JP4799355B2 - Silencer - Google Patents

Silencer Download PDF

Info

Publication number
JP4799355B2
JP4799355B2 JP2006275545A JP2006275545A JP4799355B2 JP 4799355 B2 JP4799355 B2 JP 4799355B2 JP 2006275545 A JP2006275545 A JP 2006275545A JP 2006275545 A JP2006275545 A JP 2006275545A JP 4799355 B2 JP4799355 B2 JP 4799355B2
Authority
JP
Japan
Prior art keywords
wall
silencer
resonance chamber
intake duct
bottomed cylindrical
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.)
Active
Application number
JP2006275545A
Other languages
Japanese (ja)
Other versions
JP2008095555A (en
Inventor
明宏 大崎
裕明 小林
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.)
Kojima Industries Corp
Original Assignee
Kojima Industries 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 Kojima Industries Corp filed Critical Kojima Industries Corp
Priority to JP2006275545A priority Critical patent/JP4799355B2/en
Publication of JP2008095555A publication Critical patent/JP2008095555A/en
Application granted granted Critical
Publication of JP4799355B2 publication Critical patent/JP4799355B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

本発明は、車両の吸気ダクトに設けられる消音装置に関する。   The present invention relates to a silencer provided in an intake duct of a vehicle.

実開平6−53756号公報は、ヘルムホルツタイプ消音器の共鳴室内にサイドブランチタイプ消音器を突出させた消音装置を開示している。サイドブランチタイプ消音器を構成する有底筒状壁の底壁部は、ヘルムホルツタイプ消音器の共鳴室の大気との遮断壁に係合固定されている。   Japanese Utility Model Publication No. 6-53756 discloses a silencer in which a side branch type silencer is protruded into a resonance chamber of a Helmholtz type silencer. The bottom wall portion of the bottomed cylindrical wall constituting the side branch type silencer is engaged and fixed to a barrier wall between the resonance chamber of the Helmholtz type silencer and the atmosphere.

しかし、上記公報開示の消音装置には、つぎの問題点がある。
サイドブランチタイプ消音器を構成する有底筒状壁の底壁部が、ヘルムホルツタイプ消音器の共鳴室の大気との遮断壁に係合固定されているため、有底筒状壁が振動するとその振動が遮断壁に伝わり、そのまま遮断壁の外部に振動による放射音として出ていってしまうおそれがある。
また、図5に示すように、サイドブランチタイプ消音器3を構成する有底筒状壁3aの長さが短くヘルムホルツタイプ消音器2の遮断壁2aに達しない場合、有底筒状壁3aの底壁部3bと遮断壁2aとを係合固定するためには、遮断壁2aを凹まさなければならず、該凹ました部分をヘルムホルツタイプ消音器2の共鳴室2bとして有効活用できなくなる。
実開平6−53756号公報
However, the silencer disclosed in the above publication has the following problems.
Since the bottom wall part of the bottomed cylindrical wall constituting the side branch type silencer is engaged and fixed to the air barrier wall of the resonance chamber of the Helmholtz type silencer, when the bottomed cylindrical wall vibrates, The vibration is transmitted to the blocking wall and may be emitted as a radiated sound due to the vibration.
Further, as shown in FIG. 5, when the bottomed cylindrical wall 3a constituting the side branch type silencer 3 is short and does not reach the blocking wall 2a of the Helmholtz type silencer 2, the bottomed cylindrical wall 3a In order to engage and fix the bottom wall 3b and the blocking wall 2a, the blocking wall 2a must be recessed, and the recessed portion cannot be effectively used as the resonance chamber 2b of the Helmholtz type silencer 2.
Japanese Utility Model Publication No. 6-53756

本発明の第1の目的は、従来に比べて、サイドブランチタイプ消音器を構成する有底筒状壁の振動がヘルムホルツタイプ消音器の外部に放射音として出ていってしまうことを抑制できる消音装置を提供することにある。
本発明の第2の目的は、従来に比べてヘルムホルツタイプ消音器の共鳴室の容積を大にすることができる消音装置を提供することにある。
The first object of the present invention is to mute the vibration of the bottomed cylindrical wall constituting the side branch type silencer from being emitted as radiated sound to the outside of the Helmholtz type silencer as compared with the prior art. To provide an apparatus.
A second object of the present invention is to provide a silencer capable of increasing the volume of a resonance chamber of a Helmholtz type silencer as compared with the conventional one.

上記目的を達成する本発明はつぎの通りである。
(1) (a)吸気ダクトの一部を形成する吸気ダクト形成壁と大気と遮断する遮断壁とで囲まれる空間からなる共鳴室と、前記吸気ダクト内と前記共鳴室とを連通させる連通管を前記吸気ダクト形成壁から前記共鳴室内に延びて設けることで構成される連通部と、を備えるヘルムホルツタイプ消音器と、
(b)前記吸気ダクト形成壁から前記共鳴室内に突出する有底筒状壁にて構成されるサイドブランチタイプ消音器と、
を有し、
前記サイドブランチタイプ消音器を構成する有底筒状壁は、前記ヘルムホルツタイプ消音器の共鳴室の大気との遮断壁に非接触とされている消音装置であって、
前記消音装置は、別々に形成されて一体にされる第1、第2、第3のピースを備えており、
前記第1のピースに、前記吸気ダクト形成壁と前記遮断壁の一部と前記連通管と前記有底筒状壁の一部が形成されており、
前記第2のピースに、前記遮断壁の一部とは異なるさらなる一部と、前記有底筒状壁の残余の部分が形成されており、
前記第3のピースに、前記遮断壁の残余の部分が形成されている、消音装置。
The present invention for achieving the above object is as follows.
(1) (a) A resonance chamber composed of a space surrounded by an intake duct forming wall that forms a part of the intake duct and a blocking wall that blocks the atmosphere, and a communication pipe that connects the inside of the intake duct and the resonance chamber A Helmholtz type silencer comprising: a communication portion configured to extend from the intake duct forming wall into the resonance chamber; and
(B) a side branch type silencer configured by a bottomed cylindrical wall protruding from the intake duct forming wall into the resonance chamber;
Have
The bottomed cylindrical wall constituting the side branch type silencer is a silencer that is not in contact with the barrier wall with the atmosphere of the resonance chamber of the Helmholtz type silencer ,
The silencer includes first, second, and third pieces that are separately formed and integrated.
In the first piece, the intake duct forming wall, a part of the blocking wall, the communication pipe, and a part of the bottomed cylindrical wall are formed,
In the second piece, a further part different from the part of the blocking wall and a remaining part of the bottomed cylindrical wall are formed,
The silencer, wherein the remaining part of the blocking wall is formed on the third piece.

上記(1)の消音装置では、サイドブランチタイプ消音器を構成する有底通常壁がヘルムホルツタイプ消音器の共鳴室の大気との遮断壁に非接触とされているため、有底筒状壁が遮断壁に固定されている場合(接触している場合)に比べて、有底筒状壁の振動が遮断壁に伝わり難い。そのため、従来に比べて、サイドブランチタイプ消音器を構成する有底筒状壁の振動がヘルムホルツタイプ消音器の外部に放射音として出ていってしまうことを抑制できる。
また、サイドブランチタイプ消音器を構成する有底通常壁がヘルムホルツタイプ消音器の共鳴室の大気との遮断壁に非接触とされているため、有底筒状壁の長さが短く遮断壁に達しない場合であっても、遮断壁を凹ます必要はない。その結果、有底筒状壁の底壁部と遮断壁との間の空間をヘルムホルツタイプ消音器の共鳴室として活用でき、従来に比べて共鳴室の容積を大にすることができる。
In the silencer of the above (1 ), the bottomed normal wall constituting the side branch type silencer is not in contact with the shielding wall with the atmosphere of the resonance chamber of the Helmholtz type silencer. The vibration of the bottomed cylindrical wall is less likely to be transmitted to the blocking wall than when it is fixed to the blocking wall (when in contact). Therefore, compared with the past, it can suppress that the vibration of the bottomed cylindrical wall which comprises a side branch type silencer comes out as a radiated sound outside the Helmholtz type silencer.
In addition, since the bottomed normal wall that constitutes the side branch type silencer is not in contact with the shielding wall with the atmosphere of the resonance chamber of the Helmholtz type silencer, the length of the bottomed cylindrical wall is short and becomes the shielding wall. Even if it does not reach, it is not necessary to dent the barrier. As a result, the space between the bottom wall portion of the bottomed cylindrical wall and the blocking wall can be used as the resonance chamber of the Helmholtz type silencer, and the volume of the resonance chamber can be increased as compared with the conventional case.

図1〜図4は、本発明実施例の消音装置を示している。
本発明実施例の消音装置10は、図1に示すように、自動車用内燃機関への吸気ダクト40に設けられている。吸気ダクト40は、自動車用内燃機関の吸気流れ方向上流に配置されるダクト(ホース)である。吸気ダクト40は、図示略のエアクリーナの上流側のダクトであってもよく、図示略のエアクリーナの下流側のダクトであってもよい。
消音装置10は、ヘルムホルツタイプ消音器20と、サイドブランチタイプ消音器30と、を有する。
1 to 4 show a silencer of an embodiment of the present invention.
As shown in FIG. 1, the silencer 10 of the embodiment of the present invention is provided in an intake duct 40 for an automobile internal combustion engine. The intake duct 40 is a duct (hose) disposed upstream of the internal combustion engine for automobiles in the intake flow direction. The intake duct 40 may be a duct on the upstream side of an air cleaner (not shown) or a duct on the downstream side of an air cleaner (not shown).
The silencer 10 includes a Helmholtz type silencer 20 and a side branch type silencer 30.

ヘルムホルツタイプ消音器20は、共鳴室20aと、連通部20bと、を備える。
共鳴室20aは、図2に示すように、吸気ダクト40の一部を形成する吸気ダクト形成壁21と、大気と遮断する遮断壁22とで囲まれる空間からなる。
連通部20bは、図1に示すように、吸気ダクト40内と共鳴室20aとを連通させる連通管23を吸気ダクト形成壁21から共鳴室20a内に延びて設けることで構成される。連通部20bは、連通管23の内側に位置する部分である。連通管23は、吸気ダクト40内を流れる吸気の流れ方向と直交する方向に、直線状または略直線状に延びている。
The Helmholtz type silencer 20 includes a resonance chamber 20a and a communication portion 20b.
As shown in FIG. 2, the resonance chamber 20 a includes a space surrounded by an intake duct forming wall 21 that forms a part of the intake duct 40 and a blocking wall 22 that blocks the atmosphere.
As shown in FIG. 1, the communication portion 20 b is configured by providing a communication pipe 23 that connects the intake duct 40 and the resonance chamber 20 a so as to extend from the intake duct forming wall 21 into the resonance chamber 20 a. The communication part 20 b is a part located inside the communication pipe 23. The communication pipe 23 extends linearly or substantially linearly in a direction orthogonal to the flow direction of the intake air flowing through the intake duct 40.

サイドブランチタイプ消音器30は、吸気ダクト形成壁21から共鳴室20a内に突出する有底筒状壁31にて構成される。有低筒状壁31は、吸気ダクト形成壁21から共鳴室20a内に、吸気ダクト40内を流れる吸気の流れ方向と直交する方向またはほぼ直交する方向に直線状または略直線状に突出している。有底筒状壁31は、吸気ダクト40内を流れる吸気の流れ方向で連通管23が設けられる部位とは異なる部位に設けられている。有底筒状壁31と遮断壁22との間には空間があり、有底筒状壁31は遮断壁22に非接触とされている。   The side branch type silencer 30 includes a bottomed cylindrical wall 31 protruding from the intake duct forming wall 21 into the resonance chamber 20a. The low-cylindrical wall 31 projects linearly or substantially linearly from the intake duct forming wall 21 into the resonance chamber 20a in a direction perpendicular to or substantially perpendicular to the flow direction of the intake air flowing through the intake duct 40. . The bottomed cylindrical wall 31 is provided at a site different from the site where the communication pipe 23 is provided in the flow direction of the intake air flowing through the intake duct 40. There is a space between the bottomed cylindrical wall 31 and the blocking wall 22, and the bottomed cylindrical wall 31 is not in contact with the blocking wall 22.

消音装置10は、図4に示すように、それぞれ別々に形成されて一体にされる第1〜第3のピース11,12,13を備えている。
第1のピース11には、図3に示すように、吸気ダクト形成壁21と、遮断壁22の一部22aと、連通管23と、有底筒状壁31の一部31aとが、形成されている。
第2のピース12には、図4に示すように、遮断壁22の前記一部22aとは異なるさらなる一部22bと、有底筒状壁31の前記一部31a以外の残余の部分31bとが、形成されている。遮断壁22の前記一部22aとは異なるさらなる一部22bと、有底筒状壁31の前記一部31a以外の残余の部分31bとの間には、図示略のリブが設けられている。
第3のピース13には、遮断壁22の前記一部22a、22b以外の残余の部分22cが形成されている。
As shown in FIG. 4, the silencer 10 includes first to third pieces 11, 12, and 13 that are separately formed and integrated.
As shown in FIG. 3, the first piece 11 is formed with an intake duct forming wall 21, a part 22 a of the blocking wall 22, a communication pipe 23, and a part 31 a of the bottomed cylindrical wall 31. Has been.
As shown in FIG. 4, the second piece 12 includes a further portion 22 b different from the portion 22 a of the blocking wall 22, and a remaining portion 31 b other than the portion 31 a of the bottomed cylindrical wall 31. Is formed. A rib (not shown) is provided between a further portion 22 b different from the portion 22 a of the blocking wall 22 and a remaining portion 31 b of the bottomed cylindrical wall 31 other than the portion 31 a.
In the third piece 13, a remaining portion 22 c other than the portions 22 a and 22 b of the blocking wall 22 is formed.

ここで、本発明実施例の消音装置10の製造方法を説明する。
消音層10の製造方法は、
(i) 第1のピース11を図示略の金型内にセットした状態で吸気ダクト40を成形することで、第1のピース11と吸気ダクト40を固定する(第1のピース11を吸気ダクト40にインサート成形する)工程と、
(ii) 第2のピース12を接着または溶着等により第1のピース11に固定する工程と、
(iii) 第3のピース13を接着または溶着等により第2のピース12に固定する工程と、
を有する。
Here, the manufacturing method of the silencer 10 of the embodiment of the present invention will be described.
The manufacturing method of the sound deadening layer 10 is
(I) The first piece 11 and the intake duct 40 are fixed by molding the intake duct 40 with the first piece 11 set in a mold (not shown) (the first piece 11 is fixed to the intake duct). 40 insert molding), and
(Ii) fixing the second piece 12 to the first piece 11 by bonding or welding,
(Iii) fixing the third piece 13 to the second piece 12 by bonding or welding,
Have

つぎに、本発明実施例の消音装置10の作用を説明する。
本発明実施例では、サイドブランチタイプ消音器30を構成する有底通常壁31がヘルムホルツタイプ消音器20の共鳴室20aの大気との遮断壁22に非接触とされているため、有底筒状壁31が遮断壁22に固定されている場合(接触している場合)に比べて、有底筒状壁31の振動が遮断壁22に伝わり難い。そのため、従来に比べて、サイドブランチタイプ消音器30を構成する有底筒状壁31の振動がヘルムホルツタイプ消音器20の外部に放射音として出ていってしまうことを抑制できる。
Next, the operation of the silencer 10 of the embodiment of the present invention will be described.
In the embodiment of the present invention, the bottomed normal wall 31 constituting the side branch type silencer 30 is not in contact with the shielding wall 22 with the atmosphere of the resonance chamber 20a of the Helmholtz type silencer 20, so that the bottomed cylindrical shape is formed. The vibration of the bottomed cylindrical wall 31 is less likely to be transmitted to the blocking wall 22 than when the wall 31 is fixed to the blocking wall 22 (when in contact). Therefore, it is possible to suppress the vibration of the bottomed cylindrical wall 31 constituting the side branch type silencer 30 from being emitted as radiated sound outside the Helmholtz type silencer 20 as compared with the conventional case.

サイドブランチタイプ消音器30を構成する有底通常壁31がヘルムホルツタイプ消音器20の共鳴室20aの大気との遮断壁22に非接触とされているため、有底筒状壁31の長さが短く遮断壁22に達しない場合であっても、遮断壁22を凹ます必要はない。その結果、有底筒状壁31の底壁部31cと遮断壁22のうち底壁部31cに対向する部分との間の空間をヘルムホルツタイプ消音器20の共鳴室20aとして活用でき、従来に比べて共鳴室20aの容積を大にすることができる。   Since the bottomed normal wall 31 constituting the side branch type silencer 30 is not in contact with the shielding wall 22 with the atmosphere of the resonance chamber 20a of the Helmholtz type silencer 20, the length of the bottomed cylindrical wall 31 is Even when the barrier wall 22 is short, the barrier wall 22 does not need to be recessed. As a result, the space between the bottom wall portion 31c of the bottomed cylindrical wall 31 and the portion of the blocking wall 22 facing the bottom wall portion 31c can be used as the resonance chamber 20a of the Helmholtz type silencer 20, compared to the conventional case. Thus, the volume of the resonance chamber 20a can be increased.

消音装置10がそれぞれ別々に形成されて一体にされる第1〜第3のピース11,12,13を備えているため、第1〜第3のピース11,12,13を容易に成形できる形状にすることにより、容易に消音装置10を製造できる。   Since the silencer 10 includes first to third pieces 11, 12, and 13 that are separately formed and integrated, a shape that can easily form the first to third pieces 11, 12, and 13. By doing so, the silencer 10 can be easily manufactured.

本発明実施例の消音装置の平面図である。It is a top view of the silencer of the example of the present invention. 図1のA−A線断面図である。It is the sectional view on the AA line of FIG. 本発明実施例の消音装置の、第1のピース11の斜視図である。It is a perspective view of the 1st piece 11 of the silencer of an example of the present invention. 本発明実施例の消音装置の、第3のピースを第2のピースに固定する前の状態の斜視図である。It is a perspective view of the state before fixing the 3rd piece to the 2nd piece of the silencer of the example of the present invention. 従来の消音装置の、サイドブランチタイプ消音器を構成する有底筒状壁の底壁部とヘルムホルツタイプ消音器の遮断壁とを係合固定するために、遮断壁を凹ませた場合の、断面図である。A cross section of a conventional silencer when the barrier wall is recessed to engage and fix the bottom wall of the bottomed cylindrical wall constituting the side branch type silencer and the barrier wall of the Helmholtz type silencer. FIG.

符号の説明Explanation of symbols

10 消音装置
11 第1のピース
12 第2のピース
13 第3のピース
20 ヘルムホルツタイプ消音器
20a 共鳴室
20b 連通部
21 吸気ダクト形成壁
22 遮断壁
23 連通管
30 サイドブランチタイプ消音器
31 有低筒状壁
40 吸気ダクト
DESCRIPTION OF SYMBOLS 10 Silencer 11 1st piece 12 2nd piece 13 3rd piece 20 Helmholtz type silencer 20a Resonance chamber 20b Communication part 21 Intake duct formation wall 22 Blocking wall 23 Communication pipe 30 Side branch type silencer 31 Low cylinder Shaped wall 40 Intake duct

Claims (1)

(a)吸気ダクトの一部を形成する吸気ダクト形成壁と大気と遮断する遮断壁とで囲まれる空間からなる共鳴室と、前記吸気ダクト内と前記共鳴室とを連通させる連通管を前記吸気ダクト形成壁から前記共鳴室内に延びて設けることで構成される連通部と、を備えるヘルムホルツタイプ消音器と、
(b)前記吸気ダクト形成壁から前記共鳴室内に突出する有底筒状壁にて構成されるサイドブランチタイプ消音器と、
を有し、
前記サイドブランチタイプ消音器を構成する有底筒状壁は、前記ヘルムホルツタイプ消音器の共鳴室の大気との遮断壁に非接触とされている消音装置であって、
前記消音装置は、別々に形成されて一体にされる第1、第2、第3のピースを備えており、
前記第1のピースに、前記吸気ダクト形成壁と前記遮断壁の一部と前記連通管と前記有底筒状壁の一部が形成されており、
前記第2のピースに、前記遮断壁の一部とは異なるさらなる一部と、前記有底筒状壁の残余の部分が形成されており、
前記第3のピースに、前記遮断壁の残余の部分が形成されている、消音装置。
(A) A resonance chamber composed of a space surrounded by an intake duct forming wall that forms a part of the intake duct and a blocking wall that blocks the atmosphere, and a communication pipe that communicates the inside of the intake duct and the resonance chamber with the intake air. A Helmholtz type silencer comprising: a communicating portion configured to extend from a duct forming wall into the resonance chamber; and
(B) a side branch type silencer configured by a bottomed cylindrical wall protruding from the intake duct forming wall into the resonance chamber;
Have
The bottomed cylindrical wall constituting the side branch type silencer is a silencer that is not in contact with the barrier wall with the atmosphere of the resonance chamber of the Helmholtz type silencer ,
The silencer includes first, second, and third pieces that are separately formed and integrated.
In the first piece, the intake duct forming wall, a part of the blocking wall, the communication pipe, and a part of the bottomed cylindrical wall are formed,
In the second piece, a further part different from the part of the blocking wall and a remaining part of the bottomed cylindrical wall are formed,
The silencer, wherein the remaining part of the blocking wall is formed on the third piece.
JP2006275545A 2006-10-06 2006-10-06 Silencer Active JP4799355B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006275545A JP4799355B2 (en) 2006-10-06 2006-10-06 Silencer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006275545A JP4799355B2 (en) 2006-10-06 2006-10-06 Silencer

Publications (2)

Publication Number Publication Date
JP2008095555A JP2008095555A (en) 2008-04-24
JP4799355B2 true JP4799355B2 (en) 2011-10-26

Family

ID=39378666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006275545A Active JP4799355B2 (en) 2006-10-06 2006-10-06 Silencer

Country Status (1)

Country Link
JP (1) JP4799355B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9972298B2 (en) 2014-04-28 2018-05-15 Ricoh Company, Limited Sound absorbing device, electronic device, and image forming apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101207803B1 (en) 2010-12-20 2012-12-04 주식회사 리한 Resonator assembly for vehicle
JP7420459B2 (en) 2021-10-21 2024-01-23 ダイハツ工業株式会社 vehicle intake system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0653756U (en) * 1992-12-25 1994-07-22 ダイハツ工業株式会社 Air intake duct noise absorber
JP3464873B2 (en) * 1996-08-09 2003-11-10 豊田合成株式会社 Silencer
JP3953437B2 (en) * 2003-04-09 2007-08-08 愛三工業株式会社 Resin intake manifold

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9972298B2 (en) 2014-04-28 2018-05-15 Ricoh Company, Limited Sound absorbing device, electronic device, and image forming apparatus
US10332500B2 (en) 2014-04-28 2019-06-25 Ricoh Company, Limited Sound absorbing device, electronic device, and image forming apparatus
US10720134B2 (en) 2014-04-28 2020-07-21 Ricoh Company, Limited Sound absorbing device, electronic device, and image forming apparatus
US10943575B2 (en) 2014-04-28 2021-03-09 Ricoh Company, Limited Sound absorbing device, electronic device, and image forming apparatus

Also Published As

Publication number Publication date
JP2008095555A (en) 2008-04-24

Similar Documents

Publication Publication Date Title
US8172039B2 (en) Muffler for vehicle
JP4968096B2 (en) Intake device for internal combustion engine for vehicle
JP4799355B2 (en) Silencer
US20090301423A1 (en) Intake manifold
JP4731452B2 (en) Silencer
US6155225A (en) Vehicle engine intake muffler
JPS61190158A (en) Intake system silencer for internal-combustion engine
JP5525276B2 (en) Intake device for internal combustion engine
JP6899278B2 (en) Silencer
JP5859371B2 (en) Air intake duct with silencer
JPH078516U (en) Resonant submuffler
JP6169035B2 (en) Silencer structure for exhaust noise of fuel cell vehicles
JP2002021657A (en) Intake duct for internal combustion engine and its manufacturing method
JP3685294B2 (en) Intake silencer
KR100820703B1 (en) Resonator
JP2007270687A (en) Torque increase resonator
JP6823903B2 (en) Silencer
JP2003322062A (en) Suction duct
JP5400709B2 (en) Intake device for internal combustion engine
JPH0510775U (en) Intake noise reduction device for internal combustion engine
JP2009236040A (en) Exhaust muffler
JP2008303736A (en) Gas conduit
JPS6113699Y2 (en)
JP2010019172A (en) Intake member
JP2006063928A (en) Fresh air introduction passage for blow-by gas ventilation

Legal Events

Date Code Title Description
A625 Written request for application examination (by other person)

Free format text: JAPANESE INTERMEDIATE CODE: A625

Effective date: 20090529

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20090619

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20090619

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101203

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101214

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20110412

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110706

A911 Transfer to examiner for re-examination before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20110713

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110802

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110802

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140812

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4799355

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250