WO2017177882A1 - Integrated device, tail gas post-treatment system, and control method - Google Patents

Abstract

Provided is an integrated device for a pump and a nozzle. The integrated device comprises a pump assembly (18) and a nozzle assembly (19). The pump assembly (18) is provided with an accommodating cavity (322) for accommodating the nozzle assembly (19), and comprises a pump assembly housing (180) and a pump (11). The pump assembly housing (180) comprises an inlet passage (15) and an outlet passage (16). The outlet passage (15) communicates with to the nozzle assembly (19). The pump assembly (18) comprises a motor coil (111) used for driving the pump (11), a magnetic body (72), and a first gear assembly (74) and a second gear assembly (75) that engage with each other. The nozzle assembly (19) comprises a nozzle assembly housing (190) and a nozzle (12). The nozzle assembly (19) also comprises a nozzle coil (121) used for driving the nozzle (12), and the motor coil (111) and the nozzle coil (121) are independently controlled. The pump assembly housing (180) and the nozzle assembly housing (190) are fixed together. The integrated device has a simple and compact structure and has a high control precision. Also provided are a tail gas post-treatment system and a control method.

Description

Integrated device, exhaust gas aftertreatment system and control method

The present application claims the priority of the Chinese patent application filed on April 14, 2016, the application number is 201610230081.3, and the invention is entitled "integrated device, exhaust gas aftertreatment system, and control method", the entire contents of which are incorporated herein by reference. In the application.

Technical field

The invention relates to an integrated device, an exhaust gas aftertreatment system and a control method, and belongs to the technical field of engine exhaust aftertreatment.

Background technique

As the emission standards of internal combustion engine vehicles become more and more strict, in order to reduce harmful substances such as nitrogen oxides in the exhaust gas, the post-treatment technology commonly used in the industry is selective catalytic reduction (SCR), and the exhaust gas is installed upstream of the SCR. The urea solution is sprayed in. The urea solution is hydrolyzed and pyrolyzed to generate ammonia gas, and chemically reacts with nitrogen oxides to reduce the concentration of harmful substances.

Urea injection systems currently on the market typically include air assist systems and non-air assist systems. Of course, any system includes a urea tank assembly, a pump supply unit connected to the urea tank assembly through a low pressure line, a nozzle module connected to the pump supply unit through a high pressure line, and a controller. The pump supply unit includes a urea pump, a pressure sensor, and the like, and the nozzle module includes a urea nozzle or the like. The urea pump is spaced farther from the urea nozzle and is connected by a urea tube. In addition, the existing urea injection system contains many components, and the installation is complicated and the cost is high.

Therefore, there is an urgent need to provide a new type of technical solution.

Summary of the invention

It is an object of the present invention to provide an integrated device, an exhaust aftertreatment system, and a control method that are relatively precise in control.

To achieve the above object, the present invention adopts the following technical solutions:

An integrated pump and nozzle device, wherein the pump is for pumping a fluid medium to the nozzle, the nozzle for injecting the fluid medium into an exhaust of an engine, the integrated device comprising a pump assembly and a nozzle assembly Wherein the pump assembly is provided with a receiving cavity at least partially receiving the nozzle assembly; the pump assembly includes a pump assembly housing and the pump cooperating with the pump assembly housing, the pump assembly housing including An inlet passage upstream of the pump and in communication with the pump and an outlet passage downstream of the pump and in communication with the pump, the outlet passage being in communication with the nozzle assembly; the pump assembly including Drive the said a motor coil of the pump, a magnetic body interacting with the motor coil, and a first gear assembly and a second gear assembly that mesh with each other, wherein the first gear assembly includes a first gear shaft and a first gear, the second The gear assembly includes a second gear shaft and a second gear, the first gear meshing with the second gear; the nozzle assembly including a nozzle assembly housing and the nozzle mating with the nozzle assembly housing, The nozzle assembly further includes a nozzle coil for driving the nozzle, wherein the motor coil and the nozzle coil are independently controlled, and the pump assembly housing is fixed to the nozzle assembly housing.

As a further improved technical solution of the present invention, the pump is a urea pump, the nozzle is a urea nozzle, and the fluid medium is a urea solution.

As a further improved technical solution of the present invention, the pump is a fuel pump, the nozzle is a fuel nozzle, and the fluid medium is a fuel.

As a further improved technical solution of the present invention, the integrated device includes a controller connected to the motor coil and the nozzle coil, and the controller independently controls the urea pump and the urea nozzle, respectively.

As a further improved technical solution of the present invention, the integrated device includes a pressure sensor in communication with the outlet passage and an overflow element connected between the outlet passage and the inlet passage.

As a further improved technical solution of the present invention, the integrated device includes a temperature sensor installed in the housing.

As a further improved technical solution of the present invention, the pump assembly includes a metal cover for housing the magnetic body, the motor coil is sleeved on a periphery of the metal cover; the first gear shaft is a drive shaft, and the first The two gear shafts are driven shafts, and the first gear shaft is higher than the second gear shaft.

As a further improved technical solution of the present invention, the pump assembly further includes an elastic body housed in the metal cover and located under the magnetic body, the elastic body being capable of being compressed to absorb the expansion caused by urea freezing. volume.

As a further improved technical solution of the present invention, the pump assembly housing is provided with a gear slot for receiving the first gear and the second gear, and the first gear is externally meshed with the second gear, the gear One side of the groove is provided with a liquid inlet chamber communicating with the inlet passage, and the other side of the gear groove is provided with an outlet chamber communicating with the outlet passage.

As a further improved technical solution of the present invention, the nozzle assembly includes a magnetic portion that interacts with the nozzle coil, a valve needle portion located below the magnetic portion, and acts between the magnetic portion and the valve needle portion a spring and a valve seat that cooperates with the valve needle portion.

As a further improved technical solution of the present invention, the nozzle coil is located at a periphery of the magnetic portion, and the valve needle portion is provided with a valve a needle, the valve seat being provided with an injection hole that cooperates with the valve needle.

As a further improved technical solution of the present invention, the valve seat includes a swirling fin welded on the nozzle assembly housing, the injection hole is disposed on the swirling sheet, and the swirling fin is further provided with The swirl holes are connected by the injection holes.

As a further improved technical solution of the present invention, the integrated device is provided with a cooling assembly for cooling the urea nozzle, and the cooling assembly cools the urea nozzle by a cooling medium.

As a further improved technical solution of the present invention, the pump assembly housing is provided with a cover at the top, the cover is provided with a cover cavity; and the controller is provided with a control panel located in the cover cavity The motor coil and the nozzle coil are electrically connected to the control board.

As a further improved technical solution of the present invention, the cover is provided with a through hole communicating with the cavity of the cover and a waterproof and permeable cover fixed in the through hole; the control board is soldered with a cable plug, The cable plug is exposed outside the casing.

As a further improved technical solution of the present invention, the pump assembly housing is provided with a first housing and a connecting plate assembly clamped between the cover and the first housing, the connecting plate assembly including a plate a sheet portion and a metal cover fixed on the sheet portion and protruding upward, the magnetic body being housed in the metal cover, the motor coil being sleeved on a periphery of the metal cover; the plate portion Providing a plurality of mounting cylinders fixed thereto, the mounting cylinders being provided with internally threaded holes, the control panel being provided with a plurality of openings corresponding to the mounting cylinders, a plurality of screws being tightened after passing through the openings The control plate is fixed in the internally threaded hole.

As a further improvement of the technical solution of the present invention, the motor coil is provided with a bracket and a coil wound on the bracket, and the bracket is provided with a hole for receiving the metal cover and a plurality of mounting posts extending downward.

As a further improved technical solution of the present invention, the first housing is provided with a liquid inlet passage connected to the urea joint, the first housing including a first upper surface, a first lower surface and a first side, wherein The first upper surface is provided with a first annular groove, a first island portion surrounded by the first annular groove, and a first sealing ring received in the first annular groove, the first sealing ring being located at the metal Below the cover, the plate portion presses down the first sealing ring; the first island portion is provided with a first positioning hole penetrating through the first upper surface and the first lower surface, and a penetrating portion a second positioning hole of the first lower surface, the urea pump includes a first sleeve received in the first positioning hole and a second sleeve received in the second positioning hole, wherein the first A gear shaft is inserted into the first bushing, and the second gear shaft is inserted into the second bushing.

As a further improvement of the present invention, the first lower surface is provided with a first relief groove that communicates with the first positioning hole and the second positioning hole.

As a further improvement of the technical solution of the present invention, the first island portion further includes a first upper surface and the second a first flow guiding groove communicating with the bit hole, an exit hole penetrating the first upper surface and the first lower surface, and a first connecting hole penetrating the first upper surface and communicating with the receiving cavity The outlet aperture is in communication with the outlet passage.

As a further improvement of the present invention, the first upper surface is further provided with a pressure sensor receiving hole located at a side of the first island portion for receiving a pressure sensor; the receiving cavity extends downward through the first In a lower surface, the receiving cavity communicates with the pressure sensor receiving hole.

As a further improved technical solution of the present invention, the first housing is provided with a third connecting hole penetrating the first lower surface and communicating with the liquid inlet passage; the first housing is further provided with the An overflow element receiving groove communicating with the second connecting hole, the overflow element receiving groove extending outwardly through the first side; the integrated device is disposed in the overflow element receiving groove An overflow element; when the pressure of the outlet passage is above a set value, the overflow element opens to return a portion of the urea solution to the inlet passage.

As a further improved technical solution of the present invention, the pump assembly housing includes a second housing below the first housing and connected to the first housing, and the second housing includes a second upper a surface, a second lower surface, and a gear groove extending through the second upper surface and the second lower surface for receiving the first gear and the second gear, one side of the gear groove is provided with the third An inlet chamber communicating with the connection hole, and the other side of the gear groove is provided with an outlet chamber communicating with the outlet port.

As a further improved technical solution of the present invention, the pump assembly housing includes a third housing below the second housing and connected to the second housing, the third housing including a body portion and a boss extending downward from the body portion, wherein the body portion is provided with a third upper surface, the third upper surface is provided with a third annular groove and a third island surrounded by the third annular groove The third island portion is provided with a third positioning hole and a fourth positioning hole penetrating the third upper surface, and the third positioning hole and the fourth positioning hole extend into the convex portion; The urea pump includes a third sleeve housed in the third positioning hole and a fourth sleeve received in the fourth positioning hole, wherein the first gear shaft is inserted into the third sleeve The second gear shaft is inserted into the fourth bushing.

As a further improvement of the present invention, the third island portion is provided with a second unloading groove that communicates with the third positioning hole and the fourth positioning hole; the third island portion is further provided at the a second guiding groove and a third guiding groove of the third upper surface, wherein the second guiding groove is in communication with the third positioning hole, and the third guiding groove is in communication with the fourth positioning hole.

As a further improvement of the present invention, the nozzle assembly housing includes a main body portion and an extending portion extending downward from the main body portion, the main body portion is provided with a receiving cavity for receiving the urea nozzle, and the convex portion is received a recess of the starting portion, the receiving cavity extending downwardly into the extension.

As a further improved technical solution of the present invention, the pump assembly housing and the nozzle assembly housing are fixed together from bottom to top by bolts.

As a further improved technical solution of the present invention, the nozzle assembly includes a magnetic portion that interacts with the nozzle coil, a valve needle portion that is coupled to the magnetic portion, and a spring that acts on the valve needle portion; the extension portion And a collecting chamber communicating with the receiving cavity, wherein the magnetic portion is at least partially received in the receiving cavity, and a portion of the magnetic portion protruding from the second upper surface is received in the receiving cavity.

As a further improvement of the present invention, the spring is installed in the magnetic portion and the valve needle portion, and the valve needle portion is provided with a tapered portion and a valve needle extending downward from the tapered portion. a valve needle extending into the manifold, the magnetic portion being provided with a first communication hole communicating with the accommodation chamber, the valve needle portion being provided with a second communication hole communicating with the first communication hole The tapered portion is provided with a third communication hole that communicates the second communication hole with the manifold.

As a further improved technical solution of the present invention, the nozzle assembly includes a valve seat matched with the valve needle, the valve seat includes a swirling piece welded on the extending portion, and the swirling sheet is provided with An injection hole that cooperates with the valve needle and a plurality of swirl grooves that communicate with the injection hole, the swirl groove is in communication with the manifold.

As a further improved technical solution of the present invention, the nozzle assembly housing is provided with a first cooling passage, a second cooling passage spaced apart from the first cooling passage, and an end cover sealed at a periphery of the extension portion, The nozzle assembly housing forms an annular cooling groove connecting the first cooling passage and the second cooling passage between the end cover and the extending portion, and the first cooling passage is connected with the inlet joint for supplying An engine coolant injection is provided, the second cooling passage being coupled to the outlet joint for engine coolant to flow out.

The invention also discloses the following technical solutions:

An exhaust aftertreatment system includes an exhaust aftertreatment exhaust system and an exhaust aftertreatment packaging system, wherein the injection system includes the aforementioned integrated device, the package system including a carrier downstream of the integrated device.

As a further improved technical solution of the present invention, the carrier comprises selective catalytic reduction, and the packaging system further comprises at least one mixer between the integrated device and the carrier.

The invention also discloses the following technical solutions:

A control method of an integrated device, the integrated device being the aforementioned integrated device, the control method comprising:

Driving the pump to operate, drawing the fluid medium into the pump through the inlet passage;

After the pump is pressurized, the fluid medium is delivered to the nozzle through the outlet passage;

When the injection condition is reached, energizing the nozzle coil, at least partially opening the nozzle to inject the fluid medium into the exhaust of the engine; wherein:

The motor coil and the nozzle coil are independently controlled.

Compared with the prior art, the integrated device of the pump and the nozzle of the invention integrates the pump and the nozzle well, and has a simple and compact structure, which greatly facilitates the installation of the customer. In addition, by independently controlling the motor coil and the nozzle coil, mutual interference between the pump and the nozzle is avoided, and the accuracy of the control is improved. On the basis of the integration of the urea pump and the urea nozzle in the integrated device, due to the improvement of the control precision, the amount of urea injected into the exhaust gas can be appropriately proportioned with the nitrogen oxides, thereby reducing the excessive injection of urea. Risk of crystallization.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram of the exhaust gas aftertreatment system of the present invention applied to the treatment of engine exhaust.

Figure 2 is a schematic diagram of the integrated device of Figure 1.

3 is a perspective view of an integrated device of the present invention in an embodiment.

Figure 4 is a perspective view of another angle of Figure 3.

Figure 5 is a perspective view of another angle of Figure 3.

Figure 6 is a left side view of Figure 3.

Figure 7 is a front elevational view of Figure 3.

Fig. 8 is a bottom view of Fig. 5;

Figure 9 is a plan view of Figure 5.

Figure 10 is a partial perspective exploded view of the integrated device of the present invention with the pump assembly separated from the nozzle assembly.

Figure 11 is a partial exploded perspective view of the pump assembly of Figure 10 with the housing separated.

Figure 12 is a perspective view of the casing of Figure 11.

Figure 13 is a partially exploded perspective view of the casing of Figure 11 with the motor coils separated.

Figure 14 is a perspective view of the motor coil of Figure 13.

Figure 15 is a further exploded perspective view of Figure 13 with the control panel separated.

Figure 16 is an exploded perspective view showing the control panel and the motor coil of Figure 15 removed, wherein the connector assembly is separated.

Figure 17 is a perspective view of the connecting plate assembly of Figure 16.

Figure 18 is a partially exploded perspective view of the connecting plate assembly of Figure 16;

Figure 19 is a further exploded perspective view of Figure 16 in which the magnetic body and the elastomer are separated.

Figure 20 is a further exploded perspective view of Figure 19 with the first seal ring, temperature sensor and pressure sensor separated.

Fig. 21 is a partially exploded perspective view showing the first seal ring, the temperature sensor, the pressure sensor, and the like in Fig. 20, wherein the first casing is separated.

Figure 22 is an exploded perspective view of the first housing of Figure 21;

Figure 23 is an exploded perspective view of Figure 22 at another angle.

Figure 24 is a perspective view of a portion of the first housing of Figure 22.

Figure 25 is a perspective view of Figure 24 at another angle.

Figure 26 is a plan view of Figure 25.

Figure 27 is a plan view of Figure 24 .

Figure 28 is a cross-sectional view taken along line D-D of Figure 27 .

Figure 29 is a cross-sectional view taken along line E-E of Figure 27.

Figure 30 is a cross-sectional view taken along line F-F of Figure 27 .

Figure 31 is a schematic cross-sectional view taken along line G-G of Figure 27.

Figure 32 is a perspective view of the first housing of Figure 21 removed.

Figure 33 is a partial exploded perspective view of Figure 32 with the first gear assembly and the second gear assembly separated.

Figure 34 is a plan view of Figure 32.

Figure 35 is an exploded perspective view showing the first gear assembly and the second gear assembly of Figure 33 removed.

Figure 36 is a perspective view of the second housing of Figure 35.

Figure 37 is a perspective view of another angle of Figure 36.

38 is a plan view of FIG. 36.

Figure 39 is a cross-sectional view taken along line H-H of Figure 38.

Figure 40 is a perspective view of the third housing assembly of Figure 35.

41 is a plan view of FIG. 40.

Figure 42 is a cross-sectional view taken along line I-I of Figure 41.

Figure 43 is a cross-sectional view taken along line J-J of Figure 41.

Figure 44 is a partially exploded perspective view of the nozzle assembly of the present invention.

Figure 45 is a partially exploded perspective view of the urea nozzle of Figure 44.

Figure 46 is a perspective view of the third housing of Figure 45.

Figure 47 is a partially exploded perspective view of Figure 46.

Figure 48 is an exploded perspective view of another angle of Figure 47.

Figure 49 is a perspective view showing the inlet joint and the outlet joint of Figure 46 removed.

Figure 50 is a perspective view of another angle of Figure 49.

Figure 51 is a plan view of Figure 50.

Figure 52 is a plan view of Figure 49.

Figure 53 is a cross-sectional view taken along line K-K of Figure 52.

Figure 54 is a schematic cross-sectional view taken along line L-L of Figure 53.

Figure 55 is a schematic cross-sectional view taken along line M-M of Figure 53.

Figure 56 is an exploded perspective view of the integrated device of the present invention.

Figure 57 is a cross-sectional view taken along line A-A of Figure 9.

Figure 58 is a cross-sectional view taken along line B-B of Figure 9.

Figure 59 is a cross-sectional view taken along line C-C of Figure 9.

Figure 60 is a cross-sectional view taken along line N-N of Figure 57.

Figure 61 is a cross-sectional view taken along line O-O of Figure 57.

Figure 62 is a cross-sectional view taken along line P-P of Figure 57.

Figure 63 is a schematic cross-sectional view taken along line Q-Q of Figure 57.

Figure 64 is a schematic cross-sectional view taken along line R-R of Figure 63.

detailed description

Referring to FIG. 1, the present invention discloses an exhaust aftertreatment system 100 that can be applied to treat exhaust gas from engine 10 to reduce emissions of hazardous materials to meet emission regulations. The exhaust aftertreatment system 100 includes an exhaust aftertreatment injection system 200 and an exhaust aftertreatment packaging system 300, wherein the injection system 200 includes means for pumping urea solution from the urea tank 201 (as indicated by arrow X) and Exhaust to the engine 10 (eg, into the exhaust pipe 106 or within the packaging system 300) An integrated device 1 for injecting a urea solution; the packaging system 300 includes a mixer 301 downstream of the integrated device 1 and a carrier 302 located downstream of the mixer 301. Of course, in some embodiments, the mixer may not be provided, or two or more mixers may be provided. The carrier 302 can be, for example, a selective catalytic reduction (SCR) or the like.

The engine 10 has an engine coolant circulation circuit. Referring to FIG. 1, in the illustrated embodiment of the present invention, the engine coolant circulation circuit includes a first circulation circuit 101 (shown by a thick arrow Y) and a second circulation circuit 102 (refer to a thin arrow Z). The first circulation loop 101 is configured to cool the integrated device 1 to reduce its risk of being burned out by a high temperature engine exhaust; the second circulation loop 102 is used to heat the urea tank 201, To achieve the heating and defrosting function. It can be understood that, in the first circulation loop 101, the integrated device 1 is provided with an inlet joint 103 for the engine coolant to flow in and an outlet joint 104 for the engine coolant to flow out; in the second circulation loop 102, it is provided There is a control valve 105 to open or close the control valve 105 under suitable conditions to effect control of the second circulation loop 102. The urea tank 201 is provided with a heating rod 202 connected to the second circulation loop 102 to heat and thaw the urea solution by using the temperature of the engine coolant.

The integrated device 1 of the present invention will be described in detail below.

Referring to FIG. 2, in principle, the integrated device 1 of the present invention integrates the functions of the urea pump 11 and the urea nozzle 12. The urea pump 11 includes, but is not limited to, a gear pump, a diaphragm pump, a plunger pump, a vane pump, and the like. It should be understood that the term "integrated" as used herein means that the urea pump 11 and the urea nozzle 12 can be mounted as a single unit on the exhaust pipe; or the urea pump 11 and the urea nozzle 12 are close to each other and pass through a shorter one. The connecting pipe is connected and can be regarded as a device as a whole.

Further, in order to independently control the urea pump 11 and the urea nozzle 12, the exhaust gas post-treatment system 100 of the present invention is further provided with a controller 13. It will be appreciated that the controller 13 may be integrated with or separate from the integrated device 1. Referring to FIG. 2, in the illustrated embodiment of the present invention, the controller 13 is integrated in the integrated device 1 to achieve high integration of parts and improve installation convenience of the client.

The integrated device 1 is provided with a housing 14 for accommodating the urea pump 11 and the urea nozzle 12. The embodiment shown in Figure 2 is only a rough representation of the housing 14. For example, in one embodiment, the housing 14 is shared by the urea pump 11 and the urea nozzle 12; in another embodiment, the housing 14 is divided into a first housing that mates with the urea pump 11. And a second housing that cooperates with the urea nozzle 12, the first housing and the second housing being assembled together to form a unitary body. The housing 14 is provided with an inlet passage 15 connected between the urea tank 201 and the urea pump 11, and an outlet passage 16 connected between the urea pump 11 and the urea nozzle 12. It should be noted that the term "inlet channel 15" used herein is "into" The "outlet" in the "mouth" and "outlet passage 16" is referenced by the urea pump 11, that is, the upstream of the urea pump 11 is the inlet, and the downstream of the urea pump 11 is the outlet. The outlet passage 16 is in communication with the urea nozzle 12. To pump the urea solution to the urea nozzle 12. It is understood that the inlet passage 15 is located upstream of the urea pump 11 as a low pressure passage; the outlet passage 16 is located downstream of the urea pump 11, which is a high pressure passage.

In addition, the integrated device 1 is provided with a temperature sensor 171 for detecting temperature. The temperature sensor 171 may be disposed to communicate with the inlet passage 15 and/or the outlet passage 16; or the temperature sensor 171 may be disposed to be mounted at any position of the integrated device 1. The signal detected by the temperature sensor 171 is transmitted to the controller 13, and the control algorithm designed by the controller 13 based on the input signal and other signals can improve the injection accuracy of the urea nozzle 12. The integrated device 1 is also provided with a pressure sensor 172 for detecting pressure, the pressure sensor 172 being in communication with the outlet passage 16 to detect the pressure in the high pressure passage of the outlet of the urea pump 11. Due to the integrated design of the present invention, the distance of the internal passage is relatively short, so that the position of the pressure sensor 172 can be considered to be relatively close to the urea nozzle 12. An advantage of this design is that the pressure measured by the pressure sensor 172 is relatively close to the pressure in the urea nozzle 12, improving the accuracy of the data, thereby increasing the injection accuracy of the urea nozzle 12.

Referring to FIG. 2, the integrated device 1 is further provided with an overflow element 173 connected between the outlet passage 16 and the inlet passage 15. The overflow element 173 includes, but is not limited to, a relief valve, a safety valve, or an electrically controlled valve or the like. The function of the overflow element 173 is to open the overflow element 173 when the pressure in the high pressure passage is higher than the set value, return at least a part of the urea solution located in the high pressure passage to the low pressure passage or directly return to The urea tank 201 is used to achieve pressure regulation.

In order to drive the urea pump 11, the urea pump 11 is provided with a motor coil 111 that communicates with the controller 13. In order to drive the urea nozzle 12, the urea nozzle 12 is provided with a nozzle coil 121 that communicates with the controller 13.

The controller 13 communicates with the temperature sensor 171 and the pressure sensor 172 to transmit a temperature signal and a pressure signal to the controller 13. Of course, in order to enable precise control, the controller 13 can also receive other signals, such as signals from the CAN bus that are related to engine operating parameters. In addition, the controller 13 can also obtain the rotational speed of the urea pump 11. Of course, the acquisition of the rotational speed signal can be achieved by a corresponding rotational speed sensor 175 (hardware) or by a control algorithm (software). The controller 13 independently controls the urea pump 11 and the urea nozzle 12. The advantage of such control is that the effect of the action of the urea pump 11 on the urea nozzle 12 can be reduced to achieve a relatively high control accuracy.

In addition, under certain operating conditions, since the exhaust of the engine has a higher temperature, the urea nozzle 12 is installed in the exhaust. On the tube, it is therefore necessary to cool the urea nozzle 12. The integrated device 1 is also provided with a cooling assembly for this purpose, which cools the urea nozzle 12 by means of a cooling medium. The cooling medium includes, but is not limited to, air, and/or engine coolant, and/or lubricating oil, and/or urea, and the like. Referring to Figure 2, the illustrated embodiment of the present invention uses water cooling, i.e., cooling the urea nozzle 12 with engine coolant. A cooling passage 141 for circulating the engine coolant is provided in the housing 14.

Referring to FIG. 2, the main working principle of the integrated device 1 is as follows:

The controller 13 drives the urea pump 11 to operate. The urea solution in the urea tank 201 is sucked into the urea pump 11 through the inlet passage 15, and after being pressurized, is sent to the urea nozzle 12 through the outlet passage 16. Among them, the controller 13 collects and/or calculates required signals such as temperature, pressure, pump speed, and the like. When the injection condition is reached, the controller 13 sends a control signal to the urea nozzle 12, such as energizing the nozzle coil 121, and by controlling the movement of the valve needle to effect urea injection. The controller 13 sends a control signal to the urea pump 11 to control its rotational speed, thereby stabilizing the pressure of the system. In the illustrated embodiment of the invention, the controller 13 independently controls the urea pump 11 and the urea nozzle 12.

Referring to FIGS. 3 through 64, in the illustrated embodiment of the present invention, the integrated device 1 includes a pump assembly 18, a nozzle assembly 19, and a controller 13. The nozzle assembly 19 is partially inserted into the pump assembly 18 and assembled together by a plurality of fixing bolts 64.

Referring to Figures 3 through 12, in the illustrated embodiment of the invention, the pump assembly 18 includes a pump assembly housing 180 and a urea pump 11 that mates with the pump assembly housing 180. The pump assembly housing 180 includes a housing 2 at the top and a first housing 3, a second housing 4, and a third housing 5 that are stacked below the housing 2. In the illustrated embodiment of the invention, the first housing 3, the second housing 4, and the third housing 5 are each made of a metal material.

Referring to FIG. 11 and FIG. 12, the casing 2 includes a casing cavity 21 for covering the controller 13 and at least a portion of the pump assembly 18, and a through hole 22 communicating with the casing cavity 21. A plurality of first mounting holes 23 at the periphery and a waterproof venting cover 24 fixed in the through holes 22. Referring to FIG. 15, the controller 13 is usually mounted with a chip 136 and other electronic components 137, which generate heat during operation, causing air around it to expand. The present invention is well provided by providing a waterproof and permeable cover 24. It solves the problem of crushing chips and/or electronic components due to air expansion, and also functions as a waterproof. In addition, the waterproof venting cover 24 can improve the environment in which the controller 13 is placed to enable it to meet operating conditions.

Referring to FIG. 13 and FIG. 15, the controller 13 includes a control board 131 and a cable plug 132 soldered to the control board 131. The cable plug 132 passes through the casing 2 to be exposed to the outside for connection to an external circuit. Control The panel 131 is provided with a plurality of openings 134 for the screws 133 to pass through to secure the control panel 131. Further, in the illustrated embodiment of the present invention, the control panel 131 is annular and is provided with a central hole 135 at the center.

In the illustrated embodiment of the present invention, in order to improve the heat dissipation performance of the control board 131, the cover 2 is made of a metal material having a better heat dissipation effect. In addition, the cover 2 may also be provided with a plurality of fins (not shown) on the outside to enhance the heat dissipation effect.

Referring to FIG. 3 to FIG. 7 , FIG. 10 and FIG. 15 to FIG. 20 , the pump assembly housing 180 is further provided with a connecting plate sandwiched between the cover 2 and the first housing 3 . Component 6. The function of the connecting plate assembly 6 includes at least fixing the control board 131. Specifically, the connecting plate assembly 6 is provided with a plate portion 61 and a metal cover 62 fixed to the plate portion 61 and convex upward. The metal cover 62 passes upward through the center hole 135 of the control board 131. The upper surface of the plate portion 61 is provided with a plurality of mounting cylinders 611 fixed thereto, and the mounting cylinders 611 are provided with internally threaded holes. The screw 133 is screwed into the internally threaded hole after passing through the opening 134 of the control board 131 to fix the control board 131. Referring to FIG. 13 , the control board 131 is mounted on the board portion 61 and forms a gap with the board portion 61 to facilitate better heat dissipation and installation convenience of the control board 131 . .

Referring to FIG. 16, the plate portion 61 is further provided with a second mounting hole 612 corresponding to the first mounting hole 23. The plate portion 61 is further provided with a through hole 614, a first threading hole 618 and a second threading hole 615 extending through the upper and lower surfaces thereof. Referring to Figures 16, 19 and 20, the pressure sensor 172 is at least partially received in the through hole 614. The conductive line 1721 of the pressure sensor 172 passes through the through hole 614, the conductive line 124 of the nozzle assembly 19 passes through the first threading hole 618, the conductive line 1711 of the temperature sensor 171 passes through the second threading hole 615, and is electrically connected to the On the control board 131. Furthermore, in order to achieve better positioning, the pump assembly 18 is also provided with a number of first positioning pins 616 that are clamped between the plate portion 61 and the first housing 3. Referring to FIG. 18, the plate portion 61 is provided with a through hole 617 corresponding to the metal cover 62. In the illustrated embodiment of the invention, the lower end of the metal cover 62 is welded to the inner wall of the through hole 617; the mounting barrel 611 is welded to the plate portion 61.

Referring to FIG. 13 to FIG. 15 and FIG. 32, in the illustrated embodiment of the present invention, the urea pump 11 is a gear pump including a motor coil 111, the metal cover 62, and the metal cover. The elastomer 71 and the magnetic body 72 in the 62, the first sealing ring 73 located below the metal cover 62, and the first gear assembly 74 and the second gear assembly 75 that are in mesh with each other. Since the gear pump can establish a relatively large working pressure, it is advantageous to increase the atomization effect of the urea nozzle 12. In addition, the gear pump can also reverse, which helps to evacuate the residual urea solution and reduce the risk of urea crystallization. The motor coil 111 is provided with a bracket 112 and a coil 113 wound around the bracket 112. The bracket 112 is provided with a hole 114 for receiving the metal cover 62 and extending downward. A number of mounting posts 115. The mounting post 115 is provided with a third mounting hole 116 corresponding to the first mounting hole 23 and the second mounting hole 612.

Referring to FIG. 14, FIG. 19, FIG. 20 and FIG. 57, the motor coil 111 is sleeved on the outer periphery of the metal cover 62, and the plate portion 61 presses the first sealing ring 73 to achieve sealing. . In the illustrated embodiment of the present invention, the elastic body 71 is located at the lower end of the magnetic body 72, and the elastic body 71 and the magnetic body 72 are supported by a metal skeleton 720, for example, the magnetic body 72 and the elastic body 71 are respectively sleeved on the metal skeleton. The upper and lower ends of the 720. The metal skeleton 720 is provided with a partitioning plate 721 between the elastic body 71 and the magnetic body 72. In addition to the partitioning plate 721, the metal skeleton 720 has a hollow cylindrical shape as a whole, and the first gear assembly 74 is at least partially housed in the metal skeleton 720. The elastic body 71 is provided with a radially extending fitting hole 711. The upper end of the first gear assembly 74 is radially fixed to the metal frame 720 by a screw 722 installed in the fitting hole 711. The axial movement of the gear assembly 74 improves the smoothness of the gear pump operation. It is well known that the volume of urea solution expands after icing. By providing the elastomer 71, the elastomer 71 can be compressed to absorb the expanded volume, thereby avoiding damage to other components due to volume expansion.

Referring to FIG. 20 to FIG. 43 , in the illustrated embodiment of the present invention, the first housing 3 , the second housing 4 , and the third housing 5 are machined parts, and are driven by bolts 66 . And the top is fixed together. The first housing 3 includes a first upper surface 31, a first lower surface 32, and a first side surface 33, wherein the first upper surface 31 is provided with a first annular groove 311 and surrounded by the first annular groove 311 The first island portion 312. The first annular groove 311 is configured to receive the first sealing ring 73. The first lower surface 32 is provided with a second annular groove 325 and a second island portion 326 surrounded by the second annular groove 325. The second annular groove 325 is for receiving the second sealing ring 731.

Referring to FIG. 21 to FIG. 31 , the first island portion 312 is provided with a first positioning hole 3121 extending through the first upper surface 31 and the first lower surface 32 , and penetrates the first lower surface 32 . a second positioning hole 3122, a first guiding groove 3123 penetrating the first upper surface 31 and communicating with the second positioning hole 3122, a first guiding surface 3123 extending through the first upper surface 31 and adjacent to the first guiding groove 3123 An exit hole 3126, a first connection hole 3124 penetrating the first upper surface 31 and opposite to the first guide groove 3123, and a second connection extending through the first upper surface 31 and adjacent to the first connection hole 3124 Hole 3125. In addition, as shown in FIG. 29, the first casing 3 is provided with a liquid inlet passage 332 that penetrates the first side surface 33 to be connected to the urea joint 331. The first housing 3 is provided with a third connecting hole 3127 that penetrates the first lower surface 32 and communicates with the liquid inlet passage 332. The third connection hole 3127 is perpendicular to the liquid inlet passage 332. The first positioning hole 3121, the second positioning hole 3122, the third connection hole 3127, and the outlet hole 3126 each penetrate the second island portion 326.

Referring to FIG. 22 and FIG. 23, the urea pump 11 is provided with a first sleeve 76 received in the first positioning hole 3121 and a second sleeve 77 received in the second positioning hole 3122. . The first upper surface 31 further includes a pressure sensor receiving hole 313 located at a side of the first island portion 312 for receiving the pressure sensor 172, and a side of the pressure sensor receiving hole 313 for receiving the temperature sensor. The temperature sensor of the 171 accommodates the hole 314. Referring to FIG. 20, a seal ring 1722 is mounted on the pressure sensor 172 to seal against the inner wall of the pressure sensor receiving hole 313. The pressure sensor 172 is pressed by the sheet portion 61 to achieve fixation. In addition, the first housing 3 is further provided with an outwardly protruding mounting flange 315, and the mounting flange 315 is provided corresponding to the first mounting hole 23, the second mounting hole 612 and the third mounting hole. A fourth mounting aperture 316 of 116.

When assembled, the bolts 63 are sequentially passed through the fourth mounting hole 316, the second mounting hole 612, and the third mounting hole 116, and are fastened in the internal threads of the first mounting hole 23. With this arrangement, the first casing 3, the plate portion 61, the motor coil 111, the casing 2, and the like can be fixed.

Referring to FIG. 25 and FIG. 26, the first lower surface 32 is provided with a first relief groove 321 that communicates with the first positioning hole 3121 and the second positioning hole 3122 to ensure pressure balance. The first relief groove 321 is located on the second island portion 326. In addition, the first housing 3 is further provided with a receiving cavity 322 extending downwardly through the first lower surface 32 for at least partially receiving the nozzle assembly 19. Referring to FIG. 28, the receiving cavity 322 is in communication with the pressure sensor receiving hole 313. At the same time, the receiving cavity 322 is also in communication with the first connecting hole 3124. Referring to FIG. 28, in the illustrated embodiment of the present invention, the first connection hole 3124 is inclined inside the first housing 3.

In addition, referring to FIG. 22, FIG. 30, and FIG. 59, the first casing 3 is further provided with an overflow element receiving groove 319 that communicates with the liquid inlet passage 332 and the second connecting hole 3125. The overflow element receiving groove 319 extends outward through the first side surface 33 to receive the overflow element 173. The overflow element 173 is a safety valve in the illustrated embodiment of the invention, the purpose of which is to ensure that the pressure in the high pressure passage in the integrated device 1 is within a safe range by means of pressure relief. In order to fix the overflow element 173, the first housing 3 is provided with a plug 5122 that fixes the overflow element 173.

Referring to FIG. 1, the urea joint 331 is in communication with the urea tank 201 through a urea connection pipe 333. In order to better achieve the heating and defrosting function, the exhaust gas aftertreatment system 100 may further be provided with a heating device 334 that heats the urea connection pipe 333. Referring to FIGS. 22 and 29, in the illustrated embodiment of the present invention, the liquid inlet passage 332 extends horizontally into the interior of the first casing 3. Of course, in other embodiments, the liquid inlet channel 332 can also be at an angle.

Referring to FIGS. 32 to 34, the first gear assembly 74 includes a first gear shaft 741 and is fixed to the first gear shaft. a first gear 742 on the 741; the second gear assembly 75 includes a second gear shaft 751 and a second gear 752 fixed to the second gear shaft 751, the first gear 742 and the second gear 752 Engage. Referring to FIG. 34, in the illustrated embodiment of the present invention, the first gear 742 is externally meshed with the second gear 752. In addition, the first gear shaft 741 is a drive shaft, the second gear shaft 751 is a driven shaft, and the first gear shaft 741 is higher than the second gear shaft 751. The upper end of the first gear shaft 741 passes through the first sleeve 76 and is at least partially positioned in the metal frame 720. The upper end of the second gear shaft 751 is positioned in the second boss 77. When the motor coil 111 is energized, it interacts with the magnetic body 72, and the electromagnetic force drives the first gear shaft 741 to rotate, thereby driving the first gear 742 and the second gear 752 to rotate.

The second housing 4 is located below the first housing 3 and is connected to the first housing 3 . In addition, a plurality of second positioning pins 318 are further disposed between the first housing 3 and the second housing 4 for better positioning. Referring to FIGS. 32 to 39, the second housing 4 includes a second upper surface 41, a second lower surface 42 and a second upper surface 41 and a second lower surface 42 for receiving the The first gear 742 and the gear groove 43 of the second gear 752. One side of the gear groove 43 is provided with an inlet chamber 431 communicating with the inlet passage 15, and the other side of the gear groove 43 is provided with an outlet chamber 432 communicating with the outlet passage 16. Specifically, the inlet chamber 431 is in communication with the third connection hole 3127, and the upper end of the outlet chamber 432 is in communication with the outlet port 3126. In addition, the second upper surface 41 of the second housing 4 is provided with a first receiving hole 411 through which the nozzle assembly 19 passes, and the second lower surface 42 is provided with a second receiving hole 421 for positioning the nozzle assembly 19. The second receiving hole 421 is larger than the first receiving hole 411 to form a stepped hole. The nozzle assembly 19 protrudes upward from the second upper surface 41 and is received in the receiving cavity 322. With this arrangement, a high pressure urea solution can be delivered to the urea nozzle 12. In addition, the second upper surface 41 is further provided with a third threading hole 412 communicating with the second receiving hole 421 . The third threading hole 412 is aligned with the first threading hole 618 for the conductive wire 124 of the nozzle assembly 19 to pass through.

Referring to FIGS. 40 to 43 , the third housing 5 is located below the second housing 4 and is connected to the second housing 4 . The third housing 5 includes a body portion 51, a protrusion 52 extending downward from the body portion 51, and a flange 53 extending outward from the body portion 51, wherein the flange 53 is provided with a plurality of mounting holes 531, for the bolt 66 to pass through. The body portion 51 is provided with a third upper surface 511, and the third upper surface 511 is provided with a third annular groove 512 and a third island portion 513 surrounded by the third annular groove 512. The third island portion 513 is provided with a third positioning hole 5111 extending through the third upper surface 511 , a fourth positioning hole 5122 extending through the third upper surface 511 , and communicating with the third positioning hole 5111 and the fourth positioning hole 5112 . The second unloading groove 5113. The third housing 5 is provided with a third sleeve 78 received in the third positioning hole 5111 and a fourth sleeve 79 received in the fourth positioning hole 5112 . The lower end of the first gear shaft 741 is positioned in the third sleeve 78, and the second gear shaft 751 The lower end is positioned in the fourth bushing 79.

In addition, the third island portion 513 is further provided with a second guiding groove 5114 and a third guiding groove 5115 on the third upper surface 511, wherein the second guiding groove 5114 and the third positioning hole 5111 In communication, the third guiding groove 5115 is in communication with the fourth positioning hole 5112. Referring to FIG. 43, the second guiding groove 5114 and the third guiding groove 5115 are obliquely disposed inside the third housing 5. Referring to FIG. 34, the lower end of the liquid discharge chamber 432 is in communication with both the second flow guiding groove 5114 and the third flow guiding groove 5115.

In operation, the urea solution enters the inlet passage 332 from the urea connection pipe 333, and the urea solution enters the inlet chamber 431 from the third connection hole 3127. After being pressurized by the gear pump, a part of the high pressure urea solution is taken from the outlet passage 16 Entering the metal cover 62, another portion of the high pressure urea solution enters the third and fourth positioning holes 5111, 5112 from the second and third flow guiding grooves 5114, 5115 to lubricate the third and fourth sleeves 78, 79, thereby improving The smoothness of the rotation of the gear pump reduces wear.

The high-pressure urea solution entering the metal cover 62 is divided into three paths, and the first path enters the first sleeve 76 from the first guide groove 3123 to achieve lubrication; the second path penetrates into the second sleeve 77 to realize Lubrication; the third way enters into the receiving cavity 322 from the first connecting hole 3124; the fourth way communicates with the overflow element 173 from the second connecting hole 3125. When the pressure is less than the set value of the overflow element 173, the overflow element 173 is closed, the second connection hole 3125 is blocked from the liquid inlet passage 332; and when the pressure is greater than the set value of the overflow element 173, the overflow element 173 is opened. A portion of the urea solution enters the inlet passage 332 to achieve pressure relief.

It will be understood that in the illustrated embodiment of the invention, the inlet passage 15 includes a feed passage 332, a third connection port 3127, and an inlet chamber 431. Since the inlet passage 15 is located upstream of the urea pump 11, it is called a low pressure passage. The outlet passage 16 includes a liquid outlet chamber 432, a first flow guiding groove 3123, a first connecting hole 3124, a second connecting hole 3125, a second guiding groove 5114, a third guiding groove 5115, and the like. Since the outlet passage 16 is located downstream of the urea pump 11, it is referred to as a high pressure passage.

Referring to FIGS. 44-56, the nozzle assembly 19 includes a nozzle assembly housing 190 and a urea nozzle 12 that mates with the nozzle assembly housing 190.

The nozzle assembly housing 190 includes a main body portion 91, an extending portion 92 extending downward from the main body portion 91, and a mounting flange 93 extending outward from the main body portion 91. The mounting flange 93 is provided with a plurality of mounting holes 931. The main body portion 91 is provided with a fourth upper surface 911 and a fourth side surface 912. The fourth upper surface 911 is provided with a receiving cavity 94 for receiving the urea nozzle 12 and a recess 95 for receiving the convex portion 52. Referring to FIG. 53, the receiving cavity 94 extends downward into the extension 92.

The nozzle assembly housing 190 is also provided with the cooling assembly to cool the urea nozzle 12. In the illustrated embodiment of the invention, the cooling assembly is a water cooled assembly. A cooling passage 141 located within the nozzle assembly housing 190 includes the through The first cooling passage 913 of the fourth side 912 and the second cooling passage 914 spaced apart from the first cooling passage 913. The first cooling passage 913 is in communication with the inlet joint 103, and the second cooling passage 914 is in communication with the outlet joint 104. The nozzle assembly housing 190 is provided with an end cap 96 that seals around the periphery of the extension 92. In the illustrated embodiment of the invention, the end cap 96 is welded to the extension 92. As such, the nozzle assembly housing 190 forms an annular cooling groove 916 that communicates between the first cooling passage 914 and the second cooling passage 915 between the end cap 96 and the extension portion 92.

In the illustrated embodiment of the invention, the mounting flange 93 is integrally machined with the body portion 91. Of course, in other embodiments, the mounting flange 93 can also be fabricated separately from the body portion 91 and then welded together.

Referring to FIG. 45, in the illustrated embodiment of the present invention, the urea nozzle 12 includes a nozzle coil 121, a magnetic portion 81 that interacts with the nozzle coil 121, and a valve needle located below the magnetic portion 81. The portion 82, a spring 83 acting between the magnetic portion 81 and the valve needle portion 82, and a valve seat 84 (shown in Fig. 5) that is engaged with the valve needle portion 82. The nozzle coil 121 is wound around the periphery of the magnetic portion 81. The urea nozzle 12 further includes a sleeve portion 122 that is sleeved around the periphery of the nozzle coil 121. The spring 83 is mounted in the magnetic portion 81 and the valve needle portion 82. The valve needle portion 82 is provided with a tapered portion 821 and a valve needle 822 extending downward from the tapered portion 821. Referring to FIG. 57, the valve seat 84 includes a swirling vane 85 welded to the extension portion 92. The swirling plate 85 is provided with an injection hole 851 that cooperates with the valve needle 822 and a plurality of swirl grooves 852 that communicate with the injection hole 851. Referring to FIG. 10 , FIG. 44 and FIG. 57 , the magnetic portion 81 is sleeved with a third sealing ring 812 to seal against the inner wall of the receiving cavity 322 . In addition, a fourth sealing ring 123 matching the urea nozzle 12 is disposed in the accommodating cavity 94 to achieve sealing with the inner wall of the accommodating cavity 94.

Referring to FIG. 57, the extension portion 92 is provided with a manifold 921, and the valve needle 822 extends into the manifold 921. The magnetic portion 81 is provided with a first communication hole 811 communicating with the receiving cavity 322, and the valve needle portion 82 is provided with a second communication hole 823 communicating with the first communication hole 811, the tapered portion The 821 is provided with a third communication hole 824 that communicates the second communication hole 823 with the manifold 921. The swirl groove 852 is in communication with the manifold 921. A lower portion of the sleeve portion 122 is received in the accommodating cavity 94, and a portion of the sleeve portion 122 protruding from the fourth upper surface 911 is received in the accommodating cavity 322. The annular cooling groove 916 is located at the periphery of the collecting chamber 921.

It will be appreciated that in other embodiments of the invention, for example, an integrated device is applied to inject fuel into the exhaust of the engine to effect regeneration of the downstream diesel particulate filter (DPF). In this application, the urea pump 11 can be replaced with a fuel pump, which can be replaced with a fuel nozzle, which can be replaced with a fuel. Such changes can be understood by those skilled in the art and will not be described herein.

In order to facilitate the understanding of the present invention, the urea pump and the fuel pump are collectively referred to as a pump, the urea nozzle and the fuel nozzle are collectively referred to as a nozzle, and the urea solution and fuel are collectively referred to as a fluid medium.

Compared with the prior art, the integrated device 1 of the present invention is an integrated design, which can omit or shorten the prior art urea pipe for connecting the pump and the nozzle, and can also save the prior art pump supply. The connectors between the various sensors and the harness in the unit can also be used without the need to heat the defrosting device, so the reliability is high. The integrated device 1 of the present invention is compact in structure and small in size, and is convenient for installation of various types of vehicles. In addition, in the integrated device 1 of the present invention, the internal fluid medium passage is short, the pressure drop is small, the dead volume between the pump and the nozzle is small, and the efficiency is high. The temperature sensor 171 and the pressure sensor 172 are close to the nozzle, and the injection pressure accuracy is high. In addition, by independently controlling the pump and the nozzle separately, it is avoided that the action of the nozzle is driven by the action of the pump, thereby improving the accuracy of the control. Since the injection accuracy of the nozzle is improved, the amount of urea injected into the exhaust gas can be appropriately proportional to the nitrogen oxide compound, and the risk of crystallization due to excessive injection of urea is lowered. The integrated device 1 of the present invention can be water-cooled so that the temperature of the urea remaining in the integrated device 1 does not reach the crystallization point, and crystallization is less likely to occur.

The above embodiments are only intended to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of the present specification should be based on those skilled in the art, although the present specification has been described in detail with reference to the above embodiments. It should be understood by those skilled in the art that the present invention may be modified or equivalently modified by those skilled in the art without departing from the spirit and scope of the invention. Within the scope of the claims of the present invention.

Claims (34)

1. An integrated pump and nozzle device, wherein the pump is configured to pump a fluid medium to the nozzle, the nozzle for injecting the fluid medium into an exhaust of an engine, wherein the integrated device comprises a pump An assembly and a nozzle assembly, wherein the pump assembly is provided with a receiving cavity at least partially receiving the nozzle assembly; the pump assembly includes a pump assembly housing and the pump cooperating with the pump assembly housing, the pump An assembly housing includes an inlet passage upstream of the pump and in communication with the pump, and an outlet passage downstream of the pump and in communication with the pump, the outlet passage being in communication with the nozzle assembly; the pump The assembly includes a motor coil for driving the pump, a magnetic body that interacts with the motor coil, and a first gear assembly and a second gear assembly that mesh with each other, wherein the first gear assembly includes a first gear shaft and a a gear, the second gear assembly including a second gear shaft and a second gear, the first gear and the second gear meshing with each other; the nozzle assembly including a nozzle assembly And a nozzle cooperating with the nozzle assembly housing, the nozzle assembly further comprising a nozzle coil for driving the nozzle, wherein the motor coil and the nozzle coil are independently controlled, the pump A component housing is secured to the nozzle assembly housing.
2. The integrated device of claim 1 wherein said pump is a urea pump, said nozzle is a urea nozzle, and said fluid medium is a urea solution.
3. The integrated device of claim 1 wherein said pump is a fuel pump, said nozzle is a fuel nozzle, and said fluid medium is a fuel.
4. The integrated device according to claim 2, wherein said integrated device includes a controller coupled to said motor coil and said nozzle coil, said controller respectively performing said urea pump and said urea nozzle Independent control.
5. The integrated device of claim 2 wherein said integrated device includes a pressure sensor in communication with said outlet passage and an overflow member coupled between said outlet passage and said inlet passage.
6. The integrated device of claim 2 wherein said integrated device comprises a temperature sensor mounted within said housing.
7. The integrated device according to claim 2, wherein said pump assembly comprises a metal cover for accommodating said magnetic body, said motor coil being sleeved at a periphery of said metal cover; said first gear shaft being active a shaft, the second gear shaft is a driven shaft, The first gear shaft is higher than the second gear shaft.
8. The integrated device of claim 7 wherein said pump assembly further comprises an elastomer housed within said metal cover and beneath said magnetic body, said elastomer being compressible to absorb urea precipitate The volume of expansion produced by ice.
9. The integrated device according to claim 1, wherein said pump assembly housing is provided with a gear groove for accommodating said first gear and said second gear, said first gear and said second gear Engagement, one side of the gear groove is provided with an inlet chamber communicating with the inlet passage, and the other side of the gear groove is provided with an outlet chamber communicating with the outlet passage.
10. The integrated device according to claim 1, wherein said nozzle assembly includes a magnetic portion that interacts with said nozzle coil, a valve needle portion that is located below said magnetic portion, acts on said magnetic portion and said a spring between the valve needle portions and a valve seat that cooperates with the valve needle portion.
11. The integrated device according to claim 10, wherein said nozzle coil is located at a periphery of said magnetic portion, said valve needle portion is provided with a valve needle, and said valve seat is provided to cooperate with said valve needle Spray holes.
12. The integrated device of claim 11 wherein said valve seat includes a swirling vane welded to said nozzle assembly housing, said injection orifice being disposed on said swirling fin, and said swirling flow The sheet is also provided with a plurality of swirl grooves that communicate with the injection holes.
13. The integrated device of claim 2 wherein said integrated device is provided with a cooling assembly for cooling said urea nozzle, said cooling assembly cooling said urea nozzle by a cooling medium.
14. The integrated device of claim 4 wherein said pump assembly housing is provided with a housing at the top, said housing being provided with a housing cavity; said controller being provided with said housing a control board in the cavity, the motor coil and the nozzle coil are electrically connected to the control board.
15. The integrated device according to claim 14, wherein said casing is provided with a through hole communicating with said casing cavity and a waterproof and permeable cover fixed in said through hole; said control plate is welded There is a cable plug that is exposed outside the casing.
16. The integrated device of claim 14 wherein said pump assembly housing is provided with a first housing and a web assembly clamped between said housing and said first housing, said The connecting plate assembly includes a plate portion and a metal cover fixed on the plate portion and protruding upward, the magnetic body is received in the metal cover, and the motor coil is sleeved outside the metal cover The plate portion is provided with a plurality of mounting cylinders fixed thereon, the mounting cylinders are provided with internal threads, and the control panel is provided with a plurality of openings corresponding to the mounting cylinders, and a plurality of screws are passed through The opening is then screwed into the internal thread to secure the control panel.
17. The integrated device according to claim 16, wherein said motor coil is provided with a bracket and a coil wound around said bracket, said bracket being provided with a hole for receiving said metal cover and a plurality of mountings extending downward column.
18. The integrated device according to claim 16, wherein said first casing is provided with a liquid inlet passage connected to the urea joint, said first casing comprising a first upper surface, a first lower surface, and the first a side surface, wherein the first upper surface is provided with a first annular groove, a first island portion surrounded by the first annular groove, and a first sealing ring received in the first annular groove, the first seal a ring is located below the metal cover, the plate portion pressing down the first sealing ring; the first island portion is provided with a first through the first upper surface and the first lower surface a positioning hole and a second positioning hole penetrating the first lower surface, the urea pump including a first sleeve received in the first positioning hole and a second sleeve received in the second positioning hole Wherein the first gear shaft is inserted into the first bushing and the second gear shaft is inserted into the second bushing.
19. The integrated device according to claim 18, wherein the first lower surface is provided with a first relief groove that communicates with the first positioning hole and the second positioning hole.
20. The integrated device according to claim 18, wherein said first island portion further comprises a first flow guiding groove extending through said first upper surface and communicating with said second positioning hole, extending through said first An upper surface and an exit hole of the first lower surface, and a first connection hole penetrating the first upper surface and communicating with the receiving cavity, the outlet hole being in communication with the outlet passage.
21. The integrated device according to claim 18, wherein the first upper surface further comprises a pressure sensor receiving hole located at a side of the first island portion for receiving a pressure sensor; The receiving cavity is connected to the pressure sensor receiving hole through the first lower surface.
22. The integrated device according to claim 20, wherein said first housing is provided with a third connecting hole penetrating said first lower surface and communicating with said liquid inlet passage; said first housing further And an overflow component receiving groove communicating with the liquid inlet passage and the second connecting hole, wherein the overflow component receiving groove extends outwardly through the first side; the integrated device is disposed to be installed on the overflow The flow element houses an overflow element within the tank; when the pressure of the outlet passage is above a set value, the overflow element opens to return a portion of the urea solution to the inlet passage.
23. The integrated device of claim 22 wherein said pump assembly housing includes a second housing located below said first housing and coupled to said first housing, said second housing The body includes a second upper surface, a second lower surface, and a gear groove extending through the second upper surface and the second lower surface for receiving the first gear and the second gear, and one side of the gear groove is provided An inlet chamber communicating with the third connection hole, and the other side of the gear groove is provided with an outlet chamber communicating with the outlet port.
24. The integrated device according to claim 23, wherein said pump assembly housing comprises a third housing located below said second housing and coupled to said second housing, said third housing The body includes a body portion and a protrusion extending downward from the body portion, wherein the body portion is provided with a third upper surface, the third upper surface is provided with a third annular groove, and the third annular groove is a third island portion, the third island portion is provided with a third positioning hole and a fourth positioning hole penetrating the third upper surface, and the third positioning hole and the fourth positioning hole extend into the In the boss portion, the urea pump includes a third bushing housed in the third positioning hole and a fourth bushing housed in the fourth positioning hole, wherein the first gear shaft is inserted into the In the third bushing, the second gear shaft is inserted into the fourth bushing.
25. The integrated device according to claim 24, wherein the third island portion is provided with a second unloading groove that communicates with the third positioning hole and the fourth positioning hole; a second guiding groove and a third guiding groove are disposed on the third upper surface, wherein the second guiding groove is in communication with the third positioning hole, the third guiding groove and the first The four positioning holes are connected.
26. The integrated device according to claim 24, wherein said nozzle assembly housing includes a main body portion and an extending portion extending downward from said main body portion, said main body portion being provided with a receiving chamber for housing said urea nozzle And a recess for receiving the raised portion, the receiving cavity extending downward into the extension.
27. The integrated device of claim 1 wherein said pump assembly housing and said nozzle assembly housing are secured together from bottom to top by bolts.
28. The integrated device according to claim 26, wherein said nozzle assembly includes a magnetic portion that interacts with said nozzle coil, a valve needle portion that is coupled to said magnetic portion, and a spring that acts on said valve needle portion The extending portion is provided with a collecting chamber communicating with the receiving cavity, wherein the magnetic portion is at least partially received in the receiving cavity, and a portion of the magnetic portion protruding from the second upper surface is received in the Said in the containment chamber.
29. The integrated device according to claim 28, wherein said spring is mounted in said magnetic portion and said valve needle portion, said valve needle portion being provided with a tapered portion and extending downward from said tapered portion a valve needle extending into the manifold, The magnetic portion is provided with a first communication hole communicating with the accommodating cavity, and the valve needle portion is provided with a second communication hole communicating with the first communication hole, and the tapered portion is provided with the a second communication hole in which the communication hole communicates with the manifold.
30. The integrated device of claim 29 wherein said nozzle assembly includes said valve pin mating valve seat, said valve seat including a swirling vane welded to said extension, said swirling The sheet is provided with an injection hole that cooperates with the valve needle and a plurality of swirl grooves that communicate with the injection hole, and the swirl groove communicates with the manifold.
31. The integrated device according to claim 30, wherein said nozzle assembly housing is provided with a first cooling passage, a second cooling passage spaced from said first cooling passage, and a periphery of said extension An end cap, the annular assembly cooling chamber forming an annular cooling groove connecting the first cooling passage and the second cooling passage between the end cover and the extension portion, the first cooling passage and the inlet A joint connection is provided for injection of engine coolant, and the second cooling passage is coupled to the outlet joint for engine coolant to flow out.
32. An exhaust aftertreatment system comprising an exhaust aftertreatment exhaust system and an exhaust aftertreatment packaging system, wherein the injection system comprises the integrated device of any one of claims 1 to 31, the packaging system comprising A carrier located downstream of the integrated device.
33. The exhaust aftertreatment system of claim 32 wherein said carrier comprises selective catalytic reduction, said packaging system further comprising at least one mixer between said integrated device and said carrier.
34. A control device for an integrated device, characterized in that the integrated device is the integrated device according to any one of claims 1 to 31, the control method comprising:

    Driving the pump to operate, drawing the fluid medium into the pump through the inlet passage;

    After the pump is pressurized, the fluid medium is delivered to the nozzle through the outlet passage;

    When the injection condition is reached, energizing the nozzle coil, at least partially opening the nozzle to inject the fluid medium into the exhaust of the engine; wherein:

    The motor coil and the nozzle coil are independently controlled.

Images