turbocharger unit and also precise control of the recirculated exhaust gas.
  • the valve may be of any kind of valve apparent to a skilled person in the art, which may provide a throttling effect to the gas flow through the turbine part 42.
  • the compressor part 44 of the second turbocharger unit 40 is connected also to the exhaust manifold 26 of the engine to receive exhaust gas of the engine.
  • An outlet of the at least one compressor part 44 is connected to the inlet gas conduit system 6 by means of the exhaust gas recir- culation conduit system 12.
  • the inlet of the compressor part is in connection with the exhaust manifold 26 engine.
  • the exhaust gas recirculation conduit system 12 may comprise a gas cleaning device 50, such as hot gas particulate material filter.
  • the exhaust gas recirculation conduit system 12 comprises a first gas cooler unit 52 arranged in the figure 1 downstream the gas cleaning device but prior to the compressor part 44 in the gas flow direction. The directions of gas flow in the various conduits are shown by arrows in the figure.
  • the exhaust gas recirculation conduit system 12 comprises a control circuit 56 leading from upstream side of the compressor part 44 to downstream side of the compressor part 44 of the second turbocharger unit.
  • the control circuit 56 is connected to the upstream side of the first gas cooler unit 52.
  • the control circuit 56 forms a recirculation line for the compressor part 44.
  • the compressor part When the control circuit is open the compressor part may be rotated at desired speed with minimum energy. And, when the rotational speed is maintained, normal operational circum- stances may be reached quickly when desired or needed. This is particularly advantageous in transitional situations.
  • the engine is operated in transient situations so that power of the first turbocharger unit 20 is temporarily increased by temporarily throttling down the flow rate of the second partial stream to the turbine part of the second turbocharger unit 40. Thus maximum exhaust gas flow rate and pressure may be delivered to the turbine part of the first turbocharger.
  • power of the first turbocharger unit 20 is temporarily increased by temporarily closing the valve 38, so that no recirculation of the exhaust gas will take place.
  • the flow rate of the second partial stream to the turbine part of the second turbocharger unit 40 is throttled down by the valve 48.
  • the valve 46 may be opened to open the connection between the upstream side of the com- pressor part 44 and downstream side of the compressor part 44.
  • the first valve 48 is controlled to maintain the rotational speed of the second turbocharger at a preset level while the valve 38 is closed. This way the second turbocharger is readily available when needed.
  • the exhaust gas recirculation conduit system 12 comprises further a second gas cooler unit 54 between the compressor part 44 and the exhaust gas recirculation manifold 34.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Supercharger (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

L'invention concerne un moteur à combustion interne (1) comprenant : un système de conduit d'entrée de gaz (6), et un système de gaz d'échappement (10) ; une première unité de turbocompresseur (20) ; une seconde unité de turbocompresseur (40) comprenant une partie turbine (42) qui est reliée au système de gaz d'échappement (10) et dont l'entrée est couplée en parallèle avec la partie turbine (32) de la première unité de turbocompresseur (20), et une partie compresseur dont l'entrée est reliée au système de gaz d'échappement (10) et la sortie est reliée au système de conduit d'entrée de gaz (6) via un système de conduit de recirculation de gaz d'échappement (12). L'entrée de la partie turbine (42) de la seconde unité de turbocompresseur est reliée au système de gaz d'échappement par l'intermédiaire d'une première soupape de commande (48). L'invention concerne également un procédé de fonctionnement de moteur à combustion interne.
PCT/FI2012/050666 2011-07-01 2012-06-27 Moteur à combustion interne et son procédé de fonctionnement WO2013004898A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201280032407.1A CN103890367B (zh) 2011-07-01 2012-06-27 内燃发动机和操作内燃发动机的方法
JP2014517858A JP5908075B2 (ja) 2011-07-01 2012-06-27 内燃機関及び内燃機関の駆動方法
RU2014103452/06A RU2014103452A (ru) 2011-07-01 2012-06-27 Двигатель внутреннего сгорания и способ эксплуатации двигателя внутреннего сгорания
KR1020147002279A KR101566133B1 (ko) 2011-07-01 2012-06-27 내연 엔진 및 내연 엔진을 작동하는 방법
EP12759787.0A EP2726726B1 (fr) 2011-07-01 2012-06-27 Moteur à combustion interne et son procédé de fonctionnement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20115705A FI20115705A0 (fi) 2011-07-01 2011-07-01 Polttomoottori ja polttomoottorin syöttökaasukanavajärjestely
FI20115705 2011-07-01

Publications (1)

Publication Number Publication Date
WO2013004898A1 true WO2013004898A1 (fr) 2013-01-10

Family

ID=44318379

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2012/050666 WO2013004898A1 (fr) 2011-07-01 2012-06-27 Moteur à combustion interne et son procédé de fonctionnement

Country Status (7)

Country Link
EP (1) EP2726726B1 (fr)
JP (1) JP5908075B2 (fr)
KR (1) KR101566133B1 (fr)
CN (1) CN103890367B (fr)
FI (1) FI20115705A0 (fr)
RU (1) RU2014103452A (fr)
WO (1) WO2013004898A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3168450A1 (fr) * 2015-11-12 2017-05-17 Winterthur Gas & Diesel Ltd. Moteur à combustion interne, procédé de nettoyage des gaz d'échappement d'un moteur à combustion interne et procédé de rétrofittage d'un moteur à combustion interne

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108730042A (zh) * 2015-07-24 2018-11-02 丁永新 防止发动机熄火的割草机
FR3044046B1 (fr) * 2015-11-25 2019-09-13 Continental Automotive France Procede de controle d'un moteur thermique
CN105781810B (zh) * 2016-04-26 2018-04-24 哈尔滨工程大学 一种实现egr技术的增压柴油机以及增压柴油机egr实现方法

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EP0620365A1 (fr) * 1993-04-16 1994-10-19 Krupp MaK Maschinenbau GmbH Moteur à combustion interne avec recirculation de gaz d'échappement
EP0740065A1 (fr) * 1995-04-25 1996-10-30 Daf Trucks N.V. Moteur à combustion du type à pistons avec système de recirculation de gaz d'échappement et système pour l'utilisation dans un tel moteur
US20100122530A1 (en) 2008-10-17 2010-05-20 Pierre Bernard French Internal combustion engine with exhaust gas recirculation
EP2196659A1 (fr) * 2008-12-10 2010-06-16 ABB Turbo Systems AG Système de charge à deux niveaux pour la circulation de gaz d'échappement
EP2330287A1 (fr) * 2009-12-04 2011-06-08 Caterpillar Motoren GmbH & Co. KG Procédé et système de recirculation des gaz d'échappement

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US7254948B2 (en) * 2005-02-21 2007-08-14 Cummins Inc. Boost wastegate device for EGR assist
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Publication number Priority date Publication date Assignee Title
EP0620365A1 (fr) * 1993-04-16 1994-10-19 Krupp MaK Maschinenbau GmbH Moteur à combustion interne avec recirculation de gaz d'échappement
EP0740065A1 (fr) * 1995-04-25 1996-10-30 Daf Trucks N.V. Moteur à combustion du type à pistons avec système de recirculation de gaz d'échappement et système pour l'utilisation dans un tel moteur
US20100122530A1 (en) 2008-10-17 2010-05-20 Pierre Bernard French Internal combustion engine with exhaust gas recirculation
EP2196659A1 (fr) * 2008-12-10 2010-06-16 ABB Turbo Systems AG Système de charge à deux niveaux pour la circulation de gaz d'échappement
EP2330287A1 (fr) * 2009-12-04 2011-06-08 Caterpillar Motoren GmbH & Co. KG Procédé et système de recirculation des gaz d'échappement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3168450A1 (fr) * 2015-11-12 2017-05-17 Winterthur Gas & Diesel Ltd. Moteur à combustion interne, procédé de nettoyage des gaz d'échappement d'un moteur à combustion interne et procédé de rétrofittage d'un moteur à combustion interne

Also Published As

Publication number Publication date
EP2726726A1 (fr) 2014-05-07
CN103890367A (zh) 2014-06-25
KR20140051918A (ko) 2014-05-02
JP5908075B2 (ja) 2016-05-11
FI20115705A0 (fi) 2011-07-01
JP2014520996A (ja) 2014-08-25
CN103890367B (zh) 2016-03-30
KR101566133B1 (ko) 2015-11-04
EP2726726B1 (fr) 2015-12-30
RU2014103452A (ru) 2015-08-10

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