CN2192726Y - Damping muffler for engine - Google Patents
Damping muffler for engine Download PDFInfo
- Publication number
- CN2192726Y CN2192726Y CN 94210641 CN94210641U CN2192726Y CN 2192726 Y CN2192726 Y CN 2192726Y CN 94210641 CN94210641 CN 94210641 CN 94210641 U CN94210641 U CN 94210641U CN 2192726 Y CN2192726 Y CN 2192726Y
- Authority
- CN
- China
- Prior art keywords
- chamber
- motor
- cross over
- pipe
- dividing plate
- 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.)
- Expired - Fee Related
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- Exhaust Silencers (AREA)
Abstract
The utility model discloses a muffler which is an element in an engine exhaust system. The muffler adopts a cavity division and pipe insertion structure. A barrier hole type damper is arranged in a third cavity (turbulent flow cavity). Shock vibration due to multiple times of airflow rotation and formed vortexes in the muffler can be eliminated. Exhaust noise and unnecessary power lossare lowered.
Description
The utility model relates to parts---the silencing apparatus in the engine exhaust system, this silencing apparatus has reduced exhaust sound greatly, reduces noise circumstance and pollutes.
No matter silencing apparatus is inner-intubation or bores a hole board-likely, all be to adopt to increase exhaust resistance and reduce noise.Just the waste gas of motor is big more by the resistance of silencing apparatus, and exhaust sound is low more.Similarly can cause the loss of power also big, the design people set forth in the utility model patent of the patent No. 90213836.7 motors fire prevention subtracting cigarette silencing apparatus, silencing apparatus is which kind of structure no matter, and it is mobile all to be that the waste gas that allows motor discharge repeatedly circles round in silencer chamber, increases gas-flow resistance.This must cause the impact of silencing apparatus inner chamber and vibrations, and air-flow forms eddy current in the chamber, has more increased the unnecessary loss of power.For reducing unnecessary moving rate loss, just designed 90213836.7 patent, adopted the chamber separation intubation type compages.The waste gas that motor is discharged is directly injected second chamber of silencing apparatus by exhaust core pipe, is back to first chamber, turns back to the 3rd chamber.Can in limited space, increase the number of times that circles round of air-flow like this, guarantee the noise elimination effect, and the resonant panel of band circular hole is housed, on the chamber wall in second chamber (heat collector cavity) and the 3rd chamber (turbulent chamber) with the elimination impact endurance test shock that air-flow produces in air-flow circles round and the eddy current of formation.Reduce power loss.By test in practice, its silencing apparatus performance all produces very big effect with reducing the engine power loss, but aborning, because the placement location manufacturability of resonant panel is bad, can't adapt to industrial needs, and lots of production does not increase always.
In light of this situation, product is suitable to give the industrial production manufacturing to the purpose of this utility model in order to make exactly, and guarantees that usability or performance are better.
The utility model is realized by resonant panel being changed into damper.The damping sound-deadening device of this chamber separation intubation type structure, the waste gas that motor is discharged is directly injected second chamber (heat collector cavity) of damping sound-deadening device by exhaust core pipe, air-flow is back to first chamber through diffusing tube, directly insert the 3rd chamber (turbulent chamber) through cross over pipe then, be injected in and be contained in having on the U-shaped damper of through hole on the 3rd chamber dividing plate by regularity row.Damper is the dull and stereotyped U-shaped that forms, and embark on journey and arranging through hole in bi-side, and the every row of through hole that arranged on both sides is embarked on journey is dislocatedly distributed relatively.Place over against cross over pipe the side.The optimum width of side is motor gross exhaust gas and piston diameter multiply by engine cylinder number than last engine compression ratio a variation coefficient.Make the air-flow that sprays by cross over pipe pass through hole on the damper side, because the through hole of bi-side intersects dislocation and arrange, not over against together, thereby air-flow scatters reach that gas shock that elimination produces is vibrated and the eddy current of generation in air-flow circles round.Reduce unnecessary exhaust resistance, reduced power consumpiton.Through measuring in actual use under the user mode and power consumption identical with former patented product, its noise elimination is effective, can both reduce more than one decibel generally speaking, best reaches two decibels.In the manufacturing, parts can be made in one, two, three chambeies, push again in the shell, reach the technological requirement of batch process.Realized purpose of design of the present utility model.
Fig. 1 the utility model motor damping sound-deadening device structural representation
Damper side U-shaped in Fig. 2 the utility model
Damper optimum structure schematic representation in Fig. 3 the utility model
Drawing explanation: 1. tail pipe, 2. end cap, 3. housing, 4. dividing plate I, 5. damper, 6. cross over pipe, 7. dividing plate II, 8. dividing plate III, 9. primary resonant plate, 10. diffusing tube, 11. exhaust core pipes, 12. end caps.
The utility model motor damping sound-deadening device is done the elaboration of further visualization by diagram.Same illustrated schematic representation also is the most typical structural representation of the utility model, thereby the design person is illustrated as embodiment with this.
Exhaust core pipe (11) directly is inserted in second chamber, and on analysing and observe from A-A, right side great circle is exhaust core pipe (11), changes clockwise, and first circle is diffusing tube (10), and second circle is cross over pipe (6), and the 3rd is diffusing tube, and the 4th is cross over pipe.Present embodiment two cross over pipes, two diffusing tubes.This cylinder number and the air displacement that will look motor is decided.Primary resonant plate (9) is not to be placed on the wall of chamber, but has been enclosed within on the cross over pipe.The damper (5) in the 3rd chamber (turbulent chamber) is welded on the dividing plate II (7), and the side is facing to cross over pipe (6).The size of damper is determined by the cylinder number and the air displacement of application engine, its optimum width H millimeter.
H=(VD)/(m) K V---engine total displacement
D---piston diameter
The compression ratio of m---motor
K---variation coefficient
Ctg60 ° of i of K=(D)/(i)---the cylinder number of motor
The height L millimeter of damper
L＝2H
Damper hole pitch b millimeter
b＝3d
The diameter d millimeter of damper side through hole
d＝ (D)/(V)
Thickness b circular arc R h=Hi R=1/2 h
After engine parameter was determined like this, the optimum width of damper just can determine that other parameters have just designed.At this moment, exhaust core pipe (11), diffusing tube (10), primary resonant plate (9), dividing plate III (8), dividing plate II (7).Cross over pipe (6), damper (5) can be on production line be formed parts by illustrated position welding fabrication, is placed in the shell (3), go up on the corresponding position at shell (3) and box out, outer surface with dividing plate spot welding on shell.Tail pipe (1) is constant with former patented product structure on the position in the 4th chamber.Enforcement is finished, and purpose of design reaches.
Claims (2)
1, a kind of have four chambeies and install exhaust manifold respectively on four chamber dividing plate, the chamber separation intubation type motor damping sound-deadening device of cross over pipe, diffusing tube, tail pipe, it is characterized in that exhaust core pipe directly inserts second chamber (heat collector cavity) of motor damping sound-deadening device, device has the U type damper that logical prince wife is arranged by regularity row on the dividing plate in the 3rd chamber.
2, the motor damping sound-deadening device of narrating according to claim 1, it is characterized in that said U type damper, embark on journey and arranging through hole in bi-side, and the every row of the through hole of embarking on journey in both sides is dislocatedly distributed relatively, the side faces cross over pipe and places, and the optimum width of side is the gross exhaust gas of motor and piston diameter multiply by engine cylinder number than the compression ratio of last motor variation coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94210641 CN2192726Y (en) | 1994-05-08 | 1994-05-08 | Damping muffler for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94210641 CN2192726Y (en) | 1994-05-08 | 1994-05-08 | Damping muffler for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2192726Y true CN2192726Y (en) | 1995-03-22 |
Family
ID=33827995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94210641 Expired - Fee Related CN2192726Y (en) | 1994-05-08 | 1994-05-08 | Damping muffler for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2192726Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093907C (en) * | 1999-06-22 | 2002-11-06 | 简志坚 | Muffler suitable for backpressure regulation |
| CN101963081A (en) * | 2010-08-12 | 2011-02-02 | 上海汽车工业(集团)总公司 | Fuel cell engine exhaust silencer |
-
1994
- 1994-05-08 CN CN 94210641 patent/CN2192726Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093907C (en) * | 1999-06-22 | 2002-11-06 | 简志坚 | Muffler suitable for backpressure regulation |
| CN101963081A (en) * | 2010-08-12 | 2011-02-02 | 上海汽车工业(集团)总公司 | Fuel cell engine exhaust silencer |
| CN101963081B (en) * | 2010-08-12 | 2013-07-17 | 上海汽车集团股份有限公司 | Fuel cell engine exhaust silencer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |