EP0782667A1 - Combustion air duct of an internal combustion engine - Google Patents

Combustion air duct of an internal combustion engine

Info

Publication number
EP0782667A1
EP0782667A1 EP95933384A EP95933384A EP0782667A1 EP 0782667 A1 EP0782667 A1 EP 0782667A1 EP 95933384 A EP95933384 A EP 95933384A EP 95933384 A EP95933384 A EP 95933384A EP 0782667 A1 EP0782667 A1 EP 0782667A1
Authority
EP
European Patent Office
Prior art keywords
air line
charge air
internal combustion
combustion engine
trough
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
EP95933384A
Other languages
German (de)
French (fr)
Other versions
EP0782667B1 (en
Inventor
Hubert Hitziger
Peter LÜKE
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.)
Caterpillar Energy Solutions GmbH
Original Assignee
Motoren Werke Mannheim 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 Motoren Werke Mannheim AG filed Critical Motoren Werke Mannheim AG
Publication of EP0782667A1 publication Critical patent/EP0782667A1/en
Application granted granted Critical
Publication of EP0782667B1 publication Critical patent/EP0782667B1/en
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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10288—Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • 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
    • F02M33/00—Other apparatus for treating combustion-air, fuel or fuel-air mixture
    • F02M33/02—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10281—Means to remove, re-atomise or redistribute condensed fuel; Means to avoid fuel particles from separating from the mixture
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/116—Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft

Definitions

  • the invention relates to an internal combustion engine with a crankcase, in which a crankshaft is rotatably mounted, on which at least one connecting rod is articulated, which carries a piston which is movable in a cylinder tube covered by a cylinder head, wherein gas exchange valves with an exhaust pipe are inserted into the cylinder head and a combustion air line are connected.
  • the invention has for its object to provide an internal combustion engine with a combustion air line that avoids the disadvantages described above and also ensures a largely oil-free supply of combustion air to the individual cylinders.
  • combustion air line has an oil trap at the geodetically lowest point, which is designed as a trough. It is thereby achieved that the oil entrained in the combustion air, which settles on the walls of the combustion air line as it flows through and thus separates from the combustion air, in the area below the Combustion air line arranged tub collects. The oil collected in this way can then be discharged in a suitable form and fed to the oil circuit of the internal combustion engine.
  • the trough is made in one piece with the combustion air line and the cross-sectional area of the trough forms an additional area to the cross-sectional area of the combustion air line.
  • the combustion air line is essentially tubular.
  • the trough is at least approximately trapezoidal, the trapezoidal side walls of which are arranged below the equatorial plane in a straight extension of the walls of the combustion air line.
  • the combustion air line is a charge air line and can be composed of charge air line sections.
  • the combustion air line is a charge air line and can be composed of charge air line sections.
  • an oil trap in the form of a trough can advantageously be used. Assembling the charge air line from individual charge air line sections is particularly advantageous for an internal combustion engine of a series manufactured in several variants if, for example, different numbers of cylinders are to be realized.
  • a 16-cylinder V internal combustion engine it is possible and provided in a 16-cylinder V internal combustion engine to connect the charge air line sections of two adjacent cylinders of a row and the corresponding opposite row of cylinders to a charge air line section, so that this charge air line section supplies four cylinders with charge air.
  • an 8-cylinder version for example, a 12-cylinder version and the aforementioned 16-cylinder version with identically designed charge air line sections can be realized.
  • the trough is composed of trough sections corresponding to the charge air line sections. This training is suitable for a technically simple and inexpensive manufacture of a charge air line designed in this way.
  • the trough sections have bulkheads at their longitudinal ends, which correspond to the contour of the tubular charge air line.
  • these bulkheads ensure further stiffening of the trough sections together with the charge air line sections and, moreover, they bring about a calming of the flow in the trough sections.
  • the oil separated from the charge air can settle in the trough and be carried away without being entrained by the air flow.
  • a cooling water line is integrally formed on the charge air line at the geodetically highest point.
  • the cooling water line is divided according to the charge air line sections. Through this cooling water line or these cooling water line sections, the cooling water, which is introduced into the line via connecting pieces from the cylinder heads of the internal combustion engine, is returned to a cooling water heat exchanger.
  • the combination of the cooling water line with the charge air line thus contributes to a further reduction in the construction and manufacturing costs of the internal combustion engine, since the cooling water must be removed from the same cylinder heads, which in turn have to be supplied with charge air.
  • the cooling water line connects directly to the charge air line, so that both lines have a common partition.
  • This training ensures a further manufacturing technology and also cost-effective design.
  • the charge air line and the cooling water line are made in one piece, but not with a common partition. This configuration achieves thermal insulation of both lines, which may be necessary in certain applications.
  • the charge air line and the cooling water line have external fastening flanges. This design enables simple connection of the individual line sections to one another and at the end regions with corresponding covers or connecting pieces.
  • the trough has recesses which are accessible from the outside at one end and which allow the insertion of fastening screws into fastening holes embedded in the bulkhead. Furthermore, in the opposite end of the tub in the bulkhead there are the mounting holes opposite
  • the intake manifold connecting the charge air line with the inlet ducts of the individual cylinder heads are integrally formed on the cylinder heads and designed so that they rest on corresponding openings in the charge air line with the insertion of an elastic round seal. Due to the rigid design of the charge air line according to the invention and the selected arrangement of the charge air line in the V space, the intake manifold can be made very short and no additional screw connections between the intake manifold and the charge air line need be provided.
  • Figure 1 A cross section through a charge air line inserted in the V-space of an internal combustion engine with molded-on trough and attached cooling water line and
  • Figure 2 a charge air line section with molded cooling water line and tub in plan view.
  • the charge air line 1 is inserted into the V space between the two rows of cylinders of a V-shaped internal combustion engine.
  • the charge air line 1 is composed of individual charge air line sections 2.
  • the individual charge air line sections have fastening sockets 3, through which fastening screws are guided, with which the assemblies to form the charge air line 1 are connected
  • Charge air line sections 2 can be fastened in the V space of the internal combustion engine.
  • the internal combustion engine also has a crankcase 4, only partially shown, on which an intermediate housing 5 is placed, which establishes the connection to a cylinder head 6.
  • a piston 9, which is connected to a crankshaft via a connecting rod, can be moved in the cylinder tube 7.
  • the cylinder tube 7 can be cooled by cooling water in the area surrounded by the intermediate housing 5, the cooling water being passed on from the intermediate housing into the cylinder head 6, which is also to be cooled. From the cylinder head 6, the cooling water is conducted at the highest point through a pipe section 11 into a cooling water line 10 arranged above the charge air line 1.
  • the cooling water line 10 is arranged in one piece on the charge air line 1 via spacing feet 12. According to an embodiment, not shown, it is also provided to arrange the cooling water line 10 directly on the charge air line 1 with the omission of the feet 12, so that the two lines have a common partition.
  • the charge air line 1 also has charge air connections 13 which cooperate with connecting pieces 14 to the inlet channels of the cylinder heads 6. These connecting pieces 14 lie on the charge air connections 13 without an additional screw connection, with the insertion of an elastic seal 15.
  • a trough 16 is also formed on the charge air line 1 and is arranged at the geodetically lowest point of the charge air line 1.
  • the trough 16 has an essentially trapezoidal shape, with the shorter trapezoidal leg at its geodetically lowest point.
  • the trough 16 collects the oil which is discharged in the charge air line 1 and is deposited on the walls. This collected oil can then be removed in a suitable form. It can be seen in FIG. 1 that the trough surface does not influence, in particular does not reduce, the cross-sectional area of the charge air line 1, so that the flow of the charge air, for example by narrowing the cross section, is largely excluded.
  • the trough has bulkheads 17 which correspond to the contour of the tubular charge air line, that is to say the bulkheads 17 have an arcuate configuration with the charge air line 1.
  • the individual charge air line sections 2 according to FIG. 2 have flanges 18a, 18b at their front ends, into which openings are inserted, through which the charge air line sections 2 can be screwed together. Similar flanges are provided on the cooling water line 10.
  • the tub 16, however, has at the front end 18b an externally accessible indentation 19, which the insertion of fastening screws into the Bulkhead allow 17 recessed mounting holes.
  • blind hole threads opposite the fastening holes are embedded in the bulkhead 17. The fastening screws are screwed into this.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

A combustion air duct of the known type has a complex shape and is accordingly costly to manufacture. Furthermore, the conventional design does not produce optimal flow characteristics. The present invention solves the problem of producing an internal combustin engine with a charge duct (1) which does not have these drawbacks and in addition ensures a nearly oil-free delivery of combustion air to individual cylinders. This is achieved by providing the charge duct (1) at its lowest point with an oil trap in the form of a sump (16). This ensures that the oil carried in the combustion air and deposited by precipitation during its passage through the charge duct (1) on the duct walls collects in the sump (16) underneath the charge duct (1). The collected oil can then be drawn off in the appropriate form and fed back into the engine's oil circulation system.

Description

Verbrennungsluftleitung einer Brennkraftmaschine Combustion air line of an internal combustion engine
B E S C H R E I B UN GDESCRIPTION
Die Erfindung betrifft eine Brennkraftmaschine mit einem Kurbelgehäuse, in dem eine Kurbelwelle drehbar gelagert ist, an der zumindest ein Pleuel angelenkt ist, das einen Kolben trägt, der in einem von einem Zylinderkopf abgedeckten Zylinderrohr bewegbar ist, wobei in den Zylinderkopf eingelassene Gaswechselventile mit einer Abgasleitung und einer Verbrennungsluftleitung verbunden sind.The invention relates to an internal combustion engine with a crankcase, in which a crankshaft is rotatably mounted, on which at least one connecting rod is articulated, which carries a piston which is movable in a cylinder tube covered by a cylinder head, wherein gas exchange valves with an exhaust pipe are inserted into the cylinder head and a combustion air line are connected.
Eine derartige Brennkraftmaschine mit einer Verbrennungsluftleitung ist aus der EP-A 0 448 431 bekannt. Diese Verbrennungsluftleitung ist kompliziert geformt, so daß der Herstellungsaufwand erheblich ist. Zudem sind durch diese Ausgestaltung die Strömungsverhältnisse nicht optimal.Such an internal combustion engine with a combustion air line is known from EP-A 0 448 431. This combustion air line is complicated in shape, so that the manufacturing effort is considerable. In addition, the flow conditions are not optimal due to this configuration.
Der Erfindung liegt die Aufgabe zugrunde, eine Brennkraftmaschine mit einer Verbrennungsluftleitung bereitzustellen, die die zuvor geschilderten Nachteile vermeidet und darüber hinaus für eine weitgehend ölfreie Verbrennungsluftzuführung zu den einzelnen Zylindern sorgt.The invention has for its object to provide an internal combustion engine with a combustion air line that avoids the disadvantages described above and also ensures a largely oil-free supply of combustion air to the individual cylinders.
Diese Aufgabe wird dadurch gelöst, daß die Verbrennungsluftleitung an geodätisch niedrigster Stelle eine Ölfangvorrichtung aufweist, die als Wanne ausgebildet ist. Dadurch wird erreicht, daß das in der Ver¬ brennungsluft mitgeführte Öl, das sich während des Durchströmens durch die Verbrennungsluftleitung an deren Wänden absetzt und somit aus der Verbrennungsluft ausscheidet, in der unterhalb der Verbrennungsluftleitung angeordneten Wanne sammelt. Das so gesammelte Öl kann dann in geeigneter Form abgeleitet und dem Ölkreislauf der Brennkraftmaschine zugeführt werden.This object is achieved in that the combustion air line has an oil trap at the geodetically lowest point, which is designed as a trough. It is thereby achieved that the oil entrained in the combustion air, which settles on the walls of the combustion air line as it flows through and thus separates from the combustion air, in the area below the Combustion air line arranged tub collects. The oil collected in this way can then be discharged in a suitable form and fed to the oil circuit of the internal combustion engine.
In Weiterbildung der Erfindung ist die Wanne einstückig mit der Ver¬ brennungsluftleitung gefertigt und die Querschnittsfläche der Wanne bildet eine Zusatzfläche zu der Querschnittsfläche der Verbrennungsluftleitung. Die Verbrennungsluftleitung ist dabei im wesentlichen rohrförmig ausgebildet. Die Wanne ist zumindest angenähert trapezförmig ausgebildet, wobei sich deren trapezförmige Seitenwände unterhalb der Äquatorebene in geradliniger Verlängerung der Wände der Verbrennungsluftleitung angeordnet. Durch diese Ausbildung ist eine fertigungstechnisch sehr günstig zu realisierende Form realisiert, die zudem ausgesprochen steif und somit auch bezüglich der Geräuschemission sehr günstig ist.In a further development of the invention, the trough is made in one piece with the combustion air line and the cross-sectional area of the trough forms an additional area to the cross-sectional area of the combustion air line. The combustion air line is essentially tubular. The trough is at least approximately trapezoidal, the trapezoidal side walls of which are arranged below the equatorial plane in a straight extension of the walls of the combustion air line. This design realizes a form that is very cheap to manufacture, which is also extremely rigid and therefore also very favorable in terms of noise emission.
In Weiterbildung der Erfindung ist die Verbrennungsluftleitung eine Ladeluftleitung und aus Ladeluftleitungsabschnitten zusammensetzbar. Gerade bei aufgeladenen Brennkraftmaschinen wird beobacht, daß über die Kurbelgehäuseentlüftung mitgeführtes Öl trotz eines Ölabscheiders nicht so weit aus der anschließend verdichtenden Verbrennungsluft ausgeschieden ist, daß in der nachfolgenden Ladeluftleitung keine weitere Ölabscheidung mehr erfolgt. Daher ist insbesondere bei einer Ladeluftleitung eine Ölfangvorrichtung in Form einer Wanne vorteilhaft einsetzbar. Die Ladeluftleitung aus einzelnen Ladeluftleitungsabschnitten zusammenzusetzen, ist insbesondere für eine in mehreren Varianten gefertigte Brennkraftmaschine einer Baureihe vorteilhaft, wenn beispielsweise verschiedene Zylinderzahlen realisiert werden sollen. So ist es beispielsweise im Rahmen der Erfindung möglich und vorgesehen bei einer 16-zylindrigen V- Brennkraftmaschine die Ladeluftleitungsabschnitte von zwei benachbarten Zylindern einer Reihe und der entsprechenden gegenüberliegenden Zylinderreihe an einem Ladeluftleitungsabschnitt anzuschließen, so daß dieser Ladeluftleitungsabschnitt vier Zylinder mit Ladeluft versorgt. Somit kann durch einfaches Aneinandersetzen von Ladeluftleitungsabschnitten beispielsweise eine 8-Zyiinderversion, eine 12-Zylinderversion und die erwähnte 16-Zylinderversion mit identisch ausgebildeten Ladeluftleitungsabschnitten realisiert werden.In a further development of the invention, the combustion air line is a charge air line and can be composed of charge air line sections. Especially in the case of supercharged internal combustion engines, it is observed that, despite an oil separator, oil carried along via the crankcase ventilation is not so far removed from the subsequently compressed combustion air that no further oil separation takes place in the subsequent charge air line. Therefore, in particular in the case of a charge air line, an oil trap in the form of a trough can advantageously be used. Assembling the charge air line from individual charge air line sections is particularly advantageous for an internal combustion engine of a series manufactured in several variants if, for example, different numbers of cylinders are to be realized. For example, in the context of the invention it is possible and provided in a 16-cylinder V internal combustion engine to connect the charge air line sections of two adjacent cylinders of a row and the corresponding opposite row of cylinders to a charge air line section, so that this charge air line section supplies four cylinders with charge air. Thus, by simply placing charge air duct sections together, an 8-cylinder version, for example, a 12-cylinder version and the aforementioned 16-cylinder version with identically designed charge air line sections can be realized.
In Weiterbildung der Erfindung ist die Wanne aus Wannenabschnitten entsprechend den Ladeluftleitungsabschnitten zusammengesetzt. Diese Ausbildung bietet sich für ein produktionstechnisch einfaches und kostengünstiges Herstellen einer derart ausgebildeten Ladeluftleitung an.In a development of the invention, the trough is composed of trough sections corresponding to the charge air line sections. This training is suitable for a technically simple and inexpensive manufacture of a charge air line designed in this way.
In Weiterbildung der Erfindung weisen die Wannenabschnitten an ihren längsseitigen Enden Schottwände auf, die der Kontur der rohrförmigen Ladeluftleitung entsprechen. Diese Schottwände gewährleisten einerseits eine weitere Versteifung der Wannenabschnitte mitsamt den Ladeluftleitungsabschnitten und sie bewirken darüber hinaus eine Strömungsberuhigung in den Wannenabschnitten. Dadurch kann das aus der Ladeluft aus¬ geschiedene Öl sich ohne weiter von der Luftströmung mitgerissen zu werden in der Wanne absetzen und abgeführt werden.In a further development of the invention, the trough sections have bulkheads at their longitudinal ends, which correspond to the contour of the tubular charge air line. On the one hand, these bulkheads ensure further stiffening of the trough sections together with the charge air line sections and, moreover, they bring about a calming of the flow in the trough sections. As a result, the oil separated from the charge air can settle in the trough and be carried away without being entrained by the air flow.
In Weiterbildung der Erfindung ist an die Ladeluftleitung an geodätisch höchster Stelle eine Kühlwasserleitung einstückig angeformt. Dabei ist die Kühlwasserleitung entsprechend den Ladeluftleitungsabschnitten unterteilt. Durch diese Kühlwasserleitung beziehungsweie diese Kühlwasserleitungsabschnitte wird das Kühlwasser, das über Verbindungsstücke von den Zylinderköpfen der Brennkraftmaschine in diese Leitung eingeleitet wird zu einem Kühlwasserwärmetauscher zurückgeführt. Die Kombination der Kühlwasserleitung mit der Ladeluftleitung trägt also mit zu einer weiteren Verringerung des Bau- und Fertigungsaufwandes der Brennkraftmaschine bei, da das Kühlwasser aus den gleichen Zylinderköpfen, die umgekehrt mit Ladeluft versorgt werden müssen, abgeführt werden muß.In a further development of the invention, a cooling water line is integrally formed on the charge air line at the geodetically highest point. The cooling water line is divided according to the charge air line sections. Through this cooling water line or these cooling water line sections, the cooling water, which is introduced into the line via connecting pieces from the cylinder heads of the internal combustion engine, is returned to a cooling water heat exchanger. The combination of the cooling water line with the charge air line thus contributes to a further reduction in the construction and manufacturing costs of the internal combustion engine, since the cooling water must be removed from the same cylinder heads, which in turn have to be supplied with charge air.
In Weiterbildung der Erfindung schließt die Kühlwasserleitung direkt an die Ladeluftleitung an, so daß beide Leitungen eine gemeinsame Trennwand aufweisen. Diese Ausbildung gewährleistet eine weitere fertigungstechnisch und auch kostenmäßig günstige Ausgestaltung. Im Rahmen der Erfindung ist es aber auch vorgesehen, die Ladeluftleitung und die Kühlwasserleitung zwar einstückig, aber nicht mit einer gemeinsamen Trennwand auszubilden. Durch diese Ausgestaltung wird eine thermische Isolation von beiden Leitungen erreicht, die bei bestimmten Anwendungsfällen nötig sein kann.In a further development of the invention, the cooling water line connects directly to the charge air line, so that both lines have a common partition. This training ensures a further manufacturing technology and also cost-effective design. In the context of the invention, however, it is also provided that The charge air line and the cooling water line are made in one piece, but not with a common partition. This configuration achieves thermal insulation of both lines, which may be necessary in certain applications.
In Weiterbildung der Erfindung weisen die Ladeluftleitung und die Kühlwasserleitung außenliegende Befestigungsflansche auf. Diese Ausbildung ermöglicht ein einfaches Verbinden der einzelnen Leitungsabschnitte untereinander und an den Endbereichen mit entsprechenden Deckeln oder Anschlußstücken.In a further development of the invention, the charge air line and the cooling water line have external fastening flanges. This design enables simple connection of the individual line sections to one another and at the end regions with corresponding covers or connecting pieces.
In Weiterbildung der Erfindung weist die Wanne an einem stirnseitigen Ende von außen zugängliche Einbuchtungen auf, die das Einführen von Befestigungsschrauben in in die Schottwand eingelassene Befestigungslöcher ermöglichen. Weiterhin sind in dem gegenüberliegenden stirnseitigen Ende der Wanne in die dortige Schottwand den Befestigungslöchern gegenüberliegendeIn a further development of the invention, the trough has recesses which are accessible from the outside at one end and which allow the insertion of fastening screws into fastening holes embedded in the bulkhead. Furthermore, in the opposite end of the tub in the bulkhead there are the mounting holes opposite
Sacklochgewinde eingelassen. Diese Ausbildung ermöglicht in dem Bereich der Wanne eine sehr platzsparende und die Außenkontur der Ladeluftleitung mit der Wanne in diesem Bereich nicht vergrößernde Befestigungsmöglichkeit, die bezüglich der Funktionsfähigkeit durch die verringerte Querschnittsfläche nicht von Nachteil ist. Dadurch kann die Ladeluftleitung mit der Wanne durch diese optimierte Aus¬ gestaltung tief in den V-Raum zwischen den zwei Zylinderreihen einer V-Brennkraftmaschine eingelassen werden. Dadurch wird insgesamt die Bauhöhe der Brennkraftmaschine reduziert.Blind hole thread inserted. This design enables a very space-saving fastening option in the area of the trough and the outer contour of the charge air line with the trough in this area does not increase, which is not disadvantageous in terms of functionality due to the reduced cross sectional area. As a result of this optimized configuration, the charge air line with the trough can be let deep into the V space between the two cylinder rows of a V internal combustion engine. As a result, the overall height of the internal combustion engine is reduced.
Im übrigen sind die Ansaugieitungsstutzen, die die Ladeluftleitung mit den Einlaßkanälen der einzelnen Zylinderköpfe verbinden, einstückig an die Zylinderköpfe angeformt und so ausgebildet, daß sie unter Einfügung einer elastischen Runddichtung auf entsprechenden Öffnungen in der Ladeluftieitung aufliegen. Durch die erfindungsgemäße steife Ausbildung der Ladeluftleitung und die gewählte Anordnung der Ladeluftleitung in dem V-Raum können die Ansaugstutzen sehr kurz ausgebildet sein und es brauchen keine zusätzlichen Verschraubungen zwischen den Ansaugstutzen und der Ladeluftleitung vorgesehen sein. Vorteilhafte Weiterbildungen der Erfindung sind der Zeichnungsbeschreibung zu entnehmen, in der ein in den Figuren dargestelltes Ausführungsbeispiel der Erfindung näher beschrieben ist.In addition, the intake manifold connecting the charge air line with the inlet ducts of the individual cylinder heads are integrally formed on the cylinder heads and designed so that they rest on corresponding openings in the charge air line with the insertion of an elastic round seal. Due to the rigid design of the charge air line according to the invention and the selected arrangement of the charge air line in the V space, the intake manifold can be made very short and no additional screw connections between the intake manifold and the charge air line need be provided. Advantageous developments of the invention can be found in the drawing description, in which an embodiment of the invention shown in the figures is described in more detail.
Es zeigen:Show it:
Figur 1 : Ein Querschnitt durch eine in den V-Raum einer Brennkraft¬ maschine eingesetzte Ladeluftleitung mit angeformter Wanne und aufgesetzter Kühlwasserleitung undFigure 1: A cross section through a charge air line inserted in the V-space of an internal combustion engine with molded-on trough and attached cooling water line and
Figur 2: einen Ladeluftleitungsabschnitt mit angeformter Kühlwasserleitung und Wanne in der Draufsicht.Figure 2: a charge air line section with molded cooling water line and tub in plan view.
Die erfindungsgemäße Ladeluftleitung 1 ist in den V-Raum zwischen den beiden Zylinderreihen einer V-förmig ausgebildeten Brennkraftmaschine eingesetzt. Dabei ist die Ladeluftleitung 1 aus einzelnen Ladeluftleitungsabschnitten 2 zusammengesetzt. Die einzelnen Ladeluftleitungsabschnitte weisen Befestigungsstutzen 3 auf, durch die Befestigungsschrauben geführt werden, mit denen die zu der Ladeluftleitung 1 zusammengesetztenThe charge air line 1 according to the invention is inserted into the V space between the two rows of cylinders of a V-shaped internal combustion engine. The charge air line 1 is composed of individual charge air line sections 2. The individual charge air line sections have fastening sockets 3, through which fastening screws are guided, with which the assemblies to form the charge air line 1 are connected
Ladeluftleitungsabschnitte 2 in dem V-Raum der Brennkraftmaschine befestigbar sind. Die Brennkraftmaschine weist im übrigen ein nur teilweise dargestelltes Kurbelgehäuse 4 auf, auf das ein Zwischengehäuse 5 aufgesetzt ist, das die Verbindung zu einem Zylinderkopf 6 herstellt. In das Zwischengehäuse 5 ist ein bis in das Kurbelgehäuse 4 ragedes Zylinderrohr 7 eingesetzt, das mit einem umlaufenden Bund 8 zwischen dem Zwischengehäuse 5 und dem Zylinderkopf 6 verspannt ist. In dem Zylinderrohr 7 ist ein Kolben 9, der über ein Pleuel mit einer Kurbelwelle verbunden ist, bewegbar.Charge air line sections 2 can be fastened in the V space of the internal combustion engine. The internal combustion engine also has a crankcase 4, only partially shown, on which an intermediate housing 5 is placed, which establishes the connection to a cylinder head 6. A cylinder tube 7, which extends into the crankcase 4 and is clamped with a circumferential collar 8 between the intermediate housing 5 and the cylinder head 6, is inserted into the intermediate housing 5. A piston 9, which is connected to a crankshaft via a connecting rod, can be moved in the cylinder tube 7.
Das Zylinderrohr 7 ist in dem von dem Zwischengehäuse 5 umgebenen Bereich durch Kühlwasser kühlbar, wobei das Kühlwasser von dem Zwischengehäuse in den ebenfalls zu kühlenden Zylinderkopf 6 weitergeleitet wird. Von dem Zylinderkopf 6 wird das Kühlwasser an der höchsten Stelle durch ein Rohrstück 1 1 in eine oberhalb der Ladeluftleitung 1 angeordnete Kühlwasserleitung 10 geleitet. In dem Ausführungsbeispiel gemäß Figur 1 ist die Kühlwasserleitung 10 über abstandshaltende Füße 12 einstückig auf der Ladeluftleitung 1 angeordnet. Gemäß einer nicht dargestellten Ausführungsform ist es aber auch vorgesehen, die Kühlwasserleitung 10 unter Weglassung der Füße 12 direkt auf der Ladeluftleitung 1 anzuordnen, so daß die beiden Leitungen eine gemeinsame Trennwand aufweisen. Die Ladeluftleitung 1 weist weiterhin Ladeluftanschlüsse 13 auf, die mit Anschlußstutzen 14 zu den Einlaßkanälen der Zylinderköpfe 6 zusammenwirken. Diese Anschlußstutzen 14 liegen unter Einfügung einer elastischen Dichtung 15 ohne weitere Verschraubung auf den Ladeluftanschlüssen 13 auf.The cylinder tube 7 can be cooled by cooling water in the area surrounded by the intermediate housing 5, the cooling water being passed on from the intermediate housing into the cylinder head 6, which is also to be cooled. From the cylinder head 6, the cooling water is conducted at the highest point through a pipe section 11 into a cooling water line 10 arranged above the charge air line 1. By doing Exemplary embodiment according to FIG. 1, the cooling water line 10 is arranged in one piece on the charge air line 1 via spacing feet 12. According to an embodiment, not shown, it is also provided to arrange the cooling water line 10 directly on the charge air line 1 with the omission of the feet 12, so that the two lines have a common partition. The charge air line 1 also has charge air connections 13 which cooperate with connecting pieces 14 to the inlet channels of the cylinder heads 6. These connecting pieces 14 lie on the charge air connections 13 without an additional screw connection, with the insertion of an elastic seal 15.
An die Ladeluftleitung 1 ist weiterhin eine Wanne 16 angeformt, die an geodätisch niedrigster Stelle der Ladeluftleitung 1 angeordnet ist. Die Wanne 16 weist eine im wesentlichen trapezförmige Gestalt auf, wobei sie an ihrer geodätisch niedrigsten Stelle den kürzeren Trapezschenkel aufweist. Die Wanne 16 fängt das in der Ladeluftleitung 1 ausgeschiedende Öl, das sich an den Wänden absetzt, auf. Dieses aufgefangene Öl kann dann in geeigneter Form abgeführt werden. In der Figur 1 ist zu erkennen, daß die Wannenfläche die Querschnittsfläche der Ladeluftleitung 1 nicht beeinflußt, insbesondere nicht verkleinert, so daß eine Strömungs- beeinflußung der Ladeluft durch beispielsweise eine Querschnitts¬ verengung weitgehend ausgeschlossen ist.A trough 16 is also formed on the charge air line 1 and is arranged at the geodetically lowest point of the charge air line 1. The trough 16 has an essentially trapezoidal shape, with the shorter trapezoidal leg at its geodetically lowest point. The trough 16 collects the oil which is discharged in the charge air line 1 and is deposited on the walls. This collected oil can then be removed in a suitable form. It can be seen in FIG. 1 that the trough surface does not influence, in particular does not reduce, the cross-sectional area of the charge air line 1, so that the flow of the charge air, for example by narrowing the cross section, is largely excluded.
An den stirnseitigen Enden weist die Wanne Schottwände 17 auf, die der Kontur der rohrförmigen Ladeluftleitung entsprechen, das heißt, die Schottwände 17 weisen zu der Ladeluftleitung 1 eine kreisbogenförmige Ausbildung auf.At the front ends, the trough has bulkheads 17 which correspond to the contour of the tubular charge air line, that is to say the bulkheads 17 have an arcuate configuration with the charge air line 1.
Die einzelnen Ladeluftleitungsabschnitte 2 gemäß Figur 2 weisen an ihren stirnseitigen Enden Flansche 18a, 18b auf, in die Öffnungen eingelassen sind, durch die die Ladeluftleitungsabschnitte 2 miteinander verschraubbar sind. Ähnliche Flansche sind an der Kühlwasserleitung 10 vorgesehen. Die Wanne 16 weist dagegen an dem stirnseitigen Ende 18b eine von außen zugängliche Einbuchtung 19 auf, die das Einführen von Befestigungsschrauben in in die Schottwand 17 eingelassene Befestigungslöcher ermöglichen. Auf dem gegenüberliegenden stirnseitigen Ende 18a sind in die Schottwand 17 den Befestigungslöchern gegenüberliegende Sacklochgewinde eingelassen. In diese werden die Befestigungsschrauben eingedreht. The individual charge air line sections 2 according to FIG. 2 have flanges 18a, 18b at their front ends, into which openings are inserted, through which the charge air line sections 2 can be screwed together. Similar flanges are provided on the cooling water line 10. The tub 16, however, has at the front end 18b an externally accessible indentation 19, which the insertion of fastening screws into the Bulkhead allow 17 recessed mounting holes. On the opposite front end 18a, blind hole threads opposite the fastening holes are embedded in the bulkhead 17. The fastening screws are screwed into this.

Claims

- 6 -Verbrennungsluftleitung einer BrennkraftmaschineA N S P R Ü C H E - 6 - Combustion air line of an internal combustion engine A NSPR Ü CHE
1. Brennkraftmaschine mit einem Kurbelgehäuse, in dem eine Kurbelwelle drehbar gelagert ist, an der zumindest ein Pleuel angelenkt ist, das einen Kolben trägt, der in einem von einem Zylinderkopf abgedeckten Zylinderrohr bewegbar ist, wobei in den Zylinderkopf eingelassene Gaswechselventile mit einer Abgasleitung und einer Verbrennungsluftleitung verbunden sind, dadurch gekennzeichnet, daß die Verbrennungsluftleitung an geodätisch niedrigster Stelle eine Ölfangeinrichtung aufweist, die als Wanne (16) ausgebildet ist.1. Internal combustion engine with a crankcase, in which a crankshaft is rotatably mounted, on which at least one connecting rod is articulated, which carries a piston which is movable in a cylinder tube covered by a cylinder head, with gas exchange valves embedded in the cylinder head having an exhaust pipe and a Combustion air line are connected, characterized in that the combustion air line has an oil trap at the geodetically lowest point, which is designed as a trough (16).
2. Brennkraftmaschine nach Anspruch 1 , dadurch gekennzeichnet, daß die Wanne (16) einstückig mit der Ver¬ brennungsluftleitung gefertigt ist und daß die Querschnittsfläche der Wanne (16) eine Zusatzfläche zu der Querschnittsfläche der Ver- brennungsluftleitung bildet.2. Internal combustion engine according to claim 1, characterized in that the trough (16) is made in one piece with the Ver¬ combustion air line and that the cross-sectional area of the trough (16) forms an additional surface to the cross-sectional area of the combustion air line.
3. Brennkraftmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Verbrennungsluftleitung eine Ladeluftleitung (1 ) ist und daß die Ladeluftleitung (1 ) aus Ladeluftlei- tungsabschnitten (2) zusammensetzbar ist.3. Internal combustion engine according to claim 1 or 2, characterized in that the combustion air line is a charge air line (1) and that the charge air line (1) from the charge air line sections (2) can be assembled.
4. Brennkraftmaschine nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Wanne (16) aus Wannenabschnitten entsprechend den Ladeluftleitungsabschnitten (2) zusammengesetzt ist. 4. Internal combustion engine according to one of the preceding claims, characterized in that the trough (16) is composed of trough sections corresponding to the charge air line sections (2).
5. Brennkraftmaschine nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Wannenabschnitte an ihren längsseitigen Ende Schottwände (17) aufweisen, die der Kontur der rohrförmigen Ladeluftleitung entsprechen.5. Internal combustion engine according to one of the preceding claims, characterized in that the trough sections have at their longitudinal end bulkheads (17) which correspond to the contour of the tubular charge air line.
6. Brennkraftmaschine nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß an der Ladeluftleitung (1 ) an geodätisch höchster Stelle eine Kühlwasserleitung (10) einstückig angeformt ist.6. Internal combustion engine according to one of the preceding claims, characterized in that a cooling water line (10) is integrally formed on the charge air line (1) at the geodetically highest point.
7. Brennkraftmaschine nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Kühlwasserleitung (10) direkt an die Ladeluftleitung (1 ) anschließt und beide eine gemeinsame Trennwand aufweisen.7. Internal combustion engine according to one of the preceding claims, characterized in that the cooling water line (10) connects directly to the charge air line (1) and both have a common partition.
8. Brennkraftmaschine nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Ladeluftleitung (1 ) und die Kühlwasserleitung (10) außenliegende Befestigungsflansche (18a, 18b) aufweisen.8. Internal combustion engine according to one of the preceding claims, characterized in that the charge air line (1) and the cooling water line (10) have external fastening flanges (18a, 18b).
9. Brennkraftmaschine nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Wanne (16) an einem stirnseitigen Ende von außen zugängliche Einbuchtungen (19) aufweist, die das Einführen von Befestigungsschrauben in in die Schottwand (17) eingelassene Befestigungslöcher ermöglichen, und daß in dem gegenüberliegenden stirnseitigen Ende in die Schottwand (17) den Befestigungslöchern zugeordnete Sacklochgewinde eingelassen sind. 9. Internal combustion engine according to one of the preceding claims, characterized in that the trough (16) has at one end face from the outside accessible recesses (19) which allow the insertion of fastening screws into the bulkhead (17) recessed mounting holes, and that in blind hole threads assigned to the fastening holes are let into the opposite front end in the bulkhead wall (17).
EP95933384A 1994-09-19 1995-09-18 Combustion air duct of an internal combustion engine Expired - Lifetime EP0782667B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4433285A DE4433285A1 (en) 1994-09-19 1994-09-19 Combustion air line of an internal combustion engine
DE4433285 1994-09-19
PCT/EP1995/003661 WO1996009469A1 (en) 1994-09-19 1995-09-18 Combustion air duct of an internal combustion engine

Publications (2)

Publication Number Publication Date
EP0782667A1 true EP0782667A1 (en) 1997-07-09
EP0782667B1 EP0782667B1 (en) 1998-07-15

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EP95933384A Expired - Lifetime EP0782667B1 (en) 1994-09-19 1995-09-18 Combustion air duct of an internal combustion engine

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AT (1) ATE168449T1 (en)
DE (2) DE4433285A1 (en)
DK (1) DK0782667T3 (en)
FI (1) FI107754B (en)
WO (1) WO1996009469A1 (en)

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DE102011102248B4 (en) * 2011-05-23 2021-12-23 Audi Ag Internal combustion engine
JP6552096B2 (en) 2015-08-06 2019-07-31 三菱重工エンジン＆ターボチャージャ株式会社 engine

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ATE168449T1 (en) 1998-08-15
WO1996009469A1 (en) 1996-03-28
FI971135A0 (en) 1997-03-18
FI971135A (en) 1997-03-18
DK0782667T3 (en) 1999-03-01
DE59502847D1 (en) 1998-08-20
EP0782667B1 (en) 1998-07-15
FI107754B (en) 2001-09-28
DE4433285A1 (en) 1996-03-21

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