CN205370688U - Exhaust silencer of internal combustion engine - Google Patents
Exhaust silencer of internal combustion engine Download PDFInfo
- Publication number
- CN205370688U CN205370688U CN201620134726.9U CN201620134726U CN205370688U CN 205370688 U CN205370688 U CN 205370688U CN 201620134726 U CN201620134726 U CN 201620134726U CN 205370688 U CN205370688 U CN 205370688U
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- air chamber
- airway
- air
- dividing plate
- internal combustion
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Abstract
The utility model provides an exhaust silencer of internal combustion engine, first, second, third baffle are second air chamber, first air chamber, fourth air chamber and third air chamber on a left side to parting on the right side to separate with the muffler, the intake pipe is passed and is let in first air chamber after seal shell gets into the second air chamber, is provided with exhaust hole or second air duct on the first baffle for communicate first air chamber and second air chamber, second air chamber and third air chamber pass through third air duct intercommunication, be provided with exhaust hole or fourth air duct on the third baffle for intercommunication third air chamber and fourth air chamber, the outlet duct passes third air chamber intercommunication fourth air chamber. This patent changes through the direction of exhausting the combustion gas many times, has reduced resonance phenomenon, gaseous pressure drop reduces through first air chamber, second air chamber, third air chamber, fourth air chamber in proper order for gas pressure has avoided violent change, makes the exhaust phase to evenly, has avoided the return -air phenomenon basically, the muffler volume is littleer, reduces more than the volume third than current muffler.
Description
Technical field
This utility model relates to a kind of deafener technology, particularly a kind of exhaust muffler for internal combustion engine.
Background technology
The effect of exhaustor is exactly that waste gas is discharged from combustion chamber of engine, the aerofluxus of engine is due to the operation principle of electromotor, the blast of aerofluxus is that ripple one rolling land is discharged, if the diameter of exhaustor is less, so discharging each ripple of blast all can at the bigger pressure of exhaustor inner form, when this ripple blast starts outwards to discharge in exhaustor, a rear ripple blast will be formed a negative pressure, namely everybody described back pressure.The size of back pressure determines the best aerofluxus field of engine, if back pressure is more big, engine at slow-revving blast due to the impact by previous ripple blast, will the more fast negative pressure sucking-off by previous ripple blast, that is exhaust effect is more good, but when engine arrives high revolution, owing to the diameter of exhaustor is less, what cause is exactly that the pressure in exhaustor not only can not next ripple blast of sucking-off as early as possible, on the contrary the discharge of each wave is caused suitable resistance, and interact between each ripple blast, cause aerofluxus not smoothly, thus reducing the performance of engine, this time, select the exhaustor being relatively large in diameter will play good effect.Advantage: noise is little, low speed torsion is good；Shortcoming: during high speed, waste gas cannot quickly discharge, draw and ring engine power output.
What back pressure referred to is exactly, time gas advances, and the pressure simultaneously backside gas caused.The aerofluxus of engine is done, is not what accomplish without any letup, is the gas significantly high by intensive density again and again, allows and forms negative pressure state between front air mass and the air mass at rear.If the distance of front and back air mass is suitable, the negative pressure in the middle of that will attract air mass next time at once, defines the strength toward Anterior crossbite, and this linking is the most smooth and easy, allows the most ultimate attainment benefit that the force production of engine plays must lean on suitable back pressure.
On the contrary, if back pressure is not enough, the distance causing front and back air mass is too close.That reforms into front gas can hinder the advance of backside gas, so can in aerofluxus relative property because gas hinders mutually, back pressure is excessive, causes the engine above obstruction of output.
Full back pressure exhaustor: mainly the volume change of the panel deafener in tube or pipe produces a kind of pressure that can return cylinder, when, after engine ignition, piston starts footpath action edge stroke, and exhaust valve can arrive at piston and BBC will open.At this moment, the back pressure in pipe can be blocked waste gas and go out, and gaseous mixture can be reached to burn completely.But back pressure is excessively strong, waste gas can be caused cannot to be completely exhausted out cylinder, cause waste gas to reduce efficiency of combustion with gaseous mixture one combust.Certainly horsepower output is affected the most exactly.Advantage: noise is little, low speed torsion is good；Shortcoming: during high speed, waste gas cannot quickly be discharged, affects engine power output；Volume: low.
Half back pressure exhaustor: the strength of this pipe back pressure is relatively low, and the compliance of aerofluxus is run well than back pressure.Briefly, being between back pressure pipe and straight pipe, have the back pressure of appropriateness to obtain starting torsion, aerofluxus compliance is than back pressure Guan Jia, and middle high rotating speed torsion is also big than back pressure pipe.Advantage: in rising, tail speed torsion is done well；Shortcoming: noise is bigger than normal, volume is bigger.
ZL201310485575.2 relates to the deafener of a kind of compact internal combustion engine, it includes upper cover, dividing plate and lower cover, it is the first chamber between upper cover and dividing plate, is the second chamber between dividing plate and lower cover, cover on described and be provided with air inlet, cover under described and be provided with gas outlet, described first chamber includes expansion chambers, and it is arranged on dividing plate, and expansion chambers is prominent to the second chamber by dividing plate, the volume ratio of described first chamber and the second chamber is K, 1.5≤K≤2.0.Compared with the deafener of same discharge capacity or the compact internal combustion engine of close discharge capacity, the present invention is by improving gas flow path in deafener and changing the volumetric ratio of chamber so that deafener has better erasure effect, reduces the temperature of deafener gas outlet simultaneously.
ZL00802848.6 discloses a kind of energy effective attenuation aerofluxus sound and prevents power output from reducing, make waste gas flowing without hindrance and produce the muffler for internal combustion engine of eddy current, this muffler for internal combustion engine has a housing, eddy diffusivity device, an eddy current to produce cylinder and a vortex generating member, eddy diffusivity device is arranged on housing, and it is connected on exhaust inlet pipe, eddy current produces cylinder and is positioned on housing and reaches outside from opposite side, and in its outer end equipped with tail pipe, vortex generating member is axially mounted to eddy current and produces on cylinder.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of exhaust muffler for internal combustion engine, such that it is able to reach the effect of noise reduction, vibration damping.
In order to realize solving the purpose of above-mentioned technical problem, this utility model adopts the technical scheme that
A kind of exhaust muffler for internal combustion engine, the escape pipe that directly or indirectly communicates with air including the air inlet pipe being directly or indirectly connected with engine exhaust port, seal casinghousing, it is characterized in that: be disposed with the first dividing plate, second partition, the 3rd dividing plate inside exhaust muffler for internal combustion engine from air inlet pipe direction, deafener is divided into from left to right the second air chamber, the first air chamber, the 4th air chamber and the 3rd air chamber；
Air inlet pipe passes into the first air chamber after entering the second air chamber through seal casinghousing, and air inlet pipe is the first airway in the part of the first air chamber, and the first airway is by being provided with multiple steam vent and the connection of the first air chamber on the mouth of pipe and/or tube wall；First dividing plate is provided with steam vent or the second airway, in order to connect the first air chamber and the second air chamber；
Second air chamber and the 3rd air chamber are by the 3rd airway connection；
3rd dividing plate is provided with steam vent or the 4th airway, in order to connect the 3rd air chamber and the 4th air chamber；
Escape pipe is through the 3rd air chamber connection the 4th air chamber, and escape pipe is the 5th airway in the part of the 4th air chamber, and the 5th airway is by the mouth of pipe and the connection of the 4th air chamber, and/or the 5th airway is by being provided with multiple steam vent and the connection of the 4th air chamber on tube wall.
Concrete, the right-hand member that right-hand member is enclosed construction or the first airway of described first airway is fixing with second partition is connected and is formed enclosed construction or base closed structure, by being provided with multiple steam vent and the connection of the first air chamber on tube wall.
Concrete, described first dividing plate arranges installing hole, the second airway connects the first air chamber and the second air chamber after installing hole.More specifically, the second airway is positioned at the first air chamber or/and the second airway is positioned on the tube wall of the second air chamber is provided with multiple steam vent.
Concrete, described 3rd airway sequentially passes through and is respectively arranged at the first dividing plate, second partition, the 3rd dividing plate installing hole connect the second air chamber and the 3rd air chamber, the 3rd airway and the first air chamber and the 4th air chamber opposing seal.
Concrete, described 3rd dividing plate arranges installing hole, the 4th airway is connection the 3rd air chamber and the 4th air chamber after installing hole.More specifically, the 4th airway is positioned on the tube wall of the 3rd air chamber or/and the 4th airway is positioned on the tube wall of the 4th air chamber is provided with multiple steam vent.
Concrete, the left end of the 5th described airway is enclosed construction, by being provided with multiple steam vent and the connection of the 4th air chamber on tube wall；Or the left end of the 5th airway is fixing with second partition is connected and is formed enclosed construction or base closed structure, by tube wall is provided with multiple steam vent and the connection of the 4th air chamber.
Concrete, between the first described air chamber and the 4th air chamber, and between airway and dividing plate, and between seal casinghousing and dividing plate, it is base closed structure.
Concrete, the 3rd described airway is after the first air chamber and the 4th air chamber, and two ends are opened on the 3rd air chamber and the second air chamber respectively.
The right-hand member of each airway described in this patent, each means airway one end away from engine exhaust port direction.The left end of each airway, each means airway one end near engine exhaust port direction.
Base closed structure described in this patent, refers between airway and dividing plate, and has the gap or passage that can allow to pass through between seal casinghousing and dividing plate, but major part gas passes through from other passages.Such as, airway and dividing plate allow for space, but overwhelming majority gas passes through in airway or steam vent.The purpose of this base closed structure is in that to avoid the excessive demand to processing.The gas that this gap or passage pass through is usually no more than the 10% of total amount.
During use, owing to the gas from internal combustion engine is by the multiple steam vents on the first airway tube wall, subsequently into the first air chamber, these steam vents serve the effect of noise reduction；When gas is entered the second air chamber by the first air chamber, the flow direction of gas there occurs the change of 180 degree, add the second airway to be positioned on the tube wall of the first air chamber and be provided with multiple steam vent, the gas of the first air chamber enters the second airway by steam vent, subsequently into the second air chamber, serve the effect of vibration silencer；Entering the second air chamber, if the second airway is positioned on the tube wall of the second air chamber is provided with multiple steam vent, further function as the effect of vibration silencer.
When gas is by the second air chamber three air chamber, again it is converted the flow direction.
When the 3rd air chamber enters four air chambers, gas is to be entered the 4th airway or the 4th air chamber by multiple steam vents, and not only gas flow direction change, has also functioned to vibration silencer effect.
When gas is discharged from the 4th air chamber, not only gas flow direction change, owing to gas is by being arranged on the steam vent exhaust silencer on the 5th airway tube wall, then also function to sound deadening.
When gas flow changes, it is possible to effectively change aerofluxus volume, and, play cushioning effect effectively.
By adopting technique scheme, this utility model has following beneficial effect:
1, this patent product is by repeatedly changing expellant gas discharge directions, decreases covibration；When gas flow changes, it is possible to effectively change aerofluxus volume, and, play cushioning effect effectively.
2, the return-air noise reduction method of many air chambers is employed, gas has been carried out effective buffering, the pressure of gas is generally and is gradually changed by the first air chamber, the second air chamber, the 3rd air chamber, the 4th air chamber, gas pressure is made to avoid acute variation, make aerofluxus relatively uniform, substantially avoided return-air phenomenon；Owing to aerofluxus is relatively uniform, it also avoid the combustion mixture of unburned burning-out rekindle in acoustic filter cause in fried.
3, the multiple pores arranged on pipe in aerofluxus, serve sound deadening, reduce noise；Lower noise reduces by more than 50% than existing vibration damping deafener.
4, avoid using the sound-absorbing material such as asbestos, glass silk floss.
5, this patent product has return-air noise reduction, the feature that air-flow returns.
6, when various rotating speed, it is respectively provided with good erasure effect.
7, when the capacity that internal combustion engine is same, deafener volume can be less, generally can reduce volume more than 1/3rd than existing deafener.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is internal structure schematic diagram of the present utility model.
Fig. 3 is another internal structure schematic diagram of the present utility model.
Fig. 4 is another internal structure schematic diagram of the present utility model.
Internal structure schematic diagram when Fig. 5 is the second airway of the present utility model and the 4th airway replaces with steam vent.
Fig. 6 is structure and the gas guiding schematic diagram of the present invention.
In figure: 1-the first dividing plate, 2-second partition, 3-the 3rd dividing plate, 4-the second air chamber, 5-the first air chamber, 6-the 4th air chamber, 7-the 3rd air chamber, 8-air inlet pipe, 9-escape pipe, 10-the first airway, 11-the second airway, 12-the 3rd airway, 13-the 4th airway, 14-the 5th airway.
Arrow in figure is gas flow direction.
Detailed description of the invention
Below in conjunction with accompanying drawing, this patent is explained further explanation.But the protection domain of this patent is not limited to specific embodiment.
Embodiment 1
Exhaust muffler for internal combustion engine, the escape pipe 9 that directly or indirectly communicates with air including the air inlet pipe 8 being directly or indirectly connected with engine exhaust port, seal casinghousing, it is disposed with the first dividing plate 1, second partition the 2, the 3rd dividing plate 3 inside exhaust muffler for internal combustion engine from air inlet pipe 8 direction, deafener is divided into from left to right the second air chamber the 4, first air chamber the 5, the 4th air chamber 6 and the 3rd air chamber 7；
Air inlet pipe 8 passes into the first air chamber 5 after entering the second air chamber 4 through seal casinghousing, air inlet pipe 8 is the first airway 10 in the part of the first air chamber 5, first airway 10 is by being provided with multiple steam vent on tube wall with the first air chamber 5 connects, and the right-hand member of the first airway 10 is fixed with second partition 2 and is connected；First dividing plate 1 is provided with steam vent, in order to connect the first air chamber 5 and the second air chamber 4.
Second air chamber 4 is connected by the 3rd airway 12 with the 3rd air chamber 7；3rd airway 12 sequentially passes through and is respectively arranged at the first dividing plate 1, second partition the 2, the 3rd dividing plate 3 installing hole connects the second air chamber 4 and the 3rd air chamber 7, the 3rd airway 12 and the first air chamber 5 and the 4th air chamber 6 opposing seal.
3rd dividing plate 3 is provided with steam vent, in order to connect the 3rd air chamber 7 and the 4th air chamber 6.
Escape pipe 9 connects the 4th air chamber 6 through the 3rd air chamber 7, and escape pipe 9 is the 5th airway 14 in the part of the 4th air chamber 6, and the 5th airway 14 is connected by the mouth of pipe and the 4th air chamber 6.
Embodiment 2
Exhaust muffler for internal combustion engine, the escape pipe 9 that directly or indirectly communicates with air including the air inlet pipe 8 being directly or indirectly connected with engine exhaust port, seal casinghousing, it is disposed with the first dividing plate 1, second partition the 2, the 3rd dividing plate 3 inside exhaust muffler for internal combustion engine from air inlet pipe 8 direction, deafener is divided into from left to right the second air chamber the 4, first air chamber the 5, the 4th air chamber 6 and the 3rd air chamber 7.
Air inlet pipe 8 passes into the first air chamber 5 after entering the second air chamber 4 through seal casinghousing, and air inlet pipe 8 is the first airway 10 in the part of the first air chamber 5, and the first airway 10 is connected by the mouth of pipe and the first air chamber 5；Arranging installing hole on first dividing plate 1, the second airway 11 connects the first air chamber 5 and the second air chamber 4 after installing hole, and the second airway 11 is positioned on the tube wall of the first air chamber 5 and is provided with multiple steam vent.
Second air chamber 4 is connected by the 3rd airway 12 with the 3rd air chamber 7；Three airways sequentially pass through and are respectively arranged at the first dividing plate 1, second partition the 2, the 3rd dividing plate 3 installing hole connects the second air chamber 4 and the 3rd air chamber 7, the 3rd airway 12 and the first air chamber 5 and the 4th air chamber 6 opposing seal.
Arranging installing hole on 3rd dividing plate 3, the 4th airway 13 is connection the 3rd air chamber 7 and the 4th air chamber 6 after installing hole, and the 4th airway 13 is positioned on the 3rd air chamber 7 tube wall and is provided with multiple steam vent.
Escape pipe 9 connects the 4th air chamber 6 through the 3rd air chamber 7, and escape pipe 9 is the 5th airway 14 in the part of the 4th air chamber 6, and the 5th airway 14 is by being provided with multiple steam vent on the mouth of pipe and/or tube wall and the 4th air chamber 6 connects.
Embodiment 3
Other structures are identical with embodiment 2, but the second airway 11 is positioned on the tube wall of the second air chamber 4 is provided with multiple steam vent, is not provided with steam vent, by mouth of pipe aerofluxus on the tube wall that the second airway 11 is positioned at the first air chamber 5.4th airway 13 is positioned on the 4th air chamber 6 tube wall and is provided with multiple steam vent, and the 4th airway 13 is positioned on the tube wall of the 3rd air chamber 7 and is not provided with steam vent, by mouth of pipe aerofluxus.
Embodiment 4
Other structures are identical with embodiment 2, but the second airway 11 is positioned on the tube wall of the first air chamber 5 and the second air chamber 4 is provided with multiple steam vent.4th airway 13 is positioned on the tube wall of the 3rd air chamber 7 and the 4th air chamber 6 and is provided with multiple steam vent.The mouth of pipe of the second airway 11 and the 4th airway 13 is closed.
Embodiment 5
A kind of exhaust muffler for internal combustion engine, the escape pipe 9 that directly or indirectly communicates with air including the air inlet pipe 8 being directly or indirectly connected with engine exhaust port, seal casinghousing, it is disposed with the first dividing plate 1, second partition the 2, the 3rd dividing plate 3 inside exhaust muffler for internal combustion engine from air inlet pipe 8 direction, deafener is divided into from left to right the second air chamber the 4, first air chamber the 5, the 4th air chamber 6 and the 3rd air chamber 7.
Air inlet pipe 8 passes into the first air chamber 5 after entering the second air chamber 4 through seal casinghousing, and air inlet pipe 8 is the first airway 10 in the part of the first air chamber 5, and the first airway 10 is by being provided with multiple steam vent on tube wall and the first air chamber 5 connects；First dividing plate 1 is provided with steam vent, in order to connect the first air chamber 5 and the second air chamber 4.
Second air chamber 4 is connected by the 3rd airway 12 with the 3rd air chamber 7.
Arranging installing hole on 3rd dividing plate 3, the 4th airway 13 is connection the 3rd air chamber 7 and the 4th air chamber 6 after installing hole.4th airway 13 is positioned on the tube wall of the 3rd air chamber 7 and is provided with multiple steam vent.
Escape pipe 9 connects the 4th air chamber 6 through the 3rd air chamber 7, and escape pipe 9 is the 5th airway 14 in the part of the 4th air chamber 6, and the 5th airway 14 is by being provided with multiple steam vent on tube wall and the 4th air chamber 6 connects.The left end of the 5th airway 14 is fixing with second partition 2 to be connected.
Claims (9)
1. an exhaust muffler for internal combustion engine, it is characterized in that: escape pipe that the air inlet pipe including directly or indirectly being connected with engine exhaust port directly or indirectly communicates with air, seal casinghousing, it is characterized in that: be disposed with the first dividing plate, second partition, the 3rd dividing plate inside exhaust muffler for internal combustion engine from air inlet pipe direction, deafener is divided into from left to right the second air chamber, the first air chamber, the 4th air chamber and the 3rd air chamber；
Air inlet pipe passes into the first air chamber after entering the second air chamber through seal casinghousing, and air inlet pipe is the first airway in the part of the first air chamber, and the first airway is by being provided with multiple steam vent and the connection of the first air chamber on the mouth of pipe and/or tube wall；First dividing plate is provided with steam vent or the second airway, in order to connect the first air chamber and the second air chamber；
Second air chamber and the 3rd air chamber are by the 3rd airway connection；
3rd dividing plate is provided with steam vent or the 4th airway, in order to connect the 3rd air chamber and the 4th air chamber；
Escape pipe is through the 3rd air chamber connection the 4th air chamber, and escape pipe is the 5th airway in the part of the 4th air chamber, and the 5th airway is by the mouth of pipe and the connection of the 4th air chamber, and/or the 5th airway is by being provided with multiple steam vent and the connection of the 4th air chamber on tube wall.
2. exhaust muffler for internal combustion engine according to claim 1, it is characterized in that: the right-hand member that right-hand member is enclosed construction or the first airway of the first described airway is fixing with second partition is connected and is formed enclosed construction or base closed structure, by tube wall is provided with multiple steam vent and the connection of the first air chamber.
3. exhaust muffler for internal combustion engine according to claim 1, is characterized in that: arrange installing hole on the first described dividing plate, and the second airway connects the first air chamber and the second air chamber after installing hole.
4. exhaust muffler for internal combustion engine according to claim 3, is characterized in that: the second described airway is positioned at the first air chamber or/and the second airway is positioned on the tube wall of the second air chamber is provided with multiple steam vent.
5. exhaust muffler for internal combustion engine according to claim 1, it is characterized in that: the 3rd described airway sequentially passes through and is respectively arranged at the first dividing plate, second partition, the 3rd dividing plate installing hole connect the second air chamber and the 3rd air chamber, the 3rd airway and the first air chamber and the 4th air chamber opposing seal.
6. exhaust muffler for internal combustion engine according to claim 1, is characterized in that: arrange installing hole on the 3rd described dividing plate, and the 4th airway is connection the 3rd air chamber and the 4th air chamber after installing hole.
7. exhaust muffler for internal combustion engine according to claim 6, is characterized in that: the 4th described airway is positioned on the tube wall of the 3rd air chamber or/and the 4th airway is positioned on the tube wall of the 4th air chamber is provided with multiple steam vent.
8. exhaust muffler for internal combustion engine according to claim 1, is characterized in that: the left end of the 5th described airway is enclosed construction, by being provided with multiple steam vent and the connection of the 4th air chamber on tube wall；Or the left end of the 5th airway is fixing with second partition is connected and is formed enclosed construction or base closed structure, by tube wall is provided with multiple steam vent and the connection of the 4th air chamber.
9. exhaust muffler for internal combustion engine according to claim 1, is characterized in that: between the first described air chamber and the 4th air chamber, and between airway and dividing plate, and between seal casinghousing and dividing plate, be base closed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620134726.9U CN205370688U (en) | 2016-02-23 | 2016-02-23 | Exhaust silencer of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620134726.9U CN205370688U (en) | 2016-02-23 | 2016-02-23 | Exhaust silencer of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205370688U true CN205370688U (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620134726.9U Expired - Fee Related CN205370688U (en) | 2016-02-23 | 2016-02-23 | Exhaust silencer of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205370688U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545412A (en) * | 2016-02-23 | 2016-05-04 | 偃师市宇龙金属加工厂 | Exhaust silencer for internal combustion engine |
| US10196947B2 (en) | 2016-02-02 | 2019-02-05 | Kohler Co. | Muffler |
-
2016
- 2016-02-23 CN CN201620134726.9U patent/CN205370688U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10196947B2 (en) | 2016-02-02 | 2019-02-05 | Kohler Co. | Muffler |
| CN105545412A (en) * | 2016-02-23 | 2016-05-04 | 偃师市宇龙金属加工厂 | Exhaust silencer for internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20170223 |
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| CF01 | Termination of patent right due to non-payment of annual fee |