WO2009071158A1 - Moteur à combustion interne à plusieurs chambres de combustion - Google Patents

Moteur à combustion interne à plusieurs chambres de combustion Download PDF

Info

Publication number
WO2009071158A1
WO2009071158A1 PCT/EP2008/009109 EP2008009109W WO2009071158A1 WO 2009071158 A1 WO2009071158 A1 WO 2009071158A1 EP 2008009109 W EP2008009109 W EP 2008009109W WO 2009071158 A1 WO2009071158 A1 WO 2009071158A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder head
shell element
exhaust gas
exhaust
combustion engine
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.)
Ceased
Application number
PCT/EP2008/009109
Other languages
German (de)
English (en)
Inventor
Holger Falkenried
Georg Georgs
Jochen HÄFNER
Adolf Kremer
Dieter Nowak
Erhard Rau
Gerd Tiefenbacher
Michael Wagenplast
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.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
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 Daimler AG filed Critical Daimler AG
Publication of WO2009071158A1 publication Critical patent/WO2009071158A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F01N13/105—Other arrangements or adaptations of exhaust conduits of exhaust manifolds having the form of a chamber directly connected to the cylinder head, e.g. without having tubes connected between cylinder head and chamber
    • 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

Definitions

  • the invention relates to an internal combustion engine having a plurality of combustion chambers in the form of cylinders, in which an air / fuel mixture can be reacted in a combustion reaction and which are bounded by a common cylinder head, wherein each combustion chamber is associated with an outlet channel formed in the cylinder head and a plurality of outlet channels in the area an exhaust manifold open into a common confluence area.
  • DE 101 41 534 A1 discloses a cylinder head for a multi-cylinder internal combustion engine, in which a plurality of outlet channels extend from outlet openings of the combustion chambers.
  • the exhaust ports merge in a confluence region that is substantially completely integrated into the cylinder head in such a way that it is integral with the cylinder head and is delimited by cooling water passages in the region of an upper side and in the region of an underside.
  • a mounting surface for a catalyst is provided, which is thus installed screwed directly to the cylinder head.
  • the object of the invention is in contrast to provide an exhaust manifold with particularly simple means whose heat transfer behavior is favorable.
  • the internal combustion engine has a plurality of combustion chambers in the form of cylinders in which an air / fuel mixture can be exothermically converted and which are delimited by a common cylinder head, wherein each combustion chamber is assigned an exhaust duct formed in the cylinder head and a plurality of exhaust ducts in the region of an exhaust manifold common confluence area.
  • the internal combustion engine according to the invention includes a common confluence region for exhaust gases, which is bounded on a first side by at least one wall of the cylinder head and on a second side by a separate, externally attached to the cylinder head shell element, the shell element for guiding the exhaust gas flow at least partially funnel-shaped and / or trough-shaped curved executed.
  • a plurality of outlet channels are preferably provided on the first side of the common confluence region, which are embodied in one piece as components of the cylinder head, in particular by casting methods, and open into the common confluence region.
  • a trough-shaped recess is provided on the cylinder head on the outside, which is preferably bounded or defined by a plurality of integrally cast walls of the cylinder head.
  • the trough-shaped depression is sealingly closed towards the outside by means of the shell element, so that a space between the recess on the side of the cylinder head and the shell element is formed. volume results, in which several exhaust gas streams can be combined and deflected. This volume of space is thus formed partly within the cylinder head and partly outside the cylinder head.
  • a mounting flange for the sealed fastening of the shell element on the cylinder head and an outlet opening with a pipe flange for mounting an exhaust pipe or an exhaust gas cleaning unit are provided on the shell element on the one hand, mounting flange and pipe flange have different dimensions.
  • the substantially annular mounting flange defines a planar or curved separating plane between the cylinder head and the shell element, wherein the parting plane passes through the geometric area or the volume of space and subdivides it geometrically.
  • the pipe flange is designed to be smaller than the mounting flange, at least with regard to a geometric dimension, in particular with regard to a maximum transverse extent and / or its diameter and / or the cross-section through which it can flow.
  • the outlet opening is designed with a pipe flange for mounting an exhaust gas guide unit of an exhaust gas turbocharger.
  • this makes it possible to mount the exhaust-gas turbocharger close to the cylinder head, wherein on the one hand a compact design can be realized and, on the other hand, energy losses, which occur as heat losses due to long flow paths, can be reduced. The performance of the exhaust gas turbocharger can thus be easily increased.
  • the pipe flange is designed to be double-flowed with a first flow and a second flow
  • the shell element has integrated exhaust gas passages on.
  • the integrated exhaust ducts are designed as a combination of the exhaust ducts, wherein end portions of the integrated exhaust ducts open into the first flood and / or into the second flood.
  • a trained with two floods exhaust guide section can be mounted.
  • the shell element is designed in one piece with the exhaust gas guide section.
  • FIG. 1 shows a schematically illustrated section through a cylinder head of an internal combustion engine according to the invention with an exhaust manifold
  • FIG. 3 in a sketched representation of a shell element with integrated exhaust ducts of the internal combustion engine according to the invention.
  • Fig. 4 in a sketched representation of the shell element acc. Fig. 3 in a variant.
  • Fig. 1 shows a horizontal section through a cylinder head of an internal combustion engine according to the invention, which has six cylinders in two separate, V-shaped cylinder banks, in which an air / fuel mixture can be relegated under pressure and heat release.
  • the combustion can be carried out using the diesel process, the gasoline process or a similar combustion process.
  • Three cylinders in the present case have three combustion chambers which are delimited by a common cylinder head 1, which is preferably produced in one piece in a casting process.
  • Each combustion chamber is assigned two outlet channels 2 formed in the cylinder head 1, which can be closed in a manner known per se by way of exhaust valves (not shown).
  • the outlet channels 2 are preferably curved in the direction of the downstream exhaust pipe and positioned closely adjacent to a cylinder head fitting and / or closely adjacent to lubricating oil return bores.
  • the described plurality of six outlet channels 2 of a cylinder bank is assigned a common confluence region 3a in the region of an outlet manifold 3, in which the exhaust gas streams guided through the outlet channels 2 are combined.
  • the common confluence region 3 a is bounded on a first side A by a wall 1 a of the cylinder head 1.
  • the wall Ia of the cylinder head is executed in the main ⁇ trough or pot-shaped and surrounded by a mounting surface Ib annular. Within the wall Ia passages to the outlet channels 2 are formed, which are arranged ⁇ outgoing from a along the annular mounting surface Ib to be defined, non-annular separation surface T reset.
  • the confluence region 3a is provided by a separate, externally attached to the cylinder head.
  • Bound shell element 4 is limited, which limits the confluence region 3 a as part of the exhaust manifold 3 to the outside.
  • the shell element 4 is preferably made of a temperature-resistant metal sheet, in particular of a sheet steel, or produced as a metal casting and at least partially funnel-shaped and / or trough-shaped curved. Its simple shape allows a particularly simple and inexpensive production of the shell element.
  • the shell element has a circumferential annular groove, which engages in the region of the trough-shaped mounting surface in the cylinder head.
  • the shell element is designed double-walled.
  • the shell element is made comparatively narrow, whereby the seal between the cylinder head and the shell element is improved.
  • the shell element 4 has, in particular detachable fastening by means of screws on a mounting flange 4a, which is designed adjacent to the mounting surface Ib.
  • a mounting flange 4a which is designed adjacent to the mounting surface Ib.
  • one or more preferably annular sealing elements can be used between mounting surface 1b and mounting flange 4a, which come to lie in the parting plane T.
  • a pipe flange 4b is provided on the shell element 4, whose flow-through cross section differs with respect to ⁇ essential geometric dimensions of that of the mounting flange 4a.
  • the pipe flange has a substantially circular passage cross-section, so that immediately adjacent a cylindrical pipe element can be mounted.
  • the tubular element may be part of an exhaust pipe and / or a Exhaust gas purification unit (catalyst, filter or the like).
  • the trough-shaped depression is sealingly closed towards the outside by means of the shell element 4, so that a volume of space results between the depression on the cylinder head 1 and the shell element 4, in which several exhaust gas streams can be combined, diverted and forwarded to a downstream exhaust system.
  • This volume of space is thus formed partly within the cylinder head (side A) and partly outside the cylinder head (side B), resulting in a particularly simple and cost-realizable construction of two approximately vertically divided halves.
  • constructive measures e.g. Dimensioning of the shape and depth of the shell member and the corresponding recess on the part of the cylinder head 1 set a desired heat transfer behavior.
  • a heat input into the cooling water compared to a fully integrated into the cylinder head design of the exhaust manifold reduced so that there is a faster heating downstream exhaust purification units.
  • an exhaust gas turbocharger is assigned ⁇ assigns the exhaust gas guide portion of exhaust gas, which is discharged via the outlet channels 2 from the cylinders, by ⁇ strömbar.
  • a wheel ⁇ turbine rotatably mounted, which is acted upon by the exhaust gas, and is set in a rotational movement.
  • the turbine wheel with the aid of a shaft with a Verdich ⁇ terrad rotatably connected, which is mounted in a Lucasmentsab ⁇ cut, and the compression of sucked air serves.
  • the exhaust gas guide section has at its inlet opening a flange, which is connectable to the pipe flange 4b, so that the exhaust gas can flow over the pipe flange 4b into the exhaust gas guide section.
  • the pipe flange 4b is to be designed in particular with regard to a reduction of the flow losses.
  • a bypassing is provided for bypassing the exhaust gas guide section, wherein the bypassing is formed in the shell element 4.
  • the wall Ia of the cylinder head ⁇ is here substantially flat, the parting plane T reasonable fit executed.
  • FIG. 3 shows a first integrated exhaust duct 5a, which is designed as a combination of a first exhaust duct 6 and a third exhaust duct 8, and a second integrated exhaust duct 5b, which is designed as a combination of a second exhaust duct 7 and the fourth exhaust duct 9.
  • the pipe flange 4b is designed in a double-flow, wherein a first end portion 10 of the first integrated exhaust duct 5a in a not closer shown first tide of the pipe flange 4b and a second end portion 11 of the second integrated pipe section 5b in a non-illustrated second tide of the pipe flange 4b open.
  • This shell element 4 is predestined for combination with a double-flow exhaust pipe section.
  • a water-cooled aluminum turbine housing can be used, wherein the cooling circuit is fed by a cooling circuit of the cylinder head,
  • a device for the removal of exhaust gas for exhaust gas recirculation can be integrated,
  • a wastegate flap for bypassing the exhaust gas guide section or at least of the turbine wheel can be integrated,
  • a heat input into the vehicle is lower, since the manifold surface, via which the exhaust heat is delivered to the vehicle, is smaller than in a conventional Krümmer thesis.
  • the shell element 4 is shown in an alternative form.
  • the shell element 4 has the integrated exhaust gas channel 5a, which is designed as a combination of the first outlet channel 6, the second outlet channel 7 and a third outlet channel 8.
  • the exhaust duct 5a could be formed as a combination of the first exhaust duct 6, the second exhaust duct 7, the third exhaust duct 8 and the fourth exhaust duct 9.
  • the pipe flange 4b is designed in single-flow.
  • This shell element 4 is in particular suitable for combination with a single-flow designed exhaust gas guide section, wherein the end section 10 of the integrated exhaust gas channel 5a opens into an inlet channel of the exhaust gas guide unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

La présente invention concerne un moteur à combustion interne comprenant plusieurs chambres de combustion en forme de cylindres, dans lesquels un mélange air/carburant peut être transformé selon une réaction exothermique. Les chambres de combustion sont délimitées par une culasse commune (1). Un canal d'échappement (2) placé dans la culasse (1) est associé à chaque chambre de combustion et plusieurs canaux d'échappement (2) débouchent dans une zone de confluence commune (3a) dans la région d'un collecteur d'échappement (3). Selon l'invention, la zone de confluence commune (3a) est délimitée d'un premier côté (A) par au moins une paroi (1a) de la culasse et d'un deuxième côté (B) par un élément de coque séparé (4) appliqué sur l'extérieur de la culasse, lequel élément de coque (4) est incurvé au moins par endroits en forme d'entonnoir et/ou de cuvette afin de guider le flux de gaz d'échappement.
PCT/EP2008/009109 2007-12-06 2008-10-29 Moteur à combustion interne à plusieurs chambres de combustion Ceased WO2009071158A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007058754A DE102007058754A1 (de) 2007-12-06 2007-12-06 Brennkraftmaschine mit mehreren Brennräumen
DE102007058754.8 2007-12-06

Publications (1)

Publication Number Publication Date
WO2009071158A1 true WO2009071158A1 (fr) 2009-06-11

Family

ID=40193757

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/009109 Ceased WO2009071158A1 (fr) 2007-12-06 2008-10-29 Moteur à combustion interne à plusieurs chambres de combustion

Country Status (2)

Country Link
DE (1) DE102007058754A1 (fr)
WO (1) WO2009071158A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010012873A1 (de) * 2010-03-26 2012-08-23 Bayerische Motoren Werke Aktiengesellschaft Zylinderkopf mit Abgaskrümmer sowie Abgasabströmanordnung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0718480A1 (fr) * 1994-11-25 1996-06-26 Société Anonyme dite: REGIE NATIONALE DES USINES RENAULT Dispositif d'échappement pour moteur à combustion interne
EP0849445A1 (fr) * 1996-12-20 1998-06-24 Zeuna-Stärker Gmbh & Co Kg Collecteur d'échappement et procédé pour sa fabrication
DE10141534A1 (de) 2000-08-25 2002-06-20 Honda Motor Co Ltd Zylinderkopf einer Mehrzylinder-Brennkraftmaschine mit innen liegenden Auslasskanälen
EP1389267A2 (fr) * 2001-01-29 2004-02-18 Hans A. Haerle Collecteur d'echappement
WO2004090297A2 (fr) * 2003-04-10 2004-10-21 Avl List Gmbh Moteur a combustion interne
FR2863305A1 (fr) * 2003-12-04 2005-06-10 Renault Sas Agencement pour le raccordement etanche de deux conduits dans une ligne d'echappement et moteur comportant un tel agencement
FR2897101A1 (fr) * 2006-02-08 2007-08-10 Renault Sas Dispositif de fixation d'un collecteur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0718480A1 (fr) * 1994-11-25 1996-06-26 Société Anonyme dite: REGIE NATIONALE DES USINES RENAULT Dispositif d'échappement pour moteur à combustion interne
EP0849445A1 (fr) * 1996-12-20 1998-06-24 Zeuna-Stärker Gmbh & Co Kg Collecteur d'échappement et procédé pour sa fabrication
DE10141534A1 (de) 2000-08-25 2002-06-20 Honda Motor Co Ltd Zylinderkopf einer Mehrzylinder-Brennkraftmaschine mit innen liegenden Auslasskanälen
EP1389267A2 (fr) * 2001-01-29 2004-02-18 Hans A. Haerle Collecteur d'echappement
WO2004090297A2 (fr) * 2003-04-10 2004-10-21 Avl List Gmbh Moteur a combustion interne
FR2863305A1 (fr) * 2003-12-04 2005-06-10 Renault Sas Agencement pour le raccordement etanche de deux conduits dans une ligne d'echappement et moteur comportant un tel agencement
FR2897101A1 (fr) * 2006-02-08 2007-08-10 Renault Sas Dispositif de fixation d'un collecteur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010012873A1 (de) * 2010-03-26 2012-08-23 Bayerische Motoren Werke Aktiengesellschaft Zylinderkopf mit Abgaskrümmer sowie Abgasabströmanordnung

Also Published As

Publication number Publication date
DE102007058754A1 (de) 2009-06-10

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