CN117072291A - Automobile exhaust treatment method, device, equipment and medium based on air-fuel ratio - Google Patents
Automobile exhaust treatment method, device, equipment and medium based on air-fuel ratio Download PDFInfo
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- CN117072291A CN117072291A CN202311266865.8A CN202311266865A CN117072291A CN 117072291 A CN117072291 A CN 117072291A CN 202311266865 A CN202311266865 A CN 202311266865A CN 117072291 A CN117072291 A CN 117072291A
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- 239000001301 oxygen Substances 0.000 claims abstract description 82
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- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- F01N9/00—Electrical control of exhaust gas treating 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
- 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
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration 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
- 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
- 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
- F02D41/0002—Controlling intake air
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- 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 an automobile exhaust treatment method, device, equipment and medium based on air-fuel ratio. The method comprises the following steps: determining the air-fuel ratio of the engine according to the high-temperature-resistant oxygen sensor data connected to the original exhaust pipe of the engine; if the air-fuel ratio is lean, opening a solenoid valve of a lean-then-treatment system to enable the original exhaust tail gas in the original exhaust pipe of the engine to flow into the PNA module and the three-way catalyst in sequence; if the air-fuel ratio is rich, closing a solenoid valve of a lean-then-treatment system, and enabling the original exhaust gas in the original exhaust pipe of the engine to directly flow into a three-way catalyst. The embodiment of the invention can improve the treatment capability of the automobile exhaust.
Description
Technical Field
The invention relates to the technical field of gasoline vehicle tail gas purification, in particular to an automobile exhaust treatment method, device, equipment and medium based on air-fuel ratio.
Background
Along with implementation of carbon reaching peak and carbon neutralization strategies, carbon reduction and carbon reduction become main technical requirements of the automobile industry. For the traditional fuel oil vehicle, the further reduction of the exhaust emission on the basis of the prior art is the current development focus. The automobile exhaust catalyst is a device for converting CO, HC, NOx and other harmful gases in the original row of an engine into environment-friendly gases by means of exhaust gas source heat, and the core component of the automobile exhaust catalyst is a three-way catalyst: taking cordierite-loaded Ce/Zr solid solution as a carrier and platinum palladium rhodium as an active center. Ce is used as an oxygen storage and release material, the Ce material absorbs oxygen to generate CeO2 under lean combustion condition, and the CeO2 is reduced to Ce under rich combustion condition to balance the air-fuel ratio of the reaction system; zr is used as an auxiliary agent to stabilize the high temperature property of the catalyst; pt/Pd is used as an oxidation type catalytic active center to provide active sites for oxidation of CO and HC; rh acts as a catalytic active site of the reduction type, providing an active site for the reduction of NOx.
The national seventh emission standard is issued, and for the traditional fuel vehicles, how to further reduce the exhaust emission on the basis of the prior art becomes the current development focus. Due to the cost of noble metals, methods for increasing catalytic efficiency by increasing the noble metal loading have gradually lost meaning.
Three-way catalysis may provide maximum catalytic efficiency at the conditions of l amba=0.995. However, in the actual running process of the engine, the engine not only comprises a steady-state running condition, but also comprises a multi-working condition switching condition, such as low-temperature cold start, low-speed high power and the like. At this time, the internal combustion condition of the engine fluctuates, which directly causes the exhaust air-fuel ratio to fluctuate, and the three-way catalysis cannot provide the maximum catalytic efficiency at each moment.
Disclosure of Invention
The invention provides an automobile exhaust treatment method, device, equipment and medium based on air-fuel ratio, which are used for improving the treatment capacity of automobile exhaust.
According to an aspect of the present invention, there is provided an air-fuel ratio-based exhaust gas treatment method for an automobile, comprising:
determining the air-fuel ratio of the engine according to the high-temperature-resistant oxygen sensor data connected to the original exhaust pipe of the engine;
if the air-fuel ratio is lean, opening a solenoid valve of a lean-then-treatment system to enable the original exhaust tail gas in the original exhaust pipe of the engine to flow into the PNA module and the three-way catalyst in sequence;
if the air-fuel ratio is rich, closing a solenoid valve of a lean-then-treatment system, and enabling the original exhaust gas in the original exhaust pipe of the engine to directly flow into a three-way catalyst.
According to another aspect of the present invention, there is provided an air-fuel ratio-based exhaust gas treatment device for an automobile, comprising:
the air-fuel ratio determining module is used for determining the air-fuel ratio of the engine according to the high-temperature-resistant oxygen sensor data connected to the original exhaust pipe of the engine;
the electromagnetic valve opening module is used for opening an electromagnetic valve of a lean treatment system if the air-fuel ratio is lean, so that the original exhaust gas in the original exhaust pipe of the engine flows into the PNA module and the three-way catalyst in sequence;
and the electromagnetic valve closing module is used for closing an electromagnetic valve of the lean treatment system if the air-fuel ratio is rich, so that the original exhaust gas in the original exhaust pipe of the engine directly flows into the three-way catalyst.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the air-fuel ratio based vehicle exhaust gas treatment method according to any one of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute the air-fuel ratio based vehicle exhaust gas treatment method according to any one of the embodiments of the present invention.
According to the embodiment of the invention, the purification capacity of the post-treatment device is improved to the greatest extent by controlling the post-treatment strategy of the original exhaust of the engine in a staged manner and judging the air-fuel ratio of the original exhaust so as to adjust the catalysis mode; PNA modules are introduced in the lean burn post-treatment stage, and directional treatment is carried out according to the characteristic of more NOx emission in the lean burn state, so that the treatment efficiency of the original exhaust gas is effectively improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1A is a flow chart of an air-fuel ratio based automotive exhaust treatment method according to an embodiment of the present invention;
FIG. 1B is a flow chart of an aftertreatment strategy for phasing an engine bank according to an embodiment of the invention;
fig. 2 is a schematic structural view of an air-fuel ratio-based exhaust gas treatment device for an automobile according to still another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device implementing an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1A is a flowchart of an air-fuel ratio-based exhaust gas treatment method for an automobile, which is applicable to the situation of index decomposition of a catalytic process and staged improvement of efficiency of the catalytic process according to an embodiment of the present invention, and the method may be performed by an air-fuel ratio-based exhaust gas treatment device, which may be implemented in hardware and/or software, and the device may be configured in an electronic apparatus having corresponding data processing capabilities, such as a driving computer. As shown in fig. 1A, the method includes:
s110, determining the air-fuel ratio of the engine according to the high-temperature-resistant oxygen sensor data connected to the original exhaust pipe of the engine.
And S120, if the air-fuel ratio is lean, opening an electromagnetic valve of a lean-then-treatment system to enable the original exhaust gas in the original exhaust pipe of the engine to flow into the PNA module and the three-way catalyst in sequence.
And S130, if the air-fuel ratio is rich, closing a solenoid valve of a lean treatment system, and enabling the original exhaust gas in the original exhaust pipe of the engine to directly flow into a three-way catalyst.
When the electromagnetic valve is opened, the original exhaust gas firstly flows into the PNA module, flows out of the PNA module and then flows into the three-way catalyst; when the electromagnetic valve is closed, the original exhaust gas does not flow through the PNA (passive NOx adsorbed) module and directly flows into the three-way catalyst.
Specifically, the engine original exhaust pipe is connected with a Gao Wenyang sensor to judge the air-fuel ratio state of the original exhaust pipe according to Gao Wenyang sensor data, and the air-fuel ratio can be divided into lean and rich. The NOx emission of the engine can be increased sharply in a lean-burn state, and the lean-burn state is usually generated in a low-temperature cold start stage, at the moment, the PNA module has a very high treatment effect on the raw exhaust gas similar to the low-temperature lean-burn working condition, and the three-way catalyst has a poor catalytic effect. Therefore, the solenoid valve is opened during lean burn, so that the original exhaust gas flows into the three-way catalyst for continuous treatment after being fully treated by the PNA module. Under the rich condition, the PNA module is limited in treatment effect, the PNA module cannot effectively adsorb NOx in the original exhaust, the catalytic efficiency of the three-way catalyst is improved, the electromagnetic valve can be closed at the moment, and the original exhaust body can bypass the PNA module and directly flow into the three-way catalyst in a high-efficiency working state.
According to the embodiment of the invention, the purification capacity of the post-treatment device is improved to the greatest extent by controlling the post-treatment strategy of the original exhaust of the engine in a staged manner and judging the air-fuel ratio of the original exhaust so as to adjust the catalysis mode; PNA modules are introduced in the lean burn post-treatment stage, and directional treatment is carried out according to the characteristic of more NOx emission in the lean burn state, so that the treatment efficiency of the original exhaust gas is effectively improved.
Optionally, the PNA module is a low temperature NOx adsorber material; correspondingly, under the low-temperature state, the PNA module adsorbs NOx in the original exhaust; at high temperature, the PNA module desorbs adsorbed NOx.
Specifically, PNA is a low-temperature NOx adsorption material, pd/molecular sieves are generally adopted, the adsorption capacity to NOx is very good in a low-temperature state, and desorption can occur at a high temperature at the same time, so that the problem of fluctuation of the concentration of NOx in a dynamic adjustment aftertreatment system is solved.
Optionally, the lean burn includes low temperature lean and high temperature lean;
if the dilution is high Wen Xiran, the method further comprises, after opening the solenoid valve of the dilution and treatment system:
determining the oxygen storage and release state of oxygen storage materials in the three-way catalyst according to the oxygen sensor data connected to the rear end of the three-way catalyst;
and controlling the GPF or the throttle valve according to the oxygen storage and release state.
Specifically, referring to fig. 1B, during a cold start of the vehicle, the air-fuel ratio is usually lean at low temperature, and the PNA capability of treating the exhaust gas is in an optimal range. With the temperature rise of the engine, the low temperature is changed into high Wen Xiran, and at the moment, the treatment capability of PNA on the original exhaust gas is seriously reduced, NOx cannot be effectively adsorbed, and oxygen storage and release materials in the three-way catalyst and the opening degree of a throttle valve are required to be regulated and controlled.
Optionally, the controlling the GPF or the throttle according to the oxygen storage and release state includes:
if the oxygen storage and release state is an oxygen release state, controlling the opening degree of a throttle valve to be reduced;
and if the oxygen storage and release state is the oxygen storage state, controlling the GPF to actively regenerate.
Specifically, the oxygen sensor is connected to the rear end of the three-way catalyst to judge whether the oxygen storage and release material OSC is saturated, if so, the oxygen storage and release material OSC is judged to be in an oxygen storage state, and if not, the oxygen storage and release material OSC is judged to be in an oxygen release state. If the oxygen storage and release material is in an oxygen release state, a signal is output to a throttle opening control module to control the throttle opening to be reduced so as to reduce the air inflow of the engine. If the oxygen storage and release material is in an oxygen storage state, the oxygen storage and release material is in an oxygen storage process, the GPF regeneration oxygen demand is larger than the exhaust oxygen supply after post-treatment, and the GPF needs to be actively regenerated at the moment, so that the fuel consumption caused by GPF blockage is avoided from being greatly increased.
Optionally, after closing the solenoid valve of the lean aftertreatment system, the method further comprises:
determining the oxygen storage and release state of oxygen storage materials in the three-way catalyst according to the oxygen sensor data connected to the rear end of the three-way catalyst;
if the oxygen storage and release state is an oxygen release state, controlling GPF to be passively regenerated;
and if the oxygen storage and release state is an oxygen storage state, controlling the opening degree of the throttle valve to be increased.
Specifically, when the fuel is judged to be rich, the electromagnetic valve is closed, the PNA module is short-circuited, and the original exhaust gas of the engine directly flows into the three-way catalyst and does not flow through the PNA module. If the oxygen storage and release state is the oxygen storage state, the oxygen release process is ended, the catalyst is in a complete reduction state, a signal is output to the throttle valve control module, the opening degree of the throttle valve is controlled to be increased, and the air input is increased, so that the air-fuel ratio of the original exhaust of the engine is adjusted. If the oxygen storage and release material is judged to be in an oxygen storage state, the oxygen storage and release material is in an oxygen storage process at the moment, the GPF regeneration oxygen demand is smaller than the exhaust oxygen supply after post-treatment, and the GPF needs to be passively regenerated. By adjusting the working conditions, lean burn and rich burn are separately processed, so that the problem of difficult exhaust treatment caused by complex working conditions can be effectively solved. By combining with stricter exhaust standards of the future national VI I, the method can improve the full-working-condition treatment capacity of the engine exhaust aftertreatment system and prolong the service life of the current engine product.
Optionally, after determining the air-fuel ratio of the engine, the method further includes;
if the air-fuel ratio is lean, controlling the opening degree of a throttle valve to be reduced; if the air-fuel ratio is lean, the throttle opening is controlled to increase.
Specifically, in the lean combustion state, the throttle valve needs to be subjected to opening adjustment to regulate and control the air inflow, and the air inflow is reduced on the premise of properly sacrificing the dynamic property of the engine, so that the running state of the engine is adjusted from lean combustion to equivalence ratio combustion, and the opening adjustment degree needs to be determined by later stage bench calibration. Similarly, in the rich state, the throttle valve also needs to be subjected to opening adjustment to regulate the intake air amount, but contrary to lean, the intake air amount needs to be increased at this time, so that the operation state of the engine is adjusted from rich to equivalence ratio combustion, and the opening adjustment degree also needs to be determined by post stage calibration.
Fig. 2 is a schematic structural diagram of an exhaust treatment device for an automobile based on an air-fuel ratio according to still another embodiment of the present invention. As shown in fig. 2, the apparatus includes:
an air-fuel ratio determining module 210 for determining an air-fuel ratio of the engine based on the high temperature oxygen sensor data that is accessed to the engine's original exhaust pipe;
a solenoid valve opening module 220, configured to open a solenoid valve of a lean-then-treat system if the air-fuel ratio is lean, so that the exhaust gas in the original exhaust pipe of the engine flows into the PNA module and the three-way catalyst in sequence;
and a solenoid valve closing module 230 for closing a solenoid valve of a lean-then-treatment system if the air-fuel ratio is rich, so that the exhaust gas in the original exhaust pipe of the engine directly flows into the three-way catalyst.
The automobile exhaust treatment device based on the air-fuel ratio provided by the embodiment of the invention can execute the automobile exhaust treatment method based on the air-fuel ratio provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Optionally, the PNA module is a low temperature NOx adsorber material; corresponding to:
in a low temperature state, the PNA module adsorbs NOx in the original exhaust;
at high temperature, the PNA module desorbs adsorbed NOx.
Optionally, the lean burn includes low temperature lean and high temperature lean; the rarefaction is a high temperature rarefaction, and the device further comprises:
the first storage judging module is used for determining the oxygen storage state of oxygen storage materials in the three-way catalyst according to the oxygen sensor data connected to the rear end of the three-way catalyst;
the high Wen Xiran processing module is used for controlling the GPF or the throttle valve according to the oxygen storage and release state.
Optionally, the high Wen Xiran processing module is specifically configured to: if the oxygen storage and release state is an oxygen release state, controlling the opening degree of a throttle valve to be reduced; and if the oxygen storage and release state is the oxygen storage state, controlling the GPF to actively regenerate.
Optionally, the apparatus further includes:
the second storage judging module is used for determining the oxygen storage state of the oxygen storage material in the three-way catalyst according to the oxygen sensor data connected to the rear end of the three-way catalyst;
the oxygen enrichment and release treatment module is used for controlling the GPF to be passively regenerated if the oxygen storage and release state is an oxygen release state;
and the rich combustion oxygen storage processing module is used for controlling the opening degree of the throttle valve to be increased if the oxygen storage and release state is an oxygen storage state.
Optionally, the apparatus further includes:
an opening degree reducing module for controlling the opening degree of the throttle valve to be reduced if the air-fuel ratio is lean;
an opening increasing module for controlling the opening of the throttle valve to increase if the air-fuel ratio is lean
The further described air-fuel ratio based automobile exhaust treatment device can also execute the air-fuel ratio based automobile exhaust treatment method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Fig. 3 shows a schematic diagram of an electronic device 30 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 3, the electronic device 30 includes at least one processor 31, and a memory, such as a Read Only Memory (ROM) 32, a Random Access Memory (RAM) 33, etc., communicatively connected to the at least one processor 31, wherein the memory stores a computer program executable by the at least one processor, and the processor 31 can perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 32 or the computer program loaded from the storage unit 38 into the Random Access Memory (RAM) 33. In the RAM 33, various programs and data required for the operation of the electronic device 30 may also be stored. The processor 31, the ROM 32 and the RAM 33 are connected to each other via a bus 34. An input/output (I/O) interface 35 is also connected to bus 34.
Various components in electronic device 30 are connected to I/O interface 35, including: an input unit 36 such as a keyboard, a mouse, etc.; an output unit 37 such as various types of displays, speakers, and the like; a storage unit 38 such as a magnetic disk, an optical disk, or the like; and a communication unit 39 such as a network card, modem, wireless communication transceiver, etc. The communication unit 39 allows the electronic device 30 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 31 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 31 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 31 performs the various methods and processes described above, such as an automobile exhaust gas treatment method based on an air-fuel ratio.
In some embodiments, the air-fuel ratio based vehicle exhaust treatment method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as storage unit 38. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 30 via the ROM 32 and/or the communication unit 39. When the computer program is loaded into RAM 33 and executed by processor 31, one or more steps of the air-fuel ratio based vehicle exhaust gas treatment method described above may be performed. Alternatively, in other embodiments, processor 31 may be configured to perform the air-fuel ratio based vehicle exhaust treatment method in any other suitable manner (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of treating an exhaust gas of an automobile based on an air-fuel ratio, the method comprising:
determining the air-fuel ratio of the engine according to the high-temperature-resistant oxygen sensor data connected to the original exhaust pipe of the engine;
if the air-fuel ratio is lean, opening a solenoid valve of a lean-then-treatment system to enable the original exhaust tail gas in the original exhaust pipe of the engine to flow into the PNA module and the three-way catalyst in sequence;
if the air-fuel ratio is rich, closing a solenoid valve of a lean-then-treatment system, and enabling the original exhaust gas in the original exhaust pipe of the engine to directly flow into a three-way catalyst.
2. The method of claim 1, wherein the PNA module is a low temperature NOx adsorber material; corresponding to:
in a low temperature state, the PNA module adsorbs NOx in the original exhaust;
at high temperature, the PNA module desorbs adsorbed NOx.
3. The method of claim 2, wherein the lean burn comprises a low temperature lean and a high temperature lean;
if the dilution is high Wen Xiran, the method further comprises, after opening the solenoid valve of the dilution and treatment system:
determining the oxygen storage and release state of oxygen storage materials in the three-way catalyst according to the oxygen sensor data connected to the rear end of the three-way catalyst;
and controlling the GPF or the throttle valve according to the oxygen storage and release state.
4. A method according to claim 3, wherein said controlling a GPF or throttle based on said oxygen storage status comprises:
if the oxygen storage and release state is an oxygen release state, controlling the opening degree of a throttle valve to be reduced;
and if the oxygen storage and release state is the oxygen storage state, controlling the GPF to actively regenerate.
5. The method of claim 1, further comprising, after closing the solenoid valve of the lean aftertreatment system:
determining the oxygen storage and release state of oxygen storage materials in the three-way catalyst according to the oxygen sensor data connected to the rear end of the three-way catalyst;
if the oxygen storage and release state is an oxygen release state, controlling GPF to be passively regenerated;
and if the oxygen storage and release state is an oxygen storage state, controlling the opening degree of the throttle valve to be increased.
6. The method of claim 1, further comprising, after said determining an air-fuel ratio of the engine;
if the air-fuel ratio is lean, controlling the opening degree of a throttle valve to be reduced;
if the air-fuel ratio is lean, the throttle opening is controlled to increase.
7. An air-fuel ratio based automotive exhaust treatment device, the device comprising:
the air-fuel ratio determining module is used for determining the air-fuel ratio of the engine according to the high-temperature-resistant oxygen sensor data connected to the original exhaust pipe of the engine;
the electromagnetic valve opening module is used for opening an electromagnetic valve of a lean treatment system if the air-fuel ratio is lean, so that the original exhaust gas in the original exhaust pipe of the engine flows into the PNA module and the three-way catalyst in sequence;
and the electromagnetic valve closing module is used for closing an electromagnetic valve of the lean treatment system if the air-fuel ratio is rich, so that the original exhaust gas in the original exhaust pipe of the engine directly flows into the three-way catalyst.
8. The apparatus of claim 7, wherein the PNA module is a low temperature NOx adsorber material; corresponding to:
in a low temperature state, the PNA module adsorbs NOx in the original exhaust;
at high temperature, the PNA module desorbs adsorbed NOx.
9. An electronic device, the electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the air-fuel ratio based vehicle exhaust gas treatment method of any one of claims 1-6.
10. A computer readable storage medium storing computer instructions for causing a processor to execute the air-fuel ratio based vehicle exhaust gas treatment method according to any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311266865.8A CN117072291A (en) | 2023-09-27 | 2023-09-27 | Automobile exhaust treatment method, device, equipment and medium based on air-fuel ratio |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311266865.8A CN117072291A (en) | 2023-09-27 | 2023-09-27 | Automobile exhaust treatment method, device, equipment and medium based on air-fuel ratio |
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