CN111535907A - Urea solution feeding device and vehicle SCR system - Google Patents

Urea solution feeding device and vehicle SCR system Download PDF

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Publication number
CN111535907A
CN111535907A CN202010476346.4A CN202010476346A CN111535907A CN 111535907 A CN111535907 A CN 111535907A CN 202010476346 A CN202010476346 A CN 202010476346A CN 111535907 A CN111535907 A CN 111535907A
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China
Prior art keywords
urea
shell
pump
solution supply
supply apparatus
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Granted
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CN202010476346.4A
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Chinese (zh)
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CN111535907B (en
Inventor
王�锋
刘德文
曾伟
袁书华
臧志成
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Kailong High Technology Co Ltd
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Kailong High Technology Co Ltd
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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]
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1827—Sealings specially adapted for exhaust systems
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • 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
    • 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
    • F01N2610/1426—Filtration means
    • 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
    • F01N2610/1446—Means for damping of pressure fluctuations in the delivery system, e.g. by puffer volumes or throttling
    • 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
    • F01N2610/148—Arrangement of sensors
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention discloses a urea solution supply device and a vehicle SCR system, the urea solution supply device comprises a supply device body, the supply device body comprises a urea box body and a urea supply unit, the urea supply unit is detachably arranged at the bottom of the urea box body, at least part of the urea supply unit is positioned inside the urea box body, the urea supply unit comprises a shell, a urea pump, a controller, a heater and a urea sensor group, the urea pump, the controller, the heater and the urea sensor group are integrally arranged on the shell, a urea flow channel is arranged in the shell, a urea liquid outlet is formed in the shell, the urea liquid outlet is connected with one end of the urea flow channel, the other end of the urea flow channel is connected with an outlet of the urea pump, and an inlet of. The urea supply unit is embedded at the bottom of the urea box body, so that the ground clearance of the bottom of the whole vehicle is increased.

Description

Urea solution feeding device and vehicle SCR system
Technical Field
The invention relates to the technical field of vehicle aftertreatment systems, in particular to a urea solution supply device and a vehicle SCR system.
Background
With the increasing strictness of the emission regulations of the diesel engine, the limit of the nitrogen oxide content of the automobile emission is increased by the upgrading of the national six regulations, the requirements of multifunctional light vehicle types such as SUVs, MPVs and Picards are increased at a high speed, the requirement of the regulations cannot be met by the exhaust gas post-treatment technical route originally applied to the multifunctional vehicle types such as the SUVs with compact structures, and the SCR system (selective catalytic reduction) with highly integrated structures is pushed to be the optimal technical route; the requirements for high integration, miniaturization, convenience in installation and maintenance and the like of all parts of the SCR system of the diesel engine are higher and higher.
At present, urea feed system is mainly connected with the urea sensor of installing on the urea box for an independent urea pump among traditional SCR system through the pipeline, this kind of system spare part dispersion, connecting line is complicated, heat with the cooling water, the part that the dispersion is arranged to certain space and position of urea box in whole car installation arrangement, the pipeline of too much connection has not only increased the risk that urea solution revealed in the use, the cost is increased, and whole car ground clearance also can't be guaranteed, therefore, the urgent need is solved.
Disclosure of Invention
The invention aims to solve the problems that the existing urea solution supply device has dispersed parts and complex connecting pipelines, and a urea box body needs certain space and position to arrange dispersed parts in the installation and arrangement of a whole vehicle, so that the ground clearance of the whole vehicle cannot be ensured.
The purpose of the invention is realized by the following technical scheme:
a urea solution supply device comprises a supply device body, wherein the supply device body comprises a urea box body and a urea supply unit, the urea supply unit is detachably arranged at the bottom of the urea box body, and the urea supply unit is at least partially positioned in the urea box body and comprises a shell, a urea pump, a controller, a heater and a urea sensor group which are integrated on the shell, the urea pump and the heater are controlled by the controller, the controller is electrically connected with the urea sensor group, a urea flow passage is arranged in the shell, and the shell is provided with a urea liquid outlet which is connected with one end of the urea runner, the other end of the urea runner is connected with an outlet of the urea pump, and an inlet of the urea pump is positioned in the urea box body.
As a preferable scheme of the invention, a pressure stabilizing cavity is arranged in the shell between the urea liquid outlet and the urea runner, and an elastic body for stabilizing pressure is arranged in the pressure stabilizing cavity.
As a preferable aspect of the present invention, the urea sensor group includes a urea pressure sensor, a urea level sensor, a urea quality sensor, and a urea temperature sensor.
As a preferable scheme of the present invention, the housing includes an upper housing, a lower housing, and a bottom cover, the upper housing is hermetically connected to the lower housing, and the lower housing is hermetically connected to the bottom cover.
As a preferable scheme of the invention, the shell is provided with a chuck, and the shell is clamped and fixed at the bottom of the urea box body through the chuck.
In a preferred embodiment of the present invention, a portion of the urea supply unit located at an upper end of the chuck is embedded in the urea tank.
In a preferred embodiment of the present invention, a filter assembly is disposed on the housing at an inlet of the urea pump.
In a preferred embodiment of the present invention, the urea pump is a magnetically driven gear pump.
In a preferred embodiment of the present invention, the heater is an electric heater.
An SCR system for a vehicle includes a urea solution supply device as described above.
The urea supply unit is embedded at the bottom of the urea box body, so that the ground clearance of the bottom of the whole vehicle is increased.
Drawings
FIG. 1 is a schematic perspective view of a urea supply unit;
FIG. 2 is a schematic perspective view of another perspective view of the urea supply unit;
FIG. 3 is an exploded view of a urea supply unit;
FIG. 4 is a schematic view of a urea solution supply apparatus.
In the figure:
1. a urea pump; 2. a heater; 3. a chuck; 4. an electrical appliance connector; 5. a urea outlet; 6. a urea pressure sensor; 7. a urea level sensor; 8. an upper shell; 9. a bottom cover; 10. a filter assembly; 11. a lower case; 12. a controller; 13. an elastomer; 14. a first seal ring; 15. a second seal ring; 16. a urea box body; 17. and a urea supply unit.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the embodiments described herein are illustrative only and are not limiting upon the present invention.
Referring to fig. 1 to 4, fig. 1 is a schematic perspective view of a urea supply unit; FIG. 2 is a schematic perspective view of another perspective view of the urea supply unit; FIG. 3 is an exploded view of a urea supply unit; FIG. 4 is a schematic view of a urea solution supply apparatus.
In this embodiment, a urea solution feeding device comprises a feeding device body, the feeding device body comprises a urea box 16 and a urea feeding unit 17, the urea feeding unit 17 comprises a housing, a urea pump 1, a controller 12, a heater 2 and a urea sensor group, the urea pump 1, the controller 12, the heater 2 and the urea sensor group are integrally arranged on the housing, the housing is provided with a chuck 3, the housing is fixed at the bottom of the urea box 16 through the chuck 3 in a clamping manner, the urea feeding unit 17 is arranged at the upper end of the chuck 3, the urea pump 1 and the heater 2 are both controlled by the controller 12, the controller 12 is electrically connected with the urea sensor group, the housing is provided with an electrical connector 4, a urea flow channel is arranged in the housing, and the housing is provided with a urea liquid outlet 5, the urea liquid outlet 5 with the one end of urea runner links to each other, the other end of urea runner with the export of urea pump 1 links to each other, the import of urea pump 1 is located in the urea box 16.
In this embodiment, a pressure stabilizing cavity is arranged in the housing between the urea liquid outlet 5 and the urea runner, and an elastic body 13 for stabilizing pressure is arranged in the pressure stabilizing cavity; the elastic body 13 has a compression deformation characteristic, and in the embodiment, the elastic body 13 is a rubber cushion block which can absorb or release the pressure of the urea solution, so that the stable adjustment of the pressure of the urea solution is realized.
In this embodiment, the urea sensor group includes a urea pressure sensor 6, a urea liquid level sensor 7, a urea quality sensor, and a urea temperature sensor. The urea liquid level sensor 7, the urea quality sensor and the urea temperature sensor collect the liquid level, the concentration and the temperature of the urea solution and feed the liquid level, the concentration and the temperature back to the controller, and the controller 12 analyzes the state of the urea solution in real time and uses the state as the basis of OBD fault diagnosis.
Specifically, in this embodiment, the casing is made of PA66GF30 material, the casing includes an upper casing 8, a lower casing 11 and a bottom cover 9, a first sealing ring 14 is disposed between the upper casing 8 and the lower casing 11 and is connected in a sealing manner, a second sealing ring 15 is disposed between the lower casing 11 and the bottom cover 9 and is connected in a sealing manner, and the casing after the sealing connection forms a sealing space, so that the parts of the urea supply unit 17 are not polluted and corroded by external dust, rainwater and the like.
In this embodiment, a filter assembly 10 is provided on the housing at the inlet of the urea pump 1.
In this embodiment, the urea pump 1 is a magnetically driven gear pump; the mechanical connection is cancelled, so that the urea solution is completely isolated, and the urea solution is prevented from leaking.
In this embodiment, the heater 2 is an electric heater; the urea solution in the urea supply unit 17 and the urea box 16 is heated by the electric heater, so that the low-temperature unfreezing function of the urea solution is realized, the cooling water heating and cooling water valve mechanism of the urea solution in the urea box 16 is omitted, extra installation space and installation supports are not needed, and the production and manufacturing cost and the material cost are saved.
When the urea spraying device works, the controller 12 controls the urea pump 1 to work, urea solution enters through an inlet of the urea pump, flows through the urea liquid outlet 5 through the urea pump 1, and is conveyed to the urea nozzle through a pipeline connected between the urea liquid outlet 5 and the urea nozzle; the urea pressure sensor 6 arranged on the shell detects the pressure of the urea solution in real time and feeds back the signal to the controller 12, and the pressure stabilizing cavity stabilizes the pressure of the urea solution from the urea liquid outlet 5 to the urea nozzle.
Above-mentioned urea solution feeding device is integrated on the casing with the urea pump, has cancelled the connection that urea solution advances the liquid pipeline and urea solution returns the liquid pipeline, and the integration has urea sensor group on the casing, and the casing is located inside the urea box with the assembly after urea sensor group is integrated, occupies smallly for the urea box does not receive the mounted position restriction, and whole car bottom ground clearance is higher.
The embodiment also discloses an SCR system for a vehicle, which comprises the urea solution supply device.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims.

Claims (10)

1. A urea solution supply device, comprising a supply device body, characterized in that: the feeding device body comprises a urea box body and a urea feeding unit, wherein the urea feeding unit can be detachably installed at the bottom of the urea box body, at least part of the urea feeding unit is located inside the urea box body, the urea feeding unit comprises a shell and a urea pump, a controller, a heater and a urea sensor group, the urea pump and the heater are controlled by the controller, the controller is electrically connected with the urea sensor group, a urea flow channel is arranged in the shell, a urea liquid outlet is formed in the shell, the urea liquid outlet is connected with one end of the urea flow channel, the other end of the urea flow channel is connected with an outlet of the urea pump, and an inlet of the urea pump is located in the urea box body.
2. The urea solution supply apparatus according to claim 1, wherein: a pressure stabilizing cavity is arranged in the shell and between the urea liquid outlet and the urea runner, and an elastic body with a pressure stabilizing effect is arranged in the pressure stabilizing cavity.
3. A urea solution supply apparatus according to claim 2, characterized in that: the urea sensor group comprises a urea pressure sensor, a urea liquid level sensor, a urea quality sensor and a urea temperature sensor.
4. A urea solution supply apparatus according to claim 3, characterized in that: the shell comprises an upper shell, a lower shell and a bottom cover, the upper shell is connected with the lower shell in a sealing mode, and the lower shell is connected with the bottom cover in a sealing mode.
5. A urea solution supply apparatus according to any one of claims 1 to 4, characterized in that: install the chuck on the casing, just the casing passes through the chuck joint is fixed in the bottom of urea box.
6. The urea solution supply apparatus according to claim 5, wherein: the urea supply unit is arranged at the upper end of the chuck and is embedded in the urea box.
7. The urea solution supply apparatus according to claim 6, wherein: and a filtering component is arranged at the inlet of the urea pump on the shell.
8. The urea solution supply apparatus according to claim 7, wherein: the urea pump is a magnetic drive gear pump.
9. The urea solution supply apparatus according to claim 8, wherein: the heater is an electric heater.
10. An automotive SCR system, characterized in that: comprising a urea solution supply device according to any one of claims 1-9.
CN202010476346.4A 2020-05-29 2020-05-29 Urea solution supply device and vehicular SCR system Active CN111535907B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101984228A (en) * 2010-10-21 2011-03-09 中国第一汽车集团公司 Mechanical pump type SCR urea spraying system
CN203098002U (en) * 2013-01-31 2013-07-31 中国重汽集团济南动力有限公司 Selective catalytic reduction system for vehicle
CN105019987A (en) * 2015-08-03 2015-11-04 包头北大工道发动机技术有限公司 Vehicle-mounted urea solution metering, atomizing and supplying device
WO2016078538A1 (en) * 2014-11-21 2016-05-26 天纳克（苏州）排放系统有限公司 Common rail assembly, urea injection system and application thereof
WO2018072558A1 (en) * 2016-10-21 2018-04-26 天纳克（苏州）排放系统有限公司 Urea pump module
WO2018072560A1 (en) * 2016-10-21 2018-04-26 天纳克（苏州）排放系统有限公司 Urea pump module
CN208996798U (en) * 2018-09-25 2019-06-18 东风汽车股份有限公司 Integrated urea supply unit assembly
CN110905633A (en) * 2018-09-14 2020-03-24 福爱电子(贵州)有限公司 Urea liquid supply module
CN212376726U (en) * 2020-05-29 2021-01-19 凯龙高科技股份有限公司 Urea solution feeding device and vehicle SCR system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101984228A (en) * 2010-10-21 2011-03-09 中国第一汽车集团公司 Mechanical pump type SCR urea spraying system
CN203098002U (en) * 2013-01-31 2013-07-31 中国重汽集团济南动力有限公司 Selective catalytic reduction system for vehicle
WO2016078538A1 (en) * 2014-11-21 2016-05-26 天纳克（苏州）排放系统有限公司 Common rail assembly, urea injection system and application thereof
CN105019987A (en) * 2015-08-03 2015-11-04 包头北大工道发动机技术有限公司 Vehicle-mounted urea solution metering, atomizing and supplying device
WO2018072558A1 (en) * 2016-10-21 2018-04-26 天纳克（苏州）排放系统有限公司 Urea pump module
WO2018072560A1 (en) * 2016-10-21 2018-04-26 天纳克（苏州）排放系统有限公司 Urea pump module
CN110905633A (en) * 2018-09-14 2020-03-24 福爱电子(贵州)有限公司 Urea liquid supply module
CN208996798U (en) * 2018-09-25 2019-06-18 东风汽车股份有限公司 Integrated urea supply unit assembly
CN212376726U (en) * 2020-05-29 2021-01-19 凯龙高科技股份有限公司 Urea solution feeding device and vehicle SCR system

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