CN1483847A - Pressure casting aluminium aluminium alloy for cylinder of minicar engine - Google Patents
Pressure casting aluminium aluminium alloy for cylinder of minicar engine Download PDFInfo
- Publication number
- CN1483847A CN1483847A CNA031178340A CN03117834A CN1483847A CN 1483847 A CN1483847 A CN 1483847A CN A031178340 A CNA031178340 A CN A031178340A CN 03117834 A CN03117834 A CN 03117834A CN 1483847 A CN1483847 A CN 1483847A
- Authority
- CN
- China
- Prior art keywords
- alloy
- cylinder body
- aluminium
- pressure casting
- cylinder
- 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.)
- Pending
Links
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to a mnicar engine cylinder pressure casting aluminium alloy, and its chemical component composition includes (wt%) Cu 1.5-3.0%, Si 10.0-12.0%, Mg 0.15-0.35%, the rest is al and the other is impurity. Said alloy tensile strength Qb is greater than or equal to 300MP. Said alloy has enough strength and rigidity and good size stability. Said alloy can meet the requirements for minicar engine cylinder body high-pressure casting process and mechanical working process.
Description
Technical field
The present invention relates to a kind of aluminum alloy materials, especially with the aluminum alloy materials of the high-pressure casting that can be used to make minicar engine cylinder body.
Background technology
What at present, the minicar engine cylinder body material generally adopted is cast iron.Chang'an, Chongqing company introduces the G of Japan Suzuki Co., Ltd. Engine Series, novel minibus and car production technology during the State's Ninth Five-Year Plan period, and it comprises numerous novel materials, new technology and novel process.The aluminium alloying of cylinder body, cylinder cap significantly wherein to realize lightweight, reaches loss of weight, energy-conservation, the purpose that reduces pollution emissions.For realizing the batch process of engine as early as possible, cylinder body, the industrialization of cylinder cap assembly are to stand in the breach.Wherein, cylinder body is one of crucial project with the research project of high-pressure casting aluminum alloy materials.
The cylinder body of Japan Suzuki Co., Ltd. is used is that the ADC12 diecasting aluminum-silicon alloy of Japan is manufactured, and this material is domestic still not to be had the corresponding standard material at present and can adopt, and needs a large amount of imports, the cost height.Simultaneously, find that in use each element percentage composition scope is big in the chemical ingredients of Japanese ADC12 diecasting aluminum-silicon alloy, the deficiency that particularly exists each detrimental impurity to control undemanding defective and the Mg element is considered as impurity.Because in alloy, the effect of magnesium Mg is the processing characteristics that improves aluminium alloy; The Mg solid solution improves its hardness in the Al matrix, smear metal shortens, and is difficult for sticking cutter, and built-up edge reduces, and machined surface quality improves, and the wearing and tearing of cutter reduce; Mg has reduced the electropotential of alloy, improves the solidity to corrosion of aluminium alloy.And the Mg element is considered deficiency can cause the processing characteristics of aluminium alloy undesirable.In addition, they can form low melting point eutectic impurity element Sn and Pb, and are totally unfavorable to thermal treatment, and the Sn of denier also can make the unit elongation after the thermal treatment significantly reduce, and therefore also must reasonably control the content of impurity element Sn and Pb.As seen the above-mentioned defective that exists based on Japanese ADC12, it is suitable to develop a kind of mechanical property, processing performance, processing characteristics and ADC12, and overcome its insufficient low-pressure casting and diecasting aluminum-silicon alloy, and use it for the G Engine Series cylinder cap of Chang'an company and the production of cylinder body, be very necessary.
Summary of the invention
Purpose of the present invention is just for this needs, overcome the deficiency of the ADC12 diecasting aluminum-silicon alloy material existence of existing Japan, a kind of minicar engine cylinder body aluminium diecast alloy is provided, this aluminum alloy chemically optimizing components is reasonable, mechanical property is better than ADC12 height, processing performance, can satisfy the needs of G Engine Series cylinder body high-pressure casting technology and mechanical processing technique fully.
The main chemistry and the percentage composition of aluminum alloy materials of the present invention are: Cu1.5-3.0%, Si10.0-12.0%, Ng0.15-0.35%; The Al surplus; The content of impurity is: Zn≤0.90%, Fe≤0.90, Mn≤0.40%, Ni≤0.40%, Sn≤0.10%, Pb≤0.10%.
In the above-mentioned materials, the content of Chemical Composition Cu and Mg is chosen the comparison uniqueness, based on following reason:
Cu: when the Cu solid solution existed in the Al matrix or with the particulate state compound form, intensity, hardness, the mechanical behavior under high temperature that can significantly improve aluminium alloy were creep property, but unit elongation has reduction slightly; When Cu exists with netted compound form, will seriously reduce unit elongation, the intensity of aluminium alloy.
The chemical potential of Cu easily produces intergranular corrosion and stress corrosion than the Al height, and the solidity to corrosion that contains the Cu aluminium alloy reduces, when especially Cu exists with compound form, so the higher aluminium alloy of solidity to corrosion often limits the content of Cu.
In addition, the Al-Cu alloy has the solidification temperature range of broad, and the adding intensive of Cu reduces the flowing property of aluminium alloy, increases the hot cracking tendency of aluminium alloy.
Therefore, Cu content generally is controlled at 2～4%.
Magnesium Ng: the processing characteristics of the raising aluminium alloy of effect.
The Mg solid solution improves its hardness in the Al matrix, smear metal shortens, and is difficult for sticking cutter, and built-up edge reduces, and machined surface quality improves, and the wearing and tearing of cutter reduce.
Ng has reduced the electropotential of alloy, improves the solidity to corrosion of aluminium alloy.
Therefore, Mg content generally is controlled at 0.2～0.4%.
All the other impurity elements are chosen comparatively especially to be had:
Iron (Fe): it is the major impurity element in the aluminum silicon alloy, and it is mainly from furnace charge, crucible and melting instrument.To diecasting aluminum-silicon alloy, the high slightly Fe of content that allows Fe crosses low meeting because of content mold sticking takes place below 0.9, contains higher Fe and can make oxide film lose continuity, can improve mold sticking.In addition for the deleterious effect of eliminating the Fe phase can micro-Mn, Ni, Be etc. makes it exist with Chinese character shape complex compound form, eliminated the deleterious effect that original needle-like Fe weakens matrix mutually.Improve its disadvantageous effect to mechanical property, flowability, processibility.The content of Mn and Ni is about 0.4%.
They can form low melting point eutectic other impurity element Sn and Pd, and are totally unfavorable to thermal treatment, and the Sn of denier also can make the unit elongation after the thermal treatment significantly reduce, and therefore must limit the content of Sn, Pb below 0.10%.
Below be that aluminum alloy materials of the present invention (trade mark GYL-1) and the same type of material (ADC12) that Japan produces are contrasted:
The Chemical Composition contrast table
The mechanical property contrast table
| The trade mark | ????Cu | ????Si | ????Mg | ???Zn | ???Fe | ????Mn | ???AL | ????Ni | ????Sn | ????Pb |
| ?GYL-1 | ?1.5ˉ3.0?? | ?10.0ˉ12.0 | ???0.15ˉ0.35 | ??≤0.90 | ??≤0.90 | ??≤0.40 | Surplus | ??≤0.40 | ??≤0.10 | ?≤0.10 |
| ?ADC12 | ?1.5ˉ3.5 | ?9.6ˉ12.0 | ???≤0.30 | ??≤1.00 | ??≤1.30 | ??≤0.50 | Surplus | ??≤0.30 | ??≤0.30 |
| The trade mark | State | ??σ b(MPa) | ????δ(％) |
| ??GYL-1 | Die casting | ????≥300 | ????≥1.5 |
| ??ADC12 | Die casting | ????147ˉ265 | ????0.7ˉ2.9 |
As seen, the chemical ingredients of this aluminium diecast alloy GYL-1 is more excellent, and tensile strength of mechanical property and unit elongation all are higher than ADC12.
Below be test and the detection case that this material is done:
1, show by cylinder body extrusion process test production practice: the comprehensive casting technique performance of GYL-1 die-cast aluminum alloy material is good.Concrete detected result
(1) casting dimension detects: cylinder block casting is through three-dimensional and scribing inspection, and satisfy ± 0.25mm accuracy requirement (CT6 level) little, the important mechanical workout position of casting deformation, and general casting dimension accuracy can reach the CT8 level, and basic symbols is closed drawing of rough casting requirement; Installation detects and meets JL472Q, JL474Q technology of gasoline engine standard; The die-cast rotor housing casting deformation is little, and process redundancy satisfies the machining dimension requirement.
(2) foundry goods anatomy: the inner quality of foundry goods mainly is the pore problem.Key is the size of pore, the position that what and pore exist.Analyse and observe the position specifying part position according to the drawing of rough casting and dissect sampling observation, the cylinder body die casting satisfies the related request that the drawing of rough casting proposes fully, has guaranteed that important position, mechanical workout hole pore-free exists.
(3) foundry goods appearance surfaces quality and qualified situation: aluminum alloy melt flowability good, the surface-brightening of die casting (roughness 1.6), profile not only attractive in appearance is complete, and the control of explanation press casting procedure better (is pressed chamber pressure, mould temperature, gate area, alloy temperature), the curdled appearance of foundry goods is normal, quality is even, the intensity height, alloy graining shrinks no decrepitation, and the macroscopic test quality satisfies the two class foundry goods requirements that the drawing of rough casting proposes.
(4) do not find decrepitation in the foundry goods of producing, the product stripping type is good.
Up to the present die casting production line accumulative total is produced 800 of cylinder block castings, and qualification rate reaches about 90%.Decrepitation is found at the end in the foundry goods of producing, and the product stripping type is good.
2, by the explanation of mechanical processing technique verification experimental verification: the mechanical processing technique of GYL-1 die-cast aluminum alloy material is functional.Mainly show as:
(1) step cover contacts with the Boring mill bearing and forms the crankshaft hole part, for heterotypic material is processed simultaneously.Cylinder body is not found distortion.
(2) cylinder body carries out leak test, because aluminium diecast alloy dense structure, and relatively evenly, leak test qualification rate height.
(3) cylinder body is because manufacturing procedure is many, and the situation of not finding the cramping distortion man-hour is located, added to the product clamping.
(4) surfacing after the testpieces machining is smooth, and surfaceness satisfies product requirement, particularly reaches the surfaceness Rz3.2 requirement of (being equivalent to Ra0.6), in addition have reach Ra 0.32.
(5) the testpieces machining reaches the high-precision requirement of product, particularly accuracy of form and position requirement, crankshaft hole circularity reach φ 0.008 in addition have reach φ 0.007.
(6) threaded hole of cylinder body is many, and former material bad tooth phenomenon occurs easily in the machine added-time, cause half-finished scrapping, and bad tooth phenomenon seldom appears in the cylinder body of this material, illustrates that the obdurability of this material is good.
Novel material is in the production process of batch machining, and every index that machine adds reaches the high-precision requirement of product, even exceeds a lot, and this shows this material excellent cutting performance, and dimensional stabilizing is good, and obdurability is good.
Through 500 hours working reliabilities close the frame test and. the entrucking road operation test, the running of an engine of novel alloy cylinder body assembling is good, cylinder body is ablated, distortion and seepage (oil, water) phenomenon, the complete machine performance index reach the company standard requirement.This petrol motor is qualified.
Show: novel alloy cylinder body working heat good stability, heat distortion amount is little; Under etches such as water, oil, steam, erosion resistance is preferably arranged; Has good fatigue resistance;
Working reliability bench testing in 500 hours: the GYL-1 cylinder body is in being assembled in the engine process, each component parts size no-float, through being assembled in JL472Q, JL474Q motoring run break-in inspection, do not find quality problems, after go through the test of 500 hours bed runs, the cylinder body working condition is normal, and seepage (oil, water) phenomenon does not take place, and running of an engine is good.After finishing, bench testing checks that the cylinder surface state is complete good.The crankcase planeness, the detected result of participating in the test front and back all meets the requirement of product design drawing, and abrasion loss shows novel alloy cylinder body good thermal stability in specialized range.Bench testing finishes in addition, and the crankcase cylinders bore dia is detected in the back, circle (post) degree detects, and abrasion loss is normal substantially.This is serious test to cylinder head with the thermal property of material.
The entrucking road operation test: the engine of GYL-1 cylinder body assembling and the star that is assemblied in Chang'an carry out 25000 kilometers road post-installation reviews tests in skid pad, Hainan, come and go in the way at whole road operation test and from Chongqing to Hainan, product is working properly good, the seepage phenomenon never takes place, and situation such as crackle, engine stripping inspection after test is finished, the test products surface is complete good.Cylinder body is being participated in the actual road test front and back, and principal dimensions such as relevant cylinder bore dia, circle (post) degree all are responsible for detection by relevant departments.Detected result shows: detect crankcase cylinders bore dia, the detection of circle (post) degree after the test, abrasion loss is normal substantially.The key technical indexes is all in product technology condition specialized range.
This shows that particularly Cu, Mg control is better to its main chemical compositions (Si, Cu, Mg) for aluminum alloy materials of the present invention, its detrimental impurity element control is strict; Obtain strength of alloy σ
b〉=300Mpa has enough strength and stiffness; Dimensional stability is better; Hot strength and resistance to sudden heating preferably; The working heat good stability, heat distortion amount is little; Under etches such as water, oil, steam, erosion resistance is preferably arranged; Have good fatigue resistance, can satisfy minicar engine cylinder body high-pressure casting technology and mechanical processing technique.The cost of alloy is low simultaneously.
Embodiment
Embodiment 1: one, batching composition
Batching is by following formula: W
i=A
i/ (1-E
i%) Wt calculates, in the formula:
A
iThe content X of each element in the alloy
i(%wt);
E
iThe burn out rate of each element during melting, it is as shown in the table;
The gross weight of Wt institute molten alloy;
W
iThe weight of each element in the melting once gross weight;
Melting loss of elements rate according to the form below:
Element aluminum silicon magnesium copper titanium
E
i(％〕3???1???15???5????15
Two, select following raw and auxiliary material for use: (if preparing 100 kilograms of alloys)
Aluminium ingot: 87 kilograms of industrial rafifinals;
Silicon: 11 kilograms of 1# silicon metals;
Master alloy: Al-50%Cu5 kilogram;
0.4 kilogram of metal pure magnesium ingot;
1 kilogram of refining agent and 0.5 kilogram of the agent of skimming etc.
Three, melting technology
The first step: adopt 20～30% talcum powder+5% water glass+suitable quantity of water and become coating;
Second step: all melting instruments are all in 250 ℃ of left and right sides paints and oven dry, in case increase iron in the fusion process;
The 3rd step: crucible is preheating to garnet, then the aluminium ingot after preheating is got 2/3 (58 kilograms) and put into crucible and melt;
The 4th step: when aluminium ingot is fused into starchiness, the silicon metal through preheating is pressed in the aluminium liquid for 9 kilograms, and 1/3 (29 kilograms) aluminium ingot of remainder is joined in the crucible, suppress the come-up of silicon;
The 5th step: material to be added all after the fusing, adds Al-Cu5 kilogram master alloy again, moltenly stirs after clear;
The 6th step: in 730 ℃ carry out refining at twice, skim after, rapidly 0.3 kilogram of MAG block is pressed in the aluminium liquid, molten skimming after clear left standstill 5～10min and got final product casting ingot-forming.
The Chemical Composition (mass percent) of the alloy material that obtains by above-mentioned technology is:
Cu?2.30、Si?10.90、Mg0.28、Zn?0.80、Fe?0.5、Mn0.17、Al?85.77、Ni0.06、Sb0.02。
Claims (2)
1, a kind of minicar engine cylinder body aluminium diecast alloy is characterized in that: the percentage composition of main chemical compositions is Cu1.5-3.0%, Si10.0-12.0%, Ng0.15-0.35%, the Al surplus, and all the other are impurity, strength of alloy σ
b〉=300MP
2, minicar engine cylinder body aluminium diecast alloy according to claim 1 is characterized in that the percentage composition of described impurity is: Zn≤0.90%, Fe≤0.90, Mn≤0.40%, Ni≤0.40%, Sn≤0.10%, Pb≤0.10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031178340A CN1483847A (en) | 2003-05-07 | 2003-05-07 | Pressure casting aluminium aluminium alloy for cylinder of minicar engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031178340A CN1483847A (en) | 2003-05-07 | 2003-05-07 | Pressure casting aluminium aluminium alloy for cylinder of minicar engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1483847A true CN1483847A (en) | 2004-03-24 |
Family
ID=34152711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031178340A Pending CN1483847A (en) | 2003-05-07 | 2003-05-07 | Pressure casting aluminium aluminium alloy for cylinder of minicar engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1483847A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101539064B (en) * | 2009-04-08 | 2011-01-19 | 重庆三华工业有限公司 | Aluminum alloy engine crankcase without cylinder sleeve |
| CN102688998A (en) * | 2012-05-30 | 2012-09-26 | 太仓海嘉车辆配件有限公司 | Method for producing double-clutch valve |
| CN102703774A (en) * | 2012-06-27 | 2012-10-03 | 贵阳华烽有色铸造有限公司 | Cast aluminum alloy |
| CN102896291A (en) * | 2012-10-09 | 2013-01-30 | 广州金邦有色合金有限公司 | Front cover of car air conditioner compressor FS170C and casting method of front cover |
| CN103243246A (en) * | 2013-05-24 | 2013-08-14 | 怡球金属资源再生（中国）股份有限公司 | High-quality and high-hardness aluminum alloy ingot and production method thereof |
| CN105420561A (en) * | 2015-12-11 | 2016-03-23 | 天津爱田汽车部件有限公司 | High-strength die-cast aluminum alloy |
| CN106756296A (en) * | 2016-12-20 | 2017-05-31 | 重庆顺博铝合金股份有限公司 | Aluminium alloy and preparation method thereof for preparing engine cylinder-body |
| US9669459B2 (en) | 2012-10-26 | 2017-06-06 | Ford Motor Company | System and method of making a cast part |
| CN109234582A (en) * | 2018-08-29 | 2019-01-18 | 安徽工程大学 | A kind of engine cylinder body high-intensity and high-tenacity aluminum alloy materials and preparation method thereof |
| CN109234581A (en) * | 2018-08-29 | 2019-01-18 | 安徽工程大学 | A kind of engine cylinder body silumin material and preparation method thereof |
| CN109536788A (en) * | 2018-12-04 | 2019-03-29 | 合肥江淮铸造有限责任公司 | Lightweight pack alloy cylinder body moulding process |
| CN114058913A (en) * | 2021-10-15 | 2022-02-18 | 宁波东浩铸业有限公司 | Automobile generator shell and injection process thereof |
-
2003
- 2003-05-07 CN CNA031178340A patent/CN1483847A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101539064B (en) * | 2009-04-08 | 2011-01-19 | 重庆三华工业有限公司 | Aluminum alloy engine crankcase without cylinder sleeve |
| CN102688998A (en) * | 2012-05-30 | 2012-09-26 | 太仓海嘉车辆配件有限公司 | Method for producing double-clutch valve |
| CN102688998B (en) * | 2012-05-30 | 2013-07-31 | 太仓海嘉车辆配件有限公司 | Method for producing double-clutch valve |
| CN102703774A (en) * | 2012-06-27 | 2012-10-03 | 贵阳华烽有色铸造有限公司 | Cast aluminum alloy |
| CN102896291A (en) * | 2012-10-09 | 2013-01-30 | 广州金邦有色合金有限公司 | Front cover of car air conditioner compressor FS170C and casting method of front cover |
| US9669459B2 (en) | 2012-10-26 | 2017-06-06 | Ford Motor Company | System and method of making a cast part |
| US10266907B2 (en) | 2012-10-26 | 2019-04-23 | Ford Motor Company | System and method of making a cast part |
| CN103243246A (en) * | 2013-05-24 | 2013-08-14 | 怡球金属资源再生（中国）股份有限公司 | High-quality and high-hardness aluminum alloy ingot and production method thereof |
| CN105420561A (en) * | 2015-12-11 | 2016-03-23 | 天津爱田汽车部件有限公司 | High-strength die-cast aluminum alloy |
| CN105420561B (en) * | 2015-12-11 | 2018-03-27 | 天津爱田汽车部件有限公司 | A kind of high strength die-casting aluminum alloy |
| CN106756296A (en) * | 2016-12-20 | 2017-05-31 | 重庆顺博铝合金股份有限公司 | Aluminium alloy and preparation method thereof for preparing engine cylinder-body |
| CN109234582A (en) * | 2018-08-29 | 2019-01-18 | 安徽工程大学 | A kind of engine cylinder body high-intensity and high-tenacity aluminum alloy materials and preparation method thereof |
| CN109234581A (en) * | 2018-08-29 | 2019-01-18 | 安徽工程大学 | A kind of engine cylinder body silumin material and preparation method thereof |
| CN109536788A (en) * | 2018-12-04 | 2019-03-29 | 合肥江淮铸造有限责任公司 | Lightweight pack alloy cylinder body moulding process |
| CN114058913A (en) * | 2021-10-15 | 2022-02-18 | 宁波东浩铸业有限公司 | Automobile generator shell and injection process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1276109C (en) | Low pressure casting aluminium alloy for cylinder cap of minicar engine | |
| AU2004260006B2 (en) | Aluminum alloy for engine blocks | |
| EP1651787B1 (en) | Moulded al-si-cu aluminium alloy component with high hot-process resistance | |
| CN1483847A (en) | Pressure casting aluminium aluminium alloy for cylinder of minicar engine | |
| KR20070022610A (en) | High temperature aluminium alloy | |
| US20080060723A1 (en) | Aluminum alloy for engine components | |
| KR20200023073A (en) | A aluminum alloy and for die casting and method for manufacturing the same, die casting method | |
| JP2005264301A (en) | Casting aluminum alloy, casting of aluminum alloy and manufacturing method therefor | |
| CA2932867A1 (en) | High performance alsimgcu casting alloy | |
| EP1866452A1 (en) | Magnesium alloy | |
| EP1762631A1 (en) | Aluminum alloy excellent in wear resistance and sliding member using the same | |
| JP2012502176A (en) | Method of manufacturing pistons for internal combustion engines made of improved aluminum silicon alloy | |
| CN107881378B (en) | Aluminum alloy composition, aluminum alloy element, communication product and preparation method of aluminum alloy element | |
| CN1401805A (en) | Magnesium alloy and magnesium alloy element with high corrosion resistance | |
| EP2415889A1 (en) | Al-mg-si-type aluminum alloy for casting which has excellent bearing force, and casted member comprising same | |
| US11926887B2 (en) | Magnesium alloy, a piston manufactured by said magnesium alloy and a method for manufacturing said piston | |
| EP4234737A1 (en) | Aluminum alloy and component part prepared therefrom | |
| US20190062876A1 (en) | Copper alloy containing tin, method for producing same, and use of same | |
| JP4648559B2 (en) | Heat-resistant aluminum die-cast product | |
| CN1173059C (en) | Non-hardenable aluminium alloy as a semi-finished product for structures | |
| KR20110084015A (en) | Composition of cylinder block for compressor in automobile airconditioner | |
| KR20080109388A (en) | Aluminum alloy for die casting | |
| CN115612898B (en) | Aluminum alloy and parts prepared by using same | |
| KR20120007234A (en) | High-strength eutectic aluminum alloy forging process | |
| Anderson et al. | Cast Aluminum Alloy Datasheets |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: CHONGQING CHANGAN AUTOMOBILE CO.,LTD. Free format text: FORMER OWNER: CHANGAN AUTOMOBILE (GROUP) CO., LTD. Effective date: 20060811 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20060811 Address after: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Applicant after: Chongqing Changan Automobile Co., Ltd. Address before: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Applicant before: Changan Automobile (Group) Co., Ltd. |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |