CN116201622A

CN116201622A - Particulate matter treatment method and device and electronic equipment

Info

Publication number: CN116201622A
Application number: CN202310260096.4A
Authority: CN
Inventors: 李钊; 褚国良; 秦海玉; 邱东; 王国栋; 徐文娟; 杨新刚; 朱振
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-06-02

Abstract

The application discloses a particulate matter treatment method and device and electronic equipment, wherein the method comprises the following steps: when the current carbon load in the exhaust of the engine exceeds a first threshold value, determining a first regenerated fuel injection quantity according to the current DOC upstream temperature, controlling a post-injection nozzle in an engine cylinder to raise the current CCDOC downstream temperature to a preset downstream temperature, and controlling the post-treatment device to inject based on the first regenerated fuel injection quantity; and when the current carbon loading does not exceed the first threshold and exceeds the second threshold, determining a second regenerated fuel injection quantity according to the current CCDOC upstream temperature, controlling a second rear nozzle in the engine cylinder to control the CCDOC upstream temperature to a preset hydrocarbon light-off temperature, controlling a first rear nozzle in the engine cylinder to inject based on the second regenerated fuel injection quantity, and performing model training with the environmental temperature in the output sample as a target. And the passive regeneration reaction rate is improved, the carbon loading is effectively balanced, the active regeneration period is prolonged, and the operation efficiency of a user is improved.

Description

Particulate matter treatment method and device and electronic equipment

Technical Field

The invention relates to the technical field of automobile aftertreatment, in particular to a particulate matter treatment method and device and electronic equipment.

Background

The DPF (Diesel Particulate Filter, particulate matter trap) is used to trap engine particulate matter, thereby reducing the amount of ash discharged into the atmosphere. The particulate matters trapped in the DPF can be burnt through active regeneration or passive regeneration, but the running conditions of some special vehicles are relatively poor, incomplete regeneration is often carried out, the carbon load can be inaccurate due to multiple incomplete regenerations, and the DPF has the risk of overload.

Disclosure of Invention

The application aims to provide a particulate matter treatment method and device and electronic equipment. The method is used for solving the problems that the running condition of the existing special vehicle is relatively poor, the condition of incomplete regeneration often exists, the judgment of carbon loading is inaccurate due to multiple times of incomplete regeneration, and the DPF has the risk of overload.

In a first aspect, embodiments of the present application provide a particulate matter processing apparatus, including: the device comprises an aftertreatment device, a close-coupled oxidation catalytic converter CCDOC and a processor;

the post-treatment device is used for collecting the particulate matters discharged by the engine and carrying out combustion treatment on the collected particulate matters by injecting diesel;

the CCDOC is arranged between an engine exhaust port and the aftertreatment device and is used for increasing the temperature of the upstream of the oxidation catalytic converter DOC in the aftertreatment device;

The processor is configured to:

when the current carbon load in the exhaust of the engine exceeds a first threshold value, determining a first regenerated fuel injection quantity according to the current DOC upstream temperature, controlling a rear nozzle in an engine cylinder to raise the current CCDOC downstream temperature to a preset downstream temperature, and controlling the aftertreatment device to inject based on the first regenerated fuel injection quantity;

when the current carbon loading does not exceed the first threshold value and exceeds the second threshold value, determining a second regenerated fuel injection quantity according to the current CCDOC upstream temperature, controlling a second rear nozzle in an engine cylinder to control the CCDOC upstream temperature to a preset hydrocarbon light-off temperature, and controlling a first rear nozzle in the engine cylinder to inject based on the second regenerated fuel injection quantity;

wherein the first threshold is greater than the second threshold.

In some possible embodiments, the device further comprises a selective catalytic conversion device CCSCR disposed between the CCDOC and the aftertreatment device, the CCSCR for controlling the conversion efficiency of NOx.

In a second aspect, embodiments of the present application provide a particulate matter treatment method, the method comprising:

when the current carbon load in the exhaust of the engine exceeds a first threshold value, determining a first regenerated fuel injection quantity according to the current DOC upstream temperature, controlling a post-injection nozzle in an engine cylinder to raise the current CCDOC downstream temperature to a preset downstream temperature, and controlling the post-treatment device to inject based on the first regenerated fuel injection quantity;

wherein the first threshold is greater than the second threshold.

In some possible embodiments, the controlling the in-cylinder post-engine nozzle to raise the current CCDOC downstream temperature to a preset downstream temperature includes:

controlling a second rear nozzle in an engine cylinder to raise the current CCDOC upstream temperature to a preset initial hydrocarbon light-off temperature;

and controlling a first rear nozzle in an engine cylinder to raise the downstream temperature of the CCDOC from the initial hydrocarbon light-off temperature to the preset downstream temperature.

In some possible embodiments, the determining the first regenerated fuel injection amount according to the current DOC upstream temperature includes:

determining a first temperature set point upstream of the DPF according to the DOC upstream temperature and the current engine exhaust gas mass flow;

determining a first feed-forward fuel injection amount according to the first temperature set value, the current DOC upstream temperature, the heat value of diesel, the conversion efficiency of hydrocarbon in the DOC, the mass flow of exhaust gas and the hot melting of exhaust gas;

Determining a first feedback oil injection quantity according to the current DOC upstream temperature and the first temperature set value;

and determining the first regenerated fuel injection amount according to the first feedforward fuel injection amount and the first feedback fuel injection amount.

In some possible embodiments, the determining the first regenerated fuel injection amount according to the first feedforward fuel injection amount and the first feedback fuel injection amount includes:

if the sum of the first feedforward oil injection quantity and the first feedback oil injection quantity is smaller than or equal to a first preset oil injection quantity, taking the sum of the first feedforward oil injection quantity and the first feedback oil injection quantity as the first regenerated oil injection quantity;

and if the sum of the first feedforward oil injection quantity and the first feedback oil injection quantity is larger than a first preset oil injection quantity, taking the first preset oil injection quantity as the first regenerated oil injection quantity.

In some possible embodiments, the determining the second regenerated fuel injection amount according to the current ccoc upstream temperature includes:

determining a second temperature set point downstream of the CCDOC based on the temperature upstream of the CCDOC and the current engine exhaust mass flow;

determining a second feed-forward fuel injection amount according to the second temperature set point, the current CCDOC upstream temperature, the heat value of diesel, the conversion efficiency of hydrocarbon in the CCDOC, the mass flow rate of the exhaust gas and the hot melting of the exhaust gas;

Determining a second feedback fuel injection amount according to the current CCDOC upstream temperature and the second temperature set value;

and determining the second regenerated fuel injection quantity according to the second feedforward fuel injection quantity and the second feedback fuel injection quantity.

In some possible embodiments, the determining the second regenerated fuel injection amount according to the second feedforward fuel injection amount and the second feedback fuel injection amount includes:

if the sum of the second feedforward oil injection quantity and the second feedback oil injection quantity is smaller than or equal to a second preset oil injection quantity, taking the sum of the second feedforward oil injection quantity and the second feedback oil injection quantity as the second regenerated oil injection quantity;

and if the sum of the second feedforward oil injection quantity and the second feedback oil injection quantity is larger than a second preset oil injection quantity, taking the second preset oil injection quantity as the second regenerated oil injection quantity.

In a third aspect, embodiments of the present application provide an electronic device comprising at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the particulate matter treatment method provided in the second aspect above.

In a fourth aspect, embodiments of the present application provide a computer storage medium storing a computer program for causing a computer to execute the particulate matter treatment method provided in the second aspect described above.

According to the embodiment of the application, in order to solve the problems that the running condition of the existing special vehicle is relatively poor, the condition of incomplete regeneration is frequently existed, the judgment of carbon load is inaccurate due to multiple times of incomplete regeneration, and the DPF is at risk of overload, the CCDOC and the CCSCR are additionally arranged after the turbocharger.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings that are described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a particulate treatment device according to one embodiment of the present application;

FIG. 2 is a schematic flow diagram of a particulate matter treatment method according to one embodiment of the present application;

FIG. 3 is a logic diagram for determining a first regeneration fuel injection amount in an active regeneration mode according to one embodiment of the present application;

FIG. 4 is a logic diagram of determining a second regeneration fuel injection amount in a passive regeneration mode according to one embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and in addition, in the description of the embodiments of the present application, "plural" means two or more than two.

In the description of the embodiments of the present application, unless otherwise indicated, the term "plurality" refers to two or more, and other words and phrases are to be understood and appreciated that the preferred embodiments described herein are for illustration and explanation of the present application only and are not intended to limit the present application, and embodiments of the present application and features of the embodiments may be combined with each other without conflict.

In order to further explain the technical solutions provided in the embodiments of the present application, the following details are described with reference to the accompanying drawings and the detailed description. Although the embodiments of the present application provide the method operational steps as shown in the following embodiments or figures, more or fewer operational steps may be included in the method based on routine or non-inventive labor. In steps where there is logically no necessary causal relationship, the execution order of the steps is not limited to the execution order provided by the embodiments of the present application. The methods may be performed sequentially or in parallel as shown in the embodiments or the drawings when the actual processing or the control device is executing.

In view of the relatively poor operating conditions of some special vehicles in the related art, the condition of incomplete regeneration often exists, and the problem that multiple times of incomplete regeneration can cause inaccurate judgment of carbon loading and overload risks of DPF exists. The application provides a particulate matter treatment method and device, and electronic equipment, which can improve the temperature of the upstream of a DOC, improve the content of nitrogen oxides, further improve the passive regeneration reaction rate, effectively balance the carbon loading, prolong the active regeneration period and improve the operation efficiency of a user.

Some of the terms in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.

CCDOC (close coupled diesel oxide catalyst, close-coupled oxidation catalytic converter): the CCDOC is used for converting NO in the tail gas to NO2 through oxidation, and assists normal operation of the CCSCR.

CCSCR (close coupled selectively catalytic reduction, tightly coupled selective catalytic conversion device): CCSCR is a catalyst which is usually additionally arranged at the forefront end of an SCR aftertreatment system so as to fully utilize heat in tail gas, reduce urea blowout time and improve NOx conversion efficiency of the aftertreatment system at low temperature.

DOC (diesel oxide catalyst, oxidation catalytic converter): an oxidation catalytic converter may be installed before the DPF for converting NO in the exhaust gas to NO2, and for raising the temperature of the exhaust gas to assist in normal operation of the DPF and SCR.

DPF (diesel particulate filter, particulate matter trap): the method is used for trapping the particulate matters in the tail gas, and when the trapped particulate matters reach a certain level, passive regeneration or active regeneration is required, so that the trapping capacity of the DPF on the particulate matters is recovered.

SCR (selectively catalytic reduction, selective catalytic conversion device): SCR is a catalyst additionally arranged behind CCSCR, and is an effective means for reducing the emission of nitrogen oxides of a diesel engine by utilizing a selective catalytic reduction technology.

ASC (Ammonia Slip Catalyst, ammonia oxidation catalyst): ASC is a device for treating exhaust gas of diesel vehicles, which is arranged at the rear end of SCR and reduces the ammonia leaked from the exhaust gas at the rear end of SCR through catalytic oxidation.

The particulate matter treatment method in the embodiments of the present application will be described in detail with reference to the accompanying drawings.

Referring to fig. 1, a schematic view of a particulate treatment device according to one embodiment of the present application is shown.

As shown in FIG. 1, the device comprises an aftertreatment device, a close-coupled oxidation catalytic converter CCDOC, and a processor. The post-treatment device is used for collecting the particulate matters discharged by the engine and carrying out combustion treatment on the collected particulate matters by injecting diesel; the CCDOC is arranged between an exhaust port of the engine and the aftertreatment device, and is used for increasing the temperature of the aftertreatment device upstream of the oxidation catalytic converter DOC.

As an alternative embodiment, the device further comprises a selective catalytic conversion device CCSCR arranged between the CCDOC and the aftertreatment device, the CCSCR being adapted to control the conversion efficiency of NOx.

Specifically, in fig. 1, pipe is an engine exhaust Pipe, and CCDOC and CCSCR at an engine exhaust port are sequentially connected along the engine exhaust Pipe, an air inlet end of the CCDOC is connected with the engine exhaust port, and an air outlet end of the CCDOC is connected with an air inlet end of the CCSCR. The aftertreatment device comprises a DOC, a DPF system, an SCR and an ASC which are sequentially communicated along an exhaust pipe, wherein an air outlet end of the CCSCR is connected with an air inlet end of the DOC system.

As an alternative embodiment, the particulate matter processing apparatus of the present application further includes: the first temperature sensor is arranged on the exhaust pipe between the engine and the CCDOC and used for detecting the upstream temperature of the CCDOC; the second temperature sensor is arranged at the downstream of the CCDOC and used for detecting the temperature at the downstream of the CCDOC; the third temperature sensor is arranged on the exhaust pipe between the CCSCR and the DOC and used for detecting the temperature of exhaust gas at the upstream of the DOC; a fourth temperature sensor arranged at the downstream of the DOC and used for detecting the temperature of exhaust gas at the downstream of the DOC, and a fifth temperature sensor arranged between the DPF and the SCR and used for detecting the temperature of exhaust gas at the upstream of the SCR; and a sixth temperature sensor disposed downstream of the SCR for detecting a temperature of exhaust gas downstream of the SCR.

It is noted that when engine exhaust gas flows through the DOC, CO and HC are first almost entirely oxidized to CO2 and H2O at temperatures of 200-600 ℃ while nitric oxide is converted to nitrogen dioxide. After the exhaust gas comes out of the DOC and enters a particle catcher (DPF), the particles are caught in a filter element of a filter body, cleaner exhaust gas is left to be discharged into the atmosphere, and the catching efficiency of the DPF can reach more than 90 percent. The exhaust particulate matter of an engine mainly comprises two components: unburned Soot (Soot), ash (ash), where particulate emissions are mostly composed of tiny particles of carbon and carbide. Along with the lengthening of the working time, more and more particles are accumulated on the DPF, so that the filtering effect of the DPF is affected, the exhaust back pressure is increased, the ventilation and combustion of an engine are affected, the power output is reduced, the oil consumption is increased, and therefore, the particles on the DPF need to be eliminated in time, namely, the deposited particles need to be removed periodically in the long-term working of the DPF, and the filtering performance of the DPF is recovered.

DPF regeneration is divided into two methods, active regeneration and passive regeneration: active regeneration refers to the use of external energy to raise the temperature within the DPF to ignite and burn the particulate matter. When the differential pressure sensor detects that the back pressure of the DPF is overlarge, the accumulated carbon quantity carried by the DPF is considered to be reached, and the temperature in the DPF is increased by external energy, such as diesel oil injection and combustion before the DOC, so that the temperature in the DPF reaches a certain temperature, deposited particles are oxidized and combusted, and the purpose of regeneration is achieved. The DPF temperature rises above 550 ℃ to burn the trapped particulates therein and thereby restore the trapping ability of the DPF. The passive regeneration means that nitrogen dioxide in the tail gas has strong oxidizing ability to the trapped particles in a certain temperature interval, so that the nitrogen dioxide can be used as an oxidizing agent to remove the particles in the particle trap, carbon dioxide is generated, and the nitrogen dioxide is reduced to nitric oxide, thereby achieving the purpose of removing the particles. The passive regeneration does not need extra fuel, so the more times the passive regeneration is performed in the life cycle of the DPF, the longer the period of active regeneration is needed, and the less fuel is consumed by the aftertreatment system, so the overall fuel consumption of the engine is improved.

According to the method, one path of CCDOC and CCSCR are added after the turbocharger, when a passive regeneration request is made, the temperature of the upstream of the DOC is increased, the content of nitrogen oxides is increased, the passive regeneration reaction rate is further increased, the carbon load is effectively balanced, the active regeneration period is prolonged, and the operation efficiency of a user is improved.

Fig. 2 is a schematic flow chart of a particulate matter treatment method according to an embodiment of the present application, which is applied to a processor in the particulate matter treatment device, and includes:

step 201: when the current carbon load in the exhaust of the engine exceeds a first threshold value, determining a first regenerated fuel injection quantity according to the current DOC upstream temperature, controlling a post-injection nozzle in an engine cylinder to raise the current DOC upstream temperature to a preset upstream temperature, and controlling the post-treatment device to inject based on the first regenerated fuel injection quantity.

Specifically, the value of the carbon loading in the engine exhaust is first determined, if the current carbon loading exceeds a preset first threshold, the processor defaults to an active regeneration mode, which requires three warm-ups, the first two warm-ups being to raise the CCDOC downstream temperature, and the third warm-up being to initiate hydrocarbon injection to raise the DPF upstream temperature.

As an alternative embodiment, the controlling the in-cylinder rear nozzle of the engine to raise the current CCDOC downstream temperature to a preset downstream temperature includes:

controlling a second rear nozzle in an engine cylinder to raise the current CCDOC upstream temperature to a preset initial hydrocarbon light-off temperature; and controlling a first rear nozzle in an engine cylinder to raise the downstream temperature of the CCDOC from the initial hydrocarbon light-off temperature to the preset downstream temperature.

Specifically, the first temperature rise in the active regeneration is the thermal management of the upstream temperature of the CCDOC, and the upstream temperature of the CCDOC is raised to the preset initial hydrocarbon light-off temperature through the thermal management measures such as a second rear nozzle, an air inlet throttle valve and the like in an engine cylinder; the second temperature rise in the active regeneration is to raise the CCDOC downstream temperature to a preset downstream temperature by controlling a first rear nozzle in the engine cylinder. In the first heating process, the upstream temperature of the CCDOC is raised to about 280 ℃; during the second temperature increase, the preset downstream temperature of the CCDOC is obtained by inquiring MAP according to the upstream temperature of the CCDOC and the mass flow of the exhaust gas through the first rear nozzle in the engine cylinder, and the temperature can be, but is not limited to, 450 ℃.

As an alternative embodiment, determining the first regenerated fuel injection amount according to the current DOC upstream temperature includes: determining a first temperature set point upstream of the DPF according to the DOC upstream temperature and the current engine exhaust gas mass flow; determining a first feed-forward fuel injection amount according to the first temperature set value, the current DOC upstream temperature, the heat value of diesel, the conversion efficiency of hydrocarbon in the DOC, the mass flow of exhaust gas and the hot melting of exhaust gas; determining a first feedback oil injection quantity according to the current DOC upstream temperature and the first temperature set value; and determining the first regenerated fuel injection amount according to the first feedforward fuel injection amount and the first feedback fuel injection amount.

Specifically, the third temperature rise in the active regeneration process is performed by two-way injection of hydrocarbon and the first post-nozzle in the engine cylinder, and the temperature upstream of the DPF is required to be raised to 600 ℃ according to the temperature upstream of the DOC and the first temperature set value obtained by checking the MAP according to the current engine exhaust gas mass flow, but not limited to 600 ℃.

According to the heat formula q=c×m×Δt;

wherein Q is the heat required to be released when the temperature of the upstream of the DPF is raised to 600 ℃, c is the hot melt of the exhaust gas of the engine, m is the mass flow of the exhaust gas of the engine, and delta t is the first temperature set value minus the current temperature value of the upstream of the DOC measured by a third temperature sensor for detecting the temperature of the exhaust gas of the upstream of the DOC. Wherein, the hot melt c of the exhaust is obtained based on the temperature check CUR at the upstream of the DOC; the mass flow m of the engine exhaust gas obtains the conversion efficiency of hydrocarbon in the DOC by checking MAP.

The first feed-forward injection quantity q=q/heating value of diesel/conversion efficiency of hydrocarbon in DOC.

After the feed-forward control fuel injection amount calculation is completed, the closed-loop control fuel injection amount needs to be further calculated.

Referring to fig. 3, according to the DOC upstream temperature and the current engine exhaust gas mass flow, a first temperature set value of the upstream of the DPF is determined, the difference is made between the first temperature set value and the DPF upstream actual temperature value monitored in real time by a fourth temperature sensor, the deviation between the DPF upstream actual temperature and the DPF upstream first temperature set value is obtained, and a first feedback fuel injection quantity under the condition of closed loop control is calculated by a PI controller.

And obtaining the final injection quantity required to be injected by hydrocarbon injection by summing the first feedforward injection quantity and the first feedback injection quantity.

Specifically, when the feedforward control is performed, for example, the first temperature set value upstream of the DPF is 600 degrees, the first feedforward injection quantity calculated by the feedforward control is the diesel quantity to be injected when the temperature upstream of the DPF reaches 600 degrees, but in the actual injection process, after the injection of the first feedforward injection quantity is completed, the temperature upstream of the DPF may be only 560 degrees, that is, after the first feedforward injection quantity calculated by the feedforward control is completed, the temperature upstream of the DPF cannot reach the first temperature set value 600 degrees in the ideal state, and then closed-loop control is required, and the temperature difference of 40 degrees is subjected to replenishment injection, and the first feedback quantity calculated by the closed-loop control is the diesel quantity to be injected by replenishment injection performed when the actual temperature upstream of the DPF reaches the first temperature set value 600 degrees calculated in the ideal state as much as possible.

The active regeneration is divided into three steps, the purpose of heating is to enable the upstream temperature of the CCDOC to reach the hydrocarbon light-off temperature at first, and the thermal management is activated; after the downstream temperature of the CCDOC reaches the preset downstream temperature through the first rear nozzle in the engine cylinder, hydrocarbon injection and double-way oil injection of the first rear nozzle in the engine cylinder are carried out, so that hydrocarbon leakage is greatly reduced.

As an alternative embodiment, determining the first regenerated fuel injection amount according to the first feedforward fuel injection amount and the first feedback fuel injection amount includes: if the sum of the first feedforward oil injection quantity and the first feedback oil injection quantity is smaller than or equal to a first preset oil injection quantity, taking the sum of the first feedforward oil injection quantity and the first feedback oil injection quantity as the first regenerated oil injection quantity; and if the sum of the first feedforward oil injection quantity and the first feedback oil injection quantity is larger than a first preset oil injection quantity, taking the first preset oil injection quantity as the first regenerated oil injection quantity.

Specifically, in order to optimize the final first regeneration injection quantity, the first preset injection quantity sets a regeneration injection boundary value for the active regeneration mode in advance in the present application. And carrying out a subtraction operation on the first feedforward oil injection quantity and the first feedback oil injection quantity after summing the first feedforward oil injection quantity and the first feedback oil injection quantity to obtain a summation value, taking the summation value as a final first regenerated oil injection quantity if the summation value is smaller than or equal to the first preset oil injection quantity, and taking the first preset oil injection quantity as the final first regenerated oil injection quantity if the summation value is larger than the first preset oil injection quantity.

Step 202: and when the current carbon loading does not exceed the first threshold value and exceeds the second threshold value, determining a second regenerated fuel injection quantity according to the current CCDOC upstream temperature, controlling a second rear nozzle in the engine cylinder to control the CCDOC upstream temperature to a preset hydrocarbon light-off temperature, and controlling a first rear nozzle in the engine cylinder to inject based on the second regenerated fuel injection quantity. Wherein the first threshold is greater than the second threshold.

Specifically, the passive regeneration mode is turned on when the current carbon loading does not exceed the first threshold and exceeds the second threshold. The passive regeneration mode includes a two-step warming. The first temperature rising process: firstly, the heat management of the upstream temperature of the CCDOC is carried out, the upstream temperature of the CCDOC is controlled to be higher than the hydrocarbon light-off temperature through heat management measures such as an air inlet throttle valve, a second rear nozzle in an engine cylinder and the like, and the hydrocarbon light-off temperature in a passive regeneration mode can be but is not limited to 280 ℃. The second temperature rising process: and after the second rear nozzle in the engine cylinder injects the fixed amount of diesel oil to enable the upstream temperature of the CCDOC to reach 280 ℃, the second regenerated fuel injection amount is injected by controlling the first rear nozzle in the engine cylinder.

As an alternative embodiment, determining the second regeneration fuel injection amount according to the current ccoc upstream temperature includes: determining a second temperature set point downstream of the CCDOC based on the temperature upstream of the CCDOC and the current engine exhaust mass flow; determining a second feed-forward fuel injection amount according to the second temperature set point, the current CCDOC upstream temperature, the heat value of diesel, the conversion efficiency of hydrocarbon in the CCDOC, the mass flow rate of the exhaust gas and the hot melting of the exhaust gas; determining a second feedback fuel injection amount according to the current CCDOC upstream temperature and the second temperature set value; and determining the second regenerated fuel injection quantity according to the second feedforward fuel injection quantity and the second feedback fuel injection quantity.

Specifically, the second temperature rise during passive regeneration is performed through a first post-injection nozzle in the engine cylinder, and the MAP is checked for a second temperature set point downstream of the CCDOC based on the temperature upstream of the CCDOC and the current exhaust flow of the engine, which may be, but is not limited to, 450 ℃, i.e., the temperature downstream of the CCDOC needs to be raised to 450 ℃.

According to the heat formula q=c×m×Δt;

wherein Q is the heat required to be released when the temperature of the downstream of the CCDOC is increased to 450 ℃, c is the hot melt of the exhaust gas of the engine, m is the mass flow of the exhaust gas of the engine, and delta t is the second temperature set value minus the current value of the upstream temperature of the CCDOC measured by the first temperature sensor for detecting the upstream temperature of the CCDOC. Wherein, the hot melt c of the exhaust is obtained based on the temperature check CUR at the upstream of the CCDOC; the conversion efficiency of hydrocarbon in the CCDOC is obtained by looking up MAP based on the temperature upstream of the CCDOC and the current engine exhaust mass flow.

The second feed-forward injection quantity q=q/heating value of diesel/conversion efficiency of hydrocarbon in CCDOC.

Referring to fig. 4, according to the upstream temperature of the CCDOC and the current engine exhaust gas mass flow, a second temperature set value of the downstream of the CCDOC is determined, and the difference is made between the second temperature set value and the actual temperature value of the downstream of the CCDOC monitored in real time by a second temperature sensor for detecting the downstream temperature of the CCDOC, so as to obtain the deviation between the actual temperature of the downstream of the CCDOC and the second temperature set value of the downstream of the CCDOC, and a second feedback oil injection quantity under the condition of closed loop control is calculated by a PI controller.

And obtaining the final fuel injection quantity required to be injected by the first rear nozzle in the engine cylinder by summing the second feedforward fuel injection quantity and the second feedback fuel injection quantity.

Specifically, the feedforward control is performed by controlling the downstream temperature of the CCDOC, for example, the second temperature set value downstream of the CCDOC is 450 degrees, the second feedforward fuel injection amount calculated by the feedforward control is the amount of diesel fuel to be injected when the downstream temperature of the CCDOC reaches 450 degrees, but in the actual injection process, after the injection of the second feedforward fuel injection amount is completed, the second temperature set value 450 degrees in the ideal state may not be reached after the second feedforward fuel injection amount calculated by the feedforward control is completed, and closed-loop control is performed, and the difference between 20 degrees is performed for the replenishment injection.

And the CCDOC downstream temperature is used as a feedback oil injection quantity to carry out closed-loop control, so that the content of nitrogen dioxide is improved, the passive regeneration reaction rate is further improved, the carbon load is effectively balanced, the active regeneration period is prolonged, and the operation efficiency of a user is improved.

As an alternative embodiment, determining the second regenerated fuel injection amount according to the second feedforward fuel injection amount and the second feedback fuel injection amount includes: if the sum of the second feedforward oil injection quantity and the second feedback oil injection quantity is smaller than or equal to a second preset oil injection quantity, taking the sum of the second feedforward oil injection quantity and the second feedback oil injection quantity as the second regenerated oil injection quantity; and if the sum of the second feedforward oil injection quantity and the second feedback oil injection quantity is larger than a second preset oil injection quantity, taking the second preset oil injection quantity as the second regenerated oil injection quantity.

Specifically, in order to optimize the final second regeneration injection quantity, the second preset injection quantity sets a regeneration injection boundary value for the passive regeneration mode in advance in the present application. And carrying out small calculation on the second feedforward oil injection quantity and the second feedback oil injection quantity after summing the second feedforward oil injection quantity and the second feedback oil injection quantity to obtain a summation value, taking the summation value as a final second regenerated oil injection quantity if the summation value is smaller than or equal to the second preset oil injection quantity, and taking the second preset oil injection quantity as the final second regenerated oil injection quantity if the summation value is larger than the second preset oil injection quantity.

As an alternative embodiment, the processor in the particulate matter processing apparatus is configured to perform:

when the current carbon loading does not exceed the first threshold value and exceeds the second threshold value, determining a second regenerated fuel injection quantity according to the current CCDOC upstream temperature, controlling a second rear nozzle in an engine cylinder to control the CCDOC upstream temperature to a preset hydrocarbon light-off temperature, and controlling a first rear nozzle in the engine cylinder to inject based on the second regenerated fuel injection quantity; wherein the first threshold is greater than the second threshold.

According to the method, one path of CCDOC and CCSCR are added after the turbocharger, when the carbon loading capacity does not exceed the first threshold value and exceeds the second threshold value, a passive regeneration request is triggered, the downstream temperature of the CCDOC is improved, the nitrogen dioxide content is improved, meanwhile, due to the protection of the DPF, when the carbon loading capacity exceeds the first threshold value, high-temperature active regeneration is carried out, and the operation efficiency of a user is improved.

Having described the particulate matter treatment method and apparatus of an exemplary embodiment of the present application, next, an electronic device according to another exemplary embodiment of the present application is described.

Those skilled in the art will appreciate that the various aspects of the present application may be implemented as a system, method, or program product. Accordingly, aspects of the present application may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.

In some possible implementations, an electronic device according to the present application may include at least one processor, and at least one memory. The memory stores therein program code that, when executed by the processor, causes the processor to perform the steps in the particulate matter processing method according to various exemplary embodiments of the present application described above in this specification.

An electronic device 130 according to this embodiment of the present application, i.e., the particulate matter treatment device described above, is described below with reference to fig. 5. The electronic device 130 shown in fig. 5 is only an example and should not be construed as limiting the functionality and scope of use of embodiments of the present application.

As shown in fig. 5, the electronic device 130 is in the form of a general-purpose electronic device. Components of electronic device 130 may include, but are not limited to: the at least one processor 131, the at least one memory 132, and a bus 133 connecting the various system components, including the memory 132 and the processor 131.

Bus 133 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a processor, and a local bus using any of a variety of bus architectures.

Memory 132 may include readable media in the form of volatile memory such as Random Access Memory (RAM) 1321 and/or cache memory 1322, and may further include Read Only Memory (ROM) 1323.

Memory 132 may also include a program/utility 1325 having a set (at least one) of program modules 1324, such program modules 1324 include, but are not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

The electronic device 130 may also communicate with one or more external devices 134 (e.g., keyboard, pointing device, etc.), one or more devices that enable a user to interact with the electronic device 130, and/or any device (e.g., router, modem, etc.) that enables the electronic device 130 to communicate with one or more other electronic devices. Such communication may occur through an input/output (I/O) interface 135. Also, electronic device 130 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 136. As shown, network adapter 136 communicates with other modules for electronic device 130 over bus 133. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 130, including, but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

In some possible embodiments, aspects of a particulate matter treatment method provided herein may also be implemented in the form of a program product comprising program code for causing a computer device to carry out the steps of a particulate matter treatment method according to various exemplary embodiments of the application as described herein when the program product is run on the computer device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The program product for monitoring of embodiments of the present application may employ a portable compact disc read only memory (CD-ROM) and include program code and may run on an electronic device. However, the program product of the present application is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the consumer electronic device, partly on the consumer electronic device, as a stand-alone software package, partly on the consumer electronic device, partly on the remote electronic device, or entirely on the remote electronic device or server. In the case of remote electronic devices, the remote electronic device may be connected to the consumer electronic device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external electronic device (e.g., connected through the internet using an internet service provider).

It should be noted that although several units or sub-units of the apparatus are mentioned in the above detailed description, such a division is merely exemplary and not mandatory. Indeed, the features and functions of two or more of the elements described above may be embodied in one element in accordance with embodiments of the present application. Conversely, the features and functions of one unit described above may be further divided into a plurality of units to be embodied.

Furthermore, although the operations of the methods of the present application are depicted in the drawings in a particular order, this is not required to or suggested that these operations must be performed in this particular order or that all of the illustrated operations must be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flowchart and/or block of the flowchart and block diagrams, and combinations of flowcharts and block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and block diagram block or blocks.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A particulate matter processing apparatus, comprising: the device comprises an aftertreatment device, a close-coupled oxidation catalytic converter CCDOC and a processor;

the processor is configured to:

Wherein the first threshold is greater than the second threshold.

2. The apparatus of claim 1, further comprising a selective catalytic conversion device CCSCR disposed between the CCDOC and the aftertreatment device, the CCSCR configured to control the conversion efficiency of NOx.

3. A method of particulate treatment, the method comprising:

wherein the first threshold is greater than the second threshold.

4. The method of claim 3, wherein controlling the in-cylinder post-engine nozzle to raise the current CCDOC downstream temperature to a preset downstream temperature comprises:

5. The method of claim 3, wherein the determining the first regenerated fuel injection amount based on the current DOC upstream temperature comprises:

6. The method of claim 5, wherein the determining the first regenerated fuel injection amount based on the first feed-forward fuel injection amount and the first feedback fuel injection amount comprises:

7. The method of claim 3, wherein said determining a second regenerated fuel injection amount based on a current ccoc upstream temperature comprises:

8. The method of claim 7, wherein said determining said second regenerated fuel injection amount based on said second feed-forward fuel injection amount and said second feedback fuel injection amount comprises:

9. An electronic device comprising at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 3-8.

10. A computer storage medium, characterized in that the computer storage medium stores a computer program for causing a computer to perform the method according to any one of claims 3-8.