WO2001006103A1 - Tube having a variable intake cross-section - Google Patents

Tube having a variable intake cross-section Download PDF

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Publication number
WO2001006103A1
WO2001006103A1 PCT/EP2000/005444 EP0005444W WO0106103A1 WO 2001006103 A1 WO2001006103 A1 WO 2001006103A1 EP 0005444 W EP0005444 W EP 0005444W WO 0106103 A1 WO0106103 A1 WO 0106103A1
Authority
WO
WIPO (PCT)
Prior art keywords
diaphragm
intake pipe
intake
segments
coil
Prior art date
Application number
PCT/EP2000/005444
Other languages
German (de)
French (fr)
Inventor
Rudolf Leipelt
Rolf Füsser
Thomas Haubold
Original Assignee
Filterwerk Mann+Hummel Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Filterwerk Mann+Hummel Gmbh filed Critical Filterwerk Mann+Hummel Gmbh
Priority to JP2001511296A priority Critical patent/JP2003505637A/en
Priority to EP00943801A priority patent/EP1114243A1/en
Publication of WO2001006103A1 publication Critical patent/WO2001006103A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—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
    • F02M35/10013—Means upstream of the air filter; Connection to the ambient air
    • 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
    • F02M35/10118—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements with variable cross-sections of intake ducts along their length; Venturis; Diffusers
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10301—Flexible, resilient, pivotally or movable parts; Membranes
    • 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
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1222—Flow throttling or guiding by using adjustable or movable elements, e.g. valves, membranes, bellows, expanding or shrinking elements
    • 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
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1227—Flow throttling or guiding by using multiple air intake flow paths, e.g. bypass, honeycomb or pipes opening into an expansion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1244—Intake silencers ; Sound modulation, transmission or amplification using interference; Masking or reflecting sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages
    • F16L55/02709—Throttle passages in the form of perforated plates
    • F16L55/02718—Throttle passages in the form of perforated plates placed transversely

Definitions

  • the invention relates to an intake pipe with a variable intake cross section, which for this purpose has an actuating element driven by an actuator, according to the preamble of patent claim 1.
  • Such pipes are known, for. B. from DE 35 18 684 A1.
  • the aim of using such pipes in the intake area of internal combustion engines is the possibility of narrowing the flow channel below the maximum power of the engine. This use offers the great advantage of minimizing low-frequency components in the intake noise in such a way that the unpleasant cavity resonances in the passenger compartment are avoided.
  • the cross-sectional area of the flow duct on the raw air side should be kept as narrow as possible in adaptation to the operating state. At full power, the air supply to the engine is ensured by opening the pipe cross-section completely. All other operating states permit a narrowing, which is used acoustically.
  • the remaining cross-sectional area is set in proportion to the required air mass flow, so that ideally the same average flow velocity is always present.
  • the narrowing of the pipe cross-section is achieved in the above-mentioned document by a variable wall section which is spring-mounted and the edges of which are connected to the pipe wall via membranes.
  • the wall section can e.g. B. be pressed by springs into the interior of the tube and by applying a vacuum to the by Wall section and the membrane formed cavity are drawn towards the pipe wall.
  • the invention has for its object to provide an intake pipe with an actuator for changing the intake cross section, which is reliable in function and inexpensive to manufacture. This object is solved by the features of claim 1.
  • the actuating element used in the intake pipe according to the invention consists of an orifice which can be moved back and forth by an actuating element and in this way covers individual pipe segments which are each separated from one another by intermediate walls.
  • the pipe segments can be arranged as desired, for. B. as a series of square cross sections in a row.
  • the screen can then be pushed step by step in front of the individual pipe segments.
  • the intake pipe is preferably an air intake connector for the intake tract of an internal combustion engine.
  • a module can be provided just as well, which is installed at other locations on the intake tract of the internal combustion engine.
  • a selective duct shutdown in the intake ducts Realize suction pipe.
  • an integration of the function of the intake pipe into an air-guiding component of the intake tract is conceivable.
  • the main advantages of the intake pipe according to the invention consist in minimizing the moving parts.
  • the individual tube cross sections are formed by several segments and the closure of these tube segments is achieved by a single aperture disc.
  • the dead ends of the intake pipe on the opposite side of the diaphragm can remain open because they are not involved in the flow process in the intake tract because of the partition walls separating the pipe segments.
  • the pipe segments do not have to adjoin each other. This is only to be understood as a measure to save material and installation space. The function is of course also guaranteed if the pipe segments are designed as individual pipes.
  • the diaphragm itself can have a simple, essentially plane geometry, which simplifies its manufacture. Since the sealing surface with which the diaphragm corresponds only consists of the end faces of the partition walls, no great actuating force occurs when the diaphragm is adjusted. The low mass inertia of the component and the low actuating forces contribute to the fact that small actuators with low energy consumption can be used to drive the intake pipe. This results in a weight saving and cost reduction for the intake pipe. The simple geometry of the diaphragm further increases the functional reliability of the assembly, since jamming of the actuating element can be reliably avoided with reasonable effort for the mounting of the diaphragm.
  • the pipe segments are designed as a circle or circular ring segments according to a further embodiment of the invention, there is a particularly material and space-saving variant for the intake pipe.
  • These circular segments then lie on a circular area, so that the volume between the outer wall of the suction pipe and its cross section is optimally selected.
  • the diaphragm can then be rotatably arranged in the center of the circular area comprising the circular segments.
  • the position of the suction pipe then requires a rotary movement that can be generated more easily than a translatory movement of the walls.
  • a rotatably mounted diaphragm it is advantageous to also give it the shape of a segment of a circle. By rotating the diaphragm, it can then either be rotated in front of the front ends of the tube segments or into an area in which no tube segments are arranged. This results in a favorable embodiment, which is designed according to the diaphragm as a semicircular segment of a circle and the tube segments are also arranged in a semicircular manner.
  • the screen can be composed of several segment pieces according to a special embodiment of the invention. These then slide over one another like a lamella by rotating around the center point, thus releasing the various pipe segments one after the other.
  • segment pieces Since the segment pieces must be arranged axially one behind the other in order to be able to be pushed over one another, a variant of the intake pipe which is particularly easy to seal can be created in that the intermediate walls arranged between the pipe segments are arranged in steps on the side of the diaphragm. As a result, the individual segment pieces find a corresponding end face of the intermediate walls during the fanning out on the pipe segment to be closed, which leads to a seal.
  • segment pieces Another possibility of designing the segment pieces provides that there is a ring area in which all the segment pieces lie on one another. These ring areas thus form for the air flow in the intake pipe in the area of the built the outer wall. At the same time, they give the assembly of segment pieces greater stability.
  • the formation of dense outer walls in the ring area of the segment pieces can be combined with the stepped end faces of the intermediate walls.
  • a special embodiment of the invention provides for one of the tube segments to be arranged as a central segment in the middle of the diaphragm. This presupposes that the aperture has an axis of rotation.
  • the central segment can be arranged as a circular cross section around the axis of rotation, so that the full cross section is available regardless of the position of the diaphragm.
  • This has the advantage that in the ring area around the central segment there is greater design freedom for the remaining tube segments.
  • no segment has to remain open in the ring area, which increases the available total cross section of the tube segments, based on the diameter of the diaphragm.
  • the central segment and the associated opening in the orifice can also be arranged eccentrically to the axis of rotation. In this way it can be achieved that depending on the position of the orifice different overlaps between these components and thus a different available flow cross-section can be achieved. In this case, too, a residual cross section in the area of the central segment always remains open.
  • the actuator is advantageous to design as an electric motor. If a stepper motor is selected, there is no need to detect the position of the control element. A toothing can be provided on the axis of rotation of the actuating element, which in cooperation with the pinion of the electric motor results in a positive connection. However, a press connection can also be selected. If a normal electric motor is selected, position detection must be provided in order to reliably set the opening condition of the intake pipe.
  • the actuator also includes a control that regulates the energy supply and regulates for an adjustment of the opening degree of the intake pipe depending on the operating state of the internal combustion engine. According to a further embodiment of the concept of the invention, a partitioned volume is arranged on the intake pipe, which shields the actuator against contamination from the engine compartment.
  • the partitioned volume can be arranged adjacent to the pipe segments in order to achieve a higher rigidity of the intake pipe and to save material.
  • Another possibility for accommodating the electric motor is on the side facing away from the pipe segments in the further course of the intake tract.
  • the integral actuator thus formed can, for. B. realize by providing the diaphragm with permanent magnets and stationary coil bobbins are provided in the housing, which can gradually turn the diaphragm by appropriate control.
  • the coil formers consist of at least one coil. The magnetic effect, which is achieved by the current flow through the coil, can be increased by a magnetizable coil core.
  • the coil formers can also be accommodated in the cover, while the permanent magnets are housed in the housing.
  • this solution is more complex since the power supply for the coils has to be accommodated on a movable component.
  • the diaphragm can be set in a rotary movement by the coil-permanent magnet combination, as well as in a linear movement with a corresponding design.
  • the latter enables the design of sliding panels.
  • a particularly favorable embodiment of the invention can be produced by using two coils which are arranged adjacent to one another, with as many permanent magnets having to be provided as positions for the diaphragm are desired.
  • the permanent magnets are attached in such a way that in the desired positions only one communicates with the magnetic field of the coil body, while the other coil body communicates with an appropriately dimensioned space between the permanent magnets. In this way, the skilful switching of the two bobbins gradually transports the permanent magnets from coil to coil, resulting in intermediate positions between the desired positions.
  • Another variant of the invention provides for at least mounting the actuating element on a bearing cover which can be pushed into the tube opening on one side.
  • actuating element on a bearing cover which can be pushed into the tube opening on one side.
  • other elements such as components of the actuator can also be mounted on the bearing cover. This creates a bandage that is easy to assemble, which contributes to the economy of the tube variants according to the invention.
  • hose connectors are used on the pipe segments, which serve to connect inlet hoses. Due to their flexibility, the hoses can be optimally adapted to the space available in the engine compartment. In addition, the acoustic properties of the intake pipe can be influenced by varying the length of the hose. The intake tract can thus also be adapted to requirements with regard to the sound design.
  • FIG. 1 shows the longitudinal section through an intake pipe with a one-piece cover
  • FIG. 2 shows the section AA according to FIG. 1,
  • FIG. 3 shows the longitudinal section through an intake pipe with a lamellar structure
  • FIG. 4 shows the section BB according to FIG. 3,
  • FIG. 5 shows the schematic spatial representation of an intake pipe with a lamellar structure, the intake cross sections being formed by hoses,
  • FIG. 6 shows the longitudinal section through an intake pipe in a corresponding representation according to FIG. 1, hose connectors according to FIG. 5 being used and the drive being integrated into the panel, FIG.
  • FIG. 7 shows another variant of the drive integrated in the panel, shown in accordance with the detailed view X from FIG. 6,
  • Figure 9 is a tabular representation of the switching sequence for the position
  • FIG. 2 The functioning of the intake manifold shown can best be seen in FIG. 2.
  • the conical course of the tube segments 10 lying within a circular area 25 and having the shape of circular ring segments becomes clear. These are adjacent to one another and are separated from one another by partition walls 26.
  • the diaphragm 15 is gradually pushed over the individual pipe segments 10.
  • the pipe cross section is thus gradually reduced and thus adapted to the air requirement of the internal combustion engine.
  • the actuating element can also assume intermediate states, so that the edge of the opening 16 of one of the tube segments 10 only partially covers.
  • the sealed pipe segments are sealed via a gap s between the cover 15 and end faces 27 of the intermediate walls 26 (see also FIG.
  • FIG. 3 shows an intake pipe in which the control element 14 is composed of segment pieces 28. Similar to the intake pipe described in FIG. 1, the air is passed through pipe segments 10, which can be closed by the individual segment pieces 28.
  • the segment pieces 28 point Ring areas 29, which are provided for stabilizing the assembly forming the actuator 14.
  • the inner sides of the ring area limit the opening 16 left open by the segment pieces 28.
  • the bearing cover 13 serves to fasten the electric motor 19 and has a hollow connector 30 which serves as a bearing for inner ring areas 31 of the segment pieces.
  • the bearing cover forms a fixed cover 32 for one of the pipe segments 10, which is therefore never involved in the air conduction process and is therefore also closed in the area of the intake socket 11.
  • the cover 32 has a stop 33 which limits the rotational movement of the adjacent segment piece such that it can cover one of the tube segments 10, but there is always an overlap between the cover 32 and said segment piece 28.
  • the subsequent segment pieces have similar stops 33, which in the same way ensure an overlap of the respectively adjacent segment pieces regardless of the state of rotation of the actuating element 14.
  • the last of the segment pieces 28 is expanded by a drive hub 34, which is non-positively connected to the drive shaft 35 of the electric motor 19.
  • the drive hub is mounted on a central structure 36, which runs through the entire intake manifold and is closed at the air inlet with an end cap 37.
  • the central structure simultaneously forms wall parts of the tube segments 10.
  • the end faces 27 of the intermediate walls 26 extend into the opening 16 to such an extent that they lead to a direct seal with the associated ring segment 28.
  • the function of the actuator 14 is shown in Figure 4.
  • the section BB (see FIG. 3) is laid out in such a way that it simultaneously represents a top view of the uppermost segment piece. It can be seen how this merges into the ring region 29 on its outer edge.
  • the inner ring area is not recognizable because it is covered by the drive hub 34.
  • Behind the drive hub the end face of the hollow connector 30 can be seen, which belongs to the bearing cap 13.
  • the non-recognizable inner ring regions 31 are mounted on this, which lie exactly behind the cut surface of the drive hub.
  • the drive shaft 35 of the electric motor which cannot be recognized, penetrates the bearing cover 13 centrally.
  • the intake pipe according to FIG. 3 is shown in the fully open state, while the intake pipe according to FIG.
  • segment pieces 28 cover all pipe segments. Cover 32 can also be seen.
  • the degree of overlap 38 is shown in dashed lines between the cover 32 and the adjacent segment piece.
  • the stop 33 of the cover is indicated. This runs in a groove 39 in the segment piece 28. In this way, a defined movement of the segment pieces relative to one another is ensured.
  • FIG. 5 The schematic representation of an intake pipe according to FIG. 5 shows the use of inlet hoses 41 which connect to the pipe segments 10 to form intake sections. As shown in FIGS. 3 and 4, the tube segments are closed or opened by the adjusting element 14. For the attachment of the inlet hoses, hose sockets 40 are provided, which start from the tube segments 10 and can be freely selected, for. B. in the engine compartment of an internal combustion engine.
  • the intake pipe according to FIG. 6 is basically constructed in accordance with the intake pipe shown in FIG.
  • the connection end 12 has the same mounting dimensions.
  • the bearing cover 13 is used, in which the screen 15 is rotatably mounted.
  • the diaphragm is not driven by an electric motor, but has permanent magnets 43 which are driven by coil formers A, B.
  • the coil formers have a coil 44 and an iron core 45. They are attached to the bearing cap 13 together with a control device 46 and are thus fixed to the housing.
  • the coil formers A, B act on the permanent magnets 43 which are fastened in the diaphragm 15.
  • the volume required for the electric motor 19 according to FIG. 1 is used in the intake manifold according to FIG. 6 for a central segment 42, which is open regardless of the position of the diaphragm and represents an additional intake cross section.
  • Central segment 42 and tubular segments 10, as shown in FIG. 5, are designed as hose connectors 40.
  • the attached inlet hoses 41 are also shown.
  • the hose connector 40 of the pipe segment 10 shown has additionally a secondary chamber, which is supplemented by plugging the inlet hose 41 into a ⁇ / 4 tube 47.
  • FIG. 7 shows an alternative drive concept for the intake pipe according to FIG. 6.
  • the magnetic fields that arise are oriented axially and not radially.
  • Only a single permanent magnet 43 is provided, which is mounted in the panel 15.
  • bobbins A, B, C, etc. are mounted on the bearing cover 13.
  • the permanent magnet 43 is passed from coil form to coil form, which causes the diaphragm to rotate.
  • FIG. 8 is a representation of the intake pipe according to FIG. 6, the functional principle of this embodiment being described in more detail here.
  • the pipe segments 10 can be seen, which are to be switched on or off individually by rotating the diaphragm 15.
  • the constantly opened central segment 42 is located in the middle.
  • a hub 48 of the diaphragm is held on the axis of rotation by ribs 49.
  • the permanent magnets 43 are attached in the vicinity of the outer circumference of the diaphragm 15.
  • the north poles N and the south poles S of adjacent permanent magnets alternately point outwards and inwards.
  • the distance between two adjacent permanent magnets is chosen so large that one of the permanent magnets and the other one is assigned to one of the permanent magnets and the other to an intermediate space between the two coil bobbins A, B, which are arranged adjacent to and are not attached to the bearing cover 13.
  • the first permanent magnet which is assigned to the coil former A in accordance with FIG. 8, is considered below. This is in position P1 in the position shown.
  • the mode of operation of the coils for moving the diaphragm 15 is clear from the table in FIG. 9. P1 is shown on the first line.
  • two switching pulses are required for the coil formers, as shown in the second line of the table.
  • the first Switching impulse (see column I in the table) flows through both bobbins in such a way that their south pole faces the permanent magnet.
  • the permanent magnet is repelled relative to the coil former A and at the same time the adjacent permanent magnet is drawn towards the coil former B, as a result of which the diaphragm moves clockwise into the intermediate position Z.
  • a second pulse from the coil body B leads to the second permanent magnet remaining in front of this coil body, as a result of which the diaphragm is fixed in this position. If the current is switched off in the intermediate position Z, the iron core of the coil body remains magnetized. This magnetization is additionally supported by the magnetic field of the permanent magnet. This principle works in all positions P and all intermediate positions Z, since one of the permanent magnets 43 always interacts with one of the coil formers A, B.
  • the impulses 3, 4 bring the diaphragm into position P2, as a result of which the first tube segment 10 is completely closed.
  • the course of the pulses can be seen in FIG. 9.
  • the same pulse pattern is used for the two bobbins A, B, with the only difference that the bobbins A, B are reversed. In this way, the diaphragm can be moved in both directions using two bobbins.
  • the function is comparable to that of a stepper motor.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

The invention relates to an intake tube, especially serving as an air induction tube in the intake tract of an internal combustion engine, which has an aperture that can be shifted in front of individual tube segments (10) that form the total cross-section of the intake tube. The tube segments (10) are separated from one another by partitions (27). The total cross-section of the intake tube can be incrementally reduced in this manner by turning an opening (16). The adjusting element has simple dimensions which permit it to be easily manufactured. A sealing is effected by a gap located between the partitions (27) and the aperture (15) of the adjusting element (14). This results in extremely small adjusting forces for actuating the adjusting element. The adjusting element can be easily driven, for example, by an electric motor.

Description

Rohr mit veränderbarem Ansaugquerschnitt Pipe with variable intake cross-section
Beschreibungdescription
Stand der TechnikState of the art
Die Erfindung betrifft ein Ansaugrohr mit einem veränderbaren Ansaugquerschnitt, welches hierzu ein durch ein Stellorgan angetriebenes Stellelement aufweist, nach der Gattung des Patentanspruches 1.The invention relates to an intake pipe with a variable intake cross section, which for this purpose has an actuating element driven by an actuator, according to the preamble of patent claim 1.
Derartige Rohre sind bekannt, z. B. aus der DE 35 18 684 A1. Ziel der Verwendung solcher Rohre im Ansaugbereich von Verbrennungskraftmaschinen ist die Möglichkeit der Strömungskanalverengung unterhalb der Maximalleistung des Motors. Diese Nutzung bietet den großen Vorteil, Tieftonanteile im Ansauggeräusch derart zu minimieren, daß die unangenehmen Hohlraumresonanzen im Fahrgastinnenraum unterbleiben. Dabei soll der Flächenquerschnitt des rohluftseitigen Strömungskanals in Anpassung an den Betriebszustand möglichst eng gehalten werden. Im Voll- leistungs-Arbeitspunkt wird die Luftzufuhr zum Motor durch eine vollständige Öffnung des Rohrquerschnitts gewährleistet. Alle anderen Betriebszustände gestatten eine Verengung, die akustisch genutzt wird. Der verbleibende Flächenquerschnitt wird proportional zum erforderlichen Luftmassenstrom eingestellt, so daß im Idealfall immer dieselbe mittlere Strömungsgeschwindigkeit vorliegt. Die Verengung des Rohrquerschnitts wird in der obengenannten Schrift durch einen variablen Wandabschnitt erreicht, der federnd gelagert ist und dessen Ränder über Membranen mit der Rohrwand verbunden sind. Der Wandabschnitt kann z. B. durch Federn in das Rohrinneren gedrückt werden und durch Anlegen eines Unterdruckes an den durch den Wandabschnitt und die Membran gebildeten Hohlraum zur Rohrwand hin gezogen werden.Such pipes are known, for. B. from DE 35 18 684 A1. The aim of using such pipes in the intake area of internal combustion engines is the possibility of narrowing the flow channel below the maximum power of the engine. This use offers the great advantage of minimizing low-frequency components in the intake noise in such a way that the unpleasant cavity resonances in the passenger compartment are avoided. The cross-sectional area of the flow duct on the raw air side should be kept as narrow as possible in adaptation to the operating state. At full power, the air supply to the engine is ensured by opening the pipe cross-section completely. All other operating states permit a narrowing, which is used acoustically. The remaining cross-sectional area is set in proportion to the required air mass flow, so that ideally the same average flow velocity is always present. The narrowing of the pipe cross-section is achieved in the above-mentioned document by a variable wall section which is spring-mounted and the edges of which are connected to the pipe wall via membranes. The wall section can e.g. B. be pressed by springs into the interior of the tube and by applying a vacuum to the by Wall section and the membrane formed cavity are drawn towards the pipe wall.
Diese Lösung weist jedoch Nachteile auf. Es läßt sich durch den angelegten Unterdruck der Rohrquerschnitt nicht genau einstellen. Außerdem sind zum Betrieb einer solchen Stelleinrichtung hohe Stellkräfte erforderlich. Schwierigkeiten ergeben sich auch durch den Einsatz der Membran zur Verbindung des veränderlichen Wandabschnittes mit der Rohrwand. Die Membran ist Alterungserscheinungen ausgesetzt. Außerdem läßt sich über die Membran nur ein begrenzter Stellbereich verwirklichen, so daß im Niederdrehzahlbereich ein Abfallen der Strömungsgeschwindigkeit unvermeidbar ist. Im Bereich der Membran ergibt sich durch die wenig definierte Oberflächenform zusätzlich ein unerwünschter Strömungsverlust im Rohr, welcher zu einem Leistungsverlust der Brennkraftmaschine führt.However, this solution has disadvantages. The pipe cross-section cannot be precisely adjusted due to the negative pressure applied. In addition, high actuating forces are required to operate such an actuating device. Difficulties also arise from the use of the membrane to connect the variable wall section to the pipe wall. The membrane is exposed to signs of aging. In addition, only a limited adjustment range can be achieved via the membrane, so that a drop in the flow velocity is unavoidable in the low speed range. In the area of the membrane, the poorly defined surface shape additionally results in an undesirable loss of flow in the tube, which leads to a loss in performance of the internal combustion engine.
Der Erfindung liegt die Aufgabe zugrunde, ein Ansaugrohr mit einem Stellelement zur Veränderung des Ansaugquerschnittes zu schaffen, welches zuverlässig in der Funktion und kostengünstig in der Herstellung ist. Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst.The invention has for its object to provide an intake pipe with an actuator for changing the intake cross section, which is reliable in function and inexpensive to manufacture. This object is solved by the features of claim 1.
Vorteile der ErfindungAdvantages of the invention
Das in dem erfindungsgemäßen Ansaugrohr zur Anwendung kommende Stellelement besteht aus einer Blende, die durch ein Stellorgan hin und her bewegt werden kann und auf diese Weise einzelne Rohrsegmente abdeckt, die jeweils durch Zwischenwände voneinander getrennt sind. Die Rohrsegmente können beliebig angeordnet sein, z. B. als Reihe von quadratischen Querschnitten hintereinander. Die Blende kann dann schrittweise vor die einzelnen Rohrsegmente geschoben werden. Das Ansaugrohr ist bevorzugt ein Luftansaugstutzen für den Ansaugtrakt einer Brennkraftmaschine. Es kann aber genau so gut ein Modul vorgesehen sein, welches an anderen Orten des Ansaugtraktes der Brennkraftmaschine montiert wird. Zum Beispiel ließe sich eine selektive Kanalabschaltung in den Ansaugkanälen ei- nes Saugrohrs verwirklichen. Weiterhin ist eine Integration der Funktion des Ansaugrohres in ein luftführendes Bauteil des Ansaugtraktes denkbar.The actuating element used in the intake pipe according to the invention consists of an orifice which can be moved back and forth by an actuating element and in this way covers individual pipe segments which are each separated from one another by intermediate walls. The pipe segments can be arranged as desired, for. B. as a series of square cross sections in a row. The screen can then be pushed step by step in front of the individual pipe segments. The intake pipe is preferably an air intake connector for the intake tract of an internal combustion engine. However, a module can be provided just as well, which is installed at other locations on the intake tract of the internal combustion engine. For example, a selective duct shutdown in the intake ducts Realize suction pipe. Furthermore, an integration of the function of the intake pipe into an air-guiding component of the intake tract is conceivable.
Die wesentlichen Vorteile des erfindungsgemäßen Ansaugrohrs bestehen in einer Minimierung der beweglichen Teile. Die einzelnen Rohrquerschnitte werden durch mehrere Segmente gebildet und der Verschluß dieser Rohrsegmente wird durch eine einzige Blendenscheibe erzielt. Dabei können die toten Enden des Ansaugrohrs auf der gegenüberliegenden Seite der Blende geöffnet bleiben, da sie wegen der die Rohrsegmente trennenden Zwischenwände am Strömungsprozeß im Ansaugtrakt nicht beteiligt sind. Die Rohrsegmente müssen nicht aneinandergrenzen. Dies ist lediglich als Maßnahme zur Material- und Einbauraumersparnis zu verstehen. Die Funktion ist selbstverständlich auch gewährleistet, wenn die Rohrsegmente als Einzelrohre ausgeführt sind.The main advantages of the intake pipe according to the invention consist in minimizing the moving parts. The individual tube cross sections are formed by several segments and the closure of these tube segments is achieved by a single aperture disc. The dead ends of the intake pipe on the opposite side of the diaphragm can remain open because they are not involved in the flow process in the intake tract because of the partition walls separating the pipe segments. The pipe segments do not have to adjoin each other. This is only to be understood as a measure to save material and installation space. The function is of course also guaranteed if the pipe segments are designed as individual pipes.
Die Blende selbst kann eine einfache, im wesentlichen eben ausgerichtete Geometrie aufweisen, was deren Fertigung vereinfacht. Da die Dichtfläche, mit der die Blende korrespondiert, lediglich aus den Stirnseiten der Zwischenwände besteht, tritt bei der Verstellung der Blende keine große Stellkraft auf. Die geringe Massenträgheit des Bauteils und die geringen Stellkräfte tragen dazu bei, daß zum Antrieb des Ansaugrohres kleine Stellorgane mit geringem Energieverbrauch zur Anwendung kommen können. Dies ergibt eine Gewichtseinsparung sowie Kostenreduzierung für das Ansaugrohr. Durch die einfache Geometrie der Blende wird weiterhin die Funktionszuverlässigkeit der Baugruppe erhöht, da bei vertretbarem Aufwand für die Lagerung der Blende ein Verklemmen des Stellelementes zuverlässig vermieden werden kann.The diaphragm itself can have a simple, essentially plane geometry, which simplifies its manufacture. Since the sealing surface with which the diaphragm corresponds only consists of the end faces of the partition walls, no great actuating force occurs when the diaphragm is adjusted. The low mass inertia of the component and the low actuating forces contribute to the fact that small actuators with low energy consumption can be used to drive the intake pipe. This results in a weight saving and cost reduction for the intake pipe. The simple geometry of the diaphragm further increases the functional reliability of the assembly, since jamming of the actuating element can be reliably avoided with reasonable effort for the mounting of the diaphragm.
Werden die Rohrsegmente gemäß einer weiteren Ausführungsform der Erfindung als Kreis oder Kreisringsegmente ausgebildet, ergibt sich eine besonders material- und platzsparende Variante für das Ansaugrohr. Diese Kreissegmente liegen dann auf einer Kreisfläche, so daß das Volumen zwischen Außenwand des Ansaugrohrs und dessen Querschnitt optimal gewählt ist. Die Blende kann dann drehbar im Mittelpunkt der die Kreissegmente umfassenden Kreisfläche angeordnet werden. Zur Ver- Stellung des Ansaugrohrs ist dann eine Drehbewegung notwendig, die einfacher als eine translatorische Bewegung der Wände erzeugt werden kann.If the pipe segments are designed as a circle or circular ring segments according to a further embodiment of the invention, there is a particularly material and space-saving variant for the intake pipe. These circular segments then lie on a circular area, so that the volume between the outer wall of the suction pipe and its cross section is optimally selected. The diaphragm can then be rotatably arranged in the center of the circular area comprising the circular segments. For sale The position of the suction pipe then requires a rotary movement that can be generated more easily than a translatory movement of the walls.
Wird eine drehbar gelagerte Blende gewählt, so ist es vorteilhaft, dieser ebenfalls die Form eines Kreissegmentes zu verleihen. Durch Drehung der Blende kann diese dann entweder vor die stirnseitigen Enden der Rohrsegmente gedreht werden oder in einen Bereich, in denen keine Rohrsegmente angeordnet sind. Hieraus ergibt sich eine günstige Ausführungsform, der gemäß die Blende als halbkreisförmiges Kreissegment ausgebildet ist und die Rohrsegmente ebenfalls halbkreisförmig angeordnet sind.If a rotatably mounted diaphragm is selected, it is advantageous to also give it the shape of a segment of a circle. By rotating the diaphragm, it can then either be rotated in front of the front ends of the tube segments or into an area in which no tube segments are arranged. This results in a favorable embodiment, which is designed according to the diaphragm as a semicircular segment of a circle and the tube segments are also arranged in a semicircular manner.
Um einen größeren als halbkreisförmigen Stellbereich zu ermöglichen, kann gemäß einer besonderen Ausgestaltung der Erfindung die Blende aus mehreren Segmentstücken zusammengesetzt sein. Diese schieben sich dann durch Drehung um den Mittelpunkt lamellenartig übereinander und geben so nacheinander die verschiedenen Rohrsegmente frei. Werden bei dieser Lösung z. B. acht Rohrsegmente mit gleicher Geometrie im Kreisumfang angeordnet, so ergibt sich bei voll geöffneter Blende ein Gesamtquerschnitt des Ansaugrohres, welches aus sieben gleichen Teilen besteht. Der achte Teil ist durch die zusammengeschobenen Segmentstücke verdeckt. Durch Verstellen der Segmentstücke können die sieben restlichen Rohrsegmente schrittweise verschlossen werden.In order to enable a larger than semicircular adjustment range, the screen can be composed of several segment pieces according to a special embodiment of the invention. These then slide over one another like a lamella by rotating around the center point, thus releasing the various pipe segments one after the other. Are z. B. eight pipe segments with the same geometry arranged in the circumference, this results in a full cross section of the intake pipe, which consists of seven identical parts when the diaphragm is fully open. The eighth part is covered by the segment pieces pushed together. By adjusting the segment pieces, the seven remaining tube segments can be closed step by step.
Da die Segmentstücke axial hintereinander angeordnet sein müssen, um sich über- einanderschieben zu lassen, kann eine besonders einfach abzudichtende Variante des Ansaugrohrs dadurch geschaffen werden, daß die zwischen den Rohrsegmenten angeordneten Zwischenwände auf der Seite der Blende gestuft angeordnet sind. Dadurch finden die einzelnen Segmentstücke während des Auffächerns auf dem jeweils zu verschließenden Rohrsegment eine korrespondierende Stirnfläche der Zwischenwände, die zu einer Abdichtung führt.Since the segment pieces must be arranged axially one behind the other in order to be able to be pushed over one another, a variant of the intake pipe which is particularly easy to seal can be created in that the intermediate walls arranged between the pipe segments are arranged in steps on the side of the diaphragm. As a result, the individual segment pieces find a corresponding end face of the intermediate walls during the fanning out on the pipe segment to be closed, which leads to a seal.
Eine andere Möglichkeit der Gestaltung der Segmentstücke sieht vor, daß es einen Ringbereich gibt, in dem alle Segmentstücke aufeinander liegen. Diese Ringbereiche bilden also für die Luftströmung im Ansaugrohr im Bereich der lamellenartig aufge- bauten Blende die Außenwand. Gleichzeitig verleihen sie dem Verbund von Segmentstücken eine größere Stabilität. Die Bildung dichter Außenwände im Ringbereich der Segmentstücke kann mit den gestuften Stirnseiten der Zwischenwände kombiniert werden.Another possibility of designing the segment pieces provides that there is a ring area in which all the segment pieces lie on one another. These ring areas thus form for the air flow in the intake pipe in the area of the built the outer wall. At the same time, they give the assembly of segment pieces greater stability. The formation of dense outer walls in the ring area of the segment pieces can be combined with the stepped end faces of the intermediate walls.
Eine besondere Ausgestaltungsform der Erfindung sieht vor, eines der Rohrsegmente als Zentralsegment in der Mitte der Blende anzuordnen. Dies setzt voraus, daß die Blende eine Drehachse aufweist. Das Zentralsegment kann als Kreisquerschnitt um die Drehachse angeordnet werden, wodurch der volle Querschnitt unabhängig von der Stellung der Blende zur Verfügung steht. Dies hat den Vorteil, daß im Ringbereich um das Zentralsegment ein größerer Gestaltungsspielraum für die restlichen Rohrsegmente entsteht. Zudem muß im Ringbereich kein Segment geöffnet bleiben, was den verfügbaren Gesamtquerschnitt der Rohrsegmente, bezogen auf den Durchmesser der Blende vergrößert.A special embodiment of the invention provides for one of the tube segments to be arranged as a central segment in the middle of the diaphragm. This presupposes that the aperture has an axis of rotation. The central segment can be arranged as a circular cross section around the axis of rotation, so that the full cross section is available regardless of the position of the diaphragm. This has the advantage that in the ring area around the central segment there is greater design freedom for the remaining tube segments. In addition, no segment has to remain open in the ring area, which increases the available total cross section of the tube segments, based on the diameter of the diaphragm.
Das Zentralsegment und die zugehörige Öffnung in der Blende können jedoch auch exzentrisch zur Drehachse angeordnet sein.. Hierdurch läßt sich erreichen, daß abhängig von der Stellung der Blende unterschiedliche Überdeckungen zwischen diesen Bauteilen und damit ein unterschiedlicher verfügbarer Durchströmungsquerschnitt erreicht werden kann. Auch in diesem Fall bleibt ein Restquerschnitt im Bereich des Zentralsegments immer geöffnet.However, the central segment and the associated opening in the orifice can also be arranged eccentrically to the axis of rotation. In this way it can be achieved that depending on the position of the orifice different overlaps between these components and thus a different available flow cross-section can be achieved. In this case, too, a residual cross section in the area of the central segment always remains open.
Es ist vorteilhaft, das Stellorgan als Elektromotor auszuführen. Wird ein Schrittmotor gewählt, entfällt die Notwendigkeit einer Lageerkennung des Stellelementes. Auf der Drehachse des Stellelementes kann eine Verzahnung vorgesehen werden, die im Zusammenwirkung mit dem Ritzel des Elektromotors eine formschlüssige Verbindung ergibt. Es kann aber genauso eine Preßverbindung gewählt werden. Wird ein normaler Elektromotor gewählt, so muß eine Lageerkennung vorgesehen sein, um den Öffnungszustand des Ansaugrohres zuverlässig einzustellen. Das Stellorgan umfaßt weiterhin eine Ansteuerung, die die Energiezufuhr regelt sowie für eine Anpassung des Öffnungsgrades des Ansaugrohres abhängig vom Betriebszustand der Brennkraftmaschine regelt. Gemäß einer weiteren Ausgestaltung des Erfindungsgedankens ist am Ansaugrohr ein abgeteiltes Volumen angeordnet, welches das Stellorgan gegen Verschmutzung aus dem Motorraum abschirmt. Hier können sowohl der Elektromotor als auch die Ansteuerung untergebracht werden. Das abgeteilte Volumen kann den Rohrsegmenten benachbart angeordnet werden, um eine höhere Steifigkeit des Ansaugrohrs zu erzielen sowie Material einzusparen. Eine andere Möglichkeit der Unterbringung des Elektromotors besteht auf der den Rohrsegmenten abgekehrten Seite im weiteren Verlauf des Ansaugtrakts.It is advantageous to design the actuator as an electric motor. If a stepper motor is selected, there is no need to detect the position of the control element. A toothing can be provided on the axis of rotation of the actuating element, which in cooperation with the pinion of the electric motor results in a positive connection. However, a press connection can also be selected. If a normal electric motor is selected, position detection must be provided in order to reliably set the opening condition of the intake pipe. The actuator also includes a control that regulates the energy supply and regulates for an adjustment of the opening degree of the intake pipe depending on the operating state of the internal combustion engine. According to a further embodiment of the concept of the invention, a partitioned volume is arranged on the intake pipe, which shields the actuator against contamination from the engine compartment. Both the electric motor and the control can be accommodated here. The partitioned volume can be arranged adjacent to the pipe segments in order to achieve a higher rigidity of the intake pipe and to save material. Another possibility for accommodating the electric motor is on the side facing away from the pipe segments in the further course of the intake tract.
Eine andere vorteilhafte Variante für das Stellorgan ergibt sich, wenn dieses als integrale Baugruppe ausgeführt ist, welche die Blende enthält. Hierdurch lassen sich Gewicht für das Ansaugrohr und Kosten für dessen Herstellung sparen. Das so gebildete integrale Stellorgan läßt sich z. B. verwirklichen, indem die Blende mit Permanentmagneten versehen wird und ortsfest im Gehäuse Spulenkörper vorgesehen werden, die durch eine entsprechende Ansteuerung die Blende schrittweise verdrehen können. Die Spulenkörper bestehen zumindest aus einer Spule. Die magnetische Wirkung, die durch den Stromdurchfluß der Spule erreicht wird, kann durch einen magnetisierbaren Spulenkern erhöht werden.Another advantageous variant for the actuator results if it is designed as an integral assembly that contains the diaphragm. This saves weight for the intake pipe and costs for its manufacture. The integral actuator thus formed can, for. B. realize by providing the diaphragm with permanent magnets and stationary coil bobbins are provided in the housing, which can gradually turn the diaphragm by appropriate control. The coil formers consist of at least one coil. The magnetic effect, which is achieved by the current flow through the coil, can be increased by a magnetizable coil core.
Es ist vorteilhaft, die Ansteuerung der Spulenkörper derart auszuführen, daß diese in beide Richtungen durchströmt werden können. Hierdurch läßt sich eine Polumkehr des durch die Spulenkörper realisierten Elektromagneten erzeugen, wodurch dieselben Spulen für eine Verstellung der Blende in beide Richtungen benutzt werden können.It is advantageous to control the coil formers in such a way that they can flow through in both directions. In this way, a polarity reversal of the electromagnet realized by the coil bodies can be generated, as a result of which the same coils can be used for adjusting the diaphragm in both directions.
Selbstverständlich lassen sich die Spulenkörper auch in der Blende unterbringen, während die Permanentmagnete im Gehäuse untergebracht werden. Diese Lösung ist jedoch aufwendiger, da die Stromversorgung für die Spulen an einem beweglichen Bauteil untergebracht werden muß.Of course, the coil formers can also be accommodated in the cover, while the permanent magnets are housed in the housing. However, this solution is more complex since the power supply for the coils has to be accommodated on a movable component.
Die Blende kann durch die Spulen-Permanentmagnet-Kombination sowohl in eine Drehbewegung versetzt werden, als auch bei entsprechender Gestaltung in eine Linearbewegung. Letzteres ermöglicht die Gestaltung von Schiebeblenden. Durch Verwendung von zwei Spulen, die einander benachbart angebracht sind, läßt sich eine besonders günstige Ausführungsform der Erfindung erzeugen, wobei so viele Permanentmagnete vorgesehen werden müssen, wie Stellungen für die Blende gewünscht sind. Die Permanentmagneten werden derart angebracht, daß in den gewünschten Stellungen jeweils nur einer mit dem Magnetfeld des Spulenkörpers kommuniziert, während der andere Spulenkörper mit einem entsprechend dimensionierten Zwischenraum zwischen den Permanentmagneten kommuniziert. Auf diese Weise werden durch geschickte Schaltung der beiden Spulenkörper die Permanentmagnete schrittweise von Spule zu Spule transportiert, wobei sich Zwischenstellungen zwischen den gewünschten Positionen ergeben.The diaphragm can be set in a rotary movement by the coil-permanent magnet combination, as well as in a linear movement with a corresponding design. The latter enables the design of sliding panels. A particularly favorable embodiment of the invention can be produced by using two coils which are arranged adjacent to one another, with as many permanent magnets having to be provided as positions for the diaphragm are desired. The permanent magnets are attached in such a way that in the desired positions only one communicates with the magnetic field of the coil body, while the other coil body communicates with an appropriately dimensioned space between the permanent magnets. In this way, the skilful switching of the two bobbins gradually transports the permanent magnets from coil to coil, resulting in intermediate positions between the desired positions.
Eine weitere Variante der Erfindung sieht vor, zumindest das Stellelement auf einem Lagerdeckel zu montieren, der einseitig in die Rohröffnung geschoben werden kann. Selbstverständlich können auch weitere Elemente wie Komponenten des Stellorgans an den Lagerdeckel montiert werden. Es entsteht dabei ein Verband, der einfach montierbar ist, was zur Wirtschaftlichkeit der erfindungsgemäßen Rohrvarianten beiträgt.Another variant of the invention provides for at least mounting the actuating element on a bearing cover which can be pushed into the tube opening on one side. Of course, other elements such as components of the actuator can also be mounted on the bearing cover. This creates a bandage that is easy to assemble, which contributes to the economy of the tube variants according to the invention.
Eine vorteilhafte Ausbildung der Erfindung ergibt sich, wenn an den Rohrsegmenten Schlauchstutzen angebracht werden, die zur Anbindung von Einlaßschläuchen dienen. Die Schläuche können aufgrund ihrer Flexibilität optimal an die Platzverhältnisse im Motorraum angepaßt werden. Außerdem lassen sich die akustischen Eigenschaften des Ansaugrohres durch Variation der Schlauchlänge beeinflussen. Der Ansaugtrakt läßt sich somit auch an Anforderungen hinsichtlich des Sound-Designs anpassen.An advantageous embodiment of the invention results when hose connectors are used on the pipe segments, which serve to connect inlet hoses. Due to their flexibility, the hoses can be optimally adapted to the space available in the engine compartment. In addition, the acoustic properties of the intake pipe can be influenced by varying the length of the hose. The intake tract can thus also be adapted to requirements with regard to the sound design.
Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird. ZeichnungThese and further features of preferred developments of the invention are evident from the claims and also from the description and the drawings, the individual features being implemented individually or in groups in the form of subcombinations in the embodiment of the invention and in other fields, and can represent advantageous and protectable versions for which protection is claimed here. drawing
Weitere Einzelheiten der Erfindung werden in den Zeichnungen anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigenFurther details of the invention are described in the drawings using schematic exemplary embodiments. Show here
Figur 1 den Längsschnitt durch ein Ansaugrohr mit einteiliger Blende,FIG. 1 shows the longitudinal section through an intake pipe with a one-piece cover,
Figur 2 den Schnitt A - A gemäß Figur 1 ,FIG. 2 shows the section AA according to FIG. 1,
Figur 3 den Längsschnitt durch ein Ansaugrohr mit lamellenförmig aufgebauter Blende,FIG. 3 shows the longitudinal section through an intake pipe with a lamellar structure,
Figur 4 den Schnitt B - B gemäß Figur 3,FIG. 4 shows the section BB according to FIG. 3,
Figur 5 die schematische räumliche Darstellung eines Ansaugrohrs mit lamellenförmig aufgebauter Blende, wobei die Ansaugquerschnitte durch Schläuche gebildet sind,FIG. 5 shows the schematic spatial representation of an intake pipe with a lamellar structure, the intake cross sections being formed by hoses,
Figur 6 den Längsschnitt durch ein Ansaugrohr in entsprechender Darstellung nach Figur 1 , wobei Schlauchstutzen entsprechend Figur 5 zur Anwendung kommen und der Antrieb in die Blende integriert ist,6 shows the longitudinal section through an intake pipe in a corresponding representation according to FIG. 1, hose connectors according to FIG. 5 being used and the drive being integrated into the panel, FIG.
Figur 7 eine andere Variante des in die Blende integrierten Antriebs, dargestellt entsprechend der Detailansicht X aus Figur 6,FIG. 7 shows another variant of the drive integrated in the panel, shown in accordance with the detailed view X from FIG. 6,
Figur 8 den Schnitt C - C gemäß Figur 6 und8 shows the section C - C according to Figure 6 and
Figur 9 eine tabellarische Darstellung der Schaltfolge für die PositionFigure 9 is a tabular representation of the switching sequence for the position
P1 , Z und P2 entsprechend Figur 8. Beschreibung der AusführungsbeispieleP1, Z and P2 according to FIG. 8. Description of the embodiments
Das Ansaugrohr gemäß Figur 1 weist Rohrsegmente 10 (s. auch Figur 2) auf, durch die die Ansaugluft, ausgehend von einem Ansaugstutzen 11 , zu einem Anschlußende 12 des Ansaugrohrs transportiert wird. Die Ansaugluft passiert dabei auch einen Lagerdeckel 13, der zur Aufnahme eines Stellelementes 14 in die anschlußseitige Rohrwandung eingebracht ist. Das Stellelement selbst besitzt einen Kreisquerschnitt und ist im Zentrum des Lagerdeckels 13 gelagert. Die eine Hälfte des Stellelementes ist als Blende 15 ausgeführt, während die andere Hälfte des Stellelementes eine im wesentlichen halbkreisförmige Öffnung 16 aufweist. Über Stege 17 ist das Stellelement 14 mit einem Ritzel 18 eines Elektromotors 19 verbunden, so daß dessen Drehbewegung auf das Stellelement übertragen wird. Der Elektromotor ist in einem abgeteilten Volumen 20 untergebracht und wird durch nicht dargestellte Elektrokabel versorgt, die durch eine Durchführung 21 gesteckt werden. Zusammen mit einer Ansteuerung 22 bildet der Elektromotor das Stellorgan 23.The intake pipe according to FIG. 1 has pipe segments 10 (see also FIG. 2) through which the intake air, starting from an intake port 11, is transported to a connection end 12 of the intake pipe. The intake air also passes through a bearing cover 13 which is inserted into the pipe wall on the connection side in order to accommodate an actuating element 14. The control element itself has a circular cross section and is mounted in the center of the bearing cover 13. One half of the actuating element is designed as an aperture 15, while the other half of the actuating element has an essentially semicircular opening 16. The control element 14 is connected to a pinion 18 of an electric motor 19 via webs 17, so that its rotational movement is transmitted to the control element. The electric motor is housed in a partitioned volume 20 and is supplied by electrical cables, not shown, which are inserted through a bushing 21. Together with a control 22, the electric motor forms the actuator 23.
Die Funktionsweise des dargestellten Ansaugstutzens läßt sich am besten der Figur 2 entnehmen. Hier wird der konische Verlauf der innerhalb einer Kreisfläche 25 liegenden und die Form von Kreisringsegmenten aufweisenden Rohrsegmente 10 deutlich. Diese sind einander benachbart und werden durch Zwischenwände 26 voneinander getrennt. Durch Drehung des Stellelementes 14 schiebt sich die Blende 15 nach und nach über die einzelnen Rohrsegmente 10. Damit wird der Rohrquerschnitt schrittweise verkleinert und somit dem Luftbedarf der Brennkraftmaschine angepaßt. Sofern gewünscht, kann das Stellelement auch Zwischenzustände einnehmen, so daß der Rand der Öffnung 16 eines der Rohrsegmente 10 nur teilweise abdeckt. Die Abdichtung der verschlossenen Rohrsegmente erfolgt über einen Spalt s zwischen der Blende 15 und Stirnseiten 27 der Zwischenwände 26 (s. auch FigurThe functioning of the intake manifold shown can best be seen in FIG. 2. Here the conical course of the tube segments 10 lying within a circular area 25 and having the shape of circular ring segments becomes clear. These are adjacent to one another and are separated from one another by partition walls 26. By rotating the control element 14, the diaphragm 15 is gradually pushed over the individual pipe segments 10. The pipe cross section is thus gradually reduced and thus adapted to the air requirement of the internal combustion engine. If desired, the actuating element can also assume intermediate states, so that the edge of the opening 16 of one of the tube segments 10 only partially covers. The sealed pipe segments are sealed via a gap s between the cover 15 and end faces 27 of the intermediate walls 26 (see also FIG
1 )-1 )-
In Figur 3 ist ein Ansaugrohr dargestellt, in dem das Stellelement 14 aus Segmentstücken 28 zusammengesetzt ist. Ähnlich wie bei dem in Figur 1 beschriebenen Ansaugrohr wird die Luft durch Rohrsegmente 10 geleitet, die durch die einzelnen Segmentstücke 28 verschlossen werden können. Die Segmentstücke 28 weisen Ringbereiche 29 auf, die zur Stabilisierung des das Stellorgan 14 bildenden Verbandes vorgesehen sind. Außerdem begrenzen die Innenseiten des Ringbereiches die durch die Segmentstücke 28 freigelassene Öffnung 16. Der Lagerdeckel 13 dient der Befestigung des Elektromotors 19 und weist einen Hohlstutzen 30 auf, der als Lagerung für Innenringbereiche 31 der Segmentstücke dient. Gleichzeitig bildet der Lagerdeckel eine feststehende Abdeckung 32 für eines der Rohrsegmente 10, welches somit am Luftleitungsprozeß nie beteiligt ist und daher auch im Bereich des Ansaugstutzens 11 verschlossen ist. Die Abdeckung 32 weist einen Anschlag 33 auf, der die Drehbewegung des angrenzenden Segmentstückes derart begrenzt, daß dieses eines der Rohrsegmente 10 verdecken kann, jedoch immer eine Überlappung zwischen der Abdeckung 32 und besagtem Segmentstück 28 besteht. Die nachfolgenden Segmentstücke weisen gleichartige Anschläge 33 auf, die in gleicher weise eine Überlappung der jeweils benachbarten Segmentstücke unabhängig vom Verdrehungszustand des Stellelementes 14 gewährleisten. Das letzte der Segmentstücke 28 ist um eine Antriebsnabe 34 erweitert, welche mit der Antriebswelle 35 des Elektromotors 19 in kraftschlüssiger Verbindung steht. Gleichzeitig ist die Antriebsnabe auf einer Zentralstruktur 36 gelagert, die den gesamten Ansaugstutzen durchläuft und am Lufteinlaß mit einer Endkappe 37 verschlossen ist. Die Zentralstruktur bildet gleichzeitig Wandteile der Rohrsegmente 10. Die Stirnseiten 27 der Zwischenwände 26 reichen je nach Lage des zugehörigen Rohrsegmentes soweit in die Öffnung 16 hinein, daß sie zu einer direkten Abdichtung mit dem zugehörigen Ringsegment 28 führen.FIG. 3 shows an intake pipe in which the control element 14 is composed of segment pieces 28. Similar to the intake pipe described in FIG. 1, the air is passed through pipe segments 10, which can be closed by the individual segment pieces 28. The segment pieces 28 point Ring areas 29, which are provided for stabilizing the assembly forming the actuator 14. In addition, the inner sides of the ring area limit the opening 16 left open by the segment pieces 28. The bearing cover 13 serves to fasten the electric motor 19 and has a hollow connector 30 which serves as a bearing for inner ring areas 31 of the segment pieces. At the same time, the bearing cover forms a fixed cover 32 for one of the pipe segments 10, which is therefore never involved in the air conduction process and is therefore also closed in the area of the intake socket 11. The cover 32 has a stop 33 which limits the rotational movement of the adjacent segment piece such that it can cover one of the tube segments 10, but there is always an overlap between the cover 32 and said segment piece 28. The subsequent segment pieces have similar stops 33, which in the same way ensure an overlap of the respectively adjacent segment pieces regardless of the state of rotation of the actuating element 14. The last of the segment pieces 28 is expanded by a drive hub 34, which is non-positively connected to the drive shaft 35 of the electric motor 19. At the same time, the drive hub is mounted on a central structure 36, which runs through the entire intake manifold and is closed at the air inlet with an end cap 37. The central structure simultaneously forms wall parts of the tube segments 10. Depending on the position of the associated tube segment, the end faces 27 of the intermediate walls 26 extend into the opening 16 to such an extent that they lead to a direct seal with the associated ring segment 28.
Die Funktion des Stellorgans 14 ist der Figur 4 zu entnehmen. Der Schnitt B - B (vergl. Figur 3) ist derart gelegt, daß er gleichzeitig eine Aufsicht auf das oberste Segmentstück darstellt. Es ist erkennbar, wie dieses an seinem Außenrand in den Ringbereich 29 übergeht. Der Innenringbereich ist nicht erkennbar, weil dieser von der Antriebsnabe 34 verdeckt ist. Hinter der Antriebsnabe ist die Stirnseite des Hohlstutzens 30 erkennbar, der zum Lagerdeckel 13 gehört. Auf diesem sind die nicht erkennbaren Innenringbereiche 31 (s. Figur 3) gelagert, die genau hinter der Schnittfläche der Antriebsnabe liegen. Die Antriebswelle 35 des nicht erkennbaren Elektromotors durchstößt den Lagerdeckel 13 zentral. Das Ansaugrohr gemäß Figur 3 ist in voll geöffnetem Zustand dargestellt, während das Ansaugrohr gemäß Figur 4 in vollständig geschlossenem Zustand dargestellt ist. Die Segmentstücke 28 verdecken sämtliche Rohrsegmente. Weiterhin ist die Abdeckung 32 zu erkennen. Zwischen der Abdeckung 32 und dem angrenzenden Segmentstück ist der Überlappungsgrad 38 gestrichelt eingezeichnet. Weiterhin ist der Anschlag 33 der Abdeckung angedeutet. Dieser verläuft in einer Nut 39 im Segmentstück 28. Auf diese Weise ist eine definierte Bewegung der Segmentstücke zueinander gewährleistet.The function of the actuator 14 is shown in Figure 4. The section BB (see FIG. 3) is laid out in such a way that it simultaneously represents a top view of the uppermost segment piece. It can be seen how this merges into the ring region 29 on its outer edge. The inner ring area is not recognizable because it is covered by the drive hub 34. Behind the drive hub, the end face of the hollow connector 30 can be seen, which belongs to the bearing cap 13. The non-recognizable inner ring regions 31 (see FIG. 3) are mounted on this, which lie exactly behind the cut surface of the drive hub. The drive shaft 35 of the electric motor, which cannot be recognized, penetrates the bearing cover 13 centrally. The intake pipe according to FIG. 3 is shown in the fully open state, while the intake pipe according to FIG. 4 is shown in the fully closed state. The segment pieces 28 cover all pipe segments. Cover 32 can also be seen. The degree of overlap 38 is shown in dashed lines between the cover 32 and the adjacent segment piece. Furthermore, the stop 33 of the cover is indicated. This runs in a groove 39 in the segment piece 28. In this way, a defined movement of the segment pieces relative to one another is ensured.
Die schematische Darstellung eines Ansaugrohres gemäß Figur 5 zeigt die Verwendung von Einlaßschläuchen 41 , die sich an die Rohrsegmente 10 zur Bildung von Ansaugstrecken anschließen. Die Rohrsegmente werden, wie in Figur 3 und 4 gezeigt, durch das Stellelement 14 verschlossen oder geöffnet. Zur Befestigung der Einlaßschläuche sind Schlauchstutzen 40 vorgesehen, die von den Rohrsegmenten 10 ausgehen und nach freier Wahl z. B. im Motorraum eines Verbrennungsmotors verlegt werden können.The schematic representation of an intake pipe according to FIG. 5 shows the use of inlet hoses 41 which connect to the pipe segments 10 to form intake sections. As shown in FIGS. 3 and 4, the tube segments are closed or opened by the adjusting element 14. For the attachment of the inlet hoses, hose sockets 40 are provided, which start from the tube segments 10 and can be freely selected, for. B. in the engine compartment of an internal combustion engine.
Das Ansaugrohr gemäß Figur 6 ist grundsätzlich entsprechend dem in Figur 1 dargestellten Ansaugrohr aufgebaut. Das Anschlußende 12 weist dieselben Anbaumaße auf. Weiterhin wird der Lagerdeckel 13 verwendet, in dem die Blende 15 drehbar gelagert ist. Allerdings wird die Blende nicht durch einen Elektromotor angetrieben, sondern weist Permanentmagnete 43 auf, die von Spulenkörpern A, B angetrieben werden. Die Spulenkörper weisen eine Spule 44 und einen Eisenkern 45 auf. Sie sind zusammen mit einem Steuergerät 46 am Lagerdeckel 13 befestigt und somit gehäusefest. Die Spulenkörper A, B wirken auf die Permanentmagnete 43, die in der Blende 15 befestigt sind.The intake pipe according to FIG. 6 is basically constructed in accordance with the intake pipe shown in FIG. The connection end 12 has the same mounting dimensions. Furthermore, the bearing cover 13 is used, in which the screen 15 is rotatably mounted. However, the diaphragm is not driven by an electric motor, but has permanent magnets 43 which are driven by coil formers A, B. The coil formers have a coil 44 and an iron core 45. They are attached to the bearing cap 13 together with a control device 46 and are thus fixed to the housing. The coil formers A, B act on the permanent magnets 43 which are fastened in the diaphragm 15.
Das für den Elektromotor 19 benötigte Volumen gemäß Figur 1 wird in dem Saugrohr gemäß Figur 6 für ein Zentralsegment 42 verwendet, welches unabhängig von der Stellung der Blende geöffnet ist und einen zusätzlichen Ansaugquerschnitt darstellt. Zentralsegment 42 und Rohrsegmente 10 sind, wie in Figur 5 dargestellt, als Schlauchstutzen 40 ausgeführt. Die aufgesteckten Einlaßschläuche 41 sind ebenfalls dargestellt. Der Schlauchstutzen 40 des dargestellten Rohrsegmentes 10 weist zusätzlich eine Nebenkammer auf, die durch Aufstecken des Einlaßschlauches 41 zu einem λ/4-Rohr 47 ergänzt wird.The volume required for the electric motor 19 according to FIG. 1 is used in the intake manifold according to FIG. 6 for a central segment 42, which is open regardless of the position of the diaphragm and represents an additional intake cross section. Central segment 42 and tubular segments 10, as shown in FIG. 5, are designed as hose connectors 40. The attached inlet hoses 41 are also shown. The hose connector 40 of the pipe segment 10 shown has additionally a secondary chamber, which is supplemented by plugging the inlet hose 41 into a λ / 4 tube 47.
Figur 7 stellt ein alternatives Antriebskonzept für das Ansaugrohr gemäß Figur 6 dar. Die entstehenden Magnetfelder sind im Unterschied zu der in Figur 6 dargestellten Variante axial und nicht radial ausgerichtet. Es ist nur ein einziger Permanentmagnet 43 vorgesehen, der in der Blende 15 montiert ist. Entsprechend der Anzahl der gewünschten Stellungen der Blende werden Spulenkörper A, B, C usw. an dem Lagerdeckel 13 montiert. Durch eine entsprechende Ansteuerung der Spulen wird der Permanentmagnet 43 von Spulenkörper zu Spulenkörper gereicht, wodurch eine Drehung der Blende hervorgerufen wird.FIG. 7 shows an alternative drive concept for the intake pipe according to FIG. 6. In contrast to the variant shown in FIG. 6, the magnetic fields that arise are oriented axially and not radially. Only a single permanent magnet 43 is provided, which is mounted in the panel 15. Depending on the number of desired positions of the diaphragm, bobbins A, B, C, etc. are mounted on the bearing cover 13. By correspondingly controlling the coils, the permanent magnet 43 is passed from coil form to coil form, which causes the diaphragm to rotate.
Figur 8 ist eine Darstellung des Ansaugrohres gemäß Figur 6, wobei hieran das Funktionsprinzip dieser Ausführungsform näher beschrieben werden soll. Zu erkennen sind die Rohrsegmente 10, die einzeln durch Drehung der Blende 15 ab- oderzugeschaltet werden sollen. In der Mitte befindet sich das konstant geöffnete Zentralsegment 42. Eine Nabe 48 der Blende wird durch Rippen 49 auf der Drehachse gehalten.FIG. 8 is a representation of the intake pipe according to FIG. 6, the functional principle of this embodiment being described in more detail here. The pipe segments 10 can be seen, which are to be switched on or off individually by rotating the diaphragm 15. The constantly opened central segment 42 is located in the middle. A hub 48 of the diaphragm is held on the axis of rotation by ribs 49.
Die Permanentmagnete 43 sind in der Nähe des Außenumfanges der Blende 15 angebracht. Dabei weisen die Nordpole N und die Südpole S jeweils benachbarter Permanentmagneten abwechselnd nach außen und innen. Der Abstand zwischen je zwei benachbarten Permanentmagneten wird so groß gewählt, daß von den zwei benachbart angeordneten und an dem nicht dargestellten Lagerdeckel 13 befestigten Spulenkörpern A, B jeweils eine einem der Permanentmagneten und die andere einem Zwischenraum zwischen den Permanentmagneten zugeordnet ist.The permanent magnets 43 are attached in the vicinity of the outer circumference of the diaphragm 15. The north poles N and the south poles S of adjacent permanent magnets alternately point outwards and inwards. The distance between two adjacent permanent magnets is chosen so large that one of the permanent magnets and the other one is assigned to one of the permanent magnets and the other to an intermediate space between the two coil bobbins A, B, which are arranged adjacent to and are not attached to the bearing cover 13.
Im folgenden wird der erste Permanentmagnet betrachtet, der gemäß Figur 8 dem Spulenkörper A zugeordnet ist. Dieser befindet sich in der dargestellten Lage in der Position P1 . Die Wirkungsweise der Spulen zur Bewegung der Blende 15 wird aus der Tabelle gemäß Figur 9 deutlich. P1 ist in der ersten Zeile dargestellt. Um die Blende in die Zwischenstellung Z zu bewegen, sind zwei Schaltimpulse für die Spulenkörper erforderlich, wie in der zweiten Zeile der Tabelle dargestellt. Im ersten Schaltimpuls (s. Spalte I in der Tabelle) werden beide Spulenkörper derart durchflössen, daß deren Südpol dem Permanentmagneten zugewandt ist. Dadurch wird der Permanentmagnet gegenüber dem Spulenkörper A abgestoßen und gleichzeitig der benachbarte Permanentmagnet zum Spulenkörper B hingezogen, wodurch die Blende sich im Uhrzeigersinn in die Zwischenposition Z bewegt. Ein zweiter Impuls des Spulenkörpers B führt zum Verharren des zweiten Permanentmagneten vor diesem Spulenkörper, wodurch die Blende in dieser Position fixiert wird. Wird der Strom in der Zwischenposition Z abgeschaltet, so bleibt der Eisenkern des Spulenkörpers magnetisiert. Diese Magnetisierung wird zusätzlich durch das Magnetfeld des Permanentmagneten unterstützt. Dieses Prinzip wirkt in allen Positionen P und allen Zwischenpositionen Z, da immer einer der Permanentmagneten 43 mit einem der Spulenkörper A, B zusammenwirkt.The first permanent magnet, which is assigned to the coil former A in accordance with FIG. 8, is considered below. This is in position P1 in the position shown. The mode of operation of the coils for moving the diaphragm 15 is clear from the table in FIG. 9. P1 is shown on the first line. In order to move the diaphragm into the intermediate position Z, two switching pulses are required for the coil formers, as shown in the second line of the table. In the first Switching impulse (see column I in the table) flows through both bobbins in such a way that their south pole faces the permanent magnet. As a result, the permanent magnet is repelled relative to the coil former A and at the same time the adjacent permanent magnet is drawn towards the coil former B, as a result of which the diaphragm moves clockwise into the intermediate position Z. A second pulse from the coil body B leads to the second permanent magnet remaining in front of this coil body, as a result of which the diaphragm is fixed in this position. If the current is switched off in the intermediate position Z, the iron core of the coil body remains magnetized. This magnetization is additionally supported by the magnetic field of the permanent magnet. This principle works in all positions P and all intermediate positions Z, since one of the permanent magnets 43 always interacts with one of the coil formers A, B.
Im nächsten Schritt wird durch die Impulse 3, 4 (vergl. Figur 9) die Blende in die Position P2 gebracht, wodurch das erste Rohrsegment 10 vollständig verschlossen wird. Der Ablauf der Impulse läßt sich der Figur 9 entnehmen. Für eine Umkehr der Bewegungsrichtung wird dasselbe Impulsmuster für die beiden Spulenkörper A, B verwendet, mit dem einzigen Unterschied, daß die Spulenkörper A, B umgepolt werden. Auf diese Weise läßt sich die Blende unter Verwendung von zwei Spulenkörpern in beide Richtungen bewegen. Die Funktion ist mit der eines Schrittmotors vergleichbar. In the next step the impulses 3, 4 (cf. FIG. 9) bring the diaphragm into position P2, as a result of which the first tube segment 10 is completely closed. The course of the pulses can be seen in FIG. 9. To reverse the direction of movement, the same pulse pattern is used for the two bobbins A, B, with the only difference that the bobbins A, B are reversed. In this way, the diaphragm can be moved in both directions using two bobbins. The function is comparable to that of a stepper motor.

Claims

Patentansprüche claims
1. Ansaugrohr, insbesondere als Luftansaugstutzen im Ansaugtrakt einer Brennkraftmaschine, welches ein durch ein Stellorgan (23, 23a) angetriebenes Stellelement (14) zur Veränderung eines Strömungsquerschnittes für das angesaugte Medium aufweist, dadurch gekennzeichnet, daß das Stellelement aus einer Blende (15) besteht, die einzelne, den Gesamtquerschnitt des Ansaugrohres bildende Rohrsegmente (10, 42) abdeckt, wobei die Anzahl der abgedeckten Rohrsegmente wählbar ist.1. Intake pipe, in particular as an air intake in the intake tract of an internal combustion engine, which has an actuating element (14) driven by an actuating element (23, 23a) for changing a flow cross section for the aspirated medium, characterized in that the actuating element consists of an orifice (15) , which covers individual pipe segments (10, 42) forming the total cross section of the intake pipe, the number of covered pipe segments being selectable.
2. Ansaugrohr nach Anspruch 1 , dadurch gekennzeichnet, daß die Rohrsegmente als Kreis- oder Kreisringsegmente ausgebildet sind, die auf einer gemeinsamen Kreisfläche (25) liegen, wobei die Blende (15) drehbar gelagert ist und deren Drehachse durch den Mittelpunkt (M) dieser Kreisfläche verläuft.2. Intake pipe according to claim 1, characterized in that the pipe segments are designed as circular or circular ring segments which lie on a common circular surface (25), the diaphragm (15) being rotatably mounted and the axis of rotation through the center point (M) thereof Circular area runs.
3. Ansaugrohr nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Blende (15) die Form eines Kreissegmentes besitzt, welches im Mittelpunkt (M) des zugehörigen Kreises drehbar gelagert ist.3. Intake pipe according to one of the preceding claims, characterized in that the diaphragm (15) has the shape of a circular segment which is rotatably mounted in the center (M) of the associated circle.
4. Ansaugrohr nach Anspruch 3, dadurch gekennzeichnet, daß die Blende (15) aus mehreren Segmentstücken (23) besteht, die durch Drehung um den Mittelpunkt (M) lamellenartig übereinanderschiebbar sind.4. Intake pipe according to claim 3, characterized in that the diaphragm (15) consists of several segment pieces (23) which can be slid together like a slat by rotation about the center point (M).
5. Ansaugrohr nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß ein Rohrsegment als Zentralsegment (42) ausgebildet ist, welches sich im Zentrum der Blende (15) befindet und unabhängig von der Stellung der Blende teilweise oder vollständig geöffnet bleibt.5. Intake pipe according to one of claims 2 to 4, characterized in that a tube segment is formed as a central segment (42) which is located in the center of the diaphragm (15) and remains partially or completely open regardless of the position of the diaphragm.
6. Ansaugrohr nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß das Stellorgan in einem abgeteilten Volumen (20) angeordnet ist, welches den Rohrsegmenten (10) benachbart angeordnet ist. 6. Intake pipe according to one of the preceding claims, characterized in that the actuator is arranged in a divided volume (20) which is arranged adjacent to the pipe segments (10).
7. Ansaugrohr nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Blende (15) Teil eines integralen Stellorgans (23a) ist.7. Intake pipe according to one of claims 1 to 5, characterized in that the diaphragm (15) is part of an integral actuator (23a).
8. Ansaugrohr nach Anspruch 7, dadurch gekennzeichnet, daß das integrale Stellorgan (23a) mindestens zwei Permanentmagnete (43) und mindestens zwei Spulenkörper (A, B) aufweist, wobei8. Intake pipe according to claim 7, characterized in that the integral actuator (23a) has at least two permanent magnets (43) and at least two coil formers (A, B), wherein
- die Spulenkörper durch elektrischen Strom in beiden Richtungen durchströmbar sind,electrical current can flow through the coil former in both directions,
- das magnetische Feld der Spulenkörper sich mit dem magnetischen Feld der Permanentmagnete überschneidet, so daß Spulenkörper und Permanentmagnete jeweils Betätigungspaare für die Blende (15) bilden,- The magnetic field of the coil former overlaps with the magnetic field of the permanent magnets, so that the coil former and permanent magnets each form actuating pairs for the diaphragm (15),
- jeweils ein Partner des Betätigungspaares gehäusefest angebracht ist und jeweils der andere Partner des Betätigungspaares an der Blende angebracht ist.- One partner of the actuating pair is attached to the housing and the other partner of the actuating pair is attached to the panel.
9. Ansaugrohr nach Anspruch 8, dadurch gekennzeichnet, daß die zwei Spulenkörper (A, B) gehäusefest und nebeneinander bezogen auf die Bewegungsrichtung der Blende angeordnet sind und daß die Permanentmagnete in der Blende derart angeordnet sind, daß diese in Bewegungsrichtung an den Spulenkörpern vorbeiwandern, wobei der Abstand so gewählt ist, daß in bestimmten Positionen (P1 , P2, Z) das Magnetfeld des einen Spulenkörpers sich mit dem Magnetfeld eines Permanentmagneten überschneidet, während das Magnetfeld des anderen Spulenkörpers im wesentlichen in den Zwischenraum zwischen zwei Permanentmagneten hineinreicht.9. Intake pipe according to claim 8, characterized in that the two coil bobbins (A, B) are arranged fixed to the housing and side by side with respect to the direction of movement of the diaphragm and that the permanent magnets are arranged in the diaphragm in such a way that they move past the coil bobbins in the direction of movement, the distance being chosen so that in certain positions (P1, P2, Z) the magnetic field of one coil body overlaps with the magnetic field of a permanent magnet, while the magnetic field of the other coil body extends essentially into the space between two permanent magnets.
10.Ansaugrohr nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Rohrsegmente (10) einen sich zu einem Ansaugstutzen (11 ) hin verjüngenden Querschnittsverlauf aufweisen.10.suction pipe according to one of the preceding claims, characterized in that the pipe segments (10) have a cross-sectional profile tapering towards an intake pipe (11).
1 1.Ansaugrohr nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Blende (15) auf einem Lagerdeckel (13) montiert ist, der sich in der Ansaugrohrwandung abstützt. 1 1.Absaugrohr according to any one of the preceding claims, characterized in that the diaphragm (15) is mounted on a bearing cover (13) which is supported in the Ansaugrohrwandung.
. Ansaugrohr nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Rohrsegmente (10) in Schlauchstutzen (40) für Einlaßschläuche (41 ) münden. , Intake pipe according to one of the preceding claims, characterized in that the pipe segments (10) open into hose sockets (40) for inlet hoses (41).
PCT/EP2000/005444 1999-07-14 2000-06-14 Tube having a variable intake cross-section WO2001006103A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2001511296A JP2003505637A (en) 1999-07-14 2000-06-14 Suction tube with variable suction cross section
EP00943801A EP1114243A1 (en) 1999-07-14 2000-06-14 Tube having a variable intake cross-section

Applications Claiming Priority (2)

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DE19932826.9 1999-07-14
DE1999132826 DE19932826A1 (en) 1999-07-14 1999-07-14 Pipe with variable intake cross-section

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JP (1) JP2003505637A (en)
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