CN102658815B - Vacuum energy-storing assistance system for passenger car - Google Patents
Vacuum energy-storing assistance system for passenger car Download PDFInfo
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- CN102658815B CN102658815B CN201210153901.5A CN201210153901A CN102658815B CN 102658815 B CN102658815 B CN 102658815B CN 201210153901 A CN201210153901 A CN 201210153901A CN 102658815 B CN102658815 B CN 102658815B
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- cylindrical shell
- valve seat
- cover
- vacuum
- spool
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Abstract
The invention discloses a vacuum energy-storing assistance system for a passenger car, wherein a cylinder body (1) is arranged between a vacuum assistance device (15) and an engine intake manifold (17), the lower port of the cylinder body (1) is sealed by an outer cover (2), the cylinder body (1) is internally provided with an inner cover (3), a middle cover (4), a pressure spring (5) and a plastic rubber cover (6), the upper part of the cylinder body (1) is provided with a short joint (7) and a long joint (8), the short joint (7) is connected with the vacuum assistance device (15) by a first vacuum assistance tube (14), the long joint (8) is connected with the engine intake manifold (17) by a second vacuum assistance tube (16), and the long joint (8) is internally provided with an air duct (9). According to the vacuum energy-storing assistance system, the vacuum assistance times of a braking pedal can be effectively improved, so that the braking safety and comfort can be guaranteed; therefore, the vacuum energy-storing assistance system is applicable to the passenger cars with various types such as the sedan car, the minibus and the like.
Description
Technical field
The invention belongs to automobile technical field, specifically, the particularly vacuum power accumulating force aid system on manned vehicle.
Background technology
At present, on a lot of manned vehicles, vacuum boost system is all installed, the vacuum source of this vacuum boost system is from driving engine.That is: the induction maniflod of driving engine is connected with vacuum booster by vacuum servo flexible pipe, and vacuum booster is connected with drg.In the time of engine work, driving engine air amount can produce degree of vacuum on the tube wall of induction maniflod, makes the gas flow induction maniflod in vacuum booster; In the time that engine off car load is still advanced, vacuum booster applies power-assisted by air pressure to drg, makes pin step on brake pedal lighter, to improve safety and the traveling comfort of braking.
For the manned vehicle of take up/stop system, engine off in the time of low speed, is dragged by motor, and relies on the monitoring guarantee deceleration and stopping performance to power-assisted degree of vacuum.But after flame-out, brake pedal is stepped at most three times, vacuum servo is basic forfeiture just, now just must restart driving engine, thereby increase the number of starts of driving engine, can affect the life-span of driving engine, and increase oil consumption and discharge.
For without the rise/manned vehicle of stop system, although forbid coasting with engine off, for fuel-economizing, the driving behavior of frequent neutral coasting with engine off is not within minority.Because vacuum boost system is stepped at most three times to the power-assisted of brake pedal and will be lost, the sensitieness of coasting with engine off braking is poor like this, can affect the safety of braking.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of manned vehicle vacuum power accumulating force aid system that can effectively improve vacuum servo number of times.
Technical scheme of the present invention is as follows: a kind of manned vehicle vacuum power accumulating force aid system, comprise cylindrical shell (1), enclosing cover (2), inner cap (3), middle cover (4), stage clip (5), plastics gum cover (6), short circuit head (7), lengthening joint (8), the first vacuum servo flexible pipe (14), vacuum booster (15), the second vacuum servo flexible pipe (16) and engine intake manifold (17), between described vacuum booster (15) and engine intake manifold (17), be provided with cylindrical shell (1), cylindrical shell (1) upper end closed lower end is uncovered, the lower port of this cylindrical shell (1) is sealed by enclosing cover (2), position near bottom in described cylindrical shell (1) is provided with inner cap (3) and middle cover (4), inner cap (3) is positioned at the top of middle cover (4), both are fixed together, be provided with stage clip (5) in the top of described inner cap (3), the inner roof wall butt of the upper end of stage clip (5) and cylindrical shell (1), the lower end of stage clip (5) and inner cap (3) connect, bottom in described cylindrical shell (1) is provided with plastics gum cover (6), this plastics gum cover (6) is double-decker, upper end and the outer field upper end of plastics gum cover (6) internal layer are connected as a single entity, between the internal layer of plastics gum cover (6) and skin, there is gap, the bottom of plastics gum cover (6) internal layer and inner cap (3) and middle cover (4) fix, and the outer field bottom of plastics gum cover (6) and enclosing cover (2) are fixing, short circuit head (7) and lengthening joint (8) are housed on the top of described cylindrical shell (1), the centre hole of short circuit head (7) is communicated with the inner chamber of cylindrical shell (1), and short circuit head (7) is connected with vacuum booster (15) by the first vacuum servo flexible pipe (14), the centre hole of described lengthening joint (8) is also communicated with the inner chamber of cylindrical shell (1), lengthening joint (8) is connected with engine intake manifold (17) by the second vacuum servo flexible pipe (16), in described lengthening joint (8), be provided with air passage (9), the outlet of this air passage (9) is communicated with the middle part of lengthening joint (8) centre hole, the import of air passage (9) communicates near the position of cylindrical shell (1) with lengthening joint (8) centre hole, and the import of air passage (9) can be closed by the unidirectional cone valve of installing in lengthening joint (8) centre hole.
The present invention's vacuum power accumulating device of connecting between engine intake manifold and vacuum booster, the stage clip in vacuum power accumulating device is in normal compressive state, and savings have potential energy.In the time of engine work, driving engine air amount, on the tube wall of induction maniflod, produce degree of vacuum, now the air pressure in engine intake manifold is less than the air pressure in cylindrical shell, unidirectional cone valve is opened the import of lengthening joint air passage under the effect of pressure reduction, make the gas in vacuum booster flow into cylindrical shell by short circuit head, then by lengthening joint flow direction engine induction maniflod.In the time that engine off car load is still advanced, the pressure in induction maniflod increases to barometric pressure and equates, unidirectional cone valve is closed the import of lengthening joint air passage.In the time that needs are braked, pin is stepped on brake pedal one time, vacuum booster just applies power-assisted by air pressure one time to drg, in this process, in vacuum booster, enter air, part air enters in cylindrical shell by short circuit head, stage clip is extended and discharge a part of potential energy, and volume in cylindrical shell increases, in vacuum booster, still retain higher degree of vacuum.Along with the increase that pin is stepped on brake pedal number of times, the elongation of stage clip is increasing, and the volume in cylindrical shell is also increasing, until the degree of vacuum in vacuum booster disappears completely.
By practical proof, the present invention can step on the engine off rear foot number of times of brake pedal by former being increased to 5-7 time for maximum three times.For the manned vehicle of take up/stop system, effectively reduce the number of times of restarting driving engine, extend the life-span of driving engine, and reduced oil consumption and discharge; For the manned vehicle without rise/stop system, after surprisingly or intentionally stopping working, can guarantee the sensitieness of braking, the safety that raising is braked relatively.
The upwards crimping of edge of described enclosing cover (2), the upper crimping at enclosing cover (2) edge overlaps fixing with the outer crimping of cylindrical shell (1) lower port mutually.Above structure processing and fabricating is easy, and it is firm to guarantee to be connected between enclosing cover and cylindrical shell, can strengthen again the leak tightness of junction between enclosing cover and cylindrical shell.
The upwards crimping of edge of described middle cover (4), the upper crimping at middle cover (4) edge overlaps fixing with the lower flange at inner cap (3) edge mutually.Above structure can guarantee to be connected firmly between middle cover and inner cap, reliably, both synchronisms of motion are good.
The top of described inner cap (3) is formed with the first annular boss by punching press, and the lower end of stage clip (5) is set on this first annular boss; The downward punching press of end face of described cylindrical shell (1) is formed with the second annular boss, and the upper end of stage clip (5) is set on the second annular boss.The first annular boss and the second annular boss play location and guiding to stage clip, to ensure that stage clip only does fore and aft motion at above-below direction.
All sidewalls of the skin of described plastics gum cover (6) and cylindrical shell (1) bottom are close to, the outer field bottom of plastics gum cover (6) is clamped between the upper crimping at enclosing cover (2) edge and the outer crimping of cylindrical shell (1) lower port, and the bottom of plastics gum cover (6) internal layer is clamped between the upper crimping at middle cover (4) edge and the lower flange at inner cap (3) edge.It is firm that above structure can make plastics gum cover install on the one hand, and strengthened the sealing shape between enclosing cover and cylindrical shell lower port; On the other hand, when cylindrical shell internal volume changes, without friction, reliability is secure between plastics gum cover and cylindrical shell and between middle cover and enclosing cover.
In order further to improve screen resilience, the gap between described plastics gum cover (6) internal layer and skin increases from top to bottom gradually.
Described unidirectional cone valve is by the first valve seat (10), the second valve seat (11), spool (12) and valve core spring (13) form, the first valve seat (10) and the second valve seat (11) are hollow structure, the first valve seat (10) is fixed between the import of air passage (9) and the inner end surface of lengthening joint (8), the second valve seat (11) is fixed between the import and outlet of air passage (9), spool (12) and valve core spring (13) are set between described the first valve seat (10) and the second valve seat (11), spool (12) and lengthening joint (8) bearing fit, one end of this spool (12) and the first valve seat (10) butt, the other end of spool (12) is by valve core spring (13) and the second valve seat (11) butt.Unidirectional cone valve can automatic operation under the effect of pressure reduction for above structure, to open or close as required the import of air passage, and not only sensitieness and good reliability, and can be by tight this inlet seal, to avoid gas leakage when closing air passage import.
Described spool (12) connects towards one end and first valve seat (10) of the first valve seat (10), and this end of spool (12) has central blind hole, spool (12) is formed with small boss towards one end of the second valve seat (11), and valve core spring (13) is sleeved on this small boss.Above structure can alleviate the weight of spool, makes valve core movement more flexibly, reliably; Valve core spring is located by small boss and is led, and can guarantee the patency of valve core movement, avoids spool generation jam.
Beneficial effect: the present invention can effectively improve the vacuum servo number of times to brake pedal, to guarantee safety and the traveling comfort of braking, have reasonable in design, simple in structure, implement easily, the feature such as sensitieness and good reliability, be suitable for applying on polytype manned vehicle such as small passenger car, utility van.
Brief description of the drawings
Fig. 1 is catenation principle figure of the present invention.
Fig. 2 is the longitudinal sectional view of middle cylinder body of the present invention.
Fig. 3 is the birds-eye view of Fig. 2.
Fig. 4 is the A-A cutaway view of Fig. 3.
Fig. 5 is the block diagram of middle cylinder body of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Fig. 2, Fig. 3 and Fig. 5, cylindrical shell 1 is the uncovered cylindrical structure in upper end closed lower end, and the lower port of this cylindrical shell 1 is sealed by enclosing cover 2.Upwards crimping of the edge of enclosing cover 2, the upper crimping at enclosing cover 2 edges overlaps fixing with the outer crimping of cylindrical shell 1 lower port mutually.Be provided with inner cap 3 and middle cover 4 in the interior position near bottom of described cylindrical shell 1, inner cap 3 is positioned at the top of middle cover 4, upwards crimping of the edge of middle cover 4, and the upper crimping at middle cover 4 edges overlaps fixing with the lower flange at inner cap 3 edges mutually.Top at inner cap 3 is formed with the first annular boss by punching press, the top of inner cap 3 is provided with stage clip 5, and stage clip 5 is in normal compressive state, and this stage clip 5 is positioned at cylindrical shell 1, the lower end of stage clip 5 is set on the first annular boss, and the lower end of stage clip 5 and inner cap 3 connect.The downward punching press of end face at cylindrical shell 1 is formed with the second annular boss, and the upper end of stage clip 5 is set on the second annular boss, and the inner roof wall butt of the upper end of stage clip 5 and cylindrical shell 1.
As shown in Figure 2, bottom in cylindrical shell 1 is provided with plastics gum cover 6, this plastics gum cover 6 is double-decker, there is skin and internal layer, all sidewalls of the skin of plastics gum cover 6 and cylindrical shell 1 bottom are close to, the outer field bottom of plastics gum cover 6 is clamped between the upper crimping at enclosing cover 2 edges and the outer crimping of cylindrical shell 1 lower port, and the upper end of the outer field upper end of plastics gum cover 6 and internal layer is connected as a single entity, and the bottom of plastics gum cover 6 internal layers is clamped between the upper crimping at middle cover 4 edges and the lower flange at inner cap 3 edges.Between the internal layer of described plastics gum cover 6 and skin, there is gap, and gap between plastics gum cover 6 internal layers and skin increases from top to bottom gradually.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, be provided with short circuit head 7 and lengthening joint 8 on the top of cylindrical shell 1, short circuit head 7 is positioned on the sustained height position of cylindrical shell 1 with lengthening joint 8.The inner setting-in of short circuit head 7 enters in the mounting hole on cylindrical shell 1 wall, and the centre hole of short circuit head 7 is communicated with the inner chamber of cylindrical shell 1, and between short circuit head 7 and cylindrical shell 1, seal ring is housed, to strengthen the leak tightness of junction.The inner setting-in of lengthening joint 8 enters in mounting hole corresponding on cylindrical shell 1 wall, and the centre hole of lengthening joint 8 is also communicated with the inner chamber of cylindrical shell 1.In lengthening joint 8, be provided with air passage 9, this air passage 9 is positioned at the below of lengthening joint 8 centre holes, and the outlet of air passage 9 is communicated with the middle part of lengthening joint 8 centre holes, and the import of air passage 9 communicates near the position of cylindrical shell 1 with lengthening joint 8 centre holes.
As shown in Figure 4, the unidirectional cone valve that can close air passage 9 imports is housed in the centre hole of lengthening joint 8, this unidirectional cone valve is made up of the first valve seat 10, the second valve seat 11, spool 12 and valve core spring 13, the first valve seat 10 and the second valve seat 11 are hollow structure, the first valve seat 10 is fixed between the import of air passage 9 and the inner end surface of lengthening joint 8, the second valve seat 11 is fixed between the import and outlet of air passage 9, between described the first valve seat 10 and the second valve seat 11, spool 12 and valve core spring 13 is set.Spool 12 connects towards one end and first valve seat 10 of the first valve seat 10, and this end of spool 12 has central blind hole, and spool 12 is formed with small boss towards one end of the second valve seat 11, and valve core spring 13 is sleeved on this small boss.One end of valve core spring 13 and spool 12 butts, the other end of valve core spring 13 and the second valve seat 11 butts.
As shown in Fig. 1 index map 3, Fig. 4, Fig. 5, short circuit head 7 is connected with vacuum booster 15 by the first vacuum servo flexible pipe 14, and lengthening joint 8 is connected with engine intake manifold 17 by the second vacuum servo flexible pipe 16.In the time of engine work, driving engine air amount, on the tube wall of induction maniflod 17, produce degree of vacuum, now the air pressure in engine intake manifold 17 is less than the air pressure in cylindrical shell 1, and under the effect of pressure reduction, spool 12 is to the direction motion of the second valve seat 11, valve core spring 13 is compressed, the import of lengthening joint air passage 9 is opened, and makes the gas in vacuum booster 15 flow into cylindrical shell 1 by short circuit head 7, then by lengthening joint 8 flow direction engine induction maniflods 17.In the time that engine off car load is still advanced, the pressure in induction maniflod 17 increases to barometric pressure and equates, under the screen resilience effect of valve core spring 13, spool 12, to the direction motion of the first valve seat 10, is closed the import of lengthening joint air passage 9.In the time that manned vehicle need to be braked, pin is stepped on brake pedal one time, vacuum booster 15 just applies power-assisted by air pressure one time to drg, in this process, in vacuum booster 15, enter air, part air enters in cylindrical shell 1 by short circuit head 7, makes stage clip 5 extend and discharge a part of potential energy, and volume in cylindrical shell 1 increases, in vacuum booster 15, still retain higher degree of vacuum like this.Along with the increase that pin is stepped on brake pedal number of times, the elongation of stage clip 5 is increasing, and the volume in cylindrical shell 1 is also increasing, until the degree of vacuum in vacuum booster 15 disappears completely.Structure, the principle of vacuum booster and manned vehicle vacuum-assisted brake are same as the prior art, do not repeat at this.
Although below by reference to the accompanying drawings the preferred embodiments of the present invention are described, but the invention is not restricted to above-mentioned detailed description of the invention, above-mentioned detailed description of the invention is only schematic instead of determinate, those of ordinary skill in the art is under enlightenment of the present invention, under the prerequisite without prejudice to aim of the present invention and claim, can make like multiple types and representing, as change the fixed form of cylindrical shell and enclosing cover, or change the fixed form of inner cap and middle cover, or change material and the structure of plastics gum cover, or substitute unidirectional cone valve etc. with other similar check valve, within such conversion all falls into protection scope of the present invention.
Claims (8)
1. a manned vehicle vacuum power accumulating force aid system, comprise vacuum booster (15) and engine intake manifold (17), it is characterized in that: between described vacuum booster (15) and engine intake manifold (17), be provided with cylindrical shell (1), cylindrical shell (1) upper end closed lower end is uncovered, the lower port of this cylindrical shell (1) is sealed by enclosing cover (2), position near bottom in described cylindrical shell (1) is provided with inner cap (3) and middle cover (4), inner cap (3) is positioned at the top of middle cover (4), both are fixed together, be provided with stage clip (5) in the top of described inner cap (3), the inner roof wall butt of the upper end of stage clip (5) and cylindrical shell (1), the lower end of stage clip (5) and inner cap (3) connect, bottom in described cylindrical shell (1) is provided with plastics gum cover (6), this plastics gum cover (6) is double-decker, upper end and the outer field upper end of plastics gum cover (6) internal layer are connected as a single entity, between the internal layer of plastics gum cover (6) and skin, there is gap, the bottom of plastics gum cover (6) internal layer and inner cap (3) and middle cover (4) fix, and the outer field bottom of plastics gum cover (6) and enclosing cover (2) are fixing, short circuit head (7) and lengthening joint (8) are housed on the top of described cylindrical shell (1), the centre hole of short circuit head (7) is communicated with the inner chamber of cylindrical shell (1), and short circuit head (7) is connected with vacuum booster (15) by the first vacuum servo flexible pipe (14), the centre hole of described lengthening joint (8) is also communicated with the inner chamber of cylindrical shell (1), lengthening joint (8) is connected with engine intake manifold (17) by the second vacuum servo flexible pipe (16), in described lengthening joint (8), be provided with air passage (9), the outlet of this air passage (9) is communicated with the middle part of lengthening joint (8) centre hole, the import of air passage (9) communicates near the position of cylindrical shell (1) with lengthening joint (8) centre hole, and the import of air passage (9) can be closed by the unidirectional cone valve of installing in lengthening joint (8) centre hole.
2. manned vehicle vacuum power accumulating force aid system according to claim 1, is characterized in that: the upwards crimping of edge of described enclosing cover (2), the upper crimping at enclosing cover (2) edge overlaps fixing with the outer crimping of cylindrical shell (1) lower port mutually.
3. manned vehicle vacuum power accumulating force aid system according to claim 2, is characterized in that: the upwards crimping of edge of described middle cover (4), the upper crimping at middle cover (4) edge overlaps fixing with the lower flange at inner cap (3) edge mutually.
4. manned vehicle vacuum power accumulating force aid system according to claim 3, is characterized in that: the top of described inner cap (3) is formed with the first annular boss by punching press, the lower end of stage clip (5) is set on this first annular boss; The downward punching press of end face of described cylindrical shell (1) is formed with the second annular boss, and the upper end of stage clip (5) is set on the second annular boss.
5. manned vehicle vacuum power accumulating force aid system according to claim 3, it is characterized in that: all sidewalls of the skin of described plastics gum cover (6) and cylindrical shell (1) bottom are close to, the outer field bottom of plastics gum cover (6) is clamped between the upper crimping at enclosing cover (2) edge and the outer crimping of cylindrical shell (1) lower port, and the bottom of plastics gum cover (6) internal layer is clamped between the upper crimping at middle cover (4) edge and the lower flange at inner cap (3) edge.
6. manned vehicle vacuum power accumulating force aid system according to claim 1 or 5, is characterized in that: the gap between described plastics gum cover (6) internal layer and skin increases from top to bottom gradually.
7. manned vehicle vacuum power accumulating force aid system according to claim 1, it is characterized in that: described unidirectional cone valve is by the first valve seat (10), the second valve seat (11), spool (12) and valve core spring (13) form, the first valve seat (10) and the second valve seat (11) are hollow structure, the first valve seat (10) is fixed between the import of air passage (9) and the inner end surface of lengthening joint (8), the second valve seat (11) is fixed between the import and outlet of air passage (9), spool (12) and valve core spring (13) are set between described the first valve seat (10) and the second valve seat (11), spool (12) and lengthening joint (8) bearing fit, one end of this spool (12) and the first valve seat (10) butt, the other end of spool (12) is by valve core spring (13) and the second valve seat (11) butt.
8. manned vehicle vacuum power accumulating force aid system according to claim 7, it is characterized in that: described spool (12) connects towards one end and first valve seat (10) of the first valve seat (10), and this end of spool (12) has central blind hole, spool (12) is formed with small boss towards one end of the second valve seat (11), and valve core spring (13) is sleeved on this small boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210153901.5A CN102658815B (en) | 2012-05-17 | 2012-05-17 | Vacuum energy-storing assistance system for passenger car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210153901.5A CN102658815B (en) | 2012-05-17 | 2012-05-17 | Vacuum energy-storing assistance system for passenger car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102658815A CN102658815A (en) | 2012-09-12 |
| CN102658815B true CN102658815B (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210153901.5A Expired - Fee Related CN102658815B (en) | 2012-05-17 | 2012-05-17 | Vacuum energy-storing assistance system for passenger car |
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| Country | Link |
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| CN (1) | CN102658815B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3572472A (en) * | 1969-04-21 | 1971-03-30 | Edward R Black | Emergency brake system for a vehicle |
| GB1326555A (en) * | 1969-12-05 | 1973-08-15 | Daimler Benz Ag | Diaphragm in a pressure accumulator |
| US4033308A (en) * | 1974-06-24 | 1977-07-05 | Nissan Motor Co., Ltd. | Exhaust gas recirculation control system |
| DE2640037A1 (en) * | 1976-09-06 | 1978-03-16 | Brumme Kg Effbe Werk | Sealing joint between housing sections - has ring with sealing faces at acute angle when uncompressed |
| CN102269186A (en) * | 2010-05-13 | 2011-12-07 | 株式会社万都 | Low pressure accumulator for anti-lock brake system |
| CN202686344U (en) * | 2012-05-17 | 2013-01-23 | 力帆实业(集团)股份有限公司 | Automobile vacuum energy storage assisting system |
-
2012
- 2012-05-17 CN CN201210153901.5A patent/CN102658815B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3572472A (en) * | 1969-04-21 | 1971-03-30 | Edward R Black | Emergency brake system for a vehicle |
| GB1326555A (en) * | 1969-12-05 | 1973-08-15 | Daimler Benz Ag | Diaphragm in a pressure accumulator |
| US4033308A (en) * | 1974-06-24 | 1977-07-05 | Nissan Motor Co., Ltd. | Exhaust gas recirculation control system |
| DE2640037A1 (en) * | 1976-09-06 | 1978-03-16 | Brumme Kg Effbe Werk | Sealing joint between housing sections - has ring with sealing faces at acute angle when uncompressed |
| CN102269186A (en) * | 2010-05-13 | 2011-12-07 | 株式会社万都 | Low pressure accumulator for anti-lock brake system |
| CN202686344U (en) * | 2012-05-17 | 2013-01-23 | 力帆实业(集团)股份有限公司 | Automobile vacuum energy storage assisting system |
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| Publication number | Publication date |
|---|---|
| CN102658815A (en) | 2012-09-12 |
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Address after: 400037 Chongqing city Beibei District caijiagang Zhen Tong Xing Industrial Park Fengqi Road No. 16 Patentee after: Lifan Industry (Group) Co., Ltd. Address before: 400037 Chongqing city Shapingba District No. 60 Zhangjiawan Bridge Patentee before: Lifan Industry (Group) Co., Ltd. |
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Granted publication date: 20140716 Termination date: 20210517 |