CN106401806B - A kind of EGR draft tube structures - Google Patents
A kind of EGR draft tube structures Download PDFInfo
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- CN106401806B CN106401806B CN201611087762.5A CN201611087762A CN106401806B CN 106401806 B CN106401806 B CN 106401806B CN 201611087762 A CN201611087762 A CN 201611087762A CN 106401806 B CN106401806 B CN 106401806B
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- egr
- valve seat
- connecting hole
- pipe
- draft tube
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Abstract
The present invention provides a kind of EGR draft tube structures comprising diversion pipe, the first valve seat and the second valve seat, the first end of diversion pipe are connected with the first valve seat；Connecting hole is provided on second valve seat, connecting hole runs through the second valve seat；The second end of connecting hole and diversion pipe is coaxially disposed；Second end is arranged in one end of connecting hole, and the other end of connecting hole is provided with magnetic plug corresponding with second end；The side of second valve seat is provided with the venthole being connected with connecting hole.The EGR draft tube structures of the present invention, gas is after above-mentioned contaminant filter process, and the gas flowed out from the venthole of the second valve seat will have higher cleannes, contaminant filter when preferably solving the problems, such as to draw EGR gases before catalyst converter；Meanwhile condensed water also will accumulate in the extreme lower position of connecting hole, i.e., at the top cavity of magnetic plug, only need to periodically unload magnetic plug, it will be able to clear up impurity and condensed water, to preferably solve the drainage problem of EGR line.
Description
Technical field
The present invention relates to technical field of engines, and in particular to a kind of EGR draft tube structures.
Background technology
EGR technology (Exhaust Gas Recirculation, EGR Technology) refers to after part is burnt
Exhaust gas imports inlet manifold, and is sent into the cylinder of engine and participates in burning, reduces in-cylinder combustion temperature by exhaust gas, reduces nitrogen oxygen
The discharge of compound；Simultaneously by introducing exhaust gas, additionally it is possible to optimize throttle opening, pumping loss be reduced, to reach drop oil consumption
Purpose.
EGR gases are from there are two types of the lead-out modes of exhaust manifold, and one is being drawn before catalyst converter, one kind is after catalyst converter
It draws.When being drawn after catalyst converter, since gas has already passed through the filtering of catalyst converter, less impurity is typically contained, to starting
The influence of machine is smaller；When being drawn before catalyst converter, due to the filtering without catalyst converter, the impurity in gas is more at this time, and
And some nonflammable substances are usually had, if be introduced directly into cylinder, it can cause that scuffing of cylinder bore, valve sealing be tight, piston is hit
The problems such as valve, ultimately causes engine damage.Therefore, a kind of EGR diversion pipes are designed, to solve to draw EGR before catalyst converter
Contaminant filter problem when gas is necessary.
In addition, since EGR gases are to introduce inlet manifold from exhaust manifold generally to draw position according to the arrangement of engine
Condensed water can be had higher than introducing position since gas temperature continuously decreases by setting in EGR line, if without being suitably discharged
Path when condensed water saves bit by bit more, can influence the negotiability of EGR line.Therefore, a kind of EGR diversion pipes are designed, to solve
The drainage problem of EGR line is also necessary.
Invention content
The object of the present invention is to provide a kind of EGR draft tube structures, miscellaneous when extraction EGR gases before catalyst converter with solution
The drainage problem of matter filtration problem and EGR line.
To achieve the above object, the present invention provides following technical solutions：
A kind of EGR draft tube structures comprising diversion pipe, the first valve seat and the second valve seat, the first of the diversion pipe
End is connected with first valve seat；Connecting hole is provided on second valve seat, the connecting hole runs through second valve seat；Institute
The second end for stating connecting hole and the diversion pipe is coaxially disposed；The second end is arranged in one end of the connecting hole, the company
The other end for connecing hole is provided with magnetic plug corresponding with the second end；The side of second valve seat be provided with it is described
The venthole that connecting hole is connected.
Preferably, the venthole is connected with the side close to the second end on the connecting hole.
Preferably, the diversion pipe includes the first pipe being connected with first valve seat, is connected with second valve seat
Second pipe；First pipe is obliquely installed with second pipe, and first pipe is connected between second pipe by bend pipe；
Angle between the axis of first pipe and the axis of second pipe is at 90 degree between 180 degree.
Preferably, the axis perpendicular of the axis of the venthole and the connecting hole.
Preferably, it is provided with the first bellows segment on first pipe.
Preferably, it is provided with the second bellows segment on second pipe.
Preferably, be provided with mounting hole on first valve seat, be provided in the mounting hole for the first end
End face mutually keep off connect first installation confined planes；Far from the magnetic plug one end the connecting hole in be provided with for
The end face of the second end mutually keeps off the second installation confined planes connect.
Preferably, one end in the venthole close to the connecting hole is provided with strainer.
Preferably, the strainer is circular configuration；The side of the strainer is provided with for being matched with the venthole
Annular mounting plate, the strainer is nested in by the annular mounting plate in the venthole.
Preferably, laser printing has gas flow mark in the outside wall surface of the diversion pipe.
The beneficial effects of the present invention are：
The EGR draft tube structures of the present invention, at work, gas is introduced from the first valve seat, flows through diversion pipe, arrival the
When two valve seats, due to the inertia of air-flow, the gas flowed out by second end can flow to magnetic plug, by parts comparative analysis and
Engine rig test is verified, and most of impurity in gas can be adsorbed by magnetic plug at this time, and only remaining fraction cannot be by
The impurity of absorption；Then air-flow is after the blocking by magnetic plug, it will venthole is flowed to, due to the effect of inertia, gas
The top wall surface of venthole can be flowed to, further by the top, wall surface is stopped, and when being stopped, air velocity will become
Slowly, a part of impurity in the residue fraction impurity can be fallen, and be deposited in the lowest point of connecting hole, i.e., magnetic plug is upper
Side, the larger impurity of another part inertia can finally be directly fallen in because speed reduces after once rebounding or repeatedly rebounding
The top of magnetic plug, last gas are flowed out by venthole.The EGR draft tube structures of the present invention, gas pass through above-mentioned impurity
After filter process, the gas flowed out from the venthole of the second valve seat will have higher cleannes, preferably solve from catalysis
Contaminant filter problem when EGR gases is drawn before device；Meanwhile condensed water also will accumulate in the extreme lower position of connecting hole, i.e., it is magnetic
At the top cavity of plug screw, only magnetic plug need to be periodically unloaded, it will be able to clear up impurity and condensed water, to preferably
It solves the drainage problem of EGR line, and then preferably avoids since condensed water saves bit by bit circulation that is more and leading to EGR line
The problem of ability declines.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
It needs attached drawing to be used to be briefly described, and specific embodiments of the present invention will be made further specifically in conjunction with attached drawing
It is bright, wherein
Fig. 1 is the sectional view of EGR draft tube structures provided in an embodiment of the present invention；
Fig. 2 is EGR draft tube structures explosive view provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of EGR draft tube structures provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of diversion pipe provided in an embodiment of the present invention；
Fig. 5 is the enlarged drawing at A in Fig. 4；
Fig. 6 is the enlarged drawing at B in Fig. 4；
Fig. 7 is another schematic diagram of diversion pipe provided in an embodiment of the present invention；
Fig. 8 is the vertical view of strainer provided in an embodiment of the present invention；
Fig. 9 is the side view of strainer provided in an embodiment of the present invention.
It is marked in attached drawing：
11, the first valve seat 21, the second valve seat 22, connecting hole 23, venthole
31, magnetic plug 41, diversion pipe 42, bellows segment 43, first end 44, second end
51, gas flow 61, strainer 62, annular mounting plate 71, first are managed
72, the second pipe 73, bend pipe 74, arc section 75, straightway H, maximum height
T, axial width S, spacing K, internal diameter
Specific implementation mode
In order to make those skilled in the art more fully understand technical scheme of the present invention, below in conjunction with specific embodiment pair
This programme is further discussed in detail.
As shown in Figures 1 to 9, an embodiment of the present invention provides a kind of EGR draft tube structures comprising diversion pipe 41,
One valve seat 11 and the second valve seat 21, the first end 43 of diversion pipe 41 are connected with the first valve seat 11；It is provided on second valve seat 21
Connecting hole 22, connecting hole 22 run through the second valve seat 21；Connecting hole 22 and the second end 44 of diversion pipe 41 are coaxially disposed；Second end 44
It is arranged in one end of connecting hole 22, the other end of connecting hole 22 is provided with magnetic plug corresponding with second end 44 31；Second
The side of valve seat 21 is provided with the venthole 23 being connected with connecting hole 22.
EGR draft tube structures provided in an embodiment of the present invention, at work, such as the guide of the gas flow 51 in Fig. 1
Shown, gas is introduced from the first valve seat 11, flows through diversion pipe 41, when reaching the second valve seat 21, due to the inertia of air-flow, by second
The gas of 44 outflow of end can flow to magnetic plug 31, be verified by parts comparative analysis and engine rig test, at this time gas
Most of impurity in body can be adsorbed by magnetic plug 31, the impurity that only remaining fraction cannot be adsorbed；Then air-flow by
To after the blocking of magnetic plug 31, it will flow to venthole 23, due to the effect of inertia, gas can flow to the top of venthole 23
Wall surface, further by the top, wall surface is stopped, and when being stopped, air velocity will be slack-off, the residue fraction impurity
In a part of impurity can fall, be deposited in the lowest point of connecting hole, the i.e. top of magnetic plug, another part inertia is larger
Impurity finally can directly fall in the top of magnetic plug because speed reduces, finally after once rebounding or repeatedly rebounding
Gas is flowed out by venthole 23.The EGR draft tube structures of the present invention, gas is after above-mentioned contaminant filter process, from second
The gas of the venthole outflow of valve seat will have higher cleannes, when preferably solving the extraction EGR gases before catalyst converter
Contaminant filter problem；Meanwhile condensed water also will accumulate in the extreme lower position of connecting hole, i.e., at the top cavity of magnetic plug,
Only it need to periodically unload magnetic plug, it will be able to clear up impurity and condensed water, to preferably solve the row of EGR line
Water problems, so preferably avoid due to condensed water save bit by bit it is more, and cause EGR line negotiability decline the problem of.
Further, venthole 23 is connected on connecting hole 22 close to the side of second end 44, to effectively extend
Gas stop with magnetic plug 31 after to the path circulated at venthole 23, preferably reduce impurity by connecting hole 22 and into
Enter the possibility of venthole 23, and then further improves the contaminant filter effect of the EGR draft tube structures.
As shown in Fig. 4 to 7, in another embodiment provided by the invention, diversion pipe 41 may include and the first valve seat 11
Connected the first pipe 71, the second pipe 72 being connected with the second valve seat 21；First pipe 71 is obliquely installed with the second pipe 72, the first pipe 71
It is connected by bend pipe 73 between the second pipe 72；Angle between the axis of first pipe 71 and the axis of the second pipe 72 at 90 degree extremely
Between 180 degree.It can make gas is more smooth advantageously to flow into the second valve seat 21 by such diversion pipe 41 in this way, further
Improve the negotiability of EGR line.
Specifically, the axis of venthole 23 can be with the axis perpendicular of connecting hole 22.A part of inertia is larger at this time
Impurity can be after once rebounding or repeatedly rebounding, and final speed reduces, and falls in the bottom wall of venthole 23, then suitable
The top that the bottom wall slides the magnetic plug 31 into connecting hole 22, is flowed by venthole 23 to further reduced impurity
The possibility gone out so that the contaminant filter performance of the EGR draft tube structures has obtained greatly improving.
Further, the first bellows segment can be provided on the first pipe 71.Diversion pipe 41 will have centainly soft at this time
Property, when diversion pipe 41 and the connection status of the first valve seat 11 and the second valve seat 21 are bad, which, which will have, plays one
Fixed Space adjustment effect, ensures the good seal of diversion pipe 41 and the first valve seat 11 and diversion pipe 41 and the second valve seat 21,
To be effectively prevented from gas leakage, simultaneously because the rigidity of diversion pipe 41 also decreases at this time so that diversion pipe 41 is less prone to
The case where fracture.
In order to make the diversion pipe 41 have the function of preferably flexibility and more preferably Space adjustment, can be arranged on the second pipe 72
There is the second bellows segment.It should be noted that the ripple struction of the first bellows segment and the second bellows segment can by arc section 74, with
The connected straightway 75 in the both ends of arc section 74 is formed；The number of ripple struction can be 4 in first bellows segment, each ripple
Structure is distributed on the extending direction of the first bellows segment；The number of ripple struction can be 8 in second bellows segment, each ripple knot
Structure is distributed on the extending direction of the second bellows segment；The wall thickness of diversion pipe 41 can be 0.4mm, and internal diameter K can be with 11mm；Adjacent two
Interval S between the peak of arc section 74 can be 6mm, and arc section 74 can relative to the maximum height H of 75 protrusion of straightway
Think 2.5mm, the axial width T of arc section 74 can be 3mm.
In another embodiment provided by the invention, it can be provided with mounting hole on the first valve seat 11, it can be in mounting hole
It is provided with for mutually keeping off the connect first installation confined planes with the end face of first end 43；The connecting hole of one end far from magnetic plug 31
It can be provided in 22 for mutually keeping off the connect second installation confined planes with the end face of second end 44.It so only need to be by diversion pipe 41
First end 43 and second end 44 are inserted into mounting hole and connecting hole 22 respectively, and the first installation confined planes and the second installation confined planes will
The insertion depth of diversion pipe 41 can preferably be limited, while can also ensure that diversion pipe 41 and the first valve seat 11 and second
Leakproofness between valve seat 21, then diversion pipe 41 can be assembled in by welding manner and the first valve seat 11 and the second valve seat 21
Together.
As shown in Figure 8 and Figure 9, it can be provided with strainer 61 close to one end of connecting hole 22 in venthole 23, to pass through
The setting of strainer 61 can further decrease the quantity into the impurity in venthole 23, so that flowed out by venthole 23
Gas has higher cleannes, the contaminant filter effect of the EGR draft tube structures more preferable.
In order to conveniently realize the installation to strainer 61, while convenient for strainer 61 is repaired and replaced, strainer
It can be circular configuration；The side of strainer 61 can be provided with for 23 matched annular mounting plate 62 of venthole, strainer
61 are nested in by annular mounting plate 62 in venthole 23.It is understood that the diameter of strainer and the diameter of annular mounting plate
It is identical；The strainer assembly of strainer and annular mounting plate composition can be by without pushing up hollow cylindrical steel plate with the end, and in its bottom
On uniformly get multiple filtering through-holes and constitute, its side wall is strong that is, annular mounting plate, bottom are equivalent to strainer at this time
Degree is higher, and service life is longer.
Specifically, there can be gas flow mark in the outside wall surface of diversion pipe 41 with laser printing, so as to diversion pipe
41 installation is preferably oriented to.
The above is only a preferred embodiment of the present invention, it should be pointed out that these embodiments are merely to illustrate this
It invents rather than limits the scope of the invention, moreover, after having read present disclosure, relevant technical staff in the field
Various changes or modification can be made to the present invention, such equivalent forms equally fall into the application the appended claims and limited
Range.
Claims (10)
1. a kind of EGR draft tube structures comprising diversion pipe, the first valve seat and the second valve seat, the first end of the diversion pipe
It is connected with first valve seat；Connecting hole is provided on second valve seat, the connecting hole runs through second valve seat；It is described
The second end of connecting hole and the diversion pipe is coaxially disposed, which is characterized in that the second end is arranged the one of the connecting hole
End, the other end of the connecting hole are provided with magnetic plug corresponding with the second end；The side of second valve seat is set
It is equipped with the venthole being connected with the connecting hole.
2. EGR draft tube structures according to claim 1, which is characterized in that the venthole is leaned on on the connecting hole
The side of the nearly second end is connected.
3. EGR draft tube structures according to claim 1, which is characterized in that the diversion pipe includes and first valve
The first the second pipe managed, be connected with second valve seat that seat is connected；First pipe is obliquely installed with second pipe, described
First pipe is connected between second pipe by bend pipe；Folder between the axis of first pipe and the axis of second pipe
Angle is at 90 degree between 180 degree.
4. EGR draft tube structures according to claim 3, which is characterized in that the axis of the venthole and the connection
The axis perpendicular in hole.
5. EGR draft tube structures according to claim 3, which is characterized in that be provided with the first ripple on first pipe
Section.
6. EGR draft tube structures according to claim 5, which is characterized in that be provided with the second ripple on second pipe
Section.
7. EGR draft tube structures according to claim 1, which is characterized in that it is provided with mounting hole on first valve seat,
It is provided in the mounting hole for mutually keeping off the connect first installation confined planes with the end face of the first end；Far from the magnetic spiral shell
It is provided in the connecting hole of one end of plug for mutually keeping off the connect second installation confined planes with the end face of the second end.
8. EGR draft tube structures according to claim 1, which is characterized in that close to the connecting hole in the venthole
One end be provided with strainer.
9. EGR draft tube structures according to claim 8, which is characterized in that the strainer is circular configuration；The strainer
Side be provided with for the matched annular mounting plate of the venthole, it is nested that the strainer passes through the annular mounting plate
In the venthole.
10. according to claim 1 to 9 any one of them EGR draft tube structures, which is characterized in that the outer wall of the diversion pipe
Laser printing has gas flow mark on face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611087762.5A CN106401806B (en) | 2016-11-30 | 2016-11-30 | A kind of EGR draft tube structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611087762.5A CN106401806B (en) | 2016-11-30 | 2016-11-30 | A kind of EGR draft tube structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106401806A CN106401806A (en) | 2017-02-15 |
| CN106401806B true CN106401806B (en) | 2018-09-25 |
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ID=58084671
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611087762.5A Active CN106401806B (en) | 2016-11-30 | 2016-11-30 | A kind of EGR draft tube structures |
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| CN (1) | CN106401806B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10153033A1 (en) * | 2001-10-26 | 2003-05-08 | Bayerische Motoren Werke Ag | Exhaust gas re-circulation heat exchanger for liquid-cooled IC engine has exhaust/coolant openings connected to cylinder head openings via tubes easily plugged-in during connection to engine |
| CN201461145U (en) * | 2009-08-01 | 2010-05-12 | 锦州美联桥汽车部件有限公司 | Pipe for exhaust gas recirculation system |
| CN202300720U (en) * | 2011-10-30 | 2012-07-04 | 临海市伟达汽车部件有限公司 | EGR (Exhaust Gas Recirculation) pipe seat assembly |
| CN202468065U (en) * | 2011-10-30 | 2012-10-03 | 临海市伟达汽车部件有限公司 | Connecting pipe of EGR valve |
| CN203906128U (en) * | 2014-06-10 | 2014-10-29 | 安徽江淮汽车股份有限公司 | Engine exhaust gas recirculation pipe and engine exhaust gas recirculation assembly |
| CN204299729U (en) * | 2014-12-18 | 2015-04-29 | 江铃汽车股份有限公司 | A kind of waste gas circulation tubular construction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6156989B2 (en) * | 2013-07-19 | 2017-07-05 | ダイハツ工業株式会社 | Piping device for internal combustion engine |
-
2016
- 2016-11-30 CN CN201611087762.5A patent/CN106401806B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10153033A1 (en) * | 2001-10-26 | 2003-05-08 | Bayerische Motoren Werke Ag | Exhaust gas re-circulation heat exchanger for liquid-cooled IC engine has exhaust/coolant openings connected to cylinder head openings via tubes easily plugged-in during connection to engine |
| CN201461145U (en) * | 2009-08-01 | 2010-05-12 | 锦州美联桥汽车部件有限公司 | Pipe for exhaust gas recirculation system |
| CN202300720U (en) * | 2011-10-30 | 2012-07-04 | 临海市伟达汽车部件有限公司 | EGR (Exhaust Gas Recirculation) pipe seat assembly |
| CN202468065U (en) * | 2011-10-30 | 2012-10-03 | 临海市伟达汽车部件有限公司 | Connecting pipe of EGR valve |
| CN203906128U (en) * | 2014-06-10 | 2014-10-29 | 安徽江淮汽车股份有限公司 | Engine exhaust gas recirculation pipe and engine exhaust gas recirculation assembly |
| CN204299729U (en) * | 2014-12-18 | 2015-04-29 | 江铃汽车股份有限公司 | A kind of waste gas circulation tubular construction |
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| Publication number | Publication date |
|---|---|
| CN106401806A (en) | 2017-02-15 |
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Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: Hefei City, Anhui Province, 230022 East Road No. 176 Applicant before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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