CN202091059U - Waste gas cooling module used in internal combustion engine - Google Patents
Waste gas cooling module used in internal combustion engine Download PDFInfo
- Publication number
- CN202091059U CN202091059U CN2011201046930U CN201120104693U CN202091059U CN 202091059 U CN202091059 U CN 202091059U CN 2011201046930 U CN2011201046930 U CN 2011201046930U CN 201120104693 U CN201120104693 U CN 201120104693U CN 202091059 U CN202091059 U CN 202091059U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- waste gas
- coolant
- exhaust
- valve
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1607—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with particular pattern of flow of the heat exchange media, e.g. change of flow direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/72—Housings
- F02M26/73—Housings with means for heating or cooling the EGR valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Exhaust Silencers (AREA)
Abstract
The utility model relates to a waste gas cooling module used in an internal combustion engine. The waste gas cooling module comprises a valve (10) and a waste gas heat exchanger (6), wherein the valve (10) comprises a valve casing (2), valve bodies (12 and 14) and an actuator (28); the valve bodies (12 and 14) used for controlling waste gas circulation passages (16 and 18) are arranged in the valve casing (2); the actuator (28) is used for controlling the valve bodies (12 and 14); the waste gas heat exchanger (6) is connected with the valve casing (2); and at least one coolant passage (34) connected with fluid in a coolant passage (44) of the waste gas heat exchanger (6) is arranged in the valve casing (2). Usually, the valve casing arranged in front of the waste gas heat exchanger breaks down during coolant delivery. To solve the problem, a coolant inlet (50) and a coolant outlet (56) are formed on the waste gas heat exchanger (6); a coolant inlet (46) of the valve casing (2) is connected with fluid in the coolant inlet (50) of the waste gas heat exchanger (6) through a first connecting passage (48); and a coolant outlet (52) of the valve casing (2) is connected with the coolant outlet (56) through a second connecting passage (54).
Description
Technical field
The utility model relates to a kind of waste gas refrigerating module that is used for internal-combustion engine, it has valve and exhaust-heat exchanger, this valve has valve chest, be arranged in the valve body of the control exhaust gas recirculation passage in this valve chest and be used to handle the actuator of valve body, this exhaust-heat exchanger is connected with valve chest, and at least one coolant channel that is connected with the coolant channel fluid of exhaust-heat exchanger wherein is set in valve chest.
Background technique
Known this waste gas refrigerating module.In order to reduce harmful matter, exhaust flow controllably flows to gaseous effluent.Be connected the interface that forms between each equipment in order to reduce the past by flexible pipe or pipeline, developed by simple flange and connect the affixed each other module in water conservancy diversion ground.Therefore, for example the waste gas circulation valve housing directly is connected with heat exchanger.This also has this advantage, promptly be arranged in before the heat exchanger, the waste gas circulating valve that just is arranged in the thermal region of waste gas circulation conduit can be connected with the freezing mixture cover fluid of heat exchanger, so that prevent that by heat-proof device actuator is owing to hot waste gas and overheated.
For example by the known this module of DE 10321637A1.The waste gas circulating valve of combination is connected with gaseous effluent by flange with by-pass valve, can walk around this gaseous effluent by a bypass channel that is arranged in equally in the heat exchanger shell.Heat exchanger has inner housing and surrounds the frame of inner housing, forms the freezing mixture cover between two housings.The freezing mixture cover by flange be arranged on valve chest in and the heat insulation coolant channel of passage of actuator and circulation waste gas is connected.Be provided with coolant flow inlet on the shell of heat exchanger, freezing mixture flows in the freezing mixture cover via this inflow entrance.Freezing mixture flows out from the freezing mixture cover and enters in the coolant channel of valve chest, is provided with a freezing mixture outflow opening on valve chest, and freezing mixture flows out via this outflow opening.
Decide with respect to the location of the coolant circuit in the engine compartment on heat exchanger and valve, may need coolant flow inlet and freezing mixture outflow opening all are arranged on the housing of heat exchanger.Yet by in being connected of flange, the coolant channel in the valve chest lacks circulation at coolant channel known, valve chest and freezing mixture cover.Coolant channel forms stagnant water chamber (Totwasserraum) in this design proposal.
The model utility content
Therefore, technical problem to be solved in the utility model is also to guarantee the circulation of the coolant channel that is connected with coolant channel heat exchanger valve chest when coolant flow inlet and outflow opening are arranged on the heat exchanger.At this, should reduce extra parts and valve as far as possible and should use cheap material.
This technical problem solves by a kind of waste gas refrigerating module that is used for internal-combustion engine, this waste gas refrigerating module has valve and exhaust-heat exchanger, this valve has valve chest, be arranged in the valve body of the control exhaust gas recirculation passage in this valve chest and be used to handle the actuator of valve body, this exhaust-heat exchanger is connected with valve chest, and the coolant channel that at least one is connected with the coolant channel fluid of exhaust-heat exchanger wherein is set in valve chest.
Have coolant flow inlet and freezing mixture outflow opening by heat exchanger, wherein, the coolant entrance of valve chest is connected with the coolant flow inlet fluid of exhaust-heat exchanger by first connecting passage and the coolant outlet of valve chest is connected with the freezing mixture outflow opening by second connecting passage, the pressure reduction of coolant circuit is passed on the entrance and exit of valve chest, therefore guarantees freezing mixture flowing in the coolant channel of valve chest.Because guaranteed to flow, valve can use cheap material, because more heats are derived.
Preferred first connecting passage is connected with coolant flow inlet by the coolant channel of exhaust-heat exchanger, and wherein, first connecting passage enters the feeding mouth of coolant channel and compares the more close coolant flow inlet of freezing mixture outflow opening.Thus, the amount of coolant of the freezing mixture cover of introducing heat exchanger is kept and can be conditioned.
In a kind of selectable preferred design, first connecting passage feeds in the coolant flow inlet of exhaust-heat exchanger.Therefore, the temperature levels on the heat exchanger is the same with temperature levels on the valve chest.Therefore the whole pressure reduction that are present on the heat exchanger also can be used for making the valve chest circulation.
In a kind of improved design proposal, second connecting passage feeds in the freezing mixture outflow opening of exhaust-heat exchanger, to avoid owing to the freezing mixture cover, form eddy current from two side inflows and the flow resistance that increases thus.
Advantageously, the feeding mouth of first connecting passage be arranged in exhaust-heat exchanger with coolant flow inlet and the opposed side of outflow opening on, avoid the abundant circulation that between the outlet of the inlet of first connecting passage and second connecting passage, forms short-circuit flow and therefore guarantee coolant channel in the valve chest thus.
In addition advantageously, the coolant entrance of valve chest be arranged in exhaust-heat exchanger with coolant flow inlet and the opposed side of outflow opening on.Can in the exhaust-heat exchanger that drives by convection type, connecting passage be designed to the pipeline of straight line thus.
Expend for therefore the interface of avoiding adding also reduces to assemble with punching, connecting passage is arranged in the shell of exhaust-heat exchanger.This shell especially can be made in sand casting process.
Preferably, the coolant entrance of exhaust-heat exchanger and valve chest and connecting passage and valve chest and outlet are lined with in the centre under the situation of Sealing and are connected by flange.Form simple between the housing parts of two guiding freezing mixtures thus and the Placement of sealing.
Therefore created a kind of refrigerating module, wherein, the circulation of the coolant channel in the valve chest that when entrance and exit is arranged on the shell of refrigerating module, also can guarantee to connect.This module can assemble and make simply.This valve can directly be cooled off in having the zone of maximum heat load reliably, and is overheated to avoid actuator.The interface quantity that exists is reduced to minimum.
Description of drawings
Expression and following explanation are by a kind of form of implementation of waste gas refrigerating module of the present utility model in the accompanying drawings.
Fig. 1 is the side view by waste gas refrigerating module of the present utility model,
Fig. 2 is the cross sectional side views by waste gas refrigerating module rotation 90 degree of the present utility model of Fig. 1.
Embodiment
Shown waste gas refrigerating module is made of three housing parts, and wherein, first housing parts is that valve chest 2, the second valve members are that shell 4, the three housing parts of exhaust-heat exchanger 6 are inner casings 8 of exhaust-heat exchanger 6.
Valve chest 2 is housings that waste gas circulating valve 10 forms passage, it has two waste gas circulation valves 12,14 as valve body in this form of implementation, these two waste gas circulation valves 12,14 are controlled a flow cross respectively, wherein, each flow cross is attached troops to a unit in an exhaust steam passage 16,18.First exhaust steam passage 16 is separated by the dividing plate 20 and second exhaust steam passage 18 that design in valve chest 2.This dividing plate 20 extend to valve chest 2 from the inlet 22 of waste gas refrigerating module with the partially outlets 24 of layout of inlet 22 with turning 90 degrees, so the exhaust flow of valve chest 2 inside also turn 90 degrees partially.Inlet 22 is designed to flange, and this refrigerating module can directly be connected with unshowned exhaust manifold or engine cylinder-body flange by this flange.
Waste gas circulation valve 12,14 is arranged on the common shaft 26, and this common shaft 26 is bearing in the valve chest 2 and can rotates by being coupled bar 30 by motor actuation device 28.Axle 26 be reset in the outside of valve chest 2 spring 32 around, waste gas circulation valve 12,14 rotates to by this Returnning spring 32 in the position of two exhaust steam passages 16,18 of this waste gas circulation valve sealing when actuator 28 is malfunctioning.
In valve chest 2, be additionally provided with coolant channel 34, by the big valve chest 2 of these coolant channel 34 heat of cooling loads and especially protect actuator 28 overheated to prevent it.Because have this coolant channel 34, valve chest 2 has the function of precooler.Although but still in exhaust path in order to turn 90 degrees partially, just in passage 16,18 zones, obtain long as far as possible cooling path, on valve chest 2, has coolant hose 36, this coolant hose 36 makes the freezing mixture can be from exporting an effluent of 24 to waste gas circulation valve 12,14 opposed sides and flow back to outlet 24 again, and needn't be expensively in valve chest 2 itself this turning to of formation.Therefore between the passage 16,18 of actuator 28 and exhaust gas routing since therebetween the cooling channel 34 of layout form thermal-protective coating.This cooling channel 34 is arranged like this, makes and has guaranteed also that except heat insulation cooling path can as far as possible directly be connected on the exhaust steam passage 16,18, so that reduce thermal load at the position that generates thermal load.
Valve chest 2 is lined with in the centre by flange connecting apparatus 38 under the situation of unshowned Sealing and is fixed on the exhaust-heat exchanger 6.As stating, in the shell 4 of exhaust-heat exchanger 6, be provided with inner casing 8, be provided with dividing plate 40 equally in this inner casing 8, this dividing plate 40 is arranged on the extending part of dividing plate 20 of valve chest 2, and therefore two exhaust steam passages 16,18 also continue to separate in heat exchanger 6.Inner casing 8 has widening portion 42 at its axial end portion, and the external diameter of this widening portion 42 is equivalent to the internal diameter of shell 4, limits the freezing mixture cover that forms cooling channel 44 under the situation of radial seal hermetically so that be lined with in the centre between inner casing 8 and shell 4.
Connect also by flange and between the coolant channel 44 of the coolant channel 34 of valve chest 2 and heat exchanger 6, to form fluid and connect.
For freezing mixture is really flowed in valve chest 2, by the utility model thus mode utilize the pressure difference of internal-combustion engine cooling circuit, promptly, the inlet 46 that freezing mixture enters valve chest 2 is connected with near first connecting passage 48 that feeds in the coolant channel 44 coolant flow inlet 50 of coolant channel 44, and the outlet 52 of freezing mixture outflow valve chest 2 is connected with the freezing mixture outflow opening 56 of the coolant channel 44 of exhaust-heat exchanger 6 by second connecting passage 54.Article two, connecting passage 48,54 designs independently in the shell 4 of heat exchanger 6 and with respect to the medial axis of heat exchanger 6 and arranges opposed to each other.Thus, further prevent from short-circuit flow to occur between two connecting passages 48,54.
Between the coolant channel 34 of freezing mixture outflow opening 56 and valve chest 2, exist direct fluid to connect, connect and between coolant flow inlet 50 and coolant channel 34, set up fluid by freezing mixture cover 44.Therefore, connecting passage 48,54 can design linearly, so they can directly be made in sand casting process and needn't use extra parts.
The freezing mixture that flows into freezing mixture cover 44 through inflow entrance 50 flows around inner casing 8, wherein, portion cooling agent is sucked in first connecting passage 48 via feeding mouth 58 from freezing mixture cover 44 by the pressure reduction that the pumping power with the coolant pump that is connected between two connecting passages 48,54 conforms to.This freezing mixture rises from here to flow in the valve chests 2 and through coolant channel 34 and coolant hose 36 via coolant entrance 46 and flows to coolant outlet 52, and continues directly to flow to freezing mixture outflow opening 56 via connecting passage 54.Therefore, roughly the same in the coolant flow inlet 50 and the driving pressure difference between the outflow opening 56 of driving pressure difference between two connecting passages and heat exchanger 6.
Guarantee the circulation of freezing mixture in the valve chest 2 like this in simple mode.This is used to the cooling effectiveness of protecting actuator 28 not to be subjected to too high thermal load and to have improved whole module on the whole.
Also can realize reducing extraly harmful matter thus by this module, promptly, inner or in the inflow entrance of coolant channel 44 or outflow opening, a freezing mixture valve is set at coolant channel 44, can interrupt the flow cross of coolant channel 34,44 by this freezing mixture valve.Can shorten the hot machine stage that internal-combustion engine produces most of harmful matters thus, thereby because circulating coolant does not make waste gas draw to be back to port plate to a great extent uncolledly.
Will be clear that in the protection domain of independent claims, can design and compare different flexible programs with described form of implementation.Especially the connection between connecting duct and coolant flow inlet and the outflow opening needn't be undertaken by the mode of having stated fully.Can be by the coolant channel of heat exchanger or directly utilize described pressure reduction by inflow entrance and outflow opening.The manufacturing of housing parts and structural design also can be changed on applicable cases with deciding.For example poppet valve also can be used as waste gas circulating valve.Also method is cooled off by-pass valve in the same manner.
Claims (8)
1. waste gas refrigerating module that is used for internal-combustion engine, it has valve (10) and exhaust-heat exchanger (6), described valve (10) has valve chest (2), be arranged in the control exhaust gas recirculation passage (16 in the described valve chest (2), 18) valve body (12,14) and be used to handle described valve body (12,14) actuator (28), described exhaust-heat exchanger (6) is connected with described valve chest (2), wherein, at least one coolant channel (34) that is connected with coolant channel (44) fluid of described exhaust-heat exchanger (6) is set in described valve chest (2), it is characterized in that, described heat exchanger (6) has coolant flow inlet (50) and freezing mixture outflow opening (56), wherein, the coolant entrance (46) of described valve chest (2) is connected with coolant flow inlet (50) fluid of described exhaust-heat exchanger (6) by first connecting passage (48) and the coolant outlet (52) of described valve chest (2) passes through second connecting passage (54) and is connected with described freezing mixture outflow opening (56).
2. the waste gas refrigerating module that is used for internal-combustion engine as claimed in claim 1, it is characterized in that, described first connecting passage (48) is connected with described coolant flow inlet (50) by the coolant channel (44) of described exhaust-heat exchanger (6), wherein, described first connecting passage (48) feeds the feeding mouth (58) of described coolant channel (44) with respect to the more close described coolant flow inlet of described freezing mixture outflow opening (56) (50).
3. the waste gas refrigerating module that is used for internal-combustion engine as claimed in claim 1 is characterized in that, described first connecting passage (48) feeds in the coolant flow inlet (50) of described exhaust-heat exchanger (6).
4. the waste gas refrigerating module that is used for internal-combustion engine as claimed in claim 1 is characterized in that, described second connecting passage (54) feeds in the freezing mixture outflow opening (56) of described exhaust-heat exchanger (6).
5. the waste gas refrigerating module that is used for internal-combustion engine as claimed in claim 2, it is characterized in that, the feeding mouth (58) of described first connecting passage (48) be arranged in described exhaust-heat exchanger (6) with described coolant flow inlet (50) and the opposed side of freezing mixture outflow opening (56) on.
6. the waste gas refrigerating module that is used for internal-combustion engine as claimed in claim 1, it is characterized in that, the coolant entrance (46) of described valve chest (2) be arranged in described exhaust-heat exchanger (6) with described coolant flow inlet (50) and the opposed side of freezing mixture outflow opening (56) on.
7. the waste gas refrigerating module that is used for internal-combustion engine as claimed in claim 1 is characterized in that, described connecting passage (48,54) is arranged in the shell (4) of described exhaust-heat exchanger (6).
8. the waste gas refrigerating module that is used for internal-combustion engine as claimed in claim 1, it is characterized in that the coolant entrance (46) of described exhaust-heat exchanger (6) and described valve chest (2) and described connecting passage (48,54) and described valve chest (2) and coolant outlet (52) are lined with in the centre under the situation of Sealing and are connected by flange.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010014842A DE102010014842B3 (en) | 2010-04-13 | 2010-04-13 | Exhaust gas cooling module for an internal combustion engine |
| DE102010014842.3 | 2010-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202091059U true CN202091059U (en) | 2011-12-28 |
Family
ID=43969442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201046930U Expired - Fee Related CN202091059U (en) | 2010-04-13 | 2011-04-12 | Waste gas cooling module used in internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2378104B1 (en) |
| CN (1) | CN202091059U (en) |
| DE (1) | DE102010014842B3 (en) |
| ES (1) | ES2386121T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104169560A (en) * | 2012-04-18 | 2014-11-26 | 皮尔伯格有限责任公司 | Exhaust flap device for an internal combustion engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015006100A1 (en) * | 2015-05-09 | 2016-11-10 | Motorenfabrik Hatz Gmbh & Co Kg | Device and method for exhaust gas recirculation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1238193B1 (en) * | 1999-12-14 | 2007-05-23 | Cooper-Standard Automotive Inc. | Integrated egr valve and cooler |
| HU2488U (en) * | 2002-05-15 | 2003-03-28 | Behr Gmbh & Co Kg | Apparatus for controlling of recirculated exhaust gases in internal combustion engines |
| JP2007009724A (en) * | 2005-06-28 | 2007-01-18 | Denso Corp | Heat exchange device for exhaust gas |
| WO2007098854A1 (en) * | 2006-02-24 | 2007-09-07 | Behr Gmbh & Co. Kg | Valve for regulating an exhaust gas flow of an internal combustion engine, heat exchanger for exhaust gas cooling, system having at least one valve and having at least one heat exchanger |
| DE102006023852A1 (en) * | 2006-05-19 | 2007-11-22 | Mahle International Gmbh | Valve arrangement for an exhaust gas recirculation device |
| ES2299405B1 (en) * | 2007-10-09 | 2009-09-11 | Dayco Ensa S.L. | INTEGRATED EGR / REFRIGERATION MODULE FOR AN INTERNAL COMBUSTION ENGINE. |
-
2010
- 2010-04-13 DE DE102010014842A patent/DE102010014842B3/en active Active
-
2011
- 2011-03-23 EP EP11159365A patent/EP2378104B1/en active Active
- 2011-03-23 ES ES11159365T patent/ES2386121T3/en active Active
- 2011-04-12 CN CN2011201046930U patent/CN202091059U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104169560A (en) * | 2012-04-18 | 2014-11-26 | 皮尔伯格有限责任公司 | Exhaust flap device for an internal combustion engine |
| US9464602B2 (en) | 2012-04-18 | 2016-10-11 | Pierburg Gmbh | Exhaust flap device for an internal combustion engine |
| CN104169560B (en) * | 2012-04-18 | 2017-12-22 | 皮尔伯格有限责任公司 | Waste gas valve gear for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2378104A1 (en) | 2011-10-19 |
| ES2386121T3 (en) | 2012-08-09 |
| DE102010014842B3 (en) | 2011-09-22 |
| DE102010014842A1 (en) | 2011-10-13 |
| EP2378104B1 (en) | 2012-05-23 |
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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: 20111228 Termination date: 20170412 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |