CN2627313Y - Rectilinear motor-driven exhaust gas recirculation valve - Google Patents
Rectilinear motor-driven exhaust gas recirculation valve Download PDFInfo
- Publication number
- CN2627313Y CN2627313Y CN 03259097 CN03259097U CN2627313Y CN 2627313 Y CN2627313 Y CN 2627313Y CN 03259097 CN03259097 CN 03259097 CN 03259097 U CN03259097 U CN 03259097U CN 2627313 Y CN2627313 Y CN 2627313Y
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- China
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- assembly
- valve
- displacement transducer
- valve body
- exhaust gas
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Abstract
The utility model relates to an exhaust gas recirculation valve with linear motor driving type, which is used to be arranged on the automobile, providing the decrease of NOx discharge capacity in the exhaust pollutants for vehicle engines. The utility model mainly adopts the method that the upper side of a valve body assembly is provided with an assembly of linear motor and displacement transducer; a press plate and a sealing cover are connected between the valve body and the linear motor; a closed spring and a pillar are arranged in the sealing cover; the upper part of a valve rod is inserted into the inner part of the assembly of linear motor and displacement transducer to be matched and connected. The utility model has simple, compact, and reasonable structure; good sealability, rapid reaction, stable performance, high precision degree, good reliability, low noise, as well as long service life, which can meet the discharging requirements of gasoline engines with 0.6-4.5 L and diesel engines with 1-10 L, in order to support the engines with above discharge capacity, the NOx discharge capacity in the exhaust pollutants can be decreased for more than 80 per cent than the original.
Description
Technical field:
The utility model relates to a kind of straight line motor drive type exhaust gas recirculation valve, is used to be installed in automobile, reduces NO in the exhaust contaminant for vehicular engine provides
xDischarge amount.
Background technique:
Before the utility model is made, in prior art,, motor car engine reduces NO in the exhaust contaminant for providing
xThe device of discharge amount is traditional mechanical type air-pressure type (negative pressure, malleation) drive-type exhaust gas recirculation valve.The air-pressure type of this kind structure (negative pressure, malleation) drive-type exhaust gas recirculation valve can not satisfy the requirement of accurate control amount of exhaust gas recirculation, also be difficult to satisfy the above emission standard of national regulation " Europe 3 ", its product stability is poor, and precision is low, noise is big, and working life is low.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned deficiency, thereby provides a kind of simple, compact and reasonable for structure; Be swift in motion, good stability can satisfy 0.6～4.5 liter petrol engine and 1～10 liter diesel emission needs, can be supporting for the motor of above discharge capacity, and can reduce NO in the exhaust contaminant
xThe straight line motor drive type exhaust gas recirculation valve of discharge amount.
Main solution of the present utility model is achieved in that
The utility model mainly adopts linear electric motor 20 and displacement transducer assembly 10 is installed above valve body below the valve body assembly 1, linear electric motor 20 tops are connected with displacement transducer assembly 10, pressured plate 4 is connected with sealing cover 5 between valve body assembly below valve body 1 and the linear electric motor 20, sealing spring 17 and pillar 16 are housed in sealing cover 5, and the top of the valve rod 15 in the valve body assembly extend into linear electric motor 20 and is connected with displacement transducer assembly 10 inner matching with it.
The utility model linear electric motor 20 are made up of the utmost point 11, armature core 12 on the utmost point 6, coil assembly 8, radome 7, the stator under shell 9, the stator.In that the utmost point 11 on the utmost point 6 under the stator, coil assembly 8, the stator is housed between radome 7 and the shell 9, armature core 12 is housed, nut 13, back-up ring 14 in radome 7.
In the utility model position transducer assembly 10 displacement transducer feeler lever 19 is housed, displacement transducer feeler lever 19 contacts with the last plane of valve rod 15.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; Can promote the aperture that valve rod be controlled an one-way valve by linear electric motor, can make valve rod in stroke range, be parked in any one position, aperture that promptly can control valve according to the different linear electric motor electric current of control; Good airproof performance, be swift in response, stable performance, precision height, good reliability, noise be low, long service life, can satisfy 0.6～4.5 liter petrol engine and 1～10 liter diesel emission needs, for the motor of above discharge capacity supporting, can make automobile satisfy national specified discharge standard, after system optimization, NO in the exhaust contaminant
xDischarge amount can not reduce more than 80% when adorning this valve originally, and had improved fuel economy under partial load condition.
Description of drawings:
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model structure plan view;
Embodiment:
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
In the present embodiment, the utility model straight line motor drive type exhaust gas recirculation valve (is called for short: linear electric motor EGR valve).
The utility model linear electric motor EGR valve is mainly formed (concrete structure is seen figure one) by valve body assembly, linear electric motor and displacement transducer assembly.Valve body assembly mainly is made up of the valve body 1 of below and valve seat 2, valve rod 15, the stem guiding cover 3 of valve inner.Linear electric motor 20 and displacement transducer assembly 10 are installed above valve body 1.Rely on pressing plate 4 to be connected between valve body 1 and the linear electric motor 20 with sealing cover 5 usefulness crosshead small pan head screws 18.Sealing spring 17 and pillar 16 are arranged in sealing cover 5.The top of the valve rod 15 in the assembly valve body extend into linear electric motor 20 and is connected with position transducer assembly 10 inner matching with it.Linear electric motor 20 are made up of parts such as the utmost point 11, armature core 12 on the utmost point 6, coil assembly 8, radome 7, the stator under the shell 9 of outside and the inner stator.In that the utmost point 11 on the utmost point 6 under the stator, coil assembly 8, the stator is housed between radome 7 and the shell 9, armature core 12, nut 13, back-up ring 14 are housed in radome 7.Set screw nut 13, the back-up ring 14 of armature core 12 by inside matches with the upper end of valve rod 15 and is connected.Linear electric motor 20 tops are connected with position transducer assembly 10 and are integral.At position sensor unit 10 inner installation position displacement sensor feeler levers 19.Displacement transducer assembly 10 relies on the last plane of its inner displacement transducer feeler lever 19 and valve rod 15 to contact.Linear electric motor 20 and displacement transducer assembly 10 are critical components of finishing the accurate Control work of EGR valve, therefore require their each parts palpus resolution height, good linearity, stable performance, reliable operation etc.
Working principle of the present utility model:
1. linear electric motor
Linear electric motor also claim linear electromagnet, proportion electro-magnet, its electric rotating machine different from the past and can only adhesive, the electromagnet of disconnection, be a kind of executive component that can accurately control straight-line displacement amount.Structure of the linear motion actuator is shown in figure one, and main structure comprises that an end has the stator iron core and the conical armature core of taper, is made up of thin screen layer of layer and coil etc. between stator and the armature.Because its special magnetic structure, make that the displacement amount of armature core axial linear movement and average current that coil midstream is crossed are proportional.The next accurate control flows of Sampling (PWM) method commonly used is crossed the average current in the coil in the practical application, the influence that simultaneously also can remove the iron core hysteresis effect, so just can finish the position quantity of accurate control armature core, thereby simultaneously because armature core drives the aperture that valve rod reaches control EGR valve.
2. displacement transducer
The reseat pressure spring of resin linear potentiometer that displacement transducer is mainly higher by linear precision, the life-span is long and rigidity, good linearity is formed.The slide bar of linear potentiometer directly contacts the valve rod upper end of EGR, the displacement that is used for measuring valve rod, thus can measure the aperture of valve.
Working procedure of the present utility model:
The task of EGR valve is according to the requirement of Under Different Work Condition of Engine to amount of exhaust gas recirculation, regulates the lift of exhaust gas recirculation path valve rod 15, to regulate amount of exhaust gas recirculation.Amount of exhaust gas recirculation is most important to normal working of engine and exhaust gas purification, concerning an engine operating condition during the exhaust gas recirculation quantity not sufficient, and NO
xCatharsis is poor, does not reach the exhaust gas purification purpose, on the contrary, when amount of exhaust gas recirculation is excessive, influences normal working of engine, causes power to descend, and CH, CO discharge amount increase, and therefore, requires accurately control EGR circulating load.In addition, when automobile is on the way exercised, engine speed and load variations multiterminal, pace of change is fast, requires EGR circulating load control rate fast.Therefore, satisfactorily reach above-mentioned requirements, solve two problems.The one, by engine test, determine needed amount of exhaust gas recirculation under the Under Different Work Condition of Engine (these data are stored in the Engine ECU database, send instruction for ECU by these data), this is context engine work; The 2nd, the EGR valve can rapidly, accurately be controlled amount of exhaust gas recirculation on request, and the control of valve rod 15 lifts of EGR exhausted air quantity control valve just wants degree of accuracy height, speed fast.
ECU and drive circuit are started in the cooperation of linear electric motor EGR valve, can rapidly, accurately control the lift of valve rod.After 8 li coils of coil assembly feed the increase electric current that requires, by the utmost point under the stator 6, the last utmost point 11, formation such as armature core and air gap closed magnetic circuit also produces the magnetic intensity of corresponding enhancing, be that electromagnetic force increases, the attraction armature core moves up, promoting set screw nut 13 and displacement transducer feeler lever 19 moves up, set screw nut 13 is fixed on the valve rod 15 by back-up ring 14, therefore, valve rod 15 together moves up with set screw nut 13, simultaneously, displacement transducer exports also that the voltage signal of representing corresponding position is given ECU and the given signal of displacement compares judgement, so that rapidly, accurate and stable control stem position.When the elastic force of the return spring (not shown) on being installed in the displacement transducer feeler lever equated (promptly reaching desired position) with electromagnetic attraction, valve rod just remained unchanged on this position, so far finished the lift control of valve rod.The size of valve rod (lift) displacement distance is decided by the power of coil midstream excess current.When reducing valve rod 15 lifts, reduce the electric current in the coil in the coil assembly 8, because magnetic intensity weakens, be that electromagnetic attraction reduces, the spring-back force of the return spring of displacement transducer feeler lever 9 is greater than the suction of armature core 12, armature core and follower set screw nut 13, valve rod 15 etc. and displacement transducer feeler lever 19 move down, and stem position remains unchanged when return spring elastic force and electromagnetic force reach balance (promptly reaching desired position).Finish valve rod 15 and fall the journey process.Like this, promptly and accurately and the position of stable control valve rod, promptly the aperture of EGR valve has guaranteed accurate control amount of exhaust gas recirculation.
Claims (3)
1, a kind of straight line motor drive type exhaust gas recirculation valve, comprise valve body assembly, it is characterized in that adopting the top of valve body (1) below valve body assembly that linear electric motor (20) and displacement transducer assembly (10) are installed, linear electric motor (20) top is connected with displacement transducer assembly 10, pressured plate 4 is connected with sealing cover (5) between valve body assembly below valve body (1) and the linear electric motor (20), sealing spring (17) and pillar (16) are housed in sealing cover (5), and the top of the valve rod in the valve body assembly (15) extend into linear electric motor (20) and is connected with inner the matching with it of displacement transducer assembly (10).
2, straight line motor drive type exhaust gas recirculation valve according to claim 1 is characterized in that described linear electric motor (20) are made up of the utmost point (11), armature core (12) on the utmost point (6), coil assembly (8), radome (7), the stator under shell (9), the stator.In that the utmost point (11) on the utmost point under the stator (6), coil assembly (8), the stator is housed between radome (7) and the shell (9), armature core (12) is housed, nut (13), back-up ring (14) in radome (7).
3, straight line motor drive type exhaust gas recirculation valve according to claim 1 is characterized in that being equipped with in the described position transducer assembly (10) displacement transducer feeler lever (19), and displacement transducer feeler lever (19) contacts with the last plane of valve rod (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03259097 CN2627313Y (en) | 2003-06-27 | 2003-06-27 | Rectilinear motor-driven exhaust gas recirculation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03259097 CN2627313Y (en) | 2003-06-27 | 2003-06-27 | Rectilinear motor-driven exhaust gas recirculation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2627313Y true CN2627313Y (en) | 2004-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03259097 Expired - Fee Related CN2627313Y (en) | 2003-06-27 | 2003-06-27 | Rectilinear motor-driven exhaust gas recirculation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2627313Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278212A (en) * | 2011-04-28 | 2011-12-14 | 上海交通大学 | Device for controlling residual waste gas quantity in gasoline engine cylinder |
| CN102937084A (en) * | 2012-10-30 | 2013-02-20 | 合肥通用机械研究院 | Air volume regulating system for compressor |
| CN103174551A (en) * | 2013-03-28 | 2013-06-26 | 无锡隆盛科技股份有限公司 | Built-in coil structure of motor-driven exhaust gas recirculation (EGR) valve of gasoline engine |
| CN103322269A (en) * | 2013-07-01 | 2013-09-25 | 上海理工大学 | Electric actuating mechanism driven by cylindrical linear motor |
| CN103779038A (en) * | 2014-01-27 | 2014-05-07 | 北京阳铭诚科技有限责任公司 | Thrust maintaining electromagnet |
| CN104373252A (en) * | 2014-08-01 | 2015-02-25 | 安徽天利动力股份有限公司 | EGR valve mechanism provided with cooling cavity |
| CN105135028A (en) * | 2015-10-08 | 2015-12-09 | 北京工业大学 | Voice-coil-motor-driven high-speed switch valve |
-
2003
- 2003-06-27 CN CN 03259097 patent/CN2627313Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278212A (en) * | 2011-04-28 | 2011-12-14 | 上海交通大学 | Device for controlling residual waste gas quantity in gasoline engine cylinder |
| CN102937084A (en) * | 2012-10-30 | 2013-02-20 | 合肥通用机械研究院 | Air volume regulating system for compressor |
| CN103174551A (en) * | 2013-03-28 | 2013-06-26 | 无锡隆盛科技股份有限公司 | Built-in coil structure of motor-driven exhaust gas recirculation (EGR) valve of gasoline engine |
| CN103322269A (en) * | 2013-07-01 | 2013-09-25 | 上海理工大学 | Electric actuating mechanism driven by cylindrical linear motor |
| CN103322269B (en) * | 2013-07-01 | 2015-11-18 | 上海理工大学 | The electric actuator that cylinder type linear motor drives |
| CN103779038A (en) * | 2014-01-27 | 2014-05-07 | 北京阳铭诚科技有限责任公司 | Thrust maintaining electromagnet |
| CN103779038B (en) * | 2014-01-27 | 2016-07-13 | 北京阳铭诚科技有限责任公司 | Thrust keeps electric magnet |
| CN104373252A (en) * | 2014-08-01 | 2015-02-25 | 安徽天利动力股份有限公司 | EGR valve mechanism provided with cooling cavity |
| CN105135028A (en) * | 2015-10-08 | 2015-12-09 | 北京工业大学 | Voice-coil-motor-driven high-speed switch 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 |