WO1987000241A1 - Silencer - Google Patents
Silencer Download PDFInfo
- Publication number
- WO1987000241A1 WO1987000241A1 PCT/NO1986/000044 NO8600044W WO8700241A1 WO 1987000241 A1 WO1987000241 A1 WO 1987000241A1 NO 8600044 W NO8600044 W NO 8600044W WO 8700241 A1 WO8700241 A1 WO 8700241A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- focusing point
- absorbing material
- silencer according
- sound
- sound absorbing
- Prior art date
Links
Classifications
-
- 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
- F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
-
- 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
- F01N2490/16—Chambers with particular shapes, e.g. spherical
Definitions
- the present invention is concerned with a silencer, especially for muffling sound waves form combustion engines.
- Silencers of the type described are known from DE 338 906 and NO 56 196.
- the silencer according to the first mention patent comprises a house having two against eachother facing and to eachother connected parabolic hollow members where the exhaust gases are brought in near one or both focusing points. From the focusing point the sound waves will be reflected on the internal wall and deflected to parallel beams which at the opposite internal wall are deflected and directed * against the second parabolic focusing point.
- a dampening of the noice is aimed at by ' mixing and swirling of the sound ' • beams , whereby an extension of the cross section area is present- from the focusing points towards the middle of the device.
- the known silencer has a comparatively complicated construc ⁇ tion and an interference between different sound waves must be established to achieve effectivety.
- effective dampening of the sound is achieved with a simple design according to the features stated in the characterizing clause of the claims.
- Fig. 1 discloses a section I-I in Fig. 2
- Fig. 2 discloses a section II-II in Fig. 1
- Fig. 3 discloses a section corresponding to Fig. 2 of a second embodiment having another arrangement of the input
- Fig. 4 discloses a section corresponding to Fig. 2 of a further embodiment of the invention
- Fig. 5-7 are righthand use of the silencer on Fig. 2, disclosing different side wall designes
- Fig. 8-11 are sections corresponding to Fig. 2 disclosing differ ⁇ ent designs of the top and bottom of the silencer according to the invention
- Fig. 12 discloses a section according to Fig. 1 of a further embodiment of the silencer according to the invention.
- the silencer according to the present invention comprises, as principally disclosed in Fig. 1, an input 1 for gases transmitting sound waves, an output 2 for the exhaust, a closed container comprising a top 7, a bottom 8 and a surrounding side wall 3, and a sound absorbing material 6.
- the side wall 3 has the shape of an ellipses, where- by the input 1 terminates approximately at the first focus ⁇ ing point 4 and sound absorbing material is arranged on and around the second focusing point 5.
- the combustion gases from a not shown combustion engine are brought into the container through the input 1 in such- a way that the sound waves are dispersed substant ⁇ ially from the first focusing point 4 in all directions, thereby being reflected from the side wall 3 and directed against the second focusing point 5 where the sound waves substantially, are absorbed.
- Part of the .sound waves is directed also straight forward from the input 1 and thereby being absorbed by the sound absorbing material 6 directly.
- the input 1 may be arranged as disclosed in Fig. 2 or as disclosed in Fig. 3, in both cases however, the sound waves will enter the container substantially in the first focusing point 4.
- Fig. 4 discloses an embodiment of the present inven ⁇ tion where the amount of sound absorbing material is in ⁇ creased by a box 9 arranged on the top 7 of the container, an aperture 10 thereby being provided substantially in the second focusing point 5, whereby the box 9 is completely filled with sound absorbing material.
- Figures 5, 6 and 7 disclose different side wall shapes, whereby the side wall 3 according to Fig. 5 is straight between the top 7 and the bottom 8 except for a rounding connection between the wall and the top and the bottom respectively.
- Fig. 6 discloses a side wall shape being part of a sircle, e.g. the embodiment according to Fig. 6 thereby being a disc cut out of an ellipsoid.
- the embodiment according to Fig. 7 comprises a side wall configuration where the side wall is tapered from the middle section of the silencer up to the top 7, and from the middle section down to the bottom 8.
- the mutual constellation can be according to Figures 8-11.
- Fig. 8 the distance between the top 7 and the bottom 8 increases from the input side against the output side, in Fig. 9 the distance decreases in the same direction.
- Fig. 10 discloses an embodiment where the distance between the top and the bottom 8 decreases both from the input side and the output side against the middle of the silencer and in Fig. 11 the distance between the top 7 and the bottom 8 increases from both the input side and the output side against the middle of the silencer.
- Fig. 12 discloses an embodiment having a substantial part of the container filled with sound absorbing material 6.
- the amount and arrangement of the sound absorbing mater ⁇ ial 6 is a matter of modifications, however is important that at least the area at and near the second focusing point 5 is filled out with sound absorbing material 6.
- the input 1 principally is a pipe extending through the side wall 3 and as far as to the first focusing point 4.
- the input pipe can be drawn back as far as to the sidewall 3 without extending into the interior of the container. Principally this is diclosed in Fig. 3 where the input is terminated at the container wall, in this case the bottom 8.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86904417T ATE40582T1 (en) | 1985-06-27 | 1986-06-26 | SILENCER. |
DE8686904417T DE3662010D1 (en) | 1985-06-27 | 1986-06-26 | Silencer |
NO870802A NO164935C (en) | 1985-06-27 | 1987-02-26 | MUFFLER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO852587 | 1985-06-27 | ||
NO852587A NO156384C (en) | 1985-06-27 | 1985-06-27 | MUFFLER. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1987000241A1 true WO1987000241A1 (en) | 1987-01-15 |
Family
ID=19888363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO1986/000044 WO1987000241A1 (en) | 1985-06-27 | 1986-06-26 | Silencer |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0229148B1 (en) |
AT (1) | ATE40582T1 (en) |
AU (1) | AU6120886A (en) |
DE (1) | DE3662010D1 (en) |
NO (2) | NO156384C (en) |
WO (1) | WO1987000241A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0271465A2 (en) * | 1986-12-12 | 1988-06-15 | REINHARDTSEN, Tore | Silencer |
EP3730790A4 (en) * | 2017-12-18 | 2021-06-16 | Nitto Kohki Co., Ltd. | Fluid device and buffer tank for same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO56196C (en) * | 1933-11-21 | |||
DE338906C (en) * | 1917-03-04 | 1921-06-15 | Gottfried Begas Dipl Ing | Exhaust silencer |
EP0100139A1 (en) * | 1982-07-19 | 1984-02-08 | Tecumseh Products Company | Exhaust gas muffler |
-
1985
- 1985-06-27 NO NO852587A patent/NO156384C/en unknown
-
1986
- 1986-06-26 AU AU61208/86A patent/AU6120886A/en not_active Abandoned
- 1986-06-26 DE DE8686904417T patent/DE3662010D1/en not_active Expired
- 1986-06-26 AT AT86904417T patent/ATE40582T1/en active
- 1986-06-26 WO PCT/NO1986/000044 patent/WO1987000241A1/en active IP Right Grant
- 1986-06-26 EP EP86904417A patent/EP0229148B1/en not_active Expired
-
1987
- 1987-02-26 NO NO870802A patent/NO164935C/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE338906C (en) * | 1917-03-04 | 1921-06-15 | Gottfried Begas Dipl Ing | Exhaust silencer |
NO56196C (en) * | 1933-11-21 | |||
EP0100139A1 (en) * | 1982-07-19 | 1984-02-08 | Tecumseh Products Company | Exhaust gas muffler |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0271465A2 (en) * | 1986-12-12 | 1988-06-15 | REINHARDTSEN, Tore | Silencer |
EP0271465A3 (en) * | 1986-12-12 | 1990-02-14 | REINHARDTSEN, Tore | Silencer |
EP3730790A4 (en) * | 2017-12-18 | 2021-06-16 | Nitto Kohki Co., Ltd. | Fluid device and buffer tank for same |
Also Published As
Publication number | Publication date |
---|---|
EP0229148B1 (en) | 1989-02-01 |
ATE40582T1 (en) | 1989-02-15 |
NO156384B (en) | 1987-06-01 |
NO870802D0 (en) | 1987-02-26 |
EP0229148A1 (en) | 1987-07-22 |
AU6120886A (en) | 1987-01-30 |
NO164935B (en) | 1990-08-20 |
NO870802L (en) | 1987-02-26 |
DE3662010D1 (en) | 1989-03-09 |
NO156384C (en) | 1987-09-09 |
NO852587L (en) | 1986-12-29 |
NO164935C (en) | 1990-11-28 |
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