CN115095410B

CN115095410B - Control method, control device and control system for tail gas treatment

Info

Publication number: CN115095410B
Application number: CN202210827758.7A
Authority: CN
Inventors: 张军; 葛浩; 杨金鹏
Original assignee: Weichai Power Co Ltd; Weifang Weichai Power Technology Co Ltd
Current assignee: Weichai Power Co Ltd; Weifang Weichai Power Technology Co Ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2023-11-17
Anticipated expiration: 2042-07-14
Also published as: CN115095410A

Abstract

The application provides a control method, a control device and a control system for tail gas treatment, wherein the method comprises the following steps: firstly, acquiring a first data set, a second data set and a third data set, wherein the second data set comprises a second temperature value and ammonia data, and the third data set at least comprises a first nitrogen-oxygen value and ammonia data; then, determining a first model ammonia storage value, a first ammonia storage setpoint, and a first nox value based at least on the first data set and the second data set; then, determining a first ammonia correction value according to the first ammonia storage value and the first ammonia storage set value of the first model; then, according to the first nitrogen oxide value and the third data set, determining whether the ammonia leakage value exceeds a preset threshold value, and determining a correction factor; and finally, determining a target ammonia set value at least according to the first ammonia correction value and the correction factor. The method ensures that whether ammonia leakage exists in tail gas treatment or not can be accurately judged, and ensures that the efficiency of tail gas treatment is higher.

Description

Control method, control device and control system for tail gas treatment

Technical Field

The application relates to the field of automobiles, in particular to a control method and device for tail gas treatment, a computer readable storage medium, a processor and a control system for tail gas treatment.

Background

SCR (Selective Catalytic Reduction ) in Diesel aftertreatment is responsible for environmentally harmful NO in exhaust gas _x Reduction to N ₂ But currently according to NO _x The control scheme of the sensor has the defects of low control efficiency and incapability of judging ammonia leakage due to cross sensitivity.

The above information disclosed in the background section is only for enhancement of understanding of the background art from the technology described herein and, therefore, may contain some information that does not form the prior art that is already known in the country to a person of ordinary skill in the art.

Disclosure of Invention

The application mainly aims to provide a control method for tail gas treatment, a device thereof, a computer readable storage medium, a processor and a control system for tail gas treatment, so as to solve the problem of lower SCR reaction efficiency caused by inaccurate ammonia amount in the prior art.

According to an aspect of the embodiment of the present application, there is provided a control method for exhaust gas treatment, which implements an exhaust gas treatment process through a connected first SCR reaction chamber and second SCR reaction chamber, the method comprising: acquiring a first data set, a second data set and a third data set, wherein the first data set comprises a first temperature value and an exhaust gas value, the first temperature value is the average temperature of the second SCR reaction chamber, the exhaust gas value is the mass flow of exhaust gas in the tail gas of a target automobile, the second data set comprises a second temperature value and ammonia data, the second temperature value is the gas temperature before entering the second SCR reaction chamber, the ammonia data is the ammonia flow of gas output by the first SCR reaction chamber, the third data set at least comprises a first nitrogen-oxygen value and the ammonia data, and the first nitrogen-oxygen value is the mass flow of nitrogen oxides of the tail gas of the target automobile after being processed by the first SCR reaction chamber and the second SCR reaction chamber; determining a first model ammonia storage value, a first ammonia storage set value and a first nitrogen oxide value according to at least the first data set and the second data set, wherein the first model ammonia storage value is the required ammonia amount obtained by simulating a reaction model of the second SCR reaction chamber, the first ammonia storage set value is the required ammonia amount obtained by calculating according to the first temperature value and the waste gas value, and the first nitrogen oxide value is the mass flow of nitrogen oxide of the gas treated by the second SCR reaction chamber obtained by simulating a reaction model of the second SCR reaction chamber; determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value; determining whether an ammonia leakage value exceeds a predetermined threshold value according to the first nitrogen oxide value and the third data set, and determining a correction factor; and determining a target ammonia set value at least according to the first ammonia correction value and the correction factor, and controlling the ammonia amount entering the first SCR reaction chamber to be the target ammonia set value.

Optionally, the first nox value and the third data set form a new third data set, and determining the correction factor according to the first nox value and the third data set includes: acquiring a third corresponding relation, wherein the third corresponding relation is the relation between the third data set and the correction factor; and determining the correction factor according to the third data set and the third corresponding relation.

Optionally, the second data set further includes the exhaust gas value, a second nitrogen oxide value, and an ammonia gas value, where the second nitrogen oxide value is a mass flow rate of nitrogen oxide of the gas after the treatment of the first SCR reaction chamber obtained by using a reaction model of the first SCR reaction chamber, and the ammonia gas value is a mass flow rate of ammonia gas after the treatment of the first SCR reaction chamber obtained by using a reaction model of the first SCR reaction chamber.

Optionally, determining a first model ammonia storage value, a first ammonia storage setpoint, and a first nitrogen oxide value based at least on the first data set and the second data set, comprising: acquiring a first corresponding relation and a first corresponding relation group, wherein the first corresponding relation is a relation between the first data group and the first ammonia storage set value, the first corresponding relation group is a corresponding relation between the second data group and the first model ammonia storage value, a first efficiency value and the first nitrogen oxide value, and the first efficiency value is the simulation reaction efficiency of the second SCR reaction chamber; determining the first ammonia storage set point according to the first data set and the first corresponding relation; and determining the first model ammonia storage value, the first efficiency value and the first nitrogen oxide value according to the second data set and the first corresponding relation set.

Optionally, determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value includes: calculating a difference value between the first model ammonia storage value and the first ammonia storage set value to obtain a first difference value; and determining the first ammonia correction value and a first set correction coefficient according to a first difference value and a second corresponding relation, wherein the second corresponding relation is the corresponding relation among the first difference value, the first ammonia correction value and the first set correction coefficient.

Optionally, before determining the target ammonia gas setting value according to at least the first ammonia gas correction value and the correction factor, the method further includes: acquiring a fourth data set, wherein the fourth data set comprises a nitrogen-containing oxide flow, a third temperature value, the first efficiency value and a second efficiency value, the third temperature value is the average value of the gas temperature before entering the first SCR reaction chamber and the gas temperature after being processed by the second SCR reaction chamber, the nitrogen-containing oxide flow is the flow of nitrogen-containing oxide in the tail gas of the target automobile, and the second efficiency value is the simulation reaction efficiency of the first SCR reaction chamber; and determining a target ammonia gas base value according to the fourth data set and a fourth corresponding relation, wherein the fourth corresponding relation is a relation between the fourth data set and the target ammonia gas base value.

Optionally, determining the target ammonia gas setting value at least according to the first ammonia gas correction value and the correction factor includes: acquiring a second ammonia correction value and an ammonia increase value, wherein the second ammonia correction value is determined according to the monitoring parameter of the first SCR reaction chamber and the reaction model of the first SCR reaction chamber, and the ammonia increase value is determined according to the reaction model of the first SCR reaction chamber; calculating the sum of the first ammonia correction value, the second ammonia correction value, the target ammonia base value and the ammonia added value to obtain a preliminary ammonia set value; and calculating the product of the preliminary ammonia gas set value and the correction factor to obtain the target ammonia gas set value.

Optionally, obtaining the second ammonia correction value and the ammonia increment value includes: obtaining a fifth data set and a sixth data set, wherein the fifth data set comprises a fourth temperature value, the exhaust gas value, a first set adjustment coefficient and the first set correction coefficient, the fourth temperature value is the average temperature of the first SCR reaction chamber, the first set adjustment coefficient is used for being determined according to a reaction model of the first SCR reaction chamber, the sixth data set comprises the exhaust gas value, a second nitrogen-oxygen value, a fifth temperature value and the first correction coefficient, the second nitrogen-oxygen value is the mass flow rate of nitrogen-containing oxide of the tail gas of the target automobile before being processed by the first SCR reaction chamber and the second SCR reaction chamber, the first correction coefficient is determined according to the reaction model of the first SCR reaction chamber, and the fifth temperature value is the gas temperature before being processed by the first SCR reaction chamber; determining a second ammonia storage set value, a second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia value according to the fifth data set and the sixth data set, wherein the second model ammonia storage value is the demand of ammonia obtained by simulation of a reaction model of the first SCR reaction chamber, and the second ammonia storage set value is the demand of ammonia obtained by calculation according to at least the fourth temperature value and the exhaust gas value; determining the second ammonia correction value according to the second ammonia storage set value and the second model ammonia storage value; and determining the ammonia gas increasing value, the first set adjustment coefficient and the first correction coefficient according to the ammonia gas value and the ammonia gas data.

Optionally, determining a second ammonia storage setpoint, a second model ammonia storage value, the second efficiency value, the second nitrogen oxide value, and the ammonia value according to the fifth data set and the sixth data set, including: obtaining a fifth corresponding relation and a second corresponding relation group, wherein the fifth corresponding relation is a corresponding relation between the fifth data group and the second ammonia storage set value, and the second corresponding relation group is a corresponding relation between the sixth data group and the second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia gas value; determining the second ammonia storage set point according to the fifth data set and the fifth corresponding relation; and determining the ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia gas value of the second model according to the sixth data set and the second corresponding relation set.

Optionally, determining the second ammonia correction value according to the second ammonia storage setting value and the second model ammonia storage value includes: calculating a difference value between the second ammonia storage set value and the second model ammonia storage value to obtain a second difference value; and determining the second ammonia correction value according to a second difference value and a sixth corresponding relation, wherein the sixth corresponding relation is the corresponding relation between the second difference value and the second ammonia correction value.

Optionally, determining the ammonia gas increment value, the first setting adjustment coefficient and the first correction coefficient according to the ammonia gas value and the ammonia gas data includes: acquiring a third corresponding relation group, wherein the third corresponding relation group is a corresponding relation among the ammonia value, the ammonia data, the ammonia added value, the first set adjustment coefficient and the first correction coefficient; and determining the ammonia gas increasing value, the first setting adjustment coefficient and the first correction coefficient according to the ammonia gas value, the ammonia gas data and the third corresponding relation group.

According to another aspect of the embodiment of the present invention, there is further provided a control device for treating exhaust gas, where an exhaust gas treatment process is implemented by a first SCR reaction chamber and a second SCR reaction chamber that are connected, the device includes a first acquisition unit, a first determination unit, a second determination unit, a third determination unit, and a fourth determination unit, where the first acquisition unit is configured to acquire a first data set, a second data set, and a third data set, where the first data set includes a first temperature value and an exhaust gas value, the first temperature value is an average temperature of the second SCR reaction chamber, the exhaust gas value is a mass flow rate of exhaust gas in an exhaust gas of a target automobile, the second data set includes a second temperature value and ammonia data, the second temperature value is a gas temperature before entering the second SCR reaction chamber, the ammonia data is an ammonia flow rate of gas output from the first SCR reaction chamber, and the third data set includes at least a first nitrogen-oxygen value and the ammonia data, and the first nitrogen-oxygen value is a target nitrogen-oxygen-containing mass flow rate of exhaust gas after passing through the first SCR reaction chamber and the second SCR reaction chamber; the first determining unit is configured to determine, at least according to the first data set and the second data set, a first model ammonia storage value, a first ammonia storage set value and a first nitrogen oxide value, where the first model ammonia storage value is a required amount of ammonia gas obtained by simulation using a reaction model of the second SCR reaction chamber, the first ammonia storage set value is a required amount of ammonia gas obtained by calculation according to the first temperature value and the exhaust gas value, and the first nitrogen oxide value is a mass flow rate of nitrogen oxide of gas processed by the second SCR reaction chamber obtained by simulation using a reaction model of the second SCR reaction chamber; the second determining unit is used for determining a first ammonia correction value according to the first ammonia storage value of the first model and the first ammonia storage set value; the third determining unit is used for determining whether the ammonia leakage value exceeds a preset threshold value according to the first nitrogen oxide value and the third data set, and determining a correction factor; the fourth determining unit is used for determining a target ammonia set value at least according to the first ammonia correction value and the correction factor, and controlling the ammonia amount entering the first SCR reaction chamber to be the target ammonia set value.

According to yet another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program is for executing any one of the methods.

According to yet another aspect of an embodiment of the present invention, there is further provided a processor, where the processor is configured to execute a program, and where the program executes any of the methods.

According to yet another aspect of the embodiment of the present invention, there is further provided a control system for exhaust gas treatment, the system including an SCR group, a first SCR temperature sensor group, an ammonia gas sensor, a first nitrogen oxide sensor, and a controller, wherein the SCR group includes a first SCR reaction chamber and a second SCR reaction chamber connected, and the SCR group is used for implementing an exhaust gas treatment process; the first SCR temperature sensor group comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is respectively connected with the first SCR reaction chamber and the second SCR reaction chamber, the second temperature sensor is connected with one end of the second SCR reaction chamber far away from the first SCR reaction chamber, the first SCR temperature sensor group is used for providing a first temperature value and a second temperature value, the first temperature value is the average temperature of the second SCR reaction chamber, and the second temperature value is the gas temperature before entering the second SCR reaction chamber; the ammonia sensor is positioned between the first SCR reaction chamber and the second SCR reaction chamber, and is used for providing ammonia data, wherein the ammonia data is the ammonia flow rate of gas output by the first SCR reaction chamber; the first nitrogen oxide sensor is connected with one end, far away from the first temperature sensor, of the second temperature sensor, and is used for providing a first nitrogen oxide value, wherein the first nitrogen oxide value is the mass flow of nitrogen oxide of the tail gas of the target automobile after being treated by the first SCR reaction chamber and the second SCR reaction chamber; the controller is configured to receive detection data of the first SCR temperature sensor group, the ammonia gas sensor, and the first nitrogen oxide sensor, and the controller is configured to perform any one of the methods.

Optionally, the system further comprises a third temperature sensor and a second nitrogen oxide sensor, wherein the third temperature sensor is connected with one end of the first SCR reaction chamber far away from the first temperature sensor, the third temperature sensor is connected with the first temperature sensor, the second SCR temperature sensor is used for providing a fourth temperature value and a fifth temperature value, the fourth temperature value is the average temperature of the first SCR reaction chamber, and the fifth temperature value is the temperature before passing through the first SCR reaction chamber; the second nitrogen oxide sensor is connected with one end, close to the first SCR reaction chamber, of the third temperature sensor, and is used for providing a second nitrogen oxide value, wherein the second nitrogen oxide value is the mass flow of nitrogen-containing oxides of the tail gas of the target automobile before being processed by the first SCR reaction chamber and the second SCR reaction chamber.

In the method for controlling the exhaust gas treatment, first, a first data set, a second data set and a third data set are acquired, wherein the first data set comprises a first temperature value and an exhaust gas value, the first temperature value is the average temperature of the second SCR reaction chamber, the exhaust gas value is the mass flow of exhaust gas in the exhaust gas of the target automobile, the second data set comprises a second temperature value and ammonia gas data, the second temperature value is the gas temperature before entering the second SCR reaction chamber, the ammonia gas data is the ammonia gas flow of gas output by the first SCR reaction chamber, the third data set at least comprises a first nitrogen-oxygen value and the ammonia gas data, and the first nitrogen-oxygen value is the mass flow of nitrogen oxides of the exhaust gas of the target automobile after the first SCR reaction chamber and the second SCR reaction chamber are treated; then, determining a first model ammonia storage value, a first ammonia storage set value and a first nitrogen oxide value according to at least the first data set and the second data set, wherein the first model ammonia storage value is the required ammonia amount obtained by simulation by adopting a reaction model of the second SCR reaction chamber, the first ammonia storage set value is the required ammonia amount obtained by calculation according to the first temperature value and the exhaust gas value, and the first nitrogen oxide value is the mass flow rate of nitrogen oxide of the gas processed by the second SCR reaction chamber obtained by simulation by adopting a reaction model of the second SCR reaction chamber; then, determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value; then, according to the first nitrogen oxide value and the third data set, determining whether the ammonia leakage value exceeds a preset threshold value, and determining a correction factor; and finally, determining a target ammonia set value at least according to the first ammonia correction value and the correction factor, and controlling the ammonia amount entering the first SCR reaction chamber to be the target ammonia set value. Compared with the problem of lower SCR reaction efficiency caused by inaccurate ammonia amount in the prior art, the control method for tail gas treatment of the application ensures that whether the ammonia leakage value exceeds the preset threshold value or not is determined according to the first data set, the second data set and the third data set, the first model ammonia storage value and the first ammonia storage set value are determined according to the first data set and the second data set, the first ammonia correction value is determined according to the first model ammonia storage value and the first ammonia storage set value, the ammonia correction value related to the second SCR reaction chamber is obtained, the ammonia leakage value is determined according to the first nitrogen oxide value and the third data set, whether the ammonia leakage value exceeds the preset threshold value or not is determined according to a plurality of parameters in the third data set, the problem of ammonia leakage in tail gas treatment can be more accurately judged, the target ammonia set value is determined according to at least the first ammonia correction value and the correction factor, the target ammonia conversion efficiency is ensured to be more accurate according to the first ammonia storage value and the first ammonia storage set value, the target ammonia conversion efficiency is ensured to be lower than the target ammonia conversion efficiency is ensured to be higher in the SCR reaction chamber, and the problem of the prior art is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a flow diagram of a control method for exhaust treatment according to an embodiment of the application;

FIG. 2 shows a flow chart of control of exhaust treatment according to an embodiment of the application;

FIG. 3 shows a schematic view of a control device for exhaust treatment according to an embodiment of the application;

FIG. 4 shows a schematic diagram of a control system for exhaust treatment according to an embodiment of the application.

Wherein the above figures include the following reference numerals:

60. a first data set; 70. a second data set; 80. a third data set; 90. a first model ammonia storage value; 100. a first ammonia storage setpoint; 110. a first nitrogen oxide value; 120. a first ammonia correction value; 130. a correction factor; 140. a target ammonia gas set value; 150. a first efficiency value; 160. a first difference; 170. setting a correction coefficient; 180. a fourth data set; 181. nitrogen oxide-containing flow rate; 182. a third temperature value; 183. a second efficiency value; 190. a target ammonia radical value; 200. a second ammonia correction value; 210. increasing the value of ammonia; 220. preparing an ammonia set value; 230. a fifth data set; 231. a fourth temperature value; 232. setting an adjustment coefficient; 240. a sixth data set; 241. a second nitrogen oxygen value; 242. a fifth temperature value; 243. a first correction coefficient; 250. a second ammonia storage setpoint; 260. a second model ammonia storage value; 270. a second difference; 280. an SCR group; 281. a first SCR reaction chamber; 282. a second SCR reaction chamber; 290. a first SCR temperature sensor group; 291. a first temperature sensor; 292. a second temperature sensor; 300. an ammonia sensor; 320. a first nitrogen oxide sensor; 330. a controller; 340. a third temperature sensor; 350. a second nitrogen oxide sensor; 360. a second SCR temperature sensor group; 370. an engine; 380. CCDOC; 390. CCSCR; 400. DOC; 410. a DPF; 420. a first MAP module; 430. a second MAP module; 440. a first kinetic model; 450. a third MAP module; 460. a fourth MAP module; 470. a fifth MAP module; 480. a second kinetic model; 490. a sixth MAP module; 500. a seventh MAP module; 510. ASC; 520. an ammonia setting module; 601. a first temperature value; 602. an exhaust gas value; 701. a second temperature value; 702. ammonia data; 703. a second nitrogen oxide value; 704. ammonia gas value; 801. a first nitrogen oxygen value.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application 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 application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application 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 in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," 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 or inherent to such process, method, article, or apparatus.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Furthermore, in the description and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.

As described in the background art, in order to solve the problem that the SCR reaction efficiency is low due to inaccurate ammonia amount in the prior art, in an exemplary embodiment of the present application, a control method for exhaust gas treatment, a device thereof, a computer readable storage medium, a processor, and a control system for exhaust gas treatment are provided.

According to the embodiment of the application, a control method for tail gas treatment is provided, and the tail gas treatment process is realized through a first SCR reaction chamber and a second SCR reaction chamber which are connected.

Fig. 1 is a flow chart of a control method of exhaust gas treatment according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:

step S101, as shown in fig. 2, a first data set 60, a second data set 70, and a third data set 80 are acquired, wherein the first data set 60 includes a first temperature value 601 and an exhaust gas value 602, the first temperature value 601 is an average temperature of the second SCR reaction chamber, the exhaust gas value 602 is a mass flow rate of exhaust gas in exhaust gas of a target automobile, the second data set 70 includes a second temperature value 701 and ammonia data 702, the second temperature value 701 is a gas temperature before entering the second SCR reaction chamber, the ammonia data 702 is an ammonia flow rate of gas output from the first SCR reaction chamber, the third data set 80 includes at least a first nitrogen-oxygen value 801 and the ammonia data 702, and the first nitrogen-oxygen value 801 is a mass flow rate of nitrogen oxides of the target automobile exhaust gas after being treated by the first SCR reaction chamber and the second SCR reaction chamber;

Step S102, as shown in fig. 2, of determining a first model ammonia storage value 90, a first ammonia storage set value 100 and a first nitrogen oxide value 110 based on at least the first data set 60 and the second data set 70, wherein the first model ammonia storage value 90 is a required amount of ammonia gas obtained by simulation using a reaction model of the second SCR reaction chamber, the first ammonia storage set value 100 is a required amount of ammonia gas calculated based on the first temperature value 601 and the exhaust gas value 602, and the first nitrogen oxide value 110 is a mass flow rate of nitrogen oxide of the gas processed by the second SCR reaction chamber obtained by simulation using a reaction model of the second SCR reaction chamber;

step S103, as shown in FIG. 2, determining a first ammonia correction value 120 according to the first model ammonia storage value 90 and the first ammonia storage set value 100;

step S104, as shown in FIG. 2, according to the first NOx value 110 and the third data set 80, determining whether the ammonia leakage value exceeds a predetermined threshold value, and determining a correction factor 130;

in step S105, as shown in fig. 2, a target ammonia gas set value 140 is determined at least according to the first ammonia gas correction value 120 and the correction factor 130, and the amount of ammonia gas entering the first SCR reaction chamber is controlled to be the target ammonia gas set value 140.

In the exhaust gas treatment control method, first, a first data set, a second data set and a third data set are acquired, wherein the first data set includes a first temperature value and an exhaust gas value, the first temperature value is an average temperature of the second SCR reaction chamber, the exhaust gas value is a mass flow rate of exhaust gas in exhaust gas of a target automobile, the second data set includes a second temperature value and ammonia gas data, the second temperature value is a gas temperature before entering the second SCR reaction chamber, the ammonia gas data is an ammonia gas flow rate of gas output by the first SCR reaction chamber, the third data set includes at least a first nitrogen-oxygen value and the ammonia gas data, and the first nitrogen-oxygen value is a mass flow rate of nitrogen oxides of exhaust gas of the target automobile after being treated by the first SCR reaction chamber and the second SCR reaction chamber; then, determining a first model ammonia storage value, a first ammonia storage set value and a first nitrogen oxide value according to at least the first data set and the second data set, wherein the first model ammonia storage value is the required ammonia gas amount obtained by simulation by using a reaction model of the second SCR reaction chamber, the first ammonia storage set value is the required ammonia gas amount obtained by calculation according to the first temperature value and the exhaust gas value, and the first nitrogen oxide value is the mass flow rate of nitrogen oxide of the gas processed by the second SCR reaction chamber obtained by simulation by using a reaction model of the second SCR reaction chamber; then, determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value; then, according to the first nitrogen oxide value and the third data set, determining whether the ammonia leakage value exceeds a preset threshold value, and determining a correction factor; and finally, determining a target ammonia set value at least according to the first ammonia correction value and the correction factor, and controlling the ammonia amount entering the first SCR reaction chamber to be the target ammonia set value. Compared with the problem of lower SCR reaction efficiency caused by inaccurate ammonia amount in the prior art, the control method for treating the tail gas of the application has the advantages that the first data set, the second data set and the third data set are obtained, the ammonia storage value of the first model and the first ammonia storage set value are determined according to the first data set and the second data set, the first ammonia correction value is determined according to the ammonia storage value of the first model and the first ammonia storage set value, the ammonia correction value related to the second SCR reaction chamber is obtained, whether the ammonia leakage value exceeds the preset threshold value is determined according to the first nitrogen oxide value and the third data set, whether the ammonia leakage problem exists in the tail gas treatment is ensured, the target ammonia set value is determined according to at least the first ammonia correction value and the correction factor, the ammonia conversion efficiency of the second SCR reaction chamber is ensured to be higher than the target ammonia conversion efficiency determined according to the first ammonia storage value and the correction factor, the ammonia leakage value exceeds the preset threshold value is ensured, and the ammonia leakage problem is ensured to be more accurate according to a plurality of parameters in the third data set, the problem of the tail gas treatment is solved, and the ammonia leakage efficiency of the target ammonia is ensured to be higher than the target ammonia conversion efficiency is ensured.

Specifically, the first temperature value is a mean value of a temperature of an input port and a temperature of an output port of the second SCR reaction chamber.

According to a specific embodiment of the present application, the first nox value and the third data set form a new third data set, and determining the correction factor according to the first nox value and the third data set includes: as shown in fig. 2, a third correspondence is obtained, where the third correspondence is a relationship between the third data set 80 and the correction factor 130; the correction factor 130 is determined based on the third data set 80 and the third correspondence. The correction factor is determined by acquiring the corresponding relation between the third data set and the correction factor, namely the third corresponding relation, and combining the third corresponding relation according to the third data set, so that the accuracy of the correction factor is ensured to be higher, the accuracy of the target ammonia set value determined according to the correction factor is ensured to be higher, the conversion efficiency of the first SCR reaction chamber and the second reaction chamber is further ensured to be higher, and the efficiency of the tail gas treatment is further ensured to be higher.

Specifically, as shown in fig. 2, the third correspondence is implemented by a first MAP (an association container of STL for providing one-to-one data processing capability) module 420.

In a specific embodiment, the third corresponding relationship is determined according to various parameters and actual conditions, and of course, the third corresponding relationship may also be adjusted according to specific conditions, so that the third corresponding relationship is more accurate.

Specifically, the correction factor is calculated according to the ammonia leakage condition.

In order to further ensure the higher efficiency of the exhaust gas treatment, according to another embodiment of the present application, as shown in fig. 2, the second data set 70 further includes the exhaust gas value 602, a second nitrogen oxide value 703, and an ammonia gas value 704, where the second nitrogen oxide value 703 is a mass flow rate of nitrogen-containing oxide of the gas treated by the first SCR reaction chamber obtained by using the reaction model simulation of the first SCR reaction chamber, and the ammonia gas value 704 is a mass flow rate of ammonia gas treated by the first SCR reaction chamber obtained by using the reaction model simulation of the first SCR reaction chamber. The second data set further comprises the exhaust gas value, the second nitrogen oxide value and the ammonia gas value, so that the first model ammonia storage value, the first ammonia storage set value and the first nitrogen oxide value which are determined according to the second data set are more in line with actual conditions, the accuracy of the first ammonia correction value determined according to the first model ammonia storage value and the first ammonia storage set value is ensured to be higher, the accuracy of the ammonia leakage value and the correction factor determined according to the first nitrogen oxide value is ensured to be higher, whether ammonia leakage can be accurately judged further, the accuracy of the target ammonia gas set value is further ensured to be higher, and the efficiency of tail gas treatment is further ensured to be higher.

According to yet another embodiment of the present application, determining a first model ammonia storage value, a first ammonia storage setpoint, and a first nox value based at least on the first data set and the second data set comprises: as shown in fig. 2, a first correspondence and a first correspondence group are obtained, where the first correspondence is a relationship between the first data set 60 and the first ammonia storage set value 100, the first correspondence group is a correspondence between the second data set 70 and the first model ammonia storage value 90, a first efficiency value 150, and the first nox value 110, and the first efficiency value 150 is a simulated reaction efficiency of the second SCR reaction chamber; determining the first ammonia storage setting 100 based on the first data set 60 and the first correspondence; the first model ammonia storage value 90, the first efficiency value 150, and the first nox value 110 are determined based on the second data set 70 and the first correspondence set. The first ammonia storage set value is determined according to the first data set and the first corresponding relation set, the first ammonia storage set value is determined according to the first corresponding relation preset in advance, the accuracy of the first ammonia storage set value is guaranteed to be higher, the first model ammonia storage value, the first efficiency value and the first nitrogen oxide value are determined according to the second data set and the first corresponding relation set, the first model ammonia storage value, the first efficiency value and the first nitrogen oxide value are determined according to the first corresponding relation set preset in advance, the accuracy of the first model ammonia storage value, the first efficiency value and the first nitrogen oxide value is further guaranteed to be higher, and the accuracy of the target ammonia set value determined according to the first model ammonia storage value is further guaranteed to be higher, so that the efficiency of the treatment of the tail gas is further guaranteed to be higher.

Specifically, as shown in fig. 2, the first correspondence is implemented by the second MAP module 430, and the first correspondence group is implemented by the first dynamics model 440.

In a specific embodiment, the first correspondence and the first correspondence group are determined together according to various parameters and actual conditions, and of course, the first correspondence and the first correspondence group may be adjusted according to specific actual conditions, so that the first correspondence and the first correspondence group are more accurate.

According to one embodiment of the present application, determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value includes: as shown in fig. 2, calculating a difference between the first model ammonia storage value 90 and the first ammonia storage setting value 100 to obtain a first difference 160; the first ammonia correction value 120 and the first set correction coefficient 170 are determined according to a first difference 160 and a second correspondence relationship, where the second correspondence relationship is a correspondence relationship among the first difference 160, the first ammonia correction value 120, and the first set correction coefficient 170. The difference between the first model ammonia storage value and the first ammonia storage set value is calculated firstly, so that the first difference determined by actual parameter determination and analog calculation can be obtained, and then the first ammonia correction value and the first setting correction coefficient are determined according to the first difference and the second corresponding relation, so that the accuracy of the first ammonia correction value and the first ammonia correction coefficient is higher, the accuracy of the target ammonia set value determined according to the first ammonia correction value is higher, the reduction reaction of tail gas treatment determined according to the target ammonia set value is more thorough, and the SCR reaction efficiency is higher.

Specifically, as shown in fig. 2, the second correspondence relationship is implemented by the third MAP module 450.

In a specific embodiment, the second corresponding relationship is determined according to various parameters and actual conditions, and can be adjusted in real time, so that the second corresponding relationship can more accurately reflect the corresponding relationship among the first difference value, the first ammonia correction value and the first set correction coefficient.

In order to further ensure that the efficiency of the exhaust gas treatment is high, according to another embodiment of the present application, before determining the target ammonia gas set point at least according to the first ammonia gas correction value and the correction factor, the method further includes: as shown in fig. 2, a fourth data set 180 is acquired, where the fourth data set 180 includes a flow 181 of nitrogen-containing oxide, a third temperature value 182, the first efficiency value 150, and a second efficiency value 183, the third temperature value 182 is a mean value of a gas temperature before entering the first SCR reaction chamber and a gas temperature after being processed by the second SCR reaction chamber, the flow 181 of nitrogen-containing oxide is a flow of nitrogen-containing oxide in the exhaust gas of the target automobile, and the second efficiency value 183 is a simulated reaction efficiency of the first SCR reaction chamber; a target ammonia gas radical value 190 is determined based on the fourth data set 180 and a fourth correspondence relationship between the fourth data set 180 and the target ammonia gas radical value 190. The target ammonia radical value is determined according to the fourth data set and the fourth corresponding relation, so that the target ammonia radical value is determined according to each monitoring parameter in the fourth data set and the reaction efficiency of a plurality of SCR reaction chambers, the accuracy of the target ammonia radical value is higher, and the accuracy of the target ammonia set value determined according to the target ammonia radical value is further guaranteed to be higher.

Specifically, the flow rate of the nitrogen-containing oxide is determined based on the first nitrogen-oxygen value and the exhaust gas value.

The first efficiency value and the second efficiency value may be used to determine that the common efficiency of the first SCR reaction chamber and the second SCR reaction chamber is η=1- (1- η) ₁ )×(1-η ₂ ) Wherein eta ₁ For the first efficiency value, η ₂ For the second efficiencyValues.

In a specific embodiment, as shown in fig. 2, the fourth corresponding relationship is implemented by the fourth MAP module 460, and of course, the fourth corresponding relationship may be adjusted according to the actual situation of the vehicle.

In order to further ensure that the accuracy of the target ammonia gas setting value is high, so that the efficiency of the exhaust gas treatment is high, according to a further embodiment of the present application, determining the target ammonia gas setting value at least according to the first ammonia gas correction value and the correction factor includes: as shown in fig. 2, a second ammonia correction value 200 and an ammonia increase value 210 are obtained, wherein the second ammonia correction value 200 is determined according to the monitoring parameter of the first SCR reaction chamber and the reaction model of the first SCR reaction chamber, and the ammonia increase value 210 is determined according to the reaction model of the first SCR reaction chamber; calculating the sum of the first ammonia correction value 120, the second ammonia correction value 200, the target ammonia base value 190 and the ammonia increment value 210 to obtain a preliminary ammonia setting value 220; the product of the preliminary ammonia gas setpoint 220 and the correction factor 130 is calculated to obtain the target ammonia gas setpoint 140. The second ammonia correction value representing the first SCR reaction chamber is obtained, the ammonia increase value determined according to the reaction model of the first SCR reaction chamber is obtained, and then the sum of the first ammonia correction value, the second ammonia correction value, the target ammonia base value and the ammonia increase value is calculated, so that the obtained prepared ammonia set value is determined by considering various monitoring parameters, the first SCR reaction chamber and various conditions of the second SCR reaction chamber, the higher accuracy of the prepared ammonia set value is ensured, the product of the prepared ammonia set value and the correction factor is calculated, the target ammonia set value is obtained, and the higher accuracy of the target ammonia set value is further ensured, so that the efficiency of tail gas treatment influenced by the target ammonia set value is higher.

In order to further ensure that the efficiency of the exhaust gas treatment is high, according to a specific embodiment of the present application, obtaining the second ammonia correction value and the ammonia increment value includes: as shown in fig. 2, a fifth data set 230 and a sixth data set 240 are acquired, wherein the fifth data set 230 includes a fourth temperature value 231, the exhaust gas value 602, a first set adjustment coefficient 232, and the first set correction coefficient 170, the fourth temperature value 231 is an average temperature of the first SCR reaction chamber, the first set adjustment coefficient 232 is determined according to a reaction model of the first SCR reaction chamber, the sixth data set 240 includes the exhaust gas value 602, a second nitrogen-oxygen value 241, a fifth temperature value 242, and a first correction coefficient 243, the second nitrogen-oxygen value 241 is a mass flow rate of nitrogen-containing oxide in the exhaust gas of the target vehicle before being processed by the first SCR reaction chamber and the second SCR reaction chamber, the first correction coefficient 243 is determined according to a reaction model of the first SCR reaction chamber, and the fifth temperature value 242 is a gas temperature before being processed by the first SCR reaction chamber; determining a second ammonia storage set value 250, a second model ammonia storage value 260, the second efficiency value 183, the second nox value 703, and the ammonia value 704 based on the fifth data set 230 and the sixth data set 240, wherein the second model ammonia storage value 260 is a demand for ammonia gas simulated using a reaction model of the first SCR reaction chamber, and the second ammonia storage set value 250 is a demand for ammonia gas calculated based on at least the fourth temperature value 231 and the exhaust gas value 602; determining the second ammonia correction value 200 based on the second ammonia storage setpoint 250 and the second model ammonia storage value 260; based on the ammonia value 704 and the ammonia data 702, the ammonia increment value 210, the first setting adjustment coefficient 232, and the first correction coefficient 243 are determined. The second ammonia storage set value, the second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia value are determined according to the fifth data set and the sixth data set, the second ammonia storage correction value is determined according to the second ammonia storage set value and the second model ammonia storage value, the second ammonia storage correction value is ensured to be determined according to the actual parameters and the model of the first SCR reaction chamber, the accuracy of the second ammonia storage correction value is ensured to be higher, and the ammonia addition value, the first setting adjustment coefficient and the first correction coefficient are determined according to the ammonia value and the ammonia data, so that closed-loop control is realized by the first correction coefficient and the first setting adjustment coefficient, the accuracy of the target ammonia set value which is determined later is further ensured to be higher, and the efficiency of the treatment of the tail gas is further ensured to be higher.

Specifically, the first setting correction coefficient in the fifth data set is determined according to the corresponding relation of the second SCR reaction chamber, so that closed loop control is achieved for each parameter of the first SCR reaction chamber and each parameter of the second SCR reaction chamber, the accuracy of each obtained parameter is further guaranteed to be higher, so that the efficiency of the SCR reaction is higher, in addition, the second nitrogen oxide value and the ammonia value determined according to the fifth data set and the sixth data set are also used for inputting parameters of the second SCR reaction chamber, and likewise, closed loop control is achieved, so that the accuracy of the obtained target ammonia set value is further guaranteed to be higher due to the mutual influence of the first SCR reaction chamber and the second SCR reaction chamber.

In a specific embodiment, the ammonia data adaptive control performs closed-loop correction on the target value of the ammonia data according to the model ammonia data of the dynamics model of the first SCR reaction chamber.

According to another embodiment of the present application, determining a second ammonia storage setpoint, a second model ammonia storage value, the second efficiency value, the second nox value, and the ammonia gas value based on the fifth data set and the sixth data set includes: as shown in fig. 2, a fifth correspondence between the fifth data set 230 and the second ammonia storage set value 250 and a second correspondence group between the sixth data set 240 and the second model ammonia storage value 260, the second efficiency value 183, the second nox value 703, and the ammonia gas value 704 are obtained; determining the second ammonia storage setting 250 based on the fifth data set 230 and the fifth correspondence; the second model ammonia storage value 260, the second efficiency value 183, the second nox value 703, and the ammonia gas value 704 are determined based on the sixth data set 240 and the second correspondence set. The second ammonia storage set value is determined according to the fifth corresponding relation and the second corresponding relation group, the second ammonia storage set value is determined according to the fifth data combination, the second ammonia storage set value is determined according to the fifth corresponding relation and various parameters, the accuracy of the second ammonia storage set value is guaranteed to be higher, and the second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia value are determined according to the sixth data combination and the second corresponding relation group, so that the accuracy of the obtained second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia value is higher, and the accuracy of the obtained target ammonia set value is further guaranteed to be higher, so that the efficiency of tail gas treatment is higher.

Specifically, as shown in fig. 2, the fifth correspondence is implemented by the fifth MAP module 470, the second correspondence group is implemented by the second dynamics model 480, and of course, the fifth correspondence and the second correspondence group may be adjusted according to actual situations.

According to still another embodiment of the present application, determining the second ammonia correction value according to the second ammonia storage set value and the second model ammonia storage value includes: as shown in fig. 2, a second difference 270 is obtained by calculating a difference between the second ammonia storage value 250 and the second model ammonia storage value 260; and determining the second ammonia correction value 200 according to a second difference 270 and a sixth correspondence relationship, wherein the sixth correspondence relationship is a correspondence relationship between the second difference 270 and the second ammonia correction value 200. Calculating the difference between the ammonia storage value of the second model and the second ammonia storage set value to obtain the second difference determined by actual parameter determination and analog calculation, and determining the second ammonia correction value according to the second difference and the sixth corresponding relation to ensure that the accuracy of the second ammonia correction value is higher, further ensure that the accuracy of the target ammonia set value determined according to the second ammonia correction value is higher, ensure that the reduction reaction of the tail gas treatment determined according to the target ammonia set value is more thorough, and further ensure that the SCR reaction efficiency is higher.

Specifically, as shown in fig. 2, the sixth correspondence is implemented by a sixth MAP module 490, which determines the second ammonia correction value based on a closed-loop manner, and of course, the sixth correspondence may be adjusted according to actual situations.

According to a specific embodiment of the present application, determining the ammonia gas increment value, the first setting adjustment coefficient, and the first correction coefficient according to the ammonia gas value and the ammonia gas data includes: as shown in fig. 2, a third correspondence group is obtained, where the third correspondence group is a correspondence between the ammonia value 704 and the ammonia data 702, and the ammonia added value 210, the first set adjustment coefficient 232, and the first correction coefficient 243; the ammonia gas increasing value 210, the first setting adjustment coefficient 232, and the first correction coefficient 243 are determined based on the ammonia gas value 704, the ammonia gas data 702, and the third correspondence group. The third corresponding relation group is obtained, and the ammonia gas increasing value, the first setting adjustment coefficient and the first correction coefficient are determined according to the ammonia gas value, the ammonia gas data and the third corresponding relation group, so that the obtained ammonia gas increasing value, the obtained first setting adjustment coefficient and the obtained first correction coefficient are higher in accuracy, closed-loop control is realized by the first setting adjustment coefficient and the obtained first correction coefficient, the accuracy of the obtained target ammonia gas set value is higher, and the efficiency of tail gas treatment is further guaranteed to be higher.

Specifically, as shown in fig. 2, the third corresponding relation group is implemented by the seventh MAP module 500, and of course, the third corresponding relation group may be adjusted according to practical situations.

In a specific embodiment, the SCR is a selective catalytic reducer, and aims at NO in tail gas emission of diesel vehicles _x Is one of (a)The treatment equipment sprays reducing agent ammonia or urea under the action of the catalyst to lead NO in the tail gas _x Reduction to N ₂ And H ₂ O to complete the tail gas treatment process.

In addition, each correction value is calculated by the ammonia data and the reaction model of the first SCR reaction chamber and the second SCR reaction chamber, thereby improving NH ₃ And meanwhile, through correction of the ammonia data on the reaction model, the consistency of the chemical reaction of the reaction model and the chemical reaction of an actual SCR reaction chamber is higher, whether ammonia leaks or not is judged according to the ammonia data, and the reliability of a judgment result is improved.

The embodiment of the application also provides a control device for tail gas treatment, which realizes the tail gas treatment process through the connected first SCR reaction chamber and second SCR reaction chamber, and the control device for tail gas treatment can be used for executing the control method for tail gas treatment provided by the embodiment of the application. The following describes a control device for tail gas treatment provided by an embodiment of the present application.

Fig. 3 is a schematic view of a control device for exhaust gas treatment according to an embodiment of the present application. As shown in fig. 3, the apparatus includes a first acquiring unit 10, a first determining unit 20, a second determining unit 30, a third determining unit 40, and a fourth determining unit 50, where the first acquiring unit 10 is configured to acquire a first data set, a second data set, and a third data set, where the first data set includes a first temperature value and an exhaust gas value, the first temperature value is an average temperature of the second SCR reaction chamber, the exhaust gas value is a mass flow rate of exhaust gas in an exhaust gas of a target automobile, the second data set includes a second temperature value and ammonia data, the second temperature value is a gas temperature before entering the second SCR reaction chamber, the ammonia data is an ammonia flow rate of gas output from the first SCR reaction chamber, the third data set includes at least a first nitrogen-oxygen value and the ammonia data, and the first nitrogen-oxygen value is a mass flow rate of nitrogen oxide of the exhaust gas of the target automobile after being treated by the first SCR reaction chamber and the second SCR reaction chamber; the first determining unit 20 is configured to determine, based on at least the first data set and the second data set, a first model ammonia storage value, which is a required amount of ammonia gas simulated by a reaction model of the second SCR reaction chamber, a first ammonia storage set value, which is a required amount of ammonia gas calculated based on the first temperature value and the exhaust gas value, and a first nitrogen oxide value, which is a mass flow rate of nitrogen oxide of the gas processed by the second SCR reaction chamber simulated by a reaction model of the second SCR reaction chamber; the second determining unit 30 is configured to determine a first ammonia correction value according to the first ammonia storage value and the first ammonia storage set value; the third determining unit 40 is configured to determine whether the ammonia leakage value exceeds a predetermined threshold value, and determine a correction factor, based on the first nox value and the third data set; the fourth determining unit 50 is configured to determine a target ammonia gas set value based on at least the first ammonia gas correction value and the correction factor, and control an amount of ammonia gas entering the first SCR reaction chamber to be the target ammonia gas set value.

In the exhaust gas treatment control device, a first data set, a second data set and a third data set are acquired through the first acquisition unit, wherein the first data set includes a first temperature value and an exhaust gas value, the first temperature value is an average temperature of the second SCR reaction chamber, the exhaust gas value is a mass flow rate of exhaust gas in exhaust gas of a target automobile, the second data set includes a second temperature value and ammonia data, the second temperature value is a gas temperature before entering the second SCR reaction chamber, the ammonia data is an ammonia flow rate of gas output by the first SCR reaction chamber, the third data set includes at least a first nitrogen-oxygen value and the ammonia data, and the first nitrogen-oxygen value is a mass flow rate of nitrogen oxides of exhaust gas of the target automobile after being treated by the first SCR reaction chamber and the second SCR reaction chamber; determining, by the first determining unit, a first model ammonia storage value, which is a required amount of ammonia gas simulated by a reaction model of the second SCR reaction chamber, a first ammonia storage set value, which is a required amount of ammonia gas calculated from the first temperature value and the exhaust gas value, and a first nitrogen oxide value, which is a mass flow rate of nitrogen oxide of the gas processed by the second SCR reaction chamber simulated by a reaction model of the second SCR reaction chamber, based on at least the first data set and the second data set; determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value by the second determining unit; determining, by the third determining unit, whether the ammonia leakage value exceeds a predetermined threshold value according to the first nox value and the third data set, and determining a correction factor; and determining a target ammonia gas set value through the fourth determination unit at least according to the first ammonia gas correction value and the correction factor, and controlling the ammonia gas amount entering the first SCR reaction chamber to be the target ammonia gas set value. Compared with the problem of lower SCR reaction efficiency caused by inaccurate ammonia amount in the prior art, the control device for treating the tail gas of the application obtains the first data set, the second data set and the third data set, determines the first model ammonia storage value and the first ammonia storage set value according to the first data set and the second data set, determines the first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value, obtains the ammonia correction value related to the second SCR reaction chamber, determines whether the ammonia leakage value exceeds the preset threshold according to the first nitrogen oxide value and the third data set, ensures that whether the ammonia leakage problem exists in the tail gas treatment according to a plurality of parameters in the third data set, determines the target ammonia set value according to at least the first ammonia correction value and the correction factor, ensures that the target ammonia storage value determined according to at least the first ammonia storage value and the correction factor is more accurate, ensures that the ammonia gas is more effective in the reaction chamber due to the low ammonia conversion efficiency of the SCR reaction chamber, and solves the problem that the ammonia leakage value is more accurate in the first reaction chamber due to the low ammonia conversion efficiency.

According to a specific embodiment of the present application, the first nox value and the third data set form a new third data set, and the third determining unit includes a first obtaining module and a first determining module, where the first obtaining module is configured to obtain a third correspondence, and the third correspondence is a relationship between the third data set and the correction factor; the first determining module is configured to determine the correction factor according to the third data set and the third correspondence. The correction factor is determined by acquiring the corresponding relation between the third data set and the correction factor, namely the third corresponding relation, and combining the third corresponding relation according to the third data set, so that the accuracy of the correction factor is ensured to be higher, the accuracy of the target ammonia set value determined according to the correction factor is ensured to be higher, the conversion efficiency of the first SCR reaction chamber and the second reaction chamber is further ensured to be higher, and the efficiency of the tail gas treatment is further ensured to be higher.

Specifically, as shown in fig. 2, the third correspondence relationship is implemented by the first MAP module 420.

In order to further ensure that the efficiency of the exhaust gas treatment is high, according to another embodiment of the present application, the second data set further includes the exhaust gas value, a second nitrogen oxide value, and an ammonia gas value, where the second nitrogen oxide value is a mass flow rate of nitrogen-containing oxide of the gas treated by the first SCR reaction chamber obtained by using the reaction model of the first SCR reaction chamber, and the ammonia gas value is a mass flow rate of ammonia gas treated by the first SCR reaction chamber obtained by using the reaction model of the first SCR reaction chamber. The second data set further comprises the exhaust gas value, the second nitrogen oxide value and the ammonia gas value, so that the first model ammonia storage value, the first ammonia storage set value and the first nitrogen oxide value which are determined according to the second data set are more in line with actual conditions, the accuracy of the first ammonia correction value determined according to the first model ammonia storage value and the first ammonia storage set value is ensured to be higher, the accuracy of the ammonia leakage value and the correction factor determined according to the first nitrogen oxide value is ensured to be higher, whether ammonia leakage can be accurately judged further, the accuracy of the target ammonia gas set value is further ensured to be higher, and the efficiency of tail gas treatment is further ensured to be higher.

According to still another specific embodiment of the present application, the first determining unit includes a second acquiring module, a second determining module, and a third determining module, where the second acquiring module is configured to acquire a first correspondence and a first correspondence group, where the first correspondence is a relationship between the first data group and the first ammonia storage set value, the first correspondence group is a correspondence between the second data group and the first model ammonia storage value, a first efficiency value, and the first nitrogen oxide value, and the first efficiency value is a simulated reaction efficiency of the second SCR reaction chamber; the second determining module is configured to determine the first ammonia storage setting value according to the first data set and the first correspondence; the third determining module is configured to determine the first model ammonia storage value, the first efficiency value, and the first nox value according to the second data set and the first correspondence set. The first ammonia storage set value is determined according to the first data set and the first corresponding relation set, the first ammonia storage set value is determined according to the first corresponding relation preset in advance, the accuracy of the first ammonia storage set value is guaranteed to be higher, the first model ammonia storage value, the first efficiency value and the first nitrogen oxide value are determined according to the second data set and the first corresponding relation set, the first model ammonia storage value, the first efficiency value and the first nitrogen oxide value are determined according to the first corresponding relation set preset in advance, the accuracy of the first model ammonia storage value, the first efficiency value and the first nitrogen oxide value is further guaranteed to be higher, and the accuracy of the target ammonia set value determined according to the first model ammonia storage value is further guaranteed to be higher, so that the efficiency of the treatment of the tail gas is further guaranteed to be higher.

According to a specific embodiment of the present application, the second determining unit includes a first calculating module and a fourth determining module, where the first calculating module is configured to calculate a difference between the first model ammonia storage value and the first ammonia storage set value to obtain a first difference; the fourth determining module is configured to determine the first ammonia correction value and a first set correction coefficient according to a first difference value and a second correspondence relationship, where the second correspondence relationship is a correspondence relationship among the first difference value, the first ammonia correction value and the first set correction coefficient. The difference between the first model ammonia storage value and the first ammonia storage set value is calculated firstly, so that the first difference determined by actual parameter determination and analog calculation can be obtained, and then the first ammonia correction value and the first setting correction coefficient are determined according to the first difference and the second corresponding relation, so that the accuracy of the first ammonia correction value and the first ammonia correction coefficient is higher, the accuracy of the target ammonia set value determined according to the first ammonia correction value is higher, the reduction reaction of tail gas treatment determined according to the target ammonia set value is more thorough, and the SCR reaction efficiency is higher.

In order to further ensure that the efficiency of the exhaust gas treatment is high, according to another specific embodiment of the present application, the method further includes a second obtaining unit and a fifth determining unit, where the second obtaining unit is configured to obtain, before determining a target ammonia set value at least according to the first ammonia correction value and the correction factor, a fourth data set including a flow rate of nitrogen-containing oxide, a third temperature value, the first efficiency value and a second efficiency value, where the third temperature value is a mean value of a temperature of the gas before entering the first SCR reaction chamber and a temperature of the gas after being treated in the second SCR reaction chamber, the flow rate of nitrogen-containing oxide is a flow rate of nitrogen-containing oxide in the exhaust gas of the target automobile, and the second efficiency value is a simulated reaction efficiency of the first SCR reaction chamber; the fifth determining unit is configured to determine a target ammonia gas base value according to the fourth data set and a fourth correspondence relationship between the fourth data set and the target ammonia gas base value. The target ammonia radical value is determined according to the fourth data set and the fourth corresponding relation, so that the target ammonia radical value is determined according to each monitoring parameter in the fourth data set and the reaction efficiency of a plurality of SCR reaction chambers, the accuracy of the target ammonia radical value is higher, and the accuracy of the target ammonia set value determined according to the target ammonia radical value is further guaranteed to be higher.

The first efficiency value and the second efficiency value may be used to determine that the common efficiency of the first SCR reaction chamber and the second SCR reaction chamber is η=1- (1- η) ₁ )×(1-η ₂ ) Wherein eta ₁ For the first efficiency value, η ₂ Is the second efficiency value.

In order to further ensure that the accuracy of the target ammonia gas set value is high, according to still another specific embodiment of the present application, the fourth determining unit includes a third obtaining module, a second calculating module, and a third calculating module, where the third obtaining module is configured to obtain a second ammonia gas correction value and an ammonia gas increase value, where the second ammonia gas correction value is determined according to the monitoring parameter of the first SCR reaction chamber and the reaction model of the first SCR reaction chamber, and the ammonia gas increase value is determined according to the reaction model of the first SCR reaction chamber; the second calculation module is used for calculating the sum of the first ammonia correction value, the second ammonia correction value, the target ammonia base value and the ammonia added value to obtain a preliminary ammonia set value; the third calculation module is configured to calculate a product of the preliminary ammonia gas setting value and the correction factor to obtain the target ammonia gas setting value. The second ammonia correction value representing the first SCR reaction chamber is obtained, the ammonia increase value determined according to the reaction model of the first SCR reaction chamber is obtained, and then the sum of the first ammonia correction value, the second ammonia correction value, the target ammonia base value and the ammonia increase value is calculated, so that the obtained prepared ammonia set value is determined by considering various monitoring parameters, the first SCR reaction chamber and various conditions of the second SCR reaction chamber, the higher accuracy of the prepared ammonia set value is ensured, the product of the prepared ammonia set value and the correction factor is calculated, the target ammonia set value is obtained, and the higher accuracy of the target ammonia set value is further ensured, so that the efficiency of tail gas treatment influenced by the target ammonia set value is higher.

In order to further ensure that the efficiency of the exhaust gas treatment is high, according to a specific embodiment of the present application, the third acquisition module includes an acquisition sub-module, a first determination sub-module, a second determination sub-module, and a third determination sub-module, where the acquisition sub-module is configured to acquire a fifth data set and a sixth data set, the fifth data set includes a fourth temperature value, the exhaust gas value, a first setting adjustment coefficient, and the first setting correction coefficient, the fourth temperature value is an average temperature of the first SCR reaction chamber, the first setting adjustment coefficient is configured to be determined according to a reaction model of the first SCR reaction chamber, the sixth data set includes the exhaust gas value, a second nitrogen-oxygen value, a fifth temperature value, and a first correction coefficient, the second nitrogen-oxygen value is a mass oxidation model of the exhaust gas of the target vehicle before being treated in the first SCR reaction chamber and the second SCR reaction chamber, and the first correction coefficient is a mass oxidation model of the exhaust gas of the target vehicle before being treated in the first SCR reaction chamber, and the fifth temperature is a first temperature model of the first SCR reaction chamber; the first determining submodule is configured to determine a second ammonia storage set value, a second model ammonia storage value, the second efficiency value, the second nitrogen oxide value, and the ammonia value according to the fifth data set and the sixth data set, where the second model ammonia storage value is a required amount of ammonia simulated by using a reaction model of the first SCR reaction chamber, and the second ammonia storage set value is a required amount of ammonia calculated according to at least a fourth temperature value and the exhaust gas value; the second determining submodule is used for determining the second ammonia correction value according to the second ammonia storage set value and the second model ammonia storage value; the third determination submodule is used for determining the ammonia gas increasing value, the first setting adjustment coefficient and the first correction coefficient according to the ammonia gas value and the ammonia gas data. The second ammonia storage set value, the second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia value are determined according to the fifth data set and the sixth data set, the second ammonia storage correction value is determined according to the second ammonia storage set value and the second model ammonia storage value, the second ammonia storage correction value is ensured to be determined according to the actual parameters and the model of the first SCR reaction chamber, the accuracy of the second ammonia storage correction value is ensured to be higher, and the ammonia addition value, the first setting adjustment coefficient and the first correction coefficient are determined according to the ammonia value and the ammonia data, so that closed-loop control is realized by the first correction coefficient and the first setting adjustment coefficient, the accuracy of the target ammonia set value which is determined later is further ensured to be higher, and the efficiency of the treatment of the tail gas is further ensured to be higher.

According to another embodiment of the present application, the first determining submodule is configured to obtain a fifth correspondence and a second correspondence group, where the fifth correspondence is a correspondence between the fifth data set and the second ammonia storage set value, and the second correspondence group is a correspondence between the sixth data set and the second model ammonia storage value, the second efficiency value, the second nox value, and the ammonia gas value; determining the second ammonia storage setting value according to the fifth data set and the fifth corresponding relation; and determining the ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia gas value of the second model according to the sixth data set and the second corresponding relation set. The second ammonia storage set value is determined according to the fifth corresponding relation and the second corresponding relation group, the second ammonia storage set value is determined according to the fifth data combination, the second ammonia storage set value is determined according to the fifth corresponding relation and various parameters, the accuracy of the second ammonia storage set value is guaranteed to be higher, and the second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia value are determined according to the sixth data combination and the second corresponding relation group, so that the accuracy of the obtained second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia value is higher, and the accuracy of the obtained target ammonia set value is further guaranteed to be higher, so that the efficiency of tail gas treatment is higher.

According to another embodiment of the present application, the second determining submodule is configured to calculate a difference between the second ammonia storage set value and the second model ammonia storage value to obtain a second difference; and determining the second ammonia correction value according to a second difference value and a sixth corresponding relation, wherein the sixth corresponding relation is the corresponding relation between the second difference value and the second ammonia correction value. Calculating the difference between the ammonia storage value of the second model and the second ammonia storage set value to obtain the second difference determined by actual parameter determination and analog calculation, and determining the second ammonia correction value according to the second difference and the sixth corresponding relation to ensure that the accuracy of the second ammonia correction value is higher, further ensure that the accuracy of the target ammonia set value determined according to the second ammonia correction value is higher, ensure that the reduction reaction of the tail gas treatment determined according to the target ammonia set value is more thorough, and further ensure that the SCR reaction efficiency is higher.

According to a specific embodiment of the present application, the third determining submodule is configured to obtain a third corresponding relation set, where the third corresponding relation set is a corresponding relation between the ammonia value and the ammonia data, and the ammonia added value, the first set adjustment coefficient, and the first correction coefficient; and determining the ammonia gas increasing value, the first setting adjustment coefficient and the first correction coefficient according to the ammonia gas value, the ammonia gas data and the third corresponding relation group. The third corresponding relation group is obtained, and the ammonia gas increasing value, the first setting adjustment coefficient and the first correction coefficient are determined according to the ammonia gas value, the ammonia gas data and the third corresponding relation group, so that the obtained ammonia gas increasing value, the obtained first setting adjustment coefficient and the obtained first correction coefficient are higher in accuracy, closed-loop control is realized by the first setting adjustment coefficient and the obtained first correction coefficient, the accuracy of the obtained target ammonia gas set value is higher, and the efficiency of tail gas treatment is further guaranteed to be higher.

In a specific embodiment, the SCR is a selective catalytic reducer, and aims at NO in tail gas emission of diesel vehicles _x Under the action of catalyst, reducing agent ammonia or urea is sprayed into the tail gas to make NO in the tail gas _x Reduction to N ₂ And H ₂ O to complete the tail gas treatment process.

The exhaust gas treatment control device includes a processor and a memory, wherein the first acquisition unit, the first determination unit, the second determination unit, the third determination unit, the fourth determination unit, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The inner core can be provided with one or more than one, and the problem of lower SCR reaction efficiency caused by inaccurate ammonia amount in the prior art is solved by adjusting the inner core parameters.

The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.

An embodiment of the present invention provides a computer-readable storage medium having stored thereon a program that, when executed by a processor, implements the above-described exhaust gas treatment control method.

The embodiment of the invention provides a processor, which is used for running a program, wherein the control method for tail gas treatment is executed when the program runs.

The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes at least the following steps when executing the program:

step S101, a first data set, a second data set and a third data set are obtained, wherein the first data set comprises a first temperature value and an exhaust gas value, the first temperature value is the average temperature of the second SCR reaction chamber, the exhaust gas value is the mass flow rate of exhaust gas in the tail gas of the target automobile, the second data set comprises a second temperature value and ammonia data, the second temperature value is the gas temperature before entering the second SCR reaction chamber, the ammonia data is the ammonia flow rate of gas output by the first SCR reaction chamber, the third data set at least comprises a first nitrogen-oxygen value and the ammonia data, and the first nitrogen-oxygen value is the mass flow rate of nitrogen oxides of the tail gas of the target automobile after being processed by the first SCR reaction chamber and the second SCR reaction chamber;

Step S102, determining a first model ammonia storage value, a first ammonia storage set value and a first nitrogen oxide value according to at least the first data set and the second data set, wherein the first model ammonia storage value is the required ammonia amount obtained by simulation by using a reaction model of the second SCR reaction chamber, the first ammonia storage set value is the required ammonia amount obtained by calculation according to the first temperature value and the exhaust gas value, and the first nitrogen oxide value is the mass flow rate of nitrogen oxide of the gas processed by the second SCR reaction chamber obtained by simulation by using a reaction model of the second SCR reaction chamber;

step S103, determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value;

step S104, determining whether the ammonia leakage value exceeds a preset threshold value according to the first nitrogen oxide value and the third data set, and determining a correction factor;

step S105, determining a target ammonia set value at least according to the first ammonia correction value and the correction factor, and controlling the ammonia amount entering the first SCR reaction chamber to be the target ammonia set value.

The device herein may be a server, PC, PAD, cell phone, etc.

The application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with at least the following method steps:

According to another exemplary embodiment of the present application, there is also provided a control system for exhaust gas treatment, as shown in fig. 4, the system includes an SCR group 280, a first SCR temperature sensor group 290, an ammonia sensor 300, a first nox sensor 320, and a controller 330, wherein the SCR group 280 includes a first SCR reaction chamber 281 and a second SCR reaction chamber 282 connected, and the SCR group 280 is used to implement an exhaust gas treatment process; the first SCR temperature sensor group 290 includes a first temperature sensor 291 and a second temperature sensor 292, the first temperature sensor 291 is connected to the first SCR reaction chamber 281 and the second SCR reaction chamber 282, the second temperature sensor 292 is connected to an end of the second SCR reaction chamber 282 remote from the first SCR reaction chamber 281, the first SCR temperature sensor group 290 is configured to provide a first temperature value, which is an average temperature of the second SCR reaction chamber 282, and a second temperature value, which is a gas temperature before entering the second SCR reaction chamber 282; the ammonia sensor 300 is located between the first SCR reaction chamber 281 and the second SCR reaction chamber 282, and the ammonia sensor 300 is configured to provide ammonia data, where the ammonia data is an ammonia flow rate of a gas output from the first SCR reaction chamber 281; the first nox sensor 320 is connected to one end of the second temperature sensor 292 remote from the first temperature sensor 291, and the first nox sensor 320 is configured to provide a first nox value, which is a mass flow rate of nox in the exhaust gas of the target automobile after being treated by the first SCR reaction chamber 281 and the second SCR reaction chamber 282; the controller 330 is configured to receive detection data of the first SCR temperature sensor group 290, the ammonia gas sensor 300, and the first nox sensor 320, and the controller 330 is configured to perform any one of the methods.

The control system for tail gas treatment comprises a first SCR temperature sensor group, an ammonia gas sensor, a first nitrogen oxide sensor, an SCR group and a controller, wherein the first SCR temperature sensor group comprises a first temperature sensor and a second temperature sensor which are connected, the first SCR temperature sensor group is used for providing a first temperature value and a second temperature value, the first temperature value is the average temperature of the second SCR reaction chamber, and the second temperature value is the gas temperature before entering the second SCR reaction chamber; the ammonia sensor is positioned between the first SCR reaction chamber and the second SCR reaction chamber, and is used for providing ammonia data, wherein the ammonia data is the ammonia flow rate of gas output by the first SCR reaction chamber; the first nitrogen oxide sensor is connected with one end, far away from the first temperature sensor, of the second temperature sensor, and is used for providing a first nitrogen oxide value, wherein the first nitrogen oxide value is the mass flow of nitrogen oxide of the tail gas of the target automobile after being treated by the first SCR reaction chamber and the second SCR reaction chamber; the SCR group comprises a first SCR reaction chamber and a second SCR reaction chamber, the first SCR reaction chamber is connected with one end of the first temperature sensor, which is far away from the second temperature sensor, the second SCR reaction chamber is respectively connected with the ammonia sensor and the second temperature sensor, and the SCR group is used for realizing an exhaust gas treatment process; the controller is configured to receive detection data from the first SCR temperature sensor group, the ammonia gas sensor, and the first nox sensor, and the controller is configured to use any of the methods described above. Compared with the prior art, the control system for treating the tail gas has the advantages that the problem that the reaction efficiency of the SCR is low due to inaccurate ammonia amount is solved, the control system for treating the tail gas comprises the first SCR reaction chamber and the second SCR reaction chamber, the first SCR temperature sensor group is provided, the first temperature value and the second temperature value can be obtained, the ammonia gas sensor is provided to obtain the ammonia gas data, the first nitrogen oxide value is provided by obtaining the first nitrogen oxide sensor, the parameters are received by the controller, the target ammonia gas set value is determined according to the parameters, the ammonia amount entering the first SCR reaction chamber is controlled to be the target ammonia gas set value, whether the ammonia leakage value exceeds a preset threshold value is determined according to the first nitrogen oxide value and the third data group, the problem that whether the ammonia gas leakage exists in the tail gas treatment is guaranteed to be more accurate is guaranteed, the ammonia gas conversion factor is at least determined according to the first nitrogen oxide sensor, the ammonia gas conversion factor is improved, the ammonia gas conversion efficiency is improved, the ammonia gas flowing into the reaction chamber is improved according to the ammonia gas conversion factor is improved, and the ammonia gas flowing into the ammonia reaction chamber is improved according to the ammonia gas is improved.

In a specific embodiment, the exhaust gas value is calculated by parameters such as fuel oil.

Specifically, the reaction model of the first SCR reaction chamber and the reaction model of the second SCR reaction chamber mainly consider the following chemical reactions:

NH ₃ adsorption of NH ₃ +Surf→NH _3surf

NH ₃ Desorption, NH _3surf →NH ₃ +Surf

Standard SCR,4NH _3surf +4NO+O ₂ →4N ₂ +6H ₂ O

Faster SCR,4NH _3surf +2NO+2NO ₂ →4N ₂ +6H ₂ O

Slower SCR,8NH _3surf +6NO ₂ →7N ₂ +12H ₂ O

NH ₃ Oxidation to form N ₂ (SCR)，4NH _3surf +3O ₂ →2N ₂ +6H ₂ O

NO oxidation, NO+1/2O ₂ →NO ₂

NH ₃ Oxidized formN is formed ₂ ，4NH _3surf +3O ₂ →2N ₂ +6H ₂ O

NH ₃ Oxidation to form NO,4NH _3surf +5O ₂ →4NO+6H ₂ O

NH ₃ Oxidation to form N2O,2NH _3surf +2O ₂ →N ₂ O+3H ₂ O

NO ₂ Formation of N ₂ O，2NH _3surf +2NO ₂ →2N ₂ O+N ₂ +3H ₂ O

NO to form N ₂ O，2NH _3surf +2NO+O ₂ →2N ₂ O+N ₂ +3H ₂ O

NH ₃ Oxidation to form N ₂ O，2NH ₃ +2O ₂ →N ₂ O+3H ₂ O

NH ₃ Oxidation to form N ₂ ，4NH ₃ +3O ₂ →2N ₂ +6H ₂ O

NH ₃ Oxidation to form NO,4NH ₃ +5O ₂ →4NO+6H ₂ O。

According to an embodiment of the present application, as shown in fig. 4, the system further includes a third temperature sensor 340 and a second nox sensor 350, wherein the third temperature sensor 340 is connected to an end of the first SCR reaction chamber 281 remote from the first temperature sensor 291, the third temperature sensor 340 and the first temperature sensor 291 form a second SCR temperature sensor group 360, the second SCR temperature sensor group 360 is configured to provide a fourth temperature value and a fifth temperature value, the fourth temperature value is an average temperature of the first SCR reaction chamber 281, and the fifth temperature value is a temperature before passing through the first SCR reaction chamber 281; the second nox sensor 350 is connected to an end of the third temperature sensor 340 adjacent to the first SCR reaction chamber 281, and the second nox sensor 350 is configured to provide a second nox value, which is a mass flow of the nox in the exhaust gas of the target vehicle before the treatment in the first SCR reaction chamber 281 and the second SCR reaction chamber 282. By arranging the third temperature sensor and the second nitrogen oxide sensor, and the third temperature sensor and the first temperature sensor are used for providing the fourth temperature value and the fifth temperature value, and the second nitrogen oxide sensor is used for determining the target ammonia set value according to the fourth temperature value, the fifth temperature value and the second nitrogen oxide value, the target ammonia set value is further ensured to be obtained simply and accurately, and the efficiency of tail gas treatment is further ensured to be higher.

In a specific embodiment, the first temperature sensor, the second temperature sensor, and the third temperature sensor are each mounted on an exhaust pipe.

Specifically, as shown in fig. 4, the control system for treating the exhaust gas further includes an engine 370, a CCDOC380, a CCSCR390, a DOC400, and a DPF410 connected in this order, and further includes an ASC510, wherein one end of the DPF410, which is far away from the DOC400, is connected to the third temperature sensor 340, the CCDOC380 is used for performing a temperature increasing process, the CCSCR390 is used for performing a preliminary process on the exhaust gas of the target vehicle, the DOC400 is an oxidation catalytic converter, the DPF410 is a particulate matter trap, both ends of the ASC510 are connected to the second SCR reaction chamber 282 and the second temperature sensor 292, respectively, the ASC510 is an ammonia oxidation catalyst, and the ASC510 is used for processing ammonia.

In a specific embodiment, as shown in fig. 4, after determining the target ammonia gas set value, the controller 330 inputs the ammonia gas set module 520, and the ammonia gas set module 520 makes the amount of ammonia gas entering the first SCR reaction chamber 281 be the target ammonia gas set value.

In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units may be a logic function division, and there may be another division manner 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 performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.

The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the above-mentioned method of the various embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

1) In the exhaust gas treatment control method according to the present application, first, a first data set, a second data set and a third data set are acquired, wherein the first data set includes a first temperature value and an exhaust gas value, the first temperature value is an average temperature of the second SCR reaction chamber, the exhaust gas value is a mass flow rate of exhaust gas in exhaust gas of a target automobile, the second data set includes a second temperature value and ammonia data, the second temperature value is a gas temperature before entering the second SCR reaction chamber, the ammonia data is an ammonia flow rate of gas output from the first SCR reaction chamber, the third data set includes at least a first nitrogen-oxygen value and the ammonia data, and the first nitrogen-oxygen value is a mass flow rate of nitrogen oxides of exhaust gas of the target automobile after the first SCR reaction chamber and the second SCR reaction chamber are processed; then, determining a first model ammonia storage value, a first ammonia storage set value and a first nitrogen oxide value according to at least the first data set and the second data set, wherein the first model ammonia storage value is the required ammonia gas amount obtained by simulation by using a reaction model of the second SCR reaction chamber, the first ammonia storage set value is the required ammonia gas amount obtained by calculation according to the first temperature value and the exhaust gas value, and the first nitrogen oxide value is the mass flow rate of nitrogen oxide of the gas processed by the second SCR reaction chamber obtained by simulation by using a reaction model of the second SCR reaction chamber; then, determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value; then, according to the first nitrogen oxide value and the third data set, determining whether the ammonia leakage value exceeds a preset threshold value, and determining a correction factor; and finally, determining a target ammonia set value at least according to the first ammonia correction value and the correction factor, and controlling the ammonia amount entering the first SCR reaction chamber to be the target ammonia set value. Compared with the problem of lower SCR reaction efficiency caused by inaccurate ammonia amount in the prior art, the control method for treating the tail gas of the application has the advantages that the first data set, the second data set and the third data set are obtained, the ammonia storage value of the first model and the first ammonia storage set value are determined according to the first data set and the second data set, the first ammonia correction value is determined according to the ammonia storage value of the first model and the first ammonia storage set value, the ammonia correction value related to the second SCR reaction chamber is obtained, whether the ammonia leakage value exceeds the preset threshold value is determined according to the first nitrogen oxide value and the third data set, whether the ammonia leakage problem exists in the tail gas treatment is ensured, the target ammonia set value is determined according to at least the first ammonia correction value and the correction factor, the ammonia conversion efficiency of the second SCR reaction chamber is ensured to be higher than the target ammonia conversion efficiency determined according to the first ammonia storage value and the correction factor, the ammonia leakage value exceeds the preset threshold value is ensured, and the ammonia leakage problem is ensured to be more accurate according to a plurality of parameters in the third data set, the problem of the tail gas treatment is solved, and the ammonia leakage efficiency of the target ammonia is ensured to be higher than the target ammonia conversion efficiency is ensured.

2) In the exhaust gas treatment control device according to the present application, the first acquisition means acquires a first data set including a first temperature value and an exhaust gas value, the first temperature value being an average temperature of the second SCR reaction chamber, the exhaust gas value being a mass flow rate of exhaust gas in exhaust gas of the target automobile, the second data set including a second temperature value and ammonia gas data, the second temperature value being a gas temperature before entering the second SCR reaction chamber, the ammonia gas data being an ammonia gas flow rate of gas output from the first SCR reaction chamber, and the third data set including at least a first nitrogen-oxygen value and the ammonia gas data, the first nitrogen-oxygen value being a mass flow rate of nitrogen oxides of exhaust gas of the target automobile after being treated by the first SCR reaction chamber and the second SCR reaction chamber; determining, by the first determining unit, a first model ammonia storage value, which is a required amount of ammonia gas simulated by a reaction model of the second SCR reaction chamber, a first ammonia storage set value, which is a required amount of ammonia gas calculated from the first temperature value and the exhaust gas value, and a first nitrogen oxide value, which is a mass flow rate of nitrogen oxide of the gas processed by the second SCR reaction chamber simulated by a reaction model of the second SCR reaction chamber, based on at least the first data set and the second data set; determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value by the second determining unit; determining, by the third determining unit, whether the ammonia leakage value exceeds a predetermined threshold value according to the first nox value and the third data set, and determining a correction factor; and determining a target ammonia gas set value through the fourth determination unit at least according to the first ammonia gas correction value and the correction factor, and controlling the ammonia gas amount entering the first SCR reaction chamber to be the target ammonia gas set value. Compared with the problem of lower SCR reaction efficiency caused by inaccurate ammonia amount in the prior art, the control device for treating the tail gas of the application obtains the first data set, the second data set and the third data set, determines the first model ammonia storage value and the first ammonia storage set value according to the first data set and the second data set, determines the first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value, obtains the ammonia correction value related to the second SCR reaction chamber, determines whether the ammonia leakage value exceeds the preset threshold according to the first nitrogen oxide value and the third data set, ensures that whether the ammonia leakage problem exists in the tail gas treatment according to a plurality of parameters in the third data set, determines the target ammonia set value according to at least the first ammonia correction value and the correction factor, ensures that the target ammonia storage value determined according to at least the first ammonia storage value and the correction factor is more accurate, ensures that the ammonia gas is more effective in the reaction chamber due to the low ammonia conversion efficiency of the SCR reaction chamber, and solves the problem that the ammonia leakage value is more accurate in the first reaction chamber due to the low ammonia conversion efficiency.

3) The control system for tail gas treatment comprises a first SCR temperature sensor group, an ammonia gas sensor, a first nitrogen oxide sensor, an SCR group and a controller, wherein the first SCR temperature sensor group comprises a first temperature sensor and a second temperature sensor which are connected, the first SCR temperature sensor group is used for providing a first temperature value and a second temperature value, the first temperature value is the average temperature of the second SCR reaction chamber, and the second temperature value is the gas temperature before entering the second SCR reaction chamber; the ammonia sensor is positioned between the first SCR reaction chamber and the second SCR reaction chamber, and is used for providing ammonia data, wherein the ammonia data is the ammonia flow rate of gas output by the first SCR reaction chamber; the first nitrogen oxide sensor is connected with one end, far away from the first temperature sensor, of the second temperature sensor, and is used for providing a first nitrogen oxide value, wherein the first nitrogen oxide value is the mass flow of nitrogen oxide of the tail gas of the target automobile after being treated by the first SCR reaction chamber and the second SCR reaction chamber; the SCR group comprises a first SCR reaction chamber and a second SCR reaction chamber, the first SCR reaction chamber is connected with one end of the first temperature sensor, which is far away from the second temperature sensor, the second SCR reaction chamber is respectively connected with the ammonia sensor and the second temperature sensor, and the SCR group is used for realizing an exhaust gas treatment process; the controller is configured to receive detection data of the first SCR temperature sensor group, the ammonia gas sensor, and the first nox sensor, and the controller is configured to perform any one of the methods described above. Compared with the prior art, the control system for treating the tail gas has the advantages that the problem that the reaction efficiency of the SCR is low due to inaccurate ammonia amount is solved, the control system for treating the tail gas comprises the first SCR reaction chamber and the second SCR reaction chamber, the first SCR temperature sensor group is provided, the first temperature value and the second temperature value can be obtained, the ammonia gas sensor is provided to obtain the ammonia gas data, the first nitrogen oxide value is provided by obtaining the first nitrogen oxide sensor, the parameters are received by the controller, the target ammonia gas set value is determined according to the parameters, the ammonia amount entering the first SCR reaction chamber is controlled to be the target ammonia gas set value, whether the ammonia leakage value exceeds a preset threshold value is determined according to the first nitrogen oxide value and the third data group, the problem that whether the ammonia gas leakage exists in the tail gas treatment is guaranteed to be more accurate is guaranteed, the ammonia gas conversion factor is at least determined according to the first nitrogen oxide sensor, the ammonia gas conversion factor is improved, the ammonia gas conversion efficiency is improved, the ammonia gas flowing into the reaction chamber is improved according to the ammonia gas conversion factor is improved, and the ammonia gas flowing into the ammonia reaction chamber is improved according to the ammonia gas is improved.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method of controlling exhaust gas treatment, wherein an exhaust gas treatment process is achieved by a first SCR reaction chamber and a second SCR reaction chamber connected, the method comprising:

acquiring a first data set, a second data set and a third data set, wherein the first data set comprises a first temperature value and an exhaust gas value, the first temperature value is the average temperature of the second SCR reaction chamber, the exhaust gas value is the mass flow of exhaust gas in the tail gas of a target automobile, the second data set comprises a second temperature value and ammonia data, the second temperature value is the gas temperature before entering the second SCR reaction chamber, the ammonia data is the ammonia flow of gas output by the first SCR reaction chamber, the third data set at least comprises a first nitrogen-oxygen value and the ammonia data, and the first nitrogen-oxygen value is the mass flow of nitrogen oxides of the tail gas of the target automobile after being processed by the first SCR reaction chamber and the second SCR reaction chamber;

Determining a first model ammonia storage value, a first ammonia storage set value and a first nitrogen oxide value according to at least the first data set and the second data set, wherein the first model ammonia storage value is the required ammonia amount obtained by simulating a reaction model of the second SCR reaction chamber, the first ammonia storage set value is the required ammonia amount obtained by calculating according to the first temperature value and the waste gas value, and the first nitrogen oxide value is the mass flow of nitrogen oxide of the gas treated by the second SCR reaction chamber obtained by simulating a reaction model of the second SCR reaction chamber;

determining a first ammonia correction value according to the first model ammonia storage value and the first ammonia storage set value;

determining whether an ammonia leakage value exceeds a predetermined threshold value according to the first nitrogen oxide value and the third data set, and determining a correction factor;

and determining a target ammonia set value at least according to the first ammonia correction value and the correction factor, and controlling the ammonia amount entering the first SCR reaction chamber to be the target ammonia set value.

2. The method of claim 1, wherein the first nox value and the third data set form a new third data set, and determining a correction factor based on the first nox value and the third data set comprises:

Acquiring a third corresponding relation, wherein the third corresponding relation is the relation between the third data set and the correction factor;

and determining the correction factor according to the third data set and the third corresponding relation.

3. The method of claim 1, wherein the second data set further comprises the exhaust gas value, a second nitrogen oxide value, and an ammonia gas value, the second nitrogen oxide value being a mass flow rate of nitrogen-containing oxide of the gas treated by the first SCR reaction chamber simulated using the reaction model of the first SCR reaction chamber, the ammonia gas value being a mass flow rate of ammonia gas treated by the first SCR reaction chamber simulated using the reaction model of the first SCR reaction chamber.

4. A method according to claim 3, wherein determining a first model ammonia storage value, a first ammonia storage setpoint, and a first nitrogen oxide value based at least on the first data set and the second data set comprises:

acquiring a first corresponding relation and a first corresponding relation group, wherein the first corresponding relation is a relation between the first data group and the first ammonia storage set value, the first corresponding relation group is a corresponding relation between the second data group and the first model ammonia storage value, a first efficiency value and the first nitrogen oxide value, and the first efficiency value is the simulation reaction efficiency of the second SCR reaction chamber;

Determining the first ammonia storage set point according to the first data set and the first corresponding relation;

and determining the first model ammonia storage value, the first efficiency value and the first nitrogen oxide value according to the second data set and the first corresponding relation set.

5. The method of claim 4, wherein determining a first ammonia correction value based on the first model ammonia storage value and the first ammonia storage setpoint comprises:

calculating a difference value between the first model ammonia storage value and the first ammonia storage set value to obtain a first difference value;

and determining the first ammonia correction value and a first set correction coefficient according to a first difference value and a second corresponding relation, wherein the second corresponding relation is the corresponding relation among the first difference value, the first ammonia correction value and the first set correction coefficient.

6. The method of claim 5, wherein prior to determining a target ammonia setpoint based at least on the first ammonia correction value and the correction factor, the method further comprises:

acquiring a fourth data set, wherein the fourth data set comprises a nitrogen-containing oxide flow, a third temperature value, the first efficiency value and a second efficiency value, the third temperature value is the average value of the gas temperature before entering the first SCR reaction chamber and the gas temperature after being processed by the second SCR reaction chamber, the nitrogen-containing oxide flow is the flow of nitrogen-containing oxide in the tail gas of the target automobile, and the second efficiency value is the simulation reaction efficiency of the first SCR reaction chamber;

And determining a target ammonia gas base value according to the fourth data set and a fourth corresponding relation, wherein the fourth corresponding relation is a relation between the fourth data set and the target ammonia gas base value.

7. The method of claim 6, wherein determining a target ammonia setpoint based at least on the first ammonia correction value and the correction factor comprises:

acquiring a second ammonia correction value and an ammonia increase value, wherein the second ammonia correction value is determined according to the monitoring parameter of the first SCR reaction chamber and the reaction model of the first SCR reaction chamber, and the ammonia increase value is determined according to the reaction model of the first SCR reaction chamber;

calculating the sum of the first ammonia correction value, the second ammonia correction value, the target ammonia base value and the ammonia added value to obtain a preliminary ammonia set value;

and calculating the product of the preliminary ammonia gas set value and the correction factor to obtain the target ammonia gas set value.

8. The method of claim 7, wherein obtaining the second ammonia correction value and the ammonia increase value comprises:

obtaining a fifth data set and a sixth data set, wherein the fifth data set comprises a fourth temperature value, the exhaust gas value, a first set adjustment coefficient and the first set correction coefficient, the fourth temperature value is the average temperature of the first SCR reaction chamber, the first set adjustment coefficient is used for being determined according to a reaction model of the first SCR reaction chamber, the sixth data set comprises the exhaust gas value, a second nitrogen-oxygen value, a fifth temperature value and the first correction coefficient, the second nitrogen-oxygen value is the mass flow rate of nitrogen-containing oxide of the tail gas of the target automobile before being processed by the first SCR reaction chamber and the second SCR reaction chamber, the first correction coefficient is determined according to the reaction model of the first SCR reaction chamber, and the fifth temperature value is the gas temperature before being processed by the first SCR reaction chamber;

Determining a second ammonia storage set value, a second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia value according to the fifth data set and the sixth data set, wherein the second model ammonia storage value is the demand of ammonia obtained by simulation of a reaction model of the first SCR reaction chamber, and the second ammonia storage set value is the demand of ammonia obtained by calculation according to at least the fourth temperature value and the exhaust gas value;

determining the second ammonia correction value according to the second ammonia storage set value and the second model ammonia storage value;

and determining the ammonia gas increasing value, the first set adjustment coefficient and the first correction coefficient according to the ammonia gas value and the ammonia gas data.

9. The method of claim 8, wherein determining a second ammonia storage setpoint, a second model ammonia storage value, the second efficiency value, the second nitrogen oxide value, and the ammonia value based on the fifth data set and the sixth data set comprises:

obtaining a fifth corresponding relation and a second corresponding relation group, wherein the fifth corresponding relation is a corresponding relation between the fifth data group and the second ammonia storage set value, and the second corresponding relation group is a corresponding relation between the sixth data group and the second model ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia gas value;

Determining the second ammonia storage set point according to the fifth data set and the fifth corresponding relation;

and determining the ammonia storage value, the second efficiency value, the second nitrogen oxide value and the ammonia gas value of the second model according to the sixth data set and the second corresponding relation set.

10. The method of claim 8, wherein determining the second ammonia correction value based on the second ammonia storage setpoint and the second model ammonia storage value comprises:

calculating a difference value between the second ammonia storage set value and the second model ammonia storage value to obtain a second difference value;

and determining the second ammonia correction value according to a second difference value and a sixth corresponding relation, wherein the sixth corresponding relation is the corresponding relation between the second difference value and the second ammonia correction value.

11. The method of claim 8, wherein determining the ammonia increment value, the first set adjustment coefficient, and the first correction coefficient based on the ammonia value and the ammonia data comprises:

acquiring a third corresponding relation group, wherein the third corresponding relation group is a corresponding relation among the ammonia value, the ammonia data, the ammonia added value, the first set adjustment coefficient and the first correction coefficient;

And determining the ammonia gas increasing value, the first setting adjustment coefficient and the first correction coefficient according to the ammonia gas value, the ammonia gas data and the third corresponding relation group.

12. A control device for exhaust gas treatment, characterized in that an exhaust gas treatment process is realized by a first SCR reaction chamber and a second SCR reaction chamber connected, the device comprising:

the first acquisition unit is used for acquiring a first data set, a second data set and a third data set, wherein the first data set comprises a first temperature value and an exhaust gas value, the first temperature value is the average temperature of the second SCR reaction chamber, the exhaust gas value is the mass flow rate of exhaust gas in the tail gas of the target automobile, the second data set comprises a second temperature value and ammonia data, the second temperature value is the gas temperature before entering the second SCR reaction chamber, the ammonia data is the ammonia flow rate of gas output by the first SCR reaction chamber, the third data set at least comprises a first nitrogen-oxygen value and the ammonia data, and the first nitrogen-oxygen value is the mass flow rate of nitrogen oxides of the tail gas of the target automobile after being processed by the first SCR reaction chamber and the second SCR reaction chamber;

The first determining unit is configured to determine a first model ammonia storage value, a first ammonia storage set value and a first nitrogen oxide value according to at least the first data set and the second data set, where the first model ammonia storage value is a required amount of ammonia obtained by simulation using a reaction model of the second SCR reaction chamber, the first ammonia storage set value is a required amount of ammonia obtained by calculation according to the first temperature value and the exhaust gas value, and the first nitrogen oxide value is a mass flow rate of nitrogen oxide of gas processed by the second SCR reaction chamber obtained by simulation using a reaction model of the second SCR reaction chamber;

the second determining unit is used for determining a first ammonia correction value according to the first ammonia storage value and the first ammonia storage set value;

a third determining unit configured to determine whether an ammonia leakage value exceeds a predetermined threshold value, and determine a correction factor, based on the first nitrogen oxide value and the third data set;

and the fourth determining unit is used for determining a target ammonia set value at least according to the first ammonia correction value and the correction factor and controlling the ammonia amount entering the first SCR reaction chamber to be the target ammonia set value.

13. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored program, wherein the program performs the method of any one of claims 1 to 11.

14. A processor for running a program, wherein the program when run performs the method of any one of claims 1 to 11.

15. A control system for exhaust gas treatment, the system comprising:

the system comprises an SCR group, a first control unit, a second control unit and a control unit, wherein the SCR group comprises a first SCR reaction chamber and a second SCR reaction chamber which are connected, and is used for realizing an exhaust treatment process;

the first SCR temperature sensor group comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is respectively connected with the first SCR reaction chamber and the second SCR reaction chamber, the second temperature sensor is connected with one end of the second SCR reaction chamber far away from the first SCR reaction chamber, the first SCR temperature sensor group is used for providing a first temperature value and a second temperature value, the first temperature value is the average temperature of the second SCR reaction chamber, and the second temperature value is the gas temperature before entering the second SCR reaction chamber;

The ammonia sensor is positioned between the first SCR reaction chamber and the second SCR reaction chamber and is used for providing ammonia data, and the ammonia data is the ammonia flow rate of gas output by the first SCR reaction chamber;

the first nitrogen oxide sensor is connected with one end, far away from the first temperature sensor, of the second temperature sensor and is used for providing a first nitrogen oxide value, and the first nitrogen oxide value is the mass flow of nitrogen oxides of the tail gas of the target automobile after being treated by the first SCR reaction chamber and the second SCR reaction chamber;

a controller for receiving detection data of the first SCR temperature sensor group, the ammonia gas sensor and the first nitrogen oxide sensor, and for performing the method of any one of claims 1 to 11.

16. The control system of claim 15, wherein the system further comprises:

a third temperature sensor connected to one end of the first SCR reaction chamber away from the first temperature sensor, the third temperature sensor and the first temperature sensor being connected to a second SCR temperature sensor group for providing a fourth temperature value and a fifth temperature value, the fourth temperature value being an average temperature of the first SCR reaction chamber, the fifth temperature value being a temperature before passing through the first SCR reaction chamber;

The second nitrogen oxide sensor is connected with one end, close to the first SCR reaction chamber, of the third temperature sensor and is used for providing a second nitrogen oxide value, and the second nitrogen oxide value is the mass flow of nitrogen oxides in tail gas of the target automobile before being processed by the first SCR reaction chamber and the second SCR reaction chamber.