CN201908748U - Exhaust gas recirculation valve - Google Patents
Exhaust gas recirculation valve Download PDFInfo
- Publication number
- CN201908748U CN201908748U CN2011200097189U CN201120009718U CN201908748U CN 201908748 U CN201908748 U CN 201908748U CN 2011200097189 U CN2011200097189 U CN 2011200097189U CN 201120009718 U CN201120009718 U CN 201120009718U CN 201908748 U CN201908748 U CN 201908748U
- Authority
- CN
- China
- Prior art keywords
- exhaust gas
- gas recirculation
- valve
- recirculation valve
- lift part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
Abstract
The utility model mainly discloses an exhaust gas recirculation valve, which mainly comprises a valve body, a valve rod component, a rotary elevating switching mechanism, a resetting component and a rotating device, wherein the valve body is connected with an exhaust gas recirculation pipeline of an internal combustion engine; the valve rod component is arranged in the center of the valve body; the rotary elevating switching mechanism is connected onto the valve rod component; and the rotating device is connected with the rotary elevating switching mechanism. The exhaust gas recirculation valve is characterized in that: the rotating device is a motor, and a rotating shaft of the motor is directly and rigidly connected with the rotary elevating switching mechanism, so that a power transfer process is simplified, the number of parts is reduced, the reliability of the exhaust gas recirculation valve is enhanced, and cost is lowered.
Description
Technical field
The utility model relates to a kind of exhaust gas recirculation valve that is installed on the engine exhaust gas recirculating line.
Background technique
Aspect solution internal-combustion engine discharged nitrous oxides, adopt the EGR Technology effect obvious, therefore approved, and applied by More and more factories.Exhaust gas recirculation valve is the key components and parts of EGR Technology, by the flow of exhaust gas recirculation valve regulation exhaust gas recirculation, realizes the required amount of exhaust gas recirculation of each operating mode of internal-combustion engine.
A kind of exhaust gas recirculation valve is disclosed in patent CN200410082099, utilize one or more levels gear train to transmit rotatablely moving of motor, the conversion that rotatablely moves and keep straight on and move by the realization of rotation and lifting conversion equipment again, by gear train transferring rotational motion structure more complicated, volume is not easy to reduce.
Summary of the invention
The purpose of this utility model provides that a kind of rotation-linear motion conversion mechanism is more succinct, the more compact and reliable exhaust gas recirculation valve of structure.
The exhaust gas recirculation valve that the utility model is described, mainly comprise the valve body, the valve rod assembly that is installed in the valve body center that are connected with the engine exhaust gas recirculating line, be connected rotation and lifting switching mechanism and reset components on the valve rod assembly, and the whirligig that is connected with rotation and lifting switching mechanism, it is characterized in that: described whirligig is a motor, and the running shaft of motor is direct and the rotation and lifting conversion equipment is rigidly connected.Because the running shaft of motor directly is connected with the rotation and lifting conversion equipment, other component of middle transmission have been omitted, the rotating power of motor is directly passed to rotation and lifting switching mechanism, change the used mechanism of axial linear movement complicated problems into thereby having solved rotatablely moves, and the valve rod parts that can realize exhaust gas recirculation valve equally lifting action flexibly.
The rotation and lifting conversion equipment of exhaust gas recirculation valve comprises a cam disk and Lift Part.Motor provides rotating power as whirligig, can select for use stepper motor as preferred motor.Since electric machine rotational axis directly with the rotation and lifting conversion equipment in cam disk be rigidly connected, the rotating power of electric machine rotational axis output is delivered on the cam disk, drives cam disk and rotates.Being rigidly connected of electric machine rotational axis and cam disk, the described modes such as can adopting interference fit, pin connection, key connection or welding that is rigidly connected.And this cam disk has at least one cam working face that distributes at circumferencial direction, and when cam working face during more than, this working surface can along the circumferential direction evenly distribute, and also can adopt non-uniform Distribution according to actual conditions.Cam disk keeps contacting all the time by reset components with Lift Part, the cam working face of cam disk is in rotary course, make the Lift Part of contact with it produce displacement, thereby make rotatablely moving of electric machine rotational axis change the straight line motion of Lift Part in the stem movement direction.The valve rod assembly of exhaust gas recirculation valve because Lift Part is ined succession (component of valve rod and valve), valve rod assembly makes the valve on the valve rod assembly move between closed position and maximum open position in the displacement of stem movement direction, motor by external control system control can rotate corresponding angle as required, corresponding is exactly the corresponding displacement of valve, realizes the adjusting of valve opening size.
Motor is connected with the exhaust gas recirculation valve body by thermal insulating pad, helps reducing high-temp waste gas that internal-combustion engine discharges and is delivered to the heat of motor side by the exhaust gas recirculation valve body, and motor and valve body are connected and fixed by screw.Wherein thermal insulating pad can adopt more weak and material heatproof of the capacity of heat transmission to make; Also can adopt sheet metal, but can reduce heat transfer area and reach usage requirement by removing the part material in order to reduce heat transfer.
The exhaust gas recirculation valve body has an inner chamber, a guide pad or pin are installed on the body cavity wall, the Lift Part that matches with the body cavity shape has a guiding groove in external frame upper edge stem movement direction, this guiding groove and guide pad or guide finger match, and Lift Part can be moved in the stem movement direction but can not rotate.Foregoing cam disk promotes Lift Part by the cam work surface and moves axially along guide pad in rotary course, reset components is compressed simultaneously.The reset components that is connected with valve rod assembly, cam disk keeps contacting all the time by reset components with Lift Part.Usually select for use elastic element as reset components, as helical spring; Adopt helical spring as reset components, when exhaust gas recirculation (egr) valve was in the closed position, helical spring was given the preload pressure of valve to set, and guarantees reliably closing of valve.Also having a function simultaneously is exactly that helical spring is compressed when the cam disk rotation promotes Lift Part toward the motion of valve open direction, and the reaction force of spring guarantees that cam disk and Lift Part keep contacting all the time.Be evenly distributed to few cam working face at above-mentioned cam disk circumferencial direction, being one at projecting direction after cam working face launches has the fixedly straight line of lift angle, but is not limited to straight line.The cam working face of cam disk circle distribution and Lift Part operation point constitute a pair of friction pair, corresponding one by one, and keep being adjacent to, the thrust that rotatablely moves is delivered on the Lift Part uniformly by equally distributed each operation point, guarantees that valve rod assembly moves stably in the stem movement direction.
In above-mentioned scheme, during the cam disk rotation, be the rotating force that transmits cam disk with sliding friction between the Lift Part operation point of cam working face and contact with it, so frictional force can be bigger, energy loss is more.Therefore in such scheme, by radially bearing being installed by straight pin at described Lift Part, by this bearing top circle week keeping contacting all the time with the cam working face of cam disk, frictional behaviour between the Lift Part operation point that utilizes bearing to improve cam working face and contact with it, this effect is very obvious.For this bearing is installed, the upper-end surface of Lift Part processes circular groove one, and bearing is installed in the circular groove between the Lift Part Internal and external cycle by straight pin, and number of bearings is corresponding with friction pair quantity.
Description of drawings
Can more clearly set forth the annexation between technical characterstic that the utility model relates to, related each functional entity in conjunction with the accompanying drawings.
Fig. 1 is the exhaust gas recirculation valve sectional view of no bearing;
Fig. 2 is the exhaust gas recirculation valve sectional view vertical with Fig. 1 projecting direction;
Fig. 3 is the exhaust gas recirculation valve sectional view that tape spool holds;
Fig. 4 is the cam disc profile figure in the rotation and lifting switching mechanism;
Fig. 5 is the profile unfolded drawing of cam disk;
Fig. 6 is the exhaust gas recirculation valve sectional view that adopts the integrated type valve body structure.
Embodiment
From the structure shown in the sectional view of accompanying drawing 1 and accompanying drawing 2 is the embodiment of scheme noted earlier, exhaust gas recirculation valve adopts and divides body structure from figure, form by upper valve body 16 and following valve body 10, add a thermal insulating pad 13b up and down between the valve body, selecting for use of thermal insulating pad 13b can be with reference to the thermal insulating pad 13a between motor described in the summary of the invention and valve body, two thermal insulating pads are all selected the asbestos packing of two sides band metallic coating in the present embodiment, and upper valve body 16 is connected by screw 7 with following valve body 10; Meanwhile, select stepper motor 12 as whirligig.Can visually see from accompanying drawing, the running shaft 15 of stepper motor 12 directly is connected with the cam disk 1 of rotation and lifting switching mechanism, and Placement is by screw 14 cam disk 1 to be fastened on the running shaft 15.Guide sleeve 8 is installed in the center of upper valve body 16 and following valve body 10, and valve rod 9 slides in guide sleeve 8 flexibly.Angle of swing according to the different adjustment stepper motor 12 of engine conditions, corresponding with it cam disk 1 same rotation equal angles, the cam disk angle of swing is the stem movement direction displacement amount of corresponding Lift Part one by one, and the displacement of valve rod assembly just is the valve opening of exhaust gas recirculation valve.Adopt circumferencial direction evenly to arrange the cam disk 1 of two cam working faces among Fig. 4 and Fig. 5 as can be seen in the present embodiment, Fig. 5 shows that the cam disk cam working face in this implementation column launches the back and shows it is that a lift angle is the straight line of 15 degree at projecting direction.
Shown in Fig. 2, Lift Part 20 has the guiding groove 17 of valve rod 9 moving direction on periphery, and what cooperate with guiding groove 17 is a guide pad 19, and guide pad 19 is by adopting the mode of interference fit to be connected with a circular mounting hole of upper valve body 16 radial arrangement.Lift Part 20 behind the pressure that is subjected to the cam disk that bearing 5 and straight pin 4 transmit, the displacement that can produce valve rod 9 moving direction.The top of valve rod 9 contacts with the lower end surface of Lift Part 20, and it is exactly the aperture of valve 11 that Lift Part 20 directly is reflected on the valve rod assembly (valve rod 9 and valve 11) in the displacement of stem movement direction.Valve rod 9 top mounting spring seats 18, spring seat 18 helical spring 6 of ining succession is set the pretightening force of valve by the pre compressed magnitude of adjusting helical spring 6, guarantees the sealing of valve 11 and following valve body 10.Valve rod 9 on the valve rod assembly and valve 11 adopt and are rigidly connected, and adopt interference fit to connect in the present embodiment, also can adopt modes such as riveted joint, welding to connect.
Design has exhaust gas inlet 22 on following valve body 10, links to each other with the internal-combustion engine vent-pipe lateral line; Also have a waste gas outlet 21, be connected with the intake lines of combustion engines lateral line.
Can realize simplifying being connected between whirligig and the rotation and lifting switching mechanism by the foregoing description, remove and be used for other component that whirligig transmits rotating force, and can realize that waste gas enters the quantitative control of suction tude side from the outlet pipe side.
Fig. 3 is a kind of improvement embodiment of previous embodiment, in order to improve the thrust transmission effect between cam disk 1 and the Lift Part 20, Lift Part 20 upper-end surfaces are provided with circular groove one, bearing 5a and 5b distribute and are installed in the outer ring 2 and the circular groove between the inner ring 3 of Lift Part 20 by straight pin 4a and 4b, and bearing 5a and 5b can roll on straight pin 4a and 4b flexibly.The cam working face of cam disk 1 contacts with 5b with bearing 5a on being arranged symmetrically in Lift Part, and when cam disk 1 rotation, applied thrust is given bearing 5a and 5b.By the present embodiment, can effectively improve the surface friction drag between cam disk 1 and the Lift Part 20, reduce energy loss, the flexibility of rotation and lifting conversion equipment can be effectively improved.
Exhaust gas recirculation valve shown in Figure 6 adopts the integrated type valve body, and cancellation thermal insulating pad 13b and connection be the screw 7 of valve body up and down, realizes the said function of mode of execution in the preamble, and highly can shorten.
The above embodiment; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also by the mode that makes up new embodiment be proposed to embodiment noted earlier; integrated type valve body scheme, tape spool such as no bearing part hold integrated type valve body scheme etc., and the new design proposal that these combinations utilize embodiment noted earlier to propose should be considered as protection domain of the present utility model.
Claims (8)
1. exhaust gas recirculation valve, mainly comprise the valve body, the valve rod assembly that is installed in the valve body center that are connected with the engine exhaust gas recirculating line, be connected rotation and lifting switching mechanism and reset components on the valve rod assembly, and the whirligig that is connected with rotation and lifting switching mechanism, it is characterized in that: described whirligig is a motor, and the running shaft of motor is direct and the rotation and lifting conversion equipment is rigidly connected.
2. exhaust gas recirculation valve as claimed in claim 1 is characterized in that: described motor is a stepper motor.
3. exhaust gas recirculation valve as claimed in claim 1 is characterized in that: described rotation and lifting conversion equipment comprises a cam disk and Lift Part.
4. exhaust gas recirculation valve as claimed in claim 3 is characterized in that: described cam disk has at least one cam working face that distributes at circumferencial direction.
5. exhaust gas recirculation valve as claimed in claim 3 is characterized in that: described Lift Part has a guiding groove in external frame upper edge stem movement direction.
6. exhaust gas recirculation valve as claimed in claim 3 is characterized in that: described cam disk keeps contacting all the time by reset components with Lift Part.
7. as claim 1,2,3,4,5 or the described exhaust gas recirculation valve of claim 6, it is characterized in that: described reset components is a helical spring.
8. as claim 3,4,5 or the described exhaust gas recirculation valve of claim 6, it is characterized in that: described Lift Part upper-end surface is provided with circular groove one, and bearing is installed in the circular groove of Lift Part by straight pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200097189U CN201908748U (en) | 2011-01-04 | 2011-01-04 | Exhaust gas recirculation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200097189U CN201908748U (en) | 2011-01-04 | 2011-01-04 | Exhaust gas recirculation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201908748U true CN201908748U (en) | 2011-07-27 |
Family
ID=44300951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200097189U Expired - Lifetime CN201908748U (en) | 2011-01-04 | 2011-01-04 | Exhaust gas recirculation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201908748U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661216A (en) * | 2012-06-04 | 2012-09-12 | 南岳电控(衡阳)工业技术有限公司 | Valve used for diesel engine exhaust gas recirculation system |
| ITUA20164688A1 (en) * | 2016-06-27 | 2017-12-27 | Magneti Marelli Spa | EXHAUST GAS RECIRCULATING VALVE ACTUATOR DEVICE (EGR) IN AN ENDOTHERMAL ENGINE AND ITS RELATIVE GAS VALVE GROUP OF EXHAUST GAS |
-
2011
- 2011-01-04 CN CN2011200097189U patent/CN201908748U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661216A (en) * | 2012-06-04 | 2012-09-12 | 南岳电控(衡阳)工业技术有限公司 | Valve used for diesel engine exhaust gas recirculation system |
| CN102661216B (en) * | 2012-06-04 | 2015-06-03 | 南岳电控(衡阳)工业技术有限公司 | Valve used for diesel engine exhaust gas recirculation system |
| ITUA20164688A1 (en) * | 2016-06-27 | 2017-12-27 | Magneti Marelli Spa | EXHAUST GAS RECIRCULATING VALVE ACTUATOR DEVICE (EGR) IN AN ENDOTHERMAL ENGINE AND ITS RELATIVE GAS VALVE GROUP OF EXHAUST GAS |
| EP3263882A1 (en) * | 2016-06-27 | 2018-01-03 | Magneti Marelli S.p.A. | Exhaust gas recirculation valve actuator device (egr) in an internal combustion engine and related exhaust gas recirculation valve assembly |
| US10634101B2 (en) | 2016-06-27 | 2020-04-28 | MAGNETI MARELLI S.p.A. | Exhaust gas recirculation valve actuator device (EGR) in an internal combustion engine and related exhaust gas recirculation valve assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170718 Address after: 214063 Jiangsu city of Wuxi province Qian Rong Lu No. 15 Patentee after: China FAW Group Corporation Address before: 214063 Jiangsu city of Wuxi province Qian Rong Lu No. 15 Patentee before: Wuxi Fuel Injection Equipment Institute, China FAW Group Corporation |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110727 |
|
| CX01 | Expiry of patent term |