CN106401806A - EGR flow guiding pipe structure - Google Patents
EGR flow guiding pipe structure Download PDFInfo
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- CN106401806A CN106401806A CN201611087762.5A CN201611087762A CN106401806A CN 106401806 A CN106401806 A CN 106401806A CN 201611087762 A CN201611087762 A CN 201611087762A CN 106401806 A CN106401806 A CN 106401806A
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- egr
- connecting hole
- pipe
- tube structure
- draft tube
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Abstract
The invention provides an EGR flow guiding pipe structure. The EGR flow guiding pipe structure comprises a flow guiding pipe, a first valve base and a second valve base; a first end of the flow guiding pipe is connected with the first valve base; the second valve base is provided with a connecting hole which penetrates the second valve base; the connecting hole and a second end of the flow guiding pipe are coaxially arranged; the second end is arranged at one end of the connecting hole, and the other end of the connecting hole is provided with a magnetic screw plug corresponding to the second end; and one side of the second valve base is provided with a gas outflow hole communicated with the connecting hole. According to the EGR flow guiding pipe structure, after gas of the EGR flow guiding pipe structure is subjected to the impurity filtering process, gas flowing out of the gas outflow hole of the second valve base has a high cleanness degree, and the impurity filtering problem is well solved when EGR gas is introduced in front of a catalytic converter; and meanwhile, condensate water is gathered at the lowest position, namely the position of a cavity above the magnetic screw plug, of the connecting hole, impurities and the condensate water can be cleared just by taking down the magnetic screw plug regularly, and therefore the water drainage problem of an EGR pipeline is well solved.
Description
Technical field
The present invention relates to technical field of engines is and in particular to a kind of EGR draft tube structure.
Background technology
EGR technology (Exhaust Gas Recirculation, EGR Technology), after referring to part is burnt
Waste gas imports inlet manifold, and sends into the interior participation burning of the cylinder of electromotor, reduces in-cylinder combustion temperature by waste gas, reduces nitrogen oxygen
The discharge of compound；Passing through to introduce waste gas additionally it is possible to optimize throttle opening simultaneously, reducing pumping loss, thus reaching fall oil consumption
Purpose.
EGR gas has two kinds from the lead-out mode of exhaust manifold, and one kind is to draw before catalyst converter, and one kind is after catalyst converter
Draw.When drawing after catalyst converter, because gas passes through the filtration of catalyst converter, typically contain less impurity, to starting
The impact of machine is less；When drawing before catalyst converter, due to the filtration without catalyst converter, now the impurity in gas is more, and
And generally have some nonflammable materials, if be introduced directly in cylinder, can cause that scuffing of cylinder bore, valve sealing be tight, piston hits
The problems such as valve, ultimately cause engine damage.Therefore, design a kind of EGR mozzle, to solve to draw EGR before catalyst converter
Contaminant filter problem during gas is necessary.
Further, since EGR gas is to introduce inlet manifold from exhaust manifold, according to the arrangement of electromotor, typically draw position
Put higher than introducing position, because gas temperature is gradually lowered, in EGR line, can there is condensed water, discharge without suitable
Path, when condensed water saves bit by bit more, can affect the negotiability of EGR line.Therefore, design a kind of EGR mozzle, to solve
The drainage problem of EGR line is also necessary.
Content of the invention
It is an object of the invention to provide a kind of EGR draft tube structure, miscellaneous during EGR gas to solve to draw before catalyst converter
Matter filtration problem and the drainage problem of EGR line.
For achieving the above object, the invention provides following technical scheme：
A kind of EGR draft tube structure, it includes mozzle, the first valve seat and the second valve seat, and the first of described mozzle
End is connected with described first valve seat；It is provided with connecting hole, described connecting hole runs through described second valve seat on described second valve seat；Institute
The second end stating connecting hole with described mozzle is coaxially disposed；Described second end is arranged on one end of described connecting hole, described company
The other end connecing hole is provided with the magnetic plug corresponding with described second end；The side of described second valve seat be provided with described
The venthole that connecting hole is connected.
Preferably, described venthole is connected with the side near described second end on described connecting hole.
Preferably, described mozzle includes being connected with described first valve seat first pipe, it is connected with described second valve seat
Second pipe；Described first pipe is obliquely installed with described second pipe, is connected by bend pipe between described first pipe and described second pipe；
Angle between the axis of the axis of described first pipe and described second pipe is between 90 degree to 180 degree.
Preferably, the axis perpendicular of the axis of described venthole and described connecting hole.
Preferably, described first pipe is provided with the first bellows segment.
Preferably, described second pipe is provided with the second bellows segment.
Preferably, described first valve seat is provided with installing hole, be provided with described installing hole for described first end
End face phase gear connect first installation confined planes；Be provided with described connecting hole away from one end of described magnetic plug for
The second installation confined planes that the end face phase gear at described second end connects.
Preferably, in described venthole, the one end near described connecting hole is provided with filter screen.
Preferably, described filter screen is circular configuration；The side of described filter screen is provided with for being matched with described venthole
Annular mounting plate, described filter screen is nested in described venthole by described annular mounting plate.
Preferably, in the outside wall surface of described mozzle, laser printing has gas flow to identify.
The beneficial effects of the present invention is：
The EGR draft tube structure of the present invention, its operationally, gas introduces from the first valve seat, flows through mozzle, reaches the
During two valve seats, due to the inertia of air-flow, magnetic plug can be flowed to by the second end effluent air, through parts relative analyses and
Engine rig test verifies, now the most of impurity in gas can be adsorbed by magnetic plug, and only residue fraction can not be by
The impurity of absorption；Then air-flow is after the stop by magnetic plug, it will flow to venthole, due to the effect of inertia, gas
The top wall of venthole can be flowed to, stopped by wall above this further, and when being stopped, air velocity will become
Slowly, a part of impurity in this remaining fraction impurity can fall, and is deposited in the lowest part of connecting hole, that is, magnetic plug is upper
Side, the larger impurity of another part inertia finally can directly fall in because speed reduces after once bounce-back or multiple bounce-back
The top of magnetic plug, last gas is flowed out by venthole.The EGR draft tube structure of the present invention, its gas is through above-mentioned impurity
After filter process, will have higher cleannes from the venthole effluent air of the second valve seat, preferably solve from catalysis
Contaminant filter problem during EGR gas is drawn before device；Meanwhile, condensed water also will accumulate in the extreme lower position of connecting hole, i.e. magnetic
At the top cavity of plug screw, only periodically need to unload magnetic plug it becomes possible to clear up to impurity and condensed water, thus preferably
Solve the drainage problem of EGR line, and then preferably avoid circulation that is more and leading to EGR line is saved bit by bit due to condensed water
The problem that ability declines.
Brief description
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to institute in embodiment
Need the accompanying drawing using to be briefly described, and by combining accompanying drawing, the specific embodiment of the present invention is made further specifically
Bright, wherein
Fig. 1 is the sectional view of EGR draft tube structure provided in an embodiment of the present invention；
Fig. 2 is EGR draft tube structure explosive view provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of EGR draft tube structure provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of mozzle 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 mozzle provided in an embodiment of the present invention；
Fig. 8 is the top view of filter screen provided in an embodiment of the present invention；
Fig. 9 is the side view of filter screen provided in an embodiment of the present invention.
Labelling in accompanying drawing：
11st, the first valve seat 21, the second valve seat 22, connecting hole 23, venthole
31st, magnetic plug 41, mozzle 42, bellows segment 43, first end 44, the second end
51st, gas flow 61, filter screen 62, annular mounting plate 71, first pipe
72nd, second pipe 73, bend pipe 74, arc section 75, straightway H, maximum height
T, axial width S, spacing K, internal diameter
Specific embodiment
In order that those skilled in the art more fully understand technical scheme, below in conjunction with specific embodiment pair
This programme is further discussed in detail.
As shown in Figures 1 to 9, embodiments provide a kind of EGR draft tube structure, it include mozzle 41,
One valve seat 11 and the second valve seat 21, the first end 43 of mozzle 41 is connected with the first valve seat 11；It is provided with second valve seat 21
Connecting hole 22, connecting hole 22 runs through the second valve seat 21；Connecting hole 22 is coaxially disposed with the second end 44 of mozzle 41；Second end 44
It is arranged on one end of connecting hole 22, the other end of connecting hole 22 is provided with the magnetic plug 31 corresponding with the second end 44；Second
The side of valve seat 21 is provided with the venthole 23 being connected with connecting hole 22.
EGR draft tube structure provided in an embodiment of the present invention, its operationally, the guide of the gas flow 51 in such as Fig. 1
Shown, gas introduces from the first valve seat 11, flows through mozzle 41, when reaching the second valve seat 21, due to the inertia of air-flow, by second
Hold 44 effluent airs can flow to magnetic plug 31, through parts relative analyses and engine rig test checking, this seasonal epidemic pathogens
Most of impurity in body can be adsorbed by magnetic plug 31, the impurity that only remaining fraction can not be adsorbed；Then air-flow is being subject to
To after the stop 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, is stopped by wall above this further, and when being stopped, air velocity will be slack-off, this remaining fraction impurity
In a part of impurity can fall, be deposited in the lowest part of connecting hole, i.e. the top of magnetic plug, another part inertia is larger
Impurity can through once bounce-back or multiple rebound after, finally directly fall in the top of magnetic plug because speed reduces, finally
Gas is flowed out by venthole 23.The EGR draft tube structure of the present invention, its gas after above-mentioned contaminant filter process, from second
The venthole effluent air of valve seat will have higher cleannes, when preferably solving extraction EGR gas before catalyst converter
Contaminant filter problem；Meanwhile, condensed water also will accumulate in the extreme lower position of connecting hole, that is, at the top cavity of magnetic plug,
Only periodically need to unload magnetic plug it becomes possible to clear up to impurity and condensed water, thus preferably solving the row of EGR line
Water problems, and then preferably avoid and save bit by bit more due to condensed water, and lead to the problem that the negotiability of EGR line declines.
Further, venthole 23 is connected with the side near the second end 44 on connecting hole 22, thus effectively extending
Gas and magnetic plug 31 stop the path of circulation at backward venthole 23, preferably reduce impurity and are entered by connecting hole 22
Enter the probability of venthole 23, and then further increase the contaminant filter effect of this EGR draft tube structure.
As shown in Fig. 4 is to 7, in another embodiment that the present invention provides, mozzle 41 can include and the first valve seat 11
Connected first pipe 71, the second pipe 72 being connected with the second valve seat 21；First pipe 71 is obliquely installed with second pipe 72, first pipe 71
It is connected by bend pipe 73 between second pipe 72；Angle between the axis of the axis of first pipe 71 and second pipe 72 is at 90 degree extremely
Between 180 degree.So can make by this kind of mozzle 41 that gas is more smooth advantageously to be flowed in the second valve seat 21, further
Improve the negotiability of EGR line.
Specifically, the axis of venthole 23 can be with the axis perpendicular of connecting hole 22.Now a part of inertia is larger
Impurity can be after once bounce-back or multiple bounce-back, and final speed reduces, and falls in the bottom wall of venthole 23, then suitable
This bottom wall landing to the top of magnetic plug 31 in connecting hole 22, thus reduce further impurity being flowed by venthole 23
The probability going out is so that the contaminant filter performance of this EGR draft tube structure has obtained greatly improving.
Further, first pipe 71 can be provided with the first bellows segment.Now mozzle 41 will have certain soft
Property, when the connection status of mozzle 41 and the first valve seat 11 and the second valve seat 21 is bad, this mozzle 41 will have and play one
Fixed Space adjustment effect it is ensured that the good seal of mozzle 41 and the first valve seat 11 and mozzle 41 and the second valve seat 21,
Thus being effectively prevented from gas leakage, simultaneously because now the rigidity of mozzle 41 also decreases so that mozzle 41 is less prone to
The situation of fracture.
In order that this mozzle 41 has preferably flexibility and more preferably Space adjustment function, second pipe 72 can be arranged
There is the second bellows segment.It should be noted that the ripple struction of the first bellows segment and the second bellows segment all can by arc section 74 and
The straightway 75 that the two ends of arc section 74 are connected is formed；In first bellows segment, the number of ripple struction can be 4, each ripple
Structure is distributed on the bearing of trend of the first bellows segment；In second bellows segment, the number of ripple struction can be 8, each ripple knot
Structure is distributed on the bearing of trend of the second bellows segment；The wall thickness of mozzle 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 with respect to maximum height H of straightway 75 projection
Think 2.5mm, the axial width T of arc section 74 can be 3mm.
In the another embodiment that the present invention provides, the first valve seat 11 can be provided with installing hole, permissible in installing hole
It is provided with the first installation confined planes connecing for the end face phase gear with first end 43；Connecting hole away from one end of magnetic plug 31
The the second installation confined planes connecing for the end face phase gear with the second end 44 can be provided with 22.So only need to be by mozzle 41
First end 43 and the second end 44 are inserted in installing hole and connecting hole 22 respectively, and the first installation confined planes and second install confined planes will
The insertion depth of mozzle 41 can be carried out preferably spacing, can also ensure that mozzle 41 and the first valve seat 11 and second simultaneously
Sealing between valve seat 21, then mozzle 41 can be assembled in the first valve seat 11 and the second valve seat 21 by welding manner
Together.
As shown in Figure 8 and Figure 9, in venthole 23, the one end near connecting hole 22 can be provided with filter screen 61, thus passing through
The setting of filter screen 61 can be lowered into the quantity of the impurity in venthole 23 further, and then make to be flowed out by venthole 23
Gas has higher cleannes, and the contaminant filter effect of this EGR draft tube structure is more preferable.
In order to conveniently realize the installation to filter screen 61, simultaneously facilitate and filter screen 61 is keeped in repair and changes, filter screen
It can be circular configuration；The side of filter screen 61 can be provided with the annular mounting plate 62 for matching, filter screen with venthole 23
61 are nested in venthole 23 by annular mounting plate 62.It is understood that the diameter of the diameter of filter screen and annular mounting plate
Identical；The filter screen assembly of filter screen and annular mounting plate composition can be by no pushing up hollow cylindrical steel plate with the end, and in its bottom
On uniformly get multiple filtration through holes and constitute, now its side wall is equivalent to annular mounting plate, and bottom is equivalent to filter screen, and it is strong
Degree is higher, and service life is longer.
Specifically, the outside wall surface of mozzle 41 can there is gas flow mark such that it is able to mozzle with laser printing
41 installation is preferably guided.
The above is only the preferred embodiment of the present invention it should be pointed out that these embodiments are merely to illustrate this
Invention rather than restriction the scope of the present invention, and, after having read present disclosure, relevant technical staff in the field
The present invention can be made with various changes or change, these equivalent form of values equally fall into the application appended claims and limited
Scope.
Claims (10)
1. a kind of EGR draft tube structure is it is characterised in that it includes mozzle, the first valve seat and the second valve seat, described water conservancy diversion
The first end of pipe is connected with described first valve seat；It is provided with connecting hole, described connecting hole runs through described on described second valve seat
Two valve seats；Described connecting hole is coaxially disposed with the second end of described mozzle；Described second end is arranged on the one of described connecting hole
End, the other end of described connecting hole is provided with the magnetic plug corresponding with described second end；The side of described second valve seat sets
It is equipped with the venthole being connected with described connecting hole.
2. EGR draft tube structure according to claim 1 is it is characterised in that lean on described venthole and described connecting hole
The side at closely described second end is connected.
3. EGR draft tube structure according to claim 1 is it is characterised in that described mozzle includes and described first valve
The connected first pipe of seat, the second pipe being connected with described second valve seat；Described first pipe is obliquely installed with described second pipe, described
It is connected by bend pipe between first pipe and described second pipe；Folder between the axis of the axis of described first pipe and described second pipe
Angle is between 90 degree to 180 degree.
4. EGR draft tube structure according to claim 3 is it is characterised in that the axis of described venthole and described connection
The axis perpendicular in hole.
5. EGR draft tube structure according to claim 3 is it is characterised in that be provided with the first ripple in described first pipe
Section.
6. EGR draft tube structure according to claim 5 is it is characterised in that be provided with the second ripple in described second pipe
Section.
7. EGR draft tube structure according to claim 1 is it is characterised in that be provided with installing hole on described first valve seat,
It is provided with the first installation confined planes connecing for the end face phase gear with described first end in described installing hole；Away from described magnetic spiral shell
It is provided with the second installation confined planes connecing for the end face phase gear with described second end in the described connecting hole of one end of plug.
8. EGR draft tube structure according to claim 1 is it is characterised in that near described connecting hole in described venthole
One end be provided with filter screen.
9. EGR draft tube structure according to claim 8 is it is characterised in that described filter screen is circular configuration；Described filter screen
Side be provided with annular mounting plate for matching with described venthole, it is nested that described filter screen passes through described annular mounting plate
In described venthole.
10. the EGR draft tube structure according to any one of claim 1 to 9 is it is characterised in that the outer wall of described mozzle
On face, laser printing has gas flow to identify.
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 true CN106401806A (en) | 2017-02-15 |
| CN106401806B CN106401806B (en) | 2018-09-25 |
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Family Applications (1)
| 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 |
Country Status (1)
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| CN (1) | CN106401806B (en) |
Citations (7)
| 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 |
| JP2015021442A (en) * | 2013-07-19 | 2015-02-02 | ダイハツ工業株式会社 | Piping device for internal combustion engine |
| 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 |
-
2016
- 2016-11-30 CN CN201611087762.5A patent/CN106401806B/en active Active
Patent Citations (7)
| 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 |
| JP2015021442A (en) * | 2013-07-19 | 2015-02-02 | ダイハツ工業株式会社 | Piping device for internal combustion engine |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106401806B (en) | 2018-09-25 |
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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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