CN109026300A - A kind of SCR system urea pump low temperature defreezing method - Google Patents
A kind of SCR system urea pump low temperature defreezing method Download PDFInfo
- Publication number
- CN109026300A CN109026300A CN201811054155.8A CN201811054155A CN109026300A CN 109026300 A CN109026300 A CN 109026300A CN 201811054155 A CN201811054155 A CN 201811054155A CN 109026300 A CN109026300 A CN 109026300A
- Authority
- CN
- China
- Prior art keywords
- pump
- low temperature
- urea
- coil
- urea pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- F01N9/00—Electrical control of exhaust gas treating 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
Abstract
The invention discloses a kind of SCR system urea pump low temperature defreezing method, the urea pump includes the pump housing, motor, gear pump；It is characterized by: by the power supply of control electrical-coil but rotor is kept not rotate, make to control electrical-coil fever, so that electric machine iron core be made to generate heat, and transfer heat to the pump housing, heating low temperature is carried out to urea pump and is thawed.The present invention carries out heating defrosting using the electrical-coil inside urea pump, is increased without element, need to only be realized by control software.It is used in combination in conjunction with existing two kinds of heating defreezing methods, the present invention will shorten the time that urea pump heats in low temperature, or only be heated by motor, realize the heating defrosting function of urea pump.
Description
Technical field
The invention belongs to SCR system technical fields, more particularly to a kind of SCR system urea pump low temperature defreezing method.
Background technique
The basic functional principle of SCR system is that urea injection unit arranges quantitative aqueous solution of urea with mist form penetrating
In tracheae, urea droplets issue unboiled water solution and pyrolytic reaction in high-temp waste gas effect, produce required reducing agent ammonia, ammonia exists
Nitrogen oxides is selectively reduced to nitrogen under catalyst action.The physical characteristic of urea determines that it will at -11 DEG C
It freezes, so in actual operation, in order to guarantee also to work normally compared with SCR system under low ambient temperature, needing to SCR
System carries out defrosting heating, guarantees that urea can normally circulate.
The heating method of urea pump is broadly divided into two classes in SCR system at present: one kind is typically to utilize engine cold
But the heat of water carries out the structural representation of SCR urea pump heating.As shown by the arrows in Figure 1, when urea pump needs to heat, control hair
The solenoid valve of motivation cooling water opening and closing is opened, and the part for needing to heat inside urea pump is flowed through using the engine cooling water of high temperature
And position, to melt the purpose of the aqueous solution of urea to freeze.To guarantee that the going on smoothly of heating, the structure needs complicated runner
Design, while needing to guarantee the leakproofness of runner.It is another kind of as shown in Fig. 2, utilize electric heating unit 1 fever carry out SCR urea
Pump the structure of heating.In the electric heating unit 1 for the position installation different capacity for needing to heat, when needing to heat defrosting, control electricity
1 heating power of heating unit come reach heating urea pump part, with melt freeze aqueous solution of urea purpose.
Summary of the invention
Present invention aims at defects existing for the method thawed for existing urea pump heating, provide one kind and are increased without
Element need to only realize the method that urea pump heating is thawed by control software.
The present invention to achieve the above object, adopts the following technical scheme that
A kind of SCR system urea pump low temperature defreezing method, the urea pump includes the pump housing, motor, gear pump；Its feature exists
In: by the power supply of control electrical-coil but rotor is kept not rotate, makes to control electrical-coil fever, to make electric machine iron core
Fever, and the pump housing is transferred heat to, heating low temperature is carried out to urea pump and is thawed.
It is further characterized by: it is provided with external heating unit on the pump housing, controls heating unit heating power pair
Urea pump carries out heating low temperature and thaws.
It is further: it is provided with closed runner on the pump housing, flows through the pump housing using the engine cooling water of high temperature,
Heating low temperature is carried out to urea pump to thaw.
Further: the motor is three-phase brushless dc motor, when being heated using electrical-coil, is controlled using PID
Method processed carries out the control of electric current, and phase sequence is connected by change, so that electrical-coil powers but rotor is kept not rotate.
It is provided with temperature sensor on the pump housing, the solution of urea pump is carried out by the measurement temperature of the temperature sensor
Freeze control；It is provided with pressure sensor on the pump housing, for detecting aqueous solution of urea pressure signal；It is provided on the pump housing
And the interface of connection external management.
The motor and gear pump, which are integral, to be bolt-connected on the pump housing；The motor includes coil branch
Frame, electrical-coil, iron core, offline coil support；There is magnetic steel sleeve to keep apart between motor stator and rotor；The electrical-coil heating
When, the electrical-coil heat is transmitted to the pump housing by the iron core, makes the urea water to freeze in the pump housing under low temperature
Solution melts；The magnetic steel sleeve makes described under low temperature by the heat transfer of electrical-coil to the rotor and gear pump simultaneously
The aqueous solution of urea to freeze in gear pump and rotor melts.
The present invention carries out heating defrosting using the electrical-coil inside urea pump, is increased without element, need to only pass through control
Software is realized.It is used in combination in conjunction with existing two kinds of heating defreezing methods, the present invention will shorten the urea pump in low temperature and heat
Time, or only by motor heat, realize the heating defrosting function of urea pump.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the heating of SCR urea pump is carried out using the heat of engine cooling water.
Fig. 2 is to generate heat to carrying out the schematic diagram of the structure of SCR urea pump heating using electric heating unit.
Fig. 3 is urea pump structural schematic diagram of the present invention.
Fig. 4 is urea pump assembling schematic diagram of the present invention.
Fig. 5 is motor and gear pump integral structure schematic diagram.
Fig. 6 is to sequentially turn on corresponding sequence when three-phase brushless dc motor rotates.
Specific embodiment
A kind of SCR system urea pump low temperature defreezing method.As shown in Figure 3,4, the urea pump that the present invention uses includes pump
Body 101, motor 102, gear pump 103；Motor 102 and gear pump 103 are integral to be connected on the pump housing by bolt 201；Electricity
Machine 102 includes online coil support 202, electrical-coil 203, iron core 204, offline coil support 205.As shown in figure 5, motor stator
There is magnetic steel sleeve 302 to keep apart between 301 and rotor 303.It is provided with temperature sensor 105 on the pump housing 101, passes through temperature sensor
105 measurement temperature as the opening and closing of urea pump heating schedule foundation；Pressure sensing is additionally provided on the pump housing 101
Device 104 detects aqueous solution of urea pressure signal；And the interface 106 of connection external management.
When low temperature thaws, by the power supply of control electrical-coil but rotor is kept not rotate, makes to control electrical-coil hair
Heat so that electric machine iron core be made to generate heat, and transfers heat to the pump housing, carries out heating low temperature to urea pump and thaws.Magnetic steel sleeve simultaneously
By the heat transfer of electrical-coil to rotor and gear pump, melt low temperature lower tooth wheel pump with the aqueous solution of urea to freeze in rotor
Change.
Preferred: motor uses three-phase brushless dc motor, when three-phase brushless dc motor normal rotation as shown in fig. 6,
1--6--3-4--2--5 sequentially turns on corresponding sequence, and regular time is connected in each sequence.Added when using electrical-coil
When hot, the control of electric current is carried out using PID control method, and phase sequence is connected by change, commutation is not carried out to it, so that motor lines
Circle powers but rotor is kept not rotate.
Urea pump low temperature defreezing method of the invention can also use simultaneously with existing two kinds of heating thawing mode, shorten
The time that urea pump heats in low temperature.It is provided with external heating unit on the pump housing, controls heating unit heating power pair
Urea pump carries out heating low temperature and thaws.And closed runner is provided on stating the pump housing, utilize the engine cool water flow of high temperature
Through the pump housing, heating low temperature is carried out to urea pump and is thawed.
Claims (6)
1. a kind of SCR system urea pump low temperature defreezing method, the urea pump include the pump housing, motor, gear pump；Its feature exists
In: by the power supply of control electrical-coil but rotor is kept not rotate, makes to control electrical-coil fever, to make electric machine iron core
Fever, and the pump housing is transferred heat to, heating low temperature is carried out to urea pump and is thawed.
2. SCR system as described in claim 1 urea pump low temperature defreezing method, it is characterised in that: be arranged on the pump housing
There is external heating unit, control heating unit heating power carries out heating low temperature to urea pump and thaws.
3. SCR system as claimed in claim 1 or 2 urea pump low temperature defreezing method, it is characterised in that: set on the pump housing
It is equipped with closed runner, flows through the pump housing using the engine cooling water of high temperature, heating low temperature is carried out to urea pump and is thawed.
4. SCR system as claimed in claim 1 or 2 urea pump low temperature defreezing method, it is characterised in that: the motor is three
Phase brushless DC motor when being heated using electrical-coil, the control of electric current is carried out using PID control method, passes through change
Phase sequence is connected, so that electrical-coil powers but rotor is kept not rotate.
5. SCR system as claimed in claim 3 urea pump low temperature defreezing method, it is characterised in that: be arranged on the pump housing
There is temperature sensor, is controlled by the defrosting that the measurement temperature of the temperature sensor carries out urea pump；It is arranged on the pump housing
There is pressure sensor, for detecting aqueous solution of urea pressure signal；Connecing for external management is provided with and connected on the pump housing
Mouthful.
6. SCR system as claimed in claim 3 urea pump low temperature defreezing method, it is characterised in that: the motor and gear
Pump, which is integral, to be bolt-connected on the pump housing；The motor includes online coil support, electrical-coil, iron core, offline
Coil support；There is magnetic steel sleeve to keep apart between motor stator and rotor；When the electrical-coil heats, the electrical-coil heat is logical
It crosses the iron core and is transmitted to the pump housing, melt the aqueous solution of urea to freeze in the pump housing under low temperature；The magnet steel simultaneously
The heat transfer of electrical-coil to the rotor and gear pump, is made the gear pump and the interior urine to freeze of rotor under low temperature by set
Plain aqueous solution melts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054155.8A CN109026300A (en) | 2018-09-11 | 2018-09-11 | A kind of SCR system urea pump low temperature defreezing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054155.8A CN109026300A (en) | 2018-09-11 | 2018-09-11 | A kind of SCR system urea pump low temperature defreezing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109026300A true CN109026300A (en) | 2018-12-18 |
Family
ID=64621242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811054155.8A Pending CN109026300A (en) | 2018-09-11 | 2018-09-11 | A kind of SCR system urea pump low temperature defreezing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026300A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102048A (en) * | 2019-12-17 | 2020-05-05 | 凯龙高科技股份有限公司 | Heating and unfreezing control system and method for urea pump of SCR system |
| CN112032038A (en) * | 2020-09-11 | 2020-12-04 | 衡阳盈德气体有限公司 | Novel internal anti-icing device for piston liquid pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102066761A (en) * | 2008-06-03 | 2011-05-18 | 因勒纪汽车系统研究公司 | Process for starting an SCR system |
| JP2011127442A (en) * | 2009-12-15 | 2011-06-30 | Bosch Corp | Control device and control method for reduction agent injection valve |
| CN103161549A (en) * | 2011-12-15 | 2013-06-19 | 罗伯特·博世有限公司 | Method for heating conveying module in SCR catalyst system |
| CN203515743U (en) * | 2013-10-08 | 2014-04-02 | 潍柴动力股份有限公司 | Urea pump water heating device for aftertreatment of engine tail gas |
| CN203717311U (en) * | 2014-01-27 | 2014-07-16 | 北京大学工学院包头研究院 | Integrated SCR (Selective Catalytic Reduction) system urea pump for vehicle |
| CN207048974U (en) * | 2017-04-18 | 2018-02-27 | 深圳市科睿精密科技有限公司 | Automobile urea spray gears pump |
| CN108425726A (en) * | 2018-03-28 | 2018-08-21 | 吉林大学 | A kind of SCR system heating device and its control method |
-
2018
- 2018-09-11 CN CN201811054155.8A patent/CN109026300A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102066761A (en) * | 2008-06-03 | 2011-05-18 | 因勒纪汽车系统研究公司 | Process for starting an SCR system |
| JP2011127442A (en) * | 2009-12-15 | 2011-06-30 | Bosch Corp | Control device and control method for reduction agent injection valve |
| CN103161549A (en) * | 2011-12-15 | 2013-06-19 | 罗伯特·博世有限公司 | Method for heating conveying module in SCR catalyst system |
| CN203515743U (en) * | 2013-10-08 | 2014-04-02 | 潍柴动力股份有限公司 | Urea pump water heating device for aftertreatment of engine tail gas |
| CN203717311U (en) * | 2014-01-27 | 2014-07-16 | 北京大学工学院包头研究院 | Integrated SCR (Selective Catalytic Reduction) system urea pump for vehicle |
| CN207048974U (en) * | 2017-04-18 | 2018-02-27 | 深圳市科睿精密科技有限公司 | Automobile urea spray gears pump |
| CN108425726A (en) * | 2018-03-28 | 2018-08-21 | 吉林大学 | A kind of SCR system heating device and its control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102048A (en) * | 2019-12-17 | 2020-05-05 | 凯龙高科技股份有限公司 | Heating and unfreezing control system and method for urea pump of SCR system |
| CN112032038A (en) * | 2020-09-11 | 2020-12-04 | 衡阳盈德气体有限公司 | Novel internal anti-icing device for piston liquid pump |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20181218 |