WO2017211233A1 - 集成装置、尾气后处理系统以及控制方法 - Google Patents

集成装置、尾气后处理系统以及控制方法 Download PDF

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Publication number
WO2017211233A1
WO2017211233A1 PCT/CN2017/086987 CN2017086987W WO2017211233A1 WO 2017211233 A1 WO2017211233 A1 WO 2017211233A1 CN 2017086987 W CN2017086987 W CN 2017086987W WO 2017211233 A1 WO2017211233 A1 WO 2017211233A1
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WIPO (PCT)
Prior art keywords
pump
nozzle
assembly
gear
urea
Prior art date
Application number
PCT/CN2017/086987
Other languages
English (en)
French (fr)
Inventor
杨振球
樊高峰
彭威波
陈国立
宋红卫
王学良
李琦
Original Assignee
天纳克（苏州）排放系统有限公司
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Publication of WO2017211233A1 publication Critical patent/WO2017211233A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/06—Valve members or valve-seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1433—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • 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.
  • the post-treatment technology commonly used in the industry is selective catalytic reduction (SCR), and the exhaust gas is installed upstream of the SCR.
  • SCR selective catalytic reduction
  • 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.
  • 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.
  • the existing urea injection system contains many components, and the installation is complicated and the cost is high.
  • the present invention adopts the following technical solutions:
  • 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 located at the 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 housing including a first housing, the inlet passage being located within the first housing;
  • the pump assembly includes a motor coil driving 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 gear assembly includes a second gear shaft and a second gear, the first gear and the second gear mesh with each other; the pump assembly housing is provided with the first gear and the second gear a gear groove, one side
  • the pump is a urea pump
  • the nozzle is a urea nozzle
  • the fluid medium is a urea solution.
  • 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.
  • the integrated device includes an overflow element connected between the outlet passage and the inlet passage.
  • the nozzle coil is located at a periphery of the magnetic portion, the valve needle portion is provided with a valve needle, and the valve seat body is provided with an injection hole that cooperates with the valve needle.
  • the valve needle portion can move back and forth against the elastic force of the spring under the magnetic force of the nozzle coil, and a periphery of the valve needle and the valve seat body are formed.
  • the swirl plate is made by one or more methods of stamping, casting, machining, and etching.
  • 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.
  • the carrier comprises selective catalytic reduction
  • the packaging system further comprises at least one mixer between the integrated device and the carrier.
  • a control method of an integrated device comprising:
  • the fluid medium is delivered to the nozzle through the outlet passage;
  • the motor coil and the nozzle coil are independently controlled.
  • 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.
  • the motor coil and the nozzle coil 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.
  • 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.
  • the present invention allows the swirling plate to be completed using various mature processing techniques by providing a swirling plate which is manufactured separately from the valve seat body and abuts against the valve seat body, and has a low cost.
  • the innovative process of the invention is simple and simple, and the problem of complicated processing technology and poor quality control in the prior art is well solved.
  • 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.
  • FIG. 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 front elevational view of Figure 3.
  • Figure 7 is a right side 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 partially exploded perspective view of the pump assembly of Figure 10 with the housing, motor coil and venting cover separated.
  • Figure 12 is a perspective view of the housing of Figure 11 assembled with the motor coil.
  • Figure 13 is an exploded perspective view of Figure 12 .
  • Figure 14 is a further exploded perspective view of Figure 11 with the control panel separated.
  • Figure 15 is an exploded perspective view showing the cover of Figure 14 and the control panel removed, wherein the connector assembly is separated.
  • Figure 16 is a perspective view of the connecting plate assembly of Figure 15.
  • Figure 17 is an exploded perspective view of the connecting plate assembly of Figure 15.
  • Figure 18 is a further exploded perspective view of Figure 15 with the magnetic body, elastomer and screws separated.
  • Figure 19 is a further exploded perspective view of Figure 18 with the first seal ring, temperature sensor and pressure sensor separated.
  • Fig. 20 is an exploded perspective view showing the magnetic body, the elastic body, the screw, and the like in Fig. 19;
  • Figure 21 is a schematic cross-sectional view of Figure 20 taken along an angle after assembly.
  • Figure 22 is a perspective view of the pressure sensor of Figure 19.
  • Figure 23 is a perspective view of another angle of Figure 22.
  • Figure 24 is an exploded perspective view of Figure 22 .
  • Figure 25 is a cross-sectional view taken along line C-C of Figure 22.
  • Fig. 26 is a partially exploded perspective view showing the first seal ring, the temperature sensor, the pressure sensor, and the like in Fig. 19, wherein the first casing is separated.
  • Figure 27 is an exploded perspective view of the first housing of Figure 26.
  • Figure 28 is an exploded perspective view of Figure 27 at another angle.
  • Figure 29 is a perspective view of a portion of the first housing of Figure 27.
  • Figure 30 is a perspective view of Figure 29 at another angle.
  • Figure 31 is a plan view of Figure 30.
  • Figure 32 is a cross-sectional view taken along line D-D of Figure 31.
  • Figure 33 is a schematic cross-sectional view taken along line E-E of Figure 31.
  • Figure 34 is a cross-sectional view taken along line F-F of Figure 31.
  • Figure 35 is a plan view of Figure 29.
  • Figure 36 is a schematic cross-sectional view taken along line G-G of Figure 35.
  • Figure 37 is a cross-sectional view taken along line H-H of Figure 35.
  • Figure 38 is a cross-sectional view taken along line I-I of Figure 35.
  • Figure 39 is a perspective view of the first housing of Figure 26 removed.
  • Figure 40 is a partial exploded perspective view of Figure 39 with the first gear assembly and the second gear assembly separated.
  • FIG. 41 is a plan view of FIG. 39.
  • FIG. 42 is an exploded perspective view of the first gear assembly and the second gear assembly of FIG. 40 after removal.
  • Figure 43 is a perspective view of the second housing of Figure 42.
  • Figure 44 is a perspective view showing another angle of Figure 43.
  • Figure 45 is a perspective view of the third housing assembly of Figure 42.
  • Figure 46 is a plan view of Figure 45.
  • Figure 47 is a cross-sectional view taken along line J-J of Figure 46.
  • Figure 48 is a schematic cross-sectional view taken along line K-K of Figure 46.
  • Figure 49 is a partially exploded perspective view of the nozzle assembly of the present invention.
  • Figure 50 is a partially exploded perspective view of the urea nozzle of Figure 49.
  • Figure 51 is a perspective view of the nozzle assembly housing of Figure 49.
  • Figure 52 is a partially exploded perspective view of Figure 51.
  • Figure 53 is a top plan view of a portion of the nozzle assembly housing 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 54.
  • Figure 56 is a schematic cross-sectional view taken along line N-N of Figure 54.
  • Figure 57 is a perspective view of another angle of Figure 53.
  • Figure 58 is an exploded perspective view of the integrated device of the present invention.
  • Figure 59 is a schematic cross-sectional view taken along line A-A of Figure 9.
  • Figure 60 is a schematic cross-sectional view taken along line O-O of Figure 59.
  • Figure 61 is a schematic cross-sectional view taken along line P-P of Figure 59.
  • Figure 62 is a cross-sectional view taken along line Q-Q of Figure 60.
  • Figure 63 is a schematic cross-sectional view taken along line R-R of Figure 61.
  • Figure 64 is a cross-sectional view taken along line B-B of Figure 9.
  • Figure 65 is a schematic cross-sectional view taken along line S-S of Figure 64.
  • Figure 66 is an exploded perspective view of the swirling sheet of Figure 52 in another embodiment.
  • Figure 67 is a perspective view of the swirl plate of Figure 66.
  • Figure 68 is a plan view of the swirl plate of Figure 67.
  • 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 An integrated device 1 that injects urea solution into the exhaust of the engine 10 (eg, into the exhaust pipe 106 or within the packaging system 300); the packaging system 300 includes a mixer 301 located downstream of the integrated device 1 and located at the The carrier 302 downstream of the mixer 301 is described. 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.
  • 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.
  • the integrated device 1 in the first circulation loop 101, 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.
  • 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.
  • the exhaust gas aftertreatment system 100 of the present invention is further provided.
  • 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.
  • 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.
  • inlet in the "inlet passage 15" and “outlet” in the “outlet passage 16" are referenced by the urea pump 11, that is, the upstream of the urea pump 11 is the inlet, and the urea pump 11 The downstream is the exit.
  • the outlet passage 16 is in communication with the urea nozzle 12 to pump a urea solution to the urea nozzle 12. It can be understood that the inlet passage 15 is located upstream of the urea pump 11 and is a low pressure passage; the outlet passage 16 is located downstream of the urea pump 11 and is a high pressure passage.
  • 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.
  • 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.
  • 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, to release the urea solution located in the high pressure passage into the low pressure passage or directly return to the In the urea tank 201, pressure regulation is achieved.
  • the urea pump 11 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 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.
  • the controller 13 can also receive other signals, such as signals from the CAN bus that are related to engine operating parameters.
  • the controller 13 can also obtain the rotational speed of the urea pump 11.
  • 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.
  • 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.
  • 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.
  • 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.
  • the controller 13 collects and/or calculates required signals such as temperature, pressure, pump speed, and the like.
  • 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.
  • the controller 13 independently controls the urea pump 11 and the urea nozzle 12.
  • the integrated device 1 includes a pump assembly 18, a nozzle assembly 19, and a controller 13.
  • the nozzle assembly 19 is at least partially inserted into the pump assembly 18 and assembled together by a plurality of mounting bolts 64.
  • 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. Illustrated in the present invention, the first housing 3, the second housing 4, and the third housing 5 are each made of a metal material.
  • 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.
  • the controller 13 is mounted with a chip and other electronic components, which generate heat during operation, causing the surrounding air to expand.
  • the present invention solves the problem of crushing the chip due to air expansion by providing the waterproof and permeable cover 24. / or the problem of electronic components, but also can play a waterproof effect.
  • the waterproof venting cover 24 can improve the environment in which the controller 13 is placed to enable it to meet operating conditions.
  • the casing 2 is made of a metal material having a better heat dissipation effect.
  • the cover 2 may also be provided with a plurality of fins (not shown) on the outside to enhance the heat dissipation effect.
  • 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.
  • the control panel 131 is annular and is provided with a central aperture 135 in the middle.
  • the pump assembly 18 is also provided with a plurality of support posts 631 mounted on the first housing 3 and for supporting the control panel 131.
  • the pump assembly housing 180 is further provided with a connecting plate assembly 6 between the casing 2 and the first casing 3.
  • 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 control board 131 is sandwiched by the support post 631 and the cover 2 and forms a gap with the connecting plate assembly 6 to facilitate the control panel 131 to perform more. Good heat dissipation and better avoid interference.
  • the plate portion 61 is provided with a through hole 614, a first threading hole 618, and a through hole 615 extending through the upper and lower surfaces thereof.
  • the pressure sensor 172 at least partially passes through the through hole 614
  • the temperature sensor 171 at least partially passes through the through hole 615.
  • 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 through hole 615, and is electrically connected to the control.
  • On the board 131 In addition, referring to FIG.
  • the plate portion 61 is provided with a plurality of mounting holes 611 through which the screws 133 pass.
  • the plate portion 61 is provided with a through hole 617 corresponding to the metal cover 62.
  • the lower end of the metal cover 62 is welded to the inner wall of the perforation 617.
  • the urea pump 11 is a gear pump including a motor coil 111, the metal cover 62, an elastic body 71 located in the metal cover 62, and a magnetic body 72. a first sealing ring 73 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 flow rate 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. Referring to FIGS. 12 and 13, 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.
  • the motor coil 111 is interference fit within the housing cavity 21, such that the motor can be placed without the use of additional fastening elements (eg screws, etc.)
  • the coil 111 is formed integrally with the casing cavity 21, thereby reducing the number of parts.
  • the urea pump 11 further includes an outer sleeve 723 that houses the magnetic body 72. The outer sleeve 723 is directly received in the metal cover 62.
  • the motor coil 111 is sleeved on the periphery of the metal cover 62.
  • the sheet portion 61 presses down the first seal ring 73 to effect sealing.
  • 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 metal skeleton 720 is provided with a partitioning plate 721 between the elastic body 71 and the magnetic body 72.
  • 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 (refer to FIG. 59).
  • the end of the metal skeleton 720 is provided with a hook portion 724 that is pressed against the elastic body 71.
  • the hook portion 724 is provided with a guiding cone surface 725 that is easy to sleeve the elastic body 71 onto the metal frame 720.
  • the elastic body 71 is provided with a radially extending fitting hole 711.
  • the metal frame 720 is provided with a fixing hole 726 corresponding to the mounting hole 711.
  • the upper end of the first gear assembly 74 is mounted on the mounting hole 711 and the fixing hole.
  • the screw 722 in 726 is radially fixed to the metal skeleton 720.
  • the pressure sensor 172 includes a substrate 176, a circuit board 177 fixed on the substrate 176, and a conductive connection connected to the circuit board 177.
  • the substrate 176 is provided with a plate body portion 1761 and a protrusion portion 1762 extending downward from the plate body portion 1761.
  • a sealing ring 1722 is mounted on the protrusion portion 1762.
  • the protruding portion 1762 is provided with a through hole 1763 penetrating downward, and the through hole 1763 penetrates the plate body portion 1761 and the circuit board 177 upward.
  • the circuit board 177 is provided with a chip 1771 at a position corresponding to the through hole 1763.
  • the protective cover 178 is mounted on the periphery of the chip 1771 to protect the core Sheet 1771.
  • the protective cover 178 has a rectangular parallelepiped shape, and the protective cover 178 is provided with a hole 1781 communicating with the chip 1771.
  • the pressure sensor 172 of the present invention does not have a separate package housing, but subtly borrows the cover 2 as its package housing. With this arrangement, the volume can be reduced, the installation can be facilitated, the cost can be reduced, and the like.
  • the pressure sensor 172 is a differential pressure sensor that is converted into an electrical signal by a differential pressure change across the upper and lower ends of the chip 1771.
  • the working principle of the differential pressure sensor which is well known to those skilled in the art, no further details are provided herein.
  • the first housing 3, the second housing 4, and the third housing 5 are machined parts, and are bolted by the upper part. And the bottom 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 (as shown in FIG. 64).
  • 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 a second positioning hole 3122 extending through the first lower surface 32. a first upper surface 31 and a first connection hole 3123 communicating with the inlet passage 15 and a first guide groove 3124 penetrating the first upper surface 31 and communicating with the second positioning hole 3122.
  • the urea pump 11 is provided with a first sleeve 76 housed in the first positioning hole 3121 and a second received in the second positioning hole 3122. Bushing 77.
  • the first housing 3 further includes an internally threaded hole 317 corresponding to the screw 133.
  • the first housing 3 further includes a plurality of first assembly holes 318 through which the bolts 66 pass, the first assembly holes 318 extending through the first upper surface 31 and the first lower surface 32.
  • 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 temperature sensor receiving hole 314 for receiving the temperature sensor 171. Referring to FIG. 59, the seal ring 1722 on the pressure sensor 172 and the inner wall of the pressure sensor receiving hole 313 are sealed. The pressure sensor 172 is pressed by the sheet portion 61 to achieve fixation.
  • first housing 3 is further provided with an outwardly protruding mounting flange 315, and the mounting flange 315 is provided with a second mounting hole 316 corresponding to the first mounting hole 23.
  • the bolts 63 are sequentially passed through the second mounting holes 316 and the support posts 631 and fastened in the internal threads of the first mounting holes 23.
  • the first casing 3 is provided with a liquid inlet passage 332 extending through the first side surface 33 to be connected to the urea joint 331.
  • the first housing 3 is provided with a second connection hole 3127 that penetrates the first lower surface 32 and communicates with the liquid inlet passage 332.
  • the first connection hole 3123 and the second connection hole 3127 are both perpendicular to the liquid inlet channel 332.
  • the first positioning hole 3121, the second positioning hole 3122, and the second connection hole 3127 each penetrate the second island portion 326 downward.
  • the second island portion 326 is also provided with an exit aperture 3126 extending through the first lower surface 32.
  • 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.
  • the first housing 3 is further provided with a receiving cavity 322 extending downwardly through the first lower surface 32 for receiving at least a portion of the nozzle assembly 19. Referring to FIGS. 33, 34, and 36, the receiving chamber 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 outlet hole 3126.
  • the exit aperture 3126 is sloped inside the first housing 3 and is generally inverted V-shaped.
  • the first housing 3 is provided with a second threading hole 323 corresponding to the first threading hole 618.
  • the first casing 3 is further provided with an overflow element receiving groove 319 which communicates with the liquid inlet passage 332 and the receiving cavity 322.
  • 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.
  • the first housing 3 is provided with a plug 5122 that fixes the overflow element 173. Referring to FIG.
  • the overflow element 173 is provided with a choke hole 1731 that constantly communicates the inlet passage 15 and the outlet passage 16. In this way, on the one hand, the pressure fluctuations of the system can be reduced, in particular when the nozzle assembly 19 is spraying urea; on the other hand, the urea solution can be kept flowing, thereby facilitating heat dissipation of the motor coil 111 and the like.
  • the urea joint 331 is in communication with the urea tank 201 through a urea connection pipe 333.
  • the exhaust gas aftertreatment system 100 may further be provided with a heating device 334 that heats the urea connection pipe 333.
  • the liquid inlet passage 332 extends horizontally into the interior of the first casing 3.
  • the liquid inlet channel 332 can also be at an angle.
  • the first gear assembly 74 includes a first gear shaft 741 and a first gear 742 fixed to the first gear shaft 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 mesh with each other.
  • the first gear 742 is externally meshed with the second gear 752.
  • the first gear shaft 741 is The 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 fixed in the metal frame 720.
  • the upper end of the second gear shaft 751 is positioned in the second boss 77.
  • the second housing 4 is located below the first housing 3 and is connected to the first housing 3 .
  • a plurality of positioning pins 328 are further disposed between the first housing 3 and the second housing 4.
  • 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 first gear 742 and 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.
  • the inlet chamber 431 is in communication with the second connection hole 3127, and the upper end of the outlet chamber 432 is in communication with the outlet port 3126.
  • 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.
  • the second upper surface 41 is further provided with a third threading hole 412 corresponding to the second threading hole 323.
  • the first threading hole 618, the second threading hole 323, and the third threading hole 412 are aligned with each other for the conductive wire 124 of the nozzle assembly 19 to pass through.
  • the second housing 4 further includes a plurality of second assembly holes 418 aligned with the first assembly apertures 318.
  • the third casing 5 is located below the second casing 4 and is connected to the second casing 4 .
  • the third housing 5 includes a body portion 51, a boss portion 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 the A plurality of third assembly holes 531 are aligned with the second assembly holes 418 for the bolts 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 annular groove 512 is for receiving the third sealing ring 732 (as shown in FIG. 64).
  • the third island portion 513 is provided with a third positioning hole 5111 penetrating the third upper surface 511 and a fourth positioning hole 5112 penetrating the third upper surface 511.
  • 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 bushing 78, and the lower end of the second gear shaft 751 is positioned in the fourth bushing 79.
  • 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 Connected, the third flow guiding groove 5115 and the fourth positioning hole 5112 Connected.
  • the second guiding groove 5114 and the third guiding groove 5115 are obliquely disposed inside the third housing 5.
  • 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.
  • the urea solution enters the inlet channel 332 from the urea connection tube 333, a portion of the urea solution enters the metal cover 62 from the first connection hole 3123, and another portion of the urea solution enters the inlet chamber 431 from the second connection hole 3127;
  • the urea solution located in the metal cover 62 directly penetrates into the first positioning hole 3121 to lubricate the first sleeve 76, and on the other hand penetrates into the second positioning hole 3122 along the first guiding groove 3124 to lubricate the second. Bushing 77.
  • the urea solution entering the liquid inlet chamber 431 is further divided into two paths, one of which enters the outlet passage 16 after being pressurized by the gear pump, and the other of which enters the third and fourth portions from the second and third flow guiding grooves 5114 and 5115, respectively.
  • the positioning holes 5111, 5112 are used to lubricate the third and fourth sleeves 78, 79 to improve the smoothness of the rotation of the gear pump and reduce wear.
  • the high pressure urea solution entering the outlet passage 16 enters the containment chamber 322 along the outlet port 3126 to flow to the nozzle assembly 19 while a portion of the urea solution flows to the overflow member 173.
  • the overflow element 173 When the pressure is less than the set value of the overflow element 173, the overflow element 173 is closed, communicating only through the choke hole 1731; and when the pressure is greater than the set value of the overflow element 173, the overflow element 173 is opened, part of the urea The solution enters the inlet passage 332 to achieve pressure relief.
  • the inlet passage 15 includes a feed passage 332, a second 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, an outlet hole 3126, a receiving chamber 322, 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.
  • 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 for mounting the integrated device 1 to the exhaust pipe 106 or the packaging system 300.
  • 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. 55, the receiving cavity 94 extends downward into the extension 92.
  • the main body portion 91 is further provided with a cylindrical portion 917 that protrudes upward into the accommodating chamber 94 to support the urea nozzle 12.
  • the nozzle assembly housing 190 is also provided with the cooling assembly to cool the urea nozzle 12.
  • the cooling assembly is a water cooled assembly.
  • a cooling passage 141 located within the nozzle assembly housing 190 includes a first cooling passage 913 extending through the fourth side 912 and a second cooling passage 914 spaced from the first cooling passage 913.
  • the first cooling passage 913 is in communication with the inlet joint 103
  • 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.
  • the end cap 96 is welded to the extension 92.
  • 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.
  • the mounting flange 93 is integrally machined with the body portion 91.
  • the mounting flange 93 can also be fabricated separately from the body portion 91 and then welded together.
  • 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 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.
  • 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. 50 and FIG.
  • the upper end of the magnetic portion 81 is sleeved with a fourth sealing ring 812 to seal against the inner wall of the receiving cavity 322, and the lower end of the magnetic portion 81 is sleeved.
  • the fifth seal ring 813 is sealed to the inner wall of the accommodating chamber 94.
  • the cylindrical portion 917 supports the valve needle portion 82, so that the valve needle portion 82 and the nozzle coil 121 can form a large overlap in the moving direction of the valve needle 822.
  • the electromagnetic force generated by the large nozzle coil 121 affects the valve needle portion 82, thereby reducing the drive current, reducing the power consumption of the urea nozzle 12, and reducing the amount of heat generation.
  • the accommodating chamber 94 is further provided with a spacer 86 that cooperates with the urea nozzle 12 to adjust a gap between the magnetic portion 81 and the valve needle portion 82. It can be understood that the stroke of the needle portion 82 is closely related to the above-described gap. By adjusting the gap by using the spacers 86 of different thicknesses, the stroke of the needle portion 82 can be accurately controlled to improve the accuracy of the urea nozzle 12.
  • 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.
  • the swirling plate 85 is of a split type, and includes a valve seat body 8512 that cooperates with the valve needle portion 82 and is manufactured separately from the valve seat body 8512 and abuts against The swirl plate 8511 on the valve seat body 8512.
  • the swirl plate 8511 is provided with a plurality of swirl grooves 852.
  • the valve seat body 8512 is provided with an injection hole 851 that cooperates with the valve needle 822.
  • the valve needle portion 82 can be moved back and forth against the elastic force of the spring 83 under the magnetic force of the nozzle coil 121, and a manifold is formed between the periphery of the valve needle 822 and the valve seat body 8512. 921, one end of the swirling groove 852 communicates with the collecting chamber 921, and the other end of the swirling groove 852 communicates with the injection hole 851 when the valve needle 822 is opened.
  • the swirl plate 8511 is made by one or more methods of stamping, casting, machining, and etching to improve the ejection accuracy. It will be appreciated that the form of the swirl groove 852 is not limited to the illustrated embodiment of the invention, and that any other form (e.g., spiral, etc.) capable of forming a swirling flow of urea is possible.
  • the present invention provides a swirling plate 8511 which is manufactured separately from the valve seat body 8512 and abuts against the valve seat body 8512, so that the swirling plate 8511 itself can be completed by various mature processing processes at a low cost.
  • the invention innovatively simplifies the spinning in the prior art, and solves the problems of complicated processing, low production efficiency and poor quality control in the prior art.
  • an integrated device is applied to inject fuel into the exhaust of the engine to effect regeneration of the downstream diesel particulate filter (DPF).
  • 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.
  • 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
  • the urea solution and fuel are collectively referred to as a fluid medium.
  • 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.
  • 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.
  • 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.

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Abstract

一种泵与喷嘴的集成装置（1）包括泵组件（18）和喷嘴组件（19）。该泵组件包括设有容纳喷嘴组件的收容腔（322）、泵组件壳体（180）以及泵（11）。该泵组件壳体包括入口通道（15）和出口通道（16），该出口通道与该喷嘴组件连通。该泵组件包括罩壳（2）、用以驱动该泵的电机线圈（111）、磁性体（72）以及相互啮合的第一齿轮组件（74）与第二齿轮组件（75）。该喷嘴组件包括喷嘴组件壳体（190）和喷嘴（12）。该喷嘴组件还包括阀座体（8512）和与该阀座体分开制造且贴靠在该阀座体上的旋流板（8511）。该集成装置结构简单、紧凑，控制精确较高。还公开了一种尾气后处理系统以及控制方法。

Description

集成装置、尾气后处理系统以及控制方法
本申请要求了申请日为2016年6月6日、申请号为201610393901.0、发明名称为“集成装置、尾气后处理系统以及控制方法”以及申请日为2016年9月13日、申请号为201610821175.8、发明名称为“喷嘴组件”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种集成装置、尾气后处理系统以及控制方法，属于发动机尾气后处理技术领域。
背景技术
随着内燃机汽车的排放标准越来越严，为了降低排气中氮氧化合物等有害物质，目前业界通常采用的后处理技术是选择性催化还原(SCR)，并在SCR的上游安装向排气中喷射尿素溶液。尿素溶液发生水解、热解产生氨气，并与氮氧化合物等发生化学反应，进而降低有害物质的浓度。
目前市场上的尿素喷射系统通常包括空气辅助系统和非空气辅助系统。当然，无论哪种系统均包括尿素箱总成、通过低压管道与所述尿素箱总成相连的泵供给单元、通过高压管道与泵供给单元相连的喷嘴模块以及控制器。泵供给单元中包括尿素泵以及压力传感器等，喷嘴模块包括尿素喷嘴等。尿素泵与尿素喷嘴间隔较远的距离，并通过尿素管相连。另外，现有的尿素喷射系统包含较多的零部件，安装复杂，成本较高。
因此，亟需提供一种新型的技术方案。
发明内容
本发明的目的在于提供一种控制比较精确的集成装置、尾气后处理系统以及控制方法。
为实现上述目的，本发明采用如下技术方案：
一种泵与喷嘴的集成装置，其中所述泵用以向所述喷嘴泵送流体介质，所述喷嘴用以向发动机的排气中喷射该流体介质，所述集成装置包括泵组件以及喷嘴组件；所述泵组件包括泵组件壳体以及与所述泵组件壳体相配合的所述泵，所述泵组件壳体包括位于所述泵的上游且与所述泵连通的入口通道以及位于所述泵的下游且与所述泵连通的出口通道，所述出口通道与所述喷嘴组件连通，所述泵组件壳体包括第一壳体，所述入口通道位于所述第一壳体内；所述泵组件包括用以 驱动所述泵的电机线圈、与所述电机线圈相互作用的磁性体以及相互啮合的第一齿轮组件与第二齿轮组件，其中所述第一齿轮组件包括第一齿轮轴以及第一齿轮，所述第二齿轮组件包括第二齿轮轴以及第二齿轮，所述第一齿轮与所述第二齿轮相互啮合；所述泵组件壳体设有收容所述第一齿轮与所述第二齿轮的齿轮槽，所述齿轮槽的一侧设有与所述入口通道连通的进液腔，所述齿轮槽的另一侧设有与所述出口通道连通的出液腔；所述喷嘴组件包括用以驱动所述喷嘴的喷嘴线圈、与所述喷嘴线圈相配合的磁性部、与所述喷嘴线圈相配合的阀针部、位于所述磁性部与所述阀针部之间的弹簧、与所述阀针部配合的阀座体以及与所述阀座体分开制造且贴靠在所述阀座体上的旋流板，所述旋流板设有旋流槽。
作为本发明进一步改进的技术方案，所述泵为尿素泵，所述喷嘴为尿素喷嘴，所述流体介质为尿素溶液。
作为本发明进一步改进的技术方案，所述集成装置包括与所述电机线圈以及所述喷嘴线圈连接的控制器，所述控制器分别对所述尿素泵以及所述尿素喷嘴进行独立控制。
作为本发明进一步改进的技术方案，所述集成装置包括连接在所述出口通道与所述入口通道之间的溢流元件。
作为本发明进一步改进的技术方案，所述喷嘴线圈位于所述磁性部的外围，所述阀针部设有阀针，所述阀座体设有与所述阀针相配合的喷射孔。
作为本发明进一步改进的技术方案，所述阀针部能够在所述喷嘴线圈的磁性力作用下克服所述弹簧的弹性力来回移动，所述阀针的外围与所述阀座体之间形成有集流腔，所述旋流槽的一端与所述集流腔连通，所述旋流槽的另一端在所述阀针打开时与所述喷射孔连通。
作为本发明进一步改进的技术方案，所述旋流板是由冲压、铸造、机加工、蚀刻中的一种或者多种方法而制成的。
本发明还揭示了如下技术方案：
一种尾气后处理系统，包括尾气后处理的喷射系统以及尾气后处理的封装系统，其中所述喷射系统包括前述的集成装置，所述封装系统包括位于所述集成装置下游的载体。
作为本发明进一步改进的技术方案，所述载体包括选择性催化还原，所述封装系统还包括位于所述集成装置与所述载体之间的至少一个混合器。
本发明还揭示了如下技术方案：
一种集成装置的控制方法，所述集成装置为前述的集成装置，所述控制方法包括：
驱动所述泵运转，通过所述入口通道将所述流体介质吸入所述泵；
经过所述泵的加压之后，通过所述出口通道将该流体介质输送至所述喷嘴；
当达到喷射条件时，给所述喷嘴线圈通电，至少部分打开所述喷嘴以将该流体介质喷入所述发动机的排气中；其中：
所述电机线圈与所述喷嘴线圈分别进行独立控制。
相较于现有技术，本发明泵与喷嘴的集成装置很好的将泵与喷嘴集成在一起，结构简单、紧凑，极大地方便了客户的安装。另外，通过对电机线圈以及喷嘴线圈分别进行独立控制，从而避免了泵与喷嘴之间的相互干扰，提高了控制的精确性。在集成装置集成了尿素泵与尿素喷嘴的基础上，由于控制精度的提高，能够使喷入排气中的尿素的量与氮氧化合物达到合适的比例，降低了因过多喷射尿素而产生的结晶风险。另外，本发明通过设置与所述阀座体分开制造且贴靠在所述阀座体上的旋流板，使得旋流板可以使用各种成熟的加工工艺完成，成本较低。本发明创新性的化繁为简，很好地解决了现有技术中加工工艺比较复杂，质量控制差的难题。
附图说明
图1是本发明的尾气后处理系统应用在处理发动机尾气时的原理图。
图2是图1中集成装置的原理图。
图3是本发明的集成装置在一种实施方式中的立体示意图。
图4是图3另一角度的立体示意图。
图5是图3再一角度的立体示意图。
图6是图3的主视图。
图7是图3的右视图。
图8是图5的仰视图。
图9是图5的俯视图。
图10是本发明集成装置的部分立体分解图，其中泵组件与喷嘴组件分离开来。
图11是图10中泵组件的部分立体分解图，其中罩壳、电机线圈以及防水透气盖被分离出来。
图12是图11中罩壳与电机线圈组装在一起的立体示意图。
图13是图12的立体分解图。
图14是图11进一步的立体分解图，其中控制板被分离出来。
图15是去除图14中的罩壳以及控制板后的立体分解图，其中连接板组件被分离出来。
图16是图15中连接板组件的立体图。
图17是图15中连接板组件的立体分解图。
图18是图15进一步的立体分解图，其中磁性体、弹性体以及螺钉被分离出来。
图19是图18进一步的立体分解图，其中第一密封圈、温度传感器以及压力传感器被分离出来。
图20是图19中磁性体、弹性体以及螺钉等的立体分解图。
图21是图20在组装后沿某一角度的剖面示意图。
图22是图19中压力传感器的立体示意图。
图23是图22另一角度的立体示意图。
图24是图22的立体分解图。
图25是沿图22中C-C线的剖面示意图。
图26是去除图19中的第一密封圈、温度传感器以及压力传感器等后的部分立体分解图，其中第一壳体被分离出来。
图27是图26中第一壳体的立体分解图。
图28是图27于另一角度的立体分解图。
图29是图27中部分第一壳体的立体图。
图30是图29于另一角度的立体图。
图31是图30的俯视图。
图32是沿图31中D-D线的剖面示意图。
图33是沿图31中E-E线的剖面示意图。
图34是沿图31中F-F线的剖面示意图。
图35是图29的俯视图。
图36是沿图35中G-G线的剖面示意图。
图37是沿图35中H-H线的剖面示意图。
图38是沿图35中I-I线的剖面示意图。
图39是去除图26中的第一壳体后的立体图。
图40是图39的部分立体分解图，其中第一齿轮组件与第二齿轮组件被分离出来。
图41是图39的俯视图。
图42是去除图40中的第一齿轮组件与第二齿轮组件之后的立体分解图。
图43是图42中第二壳体的立体示意图。
图44是图43另一角度的立体示意图。
图45是图42中第三壳体组件的立体示意图。
图46是图45的俯视图。
图47是沿图46中J-J线的剖面示意图。
图48是沿图46中K-K线的剖面示意图。
图49是本发明喷嘴组件的部分立体分解图。
图50是图49中尿素喷嘴的部分立体分解图。
图51是图49中喷嘴组件壳体的立体示意图。
图52是图51的部分立体分解图。
图53是图52中部分喷嘴组件壳体的俯视图。
图54是沿图53中L-L线的剖面示意图。
图55是沿图54中M-M线的剖面示意图。
图56是沿图54中N-N线的剖面示意图。
图57是图53另一角度的立体图。
图58是本发明集成装置的立体分解图。
图59是沿图9中A-A线的剖面示意图。
图60是沿图59中O-O线的剖面示意图。
图61是沿图59中P-P线的剖面示意图。
图62是沿图60中Q-Q线的剖面示意图。
图63是沿图61中R-R线的剖面示意图。
图64是沿图9中B-B线的剖面示意图。
图65是沿图64中S-S线的剖面示意图。
图66是图52中的旋流片于另一实施方式的立体分解图。
图67是图66中的旋流板的立体图。
图68是图67中的旋流板的俯视图。
具体实施方式
请参图1所示，本发明揭示了一种尾气后处理系统100，能够应用于处理发动机10的尾气，降低有害物质的排放以满足排放法规的要求。所述尾气后处理系统100包括尾气后处理的喷射系统200以及尾气后处理的封装系统300，其中所述喷射系统200包括用以从尿素箱201中泵送尿素溶液(参箭头X所示)以及向所述发动机10的排气(例如向排气管106或者封装系统300内)中喷射尿素溶液的集成装置1；所述封装系统300包括位于所述集成装置1下游的混合器301以及位于所述混合器301下游的载体302。当然，在某些实施方式中也可以不设置混合器，或者设置两个或者两个以上的混合器。所述载体302可以例如是选择性催化还原(SCR)等。
所述发动机10具有发动机冷却液循环回路。请参图1所示，在本发明图示的实施方式中，所述发动机冷却液循环回路包括第一循环回路101(参粗箭头Y所示)以及第二循环回路102(参细箭头Z所示)，其中所述第一循环回路101用以冷却所述集成装置1，以降低其被高温的发动机排气烧坏的风险；所述第二循环回路102用以加热所述尿素箱201，以实现加热解冻功能。可以理解的是，在第一循环回路101中，所述集成装置1设有供发动机冷却液流入的入口接头103以及供发动机冷却液流出的出口接头104；在第二循环回路102中，其设有控制阀105，以在适宜的条件下打开或者关闭所述控制阀105，实现对第二循环回路102的控制。所述尿素箱201中设有连接在所述第二循环回路102中的加热棒202，以利用发动机冷却液的温度对尿素溶液进行加热解冻。
以下就本发明的集成装置1进行详细描述。
请参图2所示，从原理上看，本发明的集成装置1集成了尿素泵11与尿素喷嘴12的功能。所述尿素泵11包括但不限于齿轮泵、膜片泵、柱塞泵或者叶片泵等。应该理解的是，在此使用的术语“集成”指的是尿素泵11与尿素喷嘴12可以作为单一装置被安装在排气管上；或者尿素泵11与尿素喷嘴12相互靠近并通过较短的连接管道进行连接，在整体上可以被视为一个装置。
另外，为了对尿素泵11以及尿素喷嘴12进行独立控制，本发明的尾气后处理系统100还设 有控制器13。可以理解，所述控制器13可以与所述集成装置1集成在一起或者与所述集成装置1分开设置。请参图2所示，在本发明图示的实施方式中，所述控制器13集成在所述集成装置1内，以实现零件的高度集成化，提高客户端的安装便利性。
所述集成装置1设有用以容纳所述尿素泵11与所述尿素喷嘴12的壳体14。图2所示的实施方式仅是对壳体14的粗略显示。例如，在一种实施方式中，所述壳体14由尿素泵11以及尿素喷嘴12共享；在另一种实施方式中，所述壳体14被区分为与尿素泵11相配合的第一壳体以及与尿素喷嘴12相配合的第二壳体，第一壳体与第二壳体装配在一起，以形成一个整体。所述壳体14设有连接在所述尿素箱201与所述尿素泵11之间的入口通道15以及连接在所述尿素泵11与所述尿素喷嘴12之间的出口通道16。需要说明的是，这里使用的术语“入口通道15”中的“入口”与“出口通道16”中的“出口”是以尿素泵11作为参照，即尿素泵11的上游为入口，尿素泵11的下游为出口。所述出口通道16与所述尿素喷嘴12连通，以向所述尿素喷嘴12泵送尿素溶液。可以理解的是，所述入口通道15位于尿素泵11的上游，为低压通道；所述出口通道16位于尿素泵11的下游，为高压通道。
另外，所述集成装置1设有用以检测温度的温度传感器171。所述温度传感器171可以被设置为与所述入口通道15及/或所述出口通道16连通；或者所述温度传感器171可以被设置为安装在所述集成装置1的任意位置。所述温度传感器171检测到的信号传递给控制器13，控制器13基于该输入信号以及其他信号所设计的控制算法能够提高尿素喷嘴12的喷射精度。所述集成装置1还设有用以检测压力的压力传感器172，所述压力传感器172与所述出口通道16连通，以检测尿素泵11出口的高压通道中的压力。由于本发明的集成设计，内部通道的距离比较短，因此可以认为所述压力传感器172的位置比较靠近所述尿素喷嘴12。这种设计的优点在于压力传感器172所测得的压力比较接近尿素喷嘴12中的压力，提高了数据的精确性，进而提高了尿素喷嘴12的喷射精度。
请参图2所示，所述集成装置1还设有连接在所述出口通道16与所述入口通道15之间的溢流元件173。所述溢流元件173包括但不限于溢流阀、安全阀或者电控阀等。所述溢流元件173的功能是当高压通道中的压力高于设定值时，将所述溢流元件173打开，将位于高压通道中的尿素溶液释放到低压通道中或者直接返回到所述尿素箱201中，以实现压力调节。
为了驱动尿素泵11，所述尿素泵11设有与所述控制器13进行通讯的电机线圈111。为了驱 动尿素喷嘴12，所述尿素喷嘴12设有与所述控制器13进行通讯的喷嘴线圈121。
所述控制器13与所述温度传感器171以及所述压力传感器172进行通讯，以将温度信号以及压力信号传送给所述控制器13。当然，为了能够实现精确控制，所述控制器13还可以接收其他信号，例如来自CAN总线的、与发动机运行参数有关的信号。另外，所述控制器13还可以获得所述尿素泵11的转速，当然，转速信号的采集可以通过相应的转速传感器175(硬件)或者通过控制算法(软件)来实现。所述控制器13分别对所述尿素泵11以及所述尿素喷嘴12进行独立控制。这种控制的优点在于能够降低尿素泵11的动作对尿素喷嘴12的影响，以实现比较高的控制精度。
另外，在某些工况下，由于发动机的排气具有较高的温度，而尿素喷嘴12又是安装在排气管上的，因此需要对所述尿素喷嘴12进行冷却。所述集成装置1为此还设有冷却组件，所述冷却组件通过冷却介质对所述尿素喷嘴12进行冷却。所述冷却介质包括但不限于空气、及/或发动机冷却液、及/或润滑油、及/或尿素等。请参图2所示，本发明图示的实施方式采用水冷，即采用发动机冷却液对尿素喷嘴12进行冷却。壳体14内设有用以供发动机冷却液流通的冷却通道141。
请参图2所示，所述集成装置1的主要工作原理如下：
控制器13驱动尿素泵11运转，位于尿素箱201中尿素溶液通过入口通道15被吸入尿素泵11，经过加压之后，再通过出口通道16输送至尿素喷嘴12。其中，控制器13采集及/或计算需要的信号，例如温度、压力、泵转速等。当达到喷射条件时，控制器13发出控制信号给尿素喷嘴12，例如给喷嘴线圈121通电，通过控制阀针的运动来实现尿素喷射。控制器13发出控制信号给尿素泵11以控制其转速，从而稳定系统的压力。在本发明图示的实施方式中，所述控制器13分别对所述尿素泵11以及所述尿素喷嘴12进行独立控制。
请参图3至图65所示，从结构上看，本发明图示的实施方式中，所述集成装置1包括泵组件18、喷嘴组件19以及控制器13。请参图10所示，所述喷嘴组件19至少部分插入到所述泵组件18中，并通过若干固定螺栓64组装到一起。
请参图3至图10所示，在本发明图示的实施方式中，所述泵组件18包括泵组件壳体180以及与所述泵组件壳体180相配合的尿素泵11。所述泵组件壳体180包括位于顶部的罩壳2以及位于所述罩壳2的下方且堆叠在一起的第一壳体3、第二壳体4以及第三壳体5。在本发明图示的 实施方式中，所述第一壳体3、第二壳体4以及第三壳体5均由金属材料制成。
请参图11及图12所示，所述罩壳2包括用以遮盖所述控制器13以及至少部分泵组件18的罩壳腔体21、与所述罩壳腔体21连通的通孔22、位于周边的若干第一安装孔23以及固定在所述通孔22中的防水透气盖24。所述控制器13上安装有芯片以及其他电子元器件，它们在工作时会发热，导致其周围的空气膨胀，本发明通过设置防水透气盖24很好地解决了因空气膨胀而压坏芯片及/或电子元器件的问题，同时也能起到防水的功效。另外，所述防水透气盖24能够改善控制器13所处的环境，使其能够满足工作条件。在本发明图示的实施方式中，为了提高散热性能，所述罩壳2是由散热效果较好的金属材料制成。另外，所述罩壳2还可以设有位于外部的若干散热片(未图示)，以增强散热效果。
请参图11以及图14所示，所述控制器13包括控制板131以及焊接在所述控制板131上的排线插头132。所述排线插头132穿过所述罩壳2以暴露在外面，用以与外部电路相连接。在本发明图示的实施方式中，所述控制板131呈环状，其设有位于中部的中心孔135。所述泵组件18还设有安装在所述第一壳体3上且用以支撑所述控制板131的若干支撑柱631。
请参图11以及图14至图19所示，所述泵组件壳体180还设有位于所述罩壳2与所述第一壳体3之间的连接板组件6。具体地，所述连接板组件6设有板片部61以及固定在所述板片部61上且向上凸起的金属罩62。所述金属罩62向上穿过所述控制板131的中心孔135。请参图11所示，所述控制板131被所述支撑柱631以及所述罩壳2共同夹持，并与所述连接板组件6之间形成间隙，以利于所述控制板131进行更好的散热以及更好的避开干涉。
请参图16所示，所述板片部61设有贯穿其上、下表面的贯穿孔614、第一穿线孔618以及贯通孔615。请参图14所示，压力传感器172至少部分穿过贯穿孔614，温度传感器171至少部分穿过贯通孔615。压力传感器172的导电线1721穿过贯穿孔614、喷嘴组件19的导电线124穿过第一穿线孔618、温度传感器171的导电线1711穿过贯通孔615，并均电性连接到所述控制板131上。此外，请参图15所示，所述板片部61设有供螺钉133穿过的若干安装孔611。请参图17所示，板片部61设有对应所述金属罩62的穿孔617。在本发明图示的实施方式中，所述金属罩62的下端焊接在所述穿孔617的内壁上。
在本发明图示的实施方式中，所述尿素泵11为齿轮泵，其包括电机线圈111、所述金属罩62、位于所述金属罩62内的弹性体71与磁性体72、位于所述金属罩62下方的第一密封圈73、 以及相互啮合的第一齿轮组件74与第二齿轮组件75。由于齿轮泵能够建立比较大的工作压力，因此有利于提高尿素喷嘴12的流量。另外，齿轮泵还能够反转，利于抽空残留的尿素溶液，降低尿素结晶的风险。请参图12及图13所示，所述电机线圈111设有支架112以及缠绕在所述支架112上的线圈113。所述支架112设有收容所述金属罩62的孔114。在本发明图示的实施方式中，所述电机线圈111被过盈配合在所述罩壳腔体21内，如此设置，可以在不使用额外固定元件(例如螺钉等)的情况下，将电机线圈111与罩壳腔体21形成一个整体，从而减小了零件的数量。另外，请参图20及图21所示，所述尿素泵11还包括收容所述磁性体72的外套筒723，所述外套筒723直接容纳在所述金属罩62内。
请参图59所示，所述电机线圈111套接在所述金属罩62的外围。所述板片部61向下压住所述第一密封圈73以实现密封。在本发明图示的实施方式中，弹性体71位于磁性体72的下端，弹性体71与磁性体72共同被一个金属骨架720所支撑，例如磁性体72与弹性体71分别套接在金属骨架720的上、下两端。金属骨架720设有位于弹性体71与磁性体72之间的分隔板721。除分隔板721之外，金属骨架720整体上呈中空的筒状，所述第一齿轮组件74至少部分收容在所述金属骨架720中(参图59所示)。为了更好地限位所述弹性体71，所述金属骨架720的末端设有与所述弹性体71相抵压的勾部724。所述勾部724设有易于将所述弹性体71套接到所述金属骨架720上的导引锥面725。所述弹性体71设有径向延伸的装配孔711，所述金属骨架720设有对应于所述装配孔711的固定孔726，第一齿轮组件74的上端通过安装在装配孔711以及固定孔726中的螺钉722与所述金属骨架720实现径向固定。如此设置，可以防止第一齿轮组件74的轴向窜动，提高齿轮泵运行的平稳性。众所周知，尿素溶液在结冰之后，体积会发生膨胀。本发明通过设置弹性体71，弹性体71能够被压缩以吸收该膨胀的体积，从而避免因体积膨胀而破坏其他元件。
请参图22至图25所示，在本发明图示的实施方式中，所述压力传感器172包括基板176、固定于所述基板176上的电路板177、与所述电路板177连接的导电线1721以及扣持于所述电路板177上的保护盖178。其中，所述基板176设有板体部1761以及自所述板体部1761向下延伸的凸起部1762，所述凸起部1762上安装有密封圈1722。所述凸起部1762设有向下贯穿的通孔1763，且所述通孔1763向上贯穿所述板体部1761以及电路板177。所述电路板177在对应所述通孔1763的位置处设有芯片1771。所述保护盖178安装在所述芯片1771的外围，以保护所述芯 片1771。在本发明图示的实施方式中，所述保护盖178呈长方体状，并且所述保护盖178设有与所述芯片1771连通的孔1781。请参图25及图59所示，不同于现有技术中的压力传感器，本发明中的压力传感器172不具备单独的封装壳体，而是巧妙地借用罩壳2作为其封装壳体。如此设置，可以减小体积、便于安装、降低成本等。在发明图示的实施方式中，所述压力传感器172是差压传感器，其通过芯片1771上下两端的差压变化转变成电信号。鉴于差压传感器的工作原理是本领域技术人员所熟知的技术，在此不再赘述。
请参图26至图48所示，在本发明图示的实施方式中，所述第一壳体3、第二壳体4以及第三壳体5是机加工件，并通过螺栓66自上而下固定在一起。所述第一壳体3包括第一上表面31、第一下表面32以及第一侧面33，其中所述第一上表面31设有第一环形槽311以及被所述第一环形槽311包围的第一岛部312。所述第一环形槽311用以收容所述第一密封圈73。所述第一下表面32设有第二环形槽325以及被所述第二环形槽325包围的第二岛部326。所述第二环形槽325用以收容第二密封圈731(如图64所示)。
所述第一岛部312设有贯穿所述第一上表面31与所述第一下表面32的第一定位孔3121、贯穿所述第一下表面32的第二定位孔3122、贯穿所述第一上表面31且与所述入口通道15连通的第一连接孔3123、以及贯穿所述第一上表面31且与所述第二定位孔3122连通的第一导流槽3124。请参图27、图28以及图59所示，所述尿素泵11设有收容在所述第一定位孔3121内的第一轴套76以及收容在所述第二定位孔3122内的第二轴套77。另外，所述第一壳体3还包括对应于所述螺钉133的内螺纹孔317。组装时，所述螺钉133在穿过板片部61的安装孔611之后被拧紧在所述内螺纹孔317中，以对所述连接板组件6进行固定。所述第一壳体3还包括供螺栓66穿过的若干第一组装孔318，所述第一组装孔318贯穿所述第一上表面31与所述第一下表面32。所述第一上表面31还设有位于所述第一岛部312旁侧且用以收容压力传感器172的压力传感器收容孔313以及用以收容温度传感器171的温度传感器收容孔314。请参图59所示，所述压力传感器172上的密封圈1722与所述压力传感器收容孔313的内壁实现密封。所述压力传感器172被所述板片部61压住，以实现固定。另外，所述第一壳体3还设有向外凸出的安装凸缘315，所述安装凸缘315设有对应于所述第一安装孔23的第二安装孔316。组装时，将螺栓63依次穿过第二安装孔316与支撑柱631，并紧固在第一安装孔23的内螺纹中。如此设置，能够将第一壳体3与罩壳2实现固定，并夹紧控制板131(参图59所示)。
另外，请参图30所示，所述第一壳体3设有贯穿所述第一侧面33以与尿素接头331连接的进液通道332。所述第一壳体3设有贯穿所述第一下表面32且与所述进液通道332连通的第二连接孔3127。第一连接孔3123与第二连接孔3127均垂直于进液通道332。所述第一定位孔3121、第二定位孔3122、第二连接孔3127均向下贯穿第二岛部326。所述第二岛部326还设有贯穿所述第一下表面32的出口孔3126。所述第一下表面32设有连通所述第一定位孔3121与所述第二定位孔3122的第一泄荷槽321，以确保压力平衡。所述第一泄荷槽321位于第二岛部326上。另外，所述第一壳体3还设有向下贯穿所述第一下表面32的收容腔322，用以收容至少部分的所述喷嘴组件19。请参图33、图34以及图36所示，所述收容腔322与所述压力传感器收容孔313连通。同时，所述收容腔322也与出口孔3126连通。请参图32以及图33所示，在本发明图示的实施方式中，出口孔3126在所述第一壳体3的内部是倾斜的，大致呈倒V形。所述第一壳体3设有对应所述第一穿线孔618的第二穿线孔323。
另外，请参图38、图64以及图65所示，所述第一壳体3还设有与进液通道332以及收容腔322连通的溢流元件收容槽319。所述溢流元件收容槽319向外贯穿第一侧面33，以收容所述溢流元件173。所述溢流元件173在本发明图示的实施方式中为安全阀，其目的是通过泄压的方式以确保所述集成装置1中高压通道中的压力处于安全值范围内。为了固定所述溢流元件173，所述第一壳体3设有固定所述溢流元件173的塞子5122。请参图65所示，所述溢流元件173设有始终连通所述入口通道15与所述出口通道16的涓流孔1731。如此设置，一方面能够降低系统的压力波动，尤其是在喷嘴组件19正在喷射尿素时；另一方面也能够使尿素溶液保持流动，从而利于电机线圈111等的散热。
请参图1所示，所述尿素接头331通过尿素连接管333与所述尿素箱201连通。为了更好的实现加热解冻功能，所述尾气后处理系统100还可以设有对所述尿素连接管333进行加热的加热装置334。请参图22及图29所示，在本发明图示的实施方式中，所述进液通道332水平延伸入所述第一壳体3的内部。当然，在其他实施方式中，所述进液通道332也可以呈一定的角度。
请参图39至图41所示，所述第一齿轮组件74包括第一齿轮轴741以及固定在第一齿轮轴741上的第一齿轮742；所述第二齿轮组件75包括第二齿轮轴751以及固定在第二齿轮轴751上的第二齿轮752，所述第一齿轮742与所述第二齿轮752相互啮合。请参图34所示，在本发明图示的实施方式中，所述第一齿轮742与所述第二齿轮752外啮合。另外，所述第一齿轮轴741为 主动轴，所述第二齿轮轴751为从动轴，所述第一齿轮轴741高于所述第二齿轮轴751。所述第一齿轮轴741的上端穿过所述第一轴套76，并至少部分固定在金属骨架720中。所述第二齿轮轴751的上端定位在所述第二轴套77中。当给电机线圈111通电时，其与磁性体72产生相互作用，电磁力会驱动第一齿轮轴741旋转，并由此带动第一齿轮742以及第二齿轮752旋转。
所述第二壳体4位于所述第一壳体3的下方且与第一壳体3相连接。另外，为了更好的定位，所述第一壳体3与所述第二壳体4之间还设有若干定位销328。所述第二壳体4包括第二上表面41、第二下表面42以及贯穿所述第二上表面41与第二下表面42且用以收容所述第一齿轮742以及第二齿轮752的齿轮槽43。所述齿轮槽43的一侧设有与入口通道15连通的进液腔431，所述齿轮槽43的另一侧设有与所述出口通道16连通的出液腔432。具体地，进液腔431与第二连接孔3127连通，出液腔432的上端与出口孔3126连通。另外，第二壳体4的第二上表面41设有供所述喷嘴组件19穿过的第一容纳孔411，第二下表面42设有定位所述喷嘴组件19的第二容纳孔421，所述第二容纳孔421大于所述第一容纳孔411，以形成阶梯孔。所述喷嘴组件19向上凸出所述第二上表面41并收容在所述收容腔322中。如此设置，高压的尿素溶液能够被输送到尿素喷嘴12。另外，所述第二上表面41还设有对应于第二穿线孔323的第三穿线孔412。第一穿线孔618、第二穿线孔323以及第三穿线孔412相互对齐，用以供喷嘴组件19的导电线124穿过。所述第二壳体4还包括与所述第一组装孔318对齐的若干第二组装孔418。
请参图26、图45至图48所示，所述第三壳体5位于所述第二壳体4的下方且与第二壳体4相连接。所述第三壳体5包括本体部51、自本体部51向下延伸的凸起部52以及自所述本体部51向外延伸的法兰53，其中所述法兰53设有与所述第二组装孔418对齐的若干第三组装孔531，用以供螺栓66穿过。所述本体部51设有第三上表面511，所述第三上表面511设有第三环形槽512以及被所述第三环形槽512包围的第三岛部513。所述第三环形槽512用以收容第三密封圈732(如图64所示)。第三岛部513设有贯穿第三上表面511的第三定位孔5111以及贯穿第三上表面511的第四定位孔5112。所述第三壳体5设有收容于所述第三定位孔5111中的第三轴套78以及收容于所述第四定位孔5112内的第四轴套79。所述第一齿轮轴741的下端定位在第三轴套78中，所述第二齿轮轴751的下端定位在所述第四轴套79中。
另外，所述第三岛部513还设有位于所述第三上表面511的第二导流槽5114以及第三导流槽5115，其中所述第二导流槽5114与第三定位孔5111连通，第三导流槽5115与第四定位孔5112 连通。请参图43所示，所述第二导流槽5114与第三导流槽5115在第三壳体5的内部是倾斜设置的。请参图48所示，出液腔432的下端与第二导流槽5114以及第三导流槽5115均连通。
工作时，尿素溶液自所述尿素连接管333进入进液通道332，一部分尿素溶液自第一连接孔3123进入金属罩62中，另一部分尿素溶液自第二连接孔3127进入进液腔431；其中位于金属罩62中的尿素溶液一方面会直接渗入第一定位孔3121中以润滑第一轴套76，另一方面会沿着第一导流槽3124渗入第二定位孔3122中以润滑第二轴套77。进入进液腔431的尿素溶液又分为两路，其中一路在经过齿轮泵的加压之后进入出口通道16，另一路自第二、第三导流槽5114、5115分别进入第三、第四定位孔5111、5112中以润滑第三、第四轴套78、79，提高齿轮泵转动的平稳性，减小磨损。进入出口通道16中的高压的尿素溶液沿着出口孔3126进入到收容腔322中以流向喷嘴组件19，同时一部分尿素溶液流向溢流元件173。当压力小于溢流元件173的设定值时，溢流元件173关闭，只通过涓流孔1731进行连通；而当压力大于溢流元件173的设定值时，溢流元件173打开，部分尿素溶液进入进液通道332中，以实现泄压。
可以理解，在本发明图示的实施方式中，入口通道15包括进液通道332、第二连接孔3127以及进液腔431。因为所述入口通道15位于尿素泵11的上游，所以被称之为低压通道。所述出口通道16包括出液腔432、出口孔3126、收容腔322等。因为所述出口通道16位于尿素泵11的下游，所以被称之为高压通道。
请参图49至图58所示，所述喷嘴组件19包括喷嘴组件壳体190以及与所述喷嘴组件壳体190相配合的尿素喷嘴12。
所述喷嘴组件壳体190包括主体部91、自主体部91向下延伸的延伸部92以及自所述主体部91向外延伸的安装法兰93。所述安装法兰93设有将所述集成装置1安装到排气管106或者封装系统300上的若干安装孔931。所述主体部91设有第四上表面911以及第四侧面912。所述第四上表面911设有收容所述尿素喷嘴12的容纳腔94以及收容凸起部52的凹槽95。请参图55所示，所述容纳腔94向下延伸入所述延伸部92内。所述主体部91还设有向上凸伸入容纳腔94中的筒状部917，以支撑所述尿素喷嘴12。
所述喷嘴组件壳体190还设有用以冷却所述尿素喷嘴12的所述冷却组件。在本发明图示的实施方式中，所述冷却组件为水冷组件。位于喷嘴组件壳体190内的冷却通道141包括贯穿所述第四侧面912的第一冷却通道913以及与所述第一冷却通道913间隔设置的第二冷却通道914。 其中，所述第一冷却通道913与所述入口接头103连通，所述第二冷却通道914与所述出口接头104连通。所述喷嘴组件壳体190设有密封在延伸部92外围的端盖96。在本发明图示的实施方式中，所述端盖96焊接在延伸部92上。如此设置，所述喷嘴组件壳体190在端盖96与延伸部92之间形成了连通第一冷却通道914与第二冷却通道915的环形冷却槽916。
在本发明图示的实施方式中，所述安装法兰93与主体部91一体机加工形成。当然，在其他实施方式中，所述安装法兰93也可以与所述主体部91分开制作，然后焊接在一起。
请参图50所示，在本发明图示的实施方式中，所述尿素喷嘴12包括喷嘴线圈121、与所述喷嘴线圈121相互作用的磁性部81、位于所述磁性部81下方的阀针部82、作用在所述磁性部81与所述阀针部82之间的弹簧83以及与所述阀针部82配合的阀座84(参图5所示)。所述喷嘴线圈121缠绕在所述磁性部81的外围。所述尿素喷嘴12还包括套接在所述喷嘴线圈121外围的套筒部122。所述弹簧83安装在所述磁性部81与所述阀针部82内。所述阀针部82设有锥形部821以及自所述锥形部821向下延伸的阀针822。请参图52所示，所述阀座84包括焊接在所述延伸部92上的旋流片85。所述旋流片85设有与所述阀针822相配合的喷射孔851以及与所述喷射孔851连通的若干旋流槽852。请参图10、图50及图59所示，所述磁性部81的上端套接有第四密封圈812以与所述收容腔322的内壁实现密封，所述磁性部81的下端套接有第五密封圈813以与所述容纳腔94的内壁实现密封。请参图59所示，所述筒状部917支撑所述阀针部82，使所述阀针部82与所述喷嘴线圈121能够在阀针822的移动方向上形成较多的重叠，加大喷嘴线圈121所产生的电磁力对阀针部82的影响，从而减小驱动电流，降低尿素喷嘴12的功耗，减少发热量。另外，所述容纳腔94中还设有与尿素喷嘴12相配合以调整磁性部81与阀针部82之间的间隙的垫片86。可以理解，阀针部82的行程与上述间隙有密切关系，通过采用不同厚度的垫片86对上述间隙进行调整，能够精确控制阀针部82的行程，以提高尿素喷嘴12的精度。
请参图59所示，所述延伸部92设有集流腔921，所述阀针822延伸入所述集流腔921中。所述磁性部81设有与所述收容腔322连通的第一连通孔811，所述阀针部82设有与所述第一连通孔811连通的第二连通孔823，所述锥形部821设有将所述第二连通孔823与所述集流腔921连通的第三连通孔824。所述旋流槽852与所述集流腔921连通。所述套筒部122的下部收容在所述容纳腔94中，所述套筒部122凸出第四上表面911的部分收容在所述收容腔322中。所述环形冷却槽916位于所述集流腔921的外围。
请参图66至图68所示，所述旋流片85是分体式的，其包括与所述阀针部82配合的阀座体8512以及与所述阀座体8512分开制造且贴靠在所述阀座体8512上的旋流板8511。所述旋流板8511设有若干旋流槽852。所述阀座体8512设有与所述阀针822相配合的喷射孔851。所述阀针部82能够在所述喷嘴线圈121的磁性力作用下克服所述弹簧83的弹性力来回移动，所述阀针822的外围与所述阀座体8512之间形成有集流腔921，所述旋流槽852的一端与所述集流腔921连通，所述旋流槽852的另一端在所述阀针822打开时与所述喷射孔851连通。
所述旋流板8511是由冲压、铸造、机加工、蚀刻中的一种或者多种方法而制成的，以提高喷射精度。可以理解，旋流槽852的形式并不局限于本发明图示的实施方式，凡是能够使尿素形成旋流的其他任何形式(例如螺旋线等)都是可行的。本发明通过设置与所述阀座体8512分开制造且贴靠在所述阀座体8512上的旋流板8511，使得旋流板8511本身可以通过各种成熟的加工工艺完成，成本较低。本发明创新性地对现有技术中的旋盘化繁为简，很好地解决了现有技术中加工工艺比较复杂，生产效率低，质量控制差等难题。
可以理解，在本发明的其他实施方式中，例如集成装置应用于向发动机的排气中喷射燃料，以实现下游的柴油颗粒过滤器(DPF)的再生。在这种应用下，所述尿素泵11可以被替换为燃料泵，所述尿素喷嘴12可以被替换为燃料喷嘴，所述尿素溶液可以被替换为燃料。这种变化对所属技术领域的技术人员是能够理解的，在此不再赘述。
为了便于理解本发明，尿素泵与燃料泵统称为泵，尿素喷嘴与燃料喷嘴统称为喷嘴，尿素溶液与燃料统称为流体介质。
相较于现有技术，本发明的集成装置1是一种集成化的设计，可以省去或缩短现有技术中用以连接泵与喷嘴的尿素管，也可以省去现有技术的泵供给单元中各种传感器与线束之间的插接件，也可以无需加热解冻装置，因此可靠性较高。本发明的集成装置1结构紧凑，体积小，便于各种车型的安装。另外，本发明的集成装置1中内部流体介质通道较短，压降小，泵与喷嘴之间的死容积小，效率较高。温度传感器171与压力传感器172离喷嘴近，喷射压力精度高。另外，通过分别对泵以及喷嘴进行独立控制，避免了喷嘴的动作是由泵的动作所驱动，从而提高了控制的精确度。由于喷嘴的喷射精度提高了，从而能够使喷入排气中的尿素的量与氮氧化合物达到合适的比例，降低了因过多喷射尿素而产生的结晶风险。本发明的集成装置1可以采用水冷，使残留在集成装置1中的尿素温度达不到结晶点，不易产生结晶。
以上实施例仅用于说明本发明而并非限制本发明所描述的技术方案，对本说明书的理解应该以所属技术领域的技术人员为基础，尽管本说明书参照上述的实施例对本发明已进行了详细的说明，但是，本领域的普通技术人员应当理解，所属技术领域的技术人员仍然可以对本发明进行修改或者等同替换，而一切不脱离本发明的精神和范围的技术方案及其改进，均应涵盖在本发明的权利要求范围内。

Claims (10)

  1. 一种泵与喷嘴的集成装置，其中所述泵用以向所述喷嘴泵送流体介质，所述喷嘴用以向发动机的排气中喷射该流体介质，其特征在于：所述集成装置包括泵组件以及喷嘴组件；所述泵组件包括泵组件壳体以及与所述泵组件壳体相配合的所述泵，所述泵组件壳体包括位于所述泵的上游且与所述泵连通的入口通道以及位于所述泵的下游且与所述泵连通的出口通道，所述出口通道与所述喷嘴组件连通，所述泵组件壳体包括第一壳体，所述入口通道位于所述第一壳体内；所述泵组件包括用以驱动所述泵的电机线圈、与所述电机线圈相互作用的磁性体以及相互啮合的第一齿轮组件与第二齿轮组件，其中所述第一齿轮组件包括第一齿轮轴以及第一齿轮，所述第二齿轮组件包括第二齿轮轴以及第二齿轮，所述第一齿轮与所述第二齿轮相互啮合；所述泵组件壳体设有收容所述第一齿轮与所述第二齿轮的齿轮槽，所述齿轮槽的一侧设有与所述入口通道连通的进液腔，所述齿轮槽的另一侧设有与所述出口通道连通的出液腔；所述喷嘴组件包括用以驱动所述喷嘴的喷嘴线圈、与所述喷嘴线圈相配合的磁性部、与所述喷嘴线圈相配合的阀针部、位于所述磁性部与所述阀针部之间的弹簧、与所述阀针部配合的阀座体以及与所述阀座体分开制造且贴靠在所述阀座体上的旋流板，所述旋流板设有旋流槽。
  2. 如权利要求1所述的集成装置，其特征在于：所述泵为尿素泵，所述喷嘴为尿素喷嘴，所述流体介质为尿素溶液。
  3. 如权利要求2所述的集成装置，其特征在于：所述集成装置包括与所述电机线圈以及所述喷嘴线圈连接的控制器，所述控制器分别对所述尿素泵以及所述尿素喷嘴进行独立控制。
  4. 如权利要求2所述的集成装置，其特征在于：所述集成装置包括连接在所述出口通道与所述入口通道之间的溢流元件。
  5. 如权利要求2所述的集成装置，其特征在于：所述喷嘴线圈位于所述磁性部的外围，所述阀针部设有阀针，所述阀座体设有与所述阀针相配合的喷射孔。
  6. 如权利要求5所述的集成装置，其特征在于：所述阀针部能够在所述喷嘴线圈的磁性力作用下克服所述弹簧的弹性力来回移动，所述阀针的外围与所述阀座体之间形成有集流腔，所述旋流槽的一端与所述集流腔连通，所述旋流槽的另一端在所述阀针打开时与所述喷射孔连通。
  7. 如权利要求1所述的集成装置，其特征在于：所述旋流板是由冲压、铸造、机加工、蚀刻中的一种或者多种方法而制成的。
  8. 一种尾气后处理系统，包括尾气后处理的喷射系统以及尾气后处理的封装系统，其中所述喷射系统包括如权利要求1至7项中任意一项所述的集成装置，所述封装系统包括位于所述集成装置下游的载体。
  9. 如权利要求8所述的尾气后处理系统，其特征在于：所述载体包括选择性催化还原，所述封装系统还包括位于所述集成装置与所述载体之间的至少一个混合器。
  10. 一种集成装置的控制方法，其特征在于：所述集成装置为权利要求1至7项中任意一项所述的集成装置，所述控制方法包括：
    驱动所述泵运转，通过所述入口通道将所述流体介质吸入所述泵；
    经过所述泵的加压之后，通过所述出口通道将该流体介质输送至所述喷嘴；
    当达到喷射条件时，给所述喷嘴线圈通电，至少部分打开所述喷嘴以将该流体介质喷入所述发动机的排气中；其中：
    所述电机线圈与所述喷嘴线圈分别进行独立控制。
PCT/CN2017/086987 2016-06-06 2017-06-02 集成装置、尾气后处理系统以及控制方法 WO2017211233A1 (zh)

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