CN113565600A - 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
CN113565600A
CN113565600A CN202011083571.8A CN202011083571A CN113565600A CN 113565600 A CN113565600 A CN 113565600A CN 202011083571 A CN202011083571 A CN 202011083571A CN 113565600 A CN113565600 A CN 113565600A
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hydrogen
vehicle
lean
temperature
exhaust
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CN202011083571.8A
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CN113565600B (en
Inventor
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 CN202011083571.8A priority Critical patent/CN113565600B/en
Priority to PCT/CN2021/121997 priority patent/WO2022078227A1/en
Publication of CN113565600A publication Critical patent/CN113565600A/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

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 NOXTrapping device, hydrogen injection device, temperature sensor, air flow sensor, controller, and lean burn NOXAn arresting device is located in the exhaust line of the vehicle, wherein the temperature sensor is connected to the controller for detecting the lean NOXThe temperature within the trapping device; said air flow rate transferThe 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 coefficientXBaSO in a trapping device4Reducing the reaction product into BaO. The invention can prevent NO2Enters 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 tail gas treatment system and method of a vehicle and the vehicle.
Background
Lean NOXCapture (leanNO)Xtrap, LNT) device containing BaO in its inner coating layer, functioning to store NO2And reduction of NO2。
BaO storing NO2And reduction of NO2The principle of (1) is as follows:
BaO+2NO2+1/2O2→Ba(NO3)2
Ba(NO3)2+CO2→BaCO3+3NO2+1/2O2
Ba(NO3)2+3H2+CO2→BaCO3+2NO+2CO2
Ba(NO3)2+1/3C3H6→BaCO3+2NO+H2O
however, BaO forms BaSO under certain temperature and oxygen conditions through the following reaction4：
S+O2→SO2
BaO+1/2O2+SO2→BaSO4
Under a certain condition, BaSO4BaSO may occur4Agglomeration of such agglomerated BaSO4Failure to revert to BaO, therefore, may result in the LNT storing NO2And release of NO2Is reduced and is not recoverable.
When the internal temperature of the LNT device is lower than 300 ℃, BaO has the function of storing NO2At LNT internal temperatures above 300 ℃, BaO acts to release NO2Released NO2Is purified by a subsequent Selective Catalytic Reduction (SCR) reaction at a temperature of at least 190 ℃. If LNT stores NO2And release of NO2Such that NO can be stored when the internal temperature of the LNT device is lower than 300 c2To make NO2Into the SCR, possibly resulting in NO2When 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 NO2Enters 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 NOXTrapping device, hydrogen injection device, temperature sensor, air flow sensor, controller, and lean burn NOXAn arresting device is located in the exhaust line of the vehicle, wherein the temperature sensor is connected to the controller for detecting the lean NOXThe 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 coefficientXBaSO in a trapping device4Reducing 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: 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.
Further, the hydrogen nozzle is positioned at the lean NOXFront row of trapping devices with respect to the direction of exhaust flowIn the gas line.
Compared with the prior art, the vehicle exhaust gas treatment system has the following advantages:
the system comprises: lean NOXTrapping device, hydrogen injection device, temperature sensor, air flow sensor, controller, and lean burn NOXAn arresting device is located in the exhaust line of the vehicle, wherein the temperature sensor is connected to the controller for detecting the lean NOXThe 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 coefficientXBaSO in a trapping device4Reducing the reaction product into BaO. The invention leads the NO to be leanXTrapping BaSO present in the device4Reduction to BaO, preventing lean NOXBaSO occurring in the trap4Agglomeration, normal storage and release of NO2。
Another objective of the present invention is to provide a method for treating exhaust gas of a vehicle to prevent NO2Enters 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 NOXBased on trapping means and hydrogen injection means, said lean-burn NOXThe trapping device is located in an exhaust line of the vehicle, the method comprising: detecting the lean NOXThe 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 coefficientXBaSO in a trapping device4Reducing 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 NOXThe 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 NO2Enters 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 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.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit 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 NOXTrapping 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 NOXTrapping device 1, hydrogen injection device 2, temperature sensor 3, air flow sensor 4, controller 5, lean NOXThe 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 NOXThe 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 coefficientXBaSO in trap device 14Reducing the reaction product into BaO.
For example, BaSO4Can be reduced to BaO at high temperatures (e.g., above 650 ℃), which reacts as follows:
BaSO4+H2→BaO+H2O+SO2
SO2+3H2→H2S+2H2O
in addition, lean NOXBaO in the trap device 1 is SO-substituted2Reaction ofFormation of BaSO4Later, lean burn NO is encounteredXWhen 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 generated4And (4) agglomeration. Therefore, the present invention is particularly useful for detecting lean NOXThe temperature in the trap device 1 and the air flow rate in the intake line are detected to calculate the excess air factor, BaSO4When agglomeration is likely to occur, i.e. lean burning of NOXWhen 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 BaSO4React with hydrogen to be reduced into BaO to avoid BaSO4Agglomeration to ensure lean combustion of NOXTrap device 1 stores NO2And release of NO2The 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 0.2mm2Can 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 achieved2Greater than or equal to 1.2% of the exhaust in the exhaust line, a pump pressure of 7bar may be provided.
In addition, the hydrogen gas nozzle 23 is locatedThe lean burn NOXThe 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 23X Trap 1 for use with lean-burn NOXBaSO in the trap device 14The 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 NOXBased on the trapping device 1 and the hydrogen injection device 2, the lean-burn NOXThe 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 NOXBaSO in trap device 14Reducing 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 NOXThe 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 (10)

1. An exhaust gas treatment system for a vehicle, the system comprising:
lean NOXTrapping device, hydrogen injection device, temperature sensor, air flow sensor, controller, and lean burn NOXThe 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 NOXThe 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 coefficientXBaSO in a trapping device4Reducing the reaction product into BaO.
2. The vehicle exhaust treatment system of claim 1, wherein 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.
3. 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.
4. 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.
5. The vehicle exhaust treatment system of claim 4, wherein the hydrogen injector is located at the lean NOXThe trap device is disposed in the exhaust line at a front end with respect to the direction of the exhaust flow.
6. Method for treating exhaust gases of a vehicle, characterized in that the method is carried out in lean NOXBased on trapping means and hydrogen injection means, said lean-burn NOXThe trapping device is located in an exhaust line of the vehicle, the method comprising:
detecting the lean NOXThe 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 coefficientXBaSO in a trapping device4Reducing the reaction product into BaO.
7. The vehicle exhaust gas treatment method according to claim 6, wherein the controlling the hydrogen injection device to inject hydrogen gas 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.
8. The vehicle exhaust gas treatment method according to claim 6, wherein the hydrogen gas injection device includes hydrogen gasA nozzle, the hydrogen nozzle being located at the lean NOXThe trap device is disposed in the exhaust line at a front end with respect to the direction of the exhaust flow.
9. The vehicle exhaust gas treatment method according to claim 6, 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.
10. A vehicle, characterized in that the vehicle comprises an exhaust gas treatment system of a vehicle according to any of claims 1-5.
CN202011083571.8A 2020-10-12 2020-10-12 Vehicle exhaust gas treatment system and method and vehicle Active CN113565600B (en)

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CN202011083571.8A CN113565600B (en) 2020-10-12 2020-10-12 Vehicle exhaust gas treatment system and method and vehicle
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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