EP0489238A2 - Inlet collector - Google Patents

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Publication number
EP0489238A2
EP0489238A2 EP91116688A EP91116688A EP0489238A2 EP 0489238 A2 EP0489238 A2 EP 0489238A2 EP 91116688 A EP91116688 A EP 91116688A EP 91116688 A EP91116688 A EP 91116688A EP 0489238 A2 EP0489238 A2 EP 0489238A2
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EP
European Patent Office
Prior art keywords
intake
intake manifold
gases
connecting flange
pipes
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Granted
Application number
EP91116688A
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German (de)
French (fr)
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EP0489238B1 (en
EP0489238A3 (en
EP0489238B2 (en
Inventor
Eduard Kopec
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Mann and Hummel GmbH
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Filterwerk Mann and Hummel GmbH
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    • 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
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10078—Connections of intake systems to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M35/108—Intake manifolds with primary and secondary intake passages
    • F02M35/1085—Intake manifolds with primary and secondary intake passages the combustion chamber having multiple intake valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Definitions

  • the invention relates to an intake manifold for an internal combustion engine made of plastic according to the preamble of the main claim.
  • an intake manifold for an internal combustion engine is known, which is made in one piece from plastic.
  • This suction manifold shows that it is possible to form both the connecting flange and the individual pipe pieces, which end in a common tubular extension, in one piece using plastic and to produce them in one operation.
  • the manufacturing process of such an intake manifold is, however, quite complex, so that previously particularly complicated shapes had to be dispensed with.
  • EP-PS 251 159 describes the use of a separate tube which is placed in the intake box and has openings which are arranged such that each cylinder is supplied with a certain amount of blow-by gases.
  • the invention has for its object to provide a suction pipe in a simple manner and without additional structural elements, which is designed such that air and / or blow-through gases are fed evenly to the individual intake pipes of the internal combustion engine. This problem is solved on the basis of the preamble of the subordinate main claims by their characteristic features.
  • the main idea of the invention is to design the supply of air or gas without machining the cylinder head or the engine block in such a way that they are introduced into the intake tract as close as possible to the valves. This also prevents any condensed water that may be introduced from icing up the intake tract. It is also achieved by the invention that no elements are required on the intake manifold, which unnecessarily complicate or make the manufacturing process of such an intake manifold unnecessarily.
  • An alternative solution to the task provides for a longitudinal bore to be arranged in the connecting flange of the intake manifold, from which transverse bores branch off into the regions of the individual intake openings.
  • a longitudinal bore is much easier to produce than in a cylinder head.
  • Such a longitudinal bore can also be suitable for avoiding material accumulations at certain points, which is usually done by ribbing or by making cavities. In this respect, such a hole can also contribute to the constructively favorable design of the intake manifold.
  • the openings through which the blow-by gas opens into the intake area are arranged in the immediate vicinity of the connection surface of the cylinder head.
  • these openings can be designed as slots that are attached to the connecting surface of the intake pipe. The closure of these slots is then inevitably formed by the connection surface of the cylinder head.
  • the introduction of these slots, in particular into a plastic part, is very easy to manufacture in terms of production technology.
  • the cross bores can have different diameters in order to achieve certain throttle cross sections which are suitable for ensuring that the blow-by gases are distributed evenly into the individual cylinders or to the individual valves. This means that the transverse bore first reached by the blow-by gas has the smallest diameter and these diameters increase in the direction of flow.
  • the adjacent intake pipes can be provided with a single connection for the blow-by gases, this connection opening into a slot which extends between the two pipe sections.
  • Another application of the longitudinal bore in the intake manifold is to use this bore to supply clean air, which is taken from the clean air flow of the air filter, to the valve seats of the injection valves.
  • These injection valves which are fastened directly above, in the area of the respective intake pipes in valve bores, require additional air in idle mode, which enables the fuel quantity injected to be better processed. This additional air is advantageously supplied to the individual valves via the longitudinal bore and the transverse bores branching off from it.
  • FIG. 1 shows the front part of an intake manifold 10 for an internal combustion engine with the individual intake pipes 11-18.
  • the intake manifold 10 is designed for an internal combustion engine which has four cylinders and two intake valves are provided per cylinder.
  • the intake manifold 10 is therefore divided into eight individual intake pipes 11-18.
  • the intake pipes are combined at their front end with a connecting flange 19.
  • This connecting flange is by means of screws or the like attached to a cylinder head 20 shown only hinted here.
  • connection bores in which connection elements 20, 21, 22 are fastened.
  • connection elements 23, 24 are fastened.
  • Each connection bore opens into a slot 25, 26, 27, 28, 29. This slot extends in each case between the two adjacent intake pipes and thus represents a passage through the respective connection element to the corresponding intake opening.
  • the blow-by gases which collect in the crankcase and must be returned to the intake tract, reach the connection elements 20-24 via a line (not shown here).
  • This line can consist, for example, of several hoses which are plugged onto the connection elements.
  • the surface of the cylinder head 30 facing the intake manifold forms a natural boundary of the slots 25-29.
  • the external intake pipes 11, 28 are each individually supplied with the blow-by gases via a connecting element 23, 24, so that it is ensured that the external ones Valves are provided with the same amount of blow-by gases as the internal valves.
  • Figure 1b shows the top view of the connecting flange.
  • the connecting flange 19 is further provided with two rows of bores 31, 32 for fastening the flange to the cylinder head.
  • the connection elements 20-24 are inserted into the corresponding bores and fastened in this bore, for example via a snap connection.
  • connecting flange 19 to be designed in such a way that the connection elements are superfluous, ie to provide this connection flange itself with fastening sockets onto which the hoses can be attached.
  • Figure 2 shows a variant of an intake manifold 10. This also has a connecting flange 19.
  • a longitudinal bore 33 is arranged in this connecting flange 19.
  • Cross bores 34 - 41 extend from this longitudinal bore 33.
  • the transverse bores each open into an intake pipe 11-18.
  • the longitudinal bore 33 is open on one side and is provided there with a connecting element 42, onto which a hose supplying the blow-by gases is attached.
  • the longitudinal bore 33 is located in the illustration shown here approximately in the middle of the connecting flange. Instead of such a bore, there is also the possibility of providing a longitudinal slot directly on the end face of the connecting flange 19 facing the cylinder head 30.
  • Cross slots extend from this longitudinal slot, which extend to the respective intake pipe. The production of such slots in a plastic molding is very simple, since no slides are required in an injection molding tool.
  • the intake manifold 10 shown in FIG. 3 contains the intake pipes 11, 12, 13, 14. Above the intake pipes, valve seats 43, 44, 45, 46 for injection valves are arranged. These injectors have to be flushed with clean air in idle mode, this clean air being supplied to the fuel via holes in the valves and causing a better swirling of the fuel.
  • a longitudinal bore 33 is shown in the intake manifold. This is provided with a connecting element 42.
  • the transverse bores 34, 35, 36, 37 extend from the longitudinal bore 33 and each lead to the inner wall of one of the valve seats 43 to 46. the longitudinal bore 33 is replaced by longitudinal slot 52.
  • valve 47 is shown in the valve seat 43.
  • This valve 47 is held in the valve seat via O-rings 48, 49 and has air inflow openings 50 on its circumference.
  • the longitudinal slot is closed by a cover element 51.
  • the slot 52 is also the possibility of designing the slot 52 as a longitudinal bore, as shown in FIG. 2.

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  • 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)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The invention proposes an inlet collector for an internal combustion engine. This inlet collector 10 contains a connection flange 19 into which a plurality of intake pipes 11 - 18 open. Situated between the intake pipes are bores which are provided with connection elements 20 - 24 and through which blow-by gases coming from the crankcase are fed in. The bores are each connected via slots to the two adjacent intake pipes, with the result that the blow-by gases are passed into the intake tract in the immediate vicinity of the entry of the intake air into the cylinder head. …<??>The advantages of the invention are a simple structure for feeding the blow-by gases into the intake tract and the guaranteeing of uniform charging of the individual intake pipes with blow-by gases, which, because of the small quantity of oil contained in them, lubricate the intake valves. …<IMAGE>…

Description

Die Erfindung betrifft einen Ansaugverteiler für eine Brennkraftmaschine aus Kunststoff nach dem Oberbegriff des Hauptanspruchs. Aus der DE-PS 28 22 409 ist ein Ansaugverteiler für eine Brennkraftmaschine bekannt, welcher einstückig aus Kunststoff hergestellt ist. Dieser Ansaugverteiler zeigt, daß es möglich ist, sowohl den Anschlußflansch als auch die einzelnen Rohrstücke, die in einem gemeinsamen rohrförmigen Ansatz enden, unter Verwendung von Kunststoff einstückig auszubilden und in einem Arbeitsgang herzustellen. Das Herstellungsverfahren eines solchen Ansaugverteilers ist jedoch recht aufwendig, so daß bisher auf besonders komplizierte Formen verzichtet werden mußte.The invention relates to an intake manifold for an internal combustion engine made of plastic according to the preamble of the main claim. From DE-PS 28 22 409 an intake manifold for an internal combustion engine is known, which is made in one piece from plastic. This suction manifold shows that it is possible to form both the connecting flange and the individual pipe pieces, which end in a common tubular extension, in one piece using plastic and to produce them in one operation. The manufacturing process of such an intake manifold is, however, quite complex, so that previously particularly complicated shapes had to be dispensed with.

Aus der EP-PS 251 159 ist es bekannt, Leckgase bzw. Durchblasgase, welche sich in dem Kurbelgehäuse einer Brennkraftmaschine sammeln, in die Ansaugrohre der Zylinder zurückzuführen. Diese Durchblasgase entstehen dadurch, daß die Kolbenringe keine hundertprozentige Abdichtung zwischen Zylinder und Kurbelgehäuse herstellen können. Deshalb gelangen die teils aus unverbranntem Luft-Kraftstoffgemisch, teils aus Verbrennungsgasen bestehenden Durchblasgase ins Kurbelgehäuse und müssen von dort in die Ansaugleitung rückgeführt werden. Diese Rückführung hat, wie allgemein bekannt, den positiven Nebeneffekt, daß damit auch geringe Mengen von Öldunst mitgeführt werden. Dieses Öl führt zu einer Schmierung der Ventilsitze, so daß es zweckmäßig ist, die Durchblasgase nicht einem einzelnen Zylinder zuzuführen, sondern möglichst über alle Zylinder gleichmäßig verteilt in den Ansaugtrakt einzubringen.From EP-PS 251 159 it is known to leak gases or blow-by gases, which collect in the crankcase of an internal combustion engine, back into the intake pipes of the cylinders. These blow-by gases arise because the Piston rings cannot produce a 100% seal between the cylinder and crankcase. For this reason, the blow-by gases consisting partly of an unburned air-fuel mixture and partly consisting of combustion gases enter the crankcase and have to be returned from there to the intake pipe. As is generally known, this recirculation has the positive side effect that it also carries small amounts of oil vapor with it. This oil leads to lubrication of the valve seats, so that it is expedient not to supply the blow-by gases to a single cylinder, but rather to introduce them into the intake tract evenly distributed over all cylinders.

Hierzu beschreibt die EP-PS 251 159 die Anwendung eines separaten Rohres, welches in den Ansaugkasten gesetzt ist und Öffnungen aufweist, die so angeordnet sind, daß jeder Zylinder mit einer bestimmten Menge an Durchblasgasen versorgt wird.For this purpose, EP-PS 251 159 describes the use of a separate tube which is placed in the intake box and has openings which are arranged such that each cylinder is supplied with a certain amount of blow-by gases.

Dieses zusätzliche Rohr muß jedoch in den Ansaugkasten eingesetzt werden und wird dort über geeignete Befestigungselemente mit dem Ansaugkasten verbunden. Eine weitere Variante, die in dem genannten Stand der Technik beschrieben ist, sieht vor, die Rückführleitung direkt in den Zylinderkopf zu integrieren. Hierzu ist jedoch eine zusätzliche und sehr aufwendige Bearbeitung des Zylinderkopfes notwendig. Eine solche Integration bedeutet, daß der Zylinderkopf eine Bohrung entlang seiner Längsachse aufweisen muß, die aufgrund ihrer Länge und des geringen Durchmessers sehr schwer herzustellen ist.However, this additional pipe must be inserted into the intake box and is connected to the intake box by suitable fastening elements. Another variant, which is described in the cited prior art, provides for the return line to be integrated directly into the cylinder head. However, this requires additional and very complex machining of the cylinder head. Such integration means that the cylinder head must have a bore along its longitudinal axis, which is very difficult to manufacture due to its length and small diameter.

Es ist weiterhin aus der japanischen Patent-Offenlegung 2-37104 eine Vorrichtung zum Zuführen von Durchblasgas an einen Luftansaugverteiler bekannt, bei dem in der Mitte zwischen nebeneinanderliegenden Luftansaugverteilern zwei miteinander kommunizierende Wege vorgesehen sind, deren jeweils eines Ende an den inneren Umfang eines Luftansaugverteilers grenzt und das andere Ende in eine offene Kammer führt, in welche die Durchblasgase eingeleitet werden. Bei dieser Anordnung besteht jedoch der Nachteil, daß eine Vielzahl von Anschlüssen für die Einleitung der Durchblasgase erforderlich sind, die damit die Störanfälligkeit des Systems erhöhen.It is further known from Japanese Patent Laid-Open 2-37104, a device for supplying blow-by gas to an air intake manifold, in which two are located in the middle between adjacent air intake manifolds communicating paths are provided, one end of which adjoins the inner circumference of an air intake manifold and the other end leads into an open chamber into which the blow-by gases are introduced. With this arrangement, however, there is the disadvantage that a large number of connections are required for the introduction of the blow-by gases, which thus increase the susceptibility to faults of the system.

Der Erfindung liegt die Aufgabe zugrunde, in einfacher Art und Weise und ohne zusätzliche konstruktive Elemente ein Ansaugrohr zu schaffen, welches derart ausgestaltet ist, daß Luft und/oder Durchblasgase gleichmäßig den einzelnen Ansaugrohren der Brennkraftmaschine zugeführt werden. Diese Aufgabe wird ausgehend von dem Oberbegriff der nebengeordneten Hauptansprüche durch deren kennzeichnende Merkmale gelöst.The invention has for its object to provide a suction pipe in a simple manner and without additional structural elements, which is designed such that air and / or blow-through gases are fed evenly to the individual intake pipes of the internal combustion engine. This problem is solved on the basis of the preamble of the subordinate main claims by their characteristic features.

Der Kerngedanke der Erfindung liegt darin, ohne Bearbeitung des Zylinderkopfs bzw. des Motorblocks die Zuführung von Luft oder Gas so zu gestalten, daß diese möglichst nahe an den Ventilen in den Ansaugtrakt eingeleitet werden. Dadurch wird auch vermieden, daß evtl. eingeleitetes Kondenswasser zu einer Vereisung des Ansaugtraktes führt. Außerdem wird durch die Erfindung erreicht, daß auch am Ansaugverteiler keine Elemente erforderlich sind, die den Herstellungsprozess eines solchen Ansaugverteilers unnötig erschweren bzw. verteuern.The main idea of the invention is to design the supply of air or gas without machining the cylinder head or the engine block in such a way that they are introduced into the intake tract as close as possible to the valves. This also prevents any condensed water that may be introduced from icing up the intake tract. It is also achieved by the invention that no elements are required on the intake manifold, which unnecessarily complicate or make the manufacturing process of such an intake manifold unnecessarily.

Eine alternative Lösung der gestellten Aufgabe sieht vor, im Anschlußflansch des Ansaugverteilers eine Längsbohrung anzuordnen, von der Querbohrungen in die Bereiche der einzelnen Ansaugöffnungen abzweigen. Bei einem Ansaugverteiler ist eine solche Längsbohrung wesentlich einfacher herzustellen als in einem Zylinderkopf. Eine solche Längsbohrung kann auch geeignet sein, Materialanhäufungen an bestimmten Stellen zu vermeiden, was üblicherweise durch Verrippung oder durch das Anbringen von Hohlräumen geschieht. Insofern kann eine solche Bohrung auch zur konstruktiv günstigen Gestaltung des Ansaugverteilers beitragen.An alternative solution to the task provides for a longitudinal bore to be arranged in the connecting flange of the intake manifold, from which transverse bores branch off into the regions of the individual intake openings. In the case of an intake manifold, such a longitudinal bore is much easier to produce than in a cylinder head. Such a longitudinal bore can also be suitable for avoiding material accumulations at certain points, which is usually done by ribbing or by making cavities. In this respect, such a hole can also contribute to the constructively favorable design of the intake manifold.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, die Öffnungen, durch welche das Durchblasgas in den Ansaugbereich münden, in unmittelbarer Nähe der Anschlußfläche des Zylinderkopfes anzuordnen. Konstruktiv können diese Öffnungen als Schlitze ausgeführt werden, die an der Anschlußfläche des Ansaugrohres angebracht sind. Der Abschluß dieser Schlitze wird dann zwangsläufig durch die Anschlußfläche des Zylinderkopfes gebildet. Die Einbringung dieser Schlitze, insbesondere in ein Kunststoffteil, ist fertigungstechnisch sehr einfach herzustellen.According to an advantageous embodiment of the invention, the openings through which the blow-by gas opens into the intake area are arranged in the immediate vicinity of the connection surface of the cylinder head. Structurally, these openings can be designed as slots that are attached to the connecting surface of the intake pipe. The closure of these slots is then inevitably formed by the connection surface of the cylinder head. The introduction of these slots, in particular into a plastic part, is very easy to manufacture in terms of production technology.

Wird das Ansaugrohr gemäß der alternativen Variante mit einer Längsbohrung versehen, so können gemäß einer weiteren vorteilhaften Ausgestaltung die Querbohrungen unterschiedliche Durchmesser aufweisen, um so bestimmte Drosselquerschnitte zu erzielen, die dazu geeignet sind, daß eine gleichmäßige Verteilung der Durchblasgase in die einzelnen Zylinder bzw. zu den einzelnen Ventilen erfolgt. Dies bedeutet, daß die von dem Durchblasgas zuerst erreichte Querbohrung den kleinsten Durchmesser aufweist und diese Durchmesser in Strömungsrichtung zunehmen.If the intake pipe is provided with a longitudinal bore according to the alternative variant, then according to a further advantageous embodiment, the cross bores can have different diameters in order to achieve certain throttle cross sections which are suitable for ensuring that the blow-by gases are distributed evenly into the individual cylinders or to the individual valves. This means that the transverse bore first reached by the blow-by gas has the smallest diameter and these diameters increase in the direction of flow.

Bei einer Brennkraftmaschine, die zwei Einlaßventile pro Zylinder aufweist, sind auch zwei Ansaugrohre pro Zylinder erforderlich. Gemäß einer Weiterbildung der Erfindung können dabei die benachbart liegenden Ansaugrohre mit einem einzigen Anschluß für die Durchblasgase versehen sein, wobei dieser Anschluß in einen Schlitz mündet, der sich zwischen die beiden Rohrstücke erstreckt.In an internal combustion engine that has two intake valves per cylinder, two intake pipes per cylinder are also required. According to a development of the invention, the adjacent intake pipes can be provided with a single connection for the blow-by gases, this connection opening into a slot which extends between the two pipe sections.

Eine weitere Anwendung der Längsbohrung in dem Ansaugverteiler besteht darin, mittels dieser Bohrung Reinluft, die vom Reinluftstrom des Luftfilters entnommen wird, an die Ventilsitze der Einspritzventile zuzuführen. Diese Einspritzventile, die unmittelbar oberhalb, im Bereich der jeweiligen Ansaugrohre in Ventilbohrungen befestigt sind, benötiger im Leerlaufbetrieb Zusatzluft, welche eine bessere Verwirbeiung der eingespritzten Kraftstoffmenge ermöglicht. Diese Zusatzluft wird in vorteilhafter Weise über die Längsbohrung und die daran abzweigenden Querbohrungen an die einzelnen Ventile zugeführt.Another application of the longitudinal bore in the intake manifold is to use this bore to supply clean air, which is taken from the clean air flow of the air filter, to the valve seats of the injection valves. These injection valves, which are fastened directly above, in the area of the respective intake pipes in valve bores, require additional air in idle mode, which enables the fuel quantity injected to be better processed. This additional air is advantageously supplied to the individual valves via the longitudinal bore and the transverse bores branching off from it.

Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen näher erläutert. Es zeigt:

Figur 1
eine Schnitt- und eine Draufsichtdarstellung auf den Ansaugverteiler einer Brennkraftmaschine
Figur 2
eine Schnittdarstellung durch eine weitere Variante eines Ansaugverteilers für eine Brennkraftmaschine.
Figur 3
eine Draufsichtdarstellung auf einen Ansaugverteiler mit Ventilsitzen
Figur 4
eine Schnittdarstellung durch den in Figur 3 gezeigten Ansaugverteiler
The invention is explained in more detail below on the basis of exemplary embodiments. It shows:
Figure 1
a sectional and a plan view of the intake manifold of an internal combustion engine
Figure 2
a sectional view through a further variant of an intake manifold for an internal combustion engine.
Figure 3
a plan view of an intake manifold with valve seats
Figure 4
a sectional view through the intake manifold shown in Figure 3

Die Figur 1 zeigt den vorderen Teil eines Ansaugverteilers 10 für eine Brennkraftmaschine mit den einzelnen Ansaugrohren 11 - 18. Der Ansaugverteiler 10 ist für eine Brennkraftmaschine konzipiert, die vier Zylinder aufweist und pro Zylinder zwei Einlaßventile vorgesehen sind. Der Ansaugverteiler 10 teilt sich deshalb in acht einzelne Ansaugrohre 11 - 18 auf. Die Ansaugrohre sind an ihrem vorderen Ende mit einem Anschlußflansch 19 zusammgefaßt. Dieser Anschlußflansch wird mittels Schrauben o.ä. an einem hier nur andeutungsweise dargestellten Zylinderkopf 20 befestigt. Zwischen den beiden Ansaugrohrpaaren eines Zylinders befinden sich Anschlußbohrungen, in denen Anschlußelemente 20, 21, 22 befestigt sind. Ferner befinden sich außerhalb der äußeren Ansaugrohre 18 ebenfalls zwei Bohrungen, in denen zwei weitere Anschlußelemente 23, 24 befestigt sind. Jede Anschlußbohrung mündet in einen Schlitz 25, 26, 27, 28, 29. Dieser Schlitz erstreckt sich jeweils zwischen die beiden benachbart angeordneten Ansaugrohre und stellt somit einen Durchgang über das jeweilige Anschlußelement an die entsprechende Ansaugöffnung dar.1 shows the front part of an intake manifold 10 for an internal combustion engine with the individual intake pipes 11-18. The intake manifold 10 is designed for an internal combustion engine which has four cylinders and two intake valves are provided per cylinder. The intake manifold 10 is therefore divided into eight individual intake pipes 11-18. The intake pipes are combined at their front end with a connecting flange 19. This connecting flange is by means of screws or the like attached to a cylinder head 20 shown only hinted here. Between the two pairs of intake pipes of a cylinder there are connection bores in which connection elements 20, 21, 22 are fastened. Furthermore, there are also two bores outside the outer intake pipes 18, in which two further connection elements 23, 24 are fastened. Each connection bore opens into a slot 25, 26, 27, 28, 29. This slot extends in each case between the two adjacent intake pipes and thus represents a passage through the respective connection element to the corresponding intake opening.

Die Durchblasgase, die sich im Kurbelgehäuse sammeln und in den Ansaugtrakt zurückgeführt werden müssen, gelangen über eine hier nicht dargestellte Leitung zu den Anschlußelementen 20 - 24. Diese Leitung kann beispielsweise aus mehreren Schläuchen bestehen, die auf die Anschlußelemente aufgesteckt sind. Dabei bildet die dem Ansaugverteiler zugewandte Fläche des Zylinderkopfes 30 eine natürliche Begrenzung der Schlitze 25 - 29. Die außen liegenden Ansaugrohre 11, 28 werden jeweils einzeln über ein Anschlußelement 23, 24 mit den Durchblasgasen versorgt, so daß gewährleistet ist, daß auch die außen liegenden Ventile die gleiche Menge an Durchblasgasen zur Verfügung gestellt bekommen wie die innen liegenden Ventile.The blow-by gases, which collect in the crankcase and must be returned to the intake tract, reach the connection elements 20-24 via a line (not shown here). This line can consist, for example, of several hoses which are plugged onto the connection elements. The surface of the cylinder head 30 facing the intake manifold forms a natural boundary of the slots 25-29. The external intake pipes 11, 28 are each individually supplied with the blow-by gases via a connecting element 23, 24, so that it is ensured that the external ones Valves are provided with the same amount of blow-by gases as the internal valves.

Figur 1b zeigt die Draufsicht auf den Anschlußflansch. In dieser Draufsicht sind die Öffnungen der Ansaugrohre 11 - 18 zu erkennen, ebenso die Schlitze 25 - 29 mit den Anschlußelementen 20 - 24. Der Anschlußflansch 19 ist ferner mit zwei Reihen Bohrungen 31, 32 versehen zum Befestigen des Flansches an dem Zylinderkopf. Die Anschlußelemente 20 - 24 sind in die entsprechenden Bohrungen eingesteckt und beispielsweise über eine Rastverbindung in dieser Bohrung befestigt. Es besteht selbstverständlich auch die Möglichkeit, den Anschlußflansch 19 so zu gestalten, daß die Anschlußelemente überflüssig sind, d.h. diesen Anschlußflansch selbst mit Befestigungsstutzen zu versehen, auf welche die Schläuche aufgesteckt werden können.Figure 1b shows the top view of the connecting flange. In this plan view, the openings of the intake pipes 11-18 can be seen, as can the slots 25-29 with the connecting elements 20-24. The connecting flange 19 is further provided with two rows of bores 31, 32 for fastening the flange to the cylinder head. The connection elements 20-24 are inserted into the corresponding bores and fastened in this bore, for example via a snap connection. Of course, there is also the possibility of connecting flange 19 to be designed in such a way that the connection elements are superfluous, ie to provide this connection flange itself with fastening sockets onto which the hoses can be attached.

Figur 2 zeigt eine Variante eines Ansaugverteilers 10. Dieser weist ebenfalls einen Anschlußflansch 19 auf. In diesem Anschlußflansch 19 ist eine Längsbohrung 33 angeordnet. Von dieser Längsbsohrung 33 gehen Querbohrungen 34 - 41 aus. Die Querbohrungen münden in jeweils ein Ansaugrohr 11 - 18. Die Längsbohrung 33 ist an einer Seite offen und dort mit einem Anschlußelement 42 versehen, auf welches ein die Durchblasgase zuführender Schlauch aufgesteckt wird. Die Längsbohrung 33 befindet sind in der hier gezeigten Darstellung etwa in der Mitte des Anschlußflansches. Es besteht auch die Möglichkeit anstelle einer solchen Bohrung direkt an der dem Zylinderkopf 30 zugewandten Stirnseite des Anschlußflansches 19 einen Längsschlitz vorzusehen. Von diesem Längsschlitz gehen Querschlitze aus, die bis an das jeweilige Ansaugrohr heranreichen. Die Herstellung solcher Schlitze in einem Kunststofformteil ist sehr einfach, da hierzu keine Schieber in einem Spritzgußwerkzeug benötigt werden.Figure 2 shows a variant of an intake manifold 10. This also has a connecting flange 19. A longitudinal bore 33 is arranged in this connecting flange 19. Cross bores 34 - 41 extend from this longitudinal bore 33. The transverse bores each open into an intake pipe 11-18. The longitudinal bore 33 is open on one side and is provided there with a connecting element 42, onto which a hose supplying the blow-by gases is attached. The longitudinal bore 33 is located in the illustration shown here approximately in the middle of the connecting flange. Instead of such a bore, there is also the possibility of providing a longitudinal slot directly on the end face of the connecting flange 19 facing the cylinder head 30. Cross slots extend from this longitudinal slot, which extend to the respective intake pipe. The production of such slots in a plastic molding is very simple, since no slides are required in an injection molding tool.

Der in Figur 3 gezeigte Ansaugverteiler 10 enthält die Ansaugrohre 11, 12, 13, 14. Oberhalb der Ansaugrohre sind Ventilsitze 43, 44, 45, 46 für Einspritzventile angeordnet. Diese Einspritzventile müssen im Leerlaufbetrieb von Reinluft umspült werden, wobei diese Reinluft über Bohrungen an den Ventilen dem Brennstoff zugeführt wird und eine bessere Verwirbelung des Brennstoffs bewirkt. In dem Ansaugverteiler ist eine Längsbohrung 33 dargestellt. Diese ist mit einem Anschlußelement 42 versehen. Von der Längsbohrung 33 gehen die Querbohrungen 34, 35, 36, 37 aus, die jeweils an die Innenwandung eines der Ventilsitze 43 bis 46 führen. wird die Längsbohrung 33 durch Längsschlitz 52 ersetzt.The intake manifold 10 shown in FIG. 3 contains the intake pipes 11, 12, 13, 14. Above the intake pipes, valve seats 43, 44, 45, 46 for injection valves are arranged. These injectors have to be flushed with clean air in idle mode, this clean air being supplied to the fuel via holes in the valves and causing a better swirling of the fuel. A longitudinal bore 33 is shown in the intake manifold. This is provided with a connecting element 42. The transverse bores 34, 35, 36, 37 extend from the longitudinal bore 33 and each lead to the inner wall of one of the valve seats 43 to 46. the longitudinal bore 33 is replaced by longitudinal slot 52.

In der in Figur 4 gezeigten Schnittdarstellung ist ein Ventil 47 in dem Ventilsitz 43 dargestellt. Dieses Ventil 47 wird über O-Ringe 48, 49 in dem Ventilsitz gehalten und besitzt an seinem Umfang Lufteinströmöffnungen 50. Wie aus der Figur ersichtlich ist, wird der Längsschlitz durch ein Deckelelement 51 verschlossen. Selbstverständlich besteht auch die Möglichkeit, den Schlitz 52 als Längsbohrung, wie in Figur 2 gezeigt, auszubilden.In the sectional view shown in Figure 4, a valve 47 is shown in the valve seat 43. This valve 47 is held in the valve seat via O-rings 48, 49 and has air inflow openings 50 on its circumference. As can be seen from the figure, the longitudinal slot is closed by a cover element 51. Of course, there is also the possibility of designing the slot 52 as a longitudinal bore, as shown in FIG. 2.

BezugszeichenlisteReference symbol list

1010th
AnsaugverteilerIntake manifold
1111
AnsaugrohrIntake pipe
1212
AnsaugrohrIntake pipe
1313
AnsaugrohrIntake pipe
1414
AnsaugrohrIntake pipe
1515
AnsaugrohrIntake pipe
1616
AnsaugrohrIntake pipe
1717th
AnsaugrohrIntake pipe
1818th
AnsaugrohrIntake pipe
1919th
AnschlußflanschConnecting flange
2020th
AnschlußelementeConnecting elements
2121
AnschlußelementeConnecting elements
2222
AnschlußelementeConnecting elements
2323
AnschlußelementeConnecting elements
2424th
AnschlußelementeConnecting elements
2525th
Schlitzslot
2626
Schlitzslot
2727th
Schlitzslot
2828
Schlitzslot
2929
Schlitzslot
3030th
ZylinderkopfCylinder head
3131
BohrungenHoles
3232
BohrungenHoles
3333
LängsbohrungLongitudinal bore
3434
QuerbohrungCross hole
3535
QuerbohrungCross hole
3636
QuerbohrungCross hole
3737
QuerbohrungCross hole
3838
QuerbohrungCross hole
3939
QuerbohrungCross hole
4040
QuerbohrungCross hole
4141
QuerbohrungCross hole
4242
AnschlußelementConnecting element
4343
VentilsitzValve seat
4444
VentilsitzValve seat
4545
VentilsitzValve seat
4646
VentilsitzValve seat
4747
VentilValve
4848
O-RingO-ring
4949
O-RingO-ring
5050
LufteinströmöffnungAir inlet opening
5151
DeckelelementCover element
5252
LängsschlitzLongitudinal slot

Claims (9)

Ansaugverteiler für eine Brennkraftmaschine mit einem Anschlußflansch zum Befestigen des Ansaugverteilers am Zylinderkopf und mit an dem Anschlußflansch endende Ansaugrohre, welche eingangsseitig in wenigstens einem gemeinsamen Rohr zusammengefaßt sind, dadurch gekennzeichnet, daß zwischen jeweils zwei benachbart liegenden Ansaugrohren (11 - 18) im Bereich des Anschlußflansches (19) eine die beiden Ansaugrohre verbindende Öffnung vorgesehen ist und diese Öffnung mit einem Anschlußelement (20 - 24) versehen ist, durch welches Gase zugeführt werden.Intake manifold for an internal combustion engine with a connecting flange for fastening the intake manifold to the cylinder head and with intake pipes ending on the connecting flange, which are combined on the input side in at least one common pipe, characterized in that between two adjacent intake pipes (11-18) in the region of the connecting flange (19) an opening connecting the two intake pipes is provided and this opening is provided with a connecting element (20-24) through which gases are supplied. Ansaugverteiler für eine Brennkraftmaschine mit einem Anschlußflansch zum Befestigen des Ansaugverteilers am Zylinderkopf und mit an dem Anschlußflansch endende Ansaugrohre, welche eingangsseitig in wenigstens einem gemeinsamen Rohr zusammengefaßt sind, dadurch gekennzeichnet, daß in dem Anschlußflansch (19) eine Bohrung (33) oder ein Schlitz entlang der Ansaugrohre (11 - 18) verläuft und von dieser Bohrung oder dem Schlitz Querbohrungen oder -Schlitze (34 - 41) ausgehen, die in den Bereich jedes Ansaugrohrs (11 - 18) münden und wobei die Bohrung (33) oder der Schlitz mit einem Anschlußelement (42) versehen ist, durch welches Gase zugeführt werden.Intake manifold for an internal combustion engine with a connecting flange for fastening the intake manifold to the cylinder head and with intake pipes ending at the connecting flange, which are combined on the input side in at least one common pipe, characterized in that a bore (33) or a slot is along in the connecting flange (19) the intake pipes (11-18) and from this hole or slot Cross bores or slots (34 - 41) emanate which open into the area of each intake pipe (11 - 18) and the bore (33) or the slot is provided with a connecting element (42) through which gases are supplied. Ansaugverteiler nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dieser aus Kunststoff, insbesondere aus thermoplastischem Kunststoff besteht.Intake manifold according to claim 1 or 2, characterized in that it consists of plastic, in particular of thermoplastic. Ansaugverteiler nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß über die Anschlußelemente (20 - 24, 42) Durchblasgase aus dem Kurbelgehäuse der Brennkraftmaschine rückgeführt werden.Intake manifold according to one of the preceding claims, characterized in that blow-by gases are returned from the crankcase of the internal combustion engine via the connecting elements (20 - 24, 42). Ansaugverteiler nach Anspruch 2, dadurch gekennzeichnet, daß die Querbohrungen oder Schlitze an die Innenwandung eines Ventilsitzes münden und über diese Querbohrungen oder Schlitze Luft von der Reinluftseite des Luftfilters zu dem Einspritzventil geleitet wird, welches in dem Ventilsitz angeordnet ist.Intake manifold according to claim 2, characterized in that the transverse bores or slots open onto the inner wall of a valve seat and air is conducted via these transverse bores or slots from the clean air side of the air filter to the injection valve which is arranged in the valve seat. Ansaugverteiler nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Öffnungen oder die Querbohrungen (34 - 41) in unmittelbarer Nähe der Anschlußfläche des Zylinderkopfes (30) in das jeweilige Ansaugrohr (11 - 18) münden.Intake manifold according to one of the preceding claims, characterized in that the openings or the transverse bores (34 - 41) open into the respective intake pipe (11 - 18) in the immediate vicinity of the connecting surface of the cylinder head (30). Ansaugverteiler nach Anspruch 2, dadurch gekennzeichnet, daß der Strömungsquerschnitt der Querbohrungen (34 - 41) in Strömungsrichtung der zugeführten Gase zunimmt.Intake manifold according to claim 2, characterized in that the flow cross section of the transverse bores (34-41) increases in the direction of flow of the supplied gases. Ansaugverteiler nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß pro Zylinder zwei Ansaugrohre über den Anschlußflansch (19) in den Zylinderkopf münden und zwischen den benachbart liegenden Ansaugrohren zweier Zylinder die Öffnungen oder Schlitze (34 - 41) vorgesehen sind.Intake manifold according to one of the preceding claims, characterized in that two intake pipes per cylinder open into the cylinder head via the connecting flange (19) and the openings or slots (34 - 41) are provided between the adjacent intake pipes of two cylinders. Ansaugverteiler nach Anspruch 2, dadurch gekennzeichnet, daß der Schlitz entlang der Ansaugrohre (11 - 18) mit einem Deckelelement versehen ist, wobei dieses Deckelelement am Rand des Schlitzes mit diesem verschweißt ist.Intake manifold according to claim 2, characterized in that the slot along the intake pipes (11-18) is provided with a cover element, this cover element being welded to the edge of the slot.
EP91116688A 1990-12-03 1991-09-30 Inlet collector Expired - Lifetime EP0489238B2 (en)

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Application Number Priority Date Filing Date Title
DE4038509 1990-12-03
DE4038509A DE4038509A1 (en) 1990-12-03 1990-12-03 INTAKE DISTRIBUTOR FOR AN INTERNAL COMBUSTION ENGINE

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EP0489238A3 EP0489238A3 (en) 1992-10-21
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EP0489238B2 EP0489238B2 (en) 1998-04-08

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JP (1) JP2635873B2 (en)
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Also Published As

Publication number Publication date
ES2066312T3 (en) 1995-03-01
JPH04269367A (en) 1992-09-25
DE4038509C2 (en) 1993-09-09
EP0489238B1 (en) 1994-11-09
MX9102279A (en) 1992-05-04
CA2056491C (en) 2000-11-21
CA2056491A1 (en) 1992-06-04
DE59103497D1 (en) 1994-12-15
JP2635873B2 (en) 1997-07-30
ES2066312T5 (en) 1998-08-01
EP0489238A3 (en) 1992-10-21
US5209191A (en) 1993-05-11
DE4038509A1 (en) 1992-06-11
EP0489238B2 (en) 1998-04-08

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