DE4003492C1 - Air intake for IC engine - has air intake lines extending from rotary manifold to each cylinder - Google Patents

Air intake for IC engine - has air intake lines extending from rotary manifold to each cylinder

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Publication number
DE4003492C1
DE4003492C1 DE4003492A DE4003492A DE4003492C1 DE 4003492 C1 DE4003492 C1 DE 4003492C1 DE 4003492 A DE4003492 A DE 4003492A DE 4003492 A DE4003492 A DE 4003492A DE 4003492 C1 DE4003492 C1 DE 4003492C1
Authority
DE
Germany
Prior art keywords
lines
intake
air intake
manifold
engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE4003492A
Other languages
German (de)
Inventor
Thomas Dipl.-Ing. 7441 Unterensingen De Hardt
Christian Dipl.-Ing. 7066 Baltmannsweiler De Enderle
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.)
Daimler Benz AG
Original Assignee
Mercedes Benz AG
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Filing date
Publication date
Application filed by Mercedes Benz AG filed Critical Mercedes Benz AG
Priority to DE4003492A priority Critical patent/DE4003492C1/en
Application granted granted Critical
Publication of DE4003492C1 publication Critical patent/DE4003492C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • 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
    • F02B27/0231—Movable ducts, walls or the like
    • F02B27/0236—Movable ducts, walls or the like with continuously variable adjustment of a length or width
    • 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
    • F02B27/0257—Rotatable plenum chambers
    • 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
    • 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
    • F02M35/10026—Plenum chambers
    • F02M35/10039—Intake ducts situated partly within or on the plenum chamber housing
    • 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
    • F02M35/10072—Intake runners
    • 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
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10137—Flexible ducts, e.g. bellows or hoses
    • 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
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four
    • 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
    • F02B75/20—Multi-cylinder engines with cylinders all in one line
    • 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
    • F02M35/10373—Sensors for intake systems
    • F02M35/10386—Sensors for intake systems for flow rate
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

The air intake lines radiate from an axially rotating manifold to each cylinder and can extend infinitely, coiling adjacently round part of the manifold so that the effective length of the lines is governed by the angle of turn of the manifold. The intake lines (6) consist exclusively of flexible coil spring stiffened (8) plastics hoses each issuing tangentially into the manifold (3). Downstream of the lines there is a choke flap (9) in the respective intake ducts (7). USE/ADVANTAGE - I.c. engines. Spring reinforced plastics hoses as lines can be extended at will without additional sealing problems.

Description

Die Erfindung betrifft eine Luftansaugvorrichtung für Brenn­ kraftmaschinen nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an air intake device for burning Engines according to the preamble of patent claim 1.

Eine derartige Luftansaugvorrichtung ist aus DE-U-87 04 464 bekannt. Durch die mit jener Vorrichtung mögliche Veränderung der wirksamen Länge der einzelnen Ansaugleitungen ist es mög­ lich, in jedem Drehzahlbereich einer Brennkraftmaschine einen optimalen Leistungswirkungsgrad zu erzielen und zwar dadurch, daß die wirksame Länge der Ansaugleitungen mit steigender Drehzahl der Brennkraftmaschine verkürzt wird.Such an air intake device is from DE-U-87 04 464 known. By the possible change with that device the effective length of the individual suction lines is possible Lich, one in every speed range of an internal combustion engine to achieve optimal performance efficiency by that the effective length of the suction lines increases Engine speed is shortened.

Bei der Vorrichtung nach jenem Gebrauchsmuster wird die wirk­ same Länge der einzelnen um den drehbaren Sammelbehälter ge­ wundenenen Ansaugleitungen durch ein teleskopartiges Inein­ anderschieben der einzelnen Ansaugleitungen erzielt. Ein sol­ ches Ineinanderschieben ist mit relativ hohen Reibungsverlu­ sten behaftet und wirft zudem Dichtprobleme auf.In the device according to that utility model, the effect same length of the individual ge around the rotatable collecting container wound suction lines through a telescopic Inein pushing the individual intake lines achieved. A sol Pushing one into the other is with relatively high friction loss most affected and also causes sealing problems.

Eine Ansaugvorrichtung mit längenveränderbaren Ansaugleitungen ist auch aus DE-A-36 28 065 bekannt. Dort werden unter anderem Ansaugleitungen aus elastischem Material beschrieben, wobei die Elastizität ein Längen und Kürzen der Leitungen durch Deh­ nen oder Entlasten erlaubt. Jene Schrift weist jedoch keinen praktikablen Weg auf, wie eine derartige elastische Leitung bei einer Brennkraftmaschine eingesetzt werden kann. Denn eine sich in der Länge verändernde Leitung bedarf einer speziellen Lagerung, für die dort keine Lösung entnehmbar ist. Besondere Probleme wirft eine solche Lagerung vor allem dann auf, wenn die Ansaugleitungen von einem gemeinsamen fest mit der Brenn­ kraftmaschine verbundenen Luftsammelbehälter ausgehen sollen und im übrigen der Einbauraum, der für die Ansaugvorrichtung zur Verfügung steht, klein bemessen ist. Für solche Fälle ist ein Einsatz jener elastischen Ansaugleitungen in keiner Weise erkennbar.A suction device with adjustable suction lines is also known from DE-A-36 28 065. There will be, among other things Suction lines described from elastic material, wherein the elasticity a lengthening and shortening of the lines by Deh allowed or relieved. That scripture, however, shows none practical way on how such an elastic pipe can be used in an internal combustion engine. Because one a line that changes in length requires a special one  Storage for which there is no solution. Special Such storage poses problems especially if the suction lines from a common fixed with the burning engine-connected air collection container should go out and the rest of the installation space for the suction device is available, is small. For such cases use of those elastic suction lines in no way recognizable.

In der Praxis ist daher auch ein grundsätzlich anderer Weg eingeschlagen worden. Dieser besteht auf breiter Front darin, den Luftsammelbehälter als um seine Achse drehbare Trommel so in einem feststehenden Mantelgehäuse anzuordnen, daß ein Ring­ raum zwischen der Luftsammelbehälter-Trommel und dem Mantelge­ häuse gegeben ist. In diesen Ringraum münden die einzelnen zu den Brennkammern der Brennkraftmaschine führenden Ansauglei­ tungen, wobei die Ansaugleitungen jeweils über eine Gleitdich­ tung dicht an der Behälter-Trommel anliegen, so daß der Ring­ raum im Bereich der einmündenden Ansaugleitungen umfangsmäßig unterbrochen ist. Die wirksame Ansaugweglänge wird dadurch va­ riiert, daß aus der Trommel eine radiale Austrittsöffnung in den Ringkanal mündet, deren Umfangslage durch Verdrehen der Trommel zwischen einem Mini- und einem Maximalwert veränderbar ist. Die variable Länge entspricht praktisch dem Umfang des Ringkanals. Eine nach diesem Prinzip arbeitende Ansaugvorrich­ tung ist bereits aus DE-PS 9 57 802 bekannt. In der Zwischen­ zeit sind zahlreiche verschiedene Variationen dieses Prinzips verwirklicht worden, wie unter anderem noch die aus der jüng­ sten Zeit datierenden Veröffentlichungen DE-A-36 08 310 und DE-Z: ATZ 89 (1987), 6, S. 331-332 zeigen. Alle diese Ausfüh­ rungen haben jedoch gemeinsam den gravierenden Nachteil, daß sich gegeneinander bewegende Teile über relativ große Flächen kompliziert gedichtet werden müssen, wodurch die Veränderung der Ansauglängen jeweils mit erheblichen Reibverlusten verbun­ den ist.In practice, there is therefore a fundamentally different approach been smashed. On a broad front, this consists of the air collection container as a drum rotatable about its axis to arrange in a fixed casing that a ring space between the air collecting drum and the jacket is given. The individual flow into this annulus the intake chambers leading the combustion chambers of the internal combustion engine lines, with the suction lines each having a sliding seal tion lie close to the container drum, so that the ring circumferential area in the area of the intake pipes is interrupted. The effective suction path length is thereby above all riiert that from the drum a radial outlet opening in the ring channel opens, the circumferential position by turning the The drum can be changed between a minimum and a maximum value is. The variable length practically corresponds to the scope of the Ring channel. An intake device working on this principle device is already known from DE-PS 9 57 802. In the meantime time are numerous different variations of this principle have been realized, including the one from the recent Most time-dated publications DE-A-36 08 310 and DE-Z: ATZ 89 (1987), 6, pp. 331-332. All of these executions However, stanchions together have the serious disadvantage that moving parts over relatively large areas complicated to be sealed, causing the change  of the intake lengths combined with considerable friction losses that is.

Hierdurch soll nunmehr die Aufgabe gelöst werden, die gattungsgemäße Luftansaugvorrichtung derart weiterzubilden, daß neben einer leichten Verstellbarkeit der Saugrohrlängen und widerstandsarmen Luftströmung eine ungestörte Steuerung der angesaugten Luftmenge erreicht wird.This is now intended to solve the problem that Generic air intake device in such a way that in addition to easy adjustability of the intake manifold lengths and low resistance air flow an undisturbed control of the intake air quantity is reached.

Gelöst wird diese Aufgabe durch eine gattungsgemäße Luftan­ saugvorrichtung mit den kennzeichnenden Merkmalen des Patent­ anspruche 1.This task is solved by a generic air Suction device with the characterizing features of the patent claims 1.

Der besondere Vorteil der Erfindung besteht darin, die Längen­ veränderbarkeit der Ansaugleitungen auf konstruktiv einfache Weise und ohne besondere Dichtprobleme zu lösen. Die flexiblen Ansaugleitungen können jeweils mit ihren Gegenpartnern, d. h. den Einlaßkanälen der Brennkraftmaschine einerseits und dem Sammelbehälter der Ansaugvorrichtung andererseits verbunden werden. In der gesamten Luftansaugvorrichtung gibt es nur noch eine Stelle, an der eine Dichtung zwischen sich bewegenden Teilen vorzusehen ist. Bei dieser Stelle handelt es sich um diejenige, an der der Sammelbehälter, von dem die einzelnen flexiblen Ansaugleitungen abzweigen, drehbar auf einem in den Sammelbehälter hineinragenden zentralen Ansaugrohr gelagert ist. Jenes Luftansaugrohr kann als Luftberuhigungsstrecke die­ nen und einen Luftmassenmesser aufnehmen.The particular advantage of the invention is the lengths Changeability of the intake lines to structurally simple To solve wise and without special sealing problems. The flexible Suction lines can each work with their counterparty, i.e. H. the inlet channels of the internal combustion engine on the one hand and the Collecting container of the suction device on the other hand connected will. There is only one thing left in the entire air intake device a place where a seal is moving between Parts must be provided. This place is about the one to which the collection container from which the individual branch off flexible suction lines, rotatable on one in the Central intake pipe protruding into the storage tank is. That air intake pipe can act as an air calming section and take an air mass meter.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Es zeigenAn embodiment of the invention is in the drawing shown. Show it

Fig. 1 eine Draufsicht auf eine Luftansaugvorrichtung für einen 4-Zylinder-Motor Fig. 1 is a plan view of an air intake device for a 4-cylinder engine

Fig. 2 einen Schnitt durch die Luftansaugvorrichtung nach Linie II-II. Fig. 2 shows a section through the air intake device according to line II-II.

Die Ansaugluft einer 4-Zylinder-Brennkraftmaschine gelangt durch ein feststehendes Ansaugrohr 1, das stromab trompeten­ förmig aufgeweitet ist und mit einem Luftmassenmesser 2 in seinem Inneren versehen ist, in einen Luftsammelbehälter 3. Das Ansaugrohr 1 wirkt als Luftberuhigungsstrecke. Der Sam­ melbehälter 3 ist um seine Achse drehbar in einem Lager 4 auf dem Ansaugrohr 1 gelagert. Das Lager 4 wird an dem entgegen­ gesetzten Ende des Sammelbehälters noch durch ein weiteres sich an dem Motor fest abstützendes Lager 5 unterstützt. Im Bereich des Dreh-Lagers 4 ist das Innere des Sammelbehälters 3 gegenüber den angrenzenden Atmosphärenbereich gedichtet. Diese Dichtung kann eine übliche Wellen-Naben-Dichtung sein.The intake air of a 4-cylinder internal combustion engine passes through a fixed intake pipe 1 , which is expanded in a trumpet shape downstream and is provided with an air mass meter 2 in its interior, into an air collection container 3 . The intake pipe 1 acts as an air calming section. The Sam mel container 3 is rotatable about its axis in a bearing 4 on the intake pipe 1 . The bearing 4 is supported at the opposite end of the collecting container by another bearing 5 which is firmly supported on the motor. In the area of the rotary bearing 4 , the interior of the collecting container 3 is sealed off from the adjacent atmospheric area. This seal can be a common shaft-hub seal.

Tangential in den Umfang des beispielsweise zylindrisch ausge­ stalteten Luftsammelbehälters münden flexible Ansaugleitungen 6 ein. Diese Ansaugleitungen 6 umschlingen mit einem Teil ihrer Länge den Umfang des Sammelbehälters 3 und sind an ihrem von dem Luftsammelbehälter abgewandten Ende jeweils mit einem Ansaugkanal 7 der Brennkraftmaschine fest verbunden.Flexible suction lines 6 open tangentially into the circumference of the, for example, cylindrically designed air collection container. These intake lines 6 loop with part of their length around the circumference of the collecting container 3 and are each firmly connected at their end facing away from the air collection container to an intake duct 7 of the internal combustion engine.

Die flexiblen Ansaugleitungen 6 bestehen aus einem spiralfe­ derverstärktem Kunststoff-Schlauch. Die die Kunststoffhülle des Schlauches verstärkende Spiralfeder 8 ist so gewickelt, daß der zugkraftfreie Schlauch sich auf seine Minimallänge zu­ sammenziehen kann. Derartige flexible Schläuche mit der für den vorliegenden Anwendungszweck erforderlichen Warmfestig­ keit, Kraftstoff- und Alterungsbeständigkeit sind in der Praxis bekannt und als Handelsware erhältlich. Die Windungen der Spiralfeder 8 liegen bei kürzester Länge direkt aufeinan­ der, so daß im Schlauchinneren eine strömungsgünstige Wand­ oberfläche gegeben ist. Der Schlauch ist aber auch in voll ge­ strecktem Zustand an seiner Innenwandung glatt.The flexible suction lines 6 consist of a spiral reinforced plastic hose. The spiral spring 8 reinforcing the plastic sleeve of the hose is wound in such a way that the hose free of tensile force can contract to its minimum length. Such flexible hoses with the required heat resistance for the present application, fuel and aging resistance are known in practice and are available as commercial goods. The windings of the spiral spring 8 lie directly on one another at the shortest length, so that a streamlined wall surface is provided in the interior of the hose. The hose is also smooth in its fully stretched state on its inner wall.

Die erwünschte Längenänderung der Ansaugleitungen 6 wird in Abhängigkeit des jeweiligen Motorbetriebszustandes durch mo­ torbetriebsabhängige Drehung des Sammelbehälters 3 wie folgt bewirkt.The desired change in length of the intake lines 6 is effected depending on the respective engine operating state by motor operation-dependent rotation of the collecting container 3 as follows.

Bei niedrigen Motordrehzahlen wird der Sammelbehälter 3 so ge­ dreht, daß die Ansaugleitungen 6 an der Außenwandung des Sam­ melbehälters aufgewickelt auf ihre maximale Länge gezogen wer­ den. Bei steigender Motordrehzahl dreht sich der Sammelbehäl­ ter 3 sodann zurück, wobei sich die Ansaugleitungen 6 ent­ sprechend verkürzen, bis sie bei maximaler Drehzahl ihre kür­ zeste, optimale Länge angenommen haben. Die Rotationsbewegung des Sammelbehälters 3 kann durch einen Stellmotor drehzahlab­ hängig gesteuert werden.At low engine speeds, the collecting container 3 is rotated so that the suction lines 6 are wound on the outer wall of the collecting container to their maximum length. With increasing engine speed, the collecting container ter 3 then rotates back, the suction lines 6 shortening accordingly until they have assumed their shortest, optimal length at maximum speed. The rotational movement of the collecting container 3 can be controlled in a speed-dependent manner by a servomotor.

Stromauf jedes Ansaugventiles 7 ist noch vor der Anbindung der flexiblen Ansaugleitung 6 eine Einzel-Drosselklappe 9 vorge­ sehen. Durch diese Drosselklappe 9 wird sichergestellt, daß auch bei geschlossener Drosselklappenstellung die aus flexib­ lem Material bestehenden Ansaugleitungen 6 keinem Unterdruck ausgesetzt werden. Ein solcher Unterdruck könnte insbesondere zu einem radialen Einfallen des flexiblen Kunststoffschlauches der Ansaugleitungen 6 führen und damit die einwandfreie Funk­ tion der Ansaugvorrichtung negativ beeinflussen oder sogar vollständig unmöglich machen.Upstream of each intake valve 7 , a single throttle valve 9 is seen before the flexible intake line 6 is connected. This throttle valve 9 ensures that, even when the throttle valve position is closed, the suction lines 6 made of flexible material are not exposed to negative pressure. Such negative pressure could in particular lead to a radial collapse of the flexible plastic hose of the suction lines 6 and thus negatively influence the proper functioning of the suction device or even make it completely impossible.

Claims (1)

Luftansaugvorrichtung für Brennkraftmaschinen mit radial von einem um seine Achse drehbaren Sammelbehälter zu jedem Zylinder der Brennkraftmaschine abzweigenden stufenlos längenveränder­ baren sich nebeneinanderliegend über einen Teil des Umfange des Sammelbehälters windenden Ansaugleitungen, bei der die wirksame Länge der Ansaugleitungen über die Drehlage des Sammelbehälters einstellbar ist, dadurch gekennzeichnet,
daß die Ansaugleitungen (6) aus ausschließlich in Längsrichtung flexiblen und durch Spiralfedern (8) verstärkten Schläuchen aus Kunststoff bestehen,
daß die flexiblen Ansaugleitungen (6) jeweils tangential in den Sammelbehälter (3) münden,
und daß stromab jeder der flexiblen Ansaugleitungen (6) eine Drosselklappe (9) in den Ansaugkanälen (7) vorgesehen ist.An air intake device for internal combustion engines with radially branching off from a rotating about its axis collecting tank to each cylinder of the engine, stepless length Variegated cash next to one another over part of the circumference of the collecting container winding intake passages in which the effective length of the intake passages can be adjusted by the rotational position of the collecting container, characterized in that ,
that the suction lines ( 6 ) consist exclusively of hoses made of plastic, which are flexible in the longitudinal direction and reinforced by spiral springs ( 8 ),
that the flexible suction lines ( 6 ) each open tangentially into the collecting container ( 3 ),
and that a throttle valve ( 9 ) is provided in the intake ducts ( 7 ) downstream of each of the flexible intake lines ( 6 ).
DE4003492A 1990-02-06 1990-02-06 Air intake for IC engine - has air intake lines extending from rotary manifold to each cylinder Expired - Fee Related DE4003492C1 (en)

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DE4003492A DE4003492C1 (en) 1990-02-06 1990-02-06 Air intake for IC engine - has air intake lines extending from rotary manifold to each cylinder

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Application Number Priority Date Filing Date Title
DE4003492A DE4003492C1 (en) 1990-02-06 1990-02-06 Air intake for IC engine - has air intake lines extending from rotary manifold to each cylinder

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DE4003492C1 true DE4003492C1 (en) 1991-10-02

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29709723U1 (en) 1997-06-04 1997-07-31 Filterwerk Mann & Hummel Gmbh, 71638 Ludwigsburg Flexible hose line
WO1999002827A1 (en) 1997-07-09 1999-01-21 Filterwerk Mann + Hummel Gmbh Air suction device for internal combustion engine
EP1167717A1 (en) * 2000-06-30 2002-01-02 Peugeot Citroen Automobiles SA Intake manifold for an internal combustion engine of a vehicle having an inlet pipe of adjustable length
EP1526261A1 (en) * 2003-10-23 2005-04-27 Ford Global Technologies, LLC, A subsidary of Ford Motor Company Device for the control of a flow in an intake manifold

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57153924A (en) * 1981-03-20 1982-09-22 Hino Motors Ltd Inertia supercharging intake manifold in internal combustion engine
DE8704464U1 (en) * 1987-03-25 1987-05-27 Adam Opel AG, 6090 Rüsselsheim Intake device designed for a piston internal combustion engine
DE3628065A1 (en) * 1986-08-19 1988-02-25 Gerhard Haubenwallner INTAKE PIPE
JPS63212717A (en) * 1987-02-27 1988-09-05 Nissan Motor Co Ltd Multiple throttle type internal combustion engine
DE3825000A1 (en) * 1987-07-24 1989-02-02 Avl Verbrennungskraft Messtech Variable flow IC engine inlet manifold - has helical compartment for each cylinder with length adjusted by altering inlet openings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57153924A (en) * 1981-03-20 1982-09-22 Hino Motors Ltd Inertia supercharging intake manifold in internal combustion engine
DE3628065A1 (en) * 1986-08-19 1988-02-25 Gerhard Haubenwallner INTAKE PIPE
JPS63212717A (en) * 1987-02-27 1988-09-05 Nissan Motor Co Ltd Multiple throttle type internal combustion engine
DE8704464U1 (en) * 1987-03-25 1987-05-27 Adam Opel AG, 6090 Rüsselsheim Intake device designed for a piston internal combustion engine
DE3825000A1 (en) * 1987-07-24 1989-02-02 Avl Verbrennungskraft Messtech Variable flow IC engine inlet manifold - has helical compartment for each cylinder with length adjusted by altering inlet openings

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29709723U1 (en) 1997-06-04 1997-07-31 Filterwerk Mann & Hummel Gmbh, 71638 Ludwigsburg Flexible hose line
WO1999002827A1 (en) 1997-07-09 1999-01-21 Filterwerk Mann + Hummel Gmbh Air suction device for internal combustion engine
DE19729217A1 (en) * 1997-07-09 1999-06-10 Mann & Hummel Filter Air intake device for internal combustion engines
EP1167717A1 (en) * 2000-06-30 2002-01-02 Peugeot Citroen Automobiles SA Intake manifold for an internal combustion engine of a vehicle having an inlet pipe of adjustable length
FR2811019A1 (en) * 2000-06-30 2002-01-04 Peugeot Citroen Automobiles Sa AIR INTAKE MANIFOLD OF AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE COMPRISING AN ADJUSTMENT DUCT OF ADJUSTABLE LENGTH
EP1526261A1 (en) * 2003-10-23 2005-04-27 Ford Global Technologies, LLC, A subsidary of Ford Motor Company Device for the control of a flow in an intake manifold

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