CN202108614U - Sealing structure of EGR (Exhaust Gas Recirculation) valve - Google Patents
Sealing structure of EGR (Exhaust Gas Recirculation) valve Download PDFInfo
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- CN202108614U CN202108614U CN2011201791149U CN201120179114U CN202108614U CN 202108614 U CN202108614 U CN 202108614U CN 2011201791149 U CN2011201791149 U CN 2011201791149U CN 201120179114 U CN201120179114 U CN 201120179114U CN 202108614 U CN202108614 U CN 202108614U
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- valve
- egr
- valve body
- sealing layer
- sealing
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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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Abstract
The utility model provides a sealing structure of an EGR (Exhaust Gas Recirculation) valve, which belongs to the technical field of machinery and is used for solving the problem of poor airtightness caused by an uneven contact surface between a valve plate and a valve seat of the conventional EGR valve. In the sealing structure of the EGR valve, the EGR valve comprises a valve body of which the inside is a cavity; the valve body is provided with an air inlet and an air outlet which are communicated with the cavity; a movable valve plate is arranged in a cavity body between the air inlet and the air outlet; the sealing structure is positioned between the valve body and the valve plate, and consists of a valve plate seat which projects on the inner side of the valve body and a sealing layer which is positioned on the end part of the valve plate seat; and after being moved, the valve plate can be contacted with the sealing layer and can be used for partitioning the cavity of the valve body into two independent cavities. The sealing structure has the advantages that: the valve plate seat projecting on the valve body is contacted with the valve plate, and is covered with the sealing layer made of fluorine rubber, so that the airtightness of the EGR valve is enhanced greatly.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to a kind of EGR valve, particularly a kind of sealing configuration of EGR valve.
Background technique
Exhaust gas recirculation is in engine working process, and a part of waste gas is guided to the fresh air (or mixed gas) of suction, returns cylinder interior and carries out the method that burning is participated in recirculation, and its effect is the discharge amount that is used for reducing NOx.NOx is a kind of to the great gas of human harm, and it mainly is under high-temperature oxygen-enriched condition, to generate.In the engine working process kind; As in good time, introduce part waste gas in the cylinder once more in right amount; Because of the main component CO2 specific heat ratio in the waste gas is bigger, thus the part heat absorption that waste gas can produce burning and take cylinder out of, and mixed gas is had certain diluting effect; Therefore reduce the maximum temperature and the oxygen content of engine combustion, thereby reduced the growing amount of NOx compound.
But excessive exhaust gas recirculation will influence the proper functioning of motor; Particularly when idling, the little load of the slow-speed of revolution and motor are in cold operation; And when full load required engine power performance, the waste gas of recirculation will produce serious influence to the performance of motor.Therefore, should can adjust the exhausted air quantity of participating in recirculation automatically according to the actual conditions of motor and the variation of operating conditions.Facts have proved that according to the difference of engine structure, the exhausted air quantity of participating in recirculation generally is changed to suitable between 6%～13%.
In order to make amount of exhaust gas recirculation not produce excessive influence to engine performance; The modern electro control engine has also adopted the closed loop control strategy to exhaust gas recirculation; At the exhaust gas recirculation valve place EGR valve position sensors is set, the amount of exhaust gas recirculation of reality is carried out closed loop correction feedback control.
Common EGR valve control system is mainly wealthy by EGR, suction tude, outlet pipe, closure, motor are formed.The EGR valve is installed in asking of engine air inlet tube and outlet pipe, and the EGR valve is drawn negative pressure through the pore of getting of the preceding appropriate location of closure.The valve block of control EGR valve separates with valve seat, the EGR opening of valves, and asking of engine air inlet tube and outlet pipe forms a gas-entered passageway like this.Waste gas in the outlet pipe just gets into suction tude through this passage, accomplishes exhaust gas recirculation.If in following operating mode: during engine start; During the idling contacting of TPS; When engine cooling water temperature hangs down; When engine speed surmounts certain limit; Valve block and valve seat lean, and the EGR valve cuts out, and have cut off waste gas and have got into the passage of suction tude, and egr system quits work.According to the combustion position of motor and the exhaust gas composition of generation, should rationally control the opening and closing of EGR valve.Because the valve block of EGR valve directly contacts with valve seat and controls closing of EGR valve, tend to cause the sealing of EGR valve poor because of the surface of contact out-of-flatness of valve block and valve seat.
Summary of the invention
The purpose of the utility model is to existing problem, has proposed a kind of sealing configuration that can effectively improve the EGR valve of sealing.
The purpose of the utility model can realize through following technical proposal: a kind of sealing configuration of EGR valve; The EGR valve comprises the inner valve body of cavity that is; Have the suction port and the air outlet that communicate with cavity on the valve body; Be provided with mobile valve block in the cavity between suction port and air outlet, it is characterized in that, described sealing configuration is between valve body and valve block; Sealing configuration is the valve block seat and the sealing layer that is positioned at valve block seat end of the inboard protrusion of valve body, can contact and make body cavity to be divided into two independently cavitys with sealing layer after above-mentioned valve block moves.
Mobile valve block makes it contact with valve body, and this moment, suction port and air outlet were divided into two cavitys, and the EGR valve is in closed condition; Mobile valve block makes it separate with valve body, and suction port and air outlet communicate, and the EGR valve is in open mode.Between valve body and valve block, increase the sealing configuration of forming by the valve block seat and the sealing layer of protrusion, make valve block contact closelyr, improved EGR valve sealing in off position with valve body.
In the sealing configuration of above-mentioned EGR valve, described valve block seat end has the contacting part of protrusion ringwise, and above-mentioned sealing layer covers contacting part.The contacting part of annular protrusion and valve block comprehensive engagement more easily circularize interior cavity and the outer cavity of annular with space segmentation in the valve body.
In the sealing configuration of above-mentioned EGR valve, described sealing layer is a rubber material.The sealing layer of rubber material has especially excellent elasticity, and out-of-flatness place between the two when the valve block seat that can fill up protrusion contacts with valve block has effectively improved sealing; Rubber material also has ageing-resistant preferably, winter hardiness, heat resistance and wear resistance in addition.
In the sealing configuration of above-mentioned EGR valve, described sealing layer is the fluorine rubber material.Fluorine rubber not only has the advantage of General Purpose Rubber, also has powerful oxidation corrosion resistance property, particularly ozone resistance, owing to contain NOx in the engine exhaust, so be fit to very much do the sealing layer of EGR valve.The fluorine rubber material also has the characteristic that high temperature resistant, oil resistant and the medicine of anti-the number of chemical corrode in addition, the EGR valve because high-temp waste gas will be flowed through, so EGR valve itself will can bear high temperature.
In the sealing configuration of above-mentioned EGR valve, the thickness of said sealing layer is the 0.3-0.5 millimeter.0.3-0.5 the thickness of millimeter is both wear-resisting under the minimum condition of materials, can when the valve block seat contacts with valve block, fill up out-of-flatness place between the two again.
Compared with prior art, it is the valve block seat of protrusion structure on the valve body that this sealing configuration advantage is contacted with valve block, also is coated with the sealing layer of fluorine rubber material on the valve block seat, has improved the sealing of EGR valve greatly.
Description of drawings
Fig. 1 is the partial schematic sectional view of this EGR valve.
Fig. 2 is the sealing configuration cross-sectional schematic and the partial enlarged drawing of this EGR valve.
Among the figure, 1, valve body; 2, suction port; 3, air outlet; 4, valve block; 5, valve block seat; 6, contacting part; 7, sealing layer; 8, valve rod.
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technological scheme of the utility model is done further to describe, but the utility model is not limited to these embodiments.
As shown in Figure 1, the EGR valve comprises that inside is the valve body 1 of cavity, has the suction port 2 and air outlet 3 that communicate with cavity on the valve body 1.Be provided with mobile valve block 4 in the cavity between suction port 2 and air outlet 3, valve block 4 is enclosed within on the valve rod 8, the separating or contact of valve rod 8 control valve blocks 4 and valve body 1, realizes the unlatching of EGR valve or closes.
Specifically, like Fig. 1, shown in Figure 2ly between valve body 1 and valve block 4, be provided with sealing configuration, the valve block seat 5 that comprises valve body 1 inboard protrusion with cover the sealing layer 7 on valve block seat 5 ends.Have the contacting part 6 of protrusion ringwise in valve block seat 5 ends, sealing layer 7 covers on the contacting part 6 of protrusion.Valve rod 8 pulling valve blocks 4 move and can directly contact with the sealing layer 7 on the contacting part 6, and this moment, valve block 4 was divided into two independently cavitys with valve body 1 inner chamber, and the EGR valve is in closed condition.
The sealing layer 7 of present embodiment is the fluorine rubber material, and thickness is 0.4 millimeter, and the sealing layer 7 of fluorine rubber material has the characteristic of wear-resisting acid-resistant and anti-high-temperature, makes that this EGR valve is durable in use.
Claims (5)
1. the sealing configuration of an EGR valve; The EGR valve comprises the inner valve body of cavity (1) that is; Have the suction port (2) and air outlet (3) that communicate with cavity on the valve body (1); Be provided with mobile valve block (4) in the cavity between suction port (2) and air outlet (3), it is characterized in that, described sealing configuration is positioned between valve body (1) and the valve block (4); Sealing configuration is the valve block seat (5) of the inboard protrusion of valve body (1) and the sealing layer (7) that is positioned at valve block seat (5) end, and above-mentioned valve block (4) can contact and make valve body (1) inner chamber to be divided into two independently cavitys after moving with sealing layer (7).
2. the sealing configuration of EGR valve according to claim 1 is characterized in that, described valve block seat (5) end has the contacting part (6) of protrusion ringwise, and above-mentioned sealing layer (7) covers contacting part (6).
3. the sealing configuration of EGR valve according to claim 1 and 2 is characterized in that, the thickness of said sealing layer (7) is the 0.3-0.5 millimeter.
4. the sealing configuration of EGR valve according to claim 3 is characterized in that, described sealing layer (7) is a rubber material.
5. the sealing configuration of EGR valve according to claim 4 is characterized in that, described sealing layer (7) is the fluorine rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201791149U CN202108614U (en) | 2011-05-31 | 2011-05-31 | Sealing structure of EGR (Exhaust Gas Recirculation) valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201791149U CN202108614U (en) | 2011-05-31 | 2011-05-31 | Sealing structure of EGR (Exhaust Gas Recirculation) valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202108614U true CN202108614U (en) | 2012-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201791149U Expired - Fee Related CN202108614U (en) | 2011-05-31 | 2011-05-31 | Sealing structure of EGR (Exhaust Gas Recirculation) valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202108614U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454253A (en) * | 2014-12-03 | 2015-03-25 | 无锡隆盛科技股份有限公司 | Sealing gasket structure of dual-valve-core electrically operated EGR valve |
| CN111441885A (en) * | 2019-01-17 | 2020-07-24 | 爱三工业株式会社 | EGR valve |
-
2011
- 2011-05-31 CN CN2011201791149U patent/CN202108614U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454253A (en) * | 2014-12-03 | 2015-03-25 | 无锡隆盛科技股份有限公司 | Sealing gasket structure of dual-valve-core electrically operated EGR valve |
| CN111441885A (en) * | 2019-01-17 | 2020-07-24 | 爱三工业株式会社 | EGR valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ye Yilong Inventor before: Wang Banghua Inventor before: Xue Yanjie |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG BANGHUA XUE YANJIE TO: YE YILONG |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20180531 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |