CN204299726U - A kind of motorcar electric EGR valve - Google Patents
A kind of motorcar electric EGR valve Download PDFInfo
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- CN204299726U CN204299726U CN201420767106.XU CN201420767106U CN204299726U CN 204299726 U CN204299726 U CN 204299726U CN 201420767106 U CN201420767106 U CN 201420767106U CN 204299726 U CN204299726 U CN 204299726U
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- valve
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- screw
- inner chamber
- screw rod
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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
A kind of motorcar electric EGR valve, valve seat is offered air inlet and gas outlet; Channel connection is passed through in air inlet and gas outlet; The elongated hole communicated with inner chamber is offered in valve seat inside, and valve rod is arranged in inner chamber and elongated hole; Valve rod rises can block passage, valve rod declines and can open passage; Case top is provided with the end cap caved inward; Also comprise screw drive assembly; Screw drive assembly comprises and is arranged on the stator above end cap, the rotor being arranged on stator interior and screw rod; Screwed hole offered by rotor, is equipped with screw rod in screwed hole, screw rod lower end to be stretched in the inner chamber below end cap and is connected with valve stem top.The beneficial effects of the utility model are: the displacement directly uniquely can being determined valve rod by the rotational angle of motor, and then the aperture of control channel and air inflow, without the need to arranging feedback element again.And screw drive assembly and housing are connected up and down, greatly reduce the volume of valve, reduce the space taken.
Description
Technical field
The utility model belongs to and engine exhaust emission recirculating system field, is specifically related to a kind of motorcar electric EGR valve.
Background technology
In engine exhaust-gas recirculating system (EGR system), EGR valve is mainly used in the flow of regulable control EGR gas, electronic EGR valve is by the aperture size of inside DC MOTOR CONTROL air inlet in the morning, thus adjustment exhaust gas flow, return cylinder after waste gas is mixed by a certain percentage with fresh air to recycle, to reduce combustor inner cylinder temperature and burning velocity, further thus reduce NO
xdischarge capacity.For pneumatic EGR valve, electronic EGR valve has fast response time, runs more stable feature, and electronic EGR valve can also solve the difficult problem that some vehicle does not have vacuum source, therefore applies comparatively extensive.
Electromagnetism EGR valve generally includes valve seat assembly, by valve seat bush, valve rod is installed in valve seat assembly, the upper end of valve seat assembly is connected with shell, coil assembly is provided with in shell, coil assembly inner chamber is provided with even iron by even iron fairlead, the two ends up and down of even iron are respectively arranged with magnetic sheet and lower magnetic sheet, coil assembly and upper magnetic sheet are compressed above shell by gland; Valve stem tip is close to even iron.Be fitted with valve rod end cap in the middle part of valve rod, between valve rod end cap and lower magnetic sheet, be provided with the return spring for the valve rod that resets.During the work of electromagnetism EGR valve, apply voltage at coil assembly two ends, coil obtains electric, produces downward magnetic field, and even iron is with ovable valve stem to move downward under the influence of a magnetic field, and return spring is compressed, thus realizes the action of valve; When coil assembly two ends dead electricity, valve rod just resets under the effect of return spring.But existing electromagnetism EGR valve is in course of action, the aperture of valve correctly cannot be judged, and the stability of valve valve rod in course of action.In actual moving process, by controlling the voltage applied to coil assembly two ends, thus the aperture of control valve, therefore the outside of valve also needs the device arranging control voltage change, and this just causes electromagnetism EGR valve to there is the deficiencies such as volume is large, expensive.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provides a kind of cheap, small volume and the high motorcar electric EGR valve of control accuracy.
The utility model solves the technical scheme that its technical problem adopts: a kind of motorcar electric EGR valve, comprises housing, valve seat and valve rod; Valve seat is arranged on housing bottom, and enclosure interior offers the inner chamber to lower recess, valve seat is offered air inlet and gas outlet; Channel connection is passed through in air inlet and gas outlet; The elongated hole communicated with inner chamber is offered in valve seat inside, and valve rod is arranged in inner chamber and elongated hole; Valve rod rises can block passage, valve rod declines and can open passage; Case top is provided with the end cap caved inward; Also comprise screw drive assembly; Screw drive assembly comprises and is arranged on the stator above end cap, the rotor being arranged on stator interior and screw rod; Screwed hole offered by rotor, is equipped with screw rod in screwed hole, screw rod lower end to be stretched in the inner chamber below end cap and is connected with valve stem top; Rotor turns can drive screw up and down; Screw rod lower surface arranges gland; Between gland and intracavity bottom, vertically spring is set; Valve rod is arranged in spring.
Preferably, air inlet and gas outlet are opened in the same side, and gas outlet is positioned at the top of air inlet.
Preferably, the internal thread of screwed hole and the external screw thread of screw rod are trapezoidal thread.
Compared with prior art, the beneficial effects of the utility model are:
1, rotor turns drive screw and valve rod move, and rotor is by driving stepper motor, directly uniquely can be determined the displacement of valve rod by the rotational angle of motor, and then the aperture of control channel and air inflow, without the need to arranging feedback element again.And screw drive assembly and housing are connected up and down, greatly reduce the volume of valve, reduce the space taken.
2, due to the existence of spring, the downside of the upper side of screw flight and screwed hole screw thread is close to all the time, thus guarantees when rotor rotating phase co-conversion, eliminate screw thread return difference, thus improve control accuracy.
3, screw thread adopts trapezoidal thread, can the width of overstriking tooth form further, thus raising precision.
Accompanying drawing explanation
Fig. 1 is the utility model structural perspective;
Fig. 2 is the utility model structural front view;
Fig. 3 is the sectional view along A-A line in Fig. 2.
Be labeled as in figure:
1 housing; 1.1 inner chamber; 2 end caps; 3 valve seats; 3.1 elongated hole; 4 air inlets; 5 gas outlets; 6 valve rods; 7 glands; 8 stators; 9 screw rods; 10 rotors; 10.1 screwed holes; 11 springs.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the utility model is described further:
As shown in Figure 1, 2, 3, a kind of motorcar electric EGR valve, comprises housing 1, valve seat 3, valve rod 6 and screw rod 9 drive assembly.Valve seat 3 is arranged on bottom housing 1, and housing 1 top is provided with the end cap 2 caved inward, and housing 1 is offered the inner chamber 1.1 to lower recess.Valve seat 3 is offered air inlet 4 and gas outlet 5, air inlet 4 and gas outlet 5 are opened in the same side, and gas outlet 5 is positioned at the top of air inlet 4, and channel connection is passed through in air inlet 4 and gas outlet 5.The elongated hole communicated with inner chamber 1.1 is offered in valve seat 3 inside, and valve rod 6 is arranged in inner chamber 1.1 and elongated hole.Valve rod 6 rises can block passage, valve rod 6 declines and can open passage.Screw rod 9 drive assembly is arranged on end cap 2, and screw rod 9 drive assembly comprises stator 8, rotor 10 and screw rod 9.Stator 8 is connected with end cap 2, and rotor 10 is arranged in stator 8, and by driving stepper motor.Rotor 10 is offered screwed hole 10.1, be equipped with screw rod 9 in screwed hole 10.1, screw rod 9 lower end to be stretched in the inner chamber 1.1 below end cap 2 and is connected with valve rod 6 top; Rotor 10 rotate can drive screw 9 up and down.Because threaded engagement exists backlash phenomena, when result in rotating change, the rotation that there is very short time is stagnated, thus the situation causing electric machine rotation angle not identical with screw rod 9 rotational angle.Therefore in order to solve this phenomenon, under not improving again the prerequisite of requirement on machining accuracy.Gland 7 can be set in screw rod 9 lower surface; Between bottom gland 7 and inner chamber 1.1, spring 11 is vertically set; Valve rod 6 is arranged in spring 11.Thus, because spring 11 is in compressive state all the time, cause no matter motor rotates forward or reversion, gland 7 is subject to spring 11 thrust upwards all the time, thus the upper side of screw rod 9 screw thread is tightly fitted with the screw thread downside of screwed hole 10.1 all the time.When ensure that rotating, motor can rotate by drive screw 9 promptly and accurately, thus improves precision.
In order to further promote precision, eliminate return difference impact, the internal thread of screwed hole 10.1 and the external screw thread of screw rod 9 are processed into wider trapezoidal thread.
Utility model works principle and the course of work as follows:
Operationally, screw rod 9 drive assembly is subject to motor and drives thus drive screw rod 9 to decline EGR valve, and valve rod 6 declines thereupon and passage is opened, and waste gas enters from air inlet 4 and then enters the inlet manifold of engine through gas outlet 5, again burns.In screw rod 9 and valve rod 6 decline process, the rotational angle of stepper motor controls by automobile chip thus automatically controls air inflow, without the need to learnt by feedback air inflow number.By controlling motor positive and inverse, drive screw 9 moves up and down, the aperture of final control channel and air inflow.
The above, it is only preferred embodiment of the present utility model, be not restriction the utility model being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solutions of the utility model content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.
Claims (3)
1. a motorcar electric EGR valve, comprises housing, valve seat and valve rod; Valve seat is arranged on housing bottom, and enclosure interior offers the inner chamber to lower recess, valve seat is offered air inlet and gas outlet; Channel connection is passed through in air inlet and gas outlet; The elongated hole communicated with inner chamber is offered in valve seat inside, and valve rod is arranged in inner chamber and elongated hole; Valve rod rises can block passage, valve rod declines and can open passage; It is characterized in that: case top is provided with the end cap caved inward; Also comprise screw drive assembly; Screw drive assembly comprises and is arranged on the stator above end cap, the rotor being arranged on stator interior and screw rod; Screwed hole offered by rotor, is equipped with screw rod in screwed hole, screw rod lower end to be stretched in the inner chamber below end cap and is connected with valve stem top; Rotor turns can drive screw up and down; Screw rod lower surface arranges gland; Between gland and intracavity bottom, vertically spring is set; Valve rod is arranged in spring.
2. a kind of motorcar electric EGR valve according to claim 1, it is characterized in that: air inlet and gas outlet are opened in the same side, gas outlet is positioned at the top of air inlet.
3. a kind of motorcar electric EGR valve according to claim 2, is characterized in that: the internal thread of screwed hole and the external screw thread of screw rod are trapezoidal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420767106.XU CN204299726U (en) | 2014-12-09 | 2014-12-09 | A kind of motorcar electric EGR valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420767106.XU CN204299726U (en) | 2014-12-09 | 2014-12-09 | A kind of motorcar electric EGR valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204299726U true CN204299726U (en) | 2015-04-29 |
Family
ID=53105271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420767106.XU Active CN204299726U (en) | 2014-12-09 | 2014-12-09 | A kind of motorcar electric EGR valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204299726U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669176A (en) * | 2021-09-08 | 2021-11-19 | 温州汇众汽车电器有限公司 | EGR valve assembly with water cooling function |
| CN114458485A (en) * | 2022-01-26 | 2022-05-10 | 温州市温纳汽车配件有限公司 | High-stability exhaust gas recirculation valve |
-
2014
- 2014-12-09 CN CN201420767106.XU patent/CN204299726U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669176A (en) * | 2021-09-08 | 2021-11-19 | 温州汇众汽车电器有限公司 | EGR valve assembly with water cooling function |
| CN114458485A (en) * | 2022-01-26 | 2022-05-10 | 温州市温纳汽车配件有限公司 | High-stability exhaust gas recirculation valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 255100 Shandong city in Zibo Province Economic Development Zone Zichuan Shuangshan Trinidad Road No. 5 Zibo Thailand Exhibition electromechanical Co Ltd Patentee after: Shandong Thailand Exhibition Polytron Technologies Inc Address before: 255100 Shandong city in Zibo Province Economic Development Zone Zichuan Shuangshan Trinidad Road No. 5 Zibo Thailand Exhibition electromechanical Co Ltd Patentee before: ZIBO TAIZHAN MECHANICAL AND ELECTRICAL CO., LTD. |
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| CP02 | Change in the address of a patent holder |
Address after: No.69 Meishan Road, Zichuan District, Zibo City, Shandong Province Patentee after: SHANDONG TAIZHAN MECHANICAL AND ELECTRICAL TECHNOLOGY CO.,LTD. Address before: 255100 Zibo Taizhan electromechanical Co., Ltd., No. 5, Shuangshan Qianli Road, Zichuan Economic Development Zone, Zibo City, Shandong Province Patentee before: SHANDONG TAIZHAN MECHANICAL AND ELECTRICAL TECHNOLOGY CO.,LTD. |
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| CP02 | Change in the address of a patent holder |