CN104847466B - Exhaust control valve inspection maintenance fixture - Google Patents
Exhaust control valve inspection maintenance fixture Download PDFInfo
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- CN104847466B CN104847466B CN201510296139.XA CN201510296139A CN104847466B CN 104847466 B CN104847466 B CN 104847466B CN 201510296139 A CN201510296139 A CN 201510296139A CN 104847466 B CN104847466 B CN 104847466B
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- control valve
- exhaust gas
- outlet
- gas control
- cylinder
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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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Abstract
The invention discloses an exhaust control valve inspection maintenance fixture which comprises a base. An operation shell is mounted on the base, a valve moving seat is arranged in the operation shell, a linkage control switch is arranged on the operation shell and is connected with a cleaning self-locking joint, the linkage control switch is further connected with an air intake cylinder and an air discharge cylinder, the air intake cylinder is connected with an air intake sealing head, and an air intake channel is communicated between the linkage control switch and the air intake sealing head and is connected with a pressure gauge; the air discharge cylinder is connected with an air discharge sealing head which is communicated with an air discharge channel, and the air discharge channel is connected with an air discharge gauge; a cleaning grove and a pressure reducer are arranged on the base, and the pressure reducer is correspondingly connected with the power source end of an exhaust control valve. By the arrangement, fault diagnosis and maintenance of the exhaust control valve can be completed, convenience in carry is achieved, and cost in use of the exhaust control valve is greatly lowered.
Description
Technical field
The present invention relates to a kind of exhaust gas control valve Measuring error equipment.
Background technology
In natural gas engine field, exhaust gas control valve receives ECU signals, by Duty ratio control, obtains target output pressure
Power, so as to control the boost pressure of supercharger, the boost pressure of supercharger determines the power performance of electromotor again.Gaseous mixture reaches
Pure less than 100%, if not changing combustion gas cleaner and air filter in time in addition, the impurity in gaseous mixture is often blocked up
Plug exhaust gas control valve internal screen or deafener, cause exhaust gas control valve cisco unity malfunction, cause the boost pressure of supercharger
Too high or deficiency, electromotor overpower or is short of power.Because gaseous mixture does not reach 100% degree of purity, and cannot accurately know
The time of combustion gas cleaner and air cleaner cartridge is changed, in gas engine field, this phenomenon of the failure is commonplace, and
Elapse over time, fault rate can more and more higher.If only change because exhaust gas control valve internal screen or deafener are blocked therefore
Barrier part, it appears excessively careless and cost can be caused to greatly increase.
The content of the invention
The technical problem to be solved is to provide a kind of fault diagnosis that can complete exhaust gas control valve with maintenance
Maintenance, is easy to carry, and substantially reduces the exhaust gas control valve Measuring error frock of the use cost of exhaust gas control valve.
To solve above-mentioned technical problem, the technical scheme is that：Exhaust gas control valve Measuring error frock, for detecting
Maintenance exhaust gas control valve, including base, are provided with work case on the base, valve body movement is provided with the work case
Seat, on the valve body Mobile base valve body placing trough is offered；The work case is provided with coordinated signals switch, the linkage control
The air inlet of system switch is connected with source of the gas, and the gas outlet of the coordinated signals switch is connected with cleaning self-locking joint, the linkage
The gas outlet of controlling switch be also associated be located at the work case in air inlet cylinder and outlet cylinder, the air inlet cylinder with
Coordinated signals passage is provided between the outlet cylinder, the piston rod of the air inlet cylinder is connected with and exhaust gas control valve air inlet
The inlet seal head of correspondence connection, between the coordinated signals switch and the inlet seal head inlet channel is communicated with, described
Air inlet cylinder is provided with and is connected with boost gauge with the inlet channel；The piston rod of the outlet cylinder is connected with and waste gas
The outlet seal head of control valve air gate correspondence connection, the outlet seal head is communicated with outlet passageway, on the outlet cylinder
It is provided with and is connected with outlet pressure table with the outlet passageway, the outlet passageway is connected with compression relief cock；The base is provided with
Rinse bath and decompressor, the connection corresponding with the power end of exhaust gas control valve of the power supply of the decompressor.
Used as preferred technical scheme, the fixed guide rail being communicated with the base inside and outside the work case is described
The valve body Mobile base is slidably connected on fixed guide rail.
Used as the improvement to above-mentioned technical proposal, the work case includes protective cover, sight is offered on the protective cover
Window is examined, the sidepiece of the protective cover is provided with side cover, and the side cover correspondence is positioned at the end of the fixed guide rail, the side
Mask also serves as Mobile base positioning baffle.
Used as the further improvement to above-mentioned technical proposal, the coordinated signals switch includes threeway mechanical switch, described
Threeway mechanical switch includes detection shelves, cleaning shelves and neutral.
Used as the further improvement to above-mentioned technical proposal, the inlet channel is axially opened in the air inlet cylinder
On piston rod, the source of the gas of the inlet channel isolates setting with the work source of the gas of the air inlet cylinder.
Used as especially further improving to above-mentioned technical proposal, the outlet passageway is axially opened in the outlet cylinder
Piston rod on, the source of the gas of the outlet passageway isolates setting with the work source of the gas of the outlet cylinder.
Used as especially further improving to above-mentioned technical proposal, the air inlet cylinder is vertically positioned at the work case
It is interior；The outlet cylinder is positioned horizontally in the work case.
As the bottom shape of especially further improving to above-mentioned technical proposal, the valve body placing trough and exhaust gas control valve
Shape is matched.
As a result of above-mentioned technical proposal, exhaust gas control valve Measuring error frock, for Measuring error exhaust gas control valve,
Including base, work case is installed on the base, valve body Mobile base, the valve body Mobile base are provided with the work case
On offer valve body placing trough；The work case is provided with coordinated signals switch, and the air inlet of the coordinated signals switch connects
Source of the gas is connected to, the gas outlet of the coordinated signals switch is connected with cleaning self-locking joint, the gas outlet of the coordinated signals switch
Air inlet cylinder and the outlet cylinder being located in the work case is also associated with, between the air inlet cylinder and the outlet cylinder
It is provided with coordinated signals passage, what the piston rod of the air inlet cylinder was connected with connection corresponding with exhaust gas control valve air inlet enters airtight
End socket, is communicated with inlet channel between coordinated signals switch and the inlet seal head, the air inlet cylinder be provided with
The inlet channel is connected with boost gauge；The piston rod of the outlet cylinder is connected with corresponding with exhaust gas control valve gas outlet
The outlet seal head of connection, the outlet seal head is communicated with outlet passageway, and the outlet cylinder is provided with logical with the outlet
Road is connected with outlet pressure table, and the outlet passageway is connected with compression relief cock；The base is provided with rinse bath and decompressor, institute
State the power supply connection corresponding with the power end of exhaust gas control valve of decompressor.
Exhaust gas control valve is put into into the valve body placing trough, it is described that the valve body Mobile base drives exhaust gas control valve to enter into
Corresponding test position in work case, connects exhaust gas control valve attaching plug.Control the coordinated signals switch connection institute
Source of the gas is stated, the piston rod point of the air inlet cylinder and the outlet cylinder action, the air inlet cylinder and the outlet cylinder is made
Do not stretch out, drive the inlet seal head and the outlet seal head to be fixedly clamped exhaust gas control valve, the inlet seal head with
Exhaust gas control valve air inlet correspondence is clamped and sealed, and the outlet seal head is corresponding with exhaust gas control valve gas outlet to be clamped and close
Envelope, exhaust gas control valve is clamped while sealing fixed, and the source of the gas is via the inlet channel, the boost gauge and institute
State inlet seal head and enter into exhaust gas control valve air inlet, gas goes out through exhaust gas control valve from the gas outlet of exhaust gas control valve
Come, at the outlet seal head, the outlet passageway, the outlet pressure table go directly the compression relief cock.
By the boost gauge and the outlet pressure table, the air inlet of exhaust gas control valve and the pressure of gas outlet are observed
Whether power is equal, judges whether the filter screen inside exhaust gas control valve blocks with this.The on and off switch of the decompressor is opened, is useless
Gas control valve provides 24V power supplys, and exhaust gas control valve coil motion, exhaust gas control valve performs Duty ratio control, by the outlet
Pressure gauge observes the gas outlet pressure of exhaust gas control valve whether in target zone, to judge whether deafener blocks.
When finding that the filter net jam or deafener of exhaust gas control valve are blocked by detection, the coordinated signals are switched off
The source of the gas, opens the piston rod difference return of the compression relief cock, the air inlet cylinder and the outlet cylinder, from the valve
Exhaust gas control valve is removed on body Mobile base, the filter screen or deafener of inside of dismantling are put into the rinse bath for filling cleanout fluid
Middle soaking and washing.By the outside air blowing pipeline of the cleaning self-locking joint connection, soaked filter screen or deafener are taken out, passed through
The source of the gas is supplied to the cleaning self-locking joint by the coordinated signals switch, and filter screen or deafener are blown off into dust, and
The valve body Mobile base is assembled into, repeats above-mentioned detection, until exhaust gas control valve is by test, can normal work.This
The bright fault diagnosis that can complete exhaust gas control valve and maintenance, are easy to carry, and greatly reduce the use of exhaust gas control valve
Cost.
Description of the drawings
The following drawings is only intended in schematic illustration and explanation is done to the present invention, is not delimit the scope of the invention.Wherein：
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the structural representation of embodiment of the present invention sidepiece.
In figure：1- bases；11- fixes guide rail；12- valve body Mobile bases；2- coordinated signals are switched；21- cleans self-locking joint；
3- air inlet cylinders；31- inlet seal heads；32- boost gauges；4- outlet cylinders；41- outlet seal heads；42- outlet pressures
Table；43- compression relief cocks；5- rinse baths；6- decompressors；7- protective covers；71- watch windows；Cover 72- sides；8- exhaust gas control valves.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is expanded on further.In the following detailed description, only by explanation
Mode describes some one exemplary embodiments of the present invention.Undoubtedly, one of ordinary skill in the art will recognize,
In the case of without departing from the spirit and scope of the present invention, can be being repaiied to described embodiment with a variety of modes
Just.Therefore, accompanying drawing and description are inherently illustrative, rather than for limiting scope of the claims.
As depicted in figs. 1 and 2, exhaust gas control valve Measuring error frock, for Measuring error exhaust gas control valve 8, including bottom
Seat 1, is provided with work case on the base 1, valve body Mobile base 12, the valve body Mobile base 12 are provided with the work case
On offer valve body placing trough；The work case is provided with coordinated signals switch 2, the air inlet of the coordinated signals switch 2
Source of the gas is connected with, the gas outlet of the coordinated signals switch 2 is connected with cleaning self-locking joint 21, the coordinated signals switch 2
Gas outlet be also associated be located at the work case in air inlet cylinder 3 and outlet cylinder 4, the air inlet cylinder 3 with it is described go out
Coordinated signals passage is provided between gas cylinder 4, the piston rod of the air inlet cylinder 3 is connected with and the air inlet pair of exhaust gas control valve 8
The inlet seal head 31 that should connect, is communicated with inlet channel, institute between the coordinated signals switch 2 and the inlet seal head 31
State air inlet cylinder 3 and be provided with and be connected with boost gauge 32 with the inlet channel；The piston rod of the outlet cylinder 4 is connected with
The outlet seal head 41 of connection corresponding with the gas outlet of exhaust gas control valve 8, the outlet seal head 41 is communicated with outlet passageway, described
Outlet cylinder 4 is provided with and is connected with outlet pressure table 42 with the outlet passageway, and the outlet passageway is connected with compression relief cock 43；
The base 1 is provided with rinse bath 5 and decompressor 6, and the power supply of the decompressor 6 is corresponding with the power end of exhaust gas control valve 8 to be connected
Connect.
Exhaust gas control valve 8 is put into into the valve body placing trough, the valve body Mobile base 12 drives exhaust gas control valve 8 to enter into
Corresponding test position in the work case, connects the attaching plug of exhaust gas control valve 8.Control the coordinated signals switch 2
The source of the gas is connected, the air inlet cylinder 3 and the outlet cylinder 4 action, the air inlet cylinder 3 and the outlet cylinder 4 is made
Piston rod stretch out respectively, drive the inlet seal head 31 and the outlet seal head 41 to be fixedly clamped exhaust gas control valve 8, institute
State that inlet seal head 31 is corresponding with the air inlet of exhaust gas control valve 8 to be clamped and seal, the outlet seal head 41 and exhaust gas control valve 8
Gas outlet correspondence is clamped and sealed, and exhaust gas control valve 8 is clamped while sealing fixed, and the source of the gas is logical via the air inlet
Road, the boost gauge 32 and the inlet seal head 31 of stating enter into the air inlet of exhaust gas control valve 8, and gas is through waste gas control
Valve processed 8 from the gas outlet of exhaust gas control valve 8 out, through the outlet seal head 41, the outlet passageway, the outlet pressure
Table 42 goes directly at the compression relief cock 43.
By the boost gauge 32 and the outlet pressure table 42, the air inlet and outlet of exhaust gas control valve 8 are observed
Whether the pressure of mouth is equal, judges whether the filter screen inside exhaust gas control valve 8 blocks with this.Open the power supply of the decompressor 6
Switch, is that exhaust gas control valve 8 provides 24V power supplys, and the coil motion of exhaust gas control valve 8, exhaust gas control valve 8 performs Duty ratio control,
The gas outlet pressure of exhaust gas control valve 8 is observed whether in target zone, to judge deafener by the outlet pressure table 42
Whether block.
When finding that the filter net jam or deafener of exhaust gas control valve 8 are blocked by detection, the coordinated signals switch 2 breaks
The source of the gas is opened, the piston rod difference return of the compression relief cock 43, the air inlet cylinder 3 and the outlet cylinder 4 is opened, from
Exhaust gas control valve 8 is removed on the valve body Mobile base 12, the filter screen or deafener of inside of dismantling are put into the institute for filling cleanout fluid
State soaking and washing in rinse bath 5.The cleaning self-locking joint 21 is connected into outside air blowing pipeline, take out soaked filter screen or
Deafener, is supplied to the cleaning self-locking joint 21, by filter screen or noise reduction by coordinated signals switch 2 by the source of the gas
Device blows off dust, and is assembled into the valve body Mobile base 12, repeats above-mentioned detection, until exhaust gas control valve 8 is by test,
Can normal work.The present embodiment can complete the fault diagnosis of exhaust gas control valve 8 and maintenance, as long as 2 kilograms can be provided
The source of the gas can be easy to carry with using with 220V power supplys, greatly reduce the use cost of exhaust gas control valve 8.
The fixed guide rail 11 being communicated with the base 1 inside and outside the work case, slides on the fixed guide rail 11
The valve body Mobile base 12 is connected with, said structure is easy to the slip of valve body Mobile base 12 turnover work case, is easy to
Dismounting exhaust gas control valve 8.
The work case includes protective cover 7, and watch window 71, the watch window 71 are offered on the protective cover 7
Both the working condition that can have been observed in the protective cover 7, is also convenient for the power supply of the decompressor 6 and the power supply of exhaust gas control valve 8
Connection between end.The sidepiece of the protective cover 7 is provided with side cover 72, and the correspondence of side cover 72 is led positioned at the fixation
The end of rail 11, the side cover 72 also serves as Mobile base positioning baffle, and the valve body Mobile base 12 drives exhaust gas control valve 8 to enter
To in the work case, the valve body Mobile base 12 is pushed away to the side cover 72 is touched, can just reach target detection position,
Positioning when said structure is easy to the valve body Mobile base 12 to detect, it is ensured that exhaust gas control valve 8 fixing to clamp and sealing.
Coordinated signals switch 2 includes threeway mechanical switch, the threeway mechanical switch include detection shelves, cleaning shelves and
Neutral.When being placed in the detection shelves, connect the source of the gas, make the air inlet cylinder 3 and the outlet cylinder 4 action, it is described enter
The piston rod of gas cylinder 3 and the outlet cylinder 4 stretches out respectively, drives the inlet seal head 31 and the outlet seal head 41
Be fixedly clamped exhaust gas control valve 8, and the inlet seal head 31 is corresponding with the air inlet of exhaust gas control valve 8 to be clamped and seal, it is described go out
Airtight end socket 41 is corresponding with the gas outlet of exhaust gas control valve 8 to be clamped and seals, and exhaust gas control valve 8 is clamped while sealing fixed,
Simultaneously the source of the gas enters into waste gas control via the inlet channel, the boost gauge 32 and the inlet seal head 31 of stating
The air inlet of valve processed 8, gas through exhaust gas control valve 8 from the gas outlet of exhaust gas control valve 8 out, through the outlet seal head
41st, the outlet passageway, the outlet pressure table 42 go directly at the compression relief cock 43.When being placed in the neutral, the air inlet
The piston rod difference return of cylinder 3 and the outlet cylinder 4, it is convenient to remove exhaust gas control valve 8 from the valve body Mobile base 12.
When being placed in the cleaning shelves, the cleaning self-locking joint 21 is connected into outside air blowing pipeline, will by coordinated signals switch 2
The source of the gas is supplied to the cleaning self-locking joint 21, filter screen or deafener can be blown off into dust.
The inlet channel is axially opened on the piston rod of the air inlet cylinder 3, the source of the gas of the inlet channel and institute
The work source of the gas isolation for stating air inlet cylinder 3 is arranged.The outlet passageway is axially opened on the piston rod of the outlet cylinder 4,
The source of the gas of the outlet passageway isolates setting with the work source of the gas of the outlet cylinder 4.When said structure both ensures to supply source of the gas,
The air inlet cylinder 3 and the outlet cylinder 4 promote respectively piston rod, ensure that source of the gas is detected into exhaust gas control valve 8 again.
The air inlet cylinder 3 is vertically positioned in the work case；The outlet cylinder 4 is positioned horizontally in the work case
It is interior.Said structure is conducive to fixing to clamp exhaust gas control valve 8, and can make the inlet seal head 31 with it is described go out it is airtight
The sealing corresponding with the air inlet of exhaust gas control valve 8 and gas outlet respectively of end socket 41.
The valve body placing trough is matched with the bottom shape of exhaust gas control valve 8, and said structure further ensures that waste gas control
The fixation of valve 8.
Ultimate principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (8)
1. exhaust gas control valve Measuring error frock, for Measuring error exhaust gas control valve, including base, it is provided with the base
Work case, it is characterised in that：Valve body Mobile base is provided with the work case, valve body is offered on the valve body Mobile base and is put
Put groove；
The work case is provided with coordinated signals switch, and the air inlet of the coordinated signals switch is connected with source of the gas, described
The gas outlet of dynamic controlling switch is connected with cleaning self-locking joint, and the gas outlet of the coordinated signals switch is also associated with positioned at described
Air inlet cylinder and outlet cylinder in work case, is provided with coordinated signals and leads between the air inlet cylinder and the outlet cylinder
Road, the piston rod of the air inlet cylinder is connected with the inlet seal head of connection corresponding with exhaust gas control valve air inlet, the linkage
Inlet channel is communicated between controlling switch and the inlet seal head, the air inlet cylinder is provided with and connects with the inlet channel
It is connected to boost gauge；The piston rod of the outlet cylinder be connected with it is corresponding with exhaust gas control valve gas outlet connection go out hermetic seal
Head, the outlet seal head is communicated with outlet passageway, and the outlet cylinder is provided with and is connected with out air pressure with the outlet passageway
Power table, the outlet passageway is connected with compression relief cock；
The base is provided with rinse bath and decompressor, and the power supply of the decompressor is corresponding with the power end of exhaust gas control valve to be connected
Connect.
2. exhaust gas control valve Measuring error frock as claimed in claim 1, it is characterised in that：Institute is communicated with the base
The fixed guide rail inside and outside work case is stated, the valve body Mobile base is slidably connected on the fixed guide rail.
3. exhaust gas control valve Measuring error frock as claimed in claim 2, it is characterised in that：The work case includes protection
Cover, offers watch window on the protective cover, the sidepiece of the protective cover is provided with side cover, and the side cover correspondence is located at institute
The end of fixed guide rail is stated, the side cover also serves as Mobile base positioning baffle.
4. exhaust gas control valve Measuring error frock as claimed in claim 1, it is characterised in that：The coordinated signals switch includes
Threeway mechanical switch, the threeway mechanical switch includes detection shelves, cleaning shelves and neutral.
5. exhaust gas control valve Measuring error frock as claimed in claim 1, it is characterised in that：The inlet channel is axially opened up
On the piston rod of the air inlet cylinder, the source of the gas of the inlet channel isolates setting with the work source of the gas of the air inlet cylinder.
6. exhaust gas control valve Measuring error frock as claimed in claim 1, it is characterised in that：The outlet passageway is axially opened up
On the piston rod of the outlet cylinder, the source of the gas of the outlet passageway isolates setting with the work source of the gas of the outlet cylinder.
7. the exhaust gas control valve Measuring error frock as described in claim 1 to 6 any claim, it is characterised in that：It is described
Air inlet cylinder is vertically positioned in the work case；The outlet cylinder is positioned horizontally in the work case.
8. the exhaust gas control valve Measuring error frock as described in claim 1 to 6 any claim, it is characterised in that：It is described
Valve body placing trough is matched with the bottom shape of exhaust gas control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510296139.XA CN104847466B (en) | 2015-06-02 | 2015-06-02 | Exhaust control valve inspection maintenance fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510296139.XA CN104847466B (en) | 2015-06-02 | 2015-06-02 | Exhaust control valve inspection maintenance fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104847466A CN104847466A (en) | 2015-08-19 |
| CN104847466B true CN104847466B (en) | 2017-04-12 |
Family
ID=53847383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510296139.XA Active CN104847466B (en) | 2015-06-02 | 2015-06-02 | Exhaust control valve inspection maintenance fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104847466B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116624646B (en) * | 2023-06-02 | 2024-04-05 | 江南阀门有限公司 | Assembling equipment for pressure regulating valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3341511B2 (en) * | 1995-01-13 | 2002-11-05 | 富士電機株式会社 | Stem-free test equipment for main steam stop valve |
| CN201378106Y (en) * | 2009-03-06 | 2010-01-06 | 中油吉林化建工程股份有限公司 | Simple regulating valve pressure test bed |
| CN201749002U (en) * | 2010-08-04 | 2011-02-16 | 大连智云自动化装备股份有限公司 | Airtight detector of valve seat fuel charging valve |
| CN103076142A (en) * | 2012-12-29 | 2013-05-01 | 浙江欣尔利洁具股份有限公司 | Water testing tool of water faucet |
| CN103808472A (en) * | 2014-01-27 | 2014-05-21 | 玉林市中创机械有限公司 | Automatic diving leakage testing machine for water pump semi-finished product |
| CN204646387U (en) * | 2015-06-02 | 2015-09-16 | 潍柴西港新能源动力有限公司 | Exhaust gas control valve Measuring error frock |
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2015
- 2015-06-02 CN CN201510296139.XA patent/CN104847466B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104847466A (en) | 2015-08-19 |
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