CN114934833A - Post-processing system control method, system and storage medium - Google Patents

Abstract

The application provides a control method and a control system of an after-treatment system and a storage medium, wherein the after-treatment system comprises at least two SCR channels which are connected in parallel and at least two urea nozzles which are in one-to-one correspondence with the SCR channels, and the injection directions of the urea nozzles face to the corresponding SCR channels, and the control method is characterized by comprising the following steps of: acquiring working condition information of an engine; determining a urea demand of each SCR channel based on the working condition information; and respectively controlling the urea injection amount of the urea nozzles based on the urea demand. Through each SCR passageway in the many SCR passageways of independent control, improve exhaust-gas treatment's precision, promote the life of conversion efficiency, catalyst, make SCR multichannel design can nimble overall arrangement in the aftertreatment system when strengthening engine overall performance, practice thrift the cost.

Description

Post-processing system control method, system and storage medium

Technical Field

The present application relates to the field of automobiles, and in particular, to a method for controlling an aftertreatment system, and a storage medium.

Background

At present, six gas machines in China are required to meet the requirements of emission regulations, and the whole tail gas treatment generally adopts a DOC (diesel Oxidation catalyst), a DPF (diesel Particulate filter) and an SCR (selective Catalytic reduction) connected post-treatment structure, wherein the SCR working principle is to eliminate nitrogen oxides in exhaust gas by utilizing urea.

Therefore, how to independently control the multi-channel SCR to improve the accuracy and save the space becomes a technical problem to be solved urgently.

Disclosure of Invention

The method aims to solve the technical problem of how to independently control the multi-channel SCR so as to improve the precision and save the space. The invention provides a control method and device of a post-processing system, a storage medium and electronic equipment, which enable each branch of a multi-channel SCR to directly and independently operate, improve the precision and improve the overall performance of the post-processing system.

According to an aspect of an embodiment of the present application, there is provided an aftertreatment system control method, the aftertreatment system including at least two parallel SCR channels and at least two urea nozzles corresponding to the SCR channels in a one-to-one manner, and an injection direction of the urea nozzles being directed toward the corresponding SCR channels, the method including: acquiring working condition information of an engine; determining a urea demand of each SCR channel based on the working condition information; the urea injection amounts of the urea nozzles are respectively controlled based on the urea demand amounts.

Further, the determining the urea demand of each SCR channel based on the operating condition information comprises: determining exhaust emission information based on the operating condition information; determining an exhaust treatment requirement for each of the SCR channels based on the exhaust emission information; a urea demand for each of the SCRs is determined based on the exhaust treatment demand.

Further, a pressure regulating valve is arranged on at least one SCR channel, and the step of determining the urea demand of each SCR based on the working condition information comprises the following steps: determining the SCR channel required to be opened based on the information on the exhaust emission; a urea demand for each SCR channel is determined based on the exhaust emission information and the SCR channel property desired to be opened, respectively.

Further, the method also comprises the following steps: determining the opening degree of the SCR channel required to be opened based on the exhaust emission information; controlling the urea nozzles corresponding to the SCR channels to be started; and determining the urea demand of the current SCR channel based on the opening degree.

Further, the determining the SCR channel that needs to be opened based on the exhaust emission information includes: judging whether the exhaust emission requirement is greater than a preset emission requirement or not; and when the exhaust emission requirement is greater than a preset emission requirement, controlling the corresponding pressure regulating valve on the SCR channel to open.

Further, the determining the SCR channel required to be opened based on the exhaust emission information further includes: and when the exhaust emission requirement is less than or equal to the preset emission requirement, controlling the pressure regulating valve to be closed.

According to another aspect of the embodiments of the present application, an aftertreatment system is provided, which includes an SCR first passage, an SCR second passage, and two urea nozzles, where the SCR first passage and the SCR second passage are connected in parallel, and the two urea nozzles are disposed at inlets of the SCR first passage and the SCR second passage, and a control method of the aftertreatment system according to any one of the foregoing aspects.

Furthermore, the post-treatment system also comprises a pressure regulating valve which is arranged at the tail end of the SCR second channel and controls the opening of the SCR second channel.

Further, the size of the catalyst of at least one of the SCR channels is different from the size of the catalyst of the other SCR channels.

According to still another aspect of embodiments of the present application, there is provided a computer-readable storage medium having a computer program stored therein, wherein the computer program is configured to execute the aftertreatment system control method according to any one of the above when executed.

In the embodiment of the application, through setting up the urea nozzle with SCR passageway one-to-one, further be provided with the air-vent valve of control SCR passageway aperture, confirm urea nozzle injection volume and every SCR passageway aperture based on the current operating mode information of engine, and then can satisfy each SCR passageway in a plurality of SCR passageways of independent control, accomplish all SCR passageways of accurate control under different operating modes, improve exhaust-gas treatment's precision, promote conversion efficiency, the life of catalyst, make SCR multichannel design can nimble overall arrangement among the aftertreatment system when strengthening the engine overall performance, and the cost is saved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

FIG. 1 is a schematic diagram of a hardware environment for an aftertreatment system control method according to an embodiment of the invention;

FIG. 2 is a schematic flow chart diagram of a method of aftertreatment system control according to an embodiment of the application;

FIG. 3 is a schematic flow chart diagram of another aftertreatment system control method according to an embodiment of the application;

FIG. 4 is a schematic flow chart diagram of another aftertreatment system control method according to an embodiment of the application;

FIG. 5 is a schematic diagram of an aftertreatment system according to an embodiment of the application;

fig. 6 is a block diagram of an alternative electronic device according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or 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.

According to one aspect of an embodiment of the present application, there is provided an aftertreatment system control method. Alternatively, in this embodiment, the post-processing system control method may be applied to a hardware environment formed by the terminal 102 and the server 104 as shown in fig. 1. As shown in fig. 1, the server 104 is connected to the terminal 102 through a network, which may be used to provide services for the terminal or a client installed on the terminal, may be provided with a database on the server or separately from the server, may be used to provide data storage services for the server 104, and may be used to handle cloud services, and the network includes but is not limited to: the terminal 102 is not limited to a PC, a mobile phone, a tablet computer, a vehicle-mounted computer, a ship-mounted computer, etc. The post-processing system control method according to the embodiment of the present application may be executed by the server 104, the terminal 102, or both the server 104 and the terminal 102. The terminal 102 may execute the post-processing system control method according to the embodiment of the present application by a client installed thereon.

As described in the background art, the SCR system basically operates in such a manner that exhaust gas flows out of a turbocharger and enters an exhaust pipe, a urea injection unit mounted on the exhaust pipe injects a certain amount of urea aqueous solution into the exhaust pipe in a mist form, urea droplets undergo hydrolysis and pyrolysis reactions under the action of high-temperature exhaust gas to generate a required reducing agent ammonia (NH3), the ammonia (NH3) selectively reduces nitrogen oxides (NOx) into nitrogen (N2) under the action of a catalyst, and the engine exhaust gas has resistance pressure, so that the engine exhaust gas is not smooth when the engine back pressure rises, thereby affecting the dynamic performance of the engine. For reducing the influence that the back pressure brought, solve through the mode that sets up a plurality of SCR passageways among the prior art, however in the actual process because the unstability of gas flow, a plurality of SCR passageways distribute the air current inhomogeneous, corresponding when setting up the passageway need carry out spatial layout according to the setting of every catalyst, lead to integrated design spatial layout dumb, can't accomplish accurate control SCR exhaust-gas treatment process simultaneously. Based on the method, the inventor provides an aftertreatment system control method, wherein the aftertreatment system comprises at least two SCR channels which are connected in parallel and at least two urea nozzles which correspond to the SCR channels in a one-to-one mode, and the injection directions of the urea nozzles face the corresponding SCR channels.

Taking the post-processing system control method in the present embodiment executed by the terminal 102 and/or the server 104 as an example, fig. 2 is a schematic flow chart of an alternative post-processing system control method according to an embodiment of the present application, and for example, referring to fig. 2, the flow chart of the method may include the following steps:

s100, obtaining working condition information of the engine.

S200, determining the urea demand of each SCR channel based on the working condition information.

S300, controlling the urea injection amount of the urea nozzle respectively based on the urea demand.

Through the steps S100 to S300, the urea nozzles in one-to-one correspondence with the SCR channels are arranged, the injection quantity of each urea nozzle and the opening degree of each SCR channel are determined based on the current working condition information of the engine, each SCR channel in a plurality of SCR channels can be independently controlled, all the SCR channels can be accurately controlled under different working conditions, the accuracy of waste gas treatment is improved, the conversion efficiency is improved, the service life of a catalyst is prolonged, the overall performance of the engine is enhanced, meanwhile, the multi-channel SCR design in the post-treatment system can be flexibly distributed, and the cost is saved.

Through the technical scheme in the step S100, the working condition information of the engine is obtained, the working condition of the engine can comprise the rotating speed of the engine, the power of the engine and the like, the current automobile state can be obtained, and the optimal catalytic efficiency of the current exhaust gas treatment can be matched.

According to the technical scheme in the step S200, the urea demand of each SCR channel is determined based on the working condition information, the engine working conditions are different, the generated exhaust gas amount is different, and the corresponding SCR channels treat different exhaust gas amounts, so that the urea demand serving as the catalyst is adjusted according to the obtained working condition information to meet the optimal catalytic efficiency.

Through the technical scheme in the step S300, based on the urea demand quantity, the urea injection quantity of the urea nozzle is respectively controlled, the waste gas treatment quantity in each SCR channel is different, the urea nozzles correspondingly connected with each SCR channel are controlled, all SCR channels are further independently controlled, the post-treatment system is accurately controlled, the efficiency is improved, the service life of the catalyst is prolonged, and the overall performance of the engine is improved.

As an exemplary embodiment, determining the required amount of urea for each SCR channel by using the engine operating condition information is to obtain the amount of the reactant, urea is used as the catalyst, the required amount is determined according to the amount of the reactant, the reactant in the SCR channel is nitrogen oxide in the exhaust gas, and therefore the exhaust gas treatment information needs to be determined, for example, referring to fig. 3, the process of the method may include the following steps:

s201, determining exhaust emission information based on the working condition information.

S202, determining exhaust gas treatment requirements of each SCR channel based on the exhaust gas emission information.

S203, determining the urea demand of each SCR based on the exhaust treatment demand.

Through the technical solutions in the above steps S201 to S203, the current exhaust emission information of the engine is determined according to the current operating condition information of the engine, which may be the engine speed, the engine power, and the like, and the exhaust emission information includes the exhaust emission, the exhaust temperature, and the like, and according to the obtained exhaust emission information, the exhaust treatment requirements of all SCR channels, that is, the amount and the temperature of the treated exhaust, and by determining the amount of the reactant, the reactant temperature may obtain the catalyst mass with the optimal catalytic efficiency, that is, the required amount of urea, so that the reaction is performed under the optimal conditions.

As an exemplary embodiment, a pressure regulating valve is disposed on at least one of the SCR channels, the amount of exhaust gas discharged is different under different engine operating conditions, the exhaust gas to be treated by the SCR channels is different, and in order to satisfy more precise independent control of each of the multiple SCR channels, the pressure regulating valve is disposed to control the opening and closing of the SCR channels, and further to control the amount of exhaust gas passing through the SCR channels, that is, to control the amount of reactants in the catalytic reaction of the SCR, for example, as shown in fig. 4, a method for determining the urea demand of each SCR based on the operating condition information may include the following steps:

s211, determining the SCR channel required to be opened based on the exhaust emission information.

S212, determining the urea demand of each SCR channel respectively based on the exhaust emission information and the SCR channel attribute required to be started.

Through the technical scheme in above-mentioned step S211 to step S212, because need certain temperature in the catalytic reaction of SCR, under being less than certain operating mode condition, produced waste gas volume is not enough, and the heat is easily taken away to gas through a plurality of SCR passageways, leads to catalyst life to reduce scheduling problem, consequently according to the switching of every SCR passageway of operating mode independent control, the volume of the reactant waste gas is controlled simultaneously, and then the accurate reaction control who does.

As an exemplary embodiment, the method of independently controlling the reactions in all the SCR channels includes controlling the reactant, i.e., exhaust emission information, and the catalyst mass, i.e., the injection amount of the urea injection nozzle, and the method of separately controlling the urea injection amount of the urea injection nozzle based on the urea demand further includes: determining the opening degree of the SCR channel required to be opened based on the exhaust emission information; controlling the urea nozzles corresponding to the SCR channels to be started; and determining the urea demand of the current SCR channel based on the opening degree. According to the opening number and the opening degree of the SCR channels, the exhaust emission amount of reactants in the SCR channels can be controlled, the amount of a catalyst in catalytic reaction is determined according to the exhaust emission amount, and the catalyst is provided by the urea nozzle, so that the injection amount of the urea nozzle can be determined.

As an exemplary embodiment, the method of determining the SCR channel required to be opened based on the exhaust emission information includes: judging whether the exhaust emission requirement is greater than a preset emission requirement or not; when the exhaust emission requirement is larger than a preset emission requirement, controlling the corresponding pressure regulating valve on the SCR channel to open; and when the exhaust emission requirement is less than or equal to the preset emission requirement, controlling the pressure regulating valve to be closed. For example, in the double SCR channels, a pressure regulating valve is arranged in one SCR channel and is used as an auxiliary SCR channel, the other SCR channel is used as a main SCR channel, after the working condition of an engine is lower than a certain value, the temperature in the SCR channel is reduced due to the fact that the required exhaust gas emission amount affects the catalytic efficiency, the required exhaust gas emission amount is used as a preset emission requirement, whether the current exhaust gas emission requirement is larger than the preset emission requirement or not is detected, the catalytic efficiency is not affected when the required exhaust gas emission amount is larger than the preset emission requirement, therefore, the auxiliary SCR channel is opened, the catalytic efficiency is affected when the required exhaust gas emission amount is smaller than or equal to the preset emission requirement, and the auxiliary SCR channel is closed. And adjusting the injection quantity of the urea nozzle according to the state of the SCR channel at the moment, and controlling the injection quantity of the catalyst so as to accurately control the catalytic reaction.

According to another aspect of the embodiments of the present application, as shown in fig. 5, there is provided an aftertreatment system including an SCR first passage 01, an SCR second passage 02, and two urea nozzles 03, wherein the SCR first passage 01 and the SCR second passage 02 are connected in parallel, and the two urea nozzles 03 are disposed at inlets of the SCR first passage 01 and the SCR second passage 02; the pressure regulating valve 04 is arranged at the tail end of the SCR second channel 02 and is used for controlling the opening of the SCR second channel; the control method of the aftertreatment system further comprises the step of independently controlling each SCR channel by controlling the injection quantity of the two urea nozzles 03 and the opening degree of the pressure regulating valve 04 according to any one of the embodiments.

For example, during the operation of the control method on the aftertreatment system shown in fig. 5, the SCR first passage 01 serves as a main passage, the SCR second passage 02 serves as an auxiliary passage, and the size of the SCR catalyst of the SCR second passage 02 can be adjusted according to the treatment requirement and can be different from the size of the SCR first passage 01. According to the actual operating condition demand, the injection quantity of the two urea nozzles 03 is respectively adjusted, and the waste gas treatment demands under different operating conditions are met.

Furthermore, the opening degree of the pressure regulating valve 04 and the injection quantity of the urea nozzle 03 are adjusted according to different discharge working conditions.

Furthermore, in the aftertreatment system with multiple SCR channels, all SCR channels are relatively independent, and in the integrated design summary, the specifications of the catalyst can be designed by considering more space layout, so that the space during integration can be greatly optimized, and the size of the catalyst of at least one SCR channel in the SCR channels is different from the sizes of the catalysts of other SCR channels in the SCR channels.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required for the application.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (e.g., a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, an optical disk) and includes several instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the methods according to the embodiments of the present application.

According to yet another aspect of the embodiments of the present application, there is also provided an electronic device for implementing the above post-processing system control, which may be a server, a terminal, or a combination thereof.

Fig. 6 is a block diagram of an alternative electronic device according to an embodiment of the present invention, as shown in fig. 6, including a processor 602, a communication interface 604, a memory 606, and a communication bus 608, where the processor 602, the communication interface 604, and the memory 606 communicate with each other through the communication bus 608, where,

a memory 606 for storing computer programs;

the processor 602, when executing the computer program stored in the memory 606, implements the following steps:

acquiring working condition information of an engine;

determining a urea demand of each SCR channel based on the working condition information;

and respectively controlling the urea injection amount of the urea nozzles based on the urea demand.

Alternatively, in this embodiment, the communication bus may be a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.

The communication interface is used for communication between the electronic equipment and other equipment.

The memory may include RAM, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory. Alternatively, the memory may be at least one memory device located remotely from the aforementioned processor.

The processor may be a general-purpose processor, and may include but is not limited to: a CPU (Central Processing Unit), an NP (Network Processor), and the like; but also a DSP (Digital Signal Processing), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment is not described herein again.

It will be understood by those skilled in the art that the structure shown in fig. 6 is merely an illustration, and the device implementing the DOC emission content may be a terminal device, and the terminal device may be a terminal device such as a smart phone (e.g., an Android phone, an iOS phone, etc.), a tablet computer, a palm computer, a vehicle computer, a ship computer, and a Mobile Internet Device (MID), PAD, etc. Fig. 6 is a diagram illustrating a structure of the electronic device. For example, the terminal device may also include more or fewer components (e.g., network interfaces, display devices, etc.) than shown in FIG. 6, or have a different configuration than shown in FIG. 6.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by a program instructing hardware associated with the terminal device, where the program may be stored in a computer-readable storage medium, and the storage medium may include: flash disk, ROM, RAM, magnetic or optical disk, and the like.

According to still another aspect of an embodiment of the present application, there is also provided a storage medium. Alternatively, in the present embodiment, the storage medium may be a program code for executing the post-processing system control method.

Optionally, in this embodiment, the storage medium may be located on at least one of a plurality of network devices in a network shown in the above embodiment.

Optionally, in this embodiment, the storage medium is configured to store program code for performing the following steps:

acquiring working condition information of an engine;

determining a urea demand of each SCR channel based on the working condition information;

the urea injection amounts of the urea nozzles are respectively controlled based on the urea demand amounts.

Optionally, the specific example in this embodiment may refer to the example described in the above embodiment, which is not described again in this embodiment.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U disk, a ROM, a RAM, a removable hard disk, a magnetic disk, or an optical disk.

The above-mentioned serial numbers of the embodiments of the present application are merely for description, and do not represent the advantages and disadvantages of the embodiments.

The integrated unit in the above embodiments, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in the above computer-readable storage medium. Based on such understanding, the technical solutions of the present application, which are essential or part of the technical solutions contributing to the prior art, or all or part of the technical solutions, may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing one or more computer devices (which may be personal computers, servers, network devices, or the like) to execute all or part of the steps of the methods described in the embodiments of the present application.

In the embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed client may be implemented in other manners. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, and may also be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims (10)

1. An aftertreatment system control method, the aftertreatment system comprising at least two SCR channels connected in parallel and at least two urea nozzles corresponding to the SCR channels in a one-to-one mode, and the injection directions of the urea nozzles are towards the corresponding SCR channels, the method comprising the following steps:

acquiring working condition information of an engine;

determining a urea demand of each SCR channel based on the working condition information;

the urea injection amounts of the urea nozzles are respectively controlled based on the urea demand amounts.

2. The aftertreatment system control method of claim 1, wherein the determining a urea demand for each of the SCR channels based on the operating condition information comprises:

determining exhaust emission information based on the operating condition information;

determining an exhaust treatment requirement for each of the SCR channels based on the exhaust emission information;

a urea demand for each of the SCRs is determined based on the exhaust treatment demand.

3. The aftertreatment system control method of claim 1, wherein a pressure regulating valve is disposed on at least one of the SCR passages, and wherein determining a urea demand for each of the SCRs based on the operating condition information comprises:

determining the SCR channel required to be opened based on the information on the exhaust emission;

determining a urea demand for each SCR passage based on the exhaust emission information and the SCR passage property required to be opened, respectively.

4. The aftertreatment system control method of claim 3, further comprising:

determining the opening degree of the SCR channel required to be opened based on the exhaust emission information;

controlling the urea nozzles corresponding to the SCR channels to be started;

and determining the current urea demand of the SCR channel based on the opening degree.

5. The aftertreatment system control method of claim 3, wherein the determining the SCR channel required to be opened based on the exhaust emission information comprises:

judging whether the exhaust emission requirement is greater than a preset emission requirement or not;

and when the exhaust emission requirement is greater than a preset emission requirement, controlling the corresponding pressure regulating valve on the SCR channel to open.

6. The aftertreatment system control method of claim 3, wherein the determining the SCR channel required to be opened based on the exhaust emission information further comprises:

and when the exhaust emission requirement is less than or equal to the preset emission requirement, controlling the pressure regulating valve to be closed.

7. An aftertreatment system comprising an SCR first passage, an SCR second passage, and two urea nozzles, the SCR first passage and the SCR second passage being connected in parallel, the two urea nozzles being provided at inlets of the SCR first passage and the SCR second passage, further comprising an aftertreatment system control method according to any one of claims 1 to 6.

8. The aftertreatment system of claim 7, further comprising a pressure regulating valve disposed at an end of the SCR second channel to control an opening of the SCR second channel.

9. The aftertreatment system of claim 7, wherein at least one of the SCR channels has a catalyst that is a different size than catalysts of other of the SCR channels.

10. A computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the aftertreatment system control method according to any one of claims 1 to 6 when executed.

Images