CN104100418B - A kind of pressure relief of electric EGR valve - Google Patents
A kind of pressure relief of electric EGR valve Download PDFInfo
- Publication number
- CN104100418B CN104100418B CN201410324663.9A CN201410324663A CN104100418B CN 104100418 B CN104100418 B CN 104100418B CN 201410324663 A CN201410324663 A CN 201410324663A CN 104100418 B CN104100418 B CN 104100418B
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- copper sheathing
- rings
- egr valve
- pressure relief
- 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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- Exhaust-Gas Circulating Devices (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a kind of pressure relief of electric EGR valve, comprise and be positioned at electric EGR valve air cavity upper end and be set on center-pole and the copper sheathing assembly be fixed on valve body that presses; 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 minipads and four relief holes.The seal tissue that the present invention can prevent waste gas from breaking through electric EGR valve seals in transmission tissue, protects transmission part in valve and is not corroded, improve the reliability of EGR valve work, extend the working life of EGR valve.
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 regulating 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, then by reducing gear, power is sent on center-pole, thus drive center-pole to carry out linear reciprocating motion, thus control the flow of waste gas circulation by motor driven gear.Electric EGR valve also carries out the EGR valve of Real-time Feedback and monitor aperture by institute's belt sensor, have advantages such as controlling accurately, the response time is fast.The sensor of conventional electric EGR valve is the Hall sensor chip of contactless, avoids conventional electric EGR valve sensor used due to vibration abrasion and causes the problem of sensor failure.Electric EGR valve also has good versatility, for the traffic requirement of different motor, according to the bore changing seat ring and spool, can meet different usage requirements, avoid the economic waste of repetition 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 after a period of operation and lost efficacy, and waste gas breaks 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 valve lost efficacy, 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 seal tissue preventing waste gas from breaking through electric EGR valve to seal 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 and is positioned at electric EGR valve air cavity upper end and is set on center-pole and the copper sheathing assembly be fixed on valve body that presses; 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 hole outer ends; 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 shoulder hole respectively; 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 that valve body is arranged 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 third layer 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 and seal and assemble.
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 have employed above technological scheme, the invention technological progress is as follows.
The invention provides a kind of pressure relief of electric EGR valve, the copper sheathing assembly of double seal tissue is provided with in the middle of valve body transmission system and valve body waste gas circulation chamber, and relief hole is provided with between this double seal tissue, even if waste gas few under high-pressure situations has broken through the first resealing, 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.
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.
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 be connected with cooler; It is the waste gas air outlet be connected with engine air inlet tube on the left of valve body; 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 controlling switching spool.
Containing Hall chip in sensor unit, be arranged on the changes of magnetic field of passive tooth wheel shaft upper magnetic steel assembly generation by induction, the real-time aperture of reflection mortor operated valve, feeds back to ECU and completes 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 being 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, taken out sensor unit after one hour after covering cover plate.
Transmission system comprises motor assembly, transition gear and driven gear.Motor assembly in the position place, motor hole of valve body, is provided with wavy spring below motor by motor pressing plate location and installation, alleviates the vibratory impulse power reducing motor and be subject to; Transition gear is located by transition gear axle, and around its central rotation, the moment of torsion that motor produces is passed 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; Center-pole is provided with 3 oil storage tanks, can lubricating grease be stored, ensure center-pole smooth and easy slip in copper sheathing; Connection bent plate and center-pole revolve to be riveting and connect, and load connecting rod; Connecting rod interference loads little bearing, and is embedded by little bearing in the eccentric chute of driven gear.
During center-pole general assembly, first the borehole jack of the band countersunk head step connected on bent plate is entered on center-pole, and carry out revolving to be riveting connecing; Again connecting rod is inserted and connect on bent plate, and carry out revolving to be riveting connecing; Little bearing elastic conjunction enters on connecting rod.Due to the restriction of assembly technology, spool need weld after half-finished center-pole assembly loading valve body again.
Also be provided with pressure relief in the electric EGR valve of the present embodiment, pressure relief is arranged on structure in electric EGR valve as shown in Figure 1.
The air hole that pressure relief of the present invention comprises copper sheathing assembly 2 and is arranged 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 minipad 26, some relief holes 27 and an annular gas pressure relief slot 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 the large O type silicone rubber O-ring 24 of setting-in two, and is assembled 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 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 shoulder hole respectively, 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 third layer ladder place of lower end; The inner ring sealing with center-pole that two teflin rings 22 lay respectively at two little O type silicone rubber O-rings 23 assembles.
During electric EGR valve assembling, after first seat ring interference being loaded valve body positioning hole, valve body is pressed fixing.Again guide pad interference is loaded in valve body, and the passive tooth wheel shaft loading onto bearing and split washer loads valve body, and it is fixing to carry out pressing.Then torsion spring is put into, the spring seat of honour is sealed in passive tooth wheel shaft, more flat for the band of driven gear circle of position hole is corresponding with the flat position on passive tooth wheel shaft, block the crotch above torsion spring, driven gear is revolved the half rear press-in passive tooth wheel shaft that turns around, magnet steel assembly is snapped on passive wheel shaft.Center-pole assembly is sealed in valve body drive cavity, little bearing correspondence is embedded in the eccentric chute of driven gear.Copper sheathing assembly is inserted in center-pole from valve body suction port direction, and is pressed into valve body, press fixing.Wavy spring and motor assembly are put into successively the corresponding aperture position of valve body, and load onto motor pressing plate, be fixed with two screws.Again transition gear axle and transition gear are loaded valve body successively, sensor unit is fixed on valve body by 5 screws, by spool laser bonding on center-pole, so namely completes 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, in a high voltage state, a small amount of waste gas has broken through copper sheathing assembly lower end by large Shim 21, minipad 26, teflin ring 22, first resealing of little O type silicone rubber O-ring 23 composition, gas pressure relief slot 28 is entered 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, second resealing of little O type silicone rubber O-ring 23 composition 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 and be positioned at electric EGR valve air cavity upper end and be set on center-pole and the copper sheathing assembly (2) be fixed on valve body (1) that presses; 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), minipad (26), some relief holes (27) and is communicated with the annular gas pressure relief slot (28) of all relief hole outer ends;
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 square annular grooves, and the two ends up and down of copper sheathing inner ring are set to shoulder hole respectively;
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 that valve body is arranged 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 third layer 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 and seal and assemble.
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 CN104100418A (en) | 2014-10-15 |
| CN104100418B true CN104100418B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3401538A1 (en) * | 2017-05-12 | 2018-11-14 | Pierburg GmbH | Exhaust valve for a combustion engine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204212877U (en) | 2014-11-10 | 2015-03-18 | 大陆汽车电子(芜湖)有限公司 | Sealing system and comprise the exhaust gas recirculation valve of sealing system |
| 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 |
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| US6394135B2 (en) * | 1999-05-18 | 2002-05-28 | Barber-Colman | Balanced plug valve with contour wall |
| 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 |
| CN101749483B (en) * | 2010-02-10 | 2012-01-04 | 中山市美图塑料工业有限公司 | Simple adjustable pressure-reducing valve |
| CN201650508U (en) * | 2010-04-30 | 2010-11-24 | 无锡隆盛科技有限公司 | Electric EGR valve for preventing waste gas from entering into sensor |
| DE102011005341A1 (en) * | 2011-03-10 | 2012-09-13 | Schaeffler Technologies Gmbh & Co. Kg | Needle sleeve, in particular for the pivotal mounting of the throttle shaft of a control device for exhaust gas recirculation to internal combustion engines |
| CN102230430B (en) * | 2011-06-03 | 2013-04-03 | 浙江九隆机械有限公司 | EGR (Exhaust Gas Recirculation) valve |
| GB201116858D0 (en) * | 2011-09-30 | 2011-11-09 | Gt Group Ltd | Improved butterfly valve |
| CN203147018U (en) * | 2013-01-24 | 2013-08-21 | 上海纳福希阀门有限公司 | Ultralow-temperature valve and valve rod triple sealing structure |
| CN103206319A (en) * | 2013-03-29 | 2013-07-17 | 无锡隆盛科技股份有限公司 | Sealing structure for electric EGR (exhaust gas recirculation) valve |
| CN203978649U (en) * | 2014-07-08 | 2014-12-03 | 无锡隆盛科技股份有限公司 | A kind of pressure relief of electric EGR valve |
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- 2014-07-08 CN CN201410324663.9A patent/CN104100418B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3401538A1 (en) * | 2017-05-12 | 2018-11-14 | Pierburg GmbH | Exhaust valve for a combustion engine |
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| CN104100418A (en) | 2014-10-15 |
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