CN107701274A - DPF active regeneration systems and renovation process - Google Patents
DPF active regeneration systems and renovation process Download PDFInfo
- Publication number
- CN107701274A CN107701274A CN201711142995.5A CN201711142995A CN107701274A CN 107701274 A CN107701274 A CN 107701274A CN 201711142995 A CN201711142995 A CN 201711142995A CN 107701274 A CN107701274 A CN 107701274A
- Authority
- CN
- China
- Prior art keywords
- dpf
- control unit
- lnt
- temperature
- lnt device
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
-
- 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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
-
- 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
- F01N2570/10—Carbon or carbon oxides
-
- 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
- F01N2570/12—Hydrocarbons
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of DPF active regeneration systems and renovation process, belong to motor exhaust processing technology field, the regenerative system includes control unit and the LNT device and DPF device that are sequentially connected, the blast pipe of diesel engine is sequentially connected LNT device and DPF device, and diesel engine vent gas is purified；The renovation process is to control whether engine fuel injector performs remote rear spray according to the temperature of LNT device and DPF exhaust back pressure by control unit, when the exhaust back pressure and LNT device temperature of DPF device reach setting numerical value, control unit control fuel injector carries out remote rear spray, the gaseous mixture that spray is formed after remote is quickly discharged into blast pipe, noble metal catalyst in LNT device makes CO and oxidizing hydrocarbon at a certain temperature, produce substantial amounts of heat, the tail gas of high temperature is when passing through DPF device, burn the particulate matter that DPF is trapped, so as to reach the purpose of dpf regeneration.
Description
Technical field
The invention belongs to motor exhaust processing technology field, more particularly to a kind of DPF active regeneration systems and regeneration side
Method.
Background technology
Nitrogen oxides and soot dust granule are main harmful substances in exhaust emissions of diesel engine, and nitrogen oxides mainly utilizes selection
Property catalytic reduction technique and nitrogen oxide storage and reduction technology remove, and DPF（Diesel particulate filter）It is to be used for reducing at present
Diesel engine soot dust granule discharges maximally effective equipment.The particulate matter in tail gas is trapped using DPF, with the lengthening of working time,
When the particulate matter of DPF trappings reaches certain amount, DPF exhaust back pressure rise, exhaust resistance increase, the power performance of diesel engine
It is decreased obviously with economic performance.This particulate matter for just needing to be trapped DPF using measure is removed, to realize dpf regeneration.
At present, conventional dpf regeneration method has initiative regeneration and passive regeneration.Wherein, initiative regeneration method has burner
Oil spout thermal regeneration, electrical heating regeneration, microwave heating regeneration and infrared heating regeneration.Burner oil spout thermal regeneration needs to carry
For extra fuel oil, and require the temperature of constant combustion device；Requirement of the electrical heating regeneration to control system is higher, while power consumption
Amount is higher, is not suitable for the diesel engine of middle low power；The key technology of microwave heating regeneration is how to be use up in resonator underexcitation
The ignition temperature of soot particulate in pattern and its control chamber more than possible, prevent from damaging because temperature is too high in filtering body.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of DPF active regeneration systems, by simplifying DPF active again
Carded sliver part, the purpose of DPF periodic active regenerations is realized, extend DPF service life, ensure that diesel engine vent gas purification effect
Fruit.
In order to solve the above technical problems, the technical solution used in the present invention is：
A kind of DPF active regeneration systems, including control unit and the LNT device and DPF device that are sequentially connected, described control unit
The remote rear spray of fuel injector in diesel engine is controlled, the blast pipe of diesel engine is connected with LNT device one end, the LNT dresses
Put the other end by blast pipe with DPF device to be connected, the waste gas of diesel engine is discharged after LNT device and DPF device purification.
Preferably, the DPF device is anterior is provided with pressure sensor, and the LNT device is provided with temperature sensor, the pressure
Force snesor and temperature sensor are connected with control unit.
Preferably, the blast pipe between the LNT device and DPF device is provided with NOx concentration sensor, the NOx concentration
Sensor is connected with control unit.
The present invention also provides a kind of DPF initiative regenerations method of above-mentioned DPF active regeneration systems, comprises the following steps：
A, pressure sensor and temperature sensor gathered data, send control unit to；DPF is gathered in real time using pressure sensor
The exhaust back pressure of device, temperature sensor gather the temperature of LNT device in real time；
B, control unit compares the DPF device exhaust back pressure data of collection with setting value, if the row of collection DPF device in real time
Gas back pressure reaches setting value, then performs step C, if the exhaust back pressure of collection DPF device is not reaching to setting value in real time, performs
Step D；
C, whether the temperature of control unit detection LNT device reaches predetermined value；If it is, after control unit control fuel injector is remote
Spray, it is remote after in the cylinder that is formed of spray the CO of high concentration and hydrocarbon gaseous mixture be quickly discharged into blast pipe, in LNT device
Noble metal catalyst oxidation makes CO and oxidizing hydrocarbon at a certain temperature, produces substantial amounts of heat, high-temperature tail gas combustion
DPF device endoparticle thing is burnt, realizes the initiative regeneration of DPF device；If it is not, then perform step D；
D, whether NOx concentration reaches predetermined value in the exhaust of control unit detection DPF device, if it is, control unit controls
Fuel injector is far sprayed afterwards, and the CO and hydrocarbon gaseous mixture of high concentration in the cylinder formed are sprayed after remote, and LNT device can discharge NO2,
And then NO2 is reduced to N2 under CO and hydrocarbon effect；If it is not, then LNT device normally traps NOx in tail gas.
It is using beneficial effect caused by above-mentioned technical proposal：The present invention utilizes the combination of LNT device and DPF device
To adsorb the nitrogen oxides and particulate matter in diesel engine vent gas respectively, reach the purpose of purification of diesel tail gas；Control unit according to
Remote rear spray whether is performed according to NOx concentration control engine fuel injector in the temperature of LNT device and the exhaust of DPF device, when DPF is filled
When the exhaust back pressure and LNT device temperature put reach setting numerical value, control unit control fuel injector sprays after carrying out far, sprays shape after remote
Into cylinder in gaseous mixture be quickly discharged into blast pipe, therefore CO in diesel engine vent gas and hydrocarbon concentration are larger, LNT dresses
Noble metal catalyst in putting makes CO and oxidizing hydrocarbon at a certain temperature, produces substantial amounts of heat, LNT outlet
Exhaust temperature is increased to 600 degree or so, and the tail gas of high temperature is when passing through DPF device, the particulate matter of burning DPF trappings, so as to reach
To the purpose of dpf regeneration.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is a kind of structural representation of DPF active regeneration systems provided in an embodiment of the present invention；
Fig. 2 is a kind of workflow diagram of DPF active regeneration systems provided in an embodiment of the present invention；
In figure：1- blast pipes, 2- pressure sensors, 3- temperature sensors, 4- NOx concentration sensors.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Also referring to Fig. 1, now a kind of DPF active regeneration systems provided by the invention are illustrated, the DPF is actively
Regenerative system includes control unit and the LNT device and DPF device that are sequentially connected, and described control unit is controlled in diesel engine
The remote rear spray of fuel injector, the blast pipe 1 of diesel engine are connected with LNT device one end, and the LNT device other end fills with DPF
Put connected, the waste gas of diesel engine is discharged after LNT device and DPF device purification.
As a kind of preferred structure, the DPF device is anterior to be provided with pressure sensor 2, and the LNT device passes provided with temperature
Sensor 3, the pressure sensor 2 and temperature sensor 3 are connected with control unit.Utilize temperature sensor and pressure sensor
The temperature and pressure of LNT device and DPF device can be monitored in real time, and control unit determines fuel injector in diesel engine according to this
Remote rear spray whether is carried out, improves automaticity.
In one particular embodiment of the present invention, it is dense to be provided with NOx for the blast pipe between the LNT device and DPF device
Sensor is spent, the NOx concentration sensor is connected with control unit.LNT device can be monitored on-line using NOx concentration sensor
Exhaust in NOx concentration, control unit determine according to this in diesel engine fuel injector whether carry out it is remote after spray.
Also referring to Fig. 1,2, the present invention also provides a kind of DPF initiative regenerations method of above-mentioned DPF active regeneration systems,
Comprise the following steps：
A, pressure sensor and temperature sensor gathered data, send control unit to；DPF is gathered in real time using pressure sensor
The exhaust back pressure of device, temperature sensor gather the temperature of LNT device in real time；
B, control unit compares the DPF device exhaust back pressure data of collection with setting value, if the row of collection DPF device in real time
Gas back pressure reaches setting value, then performs step C, if the exhaust back pressure of collection DPF device is not reaching to setting value in real time, performs
Step D；
C, whether the temperature of control unit detection LNT device reaches predetermined value；If it is, after control unit control fuel injector is remote
Spray, it is remote after in the cylinder that is formed of spray the CO of high concentration and hydrocarbon gaseous mixture be quickly discharged into blast pipe, in LNT device
Noble metal catalyst oxidation makes CO and oxidizing hydrocarbon at a certain temperature, produces substantial amounts of heat, high-temperature tail gas combustion
DPF device endoparticle thing is burnt, realizes the initiative regeneration of DPF device；If it is not, then perform step D；
D, whether NOx concentration reaches predetermined value in the exhaust of control unit detection DPF device, if it is, control unit controls
Fuel injector is far sprayed afterwards, and the CO and hydrocarbon gaseous mixture of high concentration in the cylinder formed are sprayed after remote, and LNT device can discharge NO2,
And then NO2 is reduced to N2 under CO and hydrocarbon effect；If it is not, then LNT device normally traps NOx in tail gas.
In summary, the present invention adsorbs the nitrogen oxygen in diesel engine vent gas respectively using the combination of LNT device and DPF device
Compound and particulate matter, the exhaust back pressure of DPF device is detected in real time by the anterior pressure sensor of DPF device, by LNT
Temperature sensor on device detects temperature in LNT device, and control unit is according to the exhaust back pressure of DPF device, LNT device
NOx concentration judges whether to control fuel injector to carry out remote rear spray in the exhaust of temperature and DPF device.When DPF device exhaust back pressure,
When NOx concentration reaches setting numerical value in the exhaust of LNT device temperature and DPF device, after control unit control fuel injector is carried out far
Spray, it is remote after in the cylinder that is formed of spray gaseous mixture be quickly discharged into blast pipe, therefore CO in diesel engine vent gas and hydrocarbon are dense
Spend larger, the noble metal catalyst in LNT device makes CO and oxidizing hydrocarbon at a certain temperature, produces substantial amounts of heat
Amount, the outlet exhaust temperature of LNT device are increased to 600 degree or so, and when passing through DPF device, burn the tail gas of high temperature DPF device
The particulate matter of trapping, so as to reach the purpose of dpf regeneration.
Many details are elaborated in superincumbent description to facilitate a thorough understanding of the present invention, still the present invention can be with
It is different from other manner described here using other to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by particular embodiments disclosed above.
Claims (4)
- A kind of 1. DPF active regeneration systems, it is characterised in that：Filled including control unit and the LNT device being sequentially connected and DPF Put, the remote rear spray of fuel injector, blast pipe and LNT device one end of diesel engine in described control unit control diesel engine It is connected, the LNT device other end is connected by blast pipe with DPF device, and the waste gas of diesel engine is through LNT device and DPF Discharged after device purification.
- 2. DPF active regeneration systems as claimed in claim 1, it is characterised in that：The DPF device is anterior to be provided with pressure sensing Device, the LNT device are provided with temperature sensor, NOx concentration sensor, pressure sensor and the temperature sensor with control Unit is connected.
- 3. DPF active regeneration systems as claimed in claim 2, it is characterised in that：Row between the LNT device and DPF device Tracheae is provided with NOx concentration sensor, and the NOx concentration sensor is connected with control unit.
- 4. the renovation process of DPF active regeneration systems as claimed in claim 3, it is characterised in that comprise the following steps：A, pressure sensor and temperature sensor gathered data, send control unit to；DPF is gathered in real time using pressure sensor The exhaust back pressure of device, temperature sensor gather the temperature of LNT device in real time；B, control unit compares the DPF device exhaust back pressure data of collection with setting value, if the row of collection DPF device in real time Gas back pressure reaches setting value, then performs step C, if the exhaust back pressure of collection DPF device is not reaching to setting value in real time, performs Step D；C, whether the temperature of control unit detection LNT device reaches predetermined value；If it is, after control unit control fuel injector is remote Spray, it is remote after in the cylinder that is formed of spray the CO of high concentration and hydrocarbon gaseous mixture be quickly discharged into blast pipe, in LNT device Noble metal catalyst oxidation makes CO and oxidizing hydrocarbon at a certain temperature, produces substantial amounts of heat, high-temperature tail gas combustion DPF device endoparticle thing is burnt, realizes the initiative regeneration of DPF device；If it is not, then perform step D；D, whether NOx concentration reaches predetermined value in the exhaust of control unit detection DPF device, if it is, control unit controls Fuel injector is far sprayed afterwards, and the CO and hydrocarbon gaseous mixture of high concentration in the cylinder formed are sprayed after remote, and LNT device can discharge NO2, And then NO2 is reduced to N2 under CO and hydrocarbon effect；If it is not, then LNT device normally traps NOx in tail gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711142995.5A CN107701274A (en) | 2017-11-17 | 2017-11-17 | DPF active regeneration systems and renovation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711142995.5A CN107701274A (en) | 2017-11-17 | 2017-11-17 | DPF active regeneration systems and renovation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107701274A true CN107701274A (en) | 2018-02-16 |
Family
ID=61180232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711142995.5A Pending CN107701274A (en) | 2017-11-17 | 2017-11-17 | DPF active regeneration systems and renovation process |
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| CN (1) | CN107701274A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109564A (en) * | 2021-11-30 | 2022-03-01 | 宁波楷世环保科技有限公司 | Tail gas treatment system only comprising Diesel Particulate Filter (DPF) |
| CN114645794A (en) * | 2021-04-26 | 2022-06-21 | 长城汽车股份有限公司 | Exhaust aftertreatment control method and device and terminal equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120056601A (en) * | 2010-11-25 | 2012-06-04 | 현대자동차주식회사 | Exhaust gas post processing system |
| CN102844532A (en) * | 2010-04-15 | 2012-12-26 | 五十铃自动车株式会社 | Exhaust gas purification device |
-
2017
- 2017-11-17 CN CN201711142995.5A patent/CN107701274A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102844532A (en) * | 2010-04-15 | 2012-12-26 | 五十铃自动车株式会社 | Exhaust gas purification device |
| KR20120056601A (en) * | 2010-11-25 | 2012-06-04 | 현대자동차주식회사 | Exhaust gas post processing system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645794A (en) * | 2021-04-26 | 2022-06-21 | 长城汽车股份有限公司 | Exhaust aftertreatment control method and device and terminal equipment |
| CN114109564A (en) * | 2021-11-30 | 2022-03-01 | 宁波楷世环保科技有限公司 | Tail gas treatment system only comprising Diesel Particulate Filter (DPF) |
| CN114109564B (en) * | 2021-11-30 | 2022-08-30 | 宁波楷世环保科技有限公司 | Tail gas treatment system only comprising Diesel Particulate Filter (DPF) |
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Application publication date: 20180216 |