EP1238194B1 - Dispositif de recirculation de gaz d'echappement - Google Patents

Dispositif de recirculation de gaz d'echappement Download PDF

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Publication number
EP1238194B1
EP1238194B1 EP00991170A EP00991170A EP1238194B1 EP 1238194 B1 EP1238194 B1 EP 1238194B1 EP 00991170 A EP00991170 A EP 00991170A EP 00991170 A EP00991170 A EP 00991170A EP 1238194 B1 EP1238194 B1 EP 1238194B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
exhaust gas
valve
gas recirculation
line
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.)
Expired - Lifetime
Application number
EP00991170A
Other languages
German (de)
English (en)
Other versions
EP1238194A1 (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

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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

  • the invention relates to a device for exhaust gas recirculation during operation
  • Electric combustion engine according to the preamble of patent claim 1.
  • An effective measure to reduce nitrogen oxide emissions in internal combustion engines is the exhaust gas recirculation.
  • a device for exhaust gas recirculation goes out, for example of US 5,517,976 as known.
  • the cylinders are a charged one Internal combustion engine divided into two groups, the exhaust gas of a group, Preferably, a cylinder, via an exhaust gas recirculation line of the suction line of Internal combustion engine is supplied.
  • the exhaust gas of the other cylinder group is in a Collected exhaust manifold and fed to the turbine of an exhaust gas turbocharger.
  • the Exhaust gas recirculation and the exhaust manifold are via a connecting line and a valve device connected to each other, which has a flow cross-section of the Connection line controls.
  • An analog device is also shown in DE 39 30 243 A1, where a 3/2-way valve serves to shut off the exhaust gas recirculation in cold Internal combustion engine and low load.
  • a 3/2-way valve serves to shut off the exhaust gas recirculation in cold Internal combustion engine and low load.
  • Exhaust gas recirculation reaches the exhaust gas of a connected to the exhaust gas recirculation line Cylinder in the connected to the other cylinder exhaust manifold.
  • the problem with such a device the division of the cylinder in two Groups is, of which a group is provided for exhaust gas recirculation, is the need for an arrangement of a valve device in the field of Exhaust manifold, where the installation conditions are very cramped. If the Is exhaust manifold is cooled, is also the implementation of the drive shaft through to solve the water jacket only with great design effort.
  • a further device as known which is a group of exhaust cylinders for exhaust gas recirculation draws.
  • a valve device with two valves for controlling the exhaust gas flows.
  • a Check valve used to prevent the entry of combustion air out of the Prevent air supply line in the exhaust gas recirculation line.
  • DE 19521573 A1 is a supercharged internal combustion engine with exhaust gas recirculation represented in the exhaust gas recirculation line, a check valve and also a Contains valve for switching off exhaust gas recirculation.
  • the recirculated exhaust gas is a Taken off exhaust manifold, to which all cylinders of the internal combustion engine are connected. Disadvantage of this design is that the exhaust gas composition of recirculated exhaust gas can not be optimally adjusted because a cylinder-individual Control to influence the exhaust gas quality of the recirculated exhaust gas not possible is.
  • the invention is based on the problem for internal combustion engines with two groups of Cylinders, of which one group ("donor cylinder") the exhaust gas for exhaust gas recirculation provides an exhaust gas recirculation valve device, which is in the range of Exhaust manifold requires little design effort.
  • One preferably designed as a flap with a return spring check valve divides the Exhaust manifold in two sections.
  • the integration of a check valve without Control in the exhaust manifold prepares even in limited space no design problems.
  • the control of the recirculated exhaust gas streams is made by a controllable valve in the exhaust gas recirculation line.
  • the order a controllable valve including drive shaft and servomotor in the exhaust gas recirculation line there prepares because of the space available there any Problems. In this way, one in terms of design effort and costs achieved favorable solution.
  • FIG. 1 shows a system diagram of an internal combustion engine 1 with the line system for Combustion air and exhaust gas.
  • the combustion air is the cylinders 2.3 of the Internal combustion engine 1 is supplied via a suction line 4, which is the compressor of a Exhaust gas turbocharger contains.
  • the exhaust gas of the cylinder 2,3 is in an exhaust manifold 5 received, which includes the turbine 6 of the exhaust gas turbocharger.
  • the Exhaust manifold 5 further has a connection to an exhaust gas recirculation line 7, which is connected to the intake pipe 4.
  • the exhaust gas recirculation is through valves 10 and 11 controlled in the exhaust manifold 5 and in the exhaust gas recirculation line 7 are arranged. Designed as a check valve valve 10, which in the Exhaust manifold 5 between the terminals of the cylinder groups 2 and 3, separates two areas of the exhaust manifold 5.
  • valves 10 and 11 are designed as flaps.
  • the in the exhaust gas recirculation line 7th arranged valve 11 is in response to engine operating parameters in an open Position for exhaust gas recirculation (FIG. 2a) and a closed position (FIG. 2b) switchable, in which no exhaust gas recirculation takes place. Due to the kickback function of Valve 10 comes only the exhaust gas of the cylinder 3 for feedback.
  • the arranged in the exhaust manifold 5 valve 10 is exhaust gas recirculation due to the adjusting pressure conditions and the effect of a Return spring 12 held in the closed position in abutment against an abutment 13, as shown in Figure 2a.
  • the restoring force of the spring is chosen so that in Coordinate with the existing pressure conditions the desired opening and Closing conditions are met.
  • a damping element that acts on the flap, prevents flutter motions caused by pressure surges.
  • the direction of the Exhaust gas streams are shown by arrows 14,15 and 16.
  • valve 11 When the exhaust gas recirculation shutdown, the valve 11 in the closed position is brought in accordance with Figure 2b, the valve 10 opens due to the in the vom Valve 10 separated areas of the exhaust manifold adjusting pressure difference automatically and it creates a passage through which the exhaust gas of the cylinder 3 in the with the turbine 6 connected portion of the exhaust manifold overflows. The entire Exhaust gas from all cylinders reaches the turbine 6.
  • the valve 11 in the Exhaust gas recirculation line 7 to open only a part, so that only a part of the exhaust gas of the Cylinder 3 (donor cylinder) is returned to the suction line while the other Part passes together with the exhaust gas of the remaining cylinder 2 to the exhaust gas turbine.
  • the Exhaust gas pressure in the exhaust gas recirculation line is dependent inter alia on the opening of the Valve 11. The larger the opening of the valve 11, the lower is the due to the Backpressure caused exhaust pressure in the exhaust gas recirculation line, the larger is the be recycled exhaust gas.
  • the position of the valve 10 depends on the position of the valve 11.
  • valve device shown from the valves 10 and 11 for exhaust gas recirculation allowed in the exhaust manifold 7 a structurally simple design, 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. That as spring-loaded flap trained check valve is also in tight Installation conditions can be displayed without complex design measures. In case of a cooled exhaust manifold especially eliminates the costly implementation the necessary drive shaft through the water jacket.
  • an automatic flap in the exhaust manifold has in the further the advantage that it can serve as a safety device in the event that the exhaust gas the donor cylinder, z. B. in case of a defect of the valve 11, in case of disturbances in the Control, in case of contamination or blockage of the exhaust gas cooler or other Nevertheless, components in the return line can escape.

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)
  • Supercharger (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Exhaust Silencers (AREA)

Claims (3)

  1. Dispositif de recirculation de gaz d'échappement dans un moteur à combustion interne à plusieurs cylindres, avec une tubulure d'admission (4) pour alimenter les cylindres en air comburant et avec un collecteur d'échappement (5) pour évacuer les gaz d'échappement des cylindres du moteur à combustion interne, une soupape (10) étant prévue dans le collecteur d'échappement (5) entre deux zones du collecteur d'échappement (5) associées à deux groupes de cylindres (2, 3), et une zone du collecteur d'échappement (5) étant adaptée pour être raccordée à un conduit de recirculation des gaz d'échappement (7) qui débouche dans la tubulure d'admission (4), caractérisé en ce que la soupape (10) disposée dans le collecteur d'échappement (5) est une soupape antiretour à fermeture automatique autorisant, en fonction de la différence de pression appliquée, l'écoulement des gaz d'échappement depuis la zone du collecteur d'échappement (5) communiquant avec le conduit de recirculation des gaz d'échappement (7) vers l'autre zone du collecteur d'échappement (5) délimitée par la soupape (10) tout en empêchant par sa fermeture l'écoulement en sens inverse et qu'il est par ailleurs prévu dans le conduit de recirculation des gaz d'échappement (7) une soupape commandable (11) commandant une section de passage du conduit de recirculation des gaz d'échappement (7).
  2. Dispositif selon la revendication 1, caractérisé en ce que la soupape antiretour est conformée en forme de clapet qui est sollicité dans la direction de fermeture par un ressort de rappel (12) jusqu'à ce qu'il vienne heurter une butée (13).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la soupape commandable (11) commande la section de passage dans le conduit de recirculation des gaz d'échappement (7) en fonction des paramètres de fonctionnement du moteur.
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 EP1238194A1 (fr) 2002-09-11
EP1238194B1 true 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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CN106460734B (zh) * 2014-05-30 2018-12-28 日产自动车株式会社 内燃机以及内燃机的控制方法
US10233809B2 (en) 2014-09-16 2019-03-19 Southwest Research Institute Apparatus and methods for exhaust gas recirculation for an internal combustion engine powered by a hydrocarbon fuel
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
US9797349B2 (en) 2015-05-21 2017-10-24 Southwest Research Institute Combined steam reformation reactions and water gas shift reactions for on-board hydrogen production in an internal combustion engine
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Also Published As

Publication number Publication date
EP1238194A1 (fr) 2002-09-11
DE19960998C1 (de) 2001-02-15
US6752132B2 (en) 2004-06-22
US20020189598A1 (en) 2002-12-19
ES2237493T3 (es) 2005-08-01
WO2001044650A1 (fr) 2001-06-21
JP2003519311A (ja) 2003-06-17

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