JP2006214425A - Muffler - Google Patents

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Publication number
JP2006214425A
JP2006214425A JP2005061460A JP2005061460A JP2006214425A JP 2006214425 A JP2006214425 A JP 2006214425A JP 2005061460 A JP2005061460 A JP 2005061460A JP 2005061460 A JP2005061460 A JP 2005061460A JP 2006214425 A JP2006214425 A JP 2006214425A
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Japan
Prior art keywords
silencer
passage
lead
exhaust gas
valve
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JP2005061460A
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Japanese (ja)
Inventor
Fumihiko Mizuno
文彦 水野
Norihiko Sawada
憲彦 澤田
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Sango Co Ltd
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Sango Co Ltd
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Priority to JP2005061460A priority Critical patent/JP2006214425A/en
Publication of JP2006214425A publication Critical patent/JP2006214425A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a muffler restricted in adhesion of a valve by quickly discharging condensate accumulated inside the muffler, in a muffler having both of quietness and power performance. <P>SOLUTION: A plurality of lead-out passages for leading out exhaust gas from the muffler 1 are provided, and at least one of the lead-out passages is used as a main lead-out passage opened always and at least one of them is used as an auxiliary lead-out passage by providing a valve. Furthermore, the main lead-out passage 10 is arranged lower than the auxiliary lead-out passage 11 when mounting on a vehicle. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は内燃機関を搭載した車両などの排気系に設けられる消音器に関する。  The present invention relates to a silencer provided in an exhaust system of a vehicle or the like equipped with an internal combustion engine.

従来、内燃機関を搭載した車両などの排気系には、排気騒音を低減する目的で消音器が設けられている。消音器には、消音器に排気ガスを導入する導入通路と消音器から排気ガスを導出する導出通路が設けられている。近時、静粛性と動力性能を満足するため、導出通路を複数設け、導出通路のうち少なくとも1つを排気ガスが常時流通可能な主導出通路とするとともに、導出通路のうち少なくとも1つをバルブを設けて排気ガスの流通を制御可能にした副導出通路とした消音器が提案されている。(特許文献1参照)
特開平7−310521
Conventionally, a silencer is provided in an exhaust system of a vehicle or the like equipped with an internal combustion engine for the purpose of reducing exhaust noise. The silencer is provided with an introduction passage for introducing exhaust gas into the silencer and a lead-out passage for extracting exhaust gas from the silencer. Recently, in order to satisfy quietness and power performance, a plurality of outlet passages are provided, at least one of the outlet passages is a main outlet passage through which exhaust gas can always flow, and at least one of the outlet passages is a valve. There has been proposed a silencer as a sub lead-out passage that is provided with a control passage to control the flow of exhaust gas. (See Patent Document 1)
JP 7-310521 A

しかし、消音器内には排気ガス中の水分が冷却された際に生成される凝縮水が蓄積されることがあった。このため、上記特許文献1記載の消音器においては、消音器内に蓄積された凝縮水が凍結してバルブの固着を引き起こす惧れがあった。  However, condensed water generated when moisture in the exhaust gas is cooled may accumulate in the silencer. For this reason, in the silencer described in Patent Document 1, the condensed water accumulated in the silencer may freeze and cause the valve to stick.

前記の課題を解決するために、請求項1記載の発明は、消音器から排気ガスを導出する導出通路を複数備え、該導出通路のうち少なくとも1つを常時開放された主導出通路とするとともに、少なくとも1つをバルブを設けた副導出通路とした消音器において、前記主導出通路を前記副導出通路より搭載状態において下方に配設したことを特徴とする消音器である。  In order to solve the above problems, the invention according to claim 1 is provided with a plurality of outlet passages for leading exhaust gas from the silencer, and at least one of the outlet passages is a main outlet passage that is always open. A silencer using a sub lead-out passage provided with at least one valve, wherein the main lead-out passage is disposed below the sub lead-out passage in a mounted state.

請求項2記載の発明は、請求項1記載の発明において、消音器に排気ガスを導入する導入通路を前記副導出通路より搭載状態において下方に配設したことを特徴とする消音器である。  According to a second aspect of the present invention, in the first aspect of the present invention, the silencer is characterized in that an introduction passage for introducing exhaust gas into the silencer is disposed below the auxiliary lead-out passage in a mounted state.

請求項1記載の発明によれば、消音器内に蓄積される凝縮水が主導出通路から消音器外に排出され易いたため、バルブの固着を抑制することができる。  According to the first aspect of the present invention, since the condensed water accumulated in the silencer is easily discharged from the main outlet passage to the outside of the silencer, sticking of the valve can be suppressed.

請求項2記載の発明によれば、一層バルブの固着を一層抑制することができる。  According to the second aspect of the present invention, the sticking of the valve can be further suppressed.

本発明を実施するための最良の形態を図1乃至図2に示す実施例に基づいて説明する。  The best mode for carrying out the present invention will be described based on the embodiment shown in FIGS.

図1は、実施例1の消音器1を示すもので、(a)搭載状態における側面断面図、(b)は(a)におけるA−A線断面図である。  1A and 1B show a silencer 1 according to a first embodiment. FIG. 1A is a side sectional view in a mounted state, and FIG. 1B is a sectional view taken along line AA in FIG.

消音器1は、図上方が車両などへの搭載状態において上方となるように記載されている。箱状のケーシング2内はセパレータ3,4により区画されて消音室5,6および7が形成されている。セパレータ3,4の下方端にはドレン孔3a,4aが形成されて、消音器1内で凝縮した凝縮水が各消音室を移動可能になっている。また、セパレータ3には複数の連通孔3bが形成されて、消音室5,6間を排気ガスが移動可能になっている。  The silencer 1 is described so that the upper side in the figure is the upper side when mounted on a vehicle or the like. The box-shaped casing 2 is partitioned by separators 3 and 4 to form sound deadening chambers 5, 6 and 7. Drain holes 3a and 4a are formed at the lower ends of the separators 3 and 4 so that the condensed water condensed in the silencer 1 can move through the respective silencer chambers. The separator 3 is formed with a plurality of communication holes 3 b so that the exhaust gas can move between the sound deadening chambers 5 and 6.

消音器1に排気ガスを導入する導入通路8が、ケーシング2およびセパレータ3,4を貫通するとともに、下流開口端8bが消音室7に開口するように設けられている。導入通路8の上流開口端8aには図示しない上流側排気管が接続される。また、導入通路8の側面の一部には消音室6に連通する小孔9が形成されている。  An introduction passage 8 for introducing exhaust gas into the silencer 1 is provided so as to pass through the casing 2 and the separators 3 and 4, and the downstream opening end 8 b opens into the silencer chamber 7. An upstream exhaust pipe (not shown) is connected to the upstream opening end 8 a of the introduction passage 8. A small hole 9 communicating with the sound deadening chamber 6 is formed in a part of the side surface of the introduction passage 8.

消音器1から排気ガスを導出する主導出通路10が、ケーシング2およびセパレータ3,4を貫通するとともに、上流開口端10aが消音室5に開口するように設けられている。主導出通路10の下流開口端10bには図示しない下流側排気管が接続される。  A main lead-out passage 10 for leading the exhaust gas from the silencer 1 is provided so as to pass through the casing 2 and the separators 3 and 4, and the upstream opening end 10 a opens into the silencer chamber 5. A downstream exhaust pipe (not shown) is connected to the downstream opening end 10 b of the main outlet passage 10.

消音器1から排気ガスを導出する副導出通路11が、ケーシング2およびセパレータ4を貫通するとともに、上流開口端11aが消音室6に開口するように設けられている。副排出通路11の下流開口端11bには図示しない下流側排気管が接続される。なお、本実施例1に示したように、主排出通路10の最上点が副排出通路11の最下点より下方になるように配設することが望ましい。  A sub lead-out passage 11 for leading the exhaust gas from the silencer 1 is provided so as to penetrate the casing 2 and the separator 4, and the upstream opening end 11 a opens to the sound deadening chamber 6. A downstream exhaust pipe (not shown) is connected to the downstream opening end 11 b of the sub-discharge passage 11. Note that, as shown in the first embodiment, it is desirable that the uppermost point of the main discharge passage 10 is disposed below the lowermost point of the sub discharge passage 11.

副排出通路11の上流端部には、支軸13を中心に回動可能なバタフライ型のバルブ12が設けられている。また、バルブ12は付勢体14により副排出通路11の上流開口端11aを閉塞する方向に付勢されるとともに、消音室6の背圧に応じて上流開口端11aを開放するように設定されている。  A butterfly valve 12 that is rotatable about a support shaft 13 is provided at the upstream end of the sub discharge passage 11. The valve 12 is urged by the urging body 14 in a direction to close the upstream opening end 11 a of the sub-discharge passage 11 and is set to open the upstream opening end 11 a according to the back pressure of the muffler chamber 6. ing.

次に本実施例1の作用について説明する。導入通路8により消音器1に導かれた排気ガスは、小孔9から消音室6に導かれる。排気ガス流量が少なく消音室6の背圧が低い時には、バルブ12により副排出通路11の上流開口端11aが閉塞されているため、排気ガスは連通孔3bを通って消音室5に導かれる。その後、上流開口端10aが常時開放されている主排出通路10を通って消音器1外へ導かれる。また、排気ガス流量が多く消音室6の背圧が高い時には、副排出通路11の上流開口端11aが開放されているため、排気ガスの一部は副排出通路11を通って消音器1外へ導かれる。  Next, the operation of the first embodiment will be described. The exhaust gas guided to the silencer 1 by the introduction passage 8 is guided from the small hole 9 to the silencer chamber 6. When the exhaust gas flow rate is small and the back pressure of the silencing chamber 6 is low, the upstream opening end 11a of the sub-discharge passage 11 is closed by the valve 12, so that the exhaust gas is guided to the silencing chamber 5 through the communication hole 3b. Thereafter, the upstream open end 10a is led out of the silencer 1 through the main discharge passage 10 which is always open. Further, when the exhaust gas flow rate is large and the back pressure of the sound deadening chamber 6 is high, the upstream opening end 11a of the sub discharge passage 11 is opened, so that a part of the exhaust gas passes through the sub discharge passage 11 and is outside the silencer 1. Led to.

一方、排気ガス中には水分が存在し、排気ガスが冷却された際に凝縮水となって消音器1内に蓄積されることがあった。さらに、凝縮水が凍結してバルブが固着することがあった。本実施例1においては、常時開放され常時排気ガスが流通可能な主導出通路10が副排出通路11より搭載状態において下方に配設されているため、消音器内に蓄積された凝縮水が速やかに消音器外に排出される。このため、バルブが固着することを抑制することができる。  On the other hand, moisture exists in the exhaust gas, and when the exhaust gas is cooled, condensed water may be accumulated in the silencer 1. Further, the condensed water may freeze and the valve may stick. In the first embodiment, the main outlet passage 10 that is always open and allows the exhaust gas to flow constantly is disposed below the auxiliary discharge passage 11 in the mounted state, so that the condensed water accumulated in the silencer is quickly Is discharged outside the silencer. For this reason, it can suppress that a valve sticks.

図2は、実施例2の消音器21を示すもので、(a)搭載状態における側面断面図、(b)は(a)におけるB−B線断面図である。  2A and 2B show the silencer 21 according to the second embodiment. FIG. 2A is a side cross-sectional view in a mounted state, and FIG.

実施例2においては、副導出通路31が導入通路28より上方に配設されている。その他の構成については実施例1と同様であるため同一の符号を付与し、その説明を省略する。なお、実施例2の消音器21も図上方が搭載状態において上方となるように記載されている。  In the second embodiment, the sub lead-out passage 31 is disposed above the introduction passage 28. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and the description thereof is omitted. The silencer 21 of the second embodiment is also described so that the upper side in the figure is the upper side in the mounted state.

実施例2においても実施例1と同様の効果を発揮する。さらに、、副導出通路31が導入通路28より上方に配設されているため、一層バルブの固着を抑制することができる。  Also in Example 2, the same effect as Example 1 is exhibited. Furthermore, since the sub lead-out passage 31 is disposed above the introduction passage 28, sticking of the valve can be further suppressed.

なお、上記実施例においては、主導出通路および副導出通路を1づつ設けたが、それぞれ複数設けるようにしてもよい。また、バタフライ型バルブに限らず周知のバルブを任意の位置に設けてもよい。さらに、バルブの駆動手段および制御手段に関しても周知の方法を採用することができる。その他、消音室の構成などについても任意のものとすることができる。  In the above embodiment, one main derivation passage and one sub derivation passage are provided, but a plurality of each may be provided. Moreover, you may provide not only a butterfly type valve but a well-known valve | bulb in arbitrary positions. Further, a well-known method can be adopted for the drive means and control means of the valve. In addition, the structure of the muffler chamber can be arbitrarily set.

本発明の実施例1の消音器を示すもので(a)は搭載状態における側面断面図、(b)は(a)におけるA−A線断面図。BRIEF DESCRIPTION OF THE DRAWINGS The silencer of Example 1 of this invention is shown, (a) is side surface sectional drawing in a mounting state, (b) is the sectional view on the AA line in (a). 本発明の実施例2の消音器を示すもので(a)は搭載状態における側面断面図、(b)は(a)におけるB−B線断面図。The silencer of Example 2 of this invention is shown, (a) is side surface sectional drawing in a mounting state, (b) is BB sectional drawing in (a).

符号の説明Explanation of symbols

1,21 消音器
8,28 導入通路
10 主排出通路
11,31 副排出通路
12 バルブ
1,21 Silencer 8,28 Introduction passage 10 Main discharge passage 11,31 Sub discharge passage 12 Valve

Claims (2)

消音器から排気ガスを導出する導出通路を複数備え、該導出通路のうち少なくとも1つを常時開放された主導出通路とするとともに、少なくとも1つをバルブを設けた副導出通路とした消音器において、前記主導出通路を前記副導出通路より搭載状態において下方に配設したことを特徴とする消音器。A silencer comprising a plurality of outlet passages for leading exhaust gas from a silencer, wherein at least one of the outlet passages is a main outlet passage that is always open, and at least one of the outlet passages is a secondary outlet passage provided with a valve. The muffler, wherein the main lead-out passage is disposed below the sub lead-out passage in a mounted state. 消音器に排気ガスを導入する導入通路を前記副導出通路より搭載状態において下方に配設したことを特徴とする請求項1記載の消音器。2. The silencer according to claim 1, wherein an introduction passage for introducing exhaust gas into the silencer is disposed below the auxiliary lead-out passage in a mounted state.
JP2005061460A 2005-02-04 2005-02-04 Muffler Withdrawn JP2006214425A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010255519A (en) * 2009-04-24 2010-11-11 Honda Motor Co Ltd Muffler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010255519A (en) * 2009-04-24 2010-11-11 Honda Motor Co Ltd Muffler

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Effective date: 20080513