EP0857870A2 - Internal combustion diesel engine with exhaust gases re-circulation, provided with a device for mixing the re-circulation gases - Google Patents

Internal combustion diesel engine with exhaust gases re-circulation, provided with a device for mixing the re-circulation gases Download PDF

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Publication number
EP0857870A2
EP0857870A2 EP98830044A EP98830044A EP0857870A2 EP 0857870 A2 EP0857870 A2 EP 0857870A2 EP 98830044 A EP98830044 A EP 98830044A EP 98830044 A EP98830044 A EP 98830044A EP 0857870 A2 EP0857870 A2 EP 0857870A2
Authority
EP
European Patent Office
Prior art keywords
circulation
conduit
intake manifold
exhaust gases
gases
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.)
Withdrawn
Application number
EP98830044A
Other languages
German (de)
French (fr)
Other versions
EP0857870A3 (en
Inventor
Silvio C.R.F. Soc. Consortile per Azioni Canale
Germano C.R.F. Soc. Consortile per Azioni Bonetto
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.)
Centro Ricerche Fiat SCpA
Original Assignee
Centro Ricerche Fiat SCpA
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 Centro Ricerche Fiat SCpA filed Critical Centro Ricerche Fiat SCpA
Publication of EP0857870A2 publication Critical patent/EP0857870A2/en
Publication of EP0857870A3 publication Critical patent/EP0857870A3/en
Withdrawn legal-status Critical Current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
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system

Definitions

  • the present invention relates to internal combustion Diesel engines, of the known type comprising:
  • the engines of the above indicated type are able to decrease the nitrogen oxide emissions efficiently, due to the re-circulation of a portion of the exhaust gases into the intake manifold.
  • the oxygen fraction is reduced, as well as the maximum temperatures reached during combustion, which are both factors important for the formation of nitrogen oxides.
  • the reduction of the oxygen fraction in the intake add mixture generally causes an increase of the smoke emitted by the engine. For this reason, it is necessary to carefully control the level of the exhaust gases re-circulation. In particular, it is necessary to meter the total re-circulation level correctly as well as to assure a uniform distribution of the re-circulation gases cylinder by cylinder.
  • numeral 1 generally designates a Diesel engine comprising a plurality of cylinders, A, B, C, D, E in-line, which receive the intake air from respective brackets 3 of an intake manifold 4, having an inlet conduit 5.
  • Reference numeral 6 generally designates the exhaust manifold, comprising a plurality of brackets 7 which receive the exhaust gases coming out of the engine cylinders and from which there extends a conduit 8 for exhaust gas re-circulation having one end connected to the exhaust manifold 6 (through a valve of a known type, not shown, which is electronically controlled to assure the proper quantity of exhaust gas re-circulation) and the other end opening into the inlet conduit 5 of the intake manifold 4.
  • a valve of a known type, not shown which is electronically controlled to assure the proper quantity of exhaust gas re-circulation
  • the gases tend to remain separate, above all in conditions of high speed, from the intake air, while staying adjacent to the portion of the wall of conduit 5 which is located on the side opposite with respect to the area where conduit 8 opens.
  • the gases tend to remain adjacent to this wall until they reach the opposite end of the intake manifold, without mixing with the air.
  • the re-circulation exhaust gases tend to fill more the cylinders of the engine which are more far away with respect to the area where the re-circulation conduit 8 opens, while filling less those cylinders which are closer to this area.
  • This solution is shown in the diagram of figure 5 which shows the re-circulation percentage for each cylinder and for each average value of re-circulation of the exhaust gases into the engine.
  • the various lines in the diagram relate to the various cylinders and show how the re-circulation of the exhaust gases is lower in the cylinders which are closer to the merging point of the re-circulation conduit 8.
  • the object of the present invention is that of overcoming the above-mentioned drawback.
  • the invention provides an internal combustion Diesel engine of the type indicated at the beginning, characterized in that the end of the re-circulation conduit for the exhaust gases which is connected to the intake manifold opens on an annular chamber surrounding a portion of the inlet conduit of the intake manifold which is communicated thereto through a plurality of apertures.
  • the above-mentioned apertures are uniformly distributed along the circumferencial wall of said portion of the inlet conduit of the intake manifold.
  • the exhaust gases which merge into the intake manifold are compelled to mix with the air at the inlet of the intake manifold before proceeding further towards the cylinders, so that the uniformity of gas re-circulation into the various cylinders of the engine is assured.
  • the above-mentioned portion of the inlet conduit of the intake manifold which is surrounded by the annular chamber on which the re-circulation conduit opens is provided in form of a Venturi conduit.
  • the main features of the engine according to the present invention lies in that the conduit 8 for re-circulation of the exhaust gases does not open directly on the inlet conduit 5 of the intake manifold 4, as in the case of the engine according to the prior art shown in figure 1.
  • the conduit 8 opens on an annular chamber 9 surrounding a portion 10 of conduit 5.
  • the annular chamber 9 communicates with the inner passage of conduit 10 through a plurality of apertures 11 (see also figure 3) uniformly distributed in the circumferencial direction. In this manner, the exhaust gases coming from conduit 8 are compelled to be mixed with the intake air at the inlet of manifold 4 before proceeding further towards the cylinders of the engine, so that a uniform distribution of the exhaust gases among the various cylinders is assured.
  • the preferred embodiment of the invention provides a conduit 10 in form of a Venturi conduit.
  • a conduit 10 in form of a Venturi conduit.
  • the minimum cross-section of the Venturi conduit is not to jeopardize the volumetric efficiency of the engine and not to reduce the maximum performance.
  • Figure 3 shows the case in which the Venturi conduit 10 is made by an insert mounted within the section 12 of the intake manifold, in which there is formed a transverse hole 13 for inserting the re-circulation conduit 8.
  • the Venturi conduit 10 could be made in one piece with the intake manifold.
  • the apertures 11 are in number of four, each extending throughout an angle of a little less than 90° along the circumferencial direction of the throttling section of the Venturi conduit 10.
  • any other shape of conduit 10 and apertures 11 is possible.
  • figure 4 shows the case of a conduit 10 which is not in form of Venturi and has a plurality of circular apertures 11 which are angularly distributed along circumferencial direction.
  • Figure 6 is a diagram corresponding to that of figure 5 which has been already described above, which is made by testing the engine according to the invention. As shown, the lines corresponding to the re-circulation of the exhaust gases in the various cylinders of the engine are substantially coincident.
  • the engine according to the invention solves therefore simply and efficiently the problem of uniform distribution of the re-circulation of the exhaust gases in the various cylinders of a Diesel engine, while obtaining, in the case of the preferred embodiment which makes use of a Venturi conduit, an increase of the re-circulation capability, due to the vacuum which is generated at the Venturi throttling section, without adding further devices, and while reducing the noise coming from the intake.

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

Abstract

In an internal combustion Diesel engine, a conduit (8) for re-circulation of the exhaust gases into the intake manifold (4) opens on an annular chamber (9) surrounding a portion (10) of the inlet conduit (5) of the intake manifold (4) which is communicated to the latter through a plurality of apertures (11). Preferably this conduit portion (10) of the intake manifold is in form of a Venturi conduit.

Description

The present invention relates to internal combustion Diesel engines, of the known type comprising:
  • a plurality of in-line cylinders,
  • an intake manifold, having an intake conduit for the air fed to the engine and a plurality of outlet brackets respectively connected to the engine cylinders,
  • an exhaust manifold, for receiving the exhaust gases coming out of the engine cylinders, and
  • a re-circulation conduit for the exhaust gases, connecting the exhaust manifold to the inlet conduit of the intake manifold.
The engines of the above indicated type are able to decrease the nitrogen oxide emissions efficiently, due to the re-circulation of a portion of the exhaust gases into the intake manifold. By mixing the exhaust gases and the intake air the oxygen fraction is reduced, as well as the maximum temperatures reached during combustion, which are both factors important for the formation of nitrogen oxides. The reduction of the oxygen fraction in the intake add mixture generally causes an increase of the smoke emitted by the engine. For this reason, it is necessary to carefully control the level of the exhaust gases re-circulation. In particular, it is necessary to meter the total re-circulation level correctly as well as to assure a uniform distribution of the re-circulation gases cylinder by cylinder. The electronic control systems of Diesel engines which are presently known are able to fulfil well the former function, i.e. the control of the general level of exhaust gases re-circulation. The proper distribution of the re-circulation gases cylinder by cylinder is instead a problem involving fluid dynamic aspects. The two gases (air and exhaust gases) have very different temperatures and densities and are mixed with each other with difficulty. With reference to figure 1 of the annexed drawings, which diagrammatically shows a Diesel engine with exhaust gas re-circulation of a known type, numeral 1 generally designates a Diesel engine comprising a plurality of cylinders, A, B, C, D, E in-line, which receive the intake air from respective brackets 3 of an intake manifold 4, having an inlet conduit 5. Reference numeral 6 generally designates the exhaust manifold, comprising a plurality of brackets 7 which receive the exhaust gases coming out of the engine cylinders and from which there extends a conduit 8 for exhaust gas re-circulation having one end connected to the exhaust manifold 6 (through a valve of a known type, not shown, which is electronically controlled to assure the proper quantity of exhaust gas re-circulation) and the other end opening into the inlet conduit 5 of the intake manifold 4. As it is clearly apparent, in the conventional solutions, the flow of re-circulated gas is introduced into the inlet portion of the intake manifold 4 directly. Therefore, the gases tend to remain separate, above all in conditions of high speed, from the intake air, while staying adjacent to the portion of the wall of conduit 5 which is located on the side opposite with respect to the area where conduit 8 opens. The gases tend to remain adjacent to this wall until they reach the opposite end of the intake manifold, without mixing with the air. As a result of this, the re-circulation exhaust gases tend to fill more the cylinders of the engine which are more far away with respect to the area where the re-circulation conduit 8 opens, while filling less those cylinders which are closer to this area. This solution is shown in the diagram of figure 5 which shows the re-circulation percentage for each cylinder and for each average value of re-circulation of the exhaust gases into the engine. The various lines in the diagram relate to the various cylinders and show how the re-circulation of the exhaust gases is lower in the cylinders which are closer to the merging point of the re-circulation conduit 8.
The object of the present invention is that of overcoming the above-mentioned drawback.
In view of achieving this object, the invention provides an internal combustion Diesel engine of the type indicated at the beginning, characterized in that the end of the re-circulation conduit for the exhaust gases which is connected to the intake manifold opens on an annular chamber surrounding a portion of the inlet conduit of the intake manifold which is communicated thereto through a plurality of apertures.
Preferably, the above-mentioned apertures are uniformly distributed along the circumferencial wall of said portion of the inlet conduit of the intake manifold.
Due to the above-mentioned features, the exhaust gases which merge into the intake manifold are compelled to mix with the air at the inlet of the intake manifold before proceeding further towards the cylinders, so that the uniformity of gas re-circulation into the various cylinders of the engine is assured.
In a preferred embodiment, in order to minimize the load losses in the intake manifold and to facilitate the flow of re-circulation gases, the above-mentioned portion of the inlet conduit of the intake manifold which is surrounded by the annular chamber on which the re-circulation conduit opens is provided in form of a Venturi conduit.
Thus, beyond the improvement in the distribution of the re-circulation gases among the cylinders, also an increase of the re-circulation capability is achieved. Indeed, the vacuum which is generated at the throttling section of the Venturi conduit increases the amount of re-circulation of the exhaust gases without adding further devices (such as throttling valves in the intake manifold) as it is sometimes done according to the prior art. A further advantage of the above-mentioned solution lies in the reduction of the noise coming from the intake, which is a per se known feature deriving from the use of a Venturi nozzle located at the inlet of the manifold.
Further features and advantages of the invention will become apparent from the description which follows with reference to the annexed drawings, given purely by way of non limiting example, in which:
  • figure 1 is a diagrammatic view of a Diesel engine according to the prior art,
  • figure 2 is a diagrammatic view of an embodiment of the engine according to the invention,
  • figure 3 is a cross-sectional view at an enlarged scale of the mixing device forming part of the engine according to the invention, according to a preferred embodiment,
  • figure 4 shows a variant of the mixing device,
  • figure 5 is a diagram which shows the distribution of the re-circulation gases among the various cylinders of an engine according to the prior art, and
  • figure 6 is a diagram similar to that of figure 5 which shows the same situation in the case of the engine according to the invention.
    • In figure 2, parts corresponding to those of figure 1 described above have been designated by the same reference numeral. As clearly apparent from a comparison of these figures, the main features of the engine according to the present invention lies in that the conduit 8 for re-circulation of the exhaust gases does not open directly on the inlet conduit 5 of the intake manifold 4, as in the case of the engine according to the prior art shown in figure 1. In the case of the engine according to the invention shown in figure 2, the conduit 8 opens on an annular chamber 9 surrounding a portion 10 of conduit 5. The annular chamber 9 communicates with the inner passage of conduit 10 through a plurality of apertures 11 (see also figure 3) uniformly distributed in the circumferencial direction. In this manner, the exhaust gases coming from conduit 8 are compelled to be mixed with the intake air at the inlet of manifold 4 before proceeding further towards the cylinders of the engine, so that a uniform distribution of the exhaust gases among the various cylinders is assured.
    As shown in figure 2 and figure 3, the preferred embodiment of the invention provides a conduit 10 in form of a Venturi conduit. In this manner, as indicated already above, the load losses in the intake manifold are minimized and the flow of the re-circulation gases is facilitated. The minimum cross-section of the Venturi conduit is not to jeopardize the volumetric efficiency of the engine and not to reduce the maximum performance.
    Figure 3 shows the case in which the Venturi conduit 10 is made by an insert mounted within the section 12 of the intake manifold, in which there is formed a transverse hole 13 for inserting the re-circulation conduit 8. However, it is clearly apparent that the Venturi conduit 10 could be made in one piece with the intake manifold. Also, in the example illustrated in figure 3, the apertures 11 are in number of four, each extending throughout an angle of a little less than 90° along the circumferencial direction of the throttling section of the Venturi conduit 10. However, it is clearly apparent that any other shape of conduit 10 and apertures 11 is possible.
    By way of example, figure 4 shows the case of a conduit 10 which is not in form of Venturi and has a plurality of circular apertures 11 which are angularly distributed along circumferencial direction.
    Figure 6 is a diagram corresponding to that of figure 5 which has been already described above, which is made by testing the engine according to the invention. As shown, the lines corresponding to the re-circulation of the exhaust gases in the various cylinders of the engine are substantially coincident.
    As clearly apparent from the foregoing description, the engine according to the invention solves therefore simply and efficiently the problem of uniform distribution of the re-circulation of the exhaust gases in the various cylinders of a Diesel engine, while obtaining, in the case of the preferred embodiment which makes use of a Venturi conduit, an increase of the re-circulation capability, due to the vacuum which is generated at the Venturi throttling section, without adding further devices, and while reducing the noise coming from the intake.
    Naturally, while the principle of the invention remains the same, the details of construction and the embodiments may widely vary with respect to what has been described and illustrated purely by way of example, without departing from the scope of the present invention.

    Claims (3)

    1. Internal combustion Diesel engine comprising:
      a plurality of in-line cylinders (A-E),
      an intake manifold (4), having an inlet conduit (5) for the engine intake air and a plurality of outlet brackets (3) respectively connected to the cylinders of the engine (A-E),
      an exhaust manifold (6), for receiving the exhaust gases coming out of the cylinders of the engine, and
      a conduit (8) for re-circulation of the exhaust gases, which connects the exhaust manifold (6) to the inlet conduit (5) of the intake manifold (4),
         characterized in that the end of the conduit (8) for re-circulation of the exhaust gases which is connected to the intake manifold (4) opens on an annular chamber (9) surrounding a portion (10) of the inlet conduit (5) of the intake manifold (4) and which is communicated to the latter through a plurality of apertures (11).
    2. Internal combustion engine according to claim 1, characterized in that the above-mentioned apertures (11) are uniformly distributed along the circumferencial wall of said portion (10) of the inlet conduit (5) of the intake manifold (4).
    3. Internal combustion engine according to claim 1, characterized in that the above-mentioned conduit portion (10) is in form of a Venturi conduit.
    EP98830044A 1997-02-11 1998-01-30 Internal combustion diesel engine with exhaust gases re-circulation, provided with a device for mixing the re-circulation gases Withdrawn EP0857870A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    ITTO970100 1997-02-11
    IT97TO000100A IT1291509B1 (en) 1997-02-11 1997-02-11 DIESEL CYCLE COMBUSTION ENGINE, WITH EXHAUST GAS RECIRCULATION, EQUIPPED WITH A RECIRCULATING GAS MIXER.

    Publications (2)

    Publication Number Publication Date
    EP0857870A2 true EP0857870A2 (en) 1998-08-12
    EP0857870A3 EP0857870A3 (en) 1999-05-12

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    EP98830044A Withdrawn EP0857870A3 (en) 1997-02-11 1998-01-30 Internal combustion diesel engine with exhaust gases re-circulation, provided with a device for mixing the re-circulation gases

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    EP (1) EP0857870A3 (en)
    IT (1) IT1291509B1 (en)

    Cited By (18)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1004767A2 (en) * 1998-11-27 2000-05-31 Nissan Motor Co., Ltd. Exhaust recirculation system of internal combustion engine
    EP1020632A1 (en) * 1999-01-15 2000-07-19 Renault V.I. Intake manifold with connecting means to an exhaust recirculation circuit
    GB2356223A (en) * 1999-11-09 2001-05-16 Caterpillar Inc Induction venturi for an exhaust gas recirculation (EGR) system in an i.c. engine
    WO2001079680A1 (en) * 2000-04-17 2001-10-25 Robert Bosch Gmbh Device for mixing and dosing gas flows in internal combustion engines
    EP1116874A3 (en) * 2000-01-12 2002-05-29 Henricus Geradus Method for feeding a combustion engine with a fuel-air mixture and device for performing the method
    US6439212B1 (en) 2001-12-19 2002-08-27 Caterpillar Inc. Bypass venturi assembly and elbow with turning vane for an exhaust gas recirculation system
    EP1264981A1 (en) * 2001-06-05 2002-12-11 Holset Engineering Company Limited Mixing fluid streams
    DE10118490C2 (en) * 2000-04-17 2003-03-27 Mitsubishi Motors Corp Arrangement of the intake system for an internal combustion engine with EGR device
    US6640542B2 (en) 2001-12-20 2003-11-04 Caterpillar Inc Bypass venturi assembly with single shaft actuator for an exhaust gas recirculation system
    US6659092B2 (en) 2001-12-20 2003-12-09 Caterpillar Inc Bypass assembly with annular bypass venturi for an exhaust gas recirculation system
    FR2901579A1 (en) * 2006-05-24 2007-11-30 Peugeot Citroen Automobiles Sa Recirculated exhaust gas introducing device for heat engine, has ring including internal opening i.e. slot, of less diameter, such that speed of air circulating at level of collar is high and dynamic pressure of gas in intake pipe is high
    DE102007035556A1 (en) 2007-07-28 2009-01-29 Daimler Ag Mixing apparatus for adding exhaust gas recirculation flow into charge air flow of internal-combustion engine, has connecting tube running transverse through passage channel and connecting inlet opening with one of chambers
    EP2236804A1 (en) * 2009-03-31 2010-10-06 Iveco S.p.A. Gas mixing device particularly for internal-combustion engines equipped with exhaust gas recirculation system
    US7845340B2 (en) 2006-12-22 2010-12-07 Cummins Inc. Air-exhaust mixing apparatus
    US20120180478A1 (en) * 2011-01-18 2012-07-19 GM Global Technology Operations LLC Exhaust gas recirculation system for an internal combustion engine
    ITRM20130103A1 (en) * 2013-02-22 2014-08-23 Piaggio & C Spa AIR INTAKE AND RECIRCULATION SYSTEM FOR EXHAUST GASES FOR A DIESEL ENGINE
    US20170314516A1 (en) * 2016-04-28 2017-11-02 Hyundai Motor Company Engine system for exhausting condensate water
    US10415516B2 (en) * 2016-04-28 2019-09-17 Hyundai Motor Company Engine system

    Family Cites Families (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE4420247B4 (en) * 1994-06-10 2004-03-04 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Exhaust gas recirculation device for internal combustion engines, in particular with plastic suction pipes
    DE69612420T2 (en) * 1995-03-14 2001-07-26 Cummins Engine Co Inc Turbo-charged diesel engine

    Non-Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Title
    None

    Cited By (28)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US6272851B1 (en) 1998-11-27 2001-08-14 Nissan Motor Co., Ltd. Exhaust recirculation system of internal combustion engine
    EP1004767A3 (en) * 1998-11-27 2000-11-22 Nissan Motor Co., Ltd. Exhaust recirculation system of internal combustion engine
    EP1004767A2 (en) * 1998-11-27 2000-05-31 Nissan Motor Co., Ltd. Exhaust recirculation system of internal combustion engine
    EP1020632A1 (en) * 1999-01-15 2000-07-19 Renault V.I. Intake manifold with connecting means to an exhaust recirculation circuit
    FR2788565A1 (en) * 1999-01-15 2000-07-21 Renault Vehicules Ind INTAKE MANIFOLD INCLUDING MEANS OF CONNECTION TO AN EXHAUST GAS RECYCLING CIRCUIT
    GB2356223A (en) * 1999-11-09 2001-05-16 Caterpillar Inc Induction venturi for an exhaust gas recirculation (EGR) system in an i.c. engine
    US6267106B1 (en) 1999-11-09 2001-07-31 Caterpillar Inc. Induction venturi for an exhaust gas recirculation system in an internal combustion engine
    GB2356223B (en) * 1999-11-09 2003-11-12 Caterpillar Inc Induction venturi for an exhaust gas recirculation system in an internal combustion engine
    EP1116874A3 (en) * 2000-01-12 2002-05-29 Henricus Geradus Method for feeding a combustion engine with a fuel-air mixture and device for performing the method
    WO2001079680A1 (en) * 2000-04-17 2001-10-25 Robert Bosch Gmbh Device for mixing and dosing gas flows in internal combustion engines
    DE10118490C2 (en) * 2000-04-17 2003-03-27 Mitsubishi Motors Corp Arrangement of the intake system for an internal combustion engine with EGR device
    EP1264981A1 (en) * 2001-06-05 2002-12-11 Holset Engineering Company Limited Mixing fluid streams
    US6439212B1 (en) 2001-12-19 2002-08-27 Caterpillar Inc. Bypass venturi assembly and elbow with turning vane for an exhaust gas recirculation system
    US6659092B2 (en) 2001-12-20 2003-12-09 Caterpillar Inc Bypass assembly with annular bypass venturi for an exhaust gas recirculation system
    US6640542B2 (en) 2001-12-20 2003-11-04 Caterpillar Inc Bypass venturi assembly with single shaft actuator for an exhaust gas recirculation system
    FR2901579A1 (en) * 2006-05-24 2007-11-30 Peugeot Citroen Automobiles Sa Recirculated exhaust gas introducing device for heat engine, has ring including internal opening i.e. slot, of less diameter, such that speed of air circulating at level of collar is high and dynamic pressure of gas in intake pipe is high
    US7845340B2 (en) 2006-12-22 2010-12-07 Cummins Inc. Air-exhaust mixing apparatus
    DE102007035556A1 (en) 2007-07-28 2009-01-29 Daimler Ag Mixing apparatus for adding exhaust gas recirculation flow into charge air flow of internal-combustion engine, has connecting tube running transverse through passage channel and connecting inlet opening with one of chambers
    EP2236804A1 (en) * 2009-03-31 2010-10-06 Iveco S.p.A. Gas mixing device particularly for internal-combustion engines equipped with exhaust gas recirculation system
    CN102606347A (en) * 2011-01-18 2012-07-25 通用汽车环球科技运作有限责任公司 Exhaust gas recirculation system for an internal combustion engine
    US20120180478A1 (en) * 2011-01-18 2012-07-19 GM Global Technology Operations LLC Exhaust gas recirculation system for an internal combustion engine
    US8689553B2 (en) * 2011-01-18 2014-04-08 GM Global Technology Operations LLC Exhaust gas recirculation system for an internal combustion engine
    ITRM20130103A1 (en) * 2013-02-22 2014-08-23 Piaggio & C Spa AIR INTAKE AND RECIRCULATION SYSTEM FOR EXHAUST GASES FOR A DIESEL ENGINE
    WO2014128026A1 (en) * 2013-02-22 2014-08-28 Piaggio & C. S.P.A. An air suction and exhaust gases recirculation system for a diesel engine
    CN105074190A (en) * 2013-02-22 2015-11-18 比亚乔公司 An air suction and exhaust gases recirculation system for a diesel engine
    CN105074190B (en) * 2013-02-22 2017-10-24 比亚乔公司 Air suction and gas recirculation system for diesel engine
    US20170314516A1 (en) * 2016-04-28 2017-11-02 Hyundai Motor Company Engine system for exhausting condensate water
    US10415516B2 (en) * 2016-04-28 2019-09-17 Hyundai Motor Company Engine system

    Also Published As

    Publication number Publication date
    IT1291509B1 (en) 1999-01-11
    EP0857870A3 (en) 1999-05-12
    ITTO970100A1 (en) 1998-08-11

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