CN202228190U - Air throttle valve device - Google Patents
Air throttle valve device Download PDFInfo
- Publication number
- CN202228190U CN202228190U CN2011203157478U CN201120315747U CN202228190U CN 202228190 U CN202228190 U CN 202228190U CN 2011203157478 U CN2011203157478 U CN 2011203157478U CN 201120315747 U CN201120315747 U CN 201120315747U CN 202228190 U CN202228190 U CN 202228190U
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- Prior art keywords
- air throttle
- throttle
- aperture
- spring
- motor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The utility model provides an air throttle valve device (100), which comprises an air throttle valve body (18), a motor (14), a first spring (11), a second spring (12), air throttle valve sensors (16 and 17) and an air throttle valve control unit (3). The control unit (3) can stop electricity for the motor (14) to diagnose the first spring (11) in fuel cutoff mode and under the situation that opening degree of the air throttle valve is higher than a specified value of the opening degree. Under the situation that the opening degree of the air throttle valve is not higher than the specified value of the opening degree, the air throttle valve (18) is driven by the motor (14) till the opening degree of the air throttle valve is higher than the specified value of the opening degree, and electricity for the motor (14) is stopped to diagnose the fist spring (11). Reliability and safety of the air throttle valve device (100) can be further improved.
Description
Technical field
The utility model relates to a kind of automobile and uses damper assemblies, particularly a kind of damper assemblies that can comprehensive diagnostic predeterminated position return mechanism.
Background technique
In the prior art, detect the amount of entering into of accelerator pedal, set air throttle target aperture corresponding to this detection limit through accelerator pedal sensor, known by the electronic type damper assemblies of motoring control throttle-valve body.According to this electronic type damper assemblies, control throttle-valve body and carry out the adjustment of engine output, thus improve the runnability of engine.
In addition; In order to ensure the Security of damper assemblies, implement various diagnosis, diagnostic result is judged to be under the unusual situation; Motor power is closed; Through the predeterminated position return mechanism air throttle aperture is maintained on the preset aperture that mechanicalness is set in advance, go, to improve the Security of automobile thereby keep MIN keeping out of the way.Here, keeping out of the way goes is meant at vehicle and breaks down and ECU is detected under the unusual situation, can avoid dangerous and guarantees that vehicle has MIN driveability, thereby can make near the maintenance station of automobile safety arriving etc.
In the electronic type damper assemblies, there are various motions (for example, japanese kokai publication hei 11-229943 communique, japanese kokai publication hei 11-257103 communique etc.) in the diagnostic techniques of predeterminated position return mechanism here.
In the technology of being put down in writing in the japanese kokai publication hei 11-229943 communique (patent documentation 1); Close at key under the state that (Key OFF) rear engine stops; Through the motoring throttle-valve body until the air throttle aperture become the diagnosis with the target aperture till; Stop motor power afterwards, detect the restoring force air throttle aperture that relies on spring (predeterminated position return mechanism) at the appointed time and whether can diagnose thereby carry out spring across prescribed.
In the technology of being put down in writing in the japanese kokai publication hei 11-257103 communique (patent documentation 2); Open (Key On) back and engine at key also under the state in revolution; Situation in the deceleration fuel cutoff in the vehicle driving is captured; The air throttle aperture be in preset aperture near the time and than preset aperture more near the situation of opening side under, the diagnosis of enforcement spring (predeterminated position return mechanism).
Yet, in the patent documentation 1, only can carry out throttle-valve body is back to the spring of preset aperture from a side of more closing than preset aperture diagnosis.But can not carry out throttle-valve body is back to the spring of preset aperture from a side of more opening than preset aperture diagnosis.
In the patent documentation 2,, carry out the diagnosis of spring from a side of more opening than preset aperture though put down in writing in the deceleration fuel cutoff pattern.But it is actually by motor throttle-valve body is urged near the preset aperture, and is not to be returned preset aperture by the effect of spring.Therefore, can not judge well whether spring can proper function.
Patent documentation 1: japanese kokai publication hei 11-229943 communique
Patent documentation 2: japanese kokai publication hei 11-257103 communique
The model utility content
In order to overcome the defective of above-mentioned existing technology; The inventor of the utility model considers; If in vehicle traveling process, and do not influencing under the driver-operated situation, the air throttle aperture is being forced to be urged to exceed preset more than the aperture specified value; Carry out the diagnosis of spring afterwards, then can address the above problem.
The purpose of the utility model is to provide a kind of damper assemblies, possesses: throttle-valve body, and the sectional area of the air suction way of engine is changed, thus the suction air quantity of regulating engine; Motor drives said throttle-valve body and in said air suction way, rotates; First spring, with said throttle-valve body from opening the predeterminated position deflection of a side direction corresponding to preset aperture; Second spring, with said throttle-valve body from closing the said predeterminated position deflection of a side direction; The air throttle sensor is used to detect the air throttle aperture; And air throttle control unit; Said air throttle control unit is constituted as, and in the fuel cut-off pattern of said engine, exceeds under the situation more than the specified value in the said preset aperture of said air throttle opening ratio; Stop the energising of said motor, thereby carry out the diagnosis of said first spring; Exceed under the situation more than the said specified value unlike said preset aperture in said air throttle aperture; Through the said throttle-valve body of said motoring until said air throttle aperture reach exceed specified value than said preset aperture after; Stop the energising of said motor, thereby carry out the diagnosis of said first spring.
In addition, in the damper assemblies of above-mentioned the utility model, said air throttle control unit is constituted as, and in the high engine speed fuel cut-off pattern of said engine, stops the energising of said motor, thereby carries out the diagnosis of said first spring.
In addition, in the damper assemblies of above-mentioned the utility model, said air throttle control unit is constituted as, and in the high speed of a motor vehicle fuel cut-off pattern of said engine, stops the energising of said motor, thereby carries out the diagnosis of said first spring.
By technique scheme, the advantage that has and the beneficial effect of the utility model are:
Under the situation that does not influence driving, can implement to carry out the diagnosis of predeterminated position return mechanism, can further improve the reliability and the Security of damper assemblies from a side of more opening than preset aperture.
Description of drawings
Fig. 1 is the structural drawing of the damper assemblies 100 of expression the utility model.
Fig. 2 is the figure of all structures that expression comprises the engine controller 1 of air throttle control unit 3.
Fig. 3 is used to explain that key closes the figure of diagnosis of action and the return spring 12 of the damper assemblies 100 after (Key OFF).
Fig. 4 is the action specification figure under the various vehicle speed condition in the deceleration fuel cutoff pattern.
Fig. 5 is the action specification figure under the low vehicle speed condition in the deceleration fuel cutoff pattern of the utility model.
Fig. 6 is the action specification figure in the high engine speed fuel cut-off pattern of the utility model.
Fig. 7 is the action specification figure in the high speed of a motor vehicle fuel cut-off pattern of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is explained in more detail.
Fig. 1 is the structural drawing of the damper assemblies 100 of expression the utility model.This damper assemblies 100 possesses: throttle-valve body 18, and the sectional area of the air suction way of engine is changed, thus the suction air quantity of regulating engine; Motor 14 drives throttle-valve body 18 and in air suction way, rotates; Acquiescence spring (first spring) 11, with throttle-valve body 18 from opening the predeterminated position deflection of a side direction corresponding to preset aperture; Return spring (second spring) 12, with throttle-valve body 18 from closing a side predeterminated position deflection; Air throttle sensor 16,17 is used to detect the air throttle aperture; And air throttle control unit 3.In addition, motor 24 rotates throttle-valve body 18 through transmission device 15.
Fig. 2 representes the figure of all structures of the engine controller 1 of air throttle control unit 3.The engine controller 1 that comprises this air throttle control unit 3 possesses: input I/F (A/D converter) 9, engine control calculation part 2 and air throttle control unit 3.A/D converter 9 is obtained GES and engine speed signal from speed of a motor vehicle detection unit 22 and engine winding number detection unit 23.
In the accelerator pedal portion 6, dispose accelerator pedal 24 and 2 accelerator pedal sensor 25,26.Driver's intention is represented that by the amount of entering into (the accelerator pedal amount of entering into) of accelerator pedal 24 this amount of entering into is detected by accelerator pedal sensor 25,26 as entering into angle.In order to improve the reliability of accelerated operation, accelerator pedal sensor 25,26 can be constituted as the structure of multiple type.In this mode of execution, be the structure of two heavy types as stated.Afterwards, A/D converter 9 reads the accelerator pedal amount of the entering into signal of accelerator pedal portion 6, and reads air throttle aperture testing signal from air throttle sensor 16,17.
Air throttle portion 7 comprises throttle-valve body 18, drives motor 14, transmission device 15 and the predeterminated position return mechanism 13 of these throttle-valve body 18 rotations, and disposes the air throttle sensor 16,17 of multiple type.In this mode of execution, be the structure of double type.Air throttle portion 7 and air throttle control unit 3 have constituted the damper assemblies 100 of this mode of execution.
Predeterminated position return mechanism 13 possesses and is used for from opening that side is returned the acquiescence spring 11 of predeterminated position and from closing the return spring 12 that side is returned predeterminated position.
Engine control calculation part 2 reads the testing signal of accelerator pedal sensor 25,26, and definite accelerator pedal aperture.Afterwards; According to the aperture desired value corresponding to the throttle-valve body 18 of the amount of said accelerator pedal aperture of having stored; And the target aperture (desired air throttle aperture) of setting throttle-valve body 18, and should desired air throttle aperture export air throttle control unit 3 to.
This air throttle control unit 3 possesses air throttle control calculation part 4 and motor drive circuit portion 5.Air throttle control calculation part 4 is carried out the drive controlling of motor 14, and said 2 air throttle sensors 16,17 is carried out fault diagnosis based on the signal from A/D transducer 9.Motor drive circuit portion 5 is for example supplied power via relay 19 by storage battery B.The testing signal of air throttle sensor 16,17 is read by this air throttle control calculation part 4, unusual the having or not of diagnosis air throttle sensor 16,17.Have unusually, judge that air throttle sensor 16,17 breaks down.If normal words based on the signal of air throttle sensor 16,17, are confirmed the actual aperture of air throttle.The deviation that requires aperture and actual aperture based on throttle-valve body 18; Carry out feedback control (F/B) so that require aperture and the corresponding to mode of actual aperture; Calculate the driven quantity of the motor 14 that makes throttle-valve body 18 rotations; Export this driven quantity the motor 14 of air throttle portion 7 to via motor drive circuit portion 5, thereby via motor 14, transmission device 15 opens and closes throttle-valve body 18.
In addition, in this mode of execution, through engine control calculation part 2 or air throttle control unit 3 diagnosing abnormal states, under the situation that the indication motoring stops, protective function begins action.That is, keep predeterminated position return mechanism 13 (with reference to Fig. 2) in the air throttle portion 7.When unusual, this predeterminated position return mechanism 13 remains throttle-valve body 18 the preset aperture of initial setting.Should preset aperture be set to, guarantee to keep out of the way the engine air imbibed quantity of the scope of going and can stop safely through braking.
Yet; Security in the time of need guaranteeing that owing to predeterminated position return mechanism 13 damper assemblies 100 unusually; If therefore can improve the reliability of return spring that constitutes the predeterminated position return mechanism and the diagnosis of giving tacit consent to spring, the Security that then can further improve damper assemblies 100.
An example of the diagnostic method of return spring 12 is described below.When key was closed (Key OFF), the diagnosis of return spring 12 was implemented.Fig. 3 is used to explain that key closes the figure of diagnosis of action and the return spring 12 of the damper assemblies 100 after (Key OFF).The driver closes key (Key OFF), and then fuel and igniting stop, thereby engine stops.In order to remove the purpose of negative pressure in the sucking pipe etc., irrespectively temporarily drive throttle-valve body 18 envoy's air valve openings with accelerated operation and change when engine stops towards a side of opening.Secondly, in order to learn the full cut-off point voltage of throttle-valve body 18, and control throttle-valve body 18 to full close position, and study full cut-off point voltage.In the process of implementing the study of full cut-off point voltage, motor 14 drives with the mode that throttle-valve body 18 maintains full cut-off point.After the study of full cut-off point voltage finished, the driving of motor 14 stopped, and promptly cuts off the power supply of motor 14.Behind the power-off of motor 14, through the return force of return spring 12, throttle-valve body 18 is opened and becomes the preset aperture that sets.Whether air throttle control unit 3 diagnosis predeterminated position return mechanisms 13 normally are back to preset aperture scope with throttle-valve body 18, thereby finish whole diagnostic action.
According to the difference of the air displacement of engine, generally can keep out of the way and go and be about 12deg through the preset air throttle aperture that brake can emergency with the speed of a motor vehicle of 50km/h～80km/h.In addition, under this situation, the normal judgement aperture scope of preset aperture is that 12deg ± 5deg is more appropriate.
But predeterminated position return mechanism 13 is back to the preset aperture that sets through return spring 12 with acquiescence spring 11 actings in conjunction and with throttle-valve body 18.Though confirmed to make throttle-valve body 18 return preset aperture through the return force of return spring 12 tightly,, if can further confirm to give tacit consent to the effect of returning of spring 11, just can further improve reliability.To this; The diagnosis of the predeterminated position return mechanism 13 of this mode of execution; Not only has the action of returning through return spring 12 from a side of closing when closing (Key OFF) at key; Also have and open the action of returning through acquiescence spring 11 from a side of opening in (Key ON) at key, thereby further improve Security.
But, open at key in the revolution of (Key ON) and engine, throttle-valve body 18 is set at more than the preset aperture with the operation of accelerator pedal 24 irrelevant, it is breakneck that is to say the intention of violating the driver and the rotating speed of engine is risen.Usually, the setting of preset aperture is to go keeping out of the way when being assumed to be fault, and the promptly imaginary speed of a motor vehicle is the aperture that 50km/h～80km/h sets, and violating driver's intention in the process of moving and throttle-valve body 18 is opened to this aperture is irrational after all.
On the other hand; Though open (Key ON) back and can diagnose acquiescence spring 11 in the time before starter starting engine from key; But because fail to start before diagnosis finishes so till starting, will take a long time, is considered and can not be accepted from the angle of commodity.
So, open at key in the revolution of (Key ON) and engine and stop control, and throttle-valve body 18 is forced to be urged to opportunity of the position of more opening than preset aperture throttle-valve body 18, may be thought of as in the fuel cut-off pattern.In the fuel cut-off pattern, because the burning of engine stops, the words of throttle-valve body 18 actions are not influence also.
As stated, the diagnositc decision of preset aperture is that 12deg ± 5deg is more appropriate.Therefore, as exceeding the position more than the specified value than preset aperture, selecting this specified value is to be appropriate about 10deg.
The form of fuel cut-off has varied, for example when slowing down, has fuel cut-off.It decontrols accelerator pedal under the state of the speed of a motor vehicle with a certain degree, gently reduces the situation of the speed of a motor vehicle through the engine braking.Fig. 4 representes to explain the figure of this situation.After the condition of fuel cut-off is set up, thus the power-off diagnosis predeterminated position return mechanism 13 of motor 14 during the enforcement fuel cut-off.But the purpose of this diagnosis is to confirm through acquiescence spring 11 throttle-valve body 18 is returned from the position of more opening than preset aperture.
Under this situation, the driver loosens accelerator pedal after quickening, and makes pin leave accelerator pedal 24 then for deceleration.Fig. 4 representes the variation of engine speed, accelerator pedal aperture, the speed of a motor vehicle and air throttle aperture in this a series of actions.At this moment, motor 14 at first with throttle-valve body 18 to a side drive of opening, the stage that arrives the target aperture fine repeatable operation open side and close the driving of side, thereby keep certain aperture.Afterwards, in the stage that accelerator pedal 24 loosens, motor 14 is to closing side drive, thereby reduces the air throttle aperture apace.
Afterwards, fuel cut-off set up during in, in the position of more opening, close motor 14 power supplys, thereby implement to give tacit consent to the diagnosis of spring 11 than preset aperture.That is to say, under the state of situation 1, implement the diagnosis of acquiescence spring 11 in the drawings.
But as aforesaid, the speed of a motor vehicle is the situation of 70km/h if the setting of preset aperture is supposition, even then the speed of a motor vehicle is the state condition establishment of fuel cut-off down of 40km/h, will become the state of situation 2 in the diagram.
Under the state of situation 2, what diagnosed is not to be the acquiescence spring, and makes return spring, so under this situation, there is no need to implement diagnosis.
In addition, suppose in the 100km/h running process, leave when pin under the situation of accelerator pedal 24, when the condition of fuel cut-off is set up, the speed of a motor vehicle the chances are 70km/h, it is near preset aperture.This becomes the state of situation 3 in the diagram, under this situation, even become preset aperture behind motor 14 power-offs, can not think the acquiescence spring 11 diagnostic result OK.That is to say, its be not be effect through acquiescence spring 11 be back to preset aperture near, but because the driving force of motor 14 return.
Therefore, under the state shown in Figure 4, exceed under the situation more than the specified value, just can implement to close motor 14 and diagnosis acquiescence spring 11 in the preset aperture of air throttle opening ratio.If air throttle control unit 3 detects in the scope that actual aperture becomes preset aperture ± 5deg, judge that then diagnostic result is normal.
In addition; That kind as shown in Figure 5; Exceed under the situation more than the specified value unlike preset aperture in the air throttle aperture, through motor 14 drive throttle-valve bodies 18 until the air throttle aperture reach exceed specified value than preset aperture after, close the power supply of motor 14 and implement to give tacit consent to the diagnosis of spring 11.
The explanation of in the deceleration fuel cutoff pattern acquiescence spring 11 being diagnosed more than has been described.The situation of fuel cut-off has various, and Fig. 6 is the mode of execution of under the high engine speed fuel cut-off pattern of expression acquiescence spring 11 being diagnosed.High engine speed fuel cut-off pattern is meant that the rotating speed of engine rises under the above situation of specified value the fuel cut-off that carries out from the purpose of protection engine.In this case, because the air throttle aperture is in standard-sized sheet or near standard-sized sheet, after the condition of fuel cut-off is set up, can give tacit consent to the diagnosis of spring 11 at once.After the diagnosis of acquiescence spring 11 finishes, control usually corresponding to the mode of accelerator pedal aperture with the air throttle aperture.
Mode of execution when Fig. 7 representes high speed of a motor vehicle fuel cut-off pattern.High speed of a motor vehicle fuel cut-off pattern is meant that the speed of a motor vehicle rises under the above situation of the regulation speed of a motor vehicle fuel cut-off that carries out from the purpose of protection vehicle.Under this situation, because the air throttle aperture is in standard-sized sheet or near standard-sized sheet, after the condition of fuel cut-off is set up, can give tacit consent to the diagnosis of spring 11 at once.After the diagnosis of acquiescence spring 11 finishes, control usually corresponding to the mode of accelerator pedal aperture with the air throttle aperture.
Secondly; In mixed power (HEV) car; After switching to electric drive from engine driving, through motor 14 drive throttle-valve bodies 18 until the air throttle aperture reach exceed specified value than preset aperture after, close the power supply of motor 14 and implement to give tacit consent to the diagnosis of spring 11.
As switching to power-actuated diagnosis opportunity, if wait as long for may switch back engine driving once more, thus the chance of forfeiture diagnosis.Therefore as early as possible, for example about 5 seconds after, give tacit consent to the diagnosis of spring 11.
According to the damper assemblies 100 of the utility model, under the situation that does not influence driving, can implement to carry out the diagnosis of predeterminated position return mechanism from a side of more opening than preset aperture, can further improve the reliability and the Security of damper assemblies.
Though more than combine accompanying drawing and embodiment that the utility model is specified, be appreciated that above-mentioned explanation does not limit the utility model in any form.Those skilled in the art can be out of shape and change the utility model as required under the situation of connotation that does not depart from the utility model and scope, and these distortion and variation all fall in the scope of the utility model.
Claims (3)
1. a damper assemblies is characterized in that,
Possess:
Throttle-valve body changes the sectional area of the air suction way of engine, thus the suction air quantity of regulating engine;
Motor drives said throttle-valve body and in said air suction way, rotates;
First spring, with said throttle-valve body from opening the predeterminated position deflection of a side direction corresponding to preset aperture;
Second spring, with said throttle-valve body from closing the said predeterminated position deflection of a side direction;
The air throttle sensor is used to detect the air throttle aperture; And
The air throttle control unit,
Said air throttle control unit is constituted as, and in the fuel cut-off pattern of said engine, exceeds under the situation more than the specified value in the said preset aperture of said air throttle opening ratio, stops the energising of said motor, thereby carries out the diagnosis of said first spring; Exceed under the situation more than the said specified value unlike said preset aperture in said air throttle aperture; Through the said throttle-valve body of said motoring until said air throttle aperture reach exceed specified value than said preset aperture after; Stop the energising of said motor, thereby carry out the diagnosis of said first spring.
2. damper assemblies as claimed in claim 1 is characterized in that,
Said air throttle control unit is constituted as, and in the high engine speed fuel cut-off pattern of said engine, stops the energising of said motor, thereby carries out the diagnosis of said first spring.
3. damper assemblies as claimed in claim 1 is characterized in that,
Said air throttle control unit is constituted as, and in the high speed of a motor vehicle fuel cut-off pattern of said engine, stops the energising of said motor, thereby carries out the diagnosis of said first spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203157478U CN202228190U (en) | 2011-08-26 | 2011-08-26 | Air throttle valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203157478U CN202228190U (en) | 2011-08-26 | 2011-08-26 | Air throttle valve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202228190U true CN202228190U (en) | 2012-05-23 |
Family
ID=46078778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203157478U Expired - Fee Related CN202228190U (en) | 2011-08-26 | 2011-08-26 | Air throttle valve device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202228190U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953839A (en) * | 2011-08-26 | 2013-03-06 | 日立汽车部件（苏州）有限公司 | Air throttle device and control method thereof |
-
2011
- 2011-08-26 CN CN2011203157478U patent/CN202228190U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953839A (en) * | 2011-08-26 | 2013-03-06 | 日立汽车部件（苏州）有限公司 | Air throttle device and control method thereof |
| CN102953839B (en) * | 2011-08-26 | 2016-03-30 | 日立汽车系统(苏州）有限公司 | Damper assemblies and controlling method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HITACHI AUTOMOTIVE SYSTEMS (SUZHOU) CO., LTD. Free format text: FORMER NAME: HITACHI AUTOMOTIVE PARTS (SUZHOU) CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Suzhou City, Jiangsu province 215126 Industrial Park Suzhou Xinglong Street No. 255 Patentee after: Hitachi Automotive Systems (Suzhou) Co., Ltd. Address before: Suzhou City, Jiangsu province 215126 Industrial Park Suzhou Xinglong Street No. 255 Patentee before: Hitachi Automobile Parts (Suzhou) Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20150826 |
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| EXPY | Termination of patent right or utility model |