EP0509782A1 - Silencieux d'aspiration - Google Patents

Silencieux d'aspiration Download PDF

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Publication number
EP0509782A1
EP0509782A1 EP92303379A EP92303379A EP0509782A1 EP 0509782 A1 EP0509782 A1 EP 0509782A1 EP 92303379 A EP92303379 A EP 92303379A EP 92303379 A EP92303379 A EP 92303379A EP 0509782 A1 EP0509782 A1 EP 0509782A1
Authority
EP
European Patent Office
Prior art keywords
air duct
intake
intake air
damping device
duct member
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.)
Granted
Application number
EP92303379A
Other languages
German (de)
English (en)
Other versions
EP0509782B1 (fr
Inventor
Yasuo Matsumura
Atsushi Niimi
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Publication of EP0509782A1 publication Critical patent/EP0509782A1/fr
Application granted granted Critical
Publication of EP0509782B1 publication Critical patent/EP0509782B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
    • 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
    • F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or 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
    • F02M35/1277—Reinforcement of walls, e.g. with ribs or laminates; Walls having air gaps or additional sound damping layers

Definitions

  • the present invention relates to an intake noise damping device to be mounted in an intake system of an engine of a motor vehicle.
  • an air cleaner In an engine of a motor vehicle such as an automobile, a motorcycle, etc., an air cleaner is used for filtering the air which enters the engine, the air thus filtered being drawn into a combustion chamber of the engine after it is mixed with fuel in a carburettor.
  • this air cleaner noise is generated by the flow of intake air. This noise can sometimes increase to a significant level.
  • an air duct At the air inlet of the air cleaner, therefore, is mounted an air duct, in which sound absorbing means may be provided for the purpose of noise reduction.
  • the sound absorbing means described above can comprise an intake noise damping device as disclosed in Japanese Laid-Open Utility Model Publication No. 62-101018 (1987), in which a perforated section having a multitude of holes passing through a duct wall is formed in a part of an intake duct, and the outside wall of this perforated section is covered with a filter material, a sound absorbing material, and a hermetically sealing cover respectively.
  • Japanese Patent Publication No. 1-27253 (1989) discloses an intake noise damping device in which the inside wall of a square section intake air duct is lined with a layer of urethane sound absorbing material and the inside surface of this layer of sound absorbing material is supported by a frame formed of perforated plate or mesh.
  • an intake noise damping device mounted in an intake air duct formed by connecting first and second intake duct members.
  • a bulged section is formed in the first intake air duct member in the vicinity of a connection between the first intake air duct member and the second intake air duct member, and in this bulged section is installed a sound absorbing member.
  • a perforated plate Along the inside surface of the sound absorbing material is installed a perforated plate.
  • the second intake air duct member is inserted in the first intake air duct member with the end face thereof in contact with an opposite end face of the perforated plate.
  • the perforated plate is engaged with the first intake air duct through an engaging section formed on this plate.
  • the perforated plate can be supported securely in a specific position by contacting the end face of the second intake air duct member with the adjacent end face of the perforated plate. Furthermore, by properly engaging the perforated plate with the first intake air duct member, the assembly of the intake noise damping device is facilitated.
  • the intake air duct members and the perforated plate are cylindrical having an elliptical cross-section, and the perforated plate is provided with an engaging projection which is engaged in an engaging hole formed in the first intake air duct member.
  • the perforated plate may be provided with a hole or recess and the first intake air duct may be provided with a corresponding projection.
  • the engaging projection and hole may preferably be located on an end of the minor axis of the elliptical cross-section of the intake air duct members.
  • the intake noise damping device of the present invention having an intake air passage of elliptical cross-section, has little intake resistance, compared with one of polygonal cross-section.
  • the engagement between the perforated plate and the first intake air duct member is effected by fitting the engaging projection of the perforated plate in the engaging hole in the intake air duct member, thereby facilitating confirming the state of engagement.
  • the perforated plate can easily be installed in, and removed from, the intake air duct member.
  • the engaging hole and the engaging projection are located in the position corresponding to an end of the minor axis of the elliptical crosssection that is, in a surface section having a large radius of curvature which approximates to a flat surface, it is possible to easily form the engaging hole in the first intake air duct member with a high degree of accuracy.
  • a number of holes of the perforated plate are made in a direction of a minor axis of the elliptical crosssection in surface sections of large radius of curvature extending on both sides in a direction of a major axis of the ellipse from positions corresponding to both ends of the minor axis.
  • Fig. 1 is a perspective view showing a part of the interior of an engine compartment of an automobile equipped with an intake noise damping device according to the present invention.
  • Fig. 2 is a front view thereof.
  • reference numeral 1 refers to a wheel housing formed in the side of an engine compartment of a vehicle body; and numeral 2 is a fender or wing panel provided on the outside of the wheel housing 1.
  • wheel housing 1 In the wheel housing 1 is formed a wheel apron 1a bent inward.
  • a side frame 3 Along the inner edge thereof is installed a side frame 3.
  • An air cleaner 4 is mounted astride the wheel apron 1a and the side frame 3 at the front of a damper housing 1b formed in the wheel housing.
  • This air cleaner 4 is composed of a lower case 5 and an upper case 6 removably attached thereto, and a cleaner element not illustrated is mounted inside.
  • This intake air duct 7 consists of a first intake air duct member 8 which opens sidewards, extends across the front of the air cleaner 4, and is bent downwards at the other end, and a second intake air duct member 9 which is connected to the bent lower end of the first intake air duct member 8, passes through the wheel apron 1a upward after going around the lower part of the side frame 3, and is connected to an inlet port 5a formed in the front part of the lower case 5 and opening downward.
  • the intake noise damping device 12 of the present invention is mounted to the first intake air duct member 8. This intake noise damping device 12 is located on the first intake air duct member 8 side at the connection between the first intake air member 8 and the second intake air duct member 9 as illustrated.
  • the intake noise damping device 10 will be explained by referring to Figs. 3 to 9.
  • Fig. 3 is a rear view of the first intake air duct member 8 of Figs. 1 and 2, partly sectioned in the vicinity of the intake noise damping device 12.
  • a numeral 13 denotes a mounting section provided on the back of the first intake air duct member 8.
  • the first intake air duct member 8 is secured on the front surface of the lower case 5 by this mounting section 13.
  • the first intake air duct member 8 is expanded in diameter to form a bulged section 14.
  • the first intake air duct member 8 section of the upstream and downstream sides including this bulged section 14 has an elliptic cross sectional form as shown in Figs. 4 and 5, and is reinforced with ribs 15 projectingly extending lengthwise on both ends of the major axis b .
  • the rib 15 on one side serves also as a stay member for supporting the resonance chamber 11a.
  • a numeral 16 refers to a water drain hole provided in the bottom of the resonance chamber 11a.
  • the bulged section 14 is filled with a sound absorbing urethane material, fiber material, etc., and along the inner peripheral surface of this sound absorbing material 17 is installed a cylindrical perforated plate 18.
  • This perforated plate 18 also has an elliptic cross sectional form (Figs. 5 and 7), and is provided with a multitude of holes 19. These holes 19, as shown in Fig. 5, are cut in the direction of minor axis a , in surface sections 20 of a large radius of curvature extending to both sides in the direction of a major axis b from both ends a1, a1 of the minor axis a .
  • lugs 21 projecting to the upstream side from the center positions of the aforementioned upper and lower surface sections 20, that is, the positions at both minor axis ends a 1 , a 1 .
  • This lug 21 has a round engaging projection 22 protruding radially outward; on this projection 22 is formed a slant face 23 facing the upstream side.
  • an engaging hole 24 is provided in a position corresponding to the engaging projection 22 on the inner peripheral surface of the first intake air duct.
  • the perforated plate 18 and the first intake air duct member 8 can be engaged by fitting the engaging projection 22 in the engaging hole 24, the perforated plate 18 being supported in proper position by the first intake air duct member 8.
  • the slant face 23 serves as a guide face when the engaging projection 22 is fitted in the engaging hole 24, thereby facilitating the engagement of these parts.
  • the engaging hole 24 may be a hole passing through the pipe wall of the duct member 8 as shown in Fig. 8, or may be groove formed in the inner wall of the pipe as shown in Fig. 9.
  • the first intake air duct member 8 and the second intake air duct member 9 are connected by inserting the latter into the former from the downstream side of the intake noise damping device 12 thus formed.
  • a recess 25 is formed in the inside surface of the first intake air duct member 8 and a projection 26 in the outside surface of the second intake air duct member 9 (See Fig. 4). These duct members 8 and 9 are then properly positioned by fitting the projection 26 in the recess 25. At this time the end face 9a of the second intake air duct member 9 contacts the opposite end face 18b of the perforated plate 18, supporting the perforated plate 18 from the downstream side (Fig.3).
  • the intake noise damping device 12 constituted as described above, the number of component parts can be reduced, no water will enter the sound absorbing material 17, and the sectional area of the intake passage will not become smaller to thereby result in a lowered engine power output. Accordingly it is possible to obviate drawbacks inherent to the prior-art intake noise damping device.
  • the intake noise damping device of the present invention further has many advantages.
  • the engagement of the perforated plate 18 with the first intake air duct member 8 is effected by fitting the engaging projection 22 of the perforated plate 18 in the engaging hole 24 of the first intake air duct member 8; therefore the state of engagement of the perforated plate 18 with the first intake air duct member 8 can easily be confirmed by hand feel and also the perforated plate 18 can easily be installed to, and removed from the first intake air duct member 8.
  • the engaging hole 24 is a through hole as shown in Fig. 8
  • the engaging projection 22 thus engaged in the engaging hole 24 is visible from outside; and also the perforated plate 18 can be removed simply by pushing the engaging projection 22 from outside. That is, the confirmation of engagement between the engaging projection and the engaging hole and the removing operation can be carried out easily.
  • the engaging projection 22 and the engaging hole 24 are provided in the position corresponding to the end of the minor axis a , that is, in a surface section approximate to a flat surface of large radius of curvature , and accordingly the machining of these parts, particularly the forming of the engaging hole 24 in the first intake air duct member 8 can be effected with ease and with higher precision.
  • the intake air passage having an elliptic cross section, has less intake resistance as compared with an intake passage of polygonal cross section.
  • a numeral 27 is a die having the same elliptic sectional form as the perforated plate 18. All that is required to make the holes 19 is to insert a material plate 18′ to be punched over the die 27, and then to press a set of upper and lower dies 28 against the material plate 18′ from above and below in the direction of the minor axis.
  • the die 28 has many punches 29 projecting in parallel and corresponding to the holes 19 to be cut. All of the holes 19 are punched simultaneously with these punches 29.
  • the part where the holes 19 are cut that is, the surface section 20, extends in the direction of major axis with a large radius of curvature, at an angle close to a right angle with the direction of minor axis over the whole surface.
  • Each of the punches 29 cuts a hole 19 with a high accuracy in the material plate 18′ nearly at a right angle with the surface. According to the present invention, the holes 19 thus produced are short, which dose not require long projection of these punches 29. The punches 29, therefore, are hardly subject to damage and deformation.
  • the intake sound damping device requires a small number of component parts, no water will enter the sound absorbing material, and moreover, the sectional area of the intake passage will not become so small as to lower engine power output.
  • the perforated plate can be installed easily in and removed from, the intake air duct. Further it is possible to easily confirm the state of engagement of the perforated plate and the intake air duct member and also to easily process the engaging hole and the engaging projection with a higher accuracy. In addition the intake air passage has little intake resistance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust Silencers (AREA)
EP19920303379 1991-04-17 1992-04-15 Silencieux d'aspiration Expired - Lifetime EP0509782B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP110707/91 1991-04-17
JP11070791A JP2877982B2 (ja) 1991-04-17 1991-04-17 吸気消音装置

Publications (2)

Publication Number Publication Date
EP0509782A1 true EP0509782A1 (fr) 1992-10-21
EP0509782B1 EP0509782B1 (fr) 1994-06-15

Family

ID=14542424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920303379 Expired - Lifetime EP0509782B1 (fr) 1991-04-17 1992-04-15 Silencieux d'aspiration

Country Status (3)

Country Link
EP (1) EP0509782B1 (fr)
JP (1) JP2877982B2 (fr)
DE (1) DE69200194T2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001050000A1 (fr) * 2000-01-07 2001-07-12 Abb Turbo Systems Ag Silencieux pour le compresseur d'un turbocompresseur a gaz d'echappement
EP1146503A2 (fr) * 2000-04-14 2001-10-17 Siemens Canada Limited Entrefers optimisés pour l'élimination active des bruits
US8316987B2 (en) 2008-03-04 2012-11-27 Tokyo Roki Co., Ltd. Muffling structure of vent pipe and muffling structure of case
EP2388504B1 (fr) 2010-05-21 2018-07-11 OFFICINE METALLURGICHE G. CORNAGLIA S.p.A. Conduit atténuateur de bruit et sa méthode de fabrication
US10151274B2 (en) 2015-11-16 2018-12-11 Denso Corporation Abnormality detection device for internal combustion engine

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2895407B2 (ja) * 1994-12-01 1999-05-24 本田技研工業株式会社 吸気消音装置
JP3923198B2 (ja) 1998-10-14 2007-05-30 本田技研工業株式会社 自動車用吸気消音ダクト
JP4847749B2 (ja) * 2005-12-26 2011-12-28 株式会社マーレ フィルターシステムズ 空気導入ダクト
JP4727608B2 (ja) * 2007-03-16 2011-07-20 タイガースポリマー株式会社 吸気消音装置および消音方法
JP4996535B2 (ja) * 2008-05-08 2012-08-08 タイガースポリマー株式会社 吸音ダクト
JP5859371B2 (ja) * 2012-04-23 2016-02-10 タイガースポリマー株式会社 消音器付き吸気ダクト
KR102441400B1 (ko) 2017-11-17 2022-09-07 현대자동차주식회사 소음기 내부구조파이프에 설치되는 파이프고정용 클램프의 설치구조

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393163A1 (fr) * 1977-05-30 1978-12-29 Honda Motor Co Ltd Appareil servant a supprimer les bruits d'aspiration d'un moteur a combustion interne
DE3531353A1 (de) * 1985-09-03 1987-03-12 Audi Ag Ladeluftkuehler fuer aufgeladene brennkraftmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393163A1 (fr) * 1977-05-30 1978-12-29 Honda Motor Co Ltd Appareil servant a supprimer les bruits d'aspiration d'un moteur a combustion interne
DE3531353A1 (de) * 1985-09-03 1987-03-12 Audi Ag Ladeluftkuehler fuer aufgeladene brennkraftmaschine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001050000A1 (fr) * 2000-01-07 2001-07-12 Abb Turbo Systems Ag Silencieux pour le compresseur d'un turbocompresseur a gaz d'echappement
EP1146503A2 (fr) * 2000-04-14 2001-10-17 Siemens Canada Limited Entrefers optimisés pour l'élimination active des bruits
EP1146503A3 (fr) * 2000-04-14 2004-11-03 Siemens VDO Automotive Inc. Entrefers optimisés pour l'élimination active des bruits
US8316987B2 (en) 2008-03-04 2012-11-27 Tokyo Roki Co., Ltd. Muffling structure of vent pipe and muffling structure of case
EP2388504B1 (fr) 2010-05-21 2018-07-11 OFFICINE METALLURGICHE G. CORNAGLIA S.p.A. Conduit atténuateur de bruit et sa méthode de fabrication
EP2388504B2 (fr) † 2010-05-21 2023-01-18 OFFICINE METALLURGICHE G. CORNAGLIA S.p.A. Conduit atténuateur de bruit et sa méthode de fabrication
US10151274B2 (en) 2015-11-16 2018-12-11 Denso Corporation Abnormality detection device for internal combustion engine

Also Published As

Publication number Publication date
EP0509782B1 (fr) 1994-06-15
DE69200194T2 (de) 1994-09-29
JPH04318269A (ja) 1992-11-09
JP2877982B2 (ja) 1999-04-05
DE69200194D1 (de) 1994-07-21

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