CN111963280A - Integrated urea injection device - Google Patents
Integrated urea injection device Download PDFInfo
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- CN111963280A CN111963280A CN202010758939.XA CN202010758939A CN111963280A CN 111963280 A CN111963280 A CN 111963280A CN 202010758939 A CN202010758939 A CN 202010758939A CN 111963280 A CN111963280 A CN 111963280A
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- urea
- integrated
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- assembly
- sensor
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- 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]
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- 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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
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- 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
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- 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
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
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- 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
- F01N2610/144—Control thereof
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- 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
- F01N2610/1486—Means to prevent the substance from freezing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention belongs to the technical field of engine tail gas aftertreatment, and particularly relates to an integrated urea injection device which comprises a urea pump assembly, a sensor assembly and a urea tank, wherein one end of the sensor assembly is arranged at the bottom of the urea pump assembly, the other end of the sensor assembly is arranged in the urea tank, the bottom of the urea pump assembly is arranged on the outer wall of the urea tank, and a metering injection pump integrated in the urea pump assembly is communicated with the inner cavity of the urea tank. The urea injection device adopts a highly integrated structure, integrates the parts of the traditional urea injection device on one part, does not need an auxiliary mounting bracket, a liquid pipeline and a sensor circuit, has compact structure and small occupied space, reduces the matching difficulty of the whole vehicle, simplifies the pipeline and reduces leakage faults.
Description
Technical Field
The invention belongs to the technical field of engine tail gas aftertreatment, and particularly relates to an integrated urea injection device.
Background
As emission regulations and oil consumption regulations of engines become stricter, structural requirements of the engines become more compact. The SCR urea injection system is also called as an SCR aftertreatment system, is a system for reducing NOX in exhaust gas of a diesel engine by SCR technology, and mainly comprises an electronic control unit, a urea dosage unit, a catalytic reaction unit and the like. As shown in fig. 3, in the SCR injection system, a bluing tank, a metering injection pump, a compressed air filter, and an antifreeze electromagnetic valve are dispersedly fixed in a limited space of an automobile chassis, and various pipelines are required for connection, so that the SCR injection system occupies a large volume, and is difficult to arrange.
Therefore, people develop more integrated SCR systems, which adopt reasonable space arrangement and shorter pipeline connection to reduce the space occupancy rate, for example, the integrated SCR injection system disclosed in chinese patent CN203614177U adopts an integrated bracket installation method, where the integrated bracket is provided with an installation part for installing the metering injection pump, the air filter and the electromagnetic valve for controlling the antifreeze solution, and the bluing tank is connected with the metering injection pump, the air filter and the electromagnetic valve for controlling the antifreeze solution through corresponding pipelines.
Although the integrated SCR injection system has reasonable part layout, compact structure and small occupied space, the length of a connecting pipeline is effectively shortened; still have some problems, the installation and integrated mode of urea pump and urea tank need to increase the connecting line, the integrated support of design not only increases the cost, the inner space of the integrated support is limited to bring about the difficulty in installing and arranging and disassembling the maintenance at the same time, in addition still pipeline is not smooth and arrange unreasonablely and cause the urea injection system to work abnormally, etc. the interface of the pipeline is easy to reveal too in addition, the failure rate is higher; the arrangement relation is complex, and the arrangement requirement of the matching application of the whole vehicle is high due to the large number of connecting parts.
Disclosure of Invention
The invention provides an integrated urea injection device, which adopts a highly integrated structure, integrates the parts of the traditional urea injection device on one part, does not need an auxiliary mounting bracket, a liquid pipeline and a sensor circuit, has compact structure and small occupied space, reduces the matching difficulty of the whole vehicle, simplifies the pipeline and reduces leakage faults.
The technical scheme of the invention is as follows: the utility model provides an integrated form urea injection apparatus, includes urea pump assembly, sensor assembly and urea jar, the one end setting of sensor assembly is in the bottom of urea pump assembly, the other end setting of sensor assembly is in inside the urea jar, the bottom of urea pump assembly sets up on the outer wall of urea jar, integrated in the urea pump assembly and with the measurement jet pump of urea jar inner chamber intercommunication.
The urea pump assembly is internally integrated with an electrical interface, the electrical interface is connected with a urea injection Control Unit, the urea injection Control Unit is a missing Control Unit (DCU), the state of a vehicle is known in real time through a sensor, and the work of each actuator in a urea injection system is accurately controlled through software calculation in real time, so that the accurate Control of each system of the vehicle is realized. The urea pump assembly is internally provided with a control circuit of the metering injection pump and the sensor assembly, and the electrical interface electrically connects the urea pump assembly and the sensor assembly with a urea injection control unit.
The urea injection device adopts a highly integrated structure, the parts of the urea pump assembly and the parts of the sensor assembly are respectively integrated, and then the urea pump assembly and the sensor assembly are integrated and installed, so that all parts of the traditional urea injection device are integrated and arranged on the wall surface of the urea tank, the sensor in the sensor assembly is completely sealed, the damage risk caused by the exposure of the sensor and a connecting wire is avoided, and the working safety of the SCR system is improved.
In addition, auxiliary mounting brackets, and pipelines and circuits which are arranged in an exposed mode outside are not needed, the structure is compact, the occupied space is small, the matching difficulty of the whole vehicle is reduced, and the leakage risk of pipeline connection is reduced.
Preferably, the urea pump assembly with the sensor assembly passes through the buckle and connects, be equipped with the bayonet socket on the urea pump assembly and be connected with the draw-in groove on the urea jar outer wall, simple structure, installation and dismantlement are convenient, easy to maintain, and are with low costs.
Preferably, urea pump assembly and sensor assembly all set up the top of urea jar, simple structure reduces and reveals, is convenient for the installation of sensor assembly.
Preferably, a urea filter element, an antifreeze filter element and a cooling water electromagnetic valve are integrated in the urea pump assembly, the urea filter element is connected with the metering injection pump in series, the antifreeze filter element and the cooling water electromagnetic valve are connected in series in a urea cooling system, an antifreeze interface is arranged at the top of the urea tank, and the antifreeze electromagnetic valve is arranged to ensure the urea solution in the urea tank to normally melt ice; the integration level is higher, and the structure is compacter, guarantees that the pipeline of urea solution in the urea jar is unobstructed.
Preferably, the integrated sensor of sensor assembly includes level sensor, temperature sensor and urea quality sensor, adopts trinity integrated mode, compact structure, level sensor can highly monitor the liquid of urea jar inside, temperature sensor monitors with control temperature to the temperature of urea, and urea quality sensor detects the concentration of urea aqueous solution, guarantees SCR system's normal operating.
The invention has the following beneficial effects:
1. the high-integration structure is adopted, the parts of the traditional urea injection device are integrated on one part, an auxiliary mounting bracket is not needed, the structure is compact, the occupied space is small, the space utilization rate of the whole vehicle is improved, and the matching difficulty of the whole vehicle is reduced.
2. The pipeline and the circuit which are arranged between the parts in an exposed mode are omitted, the damage risk of the pipeline and the circuit which are arranged in an exposed mode is reduced, the leakage risk of the connecting joint is reduced, and the working safety of the SCR system is improved.
3. The clamping connection structure is adopted, the structure is simple, the cost is low, and the disassembly and the maintenance are convenient and quick.
Drawings
Fig. 1 is a schematic diagram of an exploded structure of an integrated urea injection device according to the present invention.
Fig. 2 is a schematic view of the mounting structure of the present invention.
Fig. 3 is a schematic diagram showing a structure of a urea injection device in the prior art.
In the figure: 100-a urea pump assembly, 101-a urea filter element, 102-an antifreeze filter element, 103-a cooling water electromagnetic valve, 104-an electrical interface, 200-a sensor assembly, 300-a urea tank, 301-a clamping groove and 400-a buckle.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example 1:
as shown in fig. 1 and 2, an integrated urea injection device includes a urea pump assembly 100, a sensor assembly 200 and a urea tank 300, wherein one end of the sensor assembly 200 is disposed at the bottom of the urea pump assembly 100, the other end of the sensor assembly 200 is disposed inside the urea tank 300, the bottom of the urea pump assembly 100 is disposed on the outer wall of the urea tank 300, a metering injection pump is integrated in the urea pump assembly 100 and is communicated with the inner cavity of the urea tank 300, an electrical interface 104 is integrated in the urea pump assembly 100, the electrical interface 104 connects the urea pump assembly 100 with a urea injection control unit, and the electrical interface 104 connects the sensor assembly 200 with the urea injection control unit.
The working principle of the embodiment is as follows:
the metering injection pump in the urea pump assembly 100 extracts the urea solution in the urea tank 300, the urea solution is conveyed to the urea nozzle through a channel in the urea pump assembly 100 for injection, the sensor in the sensor assembly 200 measures the parameters of the urea solution, and the data is conveyed to the urea injection control unit through the electric interface 104, so that the work of the metering injection pump can be controlled in real time conveniently.
Example 2:
as shown in fig. 1 and 2, an integrated urea injection device includes a urea pump assembly 100, a sensor assembly 200 and a urea tank 300, wherein one end of the sensor assembly 200 is disposed at the bottom of the urea pump assembly 100, the other end of the sensor assembly 200 is disposed inside the urea tank 300, the bottom of the urea pump assembly 100 is disposed on the outer wall of the urea tank 300, and a metering injection pump is integrated in the urea pump assembly 100 and is communicated with the inner cavity of the urea tank 300. The connecting line of metering jet pump's connecting line and sensor also integrates inside urea pump assembly 100, the installation is accomplished the laminating of urea pump assembly 100 bottom and urea tank 300 bottom, sensor assembly 200 does not expose at all, and integrated the setting is in urea pump assembly 100 with in the urea tank 300.
The urea pump assembly 100 and the sensor assembly 200 are connected into a whole through a buckle 400, the buckle 400 is of a ring-shaped structure, and a bayonet is arranged on the periphery of the buckle 400 on the urea pump assembly 100 and connected with a clamping groove 301 on the outer wall of the urea tank 300.
The urea pump assembly 100 and the sensor assembly 200 are both disposed above the urea tank 300.
Urea filter core 101 is integrated in urea pump assembly 100, urea filter core 101 with the measurement jet pump is established ties, guarantees that the pipeline of urea solution is unobstructed in the urea jar 300.
An anti-freezing solution filter element 102 and a cooling water electromagnetic valve 103 are further integrally arranged in the urea pump assembly 100, and the anti-freezing solution filter element 102 and the cooling water electromagnetic valve 103 are arranged in the urea cooling system in series. The mode that an antifreeze interface is arranged at the top of the urea tank 300 and an antifreeze electromagnetic valve is arranged is adopted, so that the urea solution in the urea tank 300 can be normally iced.
An electrical interface 104 is integrated in the urea pump assembly 100, the electrical interface 104 is connected with a urea injection Control Unit, the urea injection Control Unit is a missing Control Unit, DCU for short, and the status of the vehicle is known in real time through a sensor, and the work of each actuator in the urea injection system is accurately controlled through software calculation in real time, so that the accurate Control of each system of the vehicle is realized. The urea pump assembly 100 is internally provided with control circuits of the metering injection pump and the sensor assembly 200, and the electrical interface 104 electrically connects the urea pump assembly 100 and the sensor assembly 200 to a urea injection control unit.
The working principle of the embodiment is as follows:
the urea solution in the urea tank 300, process the urea nozzle injection is carried to the passageway in the urea pump assembly 100, and the parameter of urea solution is measured to the sensor in the sensor assembly 200, level sensor can monitor the liquid height inside the urea tank 300, temperature sensor monitors the temperature of urea with control temperature, and urea quality sensor detects the concentration of urea aqueous solution, gives urea injection control unit to data transmission, and the normal operating of SCR system is guaranteed to the work of real time control measurement injection pump of being convenient for.
In addition, the antifreeze filter element 102 and the cooling water electromagnetic valve 103 are communicated with a urea cooling system, so that normal deicing and unfreezing treatment of the urea solution in the urea tank 300 is ensured.
During installation, the sensor assembly 200 is connected to the urea pump assembly 100 through the buckle 400, and then the bayonet on the urea pump assembly 100 is connected to the clamping groove 301 on the outer wall of the urea tank 300, so that the whole urea injection device forms a whole without exposed liquid pipelines and control lines, and the urea injection device is compact in structure and small in size.
Claims (6)
1. An integrated urea injection device comprising a urea pump assembly (100), a sensor assembly (200) and a urea tank (300), characterized in that: the one end setting of sensor assembly (200) is in the bottom of urea pump assembly (100), the other end setting of sensor assembly (200) is in inside urea tank (300), the bottom of urea pump assembly (100) sets up on the outer wall of urea tank (300), integrated in urea pump assembly (100) and with the measurement jet pump of urea tank (300) inner chamber intercommunication, integrated in urea pump assembly (100) has electrical interface (104), electrical interface (104) will urea pump assembly (100) with sensor assembly (200) are connected with the urea injection control unit.
2. The integrated urea injection device of claim 1, wherein: the urea pump assembly (100) and the sensor assembly (200) are connected by a snap (400).
3. An integrated urea injection device according to claim 1 or 2, wherein: the urea pump assembly (100) is provided with a bayonet which is connected with a clamping groove (301) on the outer wall of the urea tank (300).
4. An integrated urea injection device according to claim 1 or 2, wherein: the urea pump assembly (100) and the sensor assembly (200) are both disposed above the urea tank (300).
5. An integrated urea injection device according to claim 1 or 2, wherein: urea pump assembly (100) are internal to be integrated with urea filter core (101), antifreeze solution filter core (102) and cooling water solenoid valve (103), urea filter core (101) with the measurement jet pump is established ties, antifreeze solution filter core (102) and cooling water solenoid valve (103) are established ties and are set up in urea cooling system.
6. An integrated urea injection device according to claim 1 or 2, wherein: the sensor assembly (200) integrated sensors include a liquid level sensor, a temperature sensor, and a urea quality sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010758939.XA CN111963280A (en) | 2020-07-31 | 2020-07-31 | Integrated urea injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010758939.XA CN111963280A (en) | 2020-07-31 | 2020-07-31 | Integrated urea injection device |
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| Publication Number | Publication Date |
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| CN111963280A true CN111963280A (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010758939.XA Pending CN111963280A (en) | 2020-07-31 | 2020-07-31 | Integrated urea injection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151175A (en) * | 2021-12-03 | 2022-03-08 | 凯龙高科技股份有限公司 | Pump tank integrated form urea solution feeding device |
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2020
- 2020-07-31 CN CN202010758939.XA patent/CN111963280A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151175A (en) * | 2021-12-03 | 2022-03-08 | 凯龙高科技股份有限公司 | Pump tank integrated form urea solution feeding device |
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