CN203978649U - A kind of pressure relief of electric EGR valve - Google Patents
A kind of pressure relief of electric EGR valve Download PDFInfo
- Publication number
- CN203978649U CN203978649U CN201420376657.3U CN201420376657U CN203978649U CN 203978649 U CN203978649 U CN 203978649U CN 201420376657 U CN201420376657 U CN 201420376657U CN 203978649 U CN203978649 U CN 203978649U
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- CN
- China
- Prior art keywords
- copper sheathing
- rings
- egr valve
- relief
- pressure relief
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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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 discloses a kind of pressure relief of electric EGR valve, comprise that being positioned at electric EGR valve air cavity upper end is set on center-pole and presses and be fixed on the copper sheathing assembly on valve body; Described copper sheathing assembly comprises copper sheathing, two large O type silicone rubber O-rings, two teflin rings, two little O type silicone rubber O-rings, two large Shims and a minipad and four relief holes.The utility model can prevent that the seal tissue of waste gas breakthrough electric EGR valve from sealing in transmission tissue, has protected transmission part in valve not corroded, and has improved the reliability of EGR valve work, has extended the working life of EGR valve.
Description
Technical field
The utility model relates to engine exhaust emission control gear technical field, particularly the pressure relief of electric EGR valve in a kind of engine exhaust emission gas recirculation system.
Background technique
EGR valve plays the executive component effect that regulates EGR gas flow in engine exhaust-gas recirculating system.Electric EGR valve is that a kind of motor that relies on drives, and is rotated by motor driven gear, then by reducing gear, power is sent on center-pole, thereby drives center-pole to carry out linear reciprocating motion, thereby control the flow of waste gas circulation.Electric EGR valve also carries out the EGR valve of Real-time Feedback and monitor aperture by institute's belt sensor, have and control the advantages such as accurate, the response time is fast.The sensor of conventional electric EGR valve is the Hall transducer chip of contactless, has avoided conventional electric EGR valve sensor used because vibration abrasion causes the problem of sensor failure.Electric EGR valve also has good versatility, for the traffic requirement of different motors, can, according to the bore of change seat ring and spool, meet different usage requirements, has avoided repeating the economic waste of die sinking.Electric EGR valve is convenient with its assembling, and the features such as stable performance are widely used in engines exhaust gas recirculation process.
But due to the high temperature and high pressure condition of engine exhaust, electric EGR valve there will be sealing configuration to lose efficacy after work a period of time, and waste gas is broken through the seal tissue of mortor operated valve, seals in the situation of the transmission tissue of mortor operated valve.Once there is this situation, the built-in system of mortor operated valve will be corroded, and causes transmission clamping stagnation, and sensor chip is destroyed, and then EGR defective valve, and whole egr system also can be paralysed.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of and prevents that the seal tissue of waste gas breakthrough electric EGR valve from sealing in the electric EGR valve pressure relief of transmission tissue.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.
A pressure relief for electric EGR valve, comprises that being positioned at electric EGR valve air cavity upper end is set on center-pole and presses and be fixed on the copper sheathing assembly on valve body; Described copper sheathing assembly comprises copper sheathing, two large Shims, two teflin rings, two little O type silicone rubber O-rings, two large O type silicone rubber O-rings, minipad, some relief holes and is communicated with the annular gas pressure relief slot of all relief holes outer end; Described copper sheathing is circular copper sheathing, is set on center-pole, and the outer ring of circular copper sheathing is provided with two square annular grooves, and relief hole and annular gas pressure relief slot are all arranged on the copper sheathing between two each and every one square annular grooves, and the two ends up and down of copper sheathing inner ring are set to respectively shoulder hole; Described two large O type silicone rubber O-rings are placed in two square annular grooves and assemble with valve seal; Described relief hole is connected with the air hole arranging on valve body through gas pressure relief slot; Described two large Shims lay respectively at copper sheathing inner ring upper end first layer ladder and first layer ladder place, lower end; Described minipad is positioned at the second layer ladder place of copper sheathing inner ring lower end; Described two little O type silicone rubber O-rings lay respectively at the second layer ladder of copper sheathing inner ring upper end and the 3rd layer of ladder place of lower end; Described two teflin rings lay respectively at two little O type silicone rubber O-ring inner rings and center-pole sealing assembling.
Improvement of the present utility model is: described relief hole is provided with four altogether, and four relief holes become cross structure to arrange, the inner of four relief holes is communicated with copper sheathing inner via hole, and the outer end of four relief holes is connected by annular gas pressure relief slot.
Owing to having adopted above technological scheme, the obtained technological progress of the utility model is as follows.
The utility model provides a kind of pressure relief of electric EGR valve, in the middle of valve body transmission system and valve body waste gas circulation chamber, be provided with the copper sheathing assembly of double seal tissue, and be provided with relief hole between this double seal tissue, even few waste gas has broken through the first resealing under high-pressure situations, but due to the relief hole in the middle of the first resealing and the second resealing, exhaust gas pressure can be down to barometric pressure, so just cannot break through the second resealing enters in valve transmission system, protect transmission part in valve not corroded, improve the reliability of EGR valve work, extend the working life of EGR valve.
Brief description of the drawings
Accompanying drawing 1 is for being equipped with the structural representation of electric EGR valve of the present utility model;
Accompanying drawing 2 is structural representation of the present utility model.
Wherein: 1. valve body, 2. copper sheathing assembly, 21. large Shims, 22. teflin rings, 23. little O type silicone rubber O-rings, 24. large O type silicone rubber O-rings, 25. copper sheathings, 26. minipads, 27. relief holes, 28. gas pressure relief slots.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.
A kind of electric EGR valve, comprises valve body, sensor unit, transmission system and center-pole assembly.The bottom of valve body is the waste gas inlet being connected with cooler; Valve body left side is the waste gas air outlet being connected with engine air inlet tube; Waste gas inlet is provided with seat ring, is fitted into valve body by pressure-riveting process; Valve body top is the transmission system chamber of controlling switching spool.
Sensor unit contains Hall chip, is arranged on by induction the changes of magnetic field that passive tooth wheel shaft upper magnetic steel assembly produces, and the real-time aperture of reflection mortor operated valve, feeds back to ECU and complete whole closed loop control.Sensor unit is made up of the part such as Hall chip and sensor outer housing.Sensor outer housing is moulding, and the inside is contained and connected motor and the contact pin that is connected Hall chip.Hall chip is welded in sensor outer housing, and fills the black glue of unimolecule, puts into 100 DEG C of baking ovens after covering cover plate, after one hour, has taken out sensor unit.
Transmission system comprises motor assembly, transition gear and driven gear.Motor assembly is by motor pressing plate location and installation in the position place, motor hole of valve body, and motor below is provided with wavy spring, alleviates and reduces the vibratory impulse power that motor is subject to; Transition gear is located by transition gear axle, and around its central rotation, the moment of torsion that motor is produced passes to driven gear, drives driven gear to rotate around passive tooth wheel shaft.
Center-pole assembly comprises center-pole, spool, connection bent plate, connecting rod and little bearing.Spool is connected with center-pole laser bonding, forms the valve of electric EGR valve; On center-pole, be provided with 3 oil storage tanks, can store lubricating grease, ensure center-pole smooth and easy slip in copper sheathing; Connection bent plate and center-pole revolve to be riveting and connect, and pack connecting rod into; Connecting rod interference packs little bearing into, and little bearing is embedded in the eccentric chute of driven gear.
When center-pole general assembly, first the borehole jack with countersunk head step connecting on bent plate is entered on center-pole, and revolve to be riveting and connect; Again connecting rod is inserted and connected on bent plate, and revolve to be riveting and connect; Little bearing interference is fitted on connecting rod.Due to the restriction of assembly technology, spool need weld after half-finished center-pole assembly packs valve body into again.
In the electric EGR valve of the present embodiment, be also provided with pressure relief, pressure relief is arranged on structure in electric EGR valve as shown in Figure 1.
Pressure relief of the present utility model comprises copper sheathing assembly 2 and is arranged on the air hole on valve body 1.Copper sheathing assembly 2 is positioned at electric EGR valve air cavity upper end, and center-pole is sleeved in the through hole in copper sheathing assembly, and the excircle of copper sheathing assembly 2 presses and is fixed in valve body 1.
Copper sheathing assembly 2 comprises the large O type silicone rubber O-ring of copper sheathing 25, two 24, two teflin rings 22, two little O type silicone rubber O-rings 23, two large Shims 21 and a minipad 26, some relief holes 27 and annular gas pressure relief slots 28.
Wherein copper sheathing 25 is circular copper sheathing, is set on center-pole, and circular copper sheathing outer ring is provided with two square annular grooves, for two large O type silicone rubber O-rings 24 of setting-in, and by large O type silicone rubber O-ring and valve body assembling.
In the present embodiment, relief hole is provided with four altogether, and becomes cross structure to arrange, the outer end of four relief holes is all connected with annular gas pressure relief slot.Certainly, relief hole also can be set to many, and the many even cloth of relief hole are in same plane.Relief hole and annular gas pressure relief slot 28 are all arranged on the copper sheathing between two each and every one square annular grooves, as shown in Figure 2.
Air hole is arranged on the corresponding valve body in copper sheathing position between two square annular grooves, and air hole is communicated with annular gas pressure relief slot.
The two ends up and down of copper sheathing inner ring are set to respectively shoulder hole, and upper end shoulder hole is provided with two-layer ladder altogether, and lower end shoulder hole is provided with three layers of ladder altogether.
Wherein, two large O type silicone rubber O-rings 24 are placed in two square annular grooves and are connected with valve seal.Two large Shims 21 lay respectively at copper sheathing inner ring upper end first layer ladder and first layer ladder place, lower end; Minipad 26 is positioned at second layer ladder place, copper sheathing inner ring lower end; Two little O type silicone rubber O-rings 23 lay respectively at the second layer ladder of copper sheathing inner ring upper end and the 3rd layer of ladder place of lower end; Two teflin rings 22 lay respectively at the inner ring of two little O type silicone rubber O-rings 23 and assemble with center-pole sealing.
When electric EGR valve assembling, first seat ring interference is packed into after valve body positioning hole, valve body is pressed fixing.Again guide pad interference is packed in valve body, and pack the passive tooth wheel shaft of loading onto bearing and split washer into valve body, and it is fixing to press.Then put into torsion spring, the spring seat of honour is sealed in to passive tooth wheel shaft, then corresponding with the flat position on passive tooth wheel shaft with flat circle of position hole by driven gear, block the crotch above torsion spring, driven gear is revolved to turn around after half be pressed into passive tooth wheel shaft, magnet steel assembly is snapped on passive wheel shaft.Center-pole assembly is sealed in valve body drive cavity, in the corresponding little bearing eccentric chute that embeds driven gear.Copper sheathing assembly is inserted in to center-pole from valve body suction port direction, and is pressed into valve body, press fixing.Wavy spring and motor assembly are put into the corresponding aperture position of valve body successively, and load onto motor pressing plate, be fixed with two screws.Pack successively transition gear axle and transition gear into valve body again, sensor unit is fixed on valve body by 5 screws, and spool laser bonding, on center-pole, has so been completed to the assembling of whole electric EGR valve.
Electronic EGE valve in the course of the work, waste gas enters the air cavity of electric EGR valve, under high pressure conditions, a small amount of waste gas has broken through copper sheathing assembly lower end by large Shim 21, minipad 26, teflin ring 22, the first resealing that little O type silicone rubber O-ring 23 forms, enter gas pressure relief slot 28 by relief hole 27, because gas pressure relief slot 28 is corresponding with the air hole of valve body, exhaust gas pressure can be down to barometric pressure, so just cannot break through copper sheathing assembly upper end by large Shim 21, teflin ring 22, the second resealing that little O type silicone rubber O-ring 23 forms enters in valve transmission system, protect transmission part in valve not corroded, improve the reliability of EGR valve work, extend the working life of EGR valve.
Claims (2)
1. a pressure relief for electric EGR valve, is characterized in that: comprise that being positioned at electric EGR valve air cavity upper end is set on center-pole and presses and be fixed on the copper sheathing assembly (2) on valve body (1); Described copper sheathing assembly (2) comprises copper sheathing (25), two large Shims (21), two teflin rings (22), two little O type silicone rubber O-rings (23), two large O type silicone rubber O-rings (24), a minipad (26), some relief holes (27) and is communicated with the annular gas pressure relief slot (28) of all relief holes outer end;
Described copper sheathing (25) is circular copper sheathing, be set on center-pole, the outer ring of circular copper sheathing is provided with two square annular grooves, and relief hole (27) and annular gas pressure relief slot (28) are all arranged on the copper sheathing between two each and every one square annular grooves, and the two ends up and down of copper sheathing inner ring are set to respectively shoulder hole;
Described two large O type silicone rubber O-rings (24) are placed in two square annular grooves and assemble with valve seal; Described relief hole (27) is connected with the air hole arranging on valve body through gas pressure relief slot (28); Described two large Shims (21) lay respectively at copper sheathing inner ring upper end first layer ladder and first layer ladder place, lower end; Described minipad (26) is positioned at the second layer ladder place of copper sheathing inner ring lower end; Described two little O type silicone rubber O-rings (23) lay respectively at the second layer ladder of copper sheathing inner ring upper end and the 3rd layer of ladder place of lower end; Described two teflin rings (22) lay respectively at two little O type silicone rubber O-ring (23) inner rings and center-pole sealing assembling.
2. the pressure relief of a kind of electric EGR valve according to claim 1, it is characterized in that: described relief hole is provided with four altogether, article four, relief hole becomes cross structure to arrange, the inner of four relief holes is communicated with copper sheathing inner via hole, and the outer end of four relief holes is connected by annular gas pressure relief slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420376657.3U CN203978649U (en) | 2014-07-08 | 2014-07-08 | A kind of pressure relief of electric EGR valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420376657.3U CN203978649U (en) | 2014-07-08 | 2014-07-08 | A kind of pressure relief of electric EGR valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203978649U true CN203978649U (en) | 2014-12-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420376657.3U Withdrawn - After Issue CN203978649U (en) | 2014-07-08 | 2014-07-08 | A kind of pressure relief of electric EGR valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203978649U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100418A (en) * | 2014-07-08 | 2014-10-15 | 无锡隆盛科技股份有限公司 | Pressure relief structure of electric EGR (exhaust gas recirculation) valve |
-
2014
- 2014-07-08 CN CN201420376657.3U patent/CN203978649U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100418A (en) * | 2014-07-08 | 2014-10-15 | 无锡隆盛科技股份有限公司 | Pressure relief structure of electric EGR (exhaust gas recirculation) valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141203 Effective date of abandoning: 20160323 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |