CN109252934A - A kind of draining anti-corrosion type automobile exhaust pipe - Google Patents
A kind of draining anti-corrosion type automobile exhaust pipe Download PDFInfo
- Publication number
- CN109252934A CN109252934A CN201811020925.7A CN201811020925A CN109252934A CN 109252934 A CN109252934 A CN 109252934A CN 201811020925 A CN201811020925 A CN 201811020925A CN 109252934 A CN109252934 A CN 109252934A
- Authority
- CN
- China
- Prior art keywords
- parts
- fixedly connected
- offgas duct
- exhaust pipe
- automobile exhaust
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/085—Other arrangements or adaptations of exhaust conduits having means preventing foreign matter from entering exhaust conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/16—Selection of particular materials
Abstract
The present invention relates to auto parts technical fields, and disclose a kind of draining anti-corrosion type automobile exhaust pipe, the inner wall of the offgas duct is equipped with erosion shield, the inside of the erosion shield is fixedly connected with support plate, waterproof layer is equipped at the top of the support plate, incubation cavity is provided between the waterproof layer and erosion shield, the inside that copper pipe copper pipe is fixedly connected at the top of the waterproof layer is filled with liquid, and the roof inside the erosion shield is fixedly connected with heat keeper.The draining anti-corrosion type automobile exhaust pipe, it ensure that the smooth discharge of tail gas by stomata, so that heat is not easy accumulation causes the temperature difference to form condensed water, condensate return is solved the problems, such as using aperture diversion mode, support by and backing plate tilt angle by Design of Exhaust Manifold at the structure of high in and low out, so that water is not easy direct current and enter automotive interior, while the water of tail gas inside pipe wall is easier to outside effuser body, reduce the influence of condensed water, drainage performance is good.
Description
Technical field
The present invention relates to auto parts technical field, specially a kind of draining anti-corrosion type automobile exhaust pipe.
Background technique
Constantly expand recently as automobile market scale, market competition aggravation, domestic automobile parts enterprises constantly add
Big investment improves independent research, technological innovation and overseas market and opens up ability, and product competitiveness constantly enhances;In addition it is traditional at
This and price advantage, domestic automobile parts enterprises are constantly promoted in international market status, and above-mentioned factor has pushed China's automobile
Components industry sustainable growth, the competition of current auto Parts Industry both at home and abroad have not been your unselfish the primary stage having,
The new normality that you have me excellent is entered, how to have guaranteed that same tailpipe is shown one's talent on the market, is changed using scientific and technical innovation
Kind properties of product are unique approach, and the smooth implementation of this project opens boundary in international market for China's Automobile Parts Industry
Warding off soil has highly important reference.
In a vehicle, engine assembly system without suspected of its core, mainly include gas handling system, engine system and
Exhaust system three parts composition, and exhaust system mainly includes muffler and tailpipe, it is therefore necessary to automobile exhaust tail
Pipe is studied, and existing exhaust system is mostly that silencer is lying in below stringer, or is arranged in frame outside, but this
Arrangement always exists the problem of exhaust outlet is easy water inlet a bit, and exhaust pipe one end is high-temperature tail gas, and one end and cold air contact,
The condensed water being also easy to produce, exhaust pipe make surface gathered water easily enter the inside of exhaust pipe, cause corrosion muffler close to ground
And the case where inner assembly, and since automobile exhaust pipe can be contacted directly with corrosion water gas etc. for a long time, it will lead to vapour in this way
Component in vehicle exhaust pipe is corroded, and damages, and reduces the working efficiency and service life of component.So proposing a kind of row
Water anti-corrosion type automobile exhaust pipe solves the above problems.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of draining anti-corrosion type automobile exhaust pipe, has drainage effect
The advantages that good, solving existing exhaust system is mostly that silencer is lying in below stringer, or is arranged in frame outside,
But these arrangements always exist the problem of exhaust outlet is easy water inlet, and exhaust pipe one end is high-temperature tail gas, one end and cold air
Contact, the condensed water being also easy to produce, exhaust pipe make surface gathered water easily enter the inside of exhaust pipe, cause corrosion close to ground
The problem of the case where muffler and inner assembly.
(2) technical solution
In order to achieve the above object, the invention provides the following technical scheme: a kind of draining anti-corrosion type automobile exhaust pipe, including
Offgas duct, the inner wall of the offgas duct are equipped with erosion shield, and the inside of the erosion shield is fixedly connected with support plate,
It is equipped with waterproof layer at the top of the support plate, incubation cavity, the waterproof layer are provided between the waterproof layer and erosion shield
Top be fixedly connected with copper pipe, the inside of the copper pipe is filled with liquid, and the roof inside the erosion shield is fixed to be connected
It is connected to heat keeper, the bottom of the support plate has been respectively fixedly connected with sealing ring and folded plate, and the front of the folded plate successively opens up
There are multiple stomatas and multiple unhurried current mouths, baffle is fixedly connected at the top of the support plate, the inner wall bottom of the offgas duct is solid
Surely it is connected with partition, the front of the partition is fixedly connected with backing plate, offers circular hole at the corresponding folded plate in the front of the backing plate,
The bottom of the offgas duct corresponds to and offers discharge outlet at circular hole, sets between the bottom of the backing plate and the inner wall bottom of offgas duct
It is equipped with cooling chamber, the bottom of the offgas duct, which is located at below cooling chamber, offers apopore;The erosion shield is by following
The raw material of parts by weight is made: 15-30 parts of Organic fluoride filler, 1-3 parts of promotor, and 3-5 parts of plasticiser, 6-10 parts of organic solvent,
4-8 parts of bioantifouling agent, alkaline water absorbing agent 2-4 parts, 3-6 parts of corrosion inhibitor, 7-12 parts of nano-oxide particles reinforcing agent, ring
10-32 parts of oxygen resin, 1.5-3.2 parts of coalescing agent, rare earth aluminium alloy powder 1-3;Siloxanes 10-20;Compound α-ceramic 5-
8,3-7 parts of molybdenum disulfide, 2-5 parts of polyamide 612,4-6 parts of hexamethylenetetramine.
Preferably, the copper pipe and heat keeper are respectively positioned on the inside of incubation cavity, the bottom of the heat keeper and the bottom of copper pipe
Portion is in contact.
Preferably, the left and right sides of the sealing ring is fixedly connected at left and right sides of tail gas inside pipe wall respectively, the folding
Plate is located at the front of sealing ring.
Preferably, the unhurried current mouth is located at the lower section of stomata, and the quantity of the unhurried current mouth and position are corresponding with stomata.
Preferably, it is fixedly connected at the top of the top of the baffle and the inner wall of offgas duct, the incubation cavity is located at baffle
Rear.
Preferably, the support plate and the tilt angle of backing plate are 15 degree, the left side of the support plate and backing plate
Right side is in contact with the inner wall of offgas duct top and bottom respectively.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of draining anti-corrosion type automobile exhaust pipe, have it is following the utility model has the advantages that
1, the draining anti-corrosion type automobile exhaust pipe, ensure that the smooth discharge of tail gas by stomata, heat is made to be not easy to accumulate
It causes the temperature difference to form condensed water, solves the problems, such as condensate return using aperture diversion mode, support is by the tilt angle with backing plate
By Design of Exhaust Manifold at the structure of high in and low out, so that water is not easy direct current and enter automotive interior, while in offgas duct
The water of wall is easier to outside effuser body, reduces the influence of condensed water, and drainage performance is good.
2, the draining anti-corrosion type automobile exhaust pipe is not easy by the water that corrosion-resistant coating makes condensation be piled up in tube wall to offgas duct
Erosion damage is caused, heat keeper is able to maintain the low-temperature condition in incubation cavity, and cooling chamber is used for by circular hole and apopore collection polywater
Tube wall cooling, reduces the pipe inner air and outer air temperature difference, to reduce condensation vapor, improves the service life of offgas duct.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention;
Fig. 2 is the structural side view of offgas duct of the present invention.
In figure: 1 offgas duct, 2 erosion shields, 3 support plates, 4 waterproof layers, 5 incubation cavities, 6 copper pipes, 7 liquid, 8 heat keepers,
9 sealing rings, 10 folded plates, 11 stomatas, 12 unhurried current mouths, 13 baffles, 14 partitions, 15 backing plates, 16 circular holes, 17 discharge outlet, 18 cooling chambers,
19 apopores.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of draining anti-corrosion type automobile exhaust pipe referring to FIG. 1-2, including offgas duct 1, the inner wall of offgas duct 1 are equipped with
The material of erosion shield 2, erosion shield 2 is BD418 scale, and graphite is the crystal type carbon of hexagonal crystal system, is in foliaceous squama
Sheet and compact massive, physical and chemical performance is excellent, has good conductibility electric conductivity, thermal shock resistance and corrosion resistance etc., anti-corrosion
The water that erosion layer 2 makes condensation be piled up in tube wall is not easy to cause offgas duct 1 erosion damage, and the inside of erosion shield 2 is fixedly connected
Have support plate 3, be equipped with waterproof layer 4 at the top of support plate 3, waterproof layer 4 can using higher aliphatic acids mortar waterproof agent as material,
Be provided with incubation cavity 5 between waterproof layer 4 and erosion shield 2, the top of waterproof layer 4 is fixedly connected with copper pipe 6, copper pipe 6 it is interior
Portion is filled with liquid 7, and filling liquid 7 can be water, refills liquid water inside copper pipe 6 for negative pressure state and enters, inside copper pipe 6
Pressure is that the steam pressure after being evaporated by liquid 7 determines, as long as 6 surface of heating copper tube, liquid 7 will evaporate, evaporation ends steam
The temperature and pressure of vapour is all slightly higher than the other parts of tube body, therefore pressure difference is produced in tube body, promotes steam flow copper
Colder one end in pipe 6, when steam condenses on tube wall, steam releases the latent heat of vaporization, so that heat has been transmitted to condensation
End, the ring structure of copper pipe 6 makes condensed liquid 7 return evaporation ends, as long as there is heat source heating, this process will recycle into
It goes, the roof inside erosion shield 2 is fixedly connected with heat keeper 8, and copper pipe 6 and heat keeper 8 are respectively positioned on the inside of incubation cavity 5,
The bottom of heat keeper 8 and the bottom connection of copper pipe 6 touch, and the bottom of support plate 3 has been respectively fixedly connected with sealing ring 9 and folded plate 10,
The left and right sides of sealing ring 9 is fixedly connected at left and right sides of 1 inner wall of offgas duct respectively, and the front of folded plate 10 successively offers more
A stomata 11 and multiple unhurried current mouths 12, ensure that the smooth discharge of tail gas by stomata 11, so that heat is not easy accumulation and cause the temperature difference
Condensed water is formed, unhurried current mouth 12 is located at the lower section of stomata 11, and the quantity for the mouth 12 that flows slowly and position are corresponding with stomata 11, support
The top of plate 3 is fixedly connected with baffle 13, is fixedly connected at the top of the top of baffle 13 and the inner wall of offgas duct 1, incubation cavity 5 is located at
The rear of baffle 13, the inner wall bottom of offgas duct 1 are fixedly connected with partition 14, and the front of partition 14 is fixedly connected with backing plate 15,
Support plate 3 and the tilt angle of backing plate 15 are 15 degree, the right side of the left side of support plate 3 and backing plate 15 respectively with offgas duct 1
Inner wall at the top and bottom of be in contact, using aperture diversion mode solves the problems, such as condensate return, supports and incline by 3 and backing plate 15
Design of Exhaust Manifold at the structure of high in and low out, is made when automobile wading water be not easy direct current and enters automotive interior, while tail by rake angle
The water of 1 inner wall of tracheae is easier to outside effuser body, reduces the influence of condensed water, and drainage performance is good, the corresponding folding in the front of backing plate 15
Circular hole 16 is offered at plate 10, the bottom of offgas duct 1 corresponds to and offers discharge outlet 17 at circular hole 16, the bottom of backing plate 15 and tail gas
Cooling chamber 18 is provided between the inner wall bottom of pipe 1, heat keeper 8 is able to maintain the low-temperature condition in incubation cavity 5, and cooling chamber 18 passes through
Circular hole 16 and apopore 19 collect polywater and cool down for tube wall, reduce the pipe inner air and outer air temperature difference, to reduce condensation vapor, are promoted
The service life of offgas duct 1, the lower section that the bottom of offgas duct 1 is located at cooling chamber 18 offer apopore 19.
Wherein, the erosion shield 2 is prepared from the following raw materials in parts by weight: 15-30 parts of Organic fluoride filler, promotor
1-3 parts, 3-5 parts of plasticiser, 6-10 parts of organic solvent, 4-8 parts of bioantifouling agent, alkaline water absorbing agent 2-4 parts, corrosion inhibitor 3-
6 parts, 7-12 parts of nano-oxide particles reinforcing agent, 10-32 parts of epoxy resin, 1.5-3.2 parts of coalescing agent, rare earth aluminium alloy powder
1-3;Siloxanes 10-20;Compound α-ceramic 5-8,3-7 parts of molybdenum disulfide, 2-5 parts of polyamide 612, hexamethylenetetramine
4-6 parts.The work of equipment is improved so that being not easy to be corroded inside exhaust pipe by the setting of above-mentioned 2 structure of erosion shield
Efficiency, and extend its service life.
When in use, incubation cavity 5 keeps the low-temperature condition of liquid 7, flows into cooling chamber 18 by circular hole 16 or water outlet 19
Water energy enough collect polywater and cool down for tube wall, to reduce condensation vapor, 10 pairs of folded plate condensations form or splash the water shape entered
At blocking, the water gathered inside offgas duct 1 falls along unhurried current mouth 12 by 19 discharge pipe of circular hole 16, discharge outlet 17 and water outlet
Outside.
In conclusion the draining anti-corrosion type automobile exhaust pipe, ensure that the smooth discharge of tail gas by stomata 11, makes heat
Being not easy accumulation causes the temperature difference to form condensed water, solves the problems, such as condensate return using aperture diversion mode, 3 and backing plate 15 are pressed in support
Tilt angle by Design of Exhaust Manifold at the structure of high in and low out, so that water is not easy direct current and enter automotive interior, together
When 1 inner wall of offgas duct water be easier to outside effuser body, reduce the influence of condensed water, drainage performance is good, makes by corrosion-resistant coating 2
The water that condensation is piled up in tube wall is not easy to cause offgas duct 1 erosion damage, and heat keeper 8 is able to maintain the low-temperature condition in incubation cavity 5,
Cooling chamber 18 collects polywater by circular hole 16 and apopore 19 and cools down for tube wall, the pipe inner air and outer air temperature difference is reduced, to reduce
Condensation vapor improves the service life of offgas duct 1, and solving existing exhaust system is mostly that silencer is lying in stringer
Lower section, or it is arranged in frame outside, but these arrangements always exist the problem of exhaust outlet is easy water inlet, and exhaust pipe one end
For high-temperature tail gas, one end and cold air are contacted, the condensed water being also easy to produce, and exhaust pipe makes surface gathered water easily enter row close to ground
The inside of tracheae causes corrosion muffler and the problem of the case where inner assembly.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of draining anti-corrosion type automobile exhaust pipe, including offgas duct (1), it is characterised in that: the inner wall of the offgas duct (1) is spread
Equipped with erosion shield (2), the inside of the erosion shield (2) is fixedly connected with support plate (3), support plate (3) top
Portion is equipped with waterproof layer (4), is provided with incubation cavity (5), the waterproof layer between the waterproof layer (4) and erosion shield (2)
(4) it is fixedly connected at the top of copper pipe (6), the inside of the copper pipe (6) is filled with liquid (7), in the erosion shield (2)
The roof in portion is fixedly connected with heat keeper (8), and the bottom of the support plate (3) has been respectively fixedly connected with sealing ring (9) and folded plate
(10), the front of the folded plate (10) is successively provided with a plurality of air holes (11) and multiple unhurried current mouths (12), the support plate (3)
Top is fixedly connected with baffle (13), and the inner wall bottom of the offgas duct (1) is fixedly connected with partition (14), the partition (14)
Front be fixedly connected with backing plate (15), is offered circular hole (16) at the front corresponding folded plate (10) of the backing plate (15), it is described
The bottom of offgas duct (1) corresponds to be offered discharge outlet (17) at circular hole (16), bottom and offgas duct (1) of the backing plate (15)
It is provided between inner wall bottom cooling chamber (18), the bottom of the offgas duct (1), which is located at below cooling chamber (18), to be offered out
Water hole (19);The erosion shield (2) is prepared from the following raw materials in parts by weight: 15-30 parts of Organic fluoride filler, promotor 1-
3 parts, 3-5 parts of plasticiser, 6-10 parts of organic solvent, 4-8 parts of bioantifouling agent, alkaline water absorbing agent 2-4 parts, corrosion inhibitor 3-6
Part, 7-12 parts of nano-oxide particles reinforcing agent, 10-32 parts of epoxy resin, 1.5-3.2 parts of coalescing agent, rare earth aluminium alloy powder
1-3;Siloxanes 10-20;Compound α-ceramic 5-8,3-7 parts of molybdenum disulfide, 2-5 parts of polyamide 612, hexamethylenetetramine
4-6 parts.
2. a kind of draining anti-corrosion type automobile exhaust pipe according to claim 1, it is characterised in that: the copper pipe (6) and guarantor
Temperature pad (8) is respectively positioned on the inside of incubation cavity (5), and the bottom of the heat keeper (8) and the bottom connection of copper pipe (6) touch.
3. a kind of draining anti-corrosion type automobile exhaust pipe according to claim 1, it is characterised in that: the sealing ring (9)
The left and right sides is fixedly connected at left and right sides of offgas duct (1) inner wall respectively, before the folded plate (10) is located at sealing ring (9)
Side.
4. a kind of draining anti-corrosion type automobile exhaust pipe according to claim 1, it is characterised in that: unhurried current mouth (12) position
In the lower section of stomata (11), the quantity of unhurried current mouth (12) and position are corresponding with stomata (11).
5. a kind of draining anti-corrosion type automobile exhaust pipe according to claim 1, it is characterised in that: the top of the baffle (13)
It is fixedly connected at the top of portion and the inner wall of offgas duct (1), the incubation cavity (5) is located at the rear of baffle (13).
6. a kind of draining anti-corrosion type automobile exhaust pipe according to claim 1, it is characterised in that: the support plate (3) and
The tilt angle of backing plate (15) is 15 degree, the right side of the left side of the support plate (3) and backing plate (15) respectively with offgas duct
(1) it is in contact at the top and bottom of inner wall.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811020925.7A CN109252934B (en) | 2018-09-03 | 2018-09-03 | Anticorrosive type vehicle vent-pipe of drainage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811020925.7A CN109252934B (en) | 2018-09-03 | 2018-09-03 | Anticorrosive type vehicle vent-pipe of drainage |
Publications (2)
Publication Number | Publication Date |
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CN109252934A true CN109252934A (en) | 2019-01-22 |
CN109252934B CN109252934B (en) | 2020-10-16 |
Family
ID=65050527
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201811020925.7A Active CN109252934B (en) | 2018-09-03 | 2018-09-03 | Anticorrosive type vehicle vent-pipe of drainage |
Country Status (1)
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CN (1) | CN109252934B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111412054A (en) * | 2020-05-25 | 2020-07-14 | 湖州新兴汽车部件有限公司 | High-efficient water guide's blast pipe |
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CN205349492U (en) * | 2016-02-29 | 2016-06-29 | 冯玉炷 | Exhaust pipe of automobile |
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US20180106171A1 (en) * | 2016-10-17 | 2018-04-19 | Toyota Jidosha Kabushiki Kaisha | Exhaust pipe structure |
CN207454085U (en) * | 2017-09-11 | 2018-06-05 | 天津金毅诺机械制造股份有限公司 | A kind of automobile exhaust hot-end assembly structure |
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US20060123774A1 (en) * | 2004-12-10 | 2006-06-15 | Lg Electronics Inc. | Exhaust structure for engine |
JP2015178834A (en) * | 2014-03-19 | 2015-10-08 | エーバーシュペッヒャー・エグゾースト・テクノロジー・ゲーエムベーハー・ウント・コンパニー・カーゲー | Exhaust gas device |
CN203925701U (en) * | 2014-06-05 | 2014-11-05 | 张旭 | A kind of baffler that is provided with drainage channel |
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CN106870090A (en) * | 2015-12-14 | 2017-06-20 | 重庆迈酷网络科技有限责任公司 | A kind of vehicle-exhaust exhaust pipe |
CN205349492U (en) * | 2016-02-29 | 2016-06-29 | 冯玉炷 | Exhaust pipe of automobile |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN111412054A (en) * | 2020-05-25 | 2020-07-14 | 湖州新兴汽车部件有限公司 | High-efficient water guide's blast pipe |
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