WO2001023720A1 - Variable intake manifold for an internal combustion engine - Google Patents

Variable intake manifold for an internal combustion engine Download PDF

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Publication number
WO2001023720A1
WO2001023720A1 PCT/DE2000/003303 DE0003303W WO0123720A1 WO 2001023720 A1 WO2001023720 A1 WO 2001023720A1 DE 0003303 W DE0003303 W DE 0003303W WO 0123720 A1 WO0123720 A1 WO 0123720A1
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WO
WIPO (PCT)
Prior art keywords
switching
individual
intake manifold
chamber
intake
Prior art date
Application number
PCT/DE2000/003303
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German (de)
French (fr)
Inventor
Christian Puchas
Original Assignee
Kontec Gmbh
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Publication date
Application filed by Kontec Gmbh filed Critical Kontec Gmbh
Publication of WO2001023720A1 publication Critical patent/WO2001023720A1/en

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Classifications

    • 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
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • F02B27/0205—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means characterised by the charging effect
    • F02B27/0215—Oscillating pipe charging, i.e. variable intake pipe length charging
    • 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
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • F02B27/0226—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means characterised by the means generating the charging effect
    • F02B27/0247—Plenum chambers; Resonance chambers or resonance pipes
    • F02B27/0263—Plenum chambers; Resonance chambers or resonance pipes the plenum chamber and at least one of the intake ducts having a common wall, and the intake ducts wrap partially around the plenum chamber, i.e. snail-type
    • 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
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • F02B27/0226—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means characterised by the means generating the charging effect
    • F02B27/0268—Valves
    • F02B27/0273—Flap valves
    • 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
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • F02B27/0226—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means characterised by the means generating the charging effect
    • F02B27/0268—Valves
    • F02B27/0278—Multi-way valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a switching intake manifold for an internal combustion engine with the features of the preamble of claim 1.
  • Switching intake pipes have become an indispensable component in engine construction. If the engine or the internal combustion engine has only one intake manifold length, a compromise in the form of a medium intake manifold length must be chosen. It is known that a shorter intake manifold helps enhance performance, a longer intake manifold on the other hand results in a higher torque in the un ⁇ direct speed range.
  • Switching suction pipes are known from the prior art, for example EP 0 814 244 AI, US 5 092 285, US 5 632 239, JP 3-182623 A, JP 4-12126 A, JP 07158457 A, which are each designed to be relatively bulky and thereby enlarge the installation space of the motor considerably.
  • Switching suction pipes are known from DE 196 12 036 AI and JP 07197817 A, which are of a more compact design than the aforementioned ones, but can only be used in V-engines up to a V-angle of at least 90 °.
  • the main main disadvantage of the aforementioned suction systems is the switching of the intake pipe lengths in each individual intake pipe by means of individual flaps.
  • the individual flaps sit on one or more shafts, have to be installed and synchronized and seal reliably.
  • assembly openings must be available or the distribution volume is chosen so large that an internal assembly is possible.
  • a large distributor volume leads to a poor engine response.
  • the many components are responsible for the high manufacturing costs.
  • the distributor chamber is divided by a longitudinal wall into two individual chambers, each of which is assigned to a length of intake manifold.
  • the individual chambers formed in this way each communicate with the individual intake pipes via the connection openings assigned to the associated intake pipe length.
  • the connection openings between the individual chambers and the associated individual suction pipes can be switched for opening and locking by rotating the rotary slide valve.
  • This known intake manifold also has a relatively large construction, since the outer diameter of this intake manifold results from the desired difference between the two intake manifold lengths. Accordingly, this switching intake manifold is difficult or unthinkable for use in a V engine with a V angle of less than 90 °.
  • a register air suction system which has two separate line systems with pairs of separate lines of different cross-sections to each inlet of the internal combustion engine and separate distribution chambers on the ends of the respective lines facing away from the machines.
  • a switching flap is arranged at the inlet of each of these distribution chambers, which can be opened and closed. the respective distribution chamber can be actuated.
  • one switching flap must be opened and the other switching flap closed, whereby a relatively large effort has to be carried out.
  • this known switching intake manifold is also very large and is therefore relatively unsuitable for use in V engines.
  • GB 2 121 473 A shows a further, very large switching intake manifold system which has a main distributor chamber which is connected to a secondary distributor chamber via a connecting pipe.
  • Single suction pipes extend from the secondary distributor chamber and are guided in such a way that they penetrate the main distributor chamber.
  • These individual suction pipes each have a connection opening in the section that runs within the main distribution chamber, via which the individual suction pipes can communicate with the main distribution chamber.
  • Each of these connection openings is assigned its own switching flap, which closes the connection opening in a first switching position and opens the connection opening in a second switching position and at the same time blocks the individual intake pipe upstream of the connection opening.
  • switching suction pipes should be compact so that they can be used, for example, in V-engines with a small V-angle, ner than 90 °, can be integrated.
  • Plastic is a very suitable material because the poorer thermal conductivity compared to aluminum or magnesium heats the intake air through the neighboring hot engine parts less quickly and this leads to a lower intake air temperature upstream of the inlet valve and thus to better filling and higher engine performance.
  • Plastic suction systems that enable multi-shell manufacturing are almost optimal when it comes to the decisive factors of weight and manufacturing costs.
  • Fig. 1 shows a cross section through a switching suction tube according to the invention
  • Fig. 2 shows a longitudinal section through the switching suction tube according to
  • a switching intake manifold 1 is shown, which can be used for an in-line three-cylinder engine, not shown, and is equipped with three switchable intake manifold lengths.
  • a distribution chamber 2 of the switching intake manifold 1 extends in the longitudinal direction of the engine and is greatly flattened in the direction of the engine.
  • This distributor chamber 2 is divided by partition walls in the distributor chamber 2 into three approximately large individual chambers 3, each individual chamber 3 being connected to three individual suction pipes 5 via three connecting openings 6.
  • each switching flap 7 is arranged between two individual chambers 3.
  • the combustion air In the drawn position of the lower switching flap 7 (cf. FIG. 2), the combustion air only reaches the lower individual chamber 3 in engine operation, since this flap position of the combustion air prevents the supply enters the middle and the upper single chamber 3 blocked.
  • the lower individual chamber 3 takes over the function of the distribution chamber for the three cylinders, while the middle and of course the upper individual chamber 3 are without function. With the lower single chamber 3, the longest suction pipe length is activated via the connection opening 6.
  • the upper switching flap 7 If the upper switching flap 7 is now actuated, it locks the middle single chamber 3 and releases the upper single chamber 3. In this way, the short switching tube length is active.
  • the switching suction tube 1 according to the invention takes up little space, consists of few parts, is easy to manufacture and reduces weight and manufacturing costs.

Abstract

The invention relates to a variable inlet manifold for an internal combustion engine comprising inlet tracts (5), each tract comprising, along its length, transfer openings (6) for formation of various intake lengths. The individual inlet tracts (5) are connected via the openings to a distribution chamber (2). The inlet lengths of the individual inlet tracts (5) can be switched with switching flaps (7). The distribution chamber (2) has an individual chamber (3) for each intake length, which communicate with the individual inlet tracts (5) via the transfer openings (6).

Description

Schaltsaugrohr für eine Brennkraftmaschine Switching intake manifold for an internal combustion engine
Die Erfindung betrifft ein Schaltsaugrohr für eine Brennkraftmaschine mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a switching intake manifold for an internal combustion engine with the features of the preamble of claim 1.
Schaltsaugrohre sind zu einem unverzichtbaren Bestandteil im Motorenbau geworden. Hat der Motor bzw. die Brennkraftmaschine nur eine Saugrohrlange, muß ein Kompromiss in Form einer mittleren Saugrohrlange gewählt werden. Es ist bekannt, daß ein kürzeres Saugrohr leistungssteigernd wirkt, ein längeres Saugrohr dagegen ein höheres Drehmoment im un¬ teren Drehzahlbereich ergibt.Switching intake pipes have become an indispensable component in engine construction. If the engine or the internal combustion engine has only one intake manifold length, a compromise in the form of a medium intake manifold length must be chosen. It is known that a shorter intake manifold helps enhance performance, a longer intake manifold on the other hand results in a higher torque in the un ¬ direct speed range.
Aus dem Stand der Technik, z.B. EP 0 814 244 AI, US 5 092 285, US 5 632 239, JP 3-182623 A, JP 4-12126 A, JP 07158457 A sind Schaltsaugrohre bekannt, die jeweils relativ ausladend konstruiert sind und dadurch den Bauraum des Motors beträchtlich vergrößern. Aus der DE 196 12 036 AI und der JP 07197817 A sind Schaltsaugrohre bekannt, die im Vergleich zu den vorgenannten zwar kompakter aufgebaut sind, aber bei V-Motoren nur bis zu einem V- inkel von mindestens 90° einsetzbar sind. Der wesentliche Hauptnachteil der vorgenannten Sauganlagen ist jedoch die Schaltung der Saugrohrlangen in jedem Einzelsaugrohr durch Einzelklappen. Die Einzelklappen sitzen auf einer oder mehreren Wellen, müssen montiert und synchronisiert werden und zuverlässig dichten. Allein für die Montage und Justierung müssen Montageöffnungen vorhanden sein oder das Verteilervolumen wird so groß gewählt, daß eine innere Montage möglich wird. Ein großes Verteilervolumen fuhrt aber zu einem tragen Ansprechverhalten des Motors. Die vielen Bauteile sind verantwortlich für die hohen Herstellkosten.Switching suction pipes are known from the prior art, for example EP 0 814 244 AI, US 5 092 285, US 5 632 239, JP 3-182623 A, JP 4-12126 A, JP 07158457 A, which are each designed to be relatively bulky and thereby enlarge the installation space of the motor considerably. Switching suction pipes are known from DE 196 12 036 AI and JP 07197817 A, which are of a more compact design than the aforementioned ones, but can only be used in V-engines up to a V-angle of at least 90 °. The main main disadvantage of the aforementioned suction systems, however, is the switching of the intake pipe lengths in each individual intake pipe by means of individual flaps. The individual flaps sit on one or more shafts, have to be installed and synchronized and seal reliably. For the assembly and adjustment alone, assembly openings must be available or the distribution volume is chosen so large that an internal assembly is possible. A large distributor volume, however, leads to a poor engine response. The many components are responsible for the high manufacturing costs.
Aus der OS-DE 39 21 081 AI ist ein weiteres Schaltsaugrohr bekannt, bei dem die Schaltung zweier Saugrohrlangen durch einen Walzendrehschieber erfolgt. Zwar sind hier die vielen Schaltklappen durch ein Schaltmittel ersetzt, doch sind der erforderliche Bauraum und das Gewicht betrachtlich, denn der Durchmesser der Walze ergibt sich aus der gewünschten Differenz der beiden Saugrohrlangen, die Baulange der Walze entspricht ohnehin etwa der Motorlange. Der Einsatz ist auch nur für V-Motoren denkbar, deren V-Winkel großer als 90° ist. Die Leckverluste oder die Schaltkrafte sind beträchtlich.From OS-DE 39 21 081 AI a further switching intake manifold is known, in which the switching of two intake manifold lengths is carried out by a rotary slide valve. Although the many switching flaps have been replaced by a switching device, the space and weight required are considerable, because the diameter of the roller results from the desired difference between the two suction tube lengths, and the overall length of the roller corresponds to the engine length anyway. Use is also only conceivable for V engines with a V angle greater than 90 °. The leakage losses or the switching forces are considerable.
Aus der JP 10110620 A ist ein Schaltsaugrohr der eingangs genannten Art bekannt, das mehrere Einzelsaugrohre aufweist, die jeweils zur Ausbildung von zwei unterschiedlichen Saugrohrlangen entlang ihrer Lange zwei Verbindungsoffnungen aufweisen, mit denen die Einzelsaugrohre mit einer Vertei- lerkammer kommunizieren. Das bekannte Schaltsaugrohr ist als Walzendrehschieber ausgebildet, bei dem die Verteilerkammer im zentral angeordneten Drehschieber ausgebildet ist. Die Einzelsaugrohre umschließen dabei den darin gelagerten Drehschieber. Dieser Drehschieber bildet ein Schaltelement, mit dem die verschiedenen Saugrohrlangen der Einzelsaugrohre geschaltet werden. Das Innere des Drehschiebers, also die Verteilerkammer, ist durch eine Langswand in zwei Einzelkammern unterteilt, die jeweils einer Saugrohrlange zugeordnet sind. Die so gebildeten Einzelkammern kommunizieren jeweils über die der zugehörigen Saugrohrlange zugeordneten Verbindungsoffnungen mit den Einzelsaugrohren. Durch eine Drehverstellung des Walzendrehschiebers können die Verbindungsoff- nungen zwischen den Einzelkammern und den zugehörigen Ein- zelsaugrohren zum Offnen und Sperren geschaltet werden. Auch dieses bekannte Schaltsaugrohr baut relativ groß, da sich der Außendurchmesser dieses Schaltsaugrohrs aus der gewünschten Differenz der beiden Saugrohrlangen ergibt. Dementsprechend ist auch dieses Schaltsaugrohr für einen Einsatz bei einem V-Motor mit einem V-Winkel kleiner als 90° schwierig oder undenkbar.From JP 10110620 A, a switching intake manifold of the type mentioned at the outset is known, which has a plurality of individual intake manifolds, each of which has two connecting openings along its length to form two different intake manifold lengths, with which the individual intake manifolds with a distributor communicate chamber. The known switching suction tube is designed as a rotary rotary valve, in which the distribution chamber is formed in the centrally arranged rotary valve. The individual suction pipes enclose the rotary valve stored in it. This rotary valve forms a switching element with which the various intake pipe lengths of the individual intake pipes are switched. The inside of the rotary valve, i.e. the distributor chamber, is divided by a longitudinal wall into two individual chambers, each of which is assigned to a length of intake manifold. The individual chambers formed in this way each communicate with the individual intake pipes via the connection openings assigned to the associated intake pipe length. The connection openings between the individual chambers and the associated individual suction pipes can be switched for opening and locking by rotating the rotary slide valve. This known intake manifold also has a relatively large construction, since the outer diameter of this intake manifold results from the desired difference between the two intake manifold lengths. Accordingly, this switching intake manifold is difficult or unthinkable for use in a V engine with a V angle of less than 90 °.
Aus der DE 32 24 946 AI ist eine Register-Luftsauganlage bekannt, die zwei getrennte Leitungssysteme mit paarweise gesonderten Leitungen von unterschiedlichen Querschnitten zu jedem Einlaß der Brennkraftmaschine und getrennte Verteilkammern an den Maschinen abgewandten Enden der jeweiligen Leitungen aufweist. Am Einlaß jeder dieser Verteilerkammern ist eine Schaltklappe angeordnet, die zum Offnen und Schlie- ßen der jeweiligen Verteilerkammer betatigbar ist. Um beispielsweise von dem einen Leitungssystem, das Leitungen mit relativ kleinem Querschnitt und relativ großer Lange aufweist, auf das andere Leitungssystem, dessen Leitungen relativ große Querschnitte besitzen und relativ kurz sind, umzuschalten, muß dementsprechend die eine Schaltklappe geöffnet und die andere Schaltklappe geschlossen werden, wodurch ein relativ großer Aufwand betrieben werden muß. Des weiteren baut auch dieses bekannte Schaltsaugrohr sehr groß und ist daher für einen Einsatz bei V-Motoren relativ ungeeignet.From DE 32 24 946 AI a register air suction system is known which has two separate line systems with pairs of separate lines of different cross-sections to each inlet of the internal combustion engine and separate distribution chambers on the ends of the respective lines facing away from the machines. A switching flap is arranged at the inlet of each of these distribution chambers, which can be opened and closed. the respective distribution chamber can be actuated. For example, in order to switch from one line system, which has lines with a relatively small cross section and a relatively long length, to the other line system, the lines of which have relatively large cross sections and are relatively short, one switching flap must be opened and the other switching flap closed, whereby a relatively large effort has to be carried out. Furthermore, this known switching intake manifold is also very large and is therefore relatively unsuitable for use in V engines.
Die GB 2 121 473 A zeigt eine weitere, sehr groß bauende Schaltsaugrohranlage, die eine Hauptverteilerkammer aufweist, die über ein Verbindungsrohr mit einer Nebenverteilerkammer verbunden ist. Von der Nebenverteilerkammer gehen Einzelsaugrohre aus, die so gefuhrt sind, daß sie die Haupt- verteilerkammer durchdringen. Diese Einzelsaugrohre besitzen m dem Abschnitt, der innerhalb der Hauptverteilerkammer verlauft, jeweils eine Verbindungsoffnung, über die die Em- zelsaugrohre mit der Hauptverteilerkammer kommunizieren können. Jeder dieser Verbindungsoffnungen ist eine eigene Schaltklappe zugeordnet, die in einer ersten Schaltstellung die Verbindungsoffnung schließt und in einer zweiten Schalt- stellung die Verbindungsoffnung öffnet und gleichzeitig das Einzelsaugrohr stromauf der Verbindungsoffnung sperrt.GB 2 121 473 A shows a further, very large switching intake manifold system which has a main distributor chamber which is connected to a secondary distributor chamber via a connecting pipe. Single suction pipes extend from the secondary distributor chamber and are guided in such a way that they penetrate the main distributor chamber. These individual suction pipes each have a connection opening in the section that runs within the main distribution chamber, via which the individual suction pipes can communicate with the main distribution chamber. Each of these connection openings is assigned its own switching flap, which closes the connection opening in a first switching position and opens the connection opening in a second switching position and at the same time blocks the individual intake pipe upstream of the connection opening.
Insbesondere für kleinere, sparsame Brennkraftmaschinen, sollten Schaltsaugrohre kompakt sein, damit sie beispielsweise bei V-Motoren mit kleinem V-Winkel, insbesondere klei- ner als 90°, integrierbar sind. Kunststoff ist ein gut geeigneter Werkstoff, weil der schlechtere Warmeleitwert gegenüber Aluminium oder Magnesium die Ansaugluft durch die benachbarten heißen Motorteile weniger schnell aufheizt und dies zu einer niedrigeren Ansauglufttemperatur vor dem Einlaßventil und damit zu besserer Füllung und zu höherer Motorleistung fuhrt. Nahezu optimal sind Kunststoffsauganlagen, die eine Fertigung in Mehrschalentechnik ermöglichen, wenn es um die entscheidenden Faktoren Gewicht und Herstellungskosten geht.In particular for smaller, more economical internal combustion engines, switching suction pipes should be compact so that they can be used, for example, in V-engines with a small V-angle, ner than 90 °, can be integrated. Plastic is a very suitable material because the poorer thermal conductivity compared to aluminum or magnesium heats the intake air through the neighboring hot engine parts less quickly and this leads to a lower intake air temperature upstream of the inlet valve and thus to better filling and higher engine performance. Plastic suction systems that enable multi-shell manufacturing are almost optimal when it comes to the decisive factors of weight and manufacturing costs.
Die vorliegende Erfindung beschäftigt sich mit dem Problem, ein kompaktes und damit für alle gangigen Motorbauarten einsetzbares, leichtes, fertigungs- und montagefreundliches, mit einem Minimum an Schaltklappen auskommendes und deshalb kostenoptimiertes Schaltsaugrohr zu konzipieren.The present invention is concerned with the problem of designing a compact, therefore lightweight, production-friendly and assembly-friendly, which can be used for all common engine types and which manages with a minimum of switching flaps and is therefore cost-optimized.
Dieses Problem wird erfmdungsgemaß durch ein Schaltsaugrohr mit dem Merkmalen des Anspruchs 1 gelost. Vorteilhafte Ausfuhrungsformen und Weiterbildungen ergeben sich aus den Un- teranspruchen.This problem is solved according to the invention by a switching intake manifold with the features of claim 1. Advantageous embodiments and further developments result from the subclaims.
Durch den erfmdungsgemaßen Aufbau des Schaltsaugrohrs sind unabhängig von der Anzahl der Einzelsaugrohre für eine schaltbare Saugrohrlange lediglich eine Einzelkammer mit den entsprecnenden Verbindungsoffnungen und eine Schaltklappe erforderlich. Der Aufwand zur Herstellung eines derartigen Schaltsaugrohrs ist somit relativ gering. In den nachfolgend beschriebenen Figuren ist ein bevorzugtes Ausfuhrungsbeispiel der Erfindung dargestellt. Es zeigen, jeweils schematisch:Due to the construction of the switching intake manifold according to the invention, only a single chamber with the corresponding connection openings and a switching flap are required for a switchable intake manifold regardless of the number of individual intake manifolds. The effort to manufacture such a switching suction tube is therefore relatively low. In the figures described below, a preferred exemplary embodiment of the invention is shown. Each shows schematically:
Fig. 1 einen Querschnitt durch ein erfmdungsgemaßes Schaltsaugrohr undFig. 1 shows a cross section through a switching suction tube according to the invention and
Fig. 2 einen Längsschnitt durch das Schaltsaugrohr gemäßFig. 2 shows a longitudinal section through the switching suction tube according to
Fig. 1.Fig. 1.
In den Figuren 1 und 2 ist ein Schaltsaugrohr 1 dargestellt, das für einen nicht dargestellten Reihen-Drei-Zylinder-Motor verwendbar ist und mit drei schaltbaren Saugrohrlangen ausgestattet ist.In Figures 1 and 2, a switching intake manifold 1 is shown, which can be used for an in-line three-cylinder engine, not shown, and is equipped with three switchable intake manifold lengths.
Entsprechend Fig. 1 erstreckt sich eine Verteilerkammer 2 des Schaltsaugrohrs 1 in Motorlangsrichtung und ist in Mo- torquemchtung stark abgeflacht. Diese Verteilerkammer 2 ist durch Zwischenwände in der Verteilerkammer 2 in drei annähernd große Einzelkammern 3 unterteilt, wobei jede Einzelkammer 3 über drei Verbindungsoffnungen 6 mit drei Einzelsaugrohren 5 verbunden ist.1, a distribution chamber 2 of the switching intake manifold 1 extends in the longitudinal direction of the engine and is greatly flattened in the direction of the engine. This distributor chamber 2 is divided by partition walls in the distributor chamber 2 into three approximately large individual chambers 3, each individual chamber 3 being connected to three individual suction pipes 5 via three connecting openings 6.
Entsprechend Fig. 2 sind vor den Einzelsaugrohren 5 nur zwei Schaltklappen 7 angeordnet. Jede Schaltklappe 7 ist zwischen zwei Einzelkammern 3 angeordnet. In der gezeichneten Stellung der unteren Schaltklappe 7 (vgl. Fig. 2) gelangt im Motorbetrieb die Verbrennungsluft nur m die untere Einzelkammer 3, da diese Klappenstellung der Verbrennungsluft den Zu- tritt in die mittlere und in die obere Einzelkammer 3 versperrt. Die untere Einzelkammer 3 übernimmt die Funktion der Verteilerkammer für die drei Zylinder, wahrend die mittlere und naturlich auch die obere Einzelkammer 3 ohne Funktion sind. Mit der unteren Einzelkammer 3 ist über die Verbindungsoffnung 6 die längste Saugrohrlange aktiviert.2, only two switching flaps 7 are arranged in front of the individual intake pipes 5. Each switching flap 7 is arranged between two individual chambers 3. In the drawn position of the lower switching flap 7 (cf. FIG. 2), the combustion air only reaches the lower individual chamber 3 in engine operation, since this flap position of the combustion air prevents the supply enters the middle and the upper single chamber 3 blocked. The lower individual chamber 3 takes over the function of the distribution chamber for the three cylinders, while the middle and of course the upper individual chamber 3 are without function. With the lower single chamber 3, the longest suction pipe length is activated via the connection opening 6.
Wird nun die untere Schaltklappe 7 (vgl. Fig. 2) betätigt und mit ihr die untere Einzelkammer 3 verschlossen und bleibt die obere Schaltklappe 7 in der gezeichneten Stellung, kann die Verbrennungsluft nur in die mittlere Einzelkammer 3 einströmen, da die untere und die obere Einzelkammer 3 durch die Schaltklappen 7 verschlossen sind. Jetzt wird die mittlere Einzelkammer 3 zur Verteilerkammer und die mittlere Saugrohrlange ist über die Verbindungsöffnungen 6 in Betrieb. Obere und untere Einzelkammer 3 sind dann ohne Funktion .If the lower switching flap 7 (see FIG. 2) is actuated and the lower individual chamber 3 is closed with it and the upper switching flap 7 remains in the position shown, the combustion air can only flow into the middle single chamber 3, since the lower and the upper Single chamber 3 are closed by the switching flaps 7. Now the middle single chamber 3 becomes the distributor chamber and the middle suction pipe length is in operation via the connection openings 6. Upper and lower individual chamber 3 are then without function.
Wenn nun die obere Schaltklappe 7 betätigt wird, sperrt diese die mittlere Einzelkammer 3 und gibt die obere Einzelkammer 3 frei. Auf diese Weise ist dann die kurze Schaltrohr- lange aktiv.If the upper switching flap 7 is now actuated, it locks the middle single chamber 3 and releases the upper single chamber 3. In this way, the short switching tube length is active.
Fig. 1 zeigt außerdem, daß durch die an die abgeflachte Verteilerkammer 2 angeschmiegten Einzelsaugrohre 5 das Schaltsaugrohr 1 so kompakt wird, daß es auch beispielsweise an V- 60° Motoren angebaut werden kann. Da die Schaltklappen 7 vor den Einzelsaugrohren 5 angeordnet sind, ergeben sich beste Voraussetzungen für den Einsatz der kostengünstigen Kunststoff-Schalentechnik bei der Verteilerkammer 2 mit den Einzelsaugrohren 5.Fig. 1 also shows that through the flattened distribution chamber 2 nestled individual suction pipes 5, the switching suction pipe 1 is so compact that it can also be attached to V-60 ° engines, for example. Since the switching flaps 7 are arranged in front of the individual suction pipes 5, the best conditions result for the use of the inexpensive plastic shell technology in the distribution chamber 2 with the individual suction pipes 5.
Von Bedeutung ist noch der stromungsgunstige Luftemlauf über die Verbindungsoffnungen 6 in die Einzelsaugrohre 5, weil jetzt keine Schaltmittel vor den Verbindungsof nungen 6 zu Verwirbelungen fuhren. Besonders wichtig ist dies bei der kürzesten Saugrohrlange, da mit ihr der Motor seine Maximal- leistung erreicht. Das Ziel der Schaltklappen-Minimierung ist erreicht, da unabhängig von der Zylinderzahl des Motors lediglich eine Schaltklappe 7 für die Steuerung einer zusatzlichen Saugrohrlange benotigt wird.Of importance is still the streamlined air flow through the connection openings 6 into the individual intake pipes 5, because now no switching means lead to swirls in front of the connection openings 6. This is particularly important with the shortest intake manifold length, as this enables the engine to reach its maximum performance. The aim of minimizing the switching flap has been achieved since, regardless of the number of cylinders in the engine, only one switching flap 7 is required for controlling an additional length of intake manifold.
Das erfindungsgemaße Schaltsaugrohr 1 beansprucht wenig Bauraum, besteht aus wenig Teilen, ist einfach zu fertigen und reduziert Gewicht und Herstellkosten. The switching suction tube 1 according to the invention takes up little space, consists of few parts, is easy to manufacture and reduces weight and manufacturing costs.

Claims

Ansprüche Expectations
1. Schaltsaugrohr für eine Brennkraftmaschine, mit mehreren Einzelsaugrohren (5), die jeweils zur Ausbildung von wenigstens zwei unterschiedlichen Saugrohrlangen entlang ihrer Lange wenigstens zwei Verbindungsoffnungen (6) aufweisen, mit denen die Einzelsaugrohre (5) mit einer Verteilerkammer (2) kommunizieren, wobei Schaltelemente (7) vorgesehen sind, mit denen die verschiedenen Saugrohrlangen der Einzelsaugrohre (5) geschaltet werden, wobei die Verteilerkammer (2) für jede Saugrohrlange eine Einzelkammer (3) aufweist, wobei die Einzelkammern (3) jeweils über die der zugehörigen Saugrohrlange zugeordneten Verbindungsoffnungen (6) mit den Einzelsaugrohren (5) kommunizieren, wobei die Schaltelemente (7) die Einzelkammern (3) zum Offnen und Sperren schalten, dadurch gekennzeichnet, daß die Schaltelemente (7) jeweils die Eingangsseiten der Einzelkammern (3^ zum Offnen und Sperren schalten, und daß wenigstens eines der Schaltelemente (7) mindestens zwei Einzelkammern (7) zugeordnet und so ausgebildet und angeordnet ist, daß es m einer ersten Schaltstellung mindestens eine der zugeordneten Einzelkammern (7) offen schaltet und gleichzeitig die anderen zugeordneten Einzelkammern (7) geschlossen schaltet und daß es in einer zweiten Schaltstellung die besagte mindestens eine Einzelkammer (7) geschlossen schaltet und gleichzeitig die anderen zugeordneten Einzelkammern (7) offen schaltet.1. Switching intake manifold for an internal combustion engine, with a plurality of individual intake pipes (5), each of which has at least two connecting openings (6) for forming at least two different intake pipe lengths along its length, with which the individual intake pipes (5) communicate with a distributor chamber (2), whereby Switching elements (7) are provided with which the various intake manifold lengths of the individual intake manifolds (5) are switched, the distributor chamber (2) having an individual chamber (3) for each intake manifold length, the individual chambers (3) each via the connection openings assigned to the associated intake manifold length (6) communicate with the individual suction pipes (5), the switching elements (7) switching the individual chambers (3) for opening and locking, characterized in that the switching elements (7) each switch the input sides of the individual chambers (3 ^ for opening and locking , and that at least one of the switching elements (7) is assigned to at least two individual chambers (7) u nd is designed and arranged such that it switches at least one of the assigned individual chambers (7) in a first switching position and at the same time switches the other assigned individual chambers (7) closed and that in a second switching position it switches said at least one individual chamber (7) closed and at the same time switches the other assigned individual chambers (7) open.
2. Schaltsaugrohr nach Anspruch 1, dadurch gekennzeichnet, daß sich die Verteilerkammer (2) im Einbauzustand in Längsrichtung der Brennkraftmaschine erstreckt.2. intake manifold according to claim 1, characterized in that the distributor chamber (2) extends in the installed state in the longitudinal direction of the internal combustion engine.
3. Schaltsaugrohr nach Anspruch 1 oder 2, dadurch gekennzeichne , daß die Einzelsaugrohre (5) um die Verteilerkammer (2) herumgeführt sind.3. Switching suction pipe according to claim 1 or 2, characterized in that the individual suction pipes (5) are guided around the distribution chamber (2).
4. Schaltsaugrohr nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sich die Einzelsaugrohre (5) senkrecht zur Verteilerkammer (2) erstrecken.4. Switching suction pipe according to one of claims 1 to 3, characterized in that the individual suction pipes (5) extend perpendicular to the distribution chamber (2).
5. Schaltsaugrohr nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Einzelsaugrohre (5) an der Verteilerkammer (2) anliegen .5. Switching suction pipe according to one of claims 1 to 4, characterized in that the individual suction pipes (5) abut the distribution chamber (2).
6. Schaltsaugrohr nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Einzelkammern (3) m der Verteilerkammer (2) durch Unterteilung (4) der Verteilerkammer (2) ausgebildet sind.6. Switching suction pipe according to one of claims 1 to 5, characterized in that the individual chambers (3) m of the distributor chamber (2) are formed by subdivision (4) of the distributor chamber (2).
7. Schaltsaugrohr nach Anspruch 6, dadurch gekennzeichnet, daß die Unterteilung der Verteilerkammer (2) mittels mindestens einer Zwischenwand (4) erfolgt, um die Einzelkammern (3) m der Verteilerkammer (2) auszubilden.7. intake manifold according to claim 6, characterized in that the subdivision of the distribution chamber (2) by means of at least one partition (4) takes place in order to form the individual chambers (3) m of the distribution chamber (2).
8. Schaltsaugrohr nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Schaltelemente (7) so ausgebildet sind, daß stets nur eine der Einzelkammern (3) die Funktion einer Verteilerkammer übernimmt, wahrend die anderen Einzelkammern (3) verschlossen und ohne Funktion sind.8. Switching suction pipe according to one of claims 1 to 7, characterized in that the switching elements (7) are designed so that only one of the individual chambers (3) takes over the function of a distribution chamber, while the other individual chambers (3) are closed and without function are.
9. Schaltsaugrohr nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Schaltelemente durch Schaltklappen (7) oder durch andere Ventilmittel wie beispielsweise Schieber gebildet9. Switching intake manifold according to one of claims 1 to 8, characterized in that the switching elements are formed by switching flaps (7) or by other valve means such as sliders
10. Schaltsaugrohr nach Anspruch 9, dadurch gekennzeichnet, daß eine Achse (8) der Schaltklappe (7) annähernd in der Ebene der Zwischenwand (4) und quer zur Langsachse der Brennkraftmaschine liegt. 10. intake manifold according to claim 9, characterized in that an axis (8) of the switching flap (7) is approximately in the plane of the intermediate wall (4) and transverse to the longitudinal axis of the internal combustion engine.
PCT/DE2000/003303 1999-09-25 2000-09-21 Variable intake manifold for an internal combustion engine WO2001023720A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102006046534B4 (en) * 2006-09-29 2010-07-08 Audi Ag Suction tube arrangement for an internal combustion engine with a gas-carrying flow channel
WO2010086981A1 (en) * 2009-01-29 2010-08-05 トヨタ自動車株式会社 Vehicle control device and control method

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