EP1017936A1 - Silencer with a bypass resonator - Google Patents
Silencer with a bypass resonatorInfo
- Publication number
- EP1017936A1 EP1017936A1 EP98948914A EP98948914A EP1017936A1 EP 1017936 A1 EP1017936 A1 EP 1017936A1 EP 98948914 A EP98948914 A EP 98948914A EP 98948914 A EP98948914 A EP 98948914A EP 1017936 A1 EP1017936 A1 EP 1017936A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shunt resonator
- sound
- connection
- silencer
- silencer according
- 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
Links
- 230000003584 silencer Effects 0.000 title claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
- F01N1/023—Helmholtz resonators
-
- 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
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
-
- 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
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
-
- 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
- F02M35/1222—Flow throttling or guiding by using adjustable or movable elements, e.g. valves, membranes, bellows, expanding or shrinking elements
-
- 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
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1261—Helmholtz resonators
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
Definitions
- the invention relates to a silencer with a shunt resonator according to the preamble of the main claim.
- a shunt resonator is coupled to a silencer in the intake duct of an internal combustion engine.
- Such a shunt resonator leads to an improvement in sound attenuation, in particular in the area of its natural resonance frequency, the value of this natural resonance frequency being determined by the dimensions and geometric design of the shunt resonator, also called the Helmholtz resonator in the shunt.
- the Helmholtz resonator To be able to adapt to different sound conditions often require complex mechanical devices or a separate resonator for each sound condition.
- the invention has for its object to design a muffler of the type mentioned in such a way that the damping behavior can be influenced in a simple manner.
- the muffler according to the invention is advantageously suitable, starting from the generic type, to solve the task with the characterizing features of the main claim. Because the tube-like connections between the sound-conducting channel and the shunt resonator are interchangeable parts that protrude into the shunt resonator with different lengths m, different natural resonances of the arrangement can be set in a simple manner.
- a mutually closing and opening flap there are at least two tube-like connections, each with a different diameter, which are each connected to the shunt resonator via a mutually closing and opening flap; in an additional position both can be open or both can be closed.
- This flap is easy to implement mechanically, the switching process, both for example, in the case of a rotating flap which, depending on the rotational position, closes one opening and releases the other, can be brought about by an electric motor or by a pressure cell.
- the tubular connection is connected to such a shunt resonator, the volume of which can be coupled to the tubular connection can be enlarged or reduced by means of a switching flap.
- the tube-like connection can be coupled to the cylindrical surface of a hollow cylindrical shunt resonator, the volume inside the shunt resonator on the one hand through a fixed wall from the central axis to the outer wall and on the other hand through a wall that can be moved around the central axis, can be locked in different switching positions or is continuously adjustable can be narrowed down.
- the above-described rotary flap or the wall can be adjusted by means of an electric motor or a pressure cell.
- a push rod which is controlled by the pressure cell and can be locked in predetermined positions can be provided in a simple manner.
- the locking of the push rod can be realized at the locking or switching positions, for example by means of a ball, which locks into recesses of the push rod under the pressure of a spring.
- a pressure cell control for example via a solenoid valve, would only engage in the front and rear positions when the negative pressure is present or is not present.
- the sound-conducting duct is the intake duct for the intake air of an internal combustion engine, and the sound emissions to be damped are caused by the intake pulses of the individual cylinders.
- a switch position for the adjustment of the resonator can be in a state in which the intake manifold vacuum is greatest in the low speed range of the internal combustion engine and thus the vacuum box spring is compressed.
- a second switching position can be set in the middle speed range when the intake manifold vacuum is weaker and a third switching position can be set in the high speed range when the intake manifold vacuum is very weak and the spring pressure of the pressure cell is strong in the direction of the push rod.
- FIG. 1 shows a first embodiment with different inserts as a tube-like connection between the sound-conducting channel and the shunt resonator
- Figure 2 shows a second embodiment with two mutually disclosed and closable tubular connections between the sound-conducting channel and the shunt resonator;
- Figure 3 is a detailed view in section I-I of Figure 2 on a rotary flap for closing and opening the respective tubular connection of Figure 2;
- Figure 4 shows a third embodiment with an adjustable flap in the shunt resonator
- Figure 5 is a schematic view of a pressure control of the shunt volume with a push rod
- FIG. 6 shows a diagram of the pressure profile of the pressure cell and the path profile of the push rod according to FIG. 5.
- an intake duct 1 is shown as a sound-conducting duct. provided, which ensures the supply of intake air of an internal combustion engine not explained here.
- An opening 2 is provided on the intake duct 1, to which a tubular connection 3a to a housing volume V is coupled, which acts as a shunt resonator 4 for the sound vibrations of the pulsating intake air in the intake duct 1.
- the tubular connection 3a with the length La can be replaced here by another tubular connection 3b with the length Lb.
- the damping behavior of the arrangement shown in FIG. 1 is determined in particular by the volume V, by the length La, Lb of the tubular connection 3a, 3b and by the respective average area A of the tubular connection 3a, 3b. These three aforementioned variables determine the natural resonance frequency of the shunt resonator.
- the length L (La, Lb) represents the variable variable for adapting the value of the natural resonance frequency to the desired sound damping behavior.
- two openings 5 and 6 are provided for two tubular connections 7 and 8 with the respective average areas AI and A2.
- a rotary flap 10 is attached, with which the openings 5 and 6 are mutually closed and obvious, or both can be opened or closed. From Figure 3 is the rotary valve
- the wings of the rotary flap 10 can mutually close the openings 5 and 6. close, so that the average areas AI and A2 represent the variable size for setting the natural resonance frequency.
- the rotation of the rotary flap 10 can be implemented, for example, by an electric motor or also by a pressure cell.
- the vacuum from the intake manifold or a vacuum accumulator can be used in combination with a solenoid valve.
- a third exemplary embodiment according to FIG. 4 has a shunt resonator 12, which consists of a hollow cylinder with a variable volume VI, V2, Vn.
- the connection to the intake duct 1 is designed here by a tubular connection 13 with a constant average area A and a constant length L.
- a wall 14 is fixed here in the hollow cylinder on one side of the connection of the tubular connection 13; an adjustable wall 15 is rotatably arranged about a central axis 16.
- a volume VI can be realized with the walls 14 and 15 according to FIG. 4 and a volume V2 in a second switching position, indicated here by dashed lines.
- Further volumes Vn can be made possible in any rotational position of the wall 15 by snapping in or by continuously adjusting the wall 15.
- the wall 15 can be adjusted by an electric motor or by a pressure cell.
- a pressure can 20 can be seen in FIG. 5, which can be used to control the rotary flap 10 or the wall 15. With the pressure can not recognizable here In the interior of the pressure cell 20, a push rod 21 is controlled, which can snap into switching positions P1, P2 and P3 and thus implement the adjustment options described above with a snap-in of the rotary flap 10 or the wall 15.
- the latching can take place here with a stationary ball 22, which snaps into the switching positions P1, P2 or P3 via a spring 23.
- FIG. 6 shows the falling pressure curve 24 in the vacuum box 20 on the one hand and the stepwise path 25 of the push rod 21 with the latches at the switching positions Pl, P2 and P3 in relation to the path s and the pressure curve P on the other hand u makes it clear.
- Pl corresponds to the state when the intake manifold vacuum P u is greatest in the low speed range of the internal combustion engine and the vacuum can spring is thus compressed.
- P2 corresponds to the second switching position with a weak intake manifold vacuum P u in the medium speed range and P3 to the third switching position with a very weak intake manifold vacuum P u in the high speed range and strong spring force of the pressure cell 20 in the direction of the push rod 21.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19743482 | 1997-10-01 | ||
DE19743482A DE19743482A1 (en) | 1997-10-01 | 1997-10-01 | Silencer with a shunt resonator |
PCT/EP1998/005636 WO1999017012A1 (en) | 1997-10-01 | 1998-09-05 | Silencer with a bypass resonator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1017936A1 true EP1017936A1 (en) | 2000-07-12 |
EP1017936B1 EP1017936B1 (en) | 2004-02-25 |
Family
ID=7844343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98948914A Expired - Lifetime EP1017936B1 (en) | 1997-10-01 | 1998-09-05 | Silencer with a bypass resonator |
Country Status (6)
Country | Link |
---|---|
US (1) | US6494290B1 (en) |
EP (1) | EP1017936B1 (en) |
JP (1) | JP2001518593A (en) |
DE (2) | DE19743482A1 (en) |
WO (1) | WO1999017012A1 (en) |
ZA (1) | ZA988634B (en) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10004991A1 (en) * | 2000-02-04 | 2001-08-09 | Volkswagen Ag | Helmholtz resonator with variable resonance frequency for damping IC engine air intake or exhaust gas noise uses controlled stops for altering neck opening cross-sections |
DE10027426B4 (en) | 2000-06-02 | 2006-12-14 | Dr.Ing.H.C. F. Porsche Ag | Air supply device for an internal combustion engine |
US7055484B2 (en) * | 2002-01-18 | 2006-06-06 | Carrier Corporation | Multiple frequency Helmholtz resonator |
DE10217760B4 (en) * | 2002-04-20 | 2010-08-12 | Mahle Filtersysteme Gmbh | Fresh gas supply system for an internal combustion engine |
US6609489B1 (en) * | 2002-05-07 | 2003-08-26 | General Motors Corporation | Apparatus and method for reducing engine noise |
DE10322168B4 (en) * | 2002-05-16 | 2008-12-18 | Toyoda Gosei Co., Ltd. | Air intake device |
DE10231238B4 (en) * | 2002-07-11 | 2004-06-03 | J. Eberspächer GmbH & Co. KG | Noise damping device |
DE10247550A1 (en) * | 2002-10-11 | 2004-04-22 | Werner, Jürgen | Radial fan for leaf and waste vacuum, leaf blower or Laubladegeräte |
JP4251027B2 (en) * | 2003-07-14 | 2009-04-08 | トヨタ紡織株式会社 | Silencer |
KR100569901B1 (en) * | 2003-10-07 | 2006-04-10 | 현대자동차주식회사 | Noise control type intake hose structure |
US20050194207A1 (en) * | 2004-03-04 | 2005-09-08 | York International Corporation | Apparatus and method of sound attenuation in a system employing a VSD and a quarter-wave resonator |
US7337877B2 (en) * | 2004-03-12 | 2008-03-04 | Visteon Global Technologies, Inc. | Variable geometry resonator for acoustic control |
US20050205354A1 (en) * | 2004-03-19 | 2005-09-22 | Visteon Global Technologies, Inc. | Dual chamber variable geometry resonator |
US7117974B2 (en) * | 2004-05-14 | 2006-10-10 | Visteon Global Technologies, Inc. | Electronically controlled dual chamber variable resonator |
WO2005111993A1 (en) * | 2004-05-14 | 2005-11-24 | Yanmar Co., Ltd. | Noise suppressing structure of cabin |
DE102004043335A1 (en) * | 2004-09-08 | 2006-03-09 | Daimlerchrysler Ag | Noise configuration device for use in motor vehicle, has air duct provided in area within which highest acoustic pressure is present in proximity to resonant frequency of air duct which is locked with noise absorbing material |
US20060086564A1 (en) * | 2004-10-21 | 2006-04-27 | Visteon Global Technologies, Inc. | Dual chamber variable geometry resonator |
DE202005011448U1 (en) * | 2005-07-18 | 2006-11-23 | Kess, Roland | Silencer outlet part for a motorcycle silencer |
DE102006039467A1 (en) * | 2005-08-26 | 2007-03-15 | Toyoda Gosei Co., Ltd., Nishikasugai | Control structure for the air intake noise |
US7353791B2 (en) * | 2005-10-07 | 2008-04-08 | Nissan Motor Co., Ltd. | Sound increase apparatus |
US7690478B2 (en) * | 2006-09-15 | 2010-04-06 | Visteon Global Technologies, Inc. | Continuously variable tuned resonator |
SE531516C2 (en) * | 2007-09-25 | 2009-05-05 | Scania Cv Ab | Noise-canceling arrangement |
CN102536551A (en) * | 2012-01-20 | 2012-07-04 | 重庆长安汽车股份有限公司 | Experimental volume-adjustable resonant cavity of air filter |
CN102720577B (en) * | 2012-06-26 | 2015-04-29 | 徐州重型机械有限公司 | Exhaust system for crane |
US10302052B2 (en) | 2016-11-16 | 2019-05-28 | Ford Global Technologies, Llc | Vacuum actuated multi-frequency quarter-wave resonator for an internal combustion engine |
DE102019008357B3 (en) * | 2019-12-02 | 2021-05-06 | Ford Global Technologies, Llc | Internal combustion engine with exhaust gas turbocharging and exhaust gas aftertreatment close to the engine |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT216292B (en) * | 1958-10-03 | 1961-07-25 | Auto Union Gmbh | Intake silencer for internal combustion engines |
US4539947A (en) * | 1982-12-09 | 1985-09-10 | Nippondenso Co., Ltd. | Resonator for internal combustion engines |
US4546733A (en) * | 1983-03-22 | 1985-10-15 | Nippondenso Co., Ltd. | Resonator for internal combustion engines |
JPS60182348A (en) * | 1984-02-29 | 1985-09-17 | Hino Motors Ltd | Suction noise reducer for engine |
JPS61129414A (en) * | 1984-11-27 | 1986-06-17 | Agency Of Ind Science & Technol | Silencer device of adaptable type |
JP2562054B2 (en) * | 1989-05-29 | 1996-12-11 | 本田技研工業株式会社 | Air intake noise reduction device for internal combustion engine |
US5283398A (en) * | 1989-12-26 | 1994-02-01 | Tsuchiya Mfg. Co., Ltd. | Resonator type silencer |
GB2253076B (en) * | 1991-02-21 | 1994-08-03 | Lotus Car | Method and apparatus for attenuating acoustic vibrations in a medium |
US5317112A (en) * | 1991-10-16 | 1994-05-31 | Hyundai Motor Company | Intake silencer of the variable type for use in motor vehicle |
US5511589A (en) * | 1992-02-05 | 1996-04-30 | Daniels Manufacturing Corporation | Power operated safety cable tool |
JPH05257482A (en) * | 1992-03-16 | 1993-10-08 | Hitachi Ltd | Silencer for intake duct |
DE4305333C1 (en) * | 1993-02-20 | 1994-07-07 | Fasag Ag Suhr | Noise damping device for reducing muzzle noise in systems with pulsating gas flows |
FR2710953B1 (en) * | 1993-10-05 | 1995-12-08 | Renault Vehicules Ind | Method and device for controlling a fluid passing through a junction box and system equipped with such a device for regulating the charge air of an internal combustion engine. |
DE4336112A1 (en) * | 1993-10-22 | 1995-04-27 | Knecht Filterwerke Gmbh | Shunt resonator |
US5389845A (en) * | 1993-11-22 | 1995-02-14 | Technical Research Associates, Inc. | Linear actuator apparatus and method |
US5680854A (en) * | 1995-01-09 | 1997-10-28 | Diamant Boart, Inc. | Self propelled saw |
US5771851A (en) * | 1997-07-29 | 1998-06-30 | Siemens Electric Limited | Variably tuned Helmholtz resonator with linear response controller |
-
1997
- 1997-10-01 DE DE19743482A patent/DE19743482A1/en not_active Withdrawn
-
1998
- 1998-09-05 DE DE59810857T patent/DE59810857D1/en not_active Expired - Lifetime
- 1998-09-05 WO PCT/EP1998/005636 patent/WO1999017012A1/en active IP Right Grant
- 1998-09-05 US US09/509,876 patent/US6494290B1/en not_active Expired - Fee Related
- 1998-09-05 EP EP98948914A patent/EP1017936B1/en not_active Expired - Lifetime
- 1998-09-05 JP JP2000514055A patent/JP2001518593A/en active Pending
- 1998-09-21 ZA ZA988634A patent/ZA988634B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9917012A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2001518593A (en) | 2001-10-16 |
DE59810857D1 (en) | 2004-04-01 |
WO1999017012A1 (en) | 1999-04-08 |
EP1017936B1 (en) | 2004-02-25 |
US6494290B1 (en) | 2002-12-17 |
ZA988634B (en) | 1999-03-26 |
DE19743482A1 (en) | 1999-04-08 |
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