EP1090224A1 - Tubulure a section variable - Google Patents

Tubulure a section variable

Info

Publication number
EP1090224A1
EP1090224A1 EP98908059A EP98908059A EP1090224A1 EP 1090224 A1 EP1090224 A1 EP 1090224A1 EP 98908059 A EP98908059 A EP 98908059A EP 98908059 A EP98908059 A EP 98908059A EP 1090224 A1 EP1090224 A1 EP 1090224A1
Authority
EP
European Patent Office
Prior art keywords
section
vario
pipe
cross
tube
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.)
Withdrawn
Application number
EP98908059A
Other languages
German (de)
English (en)
Inventor
Rolf Füsser
Rudolf Leipelt
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.)
Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and 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 and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Publication of EP1090224A1 publication Critical patent/EP1090224A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • F02B27/0205—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means characterised by the charging effect
    • F02B27/021—Resonance 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
    • F02B27/0294—Actuators or controllers therefor; Diagnosis; Calibration
    • 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

Definitions

  • the invention relates to a tube with a variable cross section according to the preamble of independent claim 1.
  • Such a tube is known from US 4928638.
  • 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 reducing the low-frequency components in the intake noise in such a way that the unpleasant cavity resonances in the passenger compartment do not occur.
  • 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. In the full-load range, the air supply to the engine is guaranteed by opening the pipe cross-section completely.
  • the narrowing of the tube cross-section is achieved by an elastic hollow body inserted into the tube, the volume of which depends on an external pressure.
  • the invention has for its object to provide a vario element for narrowing the tube cross section, which generates a reduction in the tube cross section by the desired amount when actuated.
  • the vario element according to the invention expands into the cross section of the tube depending on the operating state of the engine.
  • the change in the pipe cross-section is clearly defined over the entire length of the Vario element. This has the advantage that the design of the vario element and tube can be optimized according to acoustic criteria.
  • the bottom structure of the bellows is to be understood as a wall section which changes the cross section and which narrows the pipe cross section when the bellows is actuated.
  • the cross-section-changing wall section is connected to a rolling membrane, which ensures the mobility of the wall section.
  • a further embodiment of the invention provides a folding wall as a cross-section-changing wall section, which reduces the cross-section of the tube by actuating a pivoting mechanism.
  • the swivel mechanism is designed such that it forms a cavity with this when the folding wall is actuated. According to a further embodiment of the invention, this cavity can be sealed against the pipe wall.
  • the cavity formed by the vario element can be provided with a pressure connection.
  • the pressure connection can be connected to a pressure tapping point in the further course of the intake duct, the negative pressure prevailing there being used for self-control, or can be controlled externally.
  • An expedient embodiment of the invention provides for means to increase the stiffness of its flanks inside the vario element. These means are intended to prevent the flanks from falling in when the vario element is actuated by actuation by means of a vacuum. At the same time, these or other means can generate a force inside the vario element, which causes the vario element to expand into the tube cross section and thus counteracts the negative pressure as the actuating force.
  • Another embodiment of the invention provides for the actuation of the vario element an external control element, for example a vacuum box, an electr. Servomotor, a solenoid or the like in front. This can also be used to support the vacuum control already described.
  • an external control element for example a vacuum box, an electr. Servomotor, a solenoid or the like in front. This can also be used to support the vacuum control already described.
  • the folding wall and swivel mechanism can be provided with one or more through openings, or the gap created between the vario element and the tube wall can be used.
  • broadband attenuation or attenuation of special frequencies in the intake noise can be achieved.
  • the volume of the cavity changes favorably when the vario element is actuated in relation to the frequencies of the intake noise to be damped, depending on the load state of the engine.
  • FIG. 1 shows a longitudinal section through the intake pipe, which is provided with a rolling membrane vario element
  • FIG. 2 shows the section A-A from FIG. 1,
  • FIG. 3 shows a cross section through a tube with a bellows vario element
  • FIG. 4 shows a variant of the bellows vario element
  • FIG. 5 shows the Vario element being supported by an inserted floor pan
  • FIG. 6 the support of the vario element by an inserted foam body
  • FIG. 7 the support of the vario element by an integrated support cylinder
  • FIG. 8 shows a longitudinal section through the tube with a vario element in the form of a folding wall.
  • the tube 10 has an opening 17 on the suction side and on an engine side 14 there is the possibility of attachment to the intake duct of the engine, so that the air drawn in by the engine must pass through the tube.
  • the tube 10 has a substantially rectangular cross section, in the upper half of which a vario element 20 is arranged.
  • This design has the advantage that a cross-section-changing wall section 11 can be made substantially flat and, when the vario element 20 is actuated, the pipe cross-section is narrowed like a stamp. Other, coordinated geometries of the Vario element and pipe cross-section do not restrict the function of the pipe in any way.
  • the cross-section-changing wall section can be stiffened by a ribbing 42 of fields.
  • the cross-section-changing wall section 11 and a rolling membrane 22 are made in one piece and form a cavity 12 with a lid 18.
  • This cavity is in the lid with a Provided vacuum connection 13, which can be designed as a hose connector 44 with disassembly aid.
  • the cover 18 is inserted into a pipe shell 19 during assembly and is held by snap locks 45.
  • the upper edge of the rolling membrane 22 is clamped in and simultaneously acts as a seal.
  • the seal can also be designed as an O-ring.
  • springs 23 In the cavity 12 of the vario element there are springs 23, the spring force of which is directed towards an expansion of the vario element and thus counteracts the negative pressure applied as the actuating force.
  • the springs 23 are guided and accommodated in the ribbing 42 by recesses 47 and in the cover by spring pins 41.
  • the spring pins and longitudinal ribs 43 serve as an upper stop for the vario element.
  • the characteristic curves of the springs 23 used must be individually adapted to the desired actuating chin system of the vario element and to the pressure conditions prevailing in the tube.
  • the vacuum connection 13 creates the possibility of self-control of the vario element in that it is connected to a pressure withdrawal in the further course of the intake duct in front of the throttle valve.
  • FIG. 2 is the section A-A of Figure 1.
  • the substantially rectangular tube cross section of the tube 10 is clear.
  • the vario element 20 is shown in its two extreme positions. At the bottom of the tube 10 stop ribs 40 limit the movement of the vario element and thus prevent the suction channel from being completely closed.
  • FIG. 3 shows a cross section of the tube 10, the vario element 20 in this variant consisting of a bellows 21. Like the rolling membrane 22, this is clamped between the tubular shell 19 and the cover 18 provided with snap closures 45.
  • the lower stop is formed by a longitudinal ribbing 48 attached to the bellows, which at the same time stiffens the cross-section-changing wall section 11.
  • the upper stop is formed by transverse ribs 28, which at the same time cause the bellows to be guided sideways.
  • wire brackets 26 can be inserted into the bellows folds.
  • a similar effect can be also achieved by the bellows in two-component plastic injection molding 'is manufactured.
  • FIG. 4 is a cross-sectional view of the vario element produced as a blow part 25.
  • the vacuum connection is designed in this design as a snap connector 46, which is firmly connected to the bellows 25 and snaps into a through opening 49 in the tube 10 during assembly.
  • the tube is divided into two half-shells 50, 51, which, compared to the variant with tube shell 19 and cover 18, enables simplified production.
  • FIG. 5 shows the design of the Vario element 20 with a floor pan 29 inserted for reinforcement. This design is particularly suitable in combination with the rolling membrane 22. The top edge of the floor pan can also be used as an upper stop. The movement of the vario element of this design can be supported by springs 23.
  • FIG. 6 shows a variant of the vario element 20 with a foam body 24 inserted into the cavity 12.
  • This foam body simultaneously assumes the functions of serving as a support body and as a return spring.
  • the foam body can be designed as an easily produced stamped part made of plate material.
  • FIG. 7 shows the use of a support body 27 inserted into the cavity 12 of the vario element 20.
  • FIG. 3 A variant of the vario element as a folding wall 30 is shown in FIG.
  • the folding wall 30 is to be understood as a cross-section-changing wall section of the vario element.
  • the folding wall is actuated by a swivel mechanism 31, which essentially consists of a suction-side wall section 36, a motor-side wall section 33 and a control rod 37.
  • the control rod can be driven in particular by a membrane box 15.
  • the wall sections 33 and 36 are connected to the folding wall 30 by film hinges 38.
  • This assembly is provided with further film hinges 39 and inserted in snap closures 52 in the upper tube wall. Instead of these snap closures, axle bearings (not shown) can also be provided, which interact with pins molded onto the wall sections 33 and 36.
  • the folding wall 30 and the wall sections 33, 36 together with the tube wall form the cavity 12.
  • the boundary line between the vibrating parts and the tube wall can optionally be designed as a gap or as a seal.
  • the motor-side wall section
  • a single opening can be provided.
  • the folding wall 30 can be broken through a plurality of bores 53. Passages 53 and

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Exhaust Silencers (AREA)
  • Reciprocating Pumps (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

L'invention concerne une tubulure d'admission (10) à section variable, destinée notamment à être montée dans un secteur d'aspiration d'un moteur à combustion interne. A cet effet, il est prévu un vario-élément (20) réduisant la section de la tubulure, sur un long parcours, lors du fonctionnement. L'invention vise à maintenir le canal d'écoulement aussi étroit que possible, en conformité avec le régime de fonctionnement du moteur et de réduire ainsi les proportions des graves dans le bruit d'aspiration. Le vario-élément est de préférence activé par une dépression qui est obtenue dans le cours ultérieur du canal d'aspiration.
EP98908059A 1997-02-05 1998-02-05 Tubulure a section variable Withdrawn EP1090224A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19704230 1997-02-05
DE19704230 1997-02-05
PCT/EP1998/000616 WO1998035156A1 (fr) 1997-02-05 1998-02-05 Tubulure a section variable

Publications (1)

Publication Number Publication Date
EP1090224A1 true EP1090224A1 (fr) 2001-04-11

Family

ID=7819315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98908059A Withdrawn EP1090224A1 (fr) 1997-02-05 1998-02-05 Tubulure a section variable

Country Status (3)

Country Link
EP (1) EP1090224A1 (fr)
CA (1) CA2280917A1 (fr)
WO (1) WO1998035156A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102562176B1 (ko) * 2015-05-29 2023-08-01 헨 게엠베하 운트 콤파니 카게. 차량용 소음기

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518684A1 (de) * 1985-05-24 1986-11-27 Audi AG, 8070 Ingolstadt Saugrohr fuer eine mehrzylindrige brennkraftmaschine
DE3801153A1 (de) * 1987-01-24 1988-08-04 Mann & Hummel Filter Vorrichtung zur daempfung der ansauggeraeusche von brennkraftmaschinen
DE3807159A1 (de) * 1988-03-04 1989-09-14 Bayerische Motoren Werke Ag Saugrohr einer brennkraftmaschine
DE4013848A1 (de) * 1990-04-30 1991-10-31 Vdo Schindling Einrichtung zur daempfung des ansauggeraeusches bei dieselmotoren
IT1276257B1 (it) * 1994-10-25 1997-10-28 Giuseppe Raoul Piccinini Carburatore miscelatore con condotto principale o diffusore venturi intercambiabile con sezione variabile per la strozzatura parziale o

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9835156A1 *

Also Published As

Publication number Publication date
WO1998035156A1 (fr) 1998-08-13
CA2280917A1 (fr) 1998-08-13

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