CN104747323A - EGR cooling structure - Google Patents
EGR cooling structure Download PDFInfo
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- CN104747323A CN104747323A CN201510186222.1A CN201510186222A CN104747323A CN 104747323 A CN104747323 A CN 104747323A CN 201510186222 A CN201510186222 A CN 201510186222A CN 104747323 A CN104747323 A CN 104747323A
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- China
- Prior art keywords
- egr
- egr valve
- cooling structure
- attachment face
- waste gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention relates to an EGR cooling structure and belongs to the technical field of engine design and manufacturing. The structure comprises a cylinder cover, an exhaust manifold mounting face and an EGR mounting face are arranged on the cylinder cover, an EGR valve is arranged on the EGR mounting face, and an EGR connection tube is connected with the EGR valve. An internal waste channel from the exhaust manifold mounting face to the EGR valve mounting face is formed in the cylinder cover. A water outlet tube seat is arranged on one side of the downstream of the internal waste channel close to the EGR valve mounting face. By means of the structure, the temperature of waste entering an air feeding manifold is reduced, the operation temperature of the EGR valve is prevented from being too high, the valve service life is prolonged, the emission of harmful gases, in particular to NOX, is reduced, and the engine performance is improved.
Description
Technical field
The invention belongs to the technical field of engine design and manufacture, in particular, the present invention relates to a kind of EGR cooling structure.
Background technique
In the prior art, in order to reduce the combustion temperature of diesel engine and suppress the generation of NOx, there will be a known the exhaust gas recirculation system portion gas of discharging from motor being supplied to air inlet path, i.e. so-called EGR (Exhaust-GasRecirulation: Exhaust Gas recirculation) system.In the prior art, the motor of band EGR technology does not have EGR cooling scheme usually, and waste gas directly enters intake manifold after being transported to EGR valve by gas exhaust manifold by EGR pipe road.The waste gas of high temperature adds intake temperature, reduces combustion efficiency, therefore also reduces fuel economy, improves combustion temperature simultaneously, thus can not obtain the effect reducing NOx discharge fully.
Summary of the invention
In order to solve above-mentioned technical problem of the prior art, the object of the present invention is to provide a kind of EGR cooling structure.
To achieve these goals, present invention employs following technological scheme:
A kind of EGR cooling structure, comprises cylinder cap, it is characterized in that: described cylinder cap is provided with discharge manifold attachment face and EGR valve attachment face, described EGR valve attachment face is provided with EGR valve, and EGR pipe is connected to described EGR valve; Have in described cylinder cap and originate in the internal waste gas passage of discharge manifold attachment face to described EGR valve attachment face, and in the side of described internal waste gas passages downstream, described EGR valve attachment face place being provided with water outlet base.
Wherein, the cylinder cap of the opposite side of described internal waste gas passages downstream is provided with thermostat housing.
Wherein, the inwall of described internal waste gas passage is formed with resistance deposit coating.
Wherein, described resistance deposit coating is formed by low-voltage plasma spraying.
Wherein, the thickness of described resistance deposit coating is 10 ~ 50 μm.
Wherein, described spray paint is made up of the nano silicon dioxide sol of silicious marl, zirconia, germanium dioxide and surplus; And wherein the content of germanium dioxide is 1.0 ~ 5.0wt%.
Wherein, described spray paint is made up of the nano silicon dioxide sol of the silicious marl of 30 ~ 50wt%, the zirconia of 10 ~ 20wt%, the germanium dioxide of 1.0 ~ 5.0wt% and surplus.
Compared with prior art, EGR cooling structure of the present invention has following beneficial effect:
1. the exhaust gas temperature entering intake manifold is reduced.
2. avoid EGR valve body running temperature too high, extend valve body working life.
3. reduce the discharge of harmful gas especially NOx, improve engine performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the EGR cooling structure of embodiment 1.
Fig. 2 is the engine structure schematic diagram without EGR cooling scheme in prior art.
Fig. 3 is the engine structure schematic diagram with embodiment 1EGR cooling structure.
Embodiment
Below with reference to specific embodiment, EGR cooling structure of the present invention is further elaborated, has more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technological scheme.
Embodiment 1
As shown in Figure 1, EGR cooling structure described in the present embodiment, comprises cylinder cap 1, and described cylinder cap 1 is provided with discharge manifold attachment face 2 and EGR valve attachment face 6, described EGR valve attachment face is provided with EGR valve (not shown), and EGR pipe 7 is connected to described EGR valve; Have in described cylinder cap 1 and originate in the internal waste gas passage 3 of discharge manifold attachment face 2 to described EGR valve attachment face 6, and in the side in described internal waste gas passage 3 downstream, described EGR valve attachment face 6 place is provided with dotted line in water outlet base 4, figure and is depicted as the trend of waste gas.In addition, the cylinder cap of the opposite side in described internal waste gas passage 3 downstream is provided with thermostat housing 5.Carry out exchange heat by water outlet base and cooling liquid, cooled waste gas enters intake manifold by EGR valve via EGR pipe and participates in burning.In the present embodiment, the waste gas due to cooling easily forms the b horizon of short texture in internal waste gas vias inner walls, can increase particle concentration free in exhaust steam passage through accumulation and then produce unfavorable factor to the work of EGR valve.For this reason, the inwall of described internal waste gas passage is formed with resistance deposit coating by low-voltage plasma spraying, and the thickness of described resistance deposit coating is 10 ~ 50 μm.Described spray paint is made up of the nano silicon dioxide sol of the silicious marl of 30 ~ 50wt%, the zirconia of 10 ~ 20wt%, the germanium dioxide of 1.0 ~ 5.0wt% and surplus.Described spray paint before low-voltage plasma spraying through following process: first, silicious marl, zirconia and germanium dioxide are obtained d respectively through grinding
50it is the powder of 0.5 ~ 1.0 μm; Then above-mentioned powder is mixed in batch mixer, add nanometer titanium dioxide colloidal silica (the nanometer titanium dioxide colloidal silica that such as silicon dissolution method prepares, silica quality mark is 5 ~ 30wt%) and be uniformly mixed; Finally utilize spray drying process to form agglomerated particle, the diameter of particle is 5 ~ 20 μm, namely obtains described spray paint.Then the spraying of low-voltage plasma spraying method is adopted can to form described resistance deposit coating.By forming described resistance deposit coating, can be that the particle concentration of more than 0.1 μm reduces by 90 ~ 95% by particle diameter in internal waste gas passage.
As shown in Figure 2, the motor of band EGR technology of the prior art does not have EGR cooling scheme, and waste gas directly enters intake manifold 13 after being transported to EGR valve 14 by gas exhaust manifold 11 by EGR pipe 12.The waste gas of high temperature adds intake temperature, reduces combustion efficiency, therefore also reduces fuel economy, improves combustion temperature simultaneously, makes again the discharge amount of NOx increase.
As shown in Figure 3, for adopting the engine structure of embodiment's cooling scheme.By exhaust steam passage and EGR valve mounting platform are integrated in water outlet base 21 place, make waste gas streams cooled when water outlet base.The high-temp waste gas that discharge manifold 23 is discharged flows to by the passage being integrated in cylinder cap inside the EGR valve 24 being integrated in water outlet base, carry out exchange heat with the cooling liquid at water outlet base place, the waste gas after cooled enters intake manifold 25 by EGR valve 24 by EGR pipe 22 and participates in burning simultaneously.This scheme makes intake temperature improve, thus the combustion temperature reduced, decrease the discharge of harmful gas, improve engine performance, and improve the working environment of EGR valve and EGR pipe, improve its working life.
For the ordinary skill in the art; specific embodiment is just to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technological scheme is carried out; or design of the present invention and technological scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (6)
1. an EGR cooling structure, comprises cylinder cap, it is characterized in that: described cylinder cap is provided with discharge manifold attachment face and EGR valve attachment face, described EGR valve attachment face is provided with EGR valve, and EGR pipe is connected to described EGR valve; Have in described cylinder cap and originate in the internal waste gas passage of discharge manifold attachment face to described EGR valve attachment face, and in the side of described internal waste gas passages downstream, described EGR valve attachment face place being provided with water outlet base.
2. EGR cooling structure according to claim 1, is characterized in that: the cylinder cap of the opposite side of described internal waste gas passages downstream is provided with thermostat housing.
3. EGR cooling structure according to claim 1, is characterized in that: the inwall of described internal waste gas passage is formed with resistance deposit coating.
4. EGR cooling structure according to claim 3, is characterized in that: described resistance deposit coating is formed by low-voltage plasma spraying.
5. EGR cooling structure according to claim 3, is characterized in that: the thickness of described resistance deposit coating is 10 ~ 50 μm.
6. EGR cooling structure according to claim 3, is characterized in that: the spray paint for low-voltage plasma spraying is made up of the nano silicon dioxide sol of silicious marl, zirconia, germanium dioxide and surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510186222.1A CN104747323A (en) | 2015-04-17 | 2015-04-17 | EGR cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510186222.1A CN104747323A (en) | 2015-04-17 | 2015-04-17 | EGR cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104747323A true CN104747323A (en) | 2015-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510186222.1A Pending CN104747323A (en) | 2015-04-17 | 2015-04-17 | EGR cooling structure |
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| CN (1) | CN104747323A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535209U (en) * | 2009-09-25 | 2010-07-28 | 上汽通用五菱汽车股份有限公司 | EGR (exhaust gas recirculation passage) structure for cylinder head of engine |
| CN102251882A (en) * | 2010-05-07 | 2011-11-23 | 通用汽车环球科技运作有限责任公司 | Heat exchanger method and apparatus for engine exhaust gases |
| CN202500679U (en) * | 2012-01-16 | 2012-10-24 | 奇瑞汽车股份有限公司 | Engine exhaust gas recirculation system |
| CN204627799U (en) * | 2015-04-17 | 2015-09-09 | 阿尔特汽车技术股份有限公司 | EGR cooling structure |
-
2015
- 2015-04-17 CN CN201510186222.1A patent/CN104747323A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535209U (en) * | 2009-09-25 | 2010-07-28 | 上汽通用五菱汽车股份有限公司 | EGR (exhaust gas recirculation passage) structure for cylinder head of engine |
| CN102251882A (en) * | 2010-05-07 | 2011-11-23 | 通用汽车环球科技运作有限责任公司 | Heat exchanger method and apparatus for engine exhaust gases |
| CN202500679U (en) * | 2012-01-16 | 2012-10-24 | 奇瑞汽车股份有限公司 | Engine exhaust gas recirculation system |
| CN204627799U (en) * | 2015-04-17 | 2015-09-09 | 阿尔特汽车技术股份有限公司 | EGR cooling structure |
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Application publication date: 20150701 |
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| RJ01 | Rejection of invention patent application after publication |