CN104100418A - Pressure relief structure of electric EGR (exhaust gas recirculation) valve - Google Patents
Pressure relief structure of electric EGR (exhaust gas recirculation) valve Download PDFInfo
- Publication number
- CN104100418A CN104100418A CN201410324663.9A CN201410324663A CN104100418A CN 104100418 A CN104100418 A CN 104100418A CN 201410324663 A CN201410324663 A CN 201410324663A CN 104100418 A CN104100418 A CN 104100418A
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- Prior art keywords
- copper sheathing
- pressure relief
- valve
- rings
- relief
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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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- Electrically Driven Valve-Operating Means (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses a pressure relief structure of an electric EGR (exhaust gas recirculation) valve. The pressure relief structure comprises a copper sleeve assembly, the copper sleeve assembly arranged at the upper end of an air cavity of the electric EGR valve sleeves a central rod, is fixedly riveted on the valve body in a pressed manner and comprises a copper sleeve, two large O-shaped silicon rubber sealing rings, two Teflon sealing rings, two small O-shaped silicon rubber sealing rings, two large thin gaskets, a small gasket and four pressure relief holes. The pressure relief structure is capable of preventing waste gas from breaking through a sealing structure of the electric EGR valve into a driving structure, so that driving parts in the valve are protected from corrosion, reliability in operation of the EGR valve is improved, and service life of the EGR valve is prolonged.
Description
Technical field
The present invention 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 dependence motor drives, and by motor driven gear, is rotated, and 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 meet different usage requirements according to the bore of change seat ring and spool, 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 object of the invention is to overcome the deficiencies in the prior art, provide a kind of and prevent 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, the technical solution used in the present invention 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 the annular gas pressure relief slot that is communicated with 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 invention 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 invention technological progress is as follows.
The invention 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, protected transmission part in valve not corroded, improved the reliability of EGR valve work, extended the working life of EGR valve.
Accompanying drawing explanation
Accompanying drawing 1 is for being equipped with the structural representation of electric EGR valve of the present invention;
Accompanying drawing 2 is structural representation of the present invention.
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 present invention is further elaborated.
An 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, by pressure-riveting process, is fitted into valve body; Valve body top is for controlling the transmission system chamber of switching spool.
Sensor unit contains Hall chip, by induction, is arranged on 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 partly comprised of Hall chip and sensor outer housing etc.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 ℃ 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 located in the position, motor hole of valve body by motor pressing plate location and installation, 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, guarantee 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.
During 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 insert is 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 invention 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 assembles by large O type silicone rubber O-ring and valve body.
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 be arranged on and two square annular grooves between the corresponding valve body in copper sheathing position on, 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.
During 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 eccentric chute of the corresponding embedding of little bearing 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, with two screws, be fixed.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, by relief hole 27, enter gas pressure relief slot 28, 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, protected transmission part in valve not corroded, improved the reliability of EGR valve work, extended 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 the annular gas pressure relief slot (28) that is communicated with 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 |
|---|---|---|---|
| CN201410324663.9A CN104100418B (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 |
|---|---|---|---|
| CN201410324663.9A CN104100418B (en) | 2014-07-08 | 2014-07-08 | A kind of pressure relief of electric EGR valve |
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| Publication Number | Publication Date |
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| CN104100418A true CN104100418A (en) | 2014-10-15 |
| CN104100418B CN104100418B (en) | 2016-03-23 |
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| CN201410324663.9A Active CN104100418B (en) | 2014-07-08 | 2014-07-08 | A kind of pressure relief of electric EGR valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221297A (en) * | 2015-11-12 | 2016-01-06 | 无锡隆盛科技股份有限公司 | A kind of exhaust pressure relief structure being applied to electric EGR valve |
| WO2016075093A1 (en) * | 2014-11-10 | 2016-05-19 | Continental Automotive Gmbh | Sealing system and exhaust gas recirculation valve comprising same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017110320B4 (en) * | 2017-05-12 | 2018-12-20 | Pierburg Gmbh | Exhaust valve for an internal combustion engine |
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| CN1315622A (en) * | 2000-03-23 | 2001-10-03 | 游伟 | Valve with front and back sealing rings and regulation structure of internal axial pressure difference |
| JP2010024998A (en) * | 2008-07-21 | 2010-02-04 | Aisan Ind Co Ltd | Exhaust gas recirculation control valve and fitting structure thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016075093A1 (en) * | 2014-11-10 | 2016-05-19 | Continental Automotive Gmbh | Sealing system and exhaust gas recirculation valve comprising same |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104100418B (en) | 2016-03-23 |
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