CN2755297Y - Electrically-controlled EGR valve of engine with step-by-step motor driven - Google Patents
Electrically-controlled EGR valve of engine with step-by-step motor driven Download PDFInfo
- Publication number
- CN2755297Y CN2755297Y CNU2004200824605U CN200420082460U CN2755297Y CN 2755297 Y CN2755297 Y CN 2755297Y CN U2004200824605 U CNU2004200824605 U CN U2004200824605U CN 200420082460 U CN200420082460 U CN 200420082460U CN 2755297 Y CN2755297 Y CN 2755297Y
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- valve body
- stepping motor
- utility
- stepper motor
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Abstract
The utility model relates to an engine electric control EGR valve driven by stepping motors, which comprises a valve body, a valve seat, a valve rod and a driving device. The utility model is characterized in that the driving device is a linear stepping motor; the valve rod is inserted in the valve body and penetrates through a filling material cavity of the valve body, filling materials in the filling material cavity of the valve body, a filling material pressing cover above the filling materials and a heat insulating plate additionally arranged on the upper part and is inserted in a connecting sleeve barrel; the valve seat is pressed in the valve body; the connecting sleeve barrel is fixed on the valve body by screws; the stepping motor is fixed on the connecting sleeve barrel by screws; a crankshaft of the stepping motor is inserted in the connecting sleeve barrel and is connected with the valve rod by male pins. When an engine runs, an EUC (an electronic control unit) calculates the optimum EGR rate conforming to the working conditions according to the rotary speed, the load, the temperature status and other working condition signals of the engine measured by a sensor, the corresponding control pulse value of the stepping motor is called in according to prestored information and can be used for precisely controlling the displacement of the stepping motor after power amplification, thereby, the utility model can precisely control EGR flow quantity under any work condition.
Description
Technical field
The utility model relates to exhaust gas recirculation device of engine, especially stepper motor driven engine electric control EGR valve.Adopt step motor drive, control petrol engine or diesel exhaust recirculation volume.
Background technique
Exhaust gas recirculation (English EGR, the abbreviation of Exhaust Gas Recirculation), its basic principle are that air inlet is introduced in the part exhaust, improve combustion performance, reduce the discharge amount of NOx in the exhaust.
Since the sixties, industrialized countries such as the U.S., Japan, West Europe use the decree regulated discharge standard to noxious emissions such as automobile exhaust CO, HC and NOx, thereby have directly promoted to pollute vehicular engine and to the research of exhaust gas purification measure to low.The EGR technology at first is applied to petrol engine abroad, be pure mechanical pneumatic type at first, be not with cool cycles, developed the EGR of band cool cycles afterwards, engaged with electronic control technology afterwards again, then develop gas electric type or electromagnetic type egr system, in these two kinds of systems, also have the branch of feedforward control and feedback control, the feedforward control dynamic response is good, feedback control Steady-State Control best results.Nowadays be widely used on the EGR gasoline car abroad.From the seventies later stage, just have the scholar that goal in research is turned to diesel engine EGR technology abroad, development up to the present is very fast, but its overall application is still not as the such extensive maturation of petrol engine, especially to large diesel engine, many problems are still waiting further to research and solve.
At home, also there are some colleges and universities and R﹠D institution that EGR has been made some Primary Study, but also do not obtain great progress, the distance that EGR still cannot not have shortly from practicability, commercialization in China.
Patent documentation CN 1076438C (title: the diesel electric-controlled EGR valve of rotary type) rotate, drive the rotation of butterfly valve block, and the seal ring of installing between valve body sealing reaches closed effect by torque motor.And valve body adopts two valve body pieces butt joint separately, owing to make or installation errors, the air inlet/outlet passage disalignment of valve appears easily, cause the seal ring radial location deviation of installing between two valve bodies, cause poorly sealedly, also can cause from the generation of two valve body joint gas leak phenomenons in addition.
Patent documentation CN 1333942A (title: EGR valve device) relate generally to the drive unit of EGR valve, adopt general direct current generator to add position transducer and control, obviously can cause the raising of cost.
Patent documentation CN 1335919A (title: EGR valve device) adopt step motor control, but valve body has the cooling water passage that valve body and motor are cooled off, and outside water source must be provided, and therefore can cause motor is carried out bigger change.
Summary of the invention:
In order to solve deficiency of the prior art, the utility model is at the characteristics of domestic dissimilar motors, and having adopted is the EGR valve of driving mechanism with the stepper motor.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of stepper motor driven engine electric control EGR valve, comprise valve body, valve seat, valve rod, drive unit, and it is characterized in that drive unit is a linear stepping motor; Valve rod inserts valve body, passes the packing cavity of valve body, passes the filler in the packing cavity of valve body, passes the Gland of filler top, is passed in the thermal baffle that the top installs additional again and inserts in the joint sheeve; Valve seat is pressed into valve body; Screw is fixed on joint sheeve on the valve body, and screw is fixed on stepper motor on the joint sheeve, and the stepper motor arbor inserts in the joint sheeve, connects by pin and valve rod.Joint sheeve is taked the configuration design of side punching; Filling filler between valve rod and valve body guide hole, Gland plays the leading role of valve rod; On valve body and the Gland thermal baffle is set and joint sheeve separates.
The major parameters such as EGR flow required according to Under Different Work Condition of Engine carries out structural design according to the knowledge of fluid mechanics and thermal conduction study, adopts the cast steel casting of mixing folder heating resisting metal element to form valve body.Bad phenomenon such as that valve body itself has been stopped is poorly sealed, gas leakage.
Because the utility model EGR valve has adopted effective thermal baffle heat insulation etc., guaranteed component such as stepper motor suitable can working environment, therefore reduced before EGR waste gas carried out water-cooled device.
Linear stepping motor is a kind of action principle of utilizing electromagnet, is the pulse signal conversion motor of linear displacement.
The utility model adopts step motor control.EGR flow arteries and veins spectrogram obtains by the experimental study to concrete motor, after obtaining it is converted into corresponding to the Stepping Motor Control pulse number, deposits ECU (ECU (Electrical Control Unit)) then in.When motor moves, working condition signals such as the engine speed that ECU (ECU (Electrical Control Unit)) records according to sensor, load, state of temperature, calculate and meet at that time that the EGR of the best of operating mode leads, call in corresponding step motor control pulse value, with the displacement of accurate control step motor, thereby reach the purpose of EGR flow under each operating mode of accurate control.Whole system is that a kind of simple relatively open type control system and control step motor are operated accordingly, under the situation that does not need position transducer, can satisfy the requirement of control accuracy.
Description of drawings
Fig. 1 is the utility model electric control EGR valve arrangement schematic representation;
Fig. 2 is a valve body plan view in the utility model electric control EGR valve;
Fig. 3 is a valve body plan view in the utility model electric control EGR valve;
Fig. 4 is that left view is cutd open in the valve body rotation in the utility model electric control EGR valve;
Fig. 5 is a valve seat complete section plan view in the utility model electric control EGR valve;
Fig. 6 is a valve seat plan view in the utility model electric control EGR valve;
Fig. 7 is a stepper motor profile worm's eye view in the utility model electric control EGR valve;
Fig. 8 is a stepper motor complete section plan view in the utility model electric control EGR valve;
Fig. 9 is a joint sheeve plan view in the utility model electric control EGR valve;
Figure 10 is a joint sheeve plan view in the utility model electric control EGR valve;
Figure 11 is a valve rod plan view in the utility model electric control EGR valve;
Figure 12 is a valve rod plan view in the utility model electric control EGR valve;
Figure 13 is a Gland worm's eye view in the utility model electric control EGR valve;
Figure 14 is a Gland complete section plan view in the utility model electric control EGR valve;
Figure 15 is a thermal baffle complete section plan view in the utility model electric control EGR valve;
Figure 16 is a thermal baffle plan view in the utility model electric control EGR valve.
Embodiment
As shown in Figure 1, the EGR valve is made up of valve body 1, valve seat 2, valve rod 3, thermal baffle 4, joint sheeve 5, stepper motor 6, screw 7, pin 8, nameplate 9, Gland 10, filler 11.
After valve rod 3 inserts valve body 1, valve seat 2 is pressed into valve body 1.Filler 11 is pressed into the packing cavity in the valve body 1, adds a cover Gland 10, compresses filler 11, on top installs thermal baffle 4 again additional, with screw 7 joint sheeve 5 is fixed on the valve body 1.
Get stepper motor 6, make arbor insert joint sheeve 5, rotation makes its pin-and-hole be in joint sheeve 5 lateral aperture center positions, make valve rod 3 insert stepper motor 6 arbor endoporus, rotation makes pin hole centering on valve rod 3 and the stepper motor 6, and pin 8 penetrates, and stepper motor 6 and valve rod 3 are connect.Stepper motor 6 is regulated in rotation, with screw stepper motor 6 and joint sheeve 5 is connect.
Fig. 2, Fig. 3, shown in Figure 4 be valve body 1, assembling valve seat 2 in its lower end face.Valve body 1 lateral aperture is an EGR valve exhaust exit orifice.Fig. 8, Fig. 9 are valve seat 2, and its aperture is EGR valve air inlet main flow hole.
Fig. 7, Fig. 8 are stepper motor 6, and its axle head is equipped with pin hole, connect valve rod 3 by pin 7, move thereby the axial linear stepping of stepper motor 6 drives the valve of valve rod 3.
Fig. 9, Figure 10 are joint sheeve 5, connect and fixedly stepper motor 6 and valve body 1, and compress thermal baffle 4 and Gland 10.The heat that its configuration design makes valve body 1 interior gas pass to stepper motor 6 is minimum.
Figure 11, Figure 12 are valve rod 3, and axle head is equipped with pin-and-hole, and its configuration design takes into account heat conduction and assembling needs.
Figure 13, Figure 14 are Gland 10, compress filler 11, and to valve rod 3 leading roles.Filler makes valve body 1 interior gas be unlikely to leak, and simultaneously valve rod 3 is played lubrication.
Figure 15, Figure 16 are thermal baffle 4, adopt the single face sheet metal to add that thermal-protective material is compound to be made, and make the temperature of valve body 1 or more controlled, and the assurance related components is in specified working temperature environment.
Claims (3)
1. a stepper motor driven engine electric control EGR valve comprises valve body, valve seat, valve rod, drive unit, it is characterized in that: drive unit is linear stepping motor (6); Valve rod (3) inserts valve body (1), passes the packing cavity of valve body (1), passes the filler (11) in the packing cavity of valve body (1), passes the Gland (10) of filler (11) top, is passed in the thermal baffle (4) that the top installs additional again and inserts in the joint sheeve (5); Valve seat (2) is pressed into valve body (1); Screw (7) is fixed on joint sheeve (5) on the valve body (1), and screw (7) is fixed on stepper motor (6) on the joint sheeve (5), and stepper motor (6) arbor inserts in the joint sheeve (5), connects by pin (8) and valve rod (3).
2. stepper motor driven engine electric control EGR valve as claimed in claim 1 is characterized in that: joint sheeve (5) side that above-mentioned EGR valve is adopted has the hole.
3. a kind of stepper motor driven engine electric control EGR valve as claimed in claim 1 is characterized in that: thermal-protective material is compound to be made the thermal baffle (4) that above-mentioned EGR valve adopts for sheet metal adds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200824605U CN2755297Y (en) | 2004-09-01 | 2004-09-01 | Electrically-controlled EGR valve of engine with step-by-step motor driven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200824605U CN2755297Y (en) | 2004-09-01 | 2004-09-01 | Electrically-controlled EGR valve of engine with step-by-step motor driven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2755297Y true CN2755297Y (en) | 2006-02-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200824605U Expired - Fee Related CN2755297Y (en) | 2004-09-01 | 2004-09-01 | Electrically-controlled EGR valve of engine with step-by-step motor driven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2755297Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949340A (en) * | 2010-03-11 | 2011-01-19 | 哈尔滨安龙迪环保科技有限公司 | Electrical control EGR valve for reducing working temperature and improving working reliability |
| CN102032379A (en) * | 2010-12-28 | 2011-04-27 | 北京华通兴远供热节能技术有限公司 | Control valve |
| CN101501380B (en) * | 2006-08-02 | 2012-10-10 | 博格华纳公司 | Egr system and egr valve with integrated pressure sensor |
| CN103133190A (en) * | 2013-03-15 | 2013-06-05 | 第一拖拉机股份有限公司 | Electric exhaust gas recirculation (EGR) valve having double-direction adjustable air outlet |
| CN105971778A (en) * | 2016-07-28 | 2016-09-28 | 无锡隆盛科技股份有限公司 | Sealing heat-insulation gasket applied to electric EGR valve |
| CN107654687A (en) * | 2017-08-03 | 2018-02-02 | 中国核电工程有限公司 | A kind of pulse valve for radioactivity |
| CN109630696A (en) * | 2019-01-06 | 2019-04-16 | 重庆欣天利智能重工有限公司 | A kind of high-temperature resistant electric butterfly valve |
-
2004
- 2004-09-01 CN CNU2004200824605U patent/CN2755297Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101501380B (en) * | 2006-08-02 | 2012-10-10 | 博格华纳公司 | Egr system and egr valve with integrated pressure sensor |
| CN101949340A (en) * | 2010-03-11 | 2011-01-19 | 哈尔滨安龙迪环保科技有限公司 | Electrical control EGR valve for reducing working temperature and improving working reliability |
| CN101949340B (en) * | 2010-03-11 | 2019-02-22 | 哈尔滨安龙迪环保科技有限公司 | A kind of electric control EGR valve for reducing operating temperature and improving functional reliability |
| CN102032379A (en) * | 2010-12-28 | 2011-04-27 | 北京华通兴远供热节能技术有限公司 | Control valve |
| CN103133190A (en) * | 2013-03-15 | 2013-06-05 | 第一拖拉机股份有限公司 | Electric exhaust gas recirculation (EGR) valve having double-direction adjustable air outlet |
| CN105971778A (en) * | 2016-07-28 | 2016-09-28 | 无锡隆盛科技股份有限公司 | Sealing heat-insulation gasket applied to electric EGR valve |
| CN107654687A (en) * | 2017-08-03 | 2018-02-02 | 中国核电工程有限公司 | A kind of pulse valve for radioactivity |
| CN109630696A (en) * | 2019-01-06 | 2019-04-16 | 重庆欣天利智能重工有限公司 | A kind of high-temperature resistant electric butterfly valve |
| CN109630696B (en) * | 2019-01-06 | 2024-04-26 | 重庆欣天利智能重工有限公司 | High temperature resistant electric butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |