CN211623567U - EGR valve with magnetic control shape memory alloy as driver - Google Patents
EGR valve with magnetic control shape memory alloy as driver Download PDFInfo
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- CN211623567U CN211623567U CN202020239051.0U CN202020239051U CN211623567U CN 211623567 U CN211623567 U CN 211623567U CN 202020239051 U CN202020239051 U CN 202020239051U CN 211623567 U CN211623567 U CN 211623567U
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Abstract
The utility model discloses a magnetic control shape memory alloy is as EGR valve of driver, including magnetic control shape memory alloy, the iron core that has excitation coil, the uide bushing, the seat circle, the case, the valve body, resetting means and central rod, valve body one end is equipped with an end cover, another end has connect a bowl shape stopper, the iron core that has excitation coil is fixed on the end cover, magnetic control shape memory alloy is located the iron core open-ended air gap department that has excitation coil, the case is awl case structure, another tip of interference fit at central rod, the seat circle is pressed and is riveted on the valve body, and with the case contact, resetting means is for being in valve body and the central rod between the return spring mechanism, still be equipped with the uide bushing between valve body and the valve body. The magnetic control shape memory alloy is adopted as a driver to drive the central rod to control the opening of the valve core, so that the response speed is high, the noise is low, the control precision is high, the flow of waste gas passing through the EGR valve can be accurately controlled, and meanwhile, the structure is simple and the reliability is high.
Description
Technical Field
The utility model belongs to the technical field of engine exhaust gas recirculation control, concretely relates to magnetic control shape memory alloy is as EGR valve of driver.
Background
In an engine exhaust gas recirculation system, the flow rate of exhaust gas is adjusted by controlling the opening degree of an EGR valve, and in order to enable the exhaust gas to be mixed with fresh air sucked in an electronic throttle valve according to a certain proportion and then return to a cylinder body for recirculation, so that the combustion temperature and the combustion speed in the cylinder are reduced, the discharge amount of NOx is further reduced, and the purpose of reducing the discharge is achieved. It can be seen that the opening degree of the EGR valve is directly related to the flow rate of the circulating exhaust gas, which affects the combustion performance and the exhaust emission quality of the engine, and therefore, the accurate control of the opening degree of the EGR valve becomes a key technology therein.
With further strict requirements of national six standards on NOx emission, the EGR valve is used as a key monitoring object and is monitored by the ECU, once the EGR valve fails, the ECU gives an alarm, and limits the speed, so that the using satisfaction of customers is reduced, and higher requirements on the service life and the reliability of the EGR valve are provided. The driving motor in the prior art of the EGR valve is mostly driven by a brush motor, and the limitation of the carbon brush structure of the driving motor cannot meet the service life requirement.
SUMMERY OF THE UTILITY MODEL
The utility model provides a magnetic control shape memory alloy is as EGR valve of driver to solve the problem that proposes among the above-mentioned background art. The technical scheme of the utility model is realized like this:
an EGR valve with magnetic control shape memory alloy as a driver comprises the magnetic control shape memory alloy, an iron core with an excitation coil, a guide sleeve, a seat ring, a valve core, a valve body, a reset device and a central rod, wherein the valve body is also provided with an air inlet, an air outlet, a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are communicated through a water channel arranged in the valve body, an open valve cavity is arranged in the valve body, the magnetic control shape memory alloy, the iron core with the excitation coil, the guide sleeve, the seat ring, the valve core, the reset device and the central rod are all arranged in the valve cavity, one end of the valve body is provided with an end cover, the other end of the valve body is connected with a bowl-shaped plug, the iron core with the excitation coil is fixed on the end cover, the magnetic control shape memory alloy is positioned, the valve core is of a conical valve core structure, the valve core is assembled at the other end of the central rod in an interference fit mode, the seat ring is pressed and riveted on the valve body and is in contact with the valve core, the resetting device is a return spring mechanism located between the valve body and the central rod, and a guide sleeve is further arranged between the central rod and the valve body.
The utility model discloses an among the EGR valve of magnetic control shape memory alloy as driver, well core rod is equipped with the tip of case and is equipped with the bulge, the bulge has set firmly round welding fillet with the junction of case.
In the EGR valve of the present invention, the seat ring is uniformly pressed and riveted on the valve body at 12 points.
The utility model discloses an among the EGR valve of magnetic control shape memory alloy as driver, still be equipped with a drive arrangement connector on the outer terminal surface of end cover.
The utility model discloses an among the EGR valve of magnetic control shape memory alloy as driver, uide bushing fixed connection is in the valve body, and slides and cup joint on well core rod.
The utility model discloses an among the EGR valve of magnetic control shape memory alloy as driver, resetting means overlaps on well core rod to be located one side of uide bushing near-end lid.
The utility model discloses an among the EGR valve of magnetic control shape memory alloy as driver, the gas outlet is located between uide bushing and the seat circle, the air inlet is located between seat circle and the calathiform stopper.
Implement the utility model discloses an EGR valve of this kind of magnetic control shape memory alloy as driver has following beneficial effect:
(1) the magnetic control shape memory alloy is adopted as a driver to drive the central rod to control the opening of the valve core, so that the response speed is high, the noise is low, the control precision is high, the flow of waste gas passing through the EGR valve can be accurately controlled, and meanwhile, the structure is simple and the reliability is high;
(2) the magnetic control shape memory alloy is used as an EGR valve of a driver, and a water channel is communicated inside the EGR valve for temperature control, so that the EGR valve is ensured to have long service life and high reliability;
(3) the uide bushing has sealed and self-cleaning function concurrently, can prevent effectively that the EGR valve jamming from taking place.
Drawings
Fig. 1 is a schematic structural diagram of an EGR valve with a magnetic control shape memory alloy as a driver according to the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1, the EGR valve using a magnetic shape memory alloy as a driver comprises a magnetic shape memory alloy 3, an iron core 4 with a magnet exciting coil, a guide sleeve 6, a seat ring 8, a valve core 9, a valve body 10, a reset device 15 and a central rod 16, wherein the valve body 10 is further provided with an air inlet 17, an air outlet 7, an inlet pipe 2 and an outlet pipe 13, the air outlet 7 is positioned between the guide sleeve 6 and the seat ring 8, the air inlet 17 is positioned between the seat ring 8 and a bowl-shaped plug 11, the inlet pipe 2 and the outlet pipe 13 are communicated through a water channel 14 arranged in the valve body 10, an open valve cavity 5 is arranged in the valve body 10, the magnetic shape memory alloy 3, the iron core 4 with the magnet exciting coil, the guide sleeve 6, the seat ring 8, the valve core 9, the reset device 15 and the central rod 16 are all arranged in the valve cavity 5, one end of the valve body 10 is provided with, the outer end face of the end cover 12 is also provided with a driving device connector 1, the magnetic control shape memory alloy 3 is positioned at an air gap with an opening of the iron core 4 with the excitation coil, one end of the magnetic control shape memory alloy is riveted on the end cover 12, the other end of the magnetic control shape memory alloy is connected with one end part of the central rod 16, when current passes through the excitation coil, a magnetic field is generated, the intensity and the direction of the magnetic field can be adjusted by using the magnitude and the positive and negative poles of the current, due to the magnetostrictive effect, the magnetic control shape memory alloy 3 correspondingly stretches and retracts to push the central rod 16 to move, meanwhile, the valve body is provided with a cooling water path 14 for circulation.
Valve core 9 is the cone valve core structure, has that the pressure of positive flow is little, the reverse is by and let out advantage such as the leakage quantity is little, and interference fit is at another tip of well core rod 16, and well core rod 16 is equipped with the tip of valve core 9 and is equipped with a bulge, and the bulge sets firmly the round welding fillet with the junction of valve core 9.
Seat circle 8 adopts 12 point type evenly to press and rivets on valve body 10, and contact with case 9, keep off case 9 in one side, resetting means 15 is for being in the return spring mechanism between valve body 10 and well core rod 16, resetting means 15 overlaps on well core rod 16, and be located the one side of 6 near-end covers 12 of uide bushing, still be equipped with uide bushing 6 between well core rod 16 and the valve body 10, 6 fixed connection of uide bushing are in valve body 10, and the slip cup joints on well core rod 16, uide bushing 6 has played sealed and self-cleaning action, can clear away the carbon deposit on well core rod 16 through reciprocating motion, play the function of automatically cleaning, the reliability and the life of EGR valve have been improved greatly.
The working principle is as follows: the utility model discloses a EGR valve regards as the power supply with magnetic control shape memory alloy driver, when excitation coil circular telegram, produces perpendicular to magnetic control shape memory alloy 3's magnetic field, and 3 extensions of magnetic control shape memory alloy promote well core rod 16 for the case 9 that links to each other with it opens, and waste gas is flowed into gas outlet 7 by air inlet 17. The water channel 14 is filled with water through the water inlet pipe 2, the water outlet pipe 13 is filled with water, and cooling water circulation avoids sealing failure of the guide sleeve 6 caused by high-temperature waste gas and thermal damage to the excitation coil of the iron core of the driver, so that the EGR valve is ensured to have long service life and high reliability; when the power is cut off, the reset device 15 restores the shape of the magnetic control shape memory alloy 3 to prepare for entering the next working cycle.
The present invention is not limited to the embodiments, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The EGR valve with the magnetic control shape memory alloy as the driver is characterized by comprising the magnetic control shape memory alloy (3), an iron core (4) with a magnet exciting coil, a guide sleeve (6), a seat ring (8), a valve core (9), a valve body (10), a reset device (15) and a central rod (16), wherein the valve body (10) is also provided with an air inlet (17), an air outlet (7), a water inlet pipe (2) and a water outlet pipe (13), the water inlet pipe (2) and the water outlet pipe (13) are communicated through a water channel (14) arranged in the valve body (10), an open valve cavity (5) is arranged in the valve body (10), the magnetic control shape memory alloy (3), the iron core (4) with the magnet exciting coil, the guide sleeve (6), the seat ring (8), the valve core (9), the reset device (15) and the central rod (16) are all arranged in the valve cavity (5), one end of the valve body, another end has connect a calathiform stopper (11), iron core (4) with excitation coil are fixed on end cover (12), magnetic control shape memory alloy (3) are located iron core (4) open-ended air gap department with excitation coil, and one end riveting on end cover (12), and a tip connection of the other end and well core rod (16), case (9) are the awl case structure, and interference fit is at another tip of well core rod (16), seat circle (8) are pressed and are riveted on valve body (10) to with case (9) contact, resetting means (15) are the return spring mechanism who is in between valve body (10) and well core rod (16), still be equipped with uide bushing (6) between well core rod (16) and valve body (10).
2. The magnetically controlled shape memory alloy EGR valve as actuator according to claim 1, wherein the end of the center rod (16) fitted with the valve core (9) is provided with a protrusion, and a circle of welding fillet is fixedly arranged at the connection of the protrusion and the valve core (9).
3. The magnetically controlled shape memory alloy actuated EGR valve according to claim 1 wherein the seat ring (8) is uniformly clinched to the valve body (10) using 12-point clinching.
4. The EGR valve as actuator made of magnetic shape memory alloy as claimed in claim 1, wherein the outer end face of the end cap (12) is further provided with a driving device connector (1).
5. The EGR valve taking the magnetically controlled shape memory alloy as the driver as recited in claim 1, wherein the guide sleeve (6) is fixedly connected in the valve body (10) and is slidably sleeved on the central rod (16).
6. -EGR valve with magnetically controlled shape memory alloy as actuator according to claim 1, characterized in that the return means (15) is housed on the central rod (16) on the side of the guide sleeve (6) near the end cap (12).
7. -EGR valve with magnetically controlled shape memory alloy as actuator according to claim 1 characterized in that the air outlet (7) is located between the guide sleeve (6) and the seat ring (8) and the air inlet (17) is located between the seat ring (8) and the bowl plug (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020239051.0U CN211623567U (en) | 2020-03-02 | 2020-03-02 | EGR valve with magnetic control shape memory alloy as driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020239051.0U CN211623567U (en) | 2020-03-02 | 2020-03-02 | EGR valve with magnetic control shape memory alloy as driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211623567U true CN211623567U (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020239051.0U Active CN211623567U (en) | 2020-03-02 | 2020-03-02 | EGR valve with magnetic control shape memory alloy as driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211623567U (en) |
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2020
- 2020-03-02 CN CN202020239051.0U patent/CN211623567U/en active Active
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