CN104234878B - EGR (Exhaust Gas Recirculation) valve driven by motor - Google Patents
EGR (Exhaust Gas Recirculation) valve driven by motor Download PDFInfo
- Publication number
- CN104234878B CN104234878B CN201410488956.0A CN201410488956A CN104234878B CN 104234878 B CN104234878 B CN 104234878B CN 201410488956 A CN201410488956 A CN 201410488956A CN 104234878 B CN104234878 B CN 104234878B
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- driving
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- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000035515 penetration Effects 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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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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- Mechanically-Actuated Valves (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention relates to an EGR (Exhaust Gas Recirculation) valve, namely an EGR system air inlet valve, in particular to an EGR valve driven by a motor. The EGR valve comprises a valve rod and a driving mechanism which is connected to the valve rod and is used for driving the valve rod to do an axis movement, wherein the driving mechanism is arranged in a shell; the valve rod is inserted into a valve element; the front end of the valve rod is fixedly connected with a valve plate; the driving mechanism comprises the driving motor, a transmission gear and a cam, wherein the cam is provided with an axial hole for mounting a cam shaft, gear teeth arranged around the axial hole and an arc-shaped through hole; a driving gear is fixedly arranged on a power shaft of the driving motor; the driving gear is in transmission connection with the gear teeth through the transmission gear; the rear end of the valve rod is arranged in the arc-shaped through hole through a pin shaft. The EGR valve driven by the motor is driven by the direct-current motor and is compact and reasonable in structure, convenient to assemble and high in response speed, and the sealability is easy to guarantee.
Description
Technical field
The present invention relates to a kind of EGR valve, is a kind of motor-driven EGR valve specifically.
Background technique
Gas recirculation system English is Exaust Gas Recirculation, is called for short EGR.Motor arranges Exhaust gas recirculation device, is one of most effective means controlling to reduce harmful gas NOX in exhaust.
The opening speed of EGR valve, throttling precision is its critical technical parameter; Reliability and cost are the principal elements affecting Project Realization.In order to obtain outstanding throttling accuracy and reliability, adopt the valve form of straight line opening and closing to be one of conventional scheme, driving principle is the motion that is in line by electromagnetic rotating motion converter, and shifting mechanism has cam path, reciprocating mechanism etc.Scheme advantage based on finite angle Direct driver is that response is very fast, and shortcoming is that cost is higher.Adopt direct current generator and have cost advantage by the scheme that speed reducer drives, but in order to obtain higher speed of response, needing pot motor.Meanwhile, for meeting opening force requirement, need larger reduction speed ratio, the gear reduction of general employing two-stage, its defect is that volume is comparatively large, and impact is actual to be used.The EGR valve that Delphi company of the U.S. produces, adopt the air inlet of balanced type double valve, two valve block diameters are identical, and it is zero that atmospheric pressure acts on making a concerted effort on spool, and this structure can meet the requirement of Great flow rate and high speed solenoid valve.But because the manufacturability of processing and assembling limits, the production technology manufacturing valve block split, combine installation can only be adopted, two valve blocks manufacture respectively, one is assembled into by the process connection such as welding or press-fit again in assembly process, its complex structure, manufacturability is poor, valve in off position time sealing be comparatively difficult to ensure card.
Summary of the invention
Technical problem to be solved by this invention is: the motor-driven EGR valve providing a kind of DC motor Driver, compact structure, sealing easily ensures, be convenient to assembling, fast response time.
For solving the problems of the technologies described above, the present invention adopts following technological scheme:
Motor-driven EGR valve of the present invention comprises valve rod and is connected to driving mechanism valve rod doing axial-movement for actuate valve stem, described driving mechanism is arranged in housing, described valve rod is inserted on spool, the front end of valve rod is fixedly connected with valve block, described driving mechanism comprises drive motor, driving gear and cam, described cam is provided with the axis hole for installing camshaft, the gear tooth arranged around axis hole and arc penetration hole, the line shaft of described drive motor is installed with driving gear, described driving gear is in transmission connection by driving gear and gear tooth, the rear end of described valve rod is arranged in arc penetration hole by bearing pin.
Described valve block is by two unequal lamellar bodies of diameter and is arranged on the integral type double valve sheet that the connecting rod between two lamellar bodies forms.
Described driving gear comprises coaxial mounted first intermediate gear and the second intermediate gear, and described first intermediate gear engages with driving gear, and described second intermediate gear engages with gear tooth.
Between the upper end cap and driving gear of drive motor, be fixedly installed circuit board, described circuit board be provided with sensor chip and peripheral circuit thereof, the camshaft corresponding to sensor chip fixedly mounts sensor-magnet; Described camshaft is also provided with return spring.
Owing to have employed technique scheme, this motor-driven EGR valve adopts DC motor Driver, compact structure reasonable, good airproof performance, is convenient to assembling, fast response time.
Accompanying drawing explanation
Fig. 1 is the internal structure schematic diagram of the embodiment of the present invention.
Fig. 2 is the structure sectional view of Fig. 1 embodiment.
Fig. 3 is the internal structure stereogram of Fig. 1 embodiment.
Fig. 4 is the structural representation of cam.
Embodiment
As shown in Figure 1 and Figure 2, motor-driven EGR valve of the present invention comprises valve rod 1 and is connected to driving mechanism valve rod 1 doing axial-movement for actuate valve stem, described valve rod 1 is inserted on spool 2, the front end of valve rod 1 is fixedly connected with valve block 3, and described valve block 3 is by two unequal lamellar bodies of diameter and is arranged on the integral type double valve sheet that the connecting rod between two lamellar bodies forms.Double valve sheet structure can pass through more gas, enlargement discharge respectively from the valve that two valve block bodies are formed.Two unequal lamellar bodies of diameter can be in place from same one end of spool 2, Split type valve core structure need not be adopted, spool adopts integral structure, avoids to adopt welding or the technique such as to press-fit to assemble the technologic defect that two lamellar bodies bring, the such as sealing problem of spool and valve block sealing surface.When installing, as long as the outer end of integral type double valve sheet from spool 2 is sent into, be installed on valve rod 1.
Described driving mechanism is arranged in housing 14, and driving mechanism comprises drive motor 4, driving gear and cam 5.As shown in Figure 4, described cam 5 be provided with axis hole 51 for installing camshaft, the gear tooth 52 that arranges around axis hole 51 and arc penetration hole 53.Cam 5 is arranged on camshaft by axis hole 51, and swings centered by camshaft.
The line shaft of described drive motor 4 is installed with driving gear 41, and described driving gear 41 is in transmission connection by driving gear and gear tooth 52.Described driving gear comprises coaxial mounted first intermediate gear 7 and the second intermediate gear 8, and described first intermediate gear 7 engages with driving gear 41, and described second intermediate gear 8 engages with gear tooth 52.Time drive motor 4 works, driving gear 41 drives the first intermediate gear 7 and the second intermediate gear 8 to rotate, thus is with moving cam 5 to swing by the second intermediate gear 8 and gear tooth 52.Certainly, in order to reach suitable velocity ratio, more driving gear can also be set between driving gear 41 and gear tooth 52.This is the conventional design means of the art, does not do at this describe more.
As shown in Figure 2, the wheel shaft of described camshaft 13 and installation driving gear is installed on the inwall of housing 14, makes it be separated with drive motor 4, is convenient to installation and maintenance.
The rear end of described valve rod 1 is arranged in arc penetration hole 53 by bearing pin 13.Described bearing pin 13 is arranged in arc penetration hole 53, and the two ends of bearing pin 13 are connected with valve rod 1.When cam 5 swings time, bearing pin 13 slides into the other end from one end of arc penetration hole 53, and not etc., and centre does not seamlessly transit the distance between the two ends of arc penetration hole 53 and axis hole 51.Like this, when bearing pin 13 slides from one end of the arc penetration hole 53 far away apart from axis hole 51 to the other end time, pulling function is produced to valve rod 1, corresponding valve closing; Otherwise, when bearing pin 13 slides from one end that distance axis hole 51 is near to the other end time, impetus is produced to valve rod 1, corresponding valve open.
In addition, circuit board 9 is fixedly installed between the upper end cap and driving gear 41 of drive motor 4, described circuit board 9 is provided with sensor chip 10 and peripheral circuit thereof, the camshaft corresponding to sensor chip 10 fixedly mounts sensor-magnet 11, sensor chip 10 coordinates the angle that can detect cam 5 and swing with sensor-magnet 11, for control circuit provides parameter.Described camshaft is also provided with return spring 12.Under the states such as device powers down, cam 5 can be returned to original state, make valve keep closing.
Claims (2)
1. motor-driven EGR valve, comprise valve rod (1) and be connected to driving mechanism valve rod (1) doing axial-movement for actuate valve stem, described driving mechanism is arranged in housing (14), described valve rod (1) is inserted on spool (2), the front end of valve rod (1) is fixedly connected with valve block (3), it is characterized in that: described driving mechanism comprises drive motor (4), driving gear and cam (5), described cam (5) is provided with the axis hole (51) for installing camshaft, the gear tooth (52) arranged around axis hole (51) and arc penetration hole (53), the line shaft of described drive motor (4) is installed with driving gear (41), described driving gear (41) is in transmission connection by driving gear and gear tooth (52), the rear end of described valve rod (1) is arranged in arc penetration hole (53) by bearing pin (13), described valve block (3) is by two unequal lamellar bodies of diameter and is arranged on the integral type double valve sheet that the connecting rod between two lamellar bodies forms, described driving gear comprises coaxial mounted first intermediate gear (7) and the second intermediate gear (8), described first intermediate gear (7) is engaged with driving gear (41), and described second intermediate gear (8) is engaged with gear tooth (52).
2. motor-driven EGR valve according to claim 1, it is characterized in that: between the upper end cap and driving gear (41) of drive motor (4), be fixedly installed circuit board (9), described circuit board (9) is provided with sensor chip (10) and peripheral circuit thereof, the camshaft corresponding to sensor chip (10) fixedly mounts sensor-magnet (11); Described camshaft is also provided with return spring (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488956.0A CN104234878B (en) | 2014-09-23 | 2014-09-23 | EGR (Exhaust Gas Recirculation) valve driven by motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488956.0A CN104234878B (en) | 2014-09-23 | 2014-09-23 | EGR (Exhaust Gas Recirculation) valve driven by motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104234878A CN104234878A (en) | 2014-12-24 |
| CN104234878B true CN104234878B (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410488956.0A Active CN104234878B (en) | 2014-09-23 | 2014-09-23 | EGR (Exhaust Gas Recirculation) valve driven by motor |
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| CN (1) | CN104234878B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159823A (en) * | 2019-05-24 | 2019-08-23 | 安徽江淮汽车集团股份有限公司 | A kind of valve rod driving mechanism and exhaust gas recirculation valve |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775944A (en) * | 2015-04-25 | 2015-07-15 | 无锡隆盛科技股份有限公司 | Electric EGR (exhaust gas recirculation) valve |
| CN106979102A (en) * | 2016-01-15 | 2017-07-25 | 现代凯菲克株式会社 | The exhaust gas recirculation valve device of cam structure |
| CN107725224A (en) * | 2016-08-12 | 2018-02-23 | 大陆汽车电子(芜湖)有限公司 | Linear exhaust gas control valve |
| CN106122524A (en) * | 2016-08-31 | 2016-11-16 | 上海交通大学 | Rotary valve member with deceleration device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2967472B1 (en) * | 2009-12-22 | 2015-12-25 | Valeo Systemes De Controle Moteur | DEVICE FOR TRANSFORMING A ROTATION MOVEMENT INTO A TRANSLATION MOVEMENT |
| CN201747485U (en) * | 2010-08-17 | 2011-02-16 | 无锡隆盛科技有限公司 | Electric EGR valve |
| CN202578950U (en) * | 2012-03-16 | 2012-12-05 | 联创汽车电子有限公司 | Electric controlled EGR (Exhaust Gas Recirculation) valve driven by two stages of gears |
| CN202611935U (en) * | 2012-06-01 | 2012-12-19 | 潍坊威度电子科技有限公司 | Electric EGR valve |
| CN203584619U (en) * | 2013-11-12 | 2014-05-07 | 联创汽车电子有限公司 | Exhaust gas recirculation valve |
| CN203822497U (en) * | 2014-03-26 | 2014-09-10 | 潍柴动力股份有限公司 | Novel EGR (exhaust gas recirculation) valve |
| CN204082389U (en) * | 2014-09-23 | 2015-01-07 | 潍坊力创电子科技有限公司 | Motor-driven EGR valve |
-
2014
- 2014-09-23 CN CN201410488956.0A patent/CN104234878B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159823A (en) * | 2019-05-24 | 2019-08-23 | 安徽江淮汽车集团股份有限公司 | A kind of valve rod driving mechanism and exhaust gas recirculation valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104234878A (en) | 2014-12-24 |
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Effective date of registration: 20160520 Address after: 261061, Shandong province high tech Zone, 6888 Health East Street, blue valley enlightenment star incubator B2 building, room 2001, Weifang Patentee after: Shandong Boding Power Technology Co., Ltd. Address before: 261000 Shandong Province, Weifang city health Street intersection of Yongchun Hong Kong and China Building 12 floor Patentee before: WEIFANG LICHUANG ELECTRONIC TECHNOLOGY CO., LTD. |
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Effective date of registration: 20191101 Address after: 261061 East of No. 4 Shengrui Industrial Park, 6555 Baotong East Street, Yujing Community, Qingchi Street, Weifang High-tech Zone, Shandong Province Patentee after: WEIFANG LICHUANG ELECTRONIC TECHNOLOGY CO., LTD. Address before: 261061, Shandong province high tech Zone, 6888 Health East Street, blue valley enlightenment star incubator B2 building, room 2001, Weifang Patentee before: Shandong Boding Power Technology Co., Ltd. |