CN205689320U - A kind of novel EGR valve structure - Google Patents
A kind of novel EGR valve structure Download PDFInfo
- Publication number
- CN205689320U CN205689320U CN201620696176.XU CN201620696176U CN205689320U CN 205689320 U CN205689320 U CN 205689320U CN 201620696176 U CN201620696176 U CN 201620696176U CN 205689320 U CN205689320 U CN 205689320U
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- Prior art keywords
- lower seal
- upper sealing
- plane
- valve
- valve block
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Abstract
The utility model discloses a kind of novel EGR valve structure, including valve seat and valve block, described valve seat includes being positioned at these valve seat two ends the upper sealing panel be arrangeding in parallel and lower seal plate, and the revolution sidewall that described upper sealing panel is connected with lower seal plate, cavity between described upper sealing panel and lower seal plate constitutes a pressure stabilizing cavity, and described valve block is moving up and down to be limited in described pressure stabilizing cavity；The axial line of described valve seat is provided with and runs through described upper sealing panel and pressure stabilizing cavity and the gas passage of lower seal plate, being respectively equipped with sealing inclined-plane and lower seal inclined-plane inside the upper sealing panel and lower seal plate of described gas passage, the edge of described valve block lower planes is respectively equipped with the upper sealing cone suitable with described upper sealing inclined-plane and lower seal inclined-plane and the lower seal conical surface.This utility model simple in construction, can prevent aerofluxus from impacting, it is to avoid flow reversal, improve EGR valve control accuracy and stability.
Description
Technical field
This utility model relates to engine manufacturing technology field, more specifically, it relates to a kind of novel EGR valve knot
Structure.
Background technology
EGR (waste gas recirculation) technology is one of most effective measure of the Diesel engine former machine NOx emission of reduction, light-duty
Batch application in car diesel engine and Europe 6 diesel engine；Simultaneously for gasoline engine, gas engine, EGR technology is also to improve gas
Combustion process, reduction oil consumption and the key measure of delivery temperature.The EGR valve of single valve sheet it is widely used that in egr system, by
Complicated in the actual operating mode of electromotor, and exhaust pulses change is the most greatly, EGR valve is affected by the exhaust pulses of alternation, meeting
Make EGR valve sheet bearing up-down force unstable and change is very big, so that EGR valve control stability is poor；In use, row is worked as
When pressure at expulsion is excessive in trachea, can make the EGR valve being closed that the phenomenon of " washing open " occurs, cause substantial amounts of waste gas to rush
Enter in cylinder, participate in combustion process, make burning deterioration, the thermal efficiency decline, thus show engine power deficiency, warp
Ji property and discharge are deteriorated；When the boost pressure in air inlet pipe is excessive, EGR valve can be made to be in improper duty, fresh
Pressure-air enter in exhaustor, make the amount of fresh air in entrance cylinder reduce, the air-fuel ratio decline of gaseous mixture,
Burning imperfection, dynamic property and economy decline, deterioration of emission.
Utility model content
The technical problems to be solved in the utility model is the above-mentioned deficiency for prior art, it is provided that a kind of simple in construction,
Easy to process, the control accuracy of EGR valve and the new E GR valve arrangement of stability can be improved.
The technical solution of the utility model is such that a kind of novel EGR valve structure, including valve seat and valve block, described
Valve seat include being positioned at these valve seat two ends the upper sealing panel be arrangeding in parallel and lower seal plate, and by described upper sealing panel and under
The revolution sidewall that sealing plate is connected, the cavity between described upper sealing panel and lower seal plate constitutes a pressure stabilizing cavity, described valve block
Moving up and down it is limited in described pressure stabilizing cavity；The axial line of described valve seat is provided with and runs through described upper sealing panel with steady
Pressure chamber and the gas passage of lower seal plate, be respectively equipped with inside the upper sealing panel and lower seal plate of described gas passage
Upper sealing inclined-plane and lower seal inclined-plane, the edge of described valve block lower planes is respectively equipped with and described upper sealing inclined-plane and lower seal
Upper sealing cone that inclined-plane is suitable and the lower seal conical surface.
As improving further, the end face outside of described upper sealing panel stretches out and to described valve seat axial line
Direction is bent with a location-plate, and described location-plate is provided with the through hole being coaxially disposed with described valve seat.
Further, the middle part of described valve block is provided with the valve rod being perpendicular to this valve block, described valve rod and described location-plate
On through hole suitable, and, described valve handle activity is plugged in this through hole.
Further, upper sealing cone and the lower seal conical surface of described valve block intersects in the outer edge of the two.
Further, the angle between upper sealing cone and the lower seal conical surface of described valve block is 90 °.
Further, described upper sealing inclined-plane and lower seal inclined-plane lay respectively at upper sealing panel and the appearance of lower seal plate
Inside face.
Further, the maximum gauge in the convolution face that described upper sealing inclined-plane and lower seal inclined-plane are constituted be 18mm～
35mm；Accordingly, described valve block maximum gauge is 18mm～35mm.
Beneficial effect
This utility model compared with prior art, has the advantage that
1, egr of the present utility model can form voltage stabilizing to waste gas in the cavity that volume is certain, makes on EGR valve sheet
The differing pressure of lower plane is little, and stress is relatively small, improves control accuracy and the stability of EGR, is conducive to starting
The demarcation of machine transient condition；
2, by design upper sealing panel and lower seal plate can enclosed construction up and down, it is to avoid high pressure exhaust gas washes EGR valve open, makes
Large quantity of exhaust gas enters in cylinder, causes incomplete combustion, engine performance and discharge to be deteriorated, it is also possible to avoid supercharging pressure
Power is too high, makes the fresh air of a part be entered in exhaustor by EGR valve, makes the amount of fresh air of entrance cylinder subtract
Few, cause air-fuel ratio to decline, burning deteriorates, and causes engine performance and discharge to be deteriorated；
3, EGR valve sheet is designed with the biconical surface structure of upper and lower two sealing cones, valve seat upper sealing panel and lower seal
Sealing inclined-plane two sealing cones upper and lower with valve block of plate match, and when making EGR valve sheet be in the highest and extreme lower position, all can rise
To the effect sealed, and, two sealing cones up and down on valve block intersect and angle in 90 °, and gas rises the work of guiding
With, prevent the high pressure draught high speed impact to valve block, improve the stability of valve block；
4, egr of the present utility model realizes with existing EGR engine seamless coordinating assembling, reduces the difficulty of assembling
Spend, and the maximum gauge of the upper-lower seal inclined-plane maximum gauge of EGR valve seat and valve block all controls between 18mm～35mm, makes
The range of flow expanded of EGR.
Accompanying drawing explanation
Fig. 1 is structure enlarged diagram of the present utility model；
Fig. 2 is this utility model operating diagram within the engine.
Wherein: seal on 1-valve seat, 2-valve block, 3-pressure stabilizing cavity, 4-gas passage, 5-on inclined-plane, 6-lower seal inclined-plane, 7-
Sealing cone, the 8-lower seal conical surface, 9-valve rod, 11-upper sealing panel, 12-lower seal plate, 13-revolution sidewall, 14-location-plate,
10a-cylinder, 10b-waste gas introduce pipe, 10c-EGR cooler, 10d-fresh air inlet, 10e-EGR valve.
Detailed description of the invention
This utility model is described further by the specific embodiment in below in conjunction with the accompanying drawings.
Refering to Fig. 1-2, a kind of novel EGR valve structure of the present utility model, including valve seat 1 and valve block 2, its valve seat 1 wraps
Include be positioned at these valve seat about 1 two ends and be arranged in parallel upper sealing panel 11 and lower seal plate 12 and by upper sealing panel 11 and
The revolution sidewall 13 that lower seal plate 12 is connected, the cavity between upper sealing panel 11 and lower seal plate 12 constitutes a pressure stabilizing cavity 3, its
Valve block 2 is moving up and down to be limited in this pressure stabilizing cavity 3, and the volume in its pressure stabilizing cavity 3 is fixed value, and EGR valve 10e is worked
Cheng Zhong, enters the gas of pressure stabilizing cavity 3, little at the differing pressure of valve block 2 lower planes, so that valve block 2 working stability；At valve
The axial line of seat 1 is provided with the gas passage 4 running through upper sealing panel 11 and pressure stabilizing cavity 3 and lower seal plate 12, this gas passage 4
As the access way of waste gas circulation, it is being respectively equipped with inside the upper sealing panel 11 and lower seal plate 12 of this gas passage 4
Upper sealing inclined-plane 5 and lower seal inclined-plane 6, on this, sealing inclined-plane 5 and lower seal inclined-plane 6 lay respectively at upper sealing panel 11 and lower seal
Inside plate 12 outer surface, and, its inclined-plane all extends in the middle part of the end face of upper sealing panel 11 and lower seal plate 12 opening part, this knot
The valve seat 1 of structure is not easy to damage, and improves the sealing property of valve seat 1, and stress is more preferable, effectively extends the use of valve seat 1
Life-span；The edge of its valve block 2 lower planes is respectively equipped with the upper sealing cone suitable with upper sealing inclined-plane 5 and lower seal inclined-plane 6
Face 7 and the lower seal conical surface 8, two sealing cones are symmetricly set in two planes up and down of valve block 2, and the upper-lower seal of its valve seat 1 is oblique
Face and the upper-lower seal cone match of valve block 2, seal gas passage 4, make valve block 2 be in the highest and minimum position all
The effect of sealing can be played.EGR valve 10e simple in construction of the present utility model, easy to process, improve the control essence of EGR valve 10e
Degree and the demarcation of stability, beneficially engine transient operation, can avoid high pressure exhaust gas to wash EGR valve 10e open simultaneously, makes a large amount of useless
Gas enters in cylinder 10a, causes incomplete combustion；Boost pressure can also be avoided too high, make a part of fresh air
Entering in exhaustor, make the amount of fresh air of entrance cylinder 10a reduce, cause air-fuel ratio to decline, burning deteriorates, and causes
Engine performance and discharge are deteriorated.
Stretch out in the end face outside of the upper sealing panel 11 in this utility model and be bent with to valve seat 1 direction of axis line
One location-plate 14, this location-plate 14 is provided with the through hole being coaxially disposed with valve seat 1；It is provided with at the middle part of valve block 2 and is perpendicular to this valve
The valve rod 9 of sheet 2, this valve rod 9 is suitable with the through hole on location-plate 14, and, this valve rod 9 is actively plugged in the logical of location-plate 14
In hole, its valve rod 9 play the guiding role with coordinating of through hole, prevents valve block 2 from beat occurring when moving up and down, causes EGR valve 10e
Gas leakage.
The upper sealing cone 7 of valve block 2 lower planes in this utility model and the lower seal conical surface 8 are in the outer edge of the two
Intersect, and, on it, the angle between sealing cone 7 and the lower seal conical surface 8 is 90 °, and gas can play the effect of guiding, anti-
Only stream pressure is excessive, clashes into valve block 2 and causes valve block 2 fluctuation of service, thus extends the service life of valve block 2；On it close
The maximum gauge in the convolution face that envelope inclined-plane 5 and lower seal inclined-plane 6 are constituted is 18mm～35mm；Accordingly, valve block 2 maximum gauge is
18mm～35mm, makes the range of flow expanded of EGR valve 10e.
In the present embodiment, in use, a part of waste gas of cylinder 10a discharge introduces EGR valve 10e through waste gas
Pipe 10b flows in cooler for recycled exhaust gas 10c, and the waste gas after supercooling flows in EGR valve 10e, the valve seat in EGR valve 10e 1 time
Sealing plate 12 departs from valve block 2, owing to being provided with return spring (not shown) in EGR valve 10e, when stream pressure and return bullet
When the pressure of spring balances each other, valve block 2 only can keep an applicable aperture, when the impulsive force of waste gas is excessive, makes return spring lose
During effect, valve block 2 is combined with the upper sealing panel 11 of valve seat 1 and seals gas passage 4, thus avoids big flow waste gas to enter
In cylinder 10a, cause the phenomenon that burning deteriorates；When the boost pressure after the 10d of fresh air inlet is too high, EGR valve
Valve block 2 in 10e is combined with lower seal plate 12 and seals gas passage 4, prevents a part of fresh air from blowing back into row
In trachea, the amount of fresh air that simultaneously can avoid enter into cylinder 10a reduces, and causes burning to deteriorate.
Above-described is only preferred implementation of the present utility model, it should be pointed out that come for those skilled in the art
Saying, on the premise of without departing from this utility model structure, it is also possible to make some deformation and improvement, these are all without affecting this reality
By effect and the practical applicability of novel enforcement.
Claims (7)
1. a novel EGR valve structure, including valve seat (1) and valve block (2), it is characterised in that described valve seat (1) includes position
In this valve seat (1) two ends the upper sealing panel (11) that be arranged in parallel and lower seal plate (12), and by described upper sealing panel (11)
The revolution sidewall (13) being connected with lower seal plate (12), the cavity between described upper sealing panel (11) and lower seal plate (12) is constituted
One pressure stabilizing cavity (3), described valve block (2) is moving up and down to be limited in described pressure stabilizing cavity (3)；At described valve seat (1)
Axial line is provided with the gas passage (4) running through described upper sealing panel (11) and pressure stabilizing cavity (3) and lower seal plate (12), is leaning on
The upper sealing panel (11) of nearly described gas passage (4) and lower seal plate (12) inner side be respectively equipped with sealing inclined-plane (5) and under close
Envelope inclined-plane (6), the edge of described valve block (2) lower planes is respectively equipped with and described upper sealing inclined-plane (5) and lower seal inclined-plane (6)
Suitable upper sealing cone (7) and the lower seal conical surface (8).
A kind of novel EGR valve structure the most according to claim 1, it is characterised in that at described upper sealing panel (11)
Stretch out in end face outside and be bent with a location-plate (14), described location-plate to described valve seat (1) direction of axis line
(14) through hole being coaxially disposed with described valve seat (1) it is provided with.
A kind of novel EGR valve structure the most according to claim 2, it is characterised in that the middle part of described valve block (2) is provided with
Being perpendicular to the valve rod (9) of this valve block (2), described valve rod (9) is suitable with the through hole on described location-plate (14), and, institute
The valve rod (9) stated is actively plugged in this through hole.
A kind of novel EGR valve structure the most according to claim 1, it is characterised in that the upper sealing cone of described valve block (2)
Face (7) and the lower seal conical surface (8) intersect in the outer edge of the two.
A kind of novel EGR valve structure the most according to claim 4, it is characterised in that the upper sealing cone of described valve block (2)
Angle between face (7) and the lower seal conical surface (8) is 90 °.
A kind of novel EGR valve structure the most according to claim 1, it is characterised in that described upper sealing inclined-plane (5) and
Lower seal inclined-plane (6) lays respectively at inside the outer surface of upper sealing panel (11) and lower seal plate (12).
A kind of novel EGR valve structure the most according to claim 1, it is characterised in that described upper sealing inclined-plane (5) and
The maximum gauge in the convolution face that lower seal inclined-plane (6) is constituted is 18mm～35mm；Accordingly, described valve block (2) maximum gauge
For 18mm～35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620696176.XU CN205689320U (en) | 2016-06-29 | 2016-06-29 | A kind of novel EGR valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620696176.XU CN205689320U (en) | 2016-06-29 | 2016-06-29 | A kind of novel EGR valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205689320U true CN205689320U (en) | 2016-11-16 |
Family
ID=57259396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620696176.XU Expired - Fee Related CN205689320U (en) | 2016-06-29 | 2016-06-29 | A kind of novel EGR valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205689320U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909428A (en) * | 2016-06-29 | 2016-08-31 | 广西玉柴机器股份有限公司 | Novel EGR valve structure |
-
2016
- 2016-06-29 CN CN201620696176.XU patent/CN205689320U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909428A (en) * | 2016-06-29 | 2016-08-31 | 广西玉柴机器股份有限公司 | Novel EGR valve structure |
| CN105909428B (en) * | 2016-06-29 | 2018-06-12 | 广西玉柴机器股份有限公司 | A kind of EGR valve structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161116 Termination date: 20200629 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |