WO2013035566A1 - 排気消音装置 - Google Patents
排気消音装置 Download PDFInfo
- Publication number
- WO2013035566A1 WO2013035566A1 PCT/JP2012/071545 JP2012071545W WO2013035566A1 WO 2013035566 A1 WO2013035566 A1 WO 2013035566A1 JP 2012071545 W JP2012071545 W JP 2012071545W WO 2013035566 A1 WO2013035566 A1 WO 2013035566A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- silencer
- silencer body
- outlet pipe
- exhaust
- exhaust gas
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/02—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate silencers in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/005—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for draining or otherwise eliminating condensates or moisture accumulating in the apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/20—Dimensional characteristics of tubes, e.g. length, diameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2490/00—Structure, disposition or shape of gas-chambers
- F01N2490/02—Two or more expansion chambers in series connected by means of tubes
- F01N2490/06—Two or more expansion chambers in series connected by means of tubes the gases flowing longitudinally from inlet to outlet in opposite directions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2490/00—Structure, disposition or shape of gas-chambers
- F01N2490/08—Two or more expansion chambers in series separated by apertured walls only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2490/00—Structure, disposition or shape of gas-chambers
- F01N2490/10—Two or more expansion chambers in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1628—Moisture amount in exhaust apparatus
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- 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 present invention relates to an exhaust silencer connected to an exhaust system of an engine for a vehicle or the like, in particular, the effect of reducing exhaust resistance due to the use of two outlet pipes provided in the silencer main body is hindered by the storage of condensed water.
- the present invention relates to an exhaust silencer that prevents the occurrence of noise.
- the exhaust silencer shown in FIG. 1 has a silencer body (silencer) and an inlet pipe (exhaust gas) that has an opening that opens into the silencer body at the downstream end and guides exhaust gas from the engine into the silencer body.
- Tube 2 and a short outlet pipe (tail pipe) 11 and a long outlet pipe (having an opening opening in the silencer body at the upstream end, and discharging exhaust gas in the silencer body to the outside of the silencer body)
- An exhaust silencer having two outlet pipes, each of which has an opening 12a of the long outlet pipe 12 and a short outlet pie. 11, the condensed water stored on the bottom surface of the silencer as the exhaust gas is cooled is discharged to the outside mainly through the short outlet pipe and flows into the long outlet pipe. Condensed water is reduced.
- the present invention has been made in view of such circumstances, and is capable of reliably preventing the effect of reducing the exhaust resistance due to the dual outlet pipe from being hindered by the storage of condensed water in the outlet pipe. It is an object to provide a simple exhaust silencer.
- the present invention provides a silencer body, an inlet pipe having an opening in the silencer body at the downstream end, leading exhaust gas from the engine to the silencer body, and a silencer at the upstream end.
- An exhaust silencer comprising: an opening that opens in the main body of the instrument, and two outlet pipes that exhaust the exhaust gas in the silencer main body to the outside of the silencer main body.
- the two outlet pipes are disposed within the silencer body along the bottom surface of the silencer body so that the distance from the bottom of the bottom face is substantially equal.
- the opening of one outlet pipe is connected to the other outlet pipe.
- the first feature is that the sound is directed to the bottom surface side of the silencer body with respect to the opening.
- the present invention is the one having the first feature, wherein the silencer body is inclined upward from the upstream side of the silencer body in the exhaust gas flow direction toward the downstream side of the silencer body.
- the openings of the one and other outlet pipes are on the upstream side in the silencer body, and the opening of the one outlet pipe is inclined downward from the upstream side toward the downstream side.
- the present invention is the one having the first feature, wherein the two outlet pipes are formed in an S shape and are respectively disposed on both sides in the longitudinal direction in the silencer body.
- the outlet pipe on the upstream side of the outlet pipe is arranged at substantially equal distances from the bottom of the bottom surface along the bottom surface of the silencer body, and an opening formed at the upstream end of one and the other outlet pipes is
- the third feature is that the silencer body is disposed at the center in the longitudinal direction.
- the condensed water when the amount of condensed water stored on the bottom surface of the silencer body is small, the condensed water is efficiently discharged from the one outlet pipe to the outside of the silencer body.
- the ability to discharge the condensed water from the other outlet pipe is remarkably increased. In order to improve, the high state of the water surface is quickly eliminated. Therefore, it is possible to reliably prevent the effect of reducing the exhaust resistance due to the use of two outlet pipes from being hindered by condensate storage.
- a small amount of condensed water stored on the bottom surface of the silencer main body is quickly collected on the upstream side of the silencer main body, and the opening portion extends from the upstream side to the downstream side. Through one outlet pipe that is inclined downward, it can be discharged quickly and efficiently with little resistance.
- the condensed water stored in the silencer body is discharged from the longitudinal center of the silencer body to the outside from one end or the other end in the longitudinal direction. Even in the case of a slender silencer body, the condensed water stored therein can be discharged quickly, and the condensate storage further hinders the effect of reducing the exhaust resistance due to the use of two outlet pipes. It can be surely prevented.
- FIG. 1 is a view showing an exhaust system provided with the exhaust silencer of the present invention.
- FIG. 2 is an enlarged sectional view taken along line 2-2 in FIG.
- First embodiment 3 is a cross-sectional view taken along line 3-3 in FIG.
- First embodiment 4 is a cross-sectional view taken along line 4-4 of FIG.
- FIG. 5 is a view showing an exhaust system provided with the exhaust silencer of the present invention.
- FIG. 6 is an enlarged cross-sectional view taken along line 6-6 of FIG.
- FIG. 7 is a sectional view taken along line 7-7 in FIG.
- FIG. 8 is an enlarged sectional view taken along line 8-8 in FIG.
- FIG. 9 is an enlarged sectional view taken along line 9-9 of FIG. (Second embodiment)
- FIG. 10 is a perspective view taken along arrow 10 in FIG. (Second embodiment)
- FIG. 11 is a partially enlarged view taken along arrow 11 in FIG. (Second embodiment)
- front and rear, left and right, and top and bottom are referred to based on the forward direction of the automobile on which the exhaust system is mounted.
- This first embodiment is a case where the exhaust silencer of the present invention is applied to a silencer that is placed vertically (arranged in the front-rear direction) in an exhaust system mounted on an automobile.
- a catalyst CA, auxiliary silencers (pre-chambers) MA and MR, and a main silencer MM are arranged in series from the upstream side to the downstream side of the exhaust pipe Pe in the exhaust system Ex of the automotive 6-cylinder engine E.
- Exhaust gas that is connected and mounted on the car body and exhausted from the 6-cylinder engine E passes through the catalyst CA, and after purifying harmful components such as HC, CO, and NOx, the auxiliary silencers MA and MR are turned on. Then, the auxiliary sound is silenced and the main sound is silenced through the main silencer MM and discharged to the atmosphere.
- the main silencer MM is inclined upward from the upstream side of the main silencer MM in the exhaust gas flow direction toward the downstream side of the main silencer MM, and is arranged vertically (the longitudinal direction is arranged in the front-rear direction).
- the silencer body 1 constituting the outer shell is composed of an oval cylindrical body portion 2 and front and rear end plates 3 and 4 before closing both front and rear opening ends of the body portion 2.
- the outer peripheral edges of the rear end plates 3 and 4 are fixed by caulking to the outer peripheral surface of the front and rear ends of the body 2 over the entire periphery.
- a separator 5 for partitioning the expansion chamber in the silencer body 1 in the longitudinal direction is provided at an intermediate portion in the longitudinal direction of the silencer body 1.
- the separator 5 is provided with a communication pipe 6, and the communication pipe 6 communicates with the expansion chambers before and after being partitioned by the separator 5.
- a water inlet h is opened at the lower end of the separator 5.
- the silencer body 1 supports an inlet pipe 10 extending in the longitudinal direction through the expansion chamber at the upper part of the front half thereof.
- a front end (upstream end) of the inlet pipe 10 is supported through the front end plate 3 and connected to the exhaust pipe Pe, and is welded to the front end plate 3 together with the exhaust pipe Pe. Further, the downstream end (rear end) of the inlet pipe 10 penetrates the separator 5 and is welded thereto, and the downstream end opens into the expansion chamber.
- the inlet pipe 10 guides exhaust gas from the engine E to the expansion chamber in the silencer body 1.
- two pipes extending in the longitudinal direction in the expansion chamber that is, one outlet pipe 11 and the other outlet pipe 12 are juxtaposed in the left-right direction.
- One and the other outlet pipes 11 and 12 are supported by the separator 5 at their intermediate portions, and their downstream ends (rear ends) penetrate the rear end plate 4 and open to the outside. , 14 via connection pipes 15, 16 respectively.
- the upstream ends (front ends) of the one and other outlet pipes 11, 12 have openings 11 o, 12 o that open to the front of the expansion chamber of the silencer body 1, and flow into the silencer body 1.
- the exhaust gas silenced in the expansion chamber is guided to the outside.
- the one and the other outlet pipes 11 and 12 are arranged in the silencer body 1 along the bottom surface of the silencer body 1 so that the distances from the bottom of the bottom surface are substantially equal.
- the upstream end (front end) of one outlet pipe 11 is curved downward, and the opening 11o is inclined downward from the upstream side of the silencer main body 1 toward the downstream side (front side to rear side). Thus, it is directed to the bottom surface side of the silencer body 1 with respect to the opening 12 o of the other outlet pipe 12.
- the opening 12 o of the other outlet pipe 12 is oriented in the longitudinal direction of the silencer body 1 (a direction substantially parallel to the bottom surface of the silencer body 1).
- the exhaust gas generated by the operation of the engine E is led from the exhaust pipe Pe to the expansion chamber through the inlet pipe 10.
- the exhaust gas flowing into the expansion chamber flows from the rear portion of the expansion chamber through the communication pipe 6 to the front portion of the expansion chamber, and is silenced during that time.
- the silenced exhaust gas in the expansion chamber is diverted into the pipes 11 and 12 through the openings 11o and 12o of the two outlet pipes 11 and 12, that is, the tail pipes 13 and 14. It is discharged to the outside through.
- the exhaust gas flows through the one and other outlet pipes 11 and 12 in a diverted manner, thereby reducing the flow resistance of the exhaust gas.
- the exhaust silencer of the first embodiment discharges the condensed water to the outside through the following process.
- the silencer body 1 is configured such that the silencer body 1 in the exhaust gas flow direction is upstream from the silencer body 1 (exhaust pipe Pe side) and downstream of the silencer body 1 (tail pipes 13 and 14 side).
- a small amount of condensed water is collected on the upstream side (front part) of the silencer body 1, and the upstream ends of one and the other outlet pipes 11 and 12 are connected to the silencer.
- the upstream end of one outlet pipe 11 is curved downward, and the opening 11 o is opened from the upstream side of the silencer main body 1 in the exhaust gas flow direction. 1 so that the condensed water collected on the bottom surface on the upstream side (front) of the silencer body 1 can be quickly and efficiently discharged through one outlet pipe 11. it can.
- a substantial opening area of the opening 12o through which exhaust gas flows is provided.
- the amount of exhaust gas flowing through one outlet pipe 11 is reduced by the amount of exhaust gas flowing through the other outlet pipe 11 and the amount of exhaust gas flowing through the other outlet pipe 12 is increased.
- the flow rate of the exhaust gas flowing through is increased.
- the suction force for sucking the condensed water from the other outlet pipe 12 is increased, and a large amount of condensed water is sucked into the other outlet pipe 12 and discharged to the outside of the silencer body 1.
- This second embodiment is a case where the exhaust silencer of the present invention is applied to a main silencer MM that is horizontally placed (horizontally arranged in the left-right direction) on an exhaust system Ex mounted in an automobile.
- a catalyst CA, auxiliary silencers (pre-chambers) MA and MR, and a main silencer MM are arranged in series from the upstream side to the downstream side in the exhaust pipe Pe of the exhaust system Ex of the automotive 6-cylinder engine E.
- Exhaust gas that is connected and mounted on the car body and exhausted from the 6-cylinder engine E passes through the catalyst CA, and after purifying harmful components such as HC, CO, and NOx, the auxiliary silencers MA and MR are turned on. Then, the auxiliary sound is silenced and the main sound is silenced through the main silencer MM and discharged to the atmosphere.
- the main silencer MM is disposed substantially horizontally in the left-right direction (longitudinal direction) and slightly tilted forward and backward in the front-rear direction (width direction) (see FIGS. 8 and 9). Therefore, the below-mentioned condensed water stored in the main silencer MM is collected toward the front in the front-rear direction.
- the silencer main body 101 constituting the outer shell of the main silencer MM is composed of an oval cylindrical body portion 102 and left and right end plates 103 and 104 that close both left and right opening ends of the body portion 102.
- the outer peripheral edges of the rear end plates 103 and 104 are fixed to the outer peripheral surfaces of the front and rear ends of the body portion 102 by caulking over the entire periphery.
- the expansion chamber formed in the silencer main body 101 is partitioned in the longitudinal direction by four separators 105, 106, 107 and 108, and among these, two separators 106, A large number of small holes (punching holes) 120 are formed in 107 to reduce airflow noise in the exhaust gas.
- the two outer separators 105 and 108 are provided with larger holes 121 for improving the flow of exhaust gas (see FIG. 10).
- the expansion chambers are provided with the separators 105 to 108, the exhaust gas has a large number of small holes 120 formed in the separators 106 and 107 and large holes 121 formed in the separators 105 and 108. Therefore, the expansion chamber in the silencer body 101 substantially functions as one expansion chamber. Further, water outlets h are respectively opened at the lower ends of the plurality of separators 105, 106, 107, and 108.
- the exhaust gas introduction pipe 118 connected to the exhaust pipe Pe connected to the engine E is penetrated to the right end plate 104 from one end in the longitudinal direction of the silencer main body 101, and its downstream end is supported by the right end plate 104.
- the inlet pipe 110 in the expansion chamber is connected in communication.
- the inlet pipe 110 extending in the longitudinal direction is formed in a straighter shape from the upstream inlet pipe 110u and the downstream inlet pipe 110d that are connected to each other with a slight gap d therebetween.
- the upstream inlet pipe 110u is supported by the separators 107 and 108, and a large number of small holes (punching holes) 122 are opened between the right end plate 104 and the separator 108 in the upstream portion.
- the downstream inlet pipe 110 d is supported by the separators 105 and 106, and the downstream end thereof opens between the separator 105 and the left end plate 103 in the expansion chamber.
- the inlet pipe 110 discharges exhaust gas into the expansion chamber at both ends in the longitudinal direction of the expansion chamber, and the exhaust gas discharged into the expansion chamber at both ends reduces the exhaust noise due to expansion in the expansion chamber.
- two outlet pipes 111 and 112 are symmetrically formed on both sides of the longitudinal direction of the silencer body 101, and are bent in an S shape in the longitudinal direction of the expansion chamber. Has been placed.
- One outlet pipe 111 is supported through the separators 105 and 106, and has a straight upstream outlet pipe 111u extending in the longitudinal direction at the front portion (lower than the rear portion) of the silencer body 101 in the front-rear direction, and the silencer A straight downstream outlet pipe 111d extending in the longitudinal direction at the rear part in the front-rear direction of the main body 1 and an S-shaped intermediate outlet pipe 111n that connects the upstream and downstream outlet pipes 111u and 111d in communication with each other.
- the upstream end of the upstream outlet pipe 111u is at the center in the longitudinal direction of the expansion chamber, and is connected to a bowl-shaped inlet pipe 111i having an opening 111o directed to the bottom surface side of the silencer body 101. ing.
- the other outlet pipe 112 is supported by penetrating the separators 107 and 108, and has a straight upstream outlet pipe 112u extending in the longitudinal direction at the front part (lower than the rear part) in the front-rear direction of the silencer main body 101; A straight downstream outlet pipe 112d extending in the longitudinal direction at the rear part of the silencer body 1 in the front-rear direction, and an S-shaped intermediate outlet pipe 112n that connects the upstream and downstream outlet pipes 112u and 112d in communication with each other.
- the upstream end of the upstream outlet pipe 112u is located at the center of the expansion chamber in the longitudinal direction, and is directed to the longitudinal direction of the silencer body 101 (direction substantially parallel to the bottom surface of the silencer body 101).
- a bowl-shaped inlet pipe 112i having an opening 112o is connected.
- the upstream outlet pipe 111u of one outlet pipe 111 and the upstream outlet pipe 112u of the other outlet pipe 112 are disposed along the bottom surface of the silencer body 101 along the bottom surface thereof.
- the inlet pipe 111i of one outlet pipe 111 and the inlet pipe 112i of the other outlet pipe 112u are opposed to each other with a predetermined gap therebetween.
- the opening 111o of the inlet pipe 111i is directed to the bottom side with respect to the opening 112o of the other inlet pipe 112i.
- the downstream end of one outlet pipe 111 is supported through the left end plate 103 and connected to one tail pipe 113, and the downstream end of the other outlet pipe 112 is The exhaust gas is passed through and supported by the right end plate 104 and connected to the other tail pipe 114. After the exhaust gas in the expansion chamber is silenced in the expansion chamber, one outlet pipe 111 and one tail pipe 113 from the center thereof. Then, it is discharged to the outside through the other outlet pipe 112 and the other tail pipe 114.
- Exhaust gas generated by the operation of the engine E flows into the inlet pipe 110 in the silencer body 101 from the exhaust pipe Pe through the exhaust introduction pipe 118 from the right side in the longitudinal direction of the silencer body 101.
- the inlet pipe 110 extending in the longitudinal direction in the expansion chamber discharges exhaust gas into the expansion chamber from a large number of small holes (punching holes) 122 in the upstream portion and an opening at the downstream end, and both ends in the longitudinal direction of the expansion chamber from the inlet pipe 110.
- the exhaust gas discharged into the section is reduced in exhaust sound due to expansion in the expansion chamber, and then, in the central portion of the expansion chamber, there are two outlet pipes 111, 112 and two tail pipes 113. , 114 are discharged to the outside of the silencer body 101.
- the exhaust gas enters the expansion chamber from both ends in the longitudinal direction of the expansion chamber, and is discharged to the outside from the central portion of the expansion chamber. Therefore, even in an elongated expansion chamber, exhaust gas can be reduced using the entire expansion chamber. Can be planned.
- the exhaust silencer of the second embodiment discharges the condensed water to the outside through the following process.
- the opening 112o of the inlet pipe 112i of the other outlet pipe 112 has a small directivity to the bottom surface side of the silencer body 1 or is not directed at all, so that exhaust gas flows through the opening 112o.
- the substantial opening area does not decrease so much due to the rise in the water level of the condensed water, and the amount of exhaust gas flowing through the other outlet pipe 112 increases by the amount of the amount of exhaust gas flowing through one outlet pipe 111, while the other The flow rate of the exhaust gas flowing through the outlet pipe 112 increases.
- the condensed water stored in the silencer main body 101 is discharged from the central portion in the longitudinal direction of the silencer main body 101 to the outside from one end or the other end in the longitudinal direction.
- the exhaust silencer according to the present invention is implemented in the main silencer MM, but this may be implemented in another silencer.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
2本のアウトレットパイプは、消音器本体内において消音器本体の底面に沿って、当該底面の最下部からの距離が略等しく配置され、一方のアウトレットパイプの前記開口部は、他方のアウトレットパイプの前記開口部よりも消音器本体の底面側に指向していることを第1の特徴としている。
10;110・・・・・・インレットパイプ
11;111・・・・・・一方のアウトレットパイプ
11o;111o・・・・開口部
111u・・・・・・・・上流側アウトレットパイプ
12;112・・・・・・他方のアウトレットパイプ
12o;112o・・・・開口部
112u・・・・・・・・上流側アウトレットパイプ
E・・・・・・・・・エンジン
図2、3に実線で示すように、消音器本体1の底面に貯留する凝縮水の量が少なく、その水面が低レベルのときは、一方のアウトレットパイプ11の開口部11oが消音器本体1の底面側に指向しているため、凝縮水は一方のアウトレットパイプ11の開口部11oから効率よく吸上げられて、そのアウトレットパイプ11を通り消音器本体1の外部に排出される。
この状態から図2、3に2点鎖線で示すように、凝縮水の貯留量が増え、凝縮水の水面が上昇すると、一方のアウトレットパイプ11の開口部11oが消音器本体1の底面側へ指向しているため、その開口部11oの、排気ガスが流入する実質開口面積が水面上昇により大きく減少し、一方のアウトレットパイプ11を流れる排気ガスの量が減少して、これに伴い一方のアウトレットパイプ11から排出される凝縮水の量も減少する。このとき、他方のアウトレットパイプ12の開口部12oは消音器本体1の底面側への指向度合が小さく、または全く指向していないので、その開口部12oの、排気ガスが流入する実質的開口面積は凝縮水の水面上昇によってもさほど減少せず、一方のアウトレットパイプ11を流れる排気ガスの量が減少した分、他方のアウトレットパイプ12を流れる排気ガスの量が増加して、他方のアウトレットパイプ12を流れる排気ガスの流速が大きくなる。これにより、他方のアウトレットパイプ12の凝縮水を吸上げる吸引力が高まり、他方のアウトレットパイプ12に凝縮水が多量に吸い込まれて消音器本体1の外部に排出され、消音器本体1の底面に貯留する凝縮水の水面はふたたび前記した低レベルに下がる。
図8、9、11に実線で示すように、消音器本体101の底面に貯留する凝縮水の量が少なく、その水面が低レベルのときは、一方のアウトレットパイプ111の入口パイプ111iの開口部111oが消音器本体1の底面側に指向しているため、凝縮水は一方のアウトレットパイプ111の開口部111oから効率よく吸上げられて、そのアウトレットパイプ111を通り消音器本体1の外部に排出される。
この状態から図8、9、11に2点鎖線で示すように、凝縮水の貯留量が増え、凝縮水の水面が上昇すると、一方のアウトレットパイプ111の入口パイプ111iの開口部111oが消音器本体1の底面側へ指向しているため、その開口部111oの、排気ガスが流入する実質開口面積が水面上昇により大きく減少し、一方のアウトレットパイプ111を流れる排気ガスの量が減少して、これに伴い一方のアウトレットパイプ111から排出される凝縮水の量も減少する。このとき、他方のアウトレットパイプ112の入口パイプ112iの開口部112oは消音器本体1の底面側への指向度合が小さく、または全く指向していないので、その開口部112oの、排気ガスが流入する実質的開口面積は凝縮水の水面上昇によってもさほど減少せず、一方のアウトレットパイプ111を流れる排気ガスの量が減少した分、他方のアウトレットパイプ112を流れる排気ガスの量が増加して、他方のアウトレットパイプ112を流れる排気ガスの流速が大きくなる。これにより他方のアウトレットパイプ112の凝縮水を吸上げる吸引力が高まり、他方のアウトレットパイプ112に凝縮水が多量に吸い込まれて消音器本体101の外部に排出され、消音器本体101の底面に貯留する凝縮水の水面はふたたび前記した低レベルに下がる。
Claims (3)
- 消音器本体(1;101)と、
下流端に消音器本体(1;101)内に開口する開口部を有し、エンジン(E)からの排気ガスを消音器本体(1;101)に導くインレットパイプ(10;110)と、
上流端に消音器本体(1;101)内に開口する開口部(11o,12o;111o,112o)を有し、消音器本体(1;101)内の排気ガスを消音器本体(1;101)の外部に排出する2本のアウトレットパイプ(11,12;111,112)と、
を備える排気消音装置において、
2本のアウトレットパイプ(11,12;111,112)は、消音器本体(1,101)内において消音器本体(1,101)の底面に沿って、当該底面の最下部からの距離が略等しく配置され、一方のアウトレットパイプ(11;111)の前記開口部(11o;111o)は、他方のアウトレットパイプ(12;112)の前記開口部(12o;112o)よりも消音器本体(1;101)の底面側に指向していることを特徴とする、排気消音装置。 - 前記消音器本体(1)は、排気ガスの流れ方向における消音器本体(1)の上流側から消音器本体(1)の下流側に向かって上向きに傾斜されており、前記一方および他方のアウトレットパイプ(11,12)の前記開口部(11o,12o)は、消音器本体(1)内において前記上流側にあって、一方のアウトレットパイプ(11)の開口部(11o)が前記上流側から前記下流側に向かって下向きに傾斜されていることを特徴とする、前記請求項1記載の排気消音装置。
- 前記2本のアウトレットパイプ(111,112)は、S字型に形成されて、消音器本体(101)内の長手方向の両側にそれぞれ配置され、それらのアウトレットパイプ(111,112)の上流側アウトレットパイプ(111u,112u)は、消音器本体(101)の底面に沿って、当該底面の最下部からの距離が略等しく配置され、一方および他方のアウトレットパイプ(111,112)の上流端に形成される開口部(111o,112o)は、消音器本体(101)の長手方向の中央部に配置されることを特徴とする、前記請求項1記載の排気消音装置。
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CN201280042661.XA CN103764966B (zh) | 2011-09-05 | 2012-08-27 | 排气消声装置 |
JP2013532541A JP5876058B2 (ja) | 2011-09-05 | 2012-08-27 | 排気消音装置 |
US14/241,512 US9228475B2 (en) | 2011-09-05 | 2012-08-27 | Exhaust silencing device |
DE112012003679.4T DE112012003679B4 (de) | 2011-09-05 | 2012-08-27 | Abgas-Schalldämpfer-Vorrichtung |
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JP2011-193310 | 2011-09-05 | ||
JP2011193310 | 2011-09-05 |
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PCT/JP2012/071545 WO2013035566A1 (ja) | 2011-09-05 | 2012-08-27 | 排気消音装置 |
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US (1) | US9228475B2 (ja) |
JP (1) | JP5876058B2 (ja) |
CN (1) | CN103764966B (ja) |
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WO (1) | WO2013035566A1 (ja) |
Cited By (4)
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CN103410586A (zh) * | 2013-05-27 | 2013-11-27 | 安徽江淮汽车股份有限公司 | 一种多功能消声器结构 |
EP2853703A1 (en) * | 2013-09-27 | 2015-04-01 | Honda Motor Co., Ltd. | Exhaust structure for a vehicle |
GB2534635A (en) * | 2015-10-18 | 2016-08-03 | Edgar Blackburn Anthony | 'Blackburn cycle' engine with exhaust condenser |
WO2018029865A1 (ja) * | 2016-08-12 | 2018-02-15 | フタバ産業株式会社 | マフラ |
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DE102014002996A1 (de) * | 2014-02-28 | 2015-09-03 | Daimler Ag | Anordnung wenigstens zweier Abgasrohre an einem Schalldämpfer |
JP6508187B2 (ja) * | 2016-12-26 | 2019-05-08 | トヨタ自動車株式会社 | 排気管構造 |
JP6981848B2 (ja) * | 2017-11-08 | 2021-12-17 | トヨタ自動車株式会社 | 排気消音装置 |
CN108979817B (zh) * | 2018-09-07 | 2023-07-28 | 爱驰威汽车零部件(盐城)有限公司 | 一种高效率汽车净化消音器 |
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JPWO2013035566A1 (ja) | 2015-03-23 |
DE112012003679B4 (de) | 2016-10-06 |
JP5876058B2 (ja) | 2016-03-02 |
US9228475B2 (en) | 2016-01-05 |
CN103764966B (zh) | 2016-05-11 |
US20140291067A1 (en) | 2014-10-02 |
CN103764966A (zh) | 2014-04-30 |
DE112012003679T5 (de) | 2014-07-17 |
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