CN2934587Y - Exhaust silencing apparatus for internal combustion engine - Google Patents
Exhaust silencing apparatus for internal combustion engine Download PDFInfo
- Publication number
- CN2934587Y CN2934587Y CN 200620032170 CN200620032170U CN2934587Y CN 2934587 Y CN2934587 Y CN 2934587Y CN 200620032170 CN200620032170 CN 200620032170 CN 200620032170 U CN200620032170 U CN 200620032170U CN 2934587 Y CN2934587 Y CN 2934587Y
- Authority
- CN
- China
- Prior art keywords
- chamber
- pipe
- silencer
- exhausting
- noise reduction
- 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
Links
Images
Landscapes
- Exhaust Silencers (AREA)
Abstract
An exhaust muffler of internal combustion engine includes an intake noise elimination tube and an exhaust noise elimination tube arranged in the inner cavity. The inner cavity of the shell is divided into four cavities by clapboards, which are set up in sequence from anterior to posterior, the clapboard (3), (7), have stomata communicating with the anterior cavity and the posterior cavity and the closed-end of the intake noise elimination tube gets through the front end cover clapboard (3), enters the chamber (II), (I) and is combined with the clapboard (6) in sequence; The exhaust noise elimination tube consists of two exhaust noise elimination tubes with different diameter and length and the open ending of the exhaust noise elimination tube (9) with bigger diameter and shorter length is arranged with an exhaust control valve; An intermediate noise elimination tube is arranged parallel to the axis of the intake noise elimination tube in the cavity, the open ending of which is arranged in the cavity (II) and the closed-ending of which is arranged in the cavity (III). The muffler can always maintain the air speed of exhaust pipe at the best value in a particular, the muffler insertion loss (muffler volume) always at the maximum and the power loss ratio always at the minimum.
Description
Technical field
The utility model relates to a kind of silencing apparatus, the particularly a kind of exhaust silencer for internal-combustion engine that can control outlet pipe sectional area size automatically.
Background technique
The exhaust silencer for internal-combustion engine of prior art mostly is single tube type structure (outlet pipe is housed), and minority is two-pipe structure (two outlet pipes is housed).No matter be to adorn one or two outlet pipes, their cross-section area all immobilizes.That is to say that the outlet pipe of prior art can not change the circulation area of its outlet pipe with the variation of extraction flow.Specifically, for the exhaust silencer for internal-combustion engine that adopts more elongated pipe as outlet pipe, though can satisfy the requirement under moderate duty, the medium rotating speed, noise reduces, but when internal-combustion engine enters big load, the operation of high rotating speed, because extraction flow increases, exhaust velocity increases, resistance increases, and the regenerated noise that air-flow produces also obviously increases, and makes noise, power loss increase thereupon.Otherwise for adopting more short and thick pipe as the outlet pipe exhaust silencer for internal-combustion engine, though can satisfy load greatly, high rotating speed, requirement that noise is low, when moving at moderate duty, below the medium rotating speed, its noise strengthens on the contrary.
Summary of the invention
The purpose of this utility model provides a kind of exhaust silencer for internal-combustion engine that can control outlet pipe sectional area size automatically at existing deficiency in the above-mentioned prior art just.
The purpose of this utility model can realize by following technique measures:
Exhaust silencer for internal-combustion engine of the present utility model comprises the housing of being made up of forward and backward end cap and hollow cylinder, and be arranged on the exhausting silencer pipe that is processed with a plurality of pores on the intake noise reduction pipe that is processed with a plurality of pores on the root canal wall in the housing inner chamber and at least one root canal wall, described housing inner chamber is separated into four chambers by setting gradually three dividing plates from front to back, be II, I, four chambers of III, IV, and be arranged in all offer on forward and backward two dividing plates of housing inner chamber be communicated with before and after the pore in chamber; The closed end of described intake noise reduction pipe passes the through hole that processes on front cover, the preceding dividing plate successively and enters in chamber II and the I, terminates in intermediate clapboard, and combines with intermediate clapboard; Described exhausting silencer pipe is made up of diameter, two exhausting silencer pipes that length is different, the closed end of two exhausting silencer pipes passes the through hole that processes on the rear end cover respectively and enters chamber IV, terminate in rear bulkhead, and combine with rear bulkhead, in two exhausting silencer pipes big, the length of diameter the opening end of a short short and thick exhausting silencer pipe be provided with gas exhausting valve; In chamber II, I, III, be provided with the middle hush tube that is processed with a plurality of pores at least one root canal wall in the mode that is parallel to the intake noise reduction tube's axis, the opening end of this centre hush tube is positioned at chamber II, and its closed end is positioned at chamber III, and combines with rear bulkhead.
The utility model is provided with the middle hush tube that is processed with a plurality of pores on two root canal walls in the mode that is parallel to the intake noise reduction tube's axis in chamber II, I, III, hush tube cross sectional area sum is greater than the cross sectional area of intake noise reduction pipe in the middle of two; Described pore is all processed and is being arranged on the tube wall section of chamber III, and the area sum of a plurality of pores is greater than middle hush tube cross sectional area.
Gas exhausting valve described in the utility model be diaphragm type automatic vent control valve as gas exhausting valve, the elongated exhausting silencer pipe tube chamber that the epicoele of this diaphragm type automatic vent control valve is less with diameter by pipeline, length is long is connected.Certain described gas exhausting valve also can adopt the valve of other any known technology to realize, such as one-way valve etc.
The area sum of a plurality of pores that process on the described exhausting silencer tube wall is greater than exhausting silencer pipe cross sectional area; The elongated exhausting silencer pipe cross sectional area that diameter is less in two exhausting silencer pipes, length is long is less than intake noise reduction pipe cross sectional area; And the short and thick exhausting silencer pipe cross sectional area that diameter is big, length is short is greater than intake noise reduction pipe cross sectional area.
Described intake noise reduction pipe is arranged in pore quantity on the tube wall section of chamber I more than the stomatal number that is arranged on the chamber II tube wall section, and on two sections tube wall sections the area sum of pore greater than intake noise reduction pipe cross sectional area.
Described chamber I＞chamber IV＞chamber III＞chamber II; The area sum of pore is greater than intake noise reduction pipe cross sectional area on the dividing plate before described, and the area sum of pore is equally also greater than intake noise reduction pipe cross sectional area on the rear bulkhead.
Working principle of the present utility model and advantage are as follows:
When internal-combustion engine at moderate duty, when working under the medium speed conditions, high temperature from the internal-combustion engine discharge, the high speed pulse pneumatic enters after the silencing apparatus intake noise reduction pipe of the present utility model, go up pore (aperture) ejection from this pipe, the gas major part is sprayed among the chamber I to expand, buffering, fraction is sprayed among the chamber II to expand, buffering, gas flow direction changes 90 °, gas among the chamber I enters among the chamber II (also can be in pore plug-in mounting breathing pipe by the pore on the preceding dividing plate, gas is entered among the chamber II) via breathing pipe, and with chamber II in gas enter after compiling in the middle of hush tube, and be positioned at pore ejection on the chamber III tube wall section from it, in chamber III, expand, buffering, gas among the chamber III is by (also can be in the pore plug-in mounting breathing pipe of the pore on the rear bulkhead, gas is entered via breathing pipe) enter among the chamber IV and expand, buffering, gas among the chamber IV enters tube chamber by the pore on the elongated exhausting silencer pipe, enters in the atmosphere after compiling.Because the gas flow rate that enters in the elongated exhausting silencer pipe is lower, the degree of vacuum of the diaphragm type automatic vent control valve epicoele that is connected with elongated exhausting silencer pipe is less, the height that diaphragm in the autocontrol valve raises up is little, can not make valve open, and at this moment short and thick exhausting silencer pipe is not worked.
Load increase when internal-combustion engine, when rotating speed reaches a certain value, airspeed is also accelerated thereupon in the elongated exhausting silencer pipe, the diaphragm type automatic vent control valve epicoele that meanwhile is connected with elongated exhausting silencer pipe degree of vacuum under the pumping action of high velocity air also strengthens thereupon, diaphragm is under action of pressure, raise up, with valve open, the major part of gas just can be discharged by short and thick exhausting silencer pipe among the chamber IV at this moment, fraction is discharged by elongated exhausting silencer pipe, realize two-tubely working simultaneously, make and discharge airspeed and be controlled in the optimum range, exhaust sound is minimum.After exhaust velocity drops to certain value, the degree of vacuum of the diaphragm type automatic vent control valve epicoele that is connected with elongated exhausting silencer pipe diminishes thereupon, the height that diaphragm in the autocontrol valve raises up descends, valve closing, short and thick exhausting silencer pipe quits work, gas among the chamber IV just can enter tube chamber by the vent on the elongated exhausting silencer pipe, enters in the atmosphere after compiling.This shows that the unlatching of valve or to close be by the decision of the degree of vacuum of diaphragm type automatic vent control valve epicoele size is just by the decision of the airspeed in the elongated exhausting silencer pipe.
The utility model one is the in good time unlatching by gas exhausting valve, and the airspeed in the exhausting silencer pipe is remained in the preferred range, reaches to reduce exhaust sound, reduce exhaust resistance, reduce the purpose of power loss and oil consumption.
The 2nd, by " throttling " effect of aperture on each hush tube and each hush tube and the gas storage storage pressure effect of each chamber, the high temperature, the high speed pulse pneumatic that enter in the silencing apparatus are transformed into the more stable air-flow that temperature is lower, airspeed is lower, thereby the strong noise value of the air-flow of pulsation generation drops to lower noise figure at a high speed, reaches the noise reduction purpose.
Moreover, each pipe all is an end opening, the other end sealing, air-flow can only or suck from aperture ejection on the pipe, and makes each hush tube airflow direction all do to change 90 °, the process of gas from the intake noise reduction pipe to the exhausting silencer pipe, air-flow harmony wave current direction constantly changes, and air-flow and sound wave stream is broken away from, and have part to be 180 ° of motions of opposite direction, the damping coefficient of sound wave increases, and noise descends.Simultaneously, because each hush tube all adopts spray or suction structure, a big strand air-flow is dispersed into the ejection of hundreds of thigh little airflow, is subjected to the rubbing action of little hole wall in the sound wave transmittance process, noise descends; In addition, spray, inhale flow structure and also have the shift frequency effect, low frequency can be shifted to middle and high frequency, be convenient to eliminate the noise, and with middle and high frequency displacement to the unheard ultra-high frequency of people's ear, play the effect that reduces noise.Also the air-flow (sound wave) because of aperture ejection on each hush tube has phase difference, crest and the trough part of can cancelling out each other, thus help noise reduction.Simultaneously, the air-flow (sound wave) that comes out from chamber I is subjected to the interference effect of chamber II air-flow, and phase difference is also arranged, and also can reduce partial noise.
The beneficial effects of the utility model are: the interior airspeed of outlet pipe of exhaust silencer for internal-combustion engine is remained in a certain optimum value, make the insertion loss (sound deadening capacity) of silencing apparatus remain at maximum value, power loss ratio remains at minimum value.Experimental results show that: when little load, the slow-speed of revolution, the exhaust simultaneously of single elongate pipe vent ratio double joint pipe reduces noise 5～8dB (A); High rotating speed, when loading greatly, the exhaust simultaneously of double joint pipe reduces noise 5～10dB (A) than the exhaust of single elongate pipe again.
Description of drawings
Fig. 1 is the structural representation of traditional exhaust silencer for internal-combustion engine.
Among Fig. 1: 1 ' be the intake noise reduction pipe, 2 ' be front cover, 3 ' be housing, 4 ' be dividing plate, 5 ' be dividing plate, 6 ' be dividing plate, 7 ' be the exhausting silencer pipe, 8 ' be rear end cover.
Fig. 2 is a structural drawing of the present utility model.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the B-B sectional view of Fig. 2.
Fig. 5 is a kind of embodiment's (diaphragm type automatic vent control valve) of gas exhausting valve in the utility model a structural drawing, is illustrated as closed state.
Fig. 6 is the opening state figure of Fig. 5.
Fig. 7 is the structural drawing of second kind of embodiment (one-way valve) of gas exhausting valve in the utility model.
Fig. 8 is the opening state figure of Fig. 7.
Among the figure: the 1st, front cover, the 2nd, housing, the 3rd, dividing plate, the 4th, intake noise reduction pipe, the 5th, middle hush tube, the 6th, dividing plate, the 7th, dividing plate, the 8th, rear end cover, the 9th, short and thick exhausting silencer pipe, the 10th, gas exhausting valve, 11 is the exhausting silencer pipe, the 12nd, pore, the 13rd, middle hush tube, the 14th, pore, the 15th, diaphragm, the 16th, the spool that constitutes by flap, valve rod, spring, the 17th, valve seat, the 18th, air chamber, the 19th, the epicoele of air chamber, the 20th, pipeline, the 21st, valve seat, the 22nd, valve plate, the 23rd, fixed base plate, the 24th, spring, the 25th, exhaust port.
Embodiment
The utility model is further described below in conjunction with embodiment's (accompanying drawing), but does not limit the utility model.
As Fig. 2,3, shown in 4, the utility model exhaust silencer for internal-combustion engine comprises by preceding, the housing 2 that rear end cover and hollow cylinder are formed, and be arranged on the exhausting silencer pipe 9 and 11 that is processed with a plurality of pores on the intake noise reduction pipe 4 that is processed with a plurality of pores on the root canal wall in housing 2 inner chambers and two root canal walls, described housing inner chamber is by setting gradually dividing plate 3 from front to back, 6,7 are separated into four chamber II, I, III, IV, described dividing plate 3, all offer the pore 12 and 14 in chamber before and after being communicated with on 7, the closed end of described intake noise reduction pipe 4 passes front cover 1 successively, the through hole that processes on the dividing plate 3 enters chamber II, I, terminate in dividing plate 6, and with dividing plate 6 Joints; Described exhausting silencer pipe is made up of diameter, two exhausting silencer pipes 9 and 11 that length is different, the closed end of two exhausting silencer pipes passes the through hole that processes on the rear end cover 8 respectively and enters chamber IV, terminate in dividing plate 7, and with dividing plate 7 Joints, in two exhausting silencer pipes big, the length of diameter the opening end of a short short and thick exhausting silencer pipe 9 be provided with diaphragm type automatic vent control valve 10; This diaphragm type automatic vent control valve comprises and is positioned at exhausting silencer pipe 9 intraluminal valve seats 17, the spool 16 that constitutes by flap, valve rod, spring that matches with valve seat 17, and be arranged on air chamber 18 on exhausting silencer pipe 9 outer tube walls, described air chamber is separated into two chambeies up and down by diaphragm 15, elongated exhausting silencer pipe 11 tube chambers that its epicoele 19 is less with diameter by pipeline 20, length is long are connected, the upper end of described valve rod is inserted in the air chamber cavity of resorption by the axis hole that is arranged on air chamber bottom, its top contact with the bottom surface of diaphragm (shown in Fig. 5,6); In chamber II, I, III, be provided with the middle hush tube 5 and 13 that is processed with a plurality of pores on two root canal walls in the mode that is parallel to intake noise reduction pipe 4 axis, the opening end of this centre hush tube is positioned at chamber II, and its closed end is positioned at chamber III, and with dividing plate 7 Joints; The area sum of hush tube cross section is greater than the area of the cross section of intake noise reduction pipe in the middle of two; Described pore is all processed and is being arranged on the tube wall section of chamber III, and the area sum of a plurality of pores is greater than the area of middle hush tube cross section.
The pipe of intake noise reduction described in the utility model 4 is arranged in pore quantity on the tube wall section of chamber I more than the stomatal number that is arranged on the chamber II tube wall section, and on two sections tube wall sections the area sum of pore greater than the area of intake noise reduction pipe cross section; The gross area of a plurality of pores that process on the described exhausting silencer tube wall is greater than the area of exhausting silencer pipe cross section; Described chamber I＞chamber IV＞chamber III＞chamber II; The area sum of set pore 14 is greater than the area of intake noise reduction pipe 4 cross sections on the described dividing plate 3, and the area sum of set pore 12 is greater than the area of intake noise reduction pipe 4 cross sections on the dividing plate 7.
In two exhausting silencer pipes described in the utility model less, the length of diameter the cross sectional area of long elongated exhausting silencer pipe 11 less than the area of intake noise reduction pipe 4 cross sections; And the area of short and thick exhausting silencer pipe 9 cross sections that diameter is big, length is lacked is greater than the area of intake noise reduction pipe 4 cross sections.
Gas exhausting valve described in the utility model also can adopt the one-way valve shown in Fig. 7,8, this unidirectional gas exhausting valve comprises and is positioned at exhausting silencer pipe 9 intraluminal valve seats 21, match with valve seat 21 by valve plate 22, fixed base plate 23, be arranged on the spool that the spring 24 between valve plate and the fixed base plate constitutes, on fixed base plate 23, offer the exhaust port 25 that is connected with atmosphere.Its working principle is as follows: when the load increase of internal-combustion engine, when rotating speed reaches a certain value, because the pressure among the chamber IV increases, pressure difference overcomes the elastic force of unidirectional gas exhausting valve, and unidirectional gas exhausting valve is backed down, and the major part of gas just can be discharged by short and thick exhausting silencer pipe among the chamber IV, fraction is discharged by elongated exhausting silencer pipe, realize two-tubely working simultaneously, make and discharge airspeed and be controlled in the optimum range, exhaust sound is minimum.When a certain value was led in airspeed decline, along with the valve that reduces of pressure is also closed thereupon, short and thick exhausting silencer pipe quit work.
Claims (8)
1, a kind of exhaust silencer for internal-combustion engine, it comprises by preceding, the housing (2) that rear end cover and hollow cylinder are formed, and be arranged on the exhausting silencer pipe that is processed with a plurality of pores on the intake noise reduction pipe (4) that is processed with a plurality of pores on the root canal wall in housing (2) inner chamber and at least one root canal wall, described housing inner chamber is by setting gradually dividing plate (3) from front to back, (6), (7) be separated into four chambers (II), (I), (III), (IV), described dividing plate (3), (7) all offer the pore in chamber before and after being communicated with on, it is characterized in that: the closed end of described intake noise reduction pipe (4) passes front cover (1) successively, the through hole that processes on the dividing plate (3) enters chamber (II), (I), terminate in dividing plate (6), and combine with dividing plate (6); Described exhausting silencer pipe is made up of diameter, two exhausting silencer pipes (9) and (11) that length is different, the closed end of two exhausting silencer pipes passes the through hole that processes on the rear end cover (8) respectively and enters chamber (IV), terminate in dividing plate (7), and combine with dividing plate (7), in two exhausting silencer pipes big, the length of diameter the opening end of a short short and thick exhausting silencer pipe (9) be provided with gas exhausting valve (10); In chamber (II), (I), (III), be provided with the middle hush tube (5) that is processed with a plurality of pores at least one root canal wall in the mode that is parallel to intake noise reduction pipe (4) axis, the opening end of this centre hush tube is positioned at chamber (II), its closed end is positioned at chamber (III), and combines with dividing plate (7).
2, exhaust silencer for internal-combustion engine according to claim 1, it is characterized in that: be provided with middle hush tube (5) and (13) that are processed with a plurality of pores on two root canal walls in the mode that is parallel to intake noise reduction pipe (4) axis in chamber (II), (I), (III), the area sum of two middle hush tube cross sections is greater than the cross sectional area of intake noise reduction pipe; Described pore is all processed and is being arranged on the tube wall section of chamber III, and the area sum of a plurality of pores is greater than middle hush tube cross sectional area.
3, exhaust silencer for internal-combustion engine according to claim 1 is characterized in that: described gas exhausting valve (10) is a diaphragm type automatic vent control valve; Elongated exhausting silencer pipe (11) tube chamber that the epicoele (18) of this diaphragm type automatic vent control valve is less with diameter by pipeline (20), length is long is connected.
4, exhaust silencer for internal-combustion engine according to claim 1, it is characterized in that: described intake noise reduction pipe (4) is arranged in pore quantity on the tube wall section of chamber (I) more than the stomatal number that is arranged on chamber (II) the tube wall section, and on two sections tube wall sections the area sum of pore greater than intake noise reduction pipe (4) cross sectional area.
5, exhaust silencer for internal-combustion engine according to claim 1 is characterized in that: the area sum of a plurality of pores that process on the described exhausting silencer tube wall is greater than exhausting silencer pipe cross sectional area.
6, according to claim 1 or described exhaust silencer for internal-combustion engine, it is characterized in that: described chamber (I)＞chamber (IV)＞chamber (III)＞chamber (II).
7, according to claim 1 or described exhaust silencer for internal-combustion engine, it is characterized in that: described dividing plate (3) is gone up area sum, the dividing plate (7) of set pore (14) and is gone up the area sum of set pore (12) all greater than intake noise reduction pipe (4) cross sectional area.
8, according to claim 1 or described exhaust silencer for internal-combustion engine, it is characterized in that: in two exhausting silencer pipes less, the length of diameter the cross sectional area of long elongated exhausting silencer pipe (11) less than the cross sectional area of intake noise reduction pipe (4); And short and thick exhausting silencer pipe (9) cross sectional area that diameter is big, length is short is greater than the cross sectional area of intake noise reduction pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620032170 CN2934587Y (en) | 2006-06-02 | 2006-06-02 | Exhaust silencing apparatus for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620032170 CN2934587Y (en) | 2006-06-02 | 2006-06-02 | Exhaust silencing apparatus for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2934587Y true CN2934587Y (en) | 2007-08-15 |
Family
ID=38351277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620032170 Expired - Fee Related CN2934587Y (en) | 2006-06-02 | 2006-06-02 | Exhaust silencing apparatus for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2934587Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594978A (en) * | 2015-01-29 | 2015-05-06 | 合肥汇凌汽车零部件有限公司 | Silencer matched with turbocharged engine |
-
2006
- 2006-06-02 CN CN 200620032170 patent/CN2934587Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594978A (en) * | 2015-01-29 | 2015-05-06 | 合肥汇凌汽车零部件有限公司 | Silencer matched with turbocharged engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2921306Y (en) | Impedance composite noise silencer | |
| CN2934587Y (en) | Exhaust silencing apparatus for internal combustion engine | |
| CN110030061A (en) | A kind of racing car exhaust muffling device | |
| CN1858412A (en) | Internal combustion engine exhaust silencer with variable exhaust pipe cross section | |
| CN203835496U (en) | Silencer | |
| CN2934588Y (en) | Exhaust tube section area variable exhausting and silencing apparatus for internal combustion engine | |
| CN2921305Y (en) | Internal combustion engine air exhaust silencer capable of regulating exhaust pipe section area | |
| CN215860395U (en) | Semi-active control exhaust silencer for automobile | |
| CN2605384Y (en) | Exhaust silencer for internal combustion engine | |
| CN201162565Y (en) | Heat availability silencer | |
| CN2871858Y (en) | Silencer for automobile | |
| CN1858411A (en) | Exhaust silencer of internal combustion engine | |
| CN200958411Y (en) | Engine silencer of vehicle | |
| CN216077267U (en) | Silencer structure | |
| CN2818808Y (en) | Exhaust silencer of IC engine of heavy truck | |
| CN2088167U (en) | Airstream muffler | |
| CN215292627U (en) | Double-channel low-resistance silencer | |
| CN209011923U (en) | Muffler | |
| CN2816368Y (en) | Gasoline engine secondary silencer for car | |
| CN201621042U (en) | Compressor muffle | |
| CN109057931B (en) | Motorcycle, exhaust device and pressure relief structure of exhaust device | |
| CN217421325U (en) | Large-displacement silencer | |
| CN201448140U (en) | Motorcycle silencer | |
| CN2611608Y (en) | Novel exhaust silencer of I.C. engine | |
| CN2533270Y (en) | Silencer of engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070815 |