CN203009101U - Valve rod rotating limit device applied to exhaust gas recirculation (EGR) valve - Google Patents
Valve rod rotating limit device applied to exhaust gas recirculation (EGR) valve Download PDFInfo
- Publication number
- CN203009101U CN203009101U CN2012206919730U CN201220691973U CN203009101U CN 203009101 U CN203009101 U CN 203009101U CN 2012206919730 U CN2012206919730 U CN 2012206919730U CN 201220691973 U CN201220691973 U CN 201220691973U CN 203009101 U CN203009101 U CN 203009101U
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- valve
- valve rod
- egr
- limit device
- rod rotating
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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)
Abstract
The utility model relates to a valve rod rotating limit device applied to an exhaust gas recirculation (EGR) valve. The valve rod rotating limit device is characterized by comprising a valve body and a driven gear, wherein a valve rod is arranged in the driven gear which is an incomplete gear, and a stopping block is arranged on the driven gear. A limit block is arranged on the valve body. The valve rod rotating limit device has the advantages that a rotating angle of the valve rod is limited to be -90 to 90 degrees so as to be matched with a fully open state and a fully closed state of a valve port, and controllability of flow is increased.
Description
Technical field
The utility model relates to a kind of limit stoper.Be particularly suitable for using in the EGR valve on vapour, diesel engine.
Background technique
The EGR technology introduction:
The EGR technology, namely EGR Technology (Exhaust Gas Recycle) is the Exhaust gas purifying device that arranges for motor harmful gas (NOx).It enters the engine chamber burning after the waste gas after in motor, a part is burnt is entered suction tude and fresh air mixes through secondary cycle again, to slow down the combustion process of burning indoor fuel gas, suitably the control combustion temperature, reduce thereby reach the purpose that NOx discharges.
The EGR valve is exactly the key element of controlling the secondary exhaust gas air inflow, because the secondary exhaust gas air inflow needs immediately accurately to control: Engine ECU is according to the parameter such as the rotating speed of motor, load (throttle opening), temperature, charge flow rate, delivery temperature and calculate, the output required control signal PWM of EGR valve (high-frequency impulse), and then the aperture of control valve, thereby control engine part flow waste gas also enters gas handling system through the EGR valve, and enters cylinder after mixed gas mixes and participates in burning.This part waste gas enters the burning that cylinder participates in mixed gas, the temperature when having reduced burning in cylinder.Because NOx generates under high-temperature oxygen-enriched condition, thus the generation of NOx suppressed, thus reduced the content of the NOx in the complete machine exhaust.But excessive waste gas participates in recirculation, will affect the catching fire of mixed gas, performance, thereby affects the power character of motor, and particularly when engine idle, low speed, little load and cold machine, the waste gas of recirculation can affect engine performance significantly.So during at idling, low speed, little load and cold machine, ECU controls waste gas and does not participate in recirculation, avoids engine performance to be affected when motor; When motor surpasses certain rotating speed, loads and reaches certain temperature, ECU controls small part waste gas and participates in recirculation, and the exhausted air quantity that participates in recirculation is according to the difference of engine speed, load, temperature and exhaust gas temperature and difference is minimum with the NOx that reaches in waste gas.
In said process, the EGR valve has been brought into play huge effect as the executive component of a key.The valve EGR of present stage roughly is divided into slat belt and lifting type, and wherein lifting type EGR valve, simple in structure with it, and cost is low, and manageable advantage has been captured most markets.
Lifting type EGR valve is the aperture that the stroke of the axial motion of dependence valve rod assembly is being controlled valve, due to the basic reason of its design, exists following deficiency in use:
1. due to a large amount of carbon being arranged in engine exhaust, the valve body content is prone to the carbon distribution phenomenon so, especially between valve rod and guide sleeve, carbon distribution to a certain extent, valve rod will cause due to the increase of frictional force and can't move, and then whole valve is scrapped.
Valve adopts hoisting way simultaneously, in the course of the work, at the easy carbon distribution of sealing surface, causes leakage, affects engine work.Be that life of product is used shorter.
2. position transducer moves up and down with valve, and there is wear phenomenon in its motion part, affects output accuracy.
3. the relation of valve opening and gas flow is non-linear, is unfavorable for the accurate control of flow.
4. the valve port air inlet is the circumference intake method, and vapour lock is large, makes the valve outlet exhaust pressure on the low side, does not reach the suction pressure of motor.
5. the carbon distribution in valve, do not have self-cleaning parts.
6, in the device of whole valve, high and contain impurity due to delivery temperature, so runner must be realized isolation and heat insulation with control system, the convertible EGR valve of present stage and lifting type EGR valve have only been used a guide sleeve sealing, sealing effect is poor, and the gas of leakage tends to cause control system malfunctioning.Simultaneously, the axial motion mode is large to the wearing and tearing of Sealing, affects life of product.
Based on to the improved needs of above-mentioned shortcoming, my company has newly developed revolving EGR valve, the axial motion of valve rod is changed into rotatablely move, and is controlling valve port by corresponding part, so, for rotatablely moving of valve rod, should be used in conjunction with by the Constrained parts.
Summary of the invention
The purpose of this utility model is to provide a kind of valve rod rotating limit device of the EGR of being applied to valve to make up the deficiency of prior art.
The technical solution adopted in the utility model is: be applied to the valve rod rotating limit device of EGR valve, it is characterized in that: comprise valve body and driven gear, valve rod is arranged in driven gear, is provided with block on driven gear; Be provided with limiting stopper on valve body.
The described valve rod rotating limit device that is applied to the EGR valve is characterized in that: driven gear is partial gear.
The beneficial effects of the utility model are: the rotation angle that the utility model has limited valve rod is ± 90 degree, to coordinate standard-sized sheet and the full-shut position of valve port, has increased the controllability of flow.
Description of drawings
Fig. 1 is the structural representation of EGR valve.
Fig. 2 is the cross-sectional view of EGR valve.
Fig. 3 is the internal structure 3-D view of EGR valve.
Fig. 4 is the 3-D view of the another one angle of Fig. 3.
Fig. 5 is figure 3-D view of the present utility model.
Fig. 6 is sealing configuration and preloading spring structural representation.
Fig. 7 is the partial enlarged drawing of Fig. 6.
Fig. 8 is the seal ring structure schematic diagram.
Fig. 9 is flap and valve seat cooperating structure schematic diagram.
Embodiment
Embodiment:
In the drawings, 1 is lower valve body, and 2 is flap, 3 is valve seat, and 4 is valve rod, and 5 is thermal insulating pad, 6 is lower sealing ring, and 7 is guide sleeve, and 8 is upper sealing ring, 9 is bearing, and 10 is spring seat, and 11 is reduction torsion spring, 12 is preloading spring, 13 is upper valve body, and 14 is the transmission speed reducer structure, and 15 is non-contact position sensor.
Course of action of the present utility model is:
Assumed initial state: valve is in full-shut position.Sector open 21 on flap 2 and the sector open 22 on valve seat 3 are at all not overlapping on vertical plane.
On motor 16, the gear 17 of axle rotates, driving transmission speed reducer structure 14 rotates, on transmission speed reducer structure 14 by after gear 18,19 decelerating effect with transmission of torque to partial gear 20, because partial gear is arranged on valve rod 4, so valve rod 4 can rotate, and the flap 2 that drives its lower end installation rotates, and valve seat 3 keeps motionless, like this, sector open 21 on flap 2 and the sector open 22 on valve seat 3 meeting beginning on vertical plane is overlapping, and exhaust will be expelled to air outlet 24 through these faying surfaces from suction port 23.In fact, flap 2 and valve seat 3 have just formed valve port.Simultaneously, moving part flap 2 being arranged on the below, is also to make air flow direction be conducive to fit closely.
Along with the rotation angle increase of valve rod 4, valve port also increases thereupon.When maximum aperture is valve rod 4 half-twist, for the ease of the controllability of flow, being provided with block 24 on 20 on partial gear, is provided with two limiting stoppers 25 simultaneously on upper valve body 13 and coordinates with it; The rotation angle that limiting stopper 25 has been controlled valve rod 4 is 90 degree.
Between valve rod 4 and upper valve body 13, reduction torsion spring 11 is installed, reduction torsion spring 11 is torsion spring, purpose is to provide for valve rod 4 torsional moment that resets: when valve rod 4 rotates, reduction torsion spring 11 can rotate thereupon, and produces torsional deflection, when the reset torque of the moment of torsion of valve rod 4 and reduction torsion spring 11 is identical, will remain on this aperture, when the moment of valve rod 4 continued to increase, aperture can increase thereupon, until maximum opening.When if the moment of valve rod 4 reduces, under the effect of the reset torque of reduction torsion spring 11, aperture can reduce thereupon, until close fully.Can find out, the torque of valve rod 4 is depended in fact in the variation of above-mentioned aperture, namely be subjected to the action control of motor 16, and motor is controlled by ECU, in ECU integrated treatment total data process, contactless position driver 15 is transmitting the timely information data of valve rod 4 rotation angles (aperture) all the time reliably.
Should fit all the time between flap 2 and valve seat 3 closely, just can avoid leaking, for this reason, we tentatively imagine between upper valve body 13 and valve rod 4 and are provided with preloading spring 12,12 pairs of valve rods 14 of preloading spring have the effect of lifting, will make like this flap 2 receive power upwards, reach the effect closely of fitting.In addition, upper valve body 13 transfixions, valve rod 4 has rotational action, at moving part with preloading spring 12 is not installed between moving part, can affect the pretension effect, so, we have overlapped bearing 9 on valve rod 4, mounting spring seat 10 on bearing 9 outer rings is installed preloading spring 12 again between spring seat 10 and upper valve body 13, like this with regard to the perfect problem that solved: no matter how valve rod 4 rotates, spring seat 10 remains motionless.
Sector open 21 on flap 2 and the design of the sector open 22 on valve seat 3 be science very also: we are by calculating, when the opening 21 that cooperatively interacts and opening 22 be designed to fan-shaped after, realized aperture and changes in flow rate close to linearity, made the Flow-rate adjustment control accuracy of valve close to linearity.With respect to the intake method of lifting type and slat belt, reduce the vapour lock of air inlet simultaneously, improved the outlet exhaust pressure.
In the utility model, valve seat 3 lower surfaces (faying surface) are provided with scraping article 23, and when flap 2 rotated, the carbon distribution of the upper alluvial of 23 pairs of flap 2 upper surfaces of scraping article (faying surface) had the effect of scraping, has had self-cleaning function.
In practical work process, product in the past: a part of exhaust meeting enters into control system along valve rod 4 and thermal insulating pad 5, valve rod 4 with guide sleeve 7 gaps, make the alluvial of control system temperature distortion or carbon distribution, thereby cause whole valve to be scrapped, we are provided with upper sealing ring 8 and lower sealing ring 6 in guide sleeve 7, the lip of upper sealing ring 8 and lower sealing ring 6 valve rod of tightly fitting reduces the exhaust gas leakage amount effectively, has extended product working life.Guide sleeve 7 is primary seal, and upper sealing ring 8 and lower sealing ring 6 are secondary seal.Certainly, as required, seal ring can also be accelerated.
Claims (2)
1. be applied to the valve rod rotating limit device of EGR valve, it is characterized in that: comprise valve body and driven gear, valve rod is arranged in driven gear, is provided with block on driven gear; Be provided with limiting stopper on valve body.
2. the valve rod rotating limit device that is applied to the EGR valve as claimed in claim 1, it is characterized in that: driven gear is partial gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206919730U CN203009101U (en) | 2012-12-14 | 2012-12-14 | Valve rod rotating limit device applied to exhaust gas recirculation (EGR) valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206919730U CN203009101U (en) | 2012-12-14 | 2012-12-14 | Valve rod rotating limit device applied to exhaust gas recirculation (EGR) valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203009101U true CN203009101U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206919730U Expired - Lifetime CN203009101U (en) | 2012-12-14 | 2012-12-14 | Valve rod rotating limit device applied to exhaust gas recirculation (EGR) valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203009101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111356831A (en) * | 2017-10-04 | 2020-06-30 | 法雷奥电机控制***公司 | Actuator and fluid circulation valve comprising same |
-
2012
- 2012-12-14 CN CN2012206919730U patent/CN203009101U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111356831A (en) * | 2017-10-04 | 2020-06-30 | 法雷奥电机控制***公司 | Actuator and fluid circulation valve comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |