CN209569095U - A kind of the top arragement construction and engine of engine - Google Patents

A kind of the top arragement construction and engine of engine Download PDF

Info

Publication number
CN209569095U
CN209569095U CN201822238423.3U CN201822238423U CN209569095U CN 209569095 U CN209569095 U CN 209569095U CN 201822238423 U CN201822238423 U CN 201822238423U CN 209569095 U CN209569095 U CN 209569095U
Authority
CN
China
Prior art keywords
engine
intercooler
air inlet
arragement construction
charge
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.)
Active
Application number
CN201822238423.3U
Other languages
Chinese (zh)
Inventor
钟跃兰
何红双
张威
李德胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weichai Power Co Ltd
Original Assignee
Weichai Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Weichai Power Co Ltd filed Critical Weichai Power Co Ltd
Priority to CN201822238423.3U priority Critical patent/CN209569095U/en
Application granted granted Critical
Publication of CN209569095U publication Critical patent/CN209569095U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

The utility model discloses the top arragement constructions and engine of a kind of engine, including heat exchanger, main intercooler, engine air inlet tube and the tailpipe being sequentially arranged on the line of centres of the front end of engine to the rear end of engine, engine air inlet tube includes that inlet manifold and air inlet are in charge of, and tailpipe is located at air inlet and is in charge of on folder bisector of angle;Fuel filter and oil filter are located at the two sides of heat exchanger;First air cleaner and the second air cleaner are symmetrically distributed in the two sides of main intercooler;First low-pressure stage booster and the second low-pressure stage booster are symmetrically distributed in the two sides of the line of centres and arrange respectively close to the outside that angle is in charge of in air inlet;The port arrangements that intercooler is symmetrically distributed in the two sides of the line of centres and is in charge of respectively close to the air inlet of respective side between intercooler and the second level between the first order.The top arragement construction of above-mentioned engine realizes the compact arrangement of complicated h type engine h by the structure type being arranged symmetrically.

Description

A kind of the top arragement construction and engine of engine
Technical field
The utility model relates to engine integral arrangement technical field more particularly to a kind of top arragement constructions of engine And engine.
Background technique
It is also more and more harsh for the design requirement of engine with the continuous development and maturation of Engine Industry, start The integral arrangement of machine gradually starts to tend to minute design and compact design direction is developed.
It is directed to for the engine of complexity, for example the engine of the two-step supercharging gas handling system configured with double air inlets comes Say, the design of Yao Shixian densification is even more extremely difficult, and at present for two-step supercharging gas handling system engine still not compared with Good compact arrangement mode.
In conclusion the problem of how realizing the compact arrangement of the engine of double air inlet two-step supercharging gas handling systems is Technical problem as those skilled in the art's urgent need to resolve.
Utility model content
The purpose of the utility model is to provide the top arragement constructions and engine of a kind of engine, to realize double air inlets two The problem of compact arrangement of the engine of grade compressed air induction system.
To achieve the goals above, the utility model provides a kind of top arragement construction of engine, including is arranged in The heat exchanger on the top of engine, fuel filter, oil filter, main intercooler, engine air inlet tube, tailpipe, It is cold between first air cleaner, the second air cleaner, the first low-pressure stage booster, the second low-pressure stage booster, the first order Intercooler between device and the second level;
The heat exchanger, main intercooler, engine air inlet tube and tailpipe are in the front end of the engine to described It is sequentially arranged on the line of centres of the rear end of engine, the engine air inlet tube includes the air inlet along line of centres arrangement The air inlet that general pipeline and being connected to the inlet manifold is symmetrically distributed in the line of centres two sides is in charge of, and two air inlets point The air inlet that pipe is constituted is in charge of angle less than 180 °, and the tailpipe is located at the air inlet and is in charge of on folder bisector of angle;
The fuel filter and the oil filter are located at the two sides of the heat exchanger;
First air cleaner and second air cleaner are symmetrically distributed in the two sides of the main intercooler;
The first low-pressure stage booster and the second low-pressure stage booster are symmetrically distributed in the two of the line of centres Side and the outside arrangement for being in charge of angle close to the air inlet respectively;
Between the first order between intercooler and the second level intercooler be symmetrically distributed in the line of centres two sides and The port arrangements being in charge of respectively close to the air inlet of respective side.
Preferably, the fuel filter and the oil filter are in parallel arrangement.
Preferably, the fuel filter and oil filter arrangement at an acute angle.
Preferably, first air cleaner and second air cleaner are in parallel arrangement.
Preferably, first air cleaner and the second air cleaner arrangement at an acute angle.
Preferably, intercooler is in parallel arrangement between intercooler and the second level between the first order.
Preferably, intercooler arrangement at an acute angle between intercooler and the second level between the first order.
Preferably, the top of the engine there also is provided electronic control unit and its harness, and the electronic control unit and its line Beam is located at the heat exchanger towards on the front end side of the engine.
Preferably, the top of the engine there also is provided hanging ring, and the hanging ring includes the first hanging ring, the second hanging ring and the Three hanging rings;First hanging ring and second hanging ring are symmetrically distributed in the two sides of the line of centres, and first hanging ring In the first avoiding space that the fuel filter and the air cleaner of respective side are formed, second hanging ring is located at institute In the second avoiding space for stating the air cleaner formation of oil filter and respective side;
The third hanging ring be arranged on the line of centres and be located at the air inlet be in charge of angle vertex and the row In the third avoiding space formed between gas tail pipe.
Content, the top arragement construction of above-mentioned engine, the top including being arranged in engine are introduced compared to background technique Heat exchanger, fuel filter, oil filter, main intercooler, engine air inlet tube, tailpipe, first air filter at end Intercooler and the second level clearly between device, the second air cleaner, the first low-pressure stage booster, the second low-pressure stage booster, the first order Between intercooler;Heat exchanger, main intercooler, engine air inlet tube and tailpipe are in the front end of engine to the rear end of engine The line of centres on be sequentially arranged, engine air inlet tube include along line of centres arrangement inlet manifold and be connected to inlet manifold The air inlet for being symmetrically distributed in line of centres two sides is in charge of, and two air inlets are in charge of constituted air inlet and are in charge of angle less than 180 °, And tailpipe is located at air inlet and is in charge of on folder bisector of angle;Fuel filter and oil filter are located at heat exchanger Two sides;First air cleaner and the second air cleaner are symmetrically distributed in the two sides of main intercooler;First low-pressure stage booster The two sides of the line of centres are symmetrically distributed in the second low-pressure stage booster and are arranged respectively close to the outside that angle is in charge of in air inlet;The Intercooler is symmetrically distributed in the two sides of the line of centres and respectively close to the air inlet of respective side point between intercooler and the second level between level-one The port arrangements of pipe.The top arragement construction of above-mentioned engine, by the structure type being arranged symmetrically, and between all parts Close to the structure type of arrangement, each system parts that the top of engine is related to spatially mutually are inlayed and are interted, such as Heat exchanger and fuel filter and oil filter spatially shared, what the air inlet of interstage plenum device and respective side was in charge of Port can also promote the compactedness of the arrangement of engine top entirety using interspersed design method close to arrangement.Entirely On the basis of meeting performance and maintenance requirement, when design, has fully considered mutual evacuation for engine system and components, thus Realize the clear superiority in entire engine size.Due to taking full advantage of the arrangement space on engine top, make entirely to start Machine it is compact-sized, realize the compact arrangement of the complicated h type engine h of double air inlet two-step supercharging gas handling systems.
In addition, the utility model additionally provides a kind of engine, and the top arragement construction including engine, top arrangement Structure is top arragement construction described in any of the above-described scheme.Since above-mentioned top arragement construction has above-mentioned technique effect, Therefore the engine with above-mentioned top arragement construction should also have corresponding technical effect, and details are not described herein.
Detailed description of the invention
Fig. 1 is the schematic diagram of the top arragement construction of engine provided by the embodiment of the utility model;
Fig. 2 is the structural schematic diagram that the position of third hanging ring is observed in the front end of engine provided by the embodiment of the utility model (parts thereof is omitted in the view).
In figure 1 above and Fig. 2,
Heat exchanger 1, fuel filter 2, oil filter 3, main intercooler 4, engine air inlet tube 5, inlet manifold 51, 52, tailpipe 6, the first air cleaner 71, the second air cleaner 72, the first low-pressure stage booster 81, are in charge of in air inlet Intercooler 92, the line of centres 10, electronic control unit and its line between intercooler 91, the second level between two low-pressure stage boosters 82, the first order Beam 11, the first hanging ring 12a, the second hanging ring 12b, third hanging ring 12c, bracket 13, the first air inlet tube 14a, the second air inlet tube 14b, the first cylinder cap 15a, the second cylinder cap 15b, body 16, the first rocker arm bonnet 17a, the second rocker arm bonnet 17b.
Specific embodiment
The core of the utility model is to provide the top arragement construction and engine of a kind of engine, to realize double air inlets two The problem of compact arrangement of the engine of grade compressed air induction system.
In order to make those skilled in the art more fully understand technical solution provided by the utility model, below in conjunction with attached The utility model is described in further detail with specific embodiment for figure.
As depicted in figs. 1 and 2, the top arragement construction of a kind of engine provided by the embodiment of the utility model, including cloth Set the heat exchanger 1 on the top of engine, fuel filter 2, oil filter 3, main intercooler 4, engine air inlet tube 5, Tailpipe 6, the first air cleaner 71, the second air cleaner 72, the first low-pressure stage booster 81, the pressurization of the second low-pressure stage Intercooler 92 between intercooler 91 and the second level between device 82, the first order;Heat exchanger 1, main intercooler 4,5 and of engine air inlet tube Tailpipe 6 is sequentially arranged on the line of centres 10 of the front end of engine to the rear end of engine, and engine air inlet tube 5 wraps Include the inlet manifold 51 arranged along the line of centres 10 and be connected to inlet manifold 51 be symmetrically distributed in 10 two sides of the line of centres into Gas, which is in charge of 52, and two air inlets and is in charge of the air inlet that 52 are constituted, is in charge of angle less than 180 °, and tailpipe 6 is in charge of positioned at air inlet It presss from both sides on bisector of angle;Fuel filter 2 and oil filter 3 are located at the two sides of heat exchanger 1;First air cleaner 71 and second air cleaner 72 be symmetrically distributed in the two sides of main intercooler 4;First low-pressure stage booster 81 and the second low-pressure stage Booster 82 is symmetrically distributed in the two sides of the line of centres 10 and arranges respectively close to the outside that angle is in charge of in air inlet;Between the first order Intercooler 92 is symmetrically distributed in the two sides of the line of centres 10 and respectively close to the air inlet of respective side point between intercooler 91 and the second level The port arrangements of pipe 52.
The top arragement construction of above-mentioned engine, by the structure type being arranged symmetrically, and between all parts close to The structure type of arrangement, each system parts that the top of engine is related to spatially mutually are inlayed and are interted, such as hot friendship Shared, the end that the air inlet of interstage plenum device and respective side is in charge of of parallel operation 1 and fuel filter 2 and oil filter spatially Tight-lipped adjacent arrangement can also promote the compactedness of the arrangement of engine top entirety using interspersed design method.Entire hair On the basis of meeting performance and maintenance requirement, when design, has fully considered mutual evacuation for motivation system and components, thus real The now clear superiority in entire engine size.Due to taking full advantage of the arrangement space on engine top, make entire engine It is compact-sized, realize the compact arrangement of the complicated h type engine h of double air inlet two-step supercharging gas handling systems.
In addition, the safety that the engine top arragement construction that the utility model is supplied to can also promote engine operating can By property: because the motor head space of this kind of arragement construction is big, attendant's frequent activity is inspected periodically and maintenance part It is arranged in front end;The high temperature components such as booster and exhaust pipe are arranged in engine rear end, general without maintenance.Front end is dimension Area is protected, whole region temperature is low, and rear end is high-temperature region, and the oil strainer and fuel filter apart from front end farther out, arrange by such structure, Both safety when engine operating had been can ensure that, when also can guarantee engine operating, patrol officer is in the movable safety in front end.
It should be noted that those skilled in the art will readily appreciate that, and for DIS Dual Induction System, first Intercooler 91 is sequentially connected in series between air cleaner 71, the first low-pressure stage booster 81 and the first order, the second air cleaner 72, Intercooler 92 is sequentially connected in series between two low-pressure stage boosters 82 and the second level;First air cleaner 71 and the first low-pressure stage booster Pass through the by the first air inlet tube 14a connection between 81, between the second air cleaner 72 and the second low-pressure stage booster 82 Two air inlet tube 14b connections.It is further to note that for the engine system of double air inlets, such as V-type engine, Should also include on its body 16 the first cylinder cap 15a being arranged on corresponding body, the second cylinder cap 15b, the first rocker arm bonnet 17a and Second rocker arm bonnet 17b.Simultaneously, it is contemplated that valve clearance need to often adjust, and when each parts design of engine, need sufficiently reserved The withdrawal space of rocker arm bonnet and its fastener.
It should also be noted that, those skilled in the art will readily appreciate that, the front end of engine refers to correspondence The side that engine often overhauls, the left side of corresponding diagram 1;The rear end of engine refers to opposite one in the front end of corresponding engine Side, the right side of corresponding diagram 1.
In some specific embodiments, above-mentioned fuel filter 2 can be in the side of parallel arrangement with oil filter 3 Formula arrangement, can also be arranged, and the angle is acute angle in mode in a certain angle.
Similarly, the first air cleaner 71 can be arranged with the second air cleaner 72 in a manner of parallel arrangement, It can be arranged in mode in a certain angle, and the angle is acute angle;Intercooler 92 can between intercooler 91 and the second level between the first order It arranges, can also be arranged in mode in a certain angle, and the angle is acute angle in a manner of in parallel arrangement
In further embodiment, the top of above-mentioned engine there also is provided electronic control unit and its harness 11, and automatically controlled Unit and its harness 11 are located at heat exchanger 1 towards on the front end side of engine.Because for electronic control unit and its harness Belong to the component for being frequently necessary to maintenance, by designing in the front end of engine, more convenient inspection operation.
In further embodiment, in order to facilitate the lifting of engine, hanging ring there also is provided on the top of engine, The hanging ring specifically includes the first hanging ring 12a, the second hanging ring 12b and third hanging ring 12c;12b pairs of first hanging ring 12a and the second hanging ring Claim the two sides for being distributed in the line of centres 10, and the first hanging ring 12a is located at the air cleaner shape of fuel filter 2 Yu respective side At the first avoiding space in, the air cleaner that the second hanging ring 12b is located at oil filter 3 and respective side formed second In avoiding space;Third hanging ring 12c be arranged on the line of centres 10 and be located at air inlet be in charge of angle vertex and tailpipe 6 it Between in the third avoiding space that is formed.Components by the way that hanging ring to be arranged in the top of engine rationally avoid empty between each other In, while so that engine can be realized lifting, further the arrangement space on top is utilized, to realize whole A engine system and components realize obvious in entire engine size on the basis of meeting performance and maintenance requirement Advantage.What needs to be explained here is that because comparatively the position of third hanging ring belongs to the structure type stretched out in slit, In order to facilitate the installation of third hanging ring, bracket 13 is introduced generally on the rear end face in engine, third hanging ring 12c is directly pacified On bracket 13.
In addition, the utility model additionally provides a kind of engine, and the top arragement construction including engine, top arrangement Structure is top arragement construction described in any of the above-described scheme.Since above-mentioned top arragement construction has above-mentioned technique effect, Therefore the engine with above-mentioned top arragement construction should also have corresponding technical effect, and details are not described herein.
The top arragement construction and engine of engine provided by the utility model are described in detail above.It needs It is noted that all the embodiments in this specification are described in a progressive manner, each embodiment is stressed It is the difference from other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should also be noted that, herein, such as the terms "include", "comprise" or its any other variant are intended to contain Lid non-exclusive inclusion, so that article or equipment including a series of elements not only include those elements, but also It including other elements that are not explicitly listed, or further include for this article or the intrinsic element of equipment.Do not having In the case where more limitations, the element that is limited by sentence "including a ...", it is not excluded that in the article including above-mentioned element Or there is also other identical elements in equipment.
Specific case used herein is expounded the principles of the present invention and embodiment, above embodiments Explanation be merely used to help understand the core concept of the utility model.It should be pointed out that for the ordinary skill of the art For personnel, without departing from the principle of this utility model, several improvements and modifications can be made to this utility model, Modifications and modifications also fall within the protection scope of the claims of the utility model.

Claims (10)

1. a kind of top arragement construction of engine, which is characterized in that the heat exchanger including being arranged in the top of engine (1), fuel filter (2), oil filter (3), main intercooler (4), engine air inlet tube (5), tailpipe (6), first Air cleaner (71), the second air cleaner (72), the first low-pressure stage booster (81), the second low-pressure stage booster (82), Intercooler (92) between intercooler (91) and the second level between the first order;
The heat exchanger (1), main intercooler (4), engine air inlet tube (5) and tailpipe (6) are before the engine It holds and is sequentially arranged on the line of centres (10) of the rear end of the engine, the engine air inlet tube (5) includes in described It the inlet manifold (51) of heart line (10) arrangement and is connected to the inlet manifold (51) and is symmetrically distributed in the line of centres (10) air inlet of two sides is in charge of (52), and two air inlets are in charge of the air inlet that (52) are constituted and are in charge of angle less than 180 °, and The tailpipe (6) is located at the air inlet and is in charge of on folder bisector of angle;
The fuel filter (2) and the oil filter (3) are located at the two sides of the heat exchanger (1);
First air cleaner (71) and second air cleaner (72) are symmetrically distributed in the main intercooler (4) Two sides;
The first low-pressure stage booster (81) and the second low-pressure stage booster (82) are symmetrically distributed in the line of centres (10) it two sides and is arranged respectively close to the outside that angle is in charge of in the air inlet;
Intercooler (92) is symmetrically distributed in the line of centres (10) between intercooler (91) and the second level between the first order Two sides and be in charge of the port arrangements of (52) close to the air inlet of respective side respectively.
2. the top arragement construction of engine as described in claim 1, which is characterized in that the fuel filter (2) and institute Oil filter (3) are stated in parallel arrangement.
3. the top arragement construction of engine as described in claim 1, which is characterized in that the fuel filter (2) and institute State oil filter (3) arrangement at an acute angle.
4. the top arragement construction of engine as described in claim 1, which is characterized in that first air cleaner (71) With second air cleaner (72) in parallel arrangement.
5. the top arragement construction of engine as described in claim 1, which is characterized in that first air cleaner (71) With second air cleaner (72) arrangement at an acute angle.
6. the top arragement construction of engine as described in claim 1, which is characterized in that intercooler (91) between the first order Intercooler (92) is in parallel arrangement between the second level.
7. the top arragement construction of engine as described in claim 1, which is characterized in that intercooler (91) between the first order Intercooler (92) arrangement at an acute angle between the second level.
8. the top arragement construction of engine as described in claim 1, which is characterized in that the top of the engine is also arranged There are electronic control unit and its harness (11), and the electronic control unit and its harness (11) are located at the heat exchanger (1) described in On the front end side of engine.
9. such as the top arragement construction of engine of any of claims 1-8, which is characterized in that the engine Top there also is provided hanging ring, and the hanging ring includes the first hanging ring (12a), the second hanging ring (12b) and third hanging ring (12c);It is described First hanging ring (12a) and second hanging ring (12b) are symmetrically distributed in the two sides of the line of centres (10), and described first hangs Ring (12a) is located in the first avoiding space of the air cleaner formation of the fuel filter (2) and respective side, and described second Hanging ring (12b) is located in the second avoiding space of the air cleaner formation of the oil filter (3) and respective side;
The third hanging ring (12c) is arranged on the line of centres (10) and is located at vertex and institute that angle is in charge of in the air inlet It states in the third avoiding space formed between tailpipe (6).
10. a kind of engine, the top arragement construction including engine, which is characterized in that the top arragement construction is as weighed Benefit requires top arragement construction described in any one of 1-9.
CN201822238423.3U 2018-12-28 2018-12-28 A kind of the top arragement construction and engine of engine Active CN209569095U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201822238423.3U CN209569095U (en) 2018-12-28 2018-12-28 A kind of the top arragement construction and engine of engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201822238423.3U CN209569095U (en) 2018-12-28 2018-12-28 A kind of the top arragement construction and engine of engine

Publications (1)

Publication Number Publication Date
CN209569095U true CN209569095U (en) 2019-11-01

Family

ID=68331349

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201822238423.3U Active CN209569095U (en) 2018-12-28 2018-12-28 A kind of the top arragement construction and engine of engine

Country Status (1)

Country Link
CN (1) CN209569095U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112664313A (en) * 2020-12-21 2021-04-16 中国北方发动机研究所(天津) Diesel engine two-stage supercharging interstage inter-cooling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112664313A (en) * 2020-12-21 2021-04-16 中国北方发动机研究所(天津) Diesel engine two-stage supercharging interstage inter-cooling system

Similar Documents

Publication Publication Date Title
US8291699B2 (en) Exhaust manifold of a turbo-supercharged reciprocating engine
US7930877B2 (en) Exhaust system for an internal combustion engine provided with an exhaust gas recirculation circuit
US10006342B2 (en) Exhaust flow valve for twin-scroll turbine and operating methods thereof
CN104879207B (en) Twin turbo-charger system for the internal combustion engine with cylinder deactivation feature
CN209569095U (en) A kind of the top arragement construction and engine of engine
EP2683925A1 (en) Method for upgrading an engine, upgrade kit for an engine and internal combustion engine
KR102080949B1 (en) Supercharged internal combustion engine in modular design and modular system for such internal combustion engines and supercharging device
JP5937863B2 (en) engine
JP2008223740A (en) Internal combustion engine
CN102808682A (en) Internal combustion locomotive operating under extremely high-temperature ultra-strong sand wind environment
CN202970956U (en) EGR (Exhaust Gas Recirculation) system with double waste gas passages
EP2884072A1 (en) Intake manifold for a supercharged internal combustion engine with a built-in intercooler and provided with a heat exchanger for a high-pressure EGR circuit
FI124964B (en) Exhaust module and piston engine
JP2017057823A (en) Exhaust apparatus of engine with supercharger
EP2123870B1 (en) Blowby gas treatment system for multiple cylinder engine
CN207437230U (en) The bull-dozer inlet duct of airintake direction can be changed
KR102383215B1 (en) Engine system
JP2017065608A (en) Intake duct structure of internal combustion engine, and internal combustion engine
CN204984667U (en) Supercharged engine of leading forerunner, sharing of leading rear -guard advances exhaust system
US20120317979A1 (en) Arrangement of two independently operated turbochargers for a combustion engine, and method of operating the two turbochargers
CN204755047U (en) EGR structure of integrated form exhaust manifold assembly and engine
KR101799532B1 (en) Engine
CN102943706A (en) Intercooler for diesel engine
WO2024045476A1 (en) Four-pressurization structure of v engine and v engine
CN203515888U (en) Empty intercooling type electronic-control explosion-proof diesel engine

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant