CN106150602A - Silencer for automobile and method of work thereof - Google Patents
Silencer for automobile and method of work thereof Download PDFInfo
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- CN106150602A CN106150602A CN201510135119.4A CN201510135119A CN106150602A CN 106150602 A CN106150602 A CN 106150602A CN 201510135119 A CN201510135119 A CN 201510135119A CN 106150602 A CN106150602 A CN 106150602A
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- waste gas
- wallboard
- escape pipe
- lower clapboard
- air inlet
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Abstract
The present invention relates to a kind of silencer for automobile and method of work thereof, this silencer for automobile includes closed cavity, escape pipe and air inlet pipe are respectively arranged on the two ends of neighbouring closed cavity, the outside of the wallboard of closed cavity is located in one end of escape pipe and the other end is located at the inner side of wallboard, the outside of wallboard is located in one end of air inlet pipe and the other end is located at the inner side of wallboard, inside the wallboard that lower clapboard is located between escape pipe and air inlet pipe, lower clapboard is adjacent with air inlet pipe, lower clapboard is suitable to separate described closed cavity, and lower clapboard offers at least one lower clapboard through hole；The method includes that waste gas enters in air inlet pipe through the exhaustor of internal combustion engine, waste gas via through holes two enters in inlet chamber, the volumetric expansion of waste gas, flows decrease, waste gas enters in the cavity of lower clapboard opposite side through lower clapboard through hole, the volume of waste gas reexpands, flow velocity slows down again, in waste gas enters escape pipe by through hole one and is entered air by escape pipe；Silencer for automobile reduces the exhaust resistance of internal-combustion engine vent-pipe.
Description
Technical field
The present invention relates to a kind of silencer for automobile and method of work thereof, be mainly used in eliminating the exhaust noise of internal-combustion engine vent-pipe.
Background technology
Silencer for automobile mainly utilize sound absorption, expand, the air force attenuation principle such as resonance to be to reduce noise, structure and the research of principle, exploitation to acoustic filter are ripe, but in existing silencer for automobile, air inlet pipe and escape pipe are located in same cavity or air inlet pipe place cavity volume is excessive, make the waste gas in the cavity of air inlet pipe place that heavy turbulence phenomenon to occur, increase the exhaust resistance of internal-combustion engine vent-pipe.
Summary of the invention
The technical problem to be solved is to provide a kind of silencer for automobile, reduces the exhaust resistance of internal-combustion engine vent-pipe.
In order to solve above-mentioned technical problem, the present invention provides a kind of silencer for automobile, comprising: closed cavity, escape pipe and air inlet pipe are respectively arranged on the two ends of neighbouring closed cavity, the outside of the wallboard of closed cavity is located in one end of escape pipe and the other end is located at the inner side of wallboard, the outside of wallboard is located in one end of air inlet pipe and the other end is located at the inner side of wallboard, inside the wallboard that lower clapboard is located between escape pipe and air inlet pipe, lower clapboard is adjacent with air inlet pipe, lower clapboard is suitable to separate described closed cavity, and lower clapboard offers at least one lower clapboard through hole.
Inside the wallboard that upper spacer is located between escape pipe and lower clapboard, upper spacer is adjacent with escape pipe, and upper spacer is suitable to separate described closed cavity, and upper spacer offers at least one upper spacer through hole.
Described closed cavity is divided into the intermediate cavity in the middle part of the outlet chamber at escape pipe place, closed cavity and the inlet chamber at air inlet pipe place by upper spacer, lower clapboard, and the volume of described intermediate cavity is more than outlet chamber or inlet chamber.
Being positioned on the escape pipe sidewall of wallboard and be evenly equipped with multiple through hole one, be positioned on the air inlet pipe sidewall of wallboard and be evenly equipped with multiple through hole two, the right-hand member of escape pipe is provided with the hush panel one for sealing, and the left end of air inlet pipe is provided with the hush panel two for sealing.
Escape pipe, air inlet pipe seal with the junction of wallboard and coordinate.
The present invention also provides for the method for work of a kind of silencer for automobile, comprising: waste gas enters in air inlet pipe through the exhaustor of internal combustion engine, waste gas via through holes two enters in inlet chamber, the volumetric expansion of waste gas, flows decrease, waste gas enters in the cavity of lower clapboard opposite side through lower clapboard through hole, the volume of waste gas reexpands, flow velocity slows down again, in waste gas enters escape pipe by through hole one and is entered air by escape pipe.
Waste gas enters in the intermediate cavity upper and lower dividing plate through lower clapboard through hole, the volume of waste gas reexpands, flow velocity slows down again, waste gas enters in outlet chamber after upper spacer through hole, the volume of waste gas expands again, flow velocity slows down again, in waste gas enters escape pipe by through hole one and is entered air by escape pipe.
Relative to prior art, what the present invention had has the technical effect that
(1) waste gas of internal combustion engine is when air inlet pipe enters the inlet chamber at air inlet pipe place, owing to this inlet chamber is less than the cavity volume of lower clapboard opposite side, compared to existing technology, waste gas swell increment in inlet chamber is less, flow velocity and the pressure range of decrease of waste gas are less, the waste gas turbulent phenomenon in inlet chamber is more weak, reducing exhaust flow impedance, the beneficially waste gas in internal-combustion engine vent-pipe is discharged as early as possible, reduces the exhaust resistance of internal combustion engine.
(2) waste gas of internal combustion engine is when lower clapboard through hole enters the outlet chamber at escape pipe place, and waste gas reexpands in the cavity, and flow velocity and pressure reduce rapidly, makes exhaust gas pressure reduce close to ambient pressure, the gas noise entering the external world from escape pipe.
(3) between escape pipe and lower clapboard, it is provided with upper spacer, thus reduces the volume of escape pipe place outlet chamber, reduce waste gas swell increment in the cavity, reduce the turbulent phenomenon of waste gas in this chamber, make waste gas to discharge from escape pipe quickly.
(4) the intermediate cavity volume between upper and lower dividing plate is more than into and out of air cavity, waste gas is made to carry out the expansion of amplitude peak, blood pressure lowering and deceleration in described intermediate cavity, although the waste gas in this cavity occurs in that the turbulent phenomenon more higher than remaining two cavity, but due to the barrier effect of upper and lower dividing plate, reduce the impact that waste gas flowing in inlet chamber or outlet chamber is produced by the waste gas turbulent flow phenomenon in this cavity.
(5) due in outlet chamber waste gas turbulent flow phenomenon more weak than intermediate cavity, thus in outlet chamber waste gas along escape pipe velocity ratio intermediate cavity outwardly, waste gas flow velocity is faster, in outlet chamber, air pressure is lower than air pressure in intermediate cavity, pressure reduction between the two forms swabbing effect to the waste gas in intermediate cavity, make waste gas be inhaled into outlet chamber from intermediate cavity, promote waste gas flowing in acoustic filter.
(6) due in inlet chamber waste gas turbulent flow phenomenon more weak than intermediate cavity, thus more waste gas enters inlet chamber from internal-combustion engine vent-pipe, make the pressure ratio intermediate cavity in inlet chamber higher, under the effect of this pressure differential, drive waste gas to flow into intermediate cavity from inlet chamber further, promote waste gas flowing in acoustic filter.
(7) through hole one matches with hush panel one, waste gas flow resistance when through hole one enters escape pipe is made to increase, so that the flow velocity of waste gas reduces and make it expand, blood pressure lowering, through hole two matches with hush panel two, waste gas flow resistance when through hole two enters in acoustic filter is made to increase, so that waste gas flow velocity reduces and make it expand, blood pressure lowering, be conducive to reducing exhaust noise.
(8) when waste gas is entered silencer for automobile inner chamber by internal-combustion engine vent-pipe, after aerofluxus sound wave in exhaustor enters acoustic filter, sound wave in the range of setpoint frequency is reflected and makes it cancel out each other by the upper spacer with upper spacer through hole and the lower clapboard with lower clapboard through hole respectively, the energy of sound wave is converted into heat, so that the noise at escape pipe reduces.
(9) escape pipe, air inlet pipe seal with the junction of wallboard and coordinate, it is possible to prevent waste gas to discharge from described junction, give full play to each cavity in acoustic filter to the decompression of waste gas, soundproof effect, be possible to prevent sound wave to spread out of from described junction simultaneously, strengthen the soundproof effect of acoustic filter.
Accompanying drawing explanation
In order to understand the innovative principle of the explanation present invention and compared to the technical advantage of existing product, below by way of accompanying drawing by the possible embodiment of the limiting examples explanation of applying described principle.In the drawings:
Fig. 1 is the structure sectional view of the silencer for automobile of the present invention；
Fig. 2 is the A direction view of the silencer for automobile of the present invention；
Fig. 3 is the upper spacer enlarged drawing of the present invention；
Fig. 4 is the lower clapboard enlarged drawing of the present invention.
Detailed description of the invention
As Figure 1-4, acoustic filter includes: wallboard 1, cover plate 1, cover plate 23, escape pipe 4, air inlet pipe 5, upper spacer 6, lower clapboard 7, inlet pipe connection 8, hush panel 1, hush panel 2 10, through hole 1, through hole 2 12, upper spacer through hole 13, lower clapboard through hole 14, outlet chamber 15, intermediate cavity 16, inlet chamber 17.
nullCylindrical wallboard 1 uses seamless steel pipe，Wallboard 1 upper、Under be respectively arranged at two ends with for sealing cover plate 1 and cover plate 23，The upper end of neighbouring wallboard 1 is provided with escape pipe 4，The left end opening of this escape pipe 4 and stretching out outside wallboard 1，In escape pipe 4 remainder is located at wallboard 1 and the right-hand member of escape pipe 4 is adjacent to the right side inwall of wallboard 1，Escape pipe 4 is adjacent with cover plate 1，Escape pipe 4 seals with the junction of wallboard 1，The right-hand member of escape pipe 4 is provided with the hush panel 1 for sealing，It is positioned on escape pipe 4 sidewall of wallboard 1 and is evenly equipped with multiple through hole 1，The central axis upright of escape pipe 4 is in the central axis of wallboard 1，The downside of escape pipe 4 is adjacent is provided with upper spacer 6，Upper spacer 6 is provided with multiple upper spacer through hole 13，Upper spacer 6 and the wallboard 1 above it、Cover plate 1 forms outlet chamber 15，The downside of upper spacer 6 is provided with lower clapboard 7，Lower clapboard 7 is provided with multiple lower clapboard through hole 14，Upper spacer 6、Lower clapboard 7 and wallboard 1 concentrically axis，Upper spacer 6、Lower clapboard 7 forms intermediate cavity 16 with wallboard 1 between the two，The lower section of lower clapboard 7 and the lower end of neighbouring wallboard 1 are provided with air inlet pipe 5，Air inlet pipe 5 is mutually perpendicular to wallboard 1 central axis，The right-end openings of air inlet pipe 5 and stretching out outside wallboard 1，In the remainder of air inlet pipe 5 is located at wallboard 1 and the left end of air inlet pipe 5 is adjacent to the inner left wall of wallboard 1，Lower clapboard 7 and wallboard 1 below、Cover plate 23 forms inlet chamber 17，Air inlet pipe 5 seals with the junction of wallboard 1，The left end of air inlet pipe 5 is provided with the hush panel 2 10 for sealing，It is positioned on air inlet pipe 5 sidewall of wallboard 1 and is evenly equipped with multiple through hole 2 12，Air inlet pipe 5 is adjacent with cover plate 23，The right-hand member of air inlet pipe 5 is connected with one end of inlet pipe connection 8，The exhaustor that the other end of inlet pipe connection 8 is suitable to internal combustion engine is connected.
The work process of this acoustic filter includes: the arrow in Fig. 1 represents the flow direction of waste gas, waste gas enters inlet pipe connection 8 through the exhaustor of internal combustion engine, enter afterwards in air inlet pipe 5, waste gas via through holes 2 12 enters in inlet chamber 17, the volumetric expansion of waste gas, flows decrease, pressure reduces, waste gas enters in intermediate cavity 16 through lower clapboard through hole 14, the volume of waste gas reexpands, flow velocity slows down again, pressure reduces again, waste gas enters in outlet chamber 15 after upper spacer through hole 13, the volume third time of waste gas expands, flow velocity third time slows down, pressure third time reduces, waste gas enters in escape pipe 4 by through hole 1, and entered air by escape pipe 4.
Waste gas expands in each cavity of acoustic filter, slows down, blood pressure lowering, so that being ultimately discharged into the exhaust gas pressure of air close to atmospheric pressure, reduces exhaust noise；The spacing of the upper and lower dividing plate in this acoustic filter at least accounts for the 1/2 of wallboard axial length, thus the volume of the intermediate cavity 16 between two dividing plates is more than outlet chamber 15 or inlet chamber 17, makes waste gas swell increment in middle intermediate cavity 16 bigger.Occurring the inconsistent of the flow direction in the flowing direction owing to waste gas can produce turbulent flow, i.e. waste gas in expansion process in cavity, waste expansion amount is the biggest, then flow velocity decline is the fastest, the pressure range of decrease is the biggest, and the turbulent phenomenon of waste gas is the most serious.If the inlet chamber 17 at air inlet pipe 5 place occurring serious waste gas turbulent flow phenomenon, waste gas being hindered to enter in acoustic filter from exhaustor, increase the pressure at expulsion in exhaustor, the exhaust resistance of increasing combustion engine, be unfavorable for the normal work of internal combustion engine；If occurring serious waste gas turbulent flow phenomenon in the outlet chamber 15 at escape pipe 4 place, being discharged in time by obstruction waste gas, making more waste gas assemble in outlet chamber 15, in this cavity, exhaust gas pressure raises, and increases the noise of aerofluxus.In this acoustic filter there is the intermediate cavity 16 between two dividing plates in maximum swelling amount, effectively prevent and occurs serious waste gas turbulent flow phenomenon in air inlet pipe 5 or the inlet chamber 17 at escape pipe 4 place or outlet chamber 15.
Additionally, when waste gas is entered silencer for automobile inner chamber by internal-combustion engine vent-pipe, after aerofluxus sound wave in exhaustor enters acoustic filter, sound wave in the range of setpoint frequency is reflected and makes it cancel out each other by the upper spacer 6 with upper spacer through hole 13 and the lower clapboard 7 with lower clapboard through hole 14 respectively, the energy of sound wave is converted into heat, so that the noise at escape pipe 4 reduces.
Obviously, above-described embodiment is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And these spirit belonging to the present invention are extended out obvious change or variation still in protection scope of the present invention among.
Claims (7)
1. a silencer for automobile, it is characterized in that including: closed cavity, escape pipe (4) and air inlet pipe (5) are respectively arranged on the two ends of neighbouring closed cavity, the outside of the wallboard (1) of closed cavity is located in one end of escape pipe (4) and the other end is located at the inner side of wallboard (1), the outside of wallboard (1) is located in one end of air inlet pipe (5) and the other end is located at the inner side of wallboard (1), wallboard (1) inner side that lower clapboard (7) is located between escape pipe (4) and air inlet pipe (5), lower clapboard (7) is adjacent with air inlet pipe (5), lower clapboard (7) is suitable to separate described closed cavity, at least one lower clapboard through hole (14) is offered on lower clapboard (7).
Silencer for automobile the most according to claim 1, it is characterized in that: wallboard (1) inner side that upper spacer (6) is located between escape pipe (4) and lower clapboard (7), upper spacer (6) is adjacent with escape pipe (4), upper spacer (6) is suitable to separate described closed cavity, and upper spacer (6) offers at least one upper spacer through hole (13).
Silencer for automobile the most according to claim 2, it is characterized in that: described closed cavity is divided into the inlet chamber (17) at the intermediate cavity (16) in the middle part of the outlet chamber (15) at escape pipe (4) place, closed cavity and air inlet pipe (5) place by upper spacer (6), lower clapboard (7), the volume of described intermediate cavity (16) is more than outlet chamber (15) or inlet chamber (17).
4. according to the silencer for automobile one of claim 1-3 Suo Shu, it is characterized in that: be positioned on escape pipe (4) sidewall of wallboard (1) and be evenly equipped with multiple through hole one (11), it is positioned on air inlet pipe (5) sidewall of wallboard (1) and is evenly equipped with multiple through hole two (12), the right-hand member of escape pipe (4) is provided with the hush panel one (9) for sealing, and the left end of air inlet pipe (5) is provided with the hush panel two (10) for sealing.
5. according to the silencer for automobile one of claim 1-3 Suo Shu, it is characterised in that: escape pipe (4), air inlet pipe (5) seal with the junction of wallboard (1) and coordinate.
6. the method for work of a silencer for automobile, it is characterized in that: waste gas enters in air inlet pipe (5) through the exhaustor of internal combustion engine, waste gas via through holes two (12) enters in inlet chamber (17), the volumetric expansion of waste gas, flows decrease, waste gas enters in the cavity of lower clapboard (7) opposite side through lower clapboard through hole (14), the volume of waste gas reexpands, flow velocity slows down again, in waste gas enters escape pipe (4) by through hole one (11) and is entered air by escape pipe (4).
The method of work of silencer for automobile the most according to claim 6, it is characterized in that: the intermediate cavity (16) that waste gas enters upper and lower dividing plate through lower clapboard through hole (14) is interior, the volume of waste gas reexpands, flow velocity slows down again, in waste gas enters outlet chamber (15) afterwards through upper spacer through hole (13), the volume of waste gas expands again, flow velocity slows down again, in waste gas enters escape pipe (4) by through hole one (11) and is entered air by escape pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510135119.4A CN106150602A (en) | 2015-03-25 | 2015-03-25 | Silencer for automobile and method of work thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510135119.4A CN106150602A (en) | 2015-03-25 | 2015-03-25 | Silencer for automobile and method of work thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106150602A true CN106150602A (en) | 2016-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510135119.4A Pending CN106150602A (en) | 2015-03-25 | 2015-03-25 | Silencer for automobile and method of work thereof |
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| Country | Link |
|---|---|
| CN (1) | CN106150602A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004013219U1 (en) * | 2004-08-16 | 2004-10-14 | As-Motor Germany Gmbh & Co. Kg | Exhaust silencer for an internal combustion engine comprises an inlet pipe passing through a wire catalyst and through which an exhaust gas flows against the direction of flow from a deviating chamber |
| CN203035309U (en) * | 2013-01-07 | 2013-07-03 | 浙江金飞车辆配件制造有限公司 | Gasoline engine muffler |
| CN203594491U (en) * | 2013-10-25 | 2014-05-14 | 黑龙江工程学院 | Silencer of automobile |
| CN204163805U (en) * | 2014-02-02 | 2015-02-18 | 金坛市佳越机械有限公司 | A kind of diesel engine silencer of exempting from stretching anechoic chamber structure |
| CN204511576U (en) * | 2015-03-25 | 2015-07-29 | 常州科普动力机械有限公司 | Silencer for automobile |
-
2015
- 2015-03-25 CN CN201510135119.4A patent/CN106150602A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004013219U1 (en) * | 2004-08-16 | 2004-10-14 | As-Motor Germany Gmbh & Co. Kg | Exhaust silencer for an internal combustion engine comprises an inlet pipe passing through a wire catalyst and through which an exhaust gas flows against the direction of flow from a deviating chamber |
| CN203035309U (en) * | 2013-01-07 | 2013-07-03 | 浙江金飞车辆配件制造有限公司 | Gasoline engine muffler |
| CN203594491U (en) * | 2013-10-25 | 2014-05-14 | 黑龙江工程学院 | Silencer of automobile |
| CN204163805U (en) * | 2014-02-02 | 2015-02-18 | 金坛市佳越机械有限公司 | A kind of diesel engine silencer of exempting from stretching anechoic chamber structure |
| CN204511576U (en) * | 2015-03-25 | 2015-07-29 | 常州科普动力机械有限公司 | Silencer for automobile |
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Application publication date: 20161123 |