EP2339162A2 - Assembly structure for synthetic-resin component - Google Patents

Assembly structure for synthetic-resin component Download PDF

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Publication number
EP2339162A2
EP2339162A2 EP20100192827 EP10192827A EP2339162A2 EP 2339162 A2 EP2339162 A2 EP 2339162A2 EP 20100192827 EP20100192827 EP 20100192827 EP 10192827 A EP10192827 A EP 10192827A EP 2339162 A2 EP2339162 A2 EP 2339162A2
Authority
EP
European Patent Office
Prior art keywords
duct
tubular fitting
fitting portion
component
tip
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Withdrawn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
EP20100192827
Other languages
German (de)
English (en)
French (fr)
Inventor
Akihito Toda
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.)
Mahle Filter Systems Japan Corp
Original Assignee
Mahle Filter Systems Japan Corp
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 Mahle Filter Systems Japan Corp filed Critical Mahle Filter Systems Japan Corp
Publication of EP2339162A2 publication Critical patent/EP2339162A2/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10354—Joining multiple sections together
    • 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
    • F02M35/02—Air cleaners
    • F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
    • F02M35/0202—Manufacturing or assembling; Materials for air cleaner housings
    • F02M35/0203—Manufacturing or assembling; Materials for air cleaner housings by using clamps, catches, locks or the like, e.g. for disposable plug-in filter cartridges
    • 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
    • F02M35/14—Combined air cleaners and silencers

Definitions

  • the present invention relates to a synthetic-resin component which is suitable for, e.g., a component for air-intake system such as a resonator and an air-intake duct in an internal combustion engine of vehicle, and more particularly, relates to the improvement of an assembly structure using elasticity of synthetic-resin material itself.
  • Japanese Patent Application Publication No. 2002-106437 discloses a previously proposed apparatus.
  • an air-intake system such as a resonator for reducing intake noise and an air-intake duct attached to the resonator in an internal combustion engine of vehicle is formed of synthetic-resin material having a proper flexibility by a blow molding or an injection molding.
  • These components are fitted and attached to each other under a sealed state by using an elasticity of components themselves.
  • FIGS. 6 and 7 are views showing one comparative example of components of an air-intake system.
  • a body 63 formed of synthetic resin is connected with a cover 64 formed of synthetic resin at opening edge portions of the body 63 and cover 64 so as to form a volume chamber 62 around an air-intake duct 61 formed of synthetic resin.
  • the volume chamber 62 functions as a resonance chamber of resonator.
  • the air-intake duct 61 is inserted into a tubular fitting portion 65 of the body 63, by press fitting.
  • a positioning protruding portion 66 provided in an outer circumference of the air-intake duct 61 is fitted to a concave portion 67 of the tubular fitting portion 65, so that the air-intake duct 61 is attached to the body 63 under the sealed state.
  • the opening edge portion of cover 64 is connected and fixed to a connecting portion 68 of the body 63 by means of vibration welding or the like.
  • the connecting portion 68 of body 63 to which the cover 64 is connected needs to be provided away from the tubular fitting portion 65 of body 63 to which the air-intake duct 61 is fitted.
  • an interval (distance) D1 between an inner space of the air-intake duct 61 and the volume chamber 62 provided around the air-intake duct 61 is large.
  • a dead space which is not available as the volume chamber becomes large to reduce a capacity (volume) of the volume chamber 62. If trying to secure a necessary capacity of the volume chamber 62, whole of the air-intake system grows in size.
  • an assembly structure comprising: a duct formed of synthetic resin, the duct including a protruding portion provided in an outer circumference of the duct; a first component formed of synthetic resin, the first component including a first tubular fitting portion configured to be fitted to a tip portion of the duct by an insertion of the duct; and a second component formed of synthetic resin and configured to be fitted to the first component to define a volume chamber around the duct, the second component including a second tubular fitting portion having a large diameter portion located at a tip side of the second tubular fitting portion relative to an insertion direction of the duct and configured to be fitted to an outer circumferential surface of the first tubular fitting portion, a small diameter portion located at a root side of the second tubular fitting portion relative to the insertion direction and configured to be fitted to the duct, and a step surface located between the large diameter portion and the small diameter portion, wherein the step surface faces a tip surface of the first tubular fitting portion to provide a concave
  • an assembly method for synthetic-resin components including a duct formed of synthetic resin, the duct including a protruding portion provided in an outer circumference of the duct; a first component formed of synthetic resin, the first component including a first tubular fitting portion; and a second component formed of synthetic resin, the second component including a second tubular fitting portion having a large diameter portion located at a tip side of the second tubular fitting portion, a small diameter portion located at a root side of the second tubular fitting portion, and a step surface located between the large diameter portion and the small diameter portion, the assembly method comprising: fitting the large diameter portion to an outer circumferential surface of the first tubular fitting portion to define a volume chamber; causing the step surface to face a tip surface of the first tubular fitting portion so as to provide a concave portion between the step surface and the tip surface; fitting a tip portion of the duct to the first tubular fitting portion by an insertion of the duct; fitting
  • FIG. 1 is a cross sectional view showing components of air-intake system under an assembled state, in an embodiment according to the present invention.
  • FIG. 2 is a cross sectional view showing the components of air-intake system under an exploded state, in the embodiment.
  • FIG. 3 is an exploded perspective view of the components of air-intake system.
  • FIG. 4 is a perspective view showing the components of air-intake system.
  • FIG. 5 is a cross sectional view showing the components of air-intake system.
  • FIG. 6 is a cross sectional view showing an assembled state of components of air-intake system, in a comparative example.
  • FIG. 7 is a cross sectional view showing an exploded state of the components of air-intake system, in the comparative example.
  • FIGS. 3 to 5 show components formed of synthetic-resin in the embodiment according to the present invention. These components function as components of air-intake system (induction system) for an internal combustion engine of vehicle.
  • a structure of air-intake system is given by connecting (assembling) a plurality of components with one another.
  • the plurality of components are formed by an injection molding of synthetic-resin material.
  • the components of intake-air system include an air intake duct 11, a body 13, a cover 14, and a housing 15.
  • the air intake duct 11 is formed in a cylindrically tubular shape.
  • the body 13 cooperates with the cover 14 to define a volume chamber 12, by causing one opening edge portion of the body 13 to be fitted to (engaged with) an opening edge portion of the cover 14.
  • the volume chamber 12 is formed by the body 13 and the cover 14 around the air intake duct 11, as a resonant chamber of resonator.
  • the housing 15 is engaged with (or fitted to) another opening edge portion of the body 13. Thereby, the housing 15 holds the body 13 and supports a filter element 16 by sandwiching the filter element 16 between the housing 15 and the body 13.
  • the body 13 corresponds to a first component according to the present invention
  • the cover 14 corresponds to a second component according to the present invention.
  • the air intake duct 11 includes a pair of duct division members 17 and 18 which are fitted to each other. That is, the air intake duct 11 can be divided in half, i.e., into the duct division members 17 and 18 along a passage-length direction of the air intake duct 11.
  • a plurality of locking nails (hooks) 19 are provided to an opening edge portion of one of the duct division members 17 and 18.
  • a plurality of locking grooves (engaging grooves) 20 are provided to an opening edge portion of another of the duct division members 17 and 18.
  • the both duct division members 17 and 18 are combined integrally with each other, by causing the plurality of locking nails 19 to be engaged with the plurality of locking grooves 20.
  • One end portion 21 of air intake duct 11 which is attached to the body 13 and the cover 14 is not dividable, i.e., is formed by one (18 in FIG. 3 ) of the duct division members 17 and 18 in a cylindrical tube shape. That is, the one end portion 21 is formed by one member in order to secure an assembling performance and its accuracy.
  • This one end portion 21 includes an after-mentioned protruding portion 31 and a duct-side diameter-enlarged portion 32.
  • a plurality of hooks 22 are provided to the opening edge portion of one (14 in FIG. 3 ) of the body 13 and cover 14.
  • a plurality of locking protrusions 23 are provided to the opening edge portion of another (13 in FIG. 3 ) of the body 13 and cover 14.
  • the plurality of hooks 22 are engaged (locked) with the plurality of locking protrusions 23 so that the cover 14 is attached integrally to the body 13.
  • a plurality of metal pieces 24 are provided to the opening edge portion of one (13 in FIG. 3 ) of the body 13 and the housing 15, and on the other hand, a plurality of locking portions 25 are provided to an opening edge portion of another (15 in FIG. 3 ) of the body 13 and the housing 15.
  • the plurality of metal pieces 24 are engaged with the plurality of locking portions 25, so that the body 13 is attached integrally to the housing 15 so as to sandwich the filter element 16 between the body 13 and the housing 15.
  • An intake air which has been introduced from the air intake duct 11 into the body 13 is partly supplied through a return pipe passage 26 to the volume chamber 12.
  • the return pipe passage 26 functions as a neck portion (throttle portion).
  • the intake air inside the body 13 is supplied through the filter element 16 to the side of a combustion chamber of the internal combustion engine.
  • An opening portion 27 is formed in an outer wall of the body 13 to pass through the outer wall, in order to prevent an undercut of the return pipe passage 26 at the time of injection molding of the body 13. This opening portion 27 is covered by a cover portion (lid) 28, afterwards.
  • FIGS. 1 and 2 are cross sectional views showing an assembly structure among the air intake duct 11, the body 13 and the cover 14, which constitutes a main part according to this embodiment.
  • FIGS. 1 and 2 are simplified views for clearly showing a part surrounded by an alternate long-and-short dash line ⁇ of FIG. 5 .
  • FIG. 1 shows an assembled state of the air intake duct 11, the body 13 and the cover 14.
  • FIG. 2 shows a not-yet-assembled state (pre-assembly state) of the air intake duct 11, the body 13 and the cover 14.
  • a duct outer circumferential surface 30 of the air intake duct 11 is formed in a cylindrical surface which is tapering gradually toward a tip side of air intake duct 11 (in a lower direction of FIGS. 1 and 2 ). That is, the duct outer circumferential surface 30 is a gentle tapered surface whose diameter becomes smaller as a location for measuring the diameter is more shifted in an insertion direction S1.
  • This duct outer circumferential surface 30 is formed with the protruding portion 31 which bulges outwardly in a radial direction of air intake duct 11. That is, the protruding portion 31 is formed to protrude in an expanded state from the duct outer circumferential surface 30.
  • this protruding portion 31 is provided to extend along an entire circumference of the duct outer circumferential surface 30, i.e., is formed over the entire circumferential range of the duct outer circumferential surface 30 in a strip shape (belt shape).
  • a plurality of protruding portions each of which is formed in an embossed shape may be provided on the duct outer circumferential surface 30 intermittently in a circumferential direction of air intake duct 11, instead of the strip-shaped protruding portion 31.
  • a duct-side diameter-enlarged portion 32 is provided in an outer circumference of the air intake duct 11, i.e., on the duct outer circumferential surface 30 of air intake duct 11.
  • This duct-side diameter-enlarged portion 32 is formed at a root side (counter-tip side of air intake duct 11) beyond the protruding portion 31 (at an upper location of FIGS. 1 and 2 beyond the protruding portion 31), and bulges outwardly in the radial direction so as to increase thickness and outer diameter of the air intake duct 11.
  • a duct-side tapered-surface portion 33 which has a relatively steeply-inclined surface is provided between an outer circumferential surface of the duct-side diameter-enlarged portion 32 and the duct outer circumferential surface 30.
  • the duct-side tapered-surface portion 33 reduces its outer diameter more as a location for measuring this outer diameter is more shifted in a tip direction (insertion direction S1) of air intake duct 11.
  • the duct-side tapered-surface portion 33 is continuous with the duct outer circumferential surface 30.
  • the body 13 includes a first tubular fitting portion (joint portion) 34 into which the tip of air intake duct 11 is fitted.
  • the cover 14 includes a second tubular fitting portion 35. (An inner circumference of)
  • This second tubular fitting portion 35 includes a large diameter portion 36 located at a tip side of second tubular fitting portion 35 in the insertion direction S1 and a small diameter portion 37 located at a root portion of the second tubular fitting portion 35, and thereby, is formed in a step shape. That is, at a boundary portion between the large diameter portion 36 and the small diameter portion 37, the inner circumference of second tubular fitting portion 35 includes a step surface 38 which is an annular flat surface perpendicular to the insertion direction S1.
  • the large diameter portion 36 is fitted over an outer circumferential surface of the first tubular fitting portion 34 by press fitting.
  • the air intake duct 11 is fitted into the small diameter portion 37 by press fitting.
  • the inner circumference of second tubular fitting portion 35 includes a cover-side diameter-enlarged portion 39 provided at a root side beyond the small diameter portion 37, and a cover-side tapered-surface portion 40 provided between the cover-side diameter-enlarged portion 39 and the small diameter portion 37.
  • the cover-side diameter-enlarged portion 39 has an inner diameter larger than that of the small diameter portion 37.
  • the cover-side tapered-surface portion 40 has a steeply tapered surface, i.e., reduces its inner diameter in the tip direction continuously from the cover-side diameter-enlarged portion 39 to the small diameter portion 37.
  • the duct-side diameter-enlarged portion 32 and duct-side tapered-surface portion 33 of the air intake duct 11 are respectively in contact with the cover-side diameter-enlarged portion 39 and the cover-side tapered-surface portion 40 by surface contact.
  • a sealing is attained between the duct-side diameter-enlarged portion 32 and the cover-side diameter-enlarged portion 39 and also between the duct-side tapered-surface portion 33 and the cover-side tapered-surface portion 40.
  • a tip portion of the second tubular fitting portion 35 is fitted on and fixed to the outer circumferential surface of first tubular fitting portion 34 under a surface contact by press fitting, as shown in FIG. 1 .
  • a concave portion 42 is secured between the step surface 38 of second tubular fitting portion 35 and a tip surface 41 of first tubular fitting portion 34 which faces the step surface 38.
  • This tip surface 41 is an annular flat surface perpendicular to an axial direction of the first tubular fitting portion 34 (insertion direction S1).
  • the concave portion 42 is a space which opens in a radially inner direction, and is formed in a channel shape, i.e., in an angular-U shape in cross section taken parallel to the insertion direction S1. That is, sizes of the first and second tubular fitting portions 34 and 35 and the like are determined and set so as to obtain the concave portion 42.
  • the protruding portion 31 formed in the outer circumference of air intake duct 11 can smoothly ride over (move through) the small diameter portion 37 by use of the cover-side tapered-surface portion 40 of second tubular fitting portion 35. Thereby, the protruding portion 31 moves into (i.e., is fitted into) the concave portion 42, so that a positioning of the air intake duct 11 relative to the first and second tubular fitting portions 34 and 35 is conducted in the insertion direction S1.
  • the air intake duct 11 and the first and second tubular fitting portions 34 and 35 are integrally assembled, i.e., are attached to one another.
  • the body 13, the cover 14 and the air intake duct 11 are attached to one another without a connecting process using vibration welding or the like.
  • the sealing among these three members is attained by means of elasticity of synthetic resin itself.
  • the body 13, the cover 14 and the air intake duct 11 can be assembled by only inserting the air intake duct 11 into the first and second tubular fitting portions 34 and 35, i.e., can be assembled by a so-called simple snap-fit fixing structure. Therefore, an assembly operation for these three members is very easy.
  • the air intake duct 11 is fitted integrally to the first and second tubular fitting portions 34 and 35 defining a part of an inner wall surface of the volume chamber 12.
  • an interval (or distance) D2 between an air-flow space of the air intake duct 11 and the volume chamber 12 arranged around the air intake duct 11 can be suppressed to the minimum.
  • this interval D2 corresponds to a width of the air intake duct 11 and the first and second tubular fitting portions 34 and 35 (sum of a duct thickness of air intake duct 11 and a tube thickness of first and second tubular fitting portions 34 and 35) under the assembled state.
  • a dead space which is not available as the volume chamber 12 is suppressed to the minimum, so that a space efficiency is improved. Therefore, a sufficient capacity (volume) of the volume chamber 12 can be secured while downsizing whole of the system including the volume chamber 12. In this embodiment, these two of the securement of sufficient capacity and the downsizing of system can be achieved at a high level.
  • a tip portion of the first tubular fitting portion 34 of body 13 is sandwiched between the air intake duct 11 and the tip portion of second tubular fitting portion 35 of cover 14.
  • a surface-contact portion between an inner circumferential surface of the first tubular fitting portion 34 and the outer circumferential surface 30 of air intake duct 11, and a surface-contact portion between the outer circumferential surface of the first tubular fitting portion 34 and an inner circumferential surface of second tubular fitting portion 35 Therefore, a double sealing is constructed so that a high sealing performance can be obtained.
  • the protruding portion 31 is fitted into the concave portion 42.
  • the duct-side diameter-enlarged portion 32 and the duct-side tapered-surface portion 33 of the air intake duct 11 are mutually in surface-contact with the cover-side diameter-enlarged portion 39 and the cover-side tapered-surface portion 40 of the second tubular fitting portion 35. Accordingly, the air intake duct 11 is held reliably and stably without fluctuating in the insertion direction S1. Therefore, a stable assembling performance can be attained.
  • the outer circumferential surface 30 of air intake duct 11 and the inner circumferential surface of first tubular fitting portion 34 which are in surface-contact with each other form complementary tapered-surfaces whose diameters become smaller as the points for measuring the diameters moves in the insertion direction S1.
  • an appropriate sealing surface-pressure is applied to the air intake duct 11 and the first tubular fitting portion 34, by the insertion of air intake duct 11.
  • the first tubular fitting portion 34 is bent (or deformed) in the radially outer direction (diameter-enlarging direction).
  • an appropriate sealing surface-pressure is applied also to the surface-contact portion between the first tubular fitting portion 34 and the second tubular fitting portion 35. Therefore, a sufficient sealing performance in the air intake duct 11 and also in the volume chamber 12 which causes an air pulsation can be ensured.
  • the air intake duct 11 is attached to an assembled member of the cover 14 and the body 13.
  • the structure according to the present invention is not limited to this.
  • the cover 14 may be attached to an assembled member of the air intake duct 11 and the body 13 after the air intake duct 11 was attached to the first tubular fitting portion 34 of body 13.
  • the duct-side diameter-enlarged portion 32 and the cover-side diameter-enlarged portion 39 are not provided in order for the cover 14 to be attached to the assembled member of air intake duct 11 and body 13.
  • the volume chamber 12 is provided over an entire circumference around the air intake duct 11 as shown in FIGS. 1 and 2 .
  • the structure according to the present invention is not limited to this.
  • the volume chamber 12 may be provided over a part of the entire circumference around the air intake duct 11.
  • the assembly structure according to the present invention is applied to the components for air-intake system of an internal combustion engine.
  • the structure according to the present invention is not limited to this.
  • the assembly structure according to the present invention is widely applicable to various synthetic-resin components such as a component having a duct shape and a component having a box shape.
  • the respective components are formed by the injection molding.
  • the assembly structure according to the present invention is applicable also to components formed by the other molding methods such as a blow molding.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
EP20100192827 2009-12-24 2010-11-29 Assembly structure for synthetic-resin component Withdrawn EP2339162A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009291633A JP5426358B2 (ja) 2009-12-24 2009-12-24 合成樹脂製部品の組付構造

Publications (1)

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EP2339162A2 true EP2339162A2 (en) 2011-06-29

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EP20100192827 Withdrawn EP2339162A2 (en) 2009-12-24 2010-11-29 Assembly structure for synthetic-resin component

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EP (1) EP2339162A2 (ja)
JP (1) JP5426358B2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113047989A (zh) * 2019-12-26 2021-06-29 曼·胡默尔有限公司 进气系统的连接结构和进气系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6206264B2 (ja) * 2014-03-13 2017-10-04 トヨタ紡織株式会社 エアクリーナ

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002106437A (ja) 2000-09-29 2002-04-10 Tennex Corp 吸気消音装置
JP2009291633A (ja) 2009-08-07 2009-12-17 Sankyo Co Ltd スロットマシン

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245478Y2 (ja) * 1974-08-23 1977-10-15
JPH0130610Y2 (ja) * 1986-02-24 1989-09-19
JP4270354B2 (ja) * 1999-06-10 2009-05-27 株式会社イノアックコーポレーション レゾネータ付きダクト
JP2002238669A (ja) * 2001-02-20 2002-08-27 Asuberu Kk パイプ棚
JP3668446B2 (ja) * 2001-09-03 2005-07-06 本田技研工業株式会社 多気筒内燃機関の吸気装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002106437A (ja) 2000-09-29 2002-04-10 Tennex Corp 吸気消音装置
JP2009291633A (ja) 2009-08-07 2009-12-17 Sankyo Co Ltd スロットマシン

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113047989A (zh) * 2019-12-26 2021-06-29 曼·胡默尔有限公司 进气系统的连接结构和进气系统

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JP5426358B2 (ja) 2014-02-26
JP2011132844A (ja) 2011-07-07

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