EP1238194A1 - Dispositif de recirculation de gaz d'echappement - Google Patents

Dispositif de recirculation de gaz d'echappement

Info

Publication number
EP1238194A1
EP1238194A1 EP00991170A EP00991170A EP1238194A1 EP 1238194 A1 EP1238194 A1 EP 1238194A1 EP 00991170 A EP00991170 A EP 00991170A EP 00991170 A EP00991170 A EP 00991170A EP 1238194 A1 EP1238194 A1 EP 1238194A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
valve
gas recirculation
line
exhaust
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP00991170A
Other languages
German (de)
English (en)
Other versions
EP1238194B1 (fr
Inventor
Werner Remmels
Peter Mattes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen GmbH
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 MTU Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP1238194A1 publication Critical patent/EP1238194A1/fr
Application granted granted Critical
Publication of EP1238194B1 publication Critical patent/EP1238194B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • F02M26/43—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which exhaust from only one cylinder or only a group of cylinders is directed to the intake of the engine
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having 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
    • 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
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system
    • 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
    • F02M26/39—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in series
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High 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
    • 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

Definitions

  • Exhaust gas recirculation is an effective measure to reduce nitrogen oxide emissions in internal combustion engines.
  • a device for exhaust gas recirculation is known, for example, from US 5,517,976. There are the cylinders of a supercharged one
  • An analog device is also shown in DE 39 30 243 A1, where a 3/2-way valve is used to switch off the exhaust gas recirculation when the internal combustion engine is cold and the load is low.
  • the exhaust gas recirculation is switched off, the exhaust gas from a cylinder connected to the exhaust gas return line reaches the exhaust gas line connected to the other cylinders.
  • a problem with such a device, which divides the cylinders into two groups, one of which is intended for exhaust gas recirculation, is the need to arrange a valve device in the area of the exhaust manifold, where the installation conditions are very cramped. If the exhaust manifold is cooled, the passage of the drive shaft through the water jacket can only be solved with great design effort.
  • Another device is known from US Pat. No. 4,249,382 that uses a group of exhaust gas cylinders for exhaust gas recirculation.
  • a valve device with two valves is used to control the exhaust gas flows.
  • a Check valve is used to prevent combustion air from entering the air supply line into the exhaust gas return line.
  • DE 19521573 A1 shows a supercharged internal combustion engine with exhaust gas recirculation, which contains a non-return flap in the exhaust gas return line and also a valve for switching off the exhaust gas recirculation.
  • the recirculated exhaust gas is taken from an exhaust manifold to which all cylinders of the internal combustion engine are connected.
  • the disadvantage of this embodiment is that the exhaust gas composition of the recirculated exhaust gas cannot be optimally adjusted, since a cylinder-specific regulation for influencing the exhaust gas quality of the recirculated exhaust gas is not possible.
  • the invention is based on the problem of specifying a valve device for the exhaust gas recirculation for internal combustion engines with two groups of cylinders, of which one group (“donor cylinder”) provides the exhaust gas for the exhaust gas recirculation, which requires little design effort in the area of the exhaust manifold.
  • FIG. 2a shows a section of the exhaust gas line, in which a valve device formed with two flaps is shown in position with exhaust gas recirculation;
  • Figure 2b shows a portion of the exhaust pipe corresponding to Figure 2a with the position
  • FIGS. 2a and 2b the exhaust pipe system is shown in the area of the valve device for exhaust gas recirculation consisting of valves 10 and 11, exhaust gas recirculation of the exhaust gas of cylinder 3 taking place in the position of the valves in FIG. 2a and in the position of the valves 2b, the exhaust gas recirculation is switched off, so that the exhaust gas from all cylinders 2, 3 reaches the turbine 6.
  • the valves 10 and 1 1 are designed as flaps.
  • the valve 11 arranged in the exhaust gas recirculation line 7 can be switched into an open position for exhaust gas recirculation (FIG. 2a) and a closed position (FIG. 2b) in which no exhaust gas recirculation takes place, depending on engine operating parameters. Due to the non-return function of the valve 10, only the exhaust gas from the cylinder 3 is returned.
  • the valve 10 arranged in the exhaust manifold 5 is held in exhaust gas recirculation due to the pressure conditions and the action of a return spring 12 in the closed position in the stop on an abutment 13, as shown in Figure 2a.
  • the restoring force of the spring is selected so that the desired opening and closing conditions are met in coordination with the existing pressure conditions.
  • a damping element that engages the flap prevents flutter movements caused by pressure surges.
  • the direction of the exhaust gas flows is shown by arrows 14, 15 and 16.
  • valve 11 If the valve 11 is brought into the closed position according to FIG. 2b to switch off the exhaust gas recirculation, the valve 10 opens automatically due to the pressure difference occurring in the areas of the exhaust manifold separated from the valve 10, and a passage is created through which the exhaust gas of the cylinder 3 flows into the section of the exhaust manifold connected to the turbine 6. All of the exhaust gas from all the cylinders reaches the turbine 6.
  • valve device shown from the valves 10 and 1 1 for exhaust gas recirculation allows a structurally simple design in the area of the exhaust manifold 7, because due to the arrangement of a controllable valve device in the exhaust gas recirculation line 7 in the exhaust manifold 5, only an automatic check valve is sufficient.
  • the check valve which is designed as a spring-loaded flap, can be produced even in tight installation conditions without complex design measures. In case of a cooled exhaust manifold in particular also eliminates the complex implementation of the necessary drive shaft through the water jacket.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Supercharger (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne un dispositif destiné à la recirculation de gaz d'échappement lors du fonctionnement de moteurs à combustion interne multicylindres. Les cylindres (2, 3) du moteur à combustion interne sont répartis en deux groupes, les gaz d'échappement d'un groupe, de préférence d'un cylindre (3), pouvant être recirculés vers la conduite d'admission (4) du moteur à combustion interne au moyen d'une conduite de recirculation de gaz d'échappement (7). La commande de la recirculation de gaz d'échappement est effectuée par une soupape commandable (11) dans la conduite de recirculation de gaz d'échappement (7). Une soupape anti-retour (10) conçue de préférence en tant que clapet anti-retour dans la conduite collectrice de gaz d'échappement (5) du moteur à combustion interne ouvre ou referme automatiquement un passage entre deux zones de la conduite collectrice de gaz d'échappement (5) en fonction de la position de commutation du dispositif de soupape (11) dans la conduite de recirculation de gaz d'échappement (7). Du point de vue du montage, l'intégration d'une soupape anti-retour (10) sans commande propre dans la conduite collectrice de gaz d'échappement (5) peut être réalisée aisément même dans des espaces limités.
EP00991170A 1999-12-17 2000-12-12 Dispositif de recirculation de gaz d'echappement Expired - Lifetime EP1238194B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19960998A DE19960998C1 (de) 1999-12-17 1999-12-17 Einrichtung zur Abgasrückführung
DE19960998 1999-12-17
PCT/EP2000/012573 WO2001044650A1 (fr) 1999-12-17 2000-12-12 Dispositif de recirculation de gaz d'echappement

Publications (2)

Publication Number Publication Date
EP1238194A1 true EP1238194A1 (fr) 2002-09-11
EP1238194B1 EP1238194B1 (fr) 2005-03-09

Family

ID=7933103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00991170A Expired - Lifetime EP1238194B1 (fr) 1999-12-17 2000-12-12 Dispositif de recirculation de gaz d'echappement

Country Status (6)

Country Link
US (1) US6752132B2 (fr)
EP (1) EP1238194B1 (fr)
JP (1) JP2003519311A (fr)
DE (1) DE19960998C1 (fr)
ES (1) ES2237493T3 (fr)
WO (1) WO2001044650A1 (fr)

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US7801664B2 (en) * 2007-07-12 2010-09-21 Ford Global Technologies, Llc Cylinder charge temperature control for an internal combustion engine
US7779823B2 (en) * 2007-07-12 2010-08-24 Ford Global Technologies, Llc Cylinder charge temperature control for an internal combustion engine
US8020525B2 (en) 2007-07-12 2011-09-20 Ford Global Technologies, Llc Cylinder charge temperature control for an internal combustion engine
US8316829B2 (en) * 2008-02-08 2012-11-27 Cummins Ip, Inc. Apparatus, system, and method for efficiently operating an internal combustion engine utilizing exhaust gas recirculation
US8291891B2 (en) 2008-06-17 2012-10-23 Southwest Research Institute EGR system with dedicated EGR cylinders
JP5382213B2 (ja) * 2010-05-21 2014-01-08 トヨタ自動車株式会社 内燃機関及び内燃機関の制御装置
US8944034B2 (en) 2011-02-11 2015-02-03 Southwest Research Institute Dedicated EGR control strategy for improved EGR distribution and engine performance
US8561599B2 (en) 2011-02-11 2013-10-22 Southwest Research Institute EGR distributor apparatus for dedicated EGR configuration
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US10125726B2 (en) 2015-02-25 2018-11-13 Southwest Research Institute Apparatus and methods for exhaust gas recirculation for an internal combustion engine utilizing at least two hydrocarbon fuels
CN104895705A (zh) * 2015-04-28 2015-09-09 潍柴动力股份有限公司 废气再循环系统、机动车及废气再循环系统的控制方法
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Also Published As

Publication number Publication date
EP1238194B1 (fr) 2005-03-09
JP2003519311A (ja) 2003-06-17
US6752132B2 (en) 2004-06-22
WO2001044650A1 (fr) 2001-06-21
ES2237493T3 (es) 2005-08-01
DE19960998C1 (de) 2001-02-15
US20020189598A1 (en) 2002-12-19

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