CN113565600B - Vehicle exhaust gas treatment system and method and vehicle - Google Patents

Vehicle exhaust gas treatment system and method and vehicle Download PDF

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Publication number
CN113565600B
CN113565600B CN202011083571.8A CN202011083571A CN113565600B CN 113565600 B CN113565600 B CN 113565600B CN 202011083571 A CN202011083571 A CN 202011083571A CN 113565600 B CN113565600 B CN 113565600B
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hydrogen
vehicle
lean
temperature
injection device
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CN113565600A (en
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赵振兴
石伟
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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Priority to PCT/CN2021/121997 priority patent/WO2022078227A1/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9495—Controlling the catalytic process
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/202—Hydrogen
    • 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)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention relates to the technical field of vehicle control, and provides a vehicle tail gas treatment system and method and a vehicle. The system comprises: lean NO X Trapping device, hydrogen injection device, temperature sensor, air flow sensor, controller, and lean burn NO X An arresting device is located in the exhaust line of the vehicle, wherein the temperature sensor is connected to the controller for detecting the lean NO X The temperature within the trapping device; the air flow sensor is connected with the controller and used for detecting the air flow of an air inlet pipeline of the vehicle; the controller is connected with the hydrogen injection device and used for calculating an excess air coefficient according to the air flow; controlling the hydrogen injection device to inject hydrogen to lean the NO according to the temperature and the excess air coefficient X BaSO in a trapping device 4 Reducing the reaction product into BaO. The invention can prevent NO 2 Enters the SCR when it cannot be cleaned.

Description

Vehicle exhaust gas treatment system and method and vehicle
Technical Field
The invention relates to the technical field of vehicle control, in particular to a vehicle and an exhaust gas treatment system and method thereof.
Background
Lean burn NO X Capture (leanNO) X trap, LNT) device having BaO in the inner coating layer, functioning to store NO 2 And reduction of NO 2 。
BaO storing NO 2 And reduction of NO 2 The principle of (1) is as follows:
BaO+2NO 2 +1/2O 2 →Ba(NO 3 ) 2
Ba(NO 3 ) 2 +CO 2 →BaCO 3 +3NO 2 +1/2O 2
Ba(NO 3 ) 2 +3H 2 +CO 2 →BaCO 3 +2NO+2CO 2
Ba(NO 3 ) 2 +1/3C 3 H 6 →BaCO 3 +2NO+H 2 O
however, BaO forms BaSO under certain temperature and oxygen conditions through the following reaction 4 ：
S+O 2 →SO 2
BaO+1/2O 2 +SO 2 →BaSO 4
Under a certain condition, BaSO 4 BaSO may occur 4 Agglomerated BaSO 4 Failure to revert to BaO, therefore, may result in the LNT storing NO 2 And release of NO 2 Is reduced and is not recoverable.
When the internal temperature of the LNT device is lower than 300 ℃, BaO has the function of storing NO 2 When the internal temperature of LNT is higher than 300 ℃, BaO has the function of releasing NO 2 Released NO 2 Is purified by a subsequent Selective Catalytic Reduction (SCR) reaction at a temperature of at least 190 ℃. If LNT stores NO 2 And release of NO 2 Such that NO can be stored when the internal temperature of the LNT device is lower than 300 c 2 To make NO 2 Into the SCR, possibly resulting in NO 2 When in SCR, the temperature is lower than 190 ℃ and cannot be purified by reaction, thereby causing emission pollution.
Disclosure of Invention
In view of the above, the present invention is directed to an exhaust gas treatment system for a vehicle to prevent NO 2 Enters the SCR when it cannot be cleaned.
In order to achieve the above object, an embodiment of the present invention provides an exhaust gas treatment system for a vehicle, including: lean burn NO X Trapping device, hydrogen injection device, temperature sensor, air flow sensor, controller, and lean burn NO X An arresting device is located in the exhaust line of the vehicle, wherein the temperature sensor is connected to the controller for detecting the lean NO X In the trap deviceThe temperature of (a); the air flow sensor is connected with the controller and used for detecting the air flow of an air inlet pipeline of the vehicle; the controller is connected with the hydrogen injection device and used for calculating an excess air coefficient according to the air flow; controlling the hydrogen injection device to inject hydrogen to lean burn NO according to the temperature and the excess air coefficient X BaSO in a trap 4 Reducing the reaction product into BaO.
Further, the controller is configured to: and when the temperature is higher than a preset temperature and the excess air coefficient is higher than a preset coefficient, controlling the hydrogen injection device to inject hydrogen.
Further, the molar quantity of the hydrogen injected in the preset time is more than or equal to 1.2% of the molar quantity of the exhaust gas in the exhaust pipeline in the preset time.
Further, the hydrogen gas injection device includes: a hydrogen storage, a hydrogen gas nozzle, and a supply pump for ejecting hydrogen gas in the hydrogen storage from the hydrogen gas nozzle.
Further, the hydrogen nozzle is positioned at the lean NO X An exhaust line at the front end of the trap device with respect to the direction of exhaust gas flow.
Compared with the prior art, the vehicle exhaust gas treatment system has the following advantages:
the system comprises: lean NO X Trapping device, hydrogen injection device, temperature sensor, air flow sensor, controller, and lean burn NO X An accumulation device is located in an exhaust line of the vehicle, wherein the temperature sensor is connected to the controller for detecting the lean NO X The temperature within the trapping device; the air flow sensor is connected with the controller and used for detecting the air flow of an air inlet pipeline of the vehicle; the controller is connected with the hydrogen injection device and used for calculating an excess air coefficient according to the air flow; controlling the hydrogen injection device to inject hydrogen to lean burn NO according to the temperature and the excess air coefficient X BaSO in a trapping device 4 Reducing the reaction product into BaO. The invention leads the NO to be lean X Trapping BaSO present in the device 4 Reduction to BaO to prevent lean NO X Occurrence of BaSO in the trap 4 Agglomeration, normal storage and release of NO 2 。
Another objective of the present invention is to provide a method for treating exhaust gas of a vehicle to prevent NO 2 Enters the SCR when it cannot be cleaned.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
method for treating exhaust gas of vehicle in lean burn NO X Based on trapping device and hydrogen injection device, the lean NO X The trapping device is located in an exhaust line of the vehicle, the method comprising: detecting the lean NO X The temperature within the trapping device; detecting an air flow rate of an air intake line of the vehicle; calculating an excess air factor from the air flow; controlling the hydrogen injection device to inject hydrogen to lean the NO according to the temperature and the excess air coefficient X BaSO in a trapping device 4 Reducing the reaction product into BaO.
Further, the controlling the hydrogen injection device to inject hydrogen according to the temperature and the excess air ratio includes: and when the temperature is higher than a preset temperature and the excess air coefficient is higher than a preset coefficient, controlling the hydrogen injection device to inject hydrogen.
Further, the hydrogen injection device comprises a hydrogen nozzle which is positioned at the lean NO X The trap device is disposed in the exhaust line at a front end with respect to the direction of the exhaust flow.
Further, the molar quantity of the hydrogen injected in the preset time is more than or equal to 1.2% of the molar quantity of the exhaust gas in the exhaust pipeline in the preset time.
The vehicle exhaust gas treatment method has the same advantages as the vehicle exhaust gas treatment system compared with the prior art, and is not described herein again.
Another object of the present invention is to provide a vehicle to prevent NO 2 Enters the SCR when it cannot be cleaned.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle comprising an exhaust gas treatment system of a vehicle as hereinbefore described.
The advantages of the vehicle exhaust gas treatment method and the vehicle exhaust gas treatment system are the same as those of the vehicle exhaust gas treatment system in comparison with the prior art, and are not described again.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:
fig. 1 is a block diagram of an exhaust gas treatment system of a vehicle according to an embodiment of the present invention;
fig. 2 is a block diagram of an exhaust gas treatment system of a vehicle according to another embodiment of the present invention;
fig. 3 is a flowchart of an exhaust gas treatment method for a vehicle according to an embodiment of the present invention.
Description of reference numerals:
1 lean NO X Trapping device 2 hydrogen gas injection device
3 temperature sensor 4 air flow sensor
5 controller 21 hydrogen storage
22 supply pump 23 hydrogen nozzle
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a block diagram of an exhaust gas treatment system of a vehicle according to an embodiment of the present invention. As shown in fig. 1, the system includes: lean NO X Catching container1, a hydrogen injection device 2, a temperature sensor 3, an air flow sensor 4 and a controller 5, lean NO X The trap device 1 is located in the exhaust line of said vehicle, wherein said temperature sensor 3 is connected to said controller 5 for detecting said lean NO X The temperature inside the trapping device 1; the air flow sensor 4 is connected with the controller 5 and used for detecting the air flow of an air inlet pipeline of the vehicle; the controller 5 is connected with the hydrogen injection device 2 and used for calculating an excess air coefficient according to the air flow; controlling the hydrogen injection device 2 to inject hydrogen to lean burn NO according to the temperature and the excess air coefficient X BaSO in trap device 1 4 Reducing the reaction product into BaO.
For example, BaSO 4 Can be reduced to BaO at high temperatures (e.g., above 650 ℃), which reacts as follows:
BaSO 4 +H 2 →BaO+H 2 O+SO 2
SO 2 +3H 2 →H 2 S+2H 2 O
in addition, lean NO X BaO in the trap device 1 is SO-substituted 2 Reaction to produce BaSO 4 Later, lean burn NO is encountered X When the internal temperature of the trapping device 1 is higher than 650 ℃ and the excess air coefficient is higher than 1.2, BaSO can be generated 4 And (4) agglomeration. Therefore, the present invention is particularly useful for detecting lean NO X The temperature in the trap device 1 and the air flow rate in the intake line are detected to calculate the excess air factor, BaSO 4 When agglomeration is likely to occur, i.e. lean burning of NO X When the internal temperature of the trapping device 1 is higher than a preset temperature (e.g., 650 deg.C) and the excess air ratio is higher than a preset ratio (e.g., 1.2), the hydrogen gas injection device 2 is controlled to inject hydrogen gas so that BaSO 4 Reacting with hydrogen to reduce to BaO and avoid BaSO 4 Agglomeration to ensure lean combustion of NO X Trap device 1 stores NO 2 And release of NO 2 The ability of the cell to perform.
Fig. 2 is a block diagram of an exhaust gas treatment system of a vehicle according to another embodiment of the present invention. As shown in fig. 2, the hydrogen gas injection device 2 includes: a hydrogen storage 21, a hydrogen gas nozzle 23 and a supply pump 22, wherein the controller 5 directly controls the supply pump 22 to spray the hydrogen gas in the hydrogen storage 21 out of the hydrogen gas nozzle 23, specifically, the inlet of the supply pump 22 is connected with the hydrogen storage 21, and the outlet is connected with the hydrogen gas nozzle 23. Preferably, the molar quantity of the hydrogen injected in the preset time is greater than or equal to 1.2% of the molar quantity of the exhaust gas in the exhaust pipeline in the preset time, and the preset time can be any length of time, which is not limited herein.
Based on the amount of hydrogen injected, the orifice diameter of the hydrogen nozzle 23 and the pump pressure of the supply pump 22 can be designed so as to be able to supply 1.2% or more of hydrogen gas of the exhaust gas in the exhaust line. For example, the orifice diameter of the hydrogen gas nozzle 23 may be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.7mm, etc., assuming that H is ejected with an orifice diameter of 0.2mm 2 Can reach more than or equal to 1.2% of the exhaust in the exhaust pipeline, and the diameter of the nozzle can be set to be 0.2 mm. Correspondingly, the pump pressure of the feed pump 22 may be, for example, 5bar, 6bar, 7bar, etc., provided that the pump pressure is 7bar, H may be achieved 2 Greater than or equal to 1.2% of the exhaust gas in the exhaust line, a pump pressure of 7bar may be set.
In addition, the hydrogen nozzle 23 is located at the lean NO X The trap device 1 is disposed in the exhaust line at the front end with respect to the direction of the exhaust gas flow. The arrangement is convenient for the hydrogen and the exhaust gas to enter the lean burn NO together after the hydrogen is sprayed out by the hydrogen nozzle 23 X Trap 1 for use with lean-burn NO X BaSO in the trap device 1 4 The reaction is carried out.
Fig. 3 is a flowchart of an exhaust gas treatment method for a vehicle according to an embodiment of the present invention. As shown in FIG. 3, the method is performed in lean NO X Based on the trapping device 1 and the hydrogen injection device 2, the lean-burn NO X The trapping device 1 is located in an exhaust line of said vehicle, the method comprising:
step S31 of detecting the temperature in the lean NOX trap device 1;
step S32, detecting an air flow rate of an intake pipe of the vehicle;
step S33, calculating an excess air coefficient according to the air flow;
step S34, controlling the hydrogen injection device 2 to inject hydrogen according to the temperature and the excess air coefficient so as to lean burn NO X BaSO in trap device 1 4 Reducing the reaction product into BaO.
Further, the controlling the hydrogen injection device 2 to inject hydrogen according to the temperature and the excess air ratio includes: and when the temperature is higher than the preset temperature and the excess air coefficient is higher than the preset coefficient, controlling the hydrogen injection device 2 to inject hydrogen.
Further, the hydrogen injection device 2 comprises a hydrogen nozzle 23, and the hydrogen nozzle 23 is positioned at the lean NO X The trap device 1 is disposed in the exhaust line at the front end with respect to the direction of the exhaust gas flow.
Further, the molar quantity of the hydrogen injected in the preset time is more than or equal to 1.2% of the molar quantity of the exhaust gas in the exhaust pipeline in the preset time.
Embodiments of the present invention further provide a vehicle, which includes the exhaust gas treatment system of the vehicle described above.
The embodiments of the vehicle and the exhaust gas treatment system of the vehicle described above are similar to the embodiments of the exhaust gas treatment method of the vehicle described above, and are not described again here.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. An exhaust gas treatment system for a vehicle, the system comprising:
lean NO X Trapping device, hydrogen injection device, temperature sensor, air flow sensor, controller, and lean burn NO X The trapping device is located in an exhaust line of the vehicle, wherein,
the temperature sensor is connected with the controller and is used for detecting the lean NO X The temperature within the trapping device;
the air flow sensor is connected with the controller and used for detecting the air flow of an air inlet pipeline of the vehicle;
the controller is connected with the hydrogen injection device and used for calculating an excess air coefficient according to the air flow; controlling the hydrogen injection device to inject hydrogen to lean burn NO according to the temperature and the excess air coefficient X BaSO in a trapping device 4 The reaction is reduced to BaO, and the BaO is reduced to BaO,
wherein the controller is to: and when the temperature is higher than a preset temperature and the excess air coefficient is higher than a preset coefficient, controlling the hydrogen injection device to inject hydrogen.
2. The vehicular exhaust gas treatment system according to claim 1, wherein the molar amount of hydrogen gas injected in a preset time is 1.2% or more of the molar amount of exhaust gas in the exhaust line in the preset time.
3. The exhaust gas treatment system for a vehicle according to claim 1, wherein the hydrogen gas injection device comprises:
the hydrogen supplying device comprises a hydrogen storage, a hydrogen gas nozzle and a supplying pump, wherein the supplying pump is used for spraying the hydrogen gas in the hydrogen storage from the hydrogen gas nozzle.
4. The vehicle exhaust treatment system of claim 3, wherein the hydrogen injector is located at the lean NO X The trap device is disposed in the exhaust line at a front end with respect to the direction of the exhaust flow.
5. Method for treating exhaust gases of a vehicle, characterized in that the method is carried out in lean NO X Based on trapping means and hydrogen injection means, said lean-burn NO X The trapping device is located in an exhaust line of the vehicle, the method comprising:
detecting the lean NO X The temperature within the trapping device;
detecting an air flow rate of an air intake line of the vehicle;
calculating an excess air factor from the air flow;
controlling the hydrogen injection device to inject hydrogen to lean burn NO according to the temperature and the excess air coefficient X BaSO in a trapping device 4 The reaction solution is reduced into BaO to obtain BaO,
wherein the controlling the hydrogen injection device to inject hydrogen according to the temperature and the excess air factor comprises:
and when the temperature is higher than a preset temperature and the excess air coefficient is higher than a preset coefficient, controlling the hydrogen injection device to inject hydrogen.
6. The vehicle exhaust gas treatment method according to claim 5, wherein the hydrogen injection device comprises a hydrogen nozzle located at the lean NO X The trap device is disposed in the exhaust line at a front end with respect to the direction of the exhaust flow.
7. The vehicle exhaust gas treatment method according to claim 5, wherein the molar amount of hydrogen injected in a preset time is 1.2% or more of the molar amount of exhaust gas in the exhaust line in the preset time.
8. A vehicle, characterized in that the vehicle comprises an exhaust gas treatment system of a vehicle according to any of claims 1-4.
CN202011083571.8A 2020-10-12 2020-10-12 Vehicle exhaust gas treatment system and method and vehicle Active CN113565600B (en)

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PCT/CN2021/121997 WO2022078227A1 (en) 2020-10-12 2021-09-30 Exhaust gas treatment system and method for vehicle, and vehicle

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CN115111073B (en) * 2021-12-22 2024-04-12 长城汽车股份有限公司 Method and system for treating vehicle tail gas by adopting LNT device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6779339B1 (en) * 2003-05-02 2004-08-24 The United States Of America As Represented By The Environmental Protection Agency Method for NOx adsorber desulfation in a multi-path exhaust system
CN101575999A (en) * 2009-06-22 2009-11-11 哈尔滨工程大学 Hydrogen selective catalytic reduction device and control method thereof
CN104819036A (en) * 2014-02-05 2015-08-05 通用汽车环球科技运作有限责任公司 Aftertreatment system for internal combustion engines
CN107023355A (en) * 2015-12-11 2017-08-08 现代自动车株式会社 Waste gas cleaning system and its control method
JP2020051401A (en) * 2018-09-28 2020-04-02 いすゞ自動車株式会社 Exhaust emission control system and control method for the same
KR20200044414A (en) * 2018-10-19 2020-04-29 현대자동차주식회사 Exhaust gas purification system for vehicle

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001300262A (en) * 2000-04-18 2001-10-30 Toyota Motor Corp Exhaust gas purifying device and catalyst for purifying exhaust gas
JP4371242B2 (en) * 2001-04-03 2009-11-25 日産自動車株式会社 Exhaust gas purification system
US7571602B2 (en) * 2005-05-19 2009-08-11 Gm Global Technology Operations, Inc. Exhaust aftertreatment system and method of use for lean burn internal combustion engines
US8635855B2 (en) * 2009-06-17 2014-01-28 GM Global Technology Operations LLC Exhaust gas treatment system including a lean NOx trap and two-way catalyst and method of using the same
US8677734B2 (en) * 2010-04-19 2014-03-25 GM Global Technology Operations LLC Method of producing ammonia effective to control aftertreatment conditions of NOx emissions
KR101631149B1 (en) * 2010-04-21 2016-06-20 희성촉매 주식회사 Diesel engine exhaust gas purification device having ammonia decomposition module
CN102155278B (en) * 2011-03-25 2012-11-07 北京工业大学 Vehicle-mounted oxyhydrogen-making machine-based internal-combustion engine emission control device and control method thereof
CN102635429B (en) * 2012-04-26 2013-12-04 北京工业大学 Device and method for carrying out closed-loop control on discharge of internal combustion engine by using hydrogen and oxygen
US10449522B2 (en) * 2015-07-30 2019-10-22 Basf Corporation Process for manufacture of NOx storage materials
US20170072365A1 (en) * 2015-09-15 2017-03-16 Hyundai Motor Company Aftertreatment system for diesel vehicle
DE102018127219A1 (en) * 2018-10-31 2020-04-30 Keyou GmbH Catalyst for use in selective NOx reduction in NOx-containing exhaust gases, method for producing a catalyst, device for selective NOx reduction and method for selective NOx reduction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6779339B1 (en) * 2003-05-02 2004-08-24 The United States Of America As Represented By The Environmental Protection Agency Method for NOx adsorber desulfation in a multi-path exhaust system
CN101575999A (en) * 2009-06-22 2009-11-11 哈尔滨工程大学 Hydrogen selective catalytic reduction device and control method thereof
CN104819036A (en) * 2014-02-05 2015-08-05 通用汽车环球科技运作有限责任公司 Aftertreatment system for internal combustion engines
CN107023355A (en) * 2015-12-11 2017-08-08 现代自动车株式会社 Waste gas cleaning system and its control method
JP2020051401A (en) * 2018-09-28 2020-04-02 いすゞ自動車株式会社 Exhaust emission control system and control method for the same
KR20200044414A (en) * 2018-10-19 2020-04-29 현대자동차주식회사 Exhaust gas purification system for vehicle

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