CN115355077B - Control method and control device for parking regeneration, readable storage medium and vehicle - Google Patents
Control method and control device for parking regeneration, readable storage medium and vehicle Download PDFInfo
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- CN115355077B CN115355077B CN202211167038.9A CN202211167038A CN115355077B CN 115355077 B CN115355077 B CN 115355077B CN 202211167038 A CN202211167038 A CN 202211167038A CN 115355077 B CN115355077 B CN 115355077B
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- 230000008929 regeneration Effects 0.000 title claims abstract description 92
- 238000011069 regeneration method Methods 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000002347 injection Methods 0.000 claims abstract description 132
- 239000007924 injection Substances 0.000 claims abstract description 132
- 239000007921 spray Substances 0.000 claims abstract description 12
- 239000000446 fuel Substances 0.000 claims description 112
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 41
- 229910052799 carbon Inorganic materials 0.000 claims description 41
- 239000013256 coordination polymer Substances 0.000 claims description 20
- 230000003993 interaction Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 description 32
- 230000003647 oxidation Effects 0.000 description 30
- 239000003054 catalyst Substances 0.000 description 16
- 239000002283 diesel fuel Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 238000010531 catalytic reduction reaction Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
- F01N3/0256—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases the fuel being ignited by electrical means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The application provides a control method, a control device, a readable storage medium and a vehicle for parking regeneration, wherein the control method comprises the following steps: under the condition that parking regeneration request information is received, determining whether the engine is in a cold start state; when the engine is in a cold start state, the burner is controlled to work in a first working mode until the exhaust temperature of the engine reaches a first preset temperature value, wherein the first working mode comprises that the oil nozzle sprays oil in a first oil injection quantity and the spark plug ignites; under the condition that the engine is not in a cold start state, the burner is controlled to work in a second working mode until the exhaust temperature reaches a second preset temperature value, wherein the second working mode comprises oil injection of an oil nozzle in a second oil injection quantity and intermittent ignition of an ignition plug, and therefore the problem that in the prior art, when parking regeneration is carried out, the exhaust temperature speed of the engine is improved to be lower is solved.
Description
Technical Field
The present invention relates to the field of parking regeneration, and in particular, to a control method and device for parking regeneration, a computer readable storage medium, and a vehicle.
Background
The pollutant emission standard of the motor vehicle in the sixth stage of the country (called as the national sixth standard for short) and the emission standard of the non-road national fourth engine (called as the non-fourth standard for short) have stricter limit on the emission of the particulate matters. And DPF (diesel particulate filter, dieselParticulate Filter, abbreviated as DPF) is an effective means for solving the problem of particulate matters of diesel engines, and can ensure that the emission of the particulate matters of diesel vehicles is maintained at a low level, thereby meeting the national six standards and non-four standards.
In practical applications, exhaust gas temperature of an engine needs to be raised through exhaust gas thermal management, so that DPF is regenerated. In the prior art, the hydrocarbon injection technology is adopted as an exhaust gas thermal management technology. Specifically, a hydrocarbon injection system is installed in front of a DOC (diesel oxidation catalyst, diesel Oxidation Catalyst, abbreviated as DOC) to inject diesel, so that the diesel is subjected to catalytic oxidation heat release in the DOC to raise the exhaust temperature. However, the above method has a problem in that it is slow to raise the exhaust temperature of the engine.
Therefore, there is a need for a method that can relatively quickly increase the exhaust temperature of the engine, thereby enabling the vehicle to complete the park regeneration.
Disclosure of Invention
The main objective of the present application is to provide a control method, a control device, a computer readable storage medium and a vehicle for parking regeneration, so as to solve the problem in the prior art that when parking regeneration is performed, the exhaust temperature speed of an engine is raised.
According to an aspect of the embodiment of the present invention, there is provided a control method of parking regeneration, including: under the condition that parking regeneration request information is received, determining whether the engine is in a cold start state; controlling a burner to operate in a first operation mode until the exhaust temperature of the engine reaches a first preset temperature value when the engine is in the cold start state, wherein the first operation mode comprises fuel injection by a fuel injection nozzle and ignition by a spark plug, the first fuel injection amount is determined at least based on the first preset temperature value, and the burner is positioned between an exhaust pipeline and a DOC of the engine; and under the condition that the engine is not in the cold start state, controlling the burner to work in a second working mode until the exhaust temperature reaches a second preset temperature value, wherein the second working mode comprises that the oil nozzle sprays oil in a second oil injection quantity and the spark plug performs intermittent ignition, the second oil injection quantity is determined at least based on the second preset temperature value, and the first preset temperature value is smaller than the second preset temperature value.
Optionally, in a case where the engine is in the cold start state, controlling the burner to operate in the first operation mode until after the exhaust temperature of the engine reaches a first preset temperature value, the control method further includes: and controlling the burner to work in the second working mode until the exhaust temperature reaches the second preset temperature value.
Optionally, after controlling the burner to operate in the second operation mode until the exhaust gas temperature reaches a second preset temperature value, the control method further includes: and controlling the burner to operate in a third operating mode, wherein the third operating mode comprises that the oil nozzle sprays oil in a third oil injection quantity and the spark plug does not ignite, and the third oil injection quantity is at least determined based on the specific heat capacity of exhaust gas at the DOC inlet, the exhaust gas mass flow, the DPF inlet temperature and the DOC carrier inlet temperature.
Optionally, after controlling the burner to operate in the third operation mode, the control method further includes: determining whether a current carbon loading value in the DPF is less than a preset carbon loading threshold; controlling the engine to exit a park regeneration state under the condition that the current carbon load value in the DPF is smaller than the preset carbon load threshold value; and controlling the burner to continue to operate in the third operating mode under the condition that the current carbon loading value in the DPF is greater than or equal to the preset carbon loading threshold value.
Optionally, the calculation method of the first injection amount is (T Setting 1 -T out )×CP EG,in ×m EG Wherein T is Setting 1 For the first preset temperature value, T out Is DPF inlet temperature, CP EG,in Specific heat capacity of DOC inlet exhaust gas, m EG Is the mass flow of the exhaust gas; the second injection quantity is calculated by (T) Setting 2 -T out )×CP EG,in ×m EG Wherein T is Setting 2 And the second preset temperature value.
Optionally, the calculation method of the third fuel injection amount is CP EG,in ×m EG ×(T out -T in )-KA×(T dem -T in ) Wherein, CP EG,in For the specific heat capacity, m, of the DOC inlet exhaust gas EG For the exhaust gas mass flow, T out For DPF inlet temperature, T in For the DOC carrier inlet temperature, T dem And KA is the coefficient of thermal interaction between DOC and the outside for the required temperature.
Optionally, the intermittent ignition of the spark plug is as follows: the ignition plug is ignited at predetermined intervals while the fuel injection nozzle is injecting the fuel at the second fuel injection amount a plurality of times in succession.
According to another aspect of the embodiment of the present invention, there is also provided a control device for parking regeneration, including: a receiving unit for determining whether the engine is in a cold start state or not in the case of receiving the parking regeneration request information; a first control unit for controlling a burner to operate in a first operation mode until an exhaust temperature of the engine reaches a first preset temperature value, in a case where the engine is in the cold start state, wherein the first operation mode includes an injection of fuel by a fuel injection nozzle with a first fuel injection amount and ignition by a spark plug, the first fuel injection amount being determined based at least on the first preset temperature value, the burner being located between an exhaust pipe of the engine and a DOC; and the first control unit is used for controlling the burner to work in a second working mode until the exhaust temperature reaches a second preset temperature value under the condition that the engine is not in the cold start state, wherein the second working mode comprises that the oil injection nozzle sprays oil in a second oil injection quantity and the spark plug performs intermittent ignition, the second oil injection quantity is determined at least based on the second preset temperature value, and the first preset temperature value is smaller than the second preset temperature value.
According to still 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 when executed by a processor implements any one of the control methods of parking regeneration.
According to still another aspect of the embodiment of the present invention, there is also provided a vehicle including: an engine; DOC; a burner located between an exhaust line of the engine and the DOC; a DPF located after the DOC; and the electronic control unit is used for controlling the engine and executing any one of the control methods of parking regeneration.
In the method for controlling the parking regeneration, under the condition that parking regeneration request information is received, whether an engine is in a cold start state or not is determined, and the working mode of a combustor is determined according to a determination result, namely, under the condition that the engine is in the cold start state, the combustor is controlled to work in a first working mode until the exhaust temperature of the engine reaches a first preset temperature value; and under the condition that the engine is not in the cold start state, controlling the burner to work in a second working mode until the exhaust temperature reaches a second preset temperature value. In the control method, when the engine is in a cold start state, the burner is controlled to work in a first working mode, namely, the oil nozzle of the burner is used for oil injection in a first oil injection quantity and the spark plug is used for ignition, so that the exhaust temperature of the engine can be quickly increased to a first preset temperature value. Under the condition that the engine is not in a cold start state, the burner is controlled to work in a second working mode, namely, the fuel injection nozzle of the burner injects fuel in a second fuel injection quantity and the spark plug is intermittently ignited, because the engine is not in the cold start state, namely, the exhaust gas of the engine has a certain temperature, the spark plug is intermittently ignited at the moment, the exhaust gas temperature of the engine can quickly reach a second preset temperature value through the oxidation of a DOC (diesel oxidation catalyst, diesel Oxidation Catalyst, abbreviated as DOC) and the ignition of the spark plug, and the DOC can be ensured to produce less carbon deposit on the oxidation of diesel, so that the efficiency of parking regeneration is ensured to be higher, and the problem that the exhaust gas temperature speed of the engine is lower when the parking regeneration is carried out in 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 application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 illustrates a flow chart of a control method of park regeneration according to one embodiment of the present application;
FIG. 2 shows a schematic structural diagram of the positional relationship of a burner according to an embodiment of the present application;
FIG. 3 illustrates a flow chart of whether to exit a park regeneration state according to one embodiment of the present application;
fig. 4 shows a schematic structural diagram of a control device for parking regeneration according to an embodiment of the present application;
fig. 5 shows a schematic structural diagram of a control device for parking regeneration according to another embodiment of the present application;
FIG. 6 illustrates a flow chart of a method of controlling regeneration of a particular embodiment of the present application.
Wherein the above figures include the following reference numerals:
10. a receiving unit; 20. a first control unit; 30. a second control unit; 40. a determination unit; 50. a fifth control unit; 60. a sixth control unit; 100. an exhaust line of the engine; 101. a burner; 102. DOC; 103. a DPF; 104. and (5) SCR.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, 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 one of ordinary skill in the art based on the embodiments herein 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 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 present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As described in the background art, in order to solve the above problem, in an exemplary embodiment of the present application, a control method, a control device, a computer readable storage medium, and a vehicle for parking regeneration are provided in the prior art, in which an exhaust temperature speed of an engine is raised slowly when the parking regeneration is performed.
According to an embodiment of the application, a control method for parking regeneration is provided.
Fig. 1 is a flowchart of a control method of parking regeneration according to an embodiment of the present application. The control method described above may be applied to an electronic control unit, as shown in fig. 1, and includes the steps of:
step S101, determining whether the engine is in a cold start state or not under the condition that parking regeneration request information is received;
step S102, when the engine is in the cold start state, controlling a burner to operate in a first operation mode until the exhaust temperature of the engine reaches a first preset temperature value, wherein the first operation mode comprises that an oil nozzle sprays oil in a first oil injection amount and an ignition plug ignites, the first oil injection amount is determined at least based on the first preset temperature value, and the burner is positioned between an exhaust pipeline of the engine and a DOC;
And step S103, controlling the burner to operate in a second operation mode until the exhaust temperature reaches a second preset temperature value when the engine is not in the cold start state, wherein the second operation mode comprises that the oil nozzle sprays oil in a second oil injection quantity and the spark plug performs intermittent ignition, the second oil injection quantity is determined at least based on the second preset temperature value, and the first preset temperature value is smaller than the second preset temperature value.
In the above-mentioned control method of parking regeneration, under the condition that the request information of parking regeneration is received, confirm whether the engine is in cold start state, and confirm the working pattern of the burner according to the result of the confirm, namely under the condition that the above-mentioned engine is in cold start state, control the burner to work with the first working pattern, until the exhaust temperature of the above-mentioned engine reaches the first preset temperature value; and controlling the burner to operate in a second working mode until the exhaust temperature reaches a second preset temperature value under the condition that the engine is not in the cold start state. In the control method, when the engine is in a cold start state, the burner is controlled to work in a first working mode, namely, the oil nozzle of the burner is used for oil injection in a first oil injection quantity and the spark plug is used for ignition, so that the exhaust temperature of the engine can be quickly increased to a first preset temperature value. Under the condition that the engine is not in a cold start state, the burner is controlled to work in a second working mode, namely, the fuel injection nozzle of the burner injects fuel in a second fuel injection quantity and the spark plug is intermittently ignited, because the engine is not in the cold start state, namely, the exhaust gas of the engine has a certain temperature, the spark plug is intermittently ignited at the moment, the exhaust gas temperature of the engine can quickly reach a second preset temperature value through the oxidation of a DOC (diesel oxidation catalyst, dieselOxidation Catalyst, abbreviated as DOC) and the ignition of the spark plug, and the DOC can be ensured to produce less carbon deposit on the oxidation of diesel, so that the efficiency of parking regeneration is ensured to be higher, and the problem that the exhaust gas temperature speed of the engine is lower when the parking regeneration is carried out in the prior art is solved.
In a specific embodiment of the present application, the first preset temperature value may be 250 ℃. Of course, the first preset temperature value is not limited to 250 ℃, and can be flexibly adjusted according to the actual situation of the engine. The second preset temperature value may be 500 ℃. Of course, the second preset temperature value is not limited to 500 ℃, and can be flexibly adjusted according to the actual condition of the engine.
Compared with the prior art, the control method for parking regeneration is characterized in that the hydrocarbon injection system is arranged in front of the DOC to inject diesel oil, so that the diesel oil is catalyzed, oxidized and released in the DOC to improve the exhaust temperature, and only a combustor is arranged between an exhaust pipeline of the engine and the DOC to improve the exhaust temperature of the engine, so that the exhaust system is simpler in structure and the cost is reduced.
In addition, in the control method for parking regeneration of the present application, the first fuel injection amount is determined based on the first preset temperature value, that is, the first fuel injection amount is determined according to the temperature to be reached by the exhaust gas of the engine, so that the exhaust gas temperature of the engine can be ensured to be quickly increased to the first preset temperature value, and the diesel consumption of the engine is ensured to be less, that is, the economical efficiency of the engine is ensured to be high. The second fuel injection amount is determined based on a second preset temperature value, that is, the second fuel injection amount is determined according to the temperature to be reached by the exhaust gas of the engine, so that the exhaust gas temperature of the engine can be ensured to be quickly increased to the second preset temperature value, and the diesel consumption of the engine is ensured to be less, that is, the economy price of the engine is high.
In a specific embodiment of the present application, as shown in fig. 2, a burner 101 is located between an exhaust line 100 of an engine and a DOC102, and a DPF103 is located between the DOC102 and an SCR104 (selective catalytic reduction system, selective Catalytic Reduction, SCR for short).
In another specific embodiment of the present application, the burner is controlled to operate in the second mode of operation until the exhaust temperature of the engine reaches a second preset temperature value, in the event that the current exhaust temperature of the engine has reached the first preset temperature value.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
In one embodiment of the present application, when the engine is in the cold start state, the control method further includes: and controlling the burner to operate in the second working mode until the exhaust temperature reaches the second preset temperature value. In this embodiment, after the exhaust temperature of the engine reaches the first preset temperature value, the burner is controlled to operate in the second operation mode, so that the DOC oxidizes the diesel and the injected diesel jointly provides hot gas, and the exhaust temperature of the engine is increased to the second preset temperature value relatively quickly. Because the spark plug is intermittently ignited, carbon deposition generated again by the combustion of diesel oil can be reduced, and the higher parking regeneration efficiency of the engine is further ensured.
In order to further reduce carbon deposition generated by ignition of diesel by the spark plug and further ensure higher efficiency of the parking regeneration, in another embodiment of the present application, after controlling the burner to operate in the second operation mode until the exhaust temperature reaches the second preset temperature value, the control method further includes: and controlling the burner to operate in a third operating mode, wherein the third operating mode comprises that the oil nozzle sprays oil in a third oil injection quantity and the spark plug does not ignite, and the third oil injection quantity is at least determined based on the specific heat capacity of exhaust gas at the DOC inlet, the exhaust gas mass flow, the DPF inlet temperature and the DOC carrier inlet temperature.
Specifically, in the above embodiment, the third fuel injection amount is determined at least based on the specific heat capacity of the exhaust gas at the DOC inlet, the exhaust gas mass flow, the DPF inlet temperature and the DOC carrier inlet temperature, and as each temperature is considered, the determined third fuel injection amount is ensured to be more reasonable, and further the fuel consumption of the engine is ensured to be lower and the economical efficiency is higher.
In yet another embodiment of the present application, as shown in fig. 3, after controlling the burner to operate in the third operation mode, the control method further includes: determining whether a current carbon loading value in the DPF is less than a preset carbon loading threshold; controlling the engine to exit a park regeneration state when the current carbon load value in the DPF is smaller than the preset carbon load threshold value; under the condition that the current carbon load value in the DPF is greater than or equal to the preset carbon load threshold value, the burner is controlled to continuously work in the third working mode, so that parking regeneration can be completed relatively quickly, and the use experience of a user is guaranteed to be relatively good.
In a specific embodiment of the present application, the method for calculating the first fuel injection amount is (T Setting 1 -T out )×CP EG,in ×m EG Wherein T is Setting 1 For the first preset temperature value, T out Is DPF inlet temperature, CP EG,in Specific heat capacity of DOC inlet exhaust gas, m EG Is the mass flow of the exhaust gas; the second injection amount is calculated by (T) Setting 2 -T out )×CP EG,in ×m EG Wherein T is Setting 2 Is the second preset temperature value.
In another specific embodiment of the present application, the method for calculating the third fuel injection amount is CP EG,in ×m EG ×(T out -T in )-KA×(T dem -T in ) Wherein, CP EG,in For the specific heat capacity of the DOC inlet exhaust gas, m EG T is the mass flow of the exhaust gas out For DPF inlet temperature, T in For the DOC carrier inlet temperature, T dem And KA is the coefficient of thermal interaction between DOC and the outside for the required temperature.
When the burner is operated in the second operation mode, since the exhaust gas of the engine has a certain temperature, in this case, the DOC may oxidize the diesel oil through the existing exhaust gas temperature of the engine, so as to further ensure that the efficiency of the parking regeneration is higher, in still another embodiment of the present application, the intermittent ignition performed by the spark plug is as follows: the ignition plug is ignited at predetermined intervals when the fuel injection nozzle injects the fuel at the second fuel injection amount a plurality of times in succession.
Specifically, the above-mentioned predetermined interval may be flexibly adjusted according to the actual situation of the engine, which is not limited in this application.
In a specific embodiment of the present application, the spark plug is configured to fire when the fuel is injected from the fuel injector of the burner. The intermittent ignition of the spark plug can be that the spark plug is ignited when the fuel nozzle of the burner is injected for the first time, the spark plug is not ignited when the fuel nozzle is injected for the second time, the spark plug is ignited when the fuel nozzle is injected for the third time, the spark plug is not ignited when the fuel nozzle is injected for the fourth time, and so on. Of course, the ignition plug may be ignited after the fuel injection nozzle injects fuel twice in succession. That is, the size of the predetermined interval is not limited in the present application, and the adjustment may be flexibly performed according to the actual exhaust temperature of the engine.
The embodiment of the application also provides a control device for parking regeneration, and it should be noted that the control device for parking regeneration in the embodiment of the application can be used for executing the control method for parking regeneration provided in the embodiment of the application. The following describes a control device for parking regeneration provided in the embodiment of the present application.
Fig. 4 is a schematic structural view of a control device for parking regeneration according to an embodiment of the present application. The control device described above may be applied to an electronic control unit, as shown in fig. 4, and includes:
A receiving unit 10 for determining whether the engine is in a cold start state in the case of receiving the parking regeneration request information;
a first control unit 20 for controlling the burner to operate in a first operation mode until the exhaust temperature of the engine reaches a first preset temperature value, in the case where the engine is in the cold start state, wherein the first operation mode includes the injection of fuel by a fuel injection nozzle with a first fuel injection amount and the ignition of a spark plug, the first fuel injection amount is determined based on at least the first preset temperature value, and the burner is located between an exhaust pipe of the engine and the DOC;
and a second control unit 30 for controlling the burner to operate in a second operation mode until the exhaust gas temperature reaches a second preset temperature value when the engine is not in the cold start state, wherein the second operation mode includes the fuel injection by the fuel injection nozzle and the intermittent ignition by the spark plug, the second fuel injection amount is determined based on at least the second preset temperature value, and the first preset temperature value is smaller than the second preset temperature value.
In the above control device for parking and regeneration, the receiving unit is configured to determine whether the engine is in a cold start state when receiving the parking and regeneration request information; the first control unit is used for controlling the burner to work in a first working mode under the condition that the engine is in a cold start state until the exhaust temperature of the engine reaches a first preset temperature value; and the second control unit is used for controlling the burner to work in a second working mode until the exhaust temperature reaches a second preset temperature value under the condition that the engine is not in the cold start state. In the control device, when the engine is in a cold start state, the burner is controlled to work in a first working mode, namely, the oil nozzle of the burner is used for oil injection in a first oil injection quantity and the spark plug is used for ignition, so that the exhaust temperature of the engine can be quickly increased to a first preset temperature value. Under the condition that the engine is not in a cold start state, the burner is controlled to work in a second working mode, namely, the fuel injection nozzle of the burner injects fuel in a second fuel injection quantity and the spark plug is intermittently ignited, because the engine is not in the cold start state, namely, the exhaust gas of the engine has a certain temperature, the spark plug is intermittently ignited at the moment, the exhaust gas temperature of the engine can quickly reach a second preset temperature value through the oxidation of a DOC (diesel oxidation catalyst, diesel Oxidation Catalyst, abbreviated as DOC) and the ignition of the spark plug, and the DOC can be ensured to produce less carbon deposit on the oxidation of diesel, so that the efficiency of parking regeneration is ensured to be higher, and the problem that the exhaust gas temperature of the engine is relatively slow when the parking regeneration is carried out in the prior art is solved.
In a specific embodiment of the present application, the first preset temperature value may be 250 ℃. Of course, the first preset temperature value is not limited to 250 ℃, and can be flexibly adjusted according to the actual situation of the engine. The second preset temperature value may be 500 ℃. Of course, the second preset temperature value is not limited to 500 ℃, and can be flexibly adjusted according to the actual condition of the engine.
Compared with the prior art, the control method executed by the control device for parking regeneration has the advantages that the hydrocarbon injection system is arranged in front of the DOC to inject diesel, and compared with the method for improving the exhaust temperature by catalyzing, oxidizing and releasing heat in the DOC by the diesel, the control method only needs to arrange the burner between the exhaust pipeline of the engine and the DOC to improve the exhaust temperature of the engine, so that the exhaust system structure is simpler, and the cost is reduced.
In addition, in the control device for parking and regeneration of the present application, the first fuel injection amount is determined based on the first preset temperature value, that is, the first fuel injection amount is determined according to the temperature to be reached by the exhaust gas of the engine, so that the exhaust gas temperature of the engine can be ensured to be quickly increased to the first preset temperature value, and the diesel consumption of the engine is ensured to be less, that is, the economical efficiency of the engine is ensured to be high. The second fuel injection amount is determined based on a second preset temperature value, that is, the second fuel injection amount is determined according to the temperature to be reached by the exhaust gas of the engine, so that the exhaust gas temperature of the engine can be ensured to be quickly increased to the second preset temperature value, and the diesel consumption of the engine is ensured to be less, that is, the economy price of the engine is high.
In a specific embodiment of the present application, as shown in fig. 2, a burner 101 is located between an exhaust line 100 of an engine and a DOC102, and a DPF103 is located between the DOC102 and an SCR104 (selective catalytic reduction system, selective Catalytic Reduction, SCR for short).
In another specific embodiment of the present application, the burner is controlled to operate in the second mode of operation until the exhaust temperature of the engine reaches a second preset temperature value, in the event that the current exhaust temperature of the engine has reached the first preset temperature value.
In an embodiment of the present application, the control device further includes a third control unit, configured to control the burner to operate in a first operation mode when the engine is in the cold start state, until the exhaust temperature of the engine reaches a first preset temperature value, and control the burner to operate in the second operation mode until the exhaust temperature reaches the second preset temperature value. In this embodiment, after the exhaust temperature of the engine reaches the first preset temperature value, the burner is controlled to operate in the second operation mode, so that the DOC oxidizes the diesel and the injected diesel jointly provides hot gas, and the exhaust temperature of the engine is increased to the second preset temperature value relatively quickly. Because the spark plug is intermittently ignited, carbon deposition generated again by the combustion of diesel oil can be reduced, and the higher parking regeneration efficiency of the engine is further ensured.
In order to further reduce carbon deposition caused by ignition of diesel fuel by the spark plug and further ensure a higher efficiency of the park regeneration, in another embodiment of the present application, the control device further comprises a fourth control unit for controlling the burner to operate in a second operation mode until the exhaust temperature reaches a second preset temperature value, and controlling the burner to operate in a third operation mode, wherein the third operation mode comprises that the fuel injection nozzle injects fuel in a third fuel injection amount and the spark plug does not ignite, and the third fuel injection amount is determined based on at least the specific heat capacity of the DOC inlet exhaust gas, the exhaust gas mass flow, the DPF inlet temperature and the DOC carrier inlet temperature.
Specifically, in the above embodiment, the third fuel injection amount is determined at least based on the specific heat capacity of the exhaust gas at the DOC inlet, the exhaust gas mass flow, the DPF inlet temperature and the DOC carrier inlet temperature, and as each temperature is considered, the determined third fuel injection amount is ensured to be more reasonable, and further the fuel consumption of the engine is ensured to be lower and the economical efficiency is higher.
In yet another embodiment of the present application, as shown in fig. 5, the control device further includes a determining unit 40, a fifth control unit 50, and a sixth control unit 60, where the determining unit 40 is configured to determine whether the current carbon loading value in the DPF is less than a preset carbon loading threshold value after controlling the burner to operate in the third operation mode; the fifth control unit 50 is configured to control the engine to exit the park regeneration state when the current carbon load value in the DPF is less than the preset carbon load threshold; the sixth control unit 60 is configured to control the burner to continue to operate in the third operation mode when the current carbon loading value in the DPF is greater than or equal to the preset carbon loading threshold value, so that the parking regeneration can be completed relatively quickly, and a better use experience of a user is ensured.
In a specific embodiment of the present application, the method for calculating the first fuel injection amount is (T Setting 1 -T out )×CP EG,in ×m EG Wherein T is Setting 1 For the first preset temperature value, T out Is DPF inlet temperature, CP EG,in Specific heat capacity of DOC inlet exhaust gas, m EG Is the mass flow of the exhaust gas; the second injection amount is calculated by (T) Setting 2 -T out )×CP EG,in ×m EG Wherein T is Setting 2 Is the second preset temperature value.
Another of the present applicationIn a specific embodiment, the method for calculating the third fuel injection amount is CP EG,in ×m EG ×(T out -T in )-KA×(T dem -T in ) Wherein, CP EG,in For the specific heat capacity of the DOC inlet exhaust gas, m EG T is the mass flow of the exhaust gas out For DPF inlet temperature, T in For the DOC carrier inlet temperature, T dem And KA is the coefficient of thermal interaction between DOC and the outside for the required temperature.
When the burner is operated in the second operation mode, since the exhaust gas of the engine has a certain temperature, in this case, the DOC may oxidize the diesel oil through the existing exhaust gas temperature of the engine, so as to further ensure that the efficiency of the parking regeneration is higher, in still another embodiment of the present application, the intermittent ignition performed by the spark plug is as follows: the ignition plug is ignited at predetermined intervals when the fuel injection nozzle injects the fuel at the second fuel injection amount a plurality of times in succession.
Specifically, the above-mentioned predetermined interval may be flexibly adjusted according to the actual situation of the engine, which is not limited in this application.
In a specific embodiment of the present application, the spark plug is configured to fire when the fuel is injected from the fuel injector of the burner. The intermittent ignition of the spark plug can be that the spark plug is ignited when the fuel nozzle of the burner is injected for the first time, the spark plug is not ignited when the fuel nozzle is injected for the second time, the spark plug is ignited when the fuel nozzle is injected for the third time, the spark plug is not ignited when the fuel nozzle is injected for the fourth time, and so on. Of course, the ignition plug may be ignited after the fuel injection nozzle injects fuel twice in succession. That is, the size of the predetermined interval is not limited in the present application, and the adjustment may be flexibly performed according to the actual exhaust temperature of the engine.
The control device for parking and regeneration comprises a processor and a memory, wherein the receiving unit, the first control unit, the second control unit and the like are all 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 that in the prior art, when parking regeneration is carried out, the exhaust temperature of an engine is improved is solved by adjusting the parameters of the inner core.
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 which, when executed by a processor, implements the above-described control method of parking regeneration.
The embodiment of the invention provides a processor which is used for running a program, wherein the control method for parking regeneration is executed when the program runs.
In an exemplary embodiment of the present application, there is also provided a vehicle including an engine, a DOC, a burner, a DPF, and an electronic control unit, wherein the burner is located between an exhaust line of the engine and the DOC; the DPF is positioned after the DOC; the electronic control unit is used for controlling the engine, and the electronic control unit is also used for executing any one of the control methods for parking regeneration.
The vehicle includes the electronic control unit, and the electronic control unit is further configured to execute any one of the control methods of parking regeneration. In the control method, under the condition that parking regeneration request information is received, whether the engine is in a cold start state is determined, and the working mode of the burner is determined according to the determination result, namely, under the condition that the engine is in the cold start state, the burner is controlled to work in a first working mode until the exhaust temperature of the engine reaches a first preset temperature value; and controlling the burner to operate in a second working mode until the exhaust temperature reaches a second preset temperature value under the condition that the engine is not in the cold start state. In the control method, when the engine is in a cold start state, the burner is controlled to work in a first working mode, namely, the oil nozzle of the burner is used for oil injection in a first oil injection quantity and the spark plug is used for ignition, so that the exhaust temperature of the engine can be quickly increased to a first preset temperature value. Under the condition that the engine is not in a cold start state, the burner is controlled to work in a second working mode, namely, the fuel injection nozzle of the burner injects fuel in a second fuel injection quantity and the spark plug is intermittently ignited, because the engine is not in the cold start state, namely, the exhaust gas of the engine has a certain temperature, the spark plug is intermittently ignited at the moment, the exhaust gas temperature of the engine can quickly reach a second preset temperature value through the oxidation of a DOC (diesel oxidation catalyst, diesel Oxidation Catalyst, abbreviated as DOC) and the ignition of the spark plug, and the DOC can be ensured to produce less carbon deposit on the oxidation of diesel, so that the efficiency of parking regeneration is ensured to be higher, and the problem that the exhaust gas temperature speed of the engine is lower when the parking regeneration is carried out in the prior art is solved.
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, determining whether the engine is in a cold start state or not under the condition that parking regeneration request information is received;
step S102, when the engine is in the cold start state, controlling a burner to operate in a first operation mode until the exhaust temperature of the engine reaches a first preset temperature value, wherein the first operation mode comprises that an oil nozzle sprays oil in a first oil injection amount and an ignition plug ignites, the first oil injection amount is determined at least based on the first preset temperature value, and the burner is positioned between an exhaust pipeline of the engine and a DOC;
and step S103, controlling the burner to operate in a second operation mode until the exhaust temperature reaches a second preset temperature value when the engine is not in the cold start state, wherein the second operation mode comprises that the oil nozzle sprays oil in a second oil injection quantity and the spark plug performs intermittent ignition, the second oil injection quantity is determined at least based on the second preset temperature value, and the first preset temperature value is smaller than the second preset temperature value.
The device herein may be a server, PC, PAD, cell phone, etc.
The present application also provides a computer program product adapted to perform a program initialized with at least the following method steps when executed on a data processing device:
step S101, determining whether the engine is in a cold start state or not under the condition that parking regeneration request information is received;
step S102, when the engine is in the cold start state, controlling a burner to operate in a first operation mode until the exhaust temperature of the engine reaches a first preset temperature value, wherein the first operation mode comprises that an oil nozzle sprays oil in a first oil injection amount and an ignition plug ignites, the first oil injection amount is determined at least based on the first preset temperature value, and the burner is positioned between an exhaust pipeline of the engine and a DOC;
and step S103, controlling the burner to operate in a second operation mode until the exhaust temperature reaches a second preset temperature value when the engine is not in the cold start state, wherein the second operation mode comprises that the oil nozzle sprays oil in a second oil injection quantity and the spark plug performs intermittent ignition, the second oil injection quantity is determined at least based on the second preset temperature value, and the first preset temperature value is smaller than the second preset temperature value.
In order that those skilled in the art can more clearly understand the technical solutions of the present application, the technical solutions and technical effects of the present application will be described below with reference to specific embodiments.
Examples
The present embodiment relates to a control method of parking regeneration, as shown in fig. 6. In the case where the parking regeneration request information is received, it is determined whether the engine is in a cold start state. And if the engine is in a cold start state, controlling the burner to work in a first working mode until the exhaust temperature of the engine reaches a first preset temperature value. Namely, the fuel injection nozzle of the burner injects fuel in a first fuel injection quantity and the spark plug ignites, so that the exhaust temperature of the engine is increased more quickly. In the event that the engine is not in a cold start or the exhaust temperature of the engine has reached a first preset temperature value, the burner is controlled to operate in a second mode of operation until the exhaust temperature of the engine reaches a second preset temperature value. I.e. the fuel injection nozzle of the burner injects fuel in a second fuel injection quantity and the spark plug is intermittently ignited. Since the exhaust gas of the engine already has a certain temperature at this time, heat can be supplied together by the oxidation reaction of the DOC and the ignition of the burner. When the exhaust temperature of the engine reaches a second preset temperature value, the burner is controlled to operate in a third working mode, namely, the fuel injection nozzle of the burner is injected with a third fuel injection quantity and the spark plug is not ignited. Since the exhaust temperature of the engine has now reached the second preset temperature threshold, heat may now be provided by the oxidation reaction of the DOC. Finally, determining whether the current carbon loading value in the DPF is smaller than a preset carbon loading threshold value; controlling the engine to exit the parking regeneration state under the condition that the current carbon load value in the DPF is smaller than a preset carbon load threshold value; and controlling the burner to continuously operate in the third operation mode under the condition that the current carbon loading value in the DPF is greater than or equal to the preset carbon loading threshold value.
In the foregoing embodiments of the present invention, 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 content 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 control method for parking regeneration, under the condition that parking regeneration request information is received, whether an engine is in a cold start state is determined, and the working mode of a combustor is determined according to a determination result, namely, under the condition that the engine is in the cold start state, the combustor is controlled to work in a first working mode until the exhaust temperature of the engine reaches a first preset temperature value; and controlling the burner to operate in a second working mode until the exhaust temperature reaches a second preset temperature value under the condition that the engine is not in the cold start state. In the control method, when the engine is in a cold start state, the burner is controlled to work in a first working mode, namely, the oil nozzle of the burner is used for oil injection in a first oil injection quantity and the spark plug is used for ignition, so that the exhaust temperature of the engine can be quickly increased to a first preset temperature value. Under the condition that the engine is not in a cold start state, the burner is controlled to work in a second working mode, namely, the fuel injection nozzle of the burner injects fuel in a second fuel injection quantity and the spark plug is intermittently ignited, because the engine is not in the cold start state, namely, the exhaust gas of the engine has a certain temperature, the spark plug is intermittently ignited at the moment, the exhaust gas temperature of the engine can quickly reach a second preset temperature value through the oxidation of a DOC (diesel oxidation catalyst, diesel Oxidation Catalyst, abbreviated as DOC) and the ignition of the spark plug, and the DOC can be ensured to produce less carbon deposit on the oxidation of diesel, so that the efficiency of parking regeneration is ensured to be higher, and the problem that the exhaust gas temperature speed of the engine is lower when the parking regeneration is carried out in the prior art is solved.
2) In the control device for parking regeneration of the present application, the receiving unit is configured to determine whether the engine is in a cold start state when receiving the parking regeneration request information; the first control unit is used for controlling the burner to work in a first working mode under the condition that the engine is in a cold start state until the exhaust temperature of the engine reaches a first preset temperature value; and the second control unit is used for controlling the burner to work in a second working mode until the exhaust temperature reaches a second preset temperature value under the condition that the engine is not in the cold start state. In the control device, when the engine is in a cold start state, the burner is controlled to work in a first working mode, namely, the oil nozzle of the burner is used for oil injection in a first oil injection quantity and the spark plug is used for ignition, so that the exhaust temperature of the engine can be quickly increased to a first preset temperature value. Under the condition that the engine is not in a cold start state, the burner is controlled to work in a second working mode, namely, the fuel injection nozzle of the burner injects fuel in a second fuel injection quantity and the spark plug is intermittently ignited, because the engine is not in the cold start state, namely, the exhaust gas of the engine has a certain temperature, the spark plug is intermittently ignited at the moment, the exhaust gas temperature of the engine can quickly reach a second preset temperature value through the oxidation of a DOC (diesel oxidation catalyst, diesel Oxidation Catalyst, abbreviated as DOC) and the ignition of the spark plug, and the DOC can be ensured to produce less carbon deposit on the oxidation of diesel, so that the efficiency of parking regeneration is ensured to be higher, and the problem that the exhaust gas temperature of the engine is relatively slow when the parking regeneration is carried out in the prior art is solved.
3) The vehicle of the application comprises the electronic control unit, and the electronic control unit is also used for executing any one of the control methods for parking regeneration. In the control method, under the condition that parking regeneration request information is received, whether the engine is in a cold start state is determined, and the working mode of the burner is determined according to the determination result, namely, under the condition that the engine is in the cold start state, the burner is controlled to work in a first working mode until the exhaust temperature of the engine reaches a first preset temperature value; and controlling the burner to operate in a second working mode until the exhaust temperature reaches a second preset temperature value under the condition that the engine is not in the cold start state. In the control method, when the engine is in a cold start state, the burner is controlled to work in a first working mode, namely, the oil nozzle of the burner is used for oil injection in a first oil injection quantity and the spark plug is used for ignition, so that the exhaust temperature of the engine can be quickly increased to a first preset temperature value. Under the condition that the engine is not in a cold start state, the burner is controlled to work in a second working mode, namely, the fuel injection nozzle of the burner injects fuel in a second fuel injection quantity and the spark plug is intermittently ignited, because the engine is not in the cold start state, namely, the exhaust gas of the engine has a certain temperature, the spark plug is intermittently ignited at the moment, the exhaust gas temperature of the engine can quickly reach a second preset temperature value through the oxidation of a DOC (diesel oxidation catalyst, diesel Oxidation Catalyst, abbreviated as DOC) and the ignition of the spark plug, and the DOC can be ensured to produce less carbon deposit on the oxidation of diesel, so that the efficiency of parking regeneration is ensured to be higher, and the problem that the exhaust gas temperature speed of the engine is lower when the parking regeneration is carried out in the prior art is solved.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (9)
1. A control method of parking regeneration, characterized by comprising:
under the condition that parking regeneration request information is received, determining whether the engine is in a cold start state;
controlling a burner to operate in a first operation mode until the exhaust temperature of the engine reaches a first preset temperature value when the engine is in the cold start state, wherein the first operation mode comprises fuel injection by a fuel injection nozzle and ignition by a spark plug, the first fuel injection amount is determined at least based on the first preset temperature value, and the burner is positioned between an exhaust pipeline and a DOC of the engine;
controlling the burner to operate in a second operation mode until the exhaust gas temperature reaches a second preset temperature value when the engine is not in the cold start state, wherein the second operation mode includes the fuel injection by the fuel injection nozzle with a second fuel injection amount and the intermittent ignition by the spark plug, the second fuel injection amount is determined at least based on the second preset temperature value, the first preset temperature value is smaller than the second preset temperature value, and after controlling the burner to operate in the second operation mode until the exhaust gas temperature reaches the second preset temperature value, the control method further includes: and controlling the burner to operate in a third operating mode, wherein the third operating mode comprises that the oil nozzle sprays oil in a third oil injection quantity and the spark plug does not ignite, and the third oil injection quantity is at least determined based on the specific heat capacity of exhaust gas at the DOC inlet, the exhaust gas mass flow, the DPF inlet temperature and the DOC carrier inlet temperature.
2. The control method according to claim 1, characterized in that, in a case where the engine is in the cold start state, the burner is controlled to operate in the first operation mode until after the exhaust gas temperature of the engine reaches a first preset temperature value, the control method further comprising:
and controlling the burner to work in the second working mode until the exhaust temperature reaches the second preset temperature value.
3. The control method according to claim 1, characterized in that after controlling the burner to operate in the third operation mode, the control method further comprises:
determining whether a current carbon loading value in the DPF is less than a preset carbon loading threshold;
controlling the engine to exit a park regeneration state under the condition that the current carbon load value in the DPF is smaller than the preset carbon load threshold value;
and controlling the burner to continue to operate in the third operating mode under the condition that the current carbon loading value in the DPF is greater than or equal to the preset carbon loading threshold value.
4. The control method according to claim 1, wherein,
the first injection quantity is calculated by (T) Setting 1 -T out )×CP EG,in ×m EG Wherein T is Setting 1 For the first preset temperature value, T out Is DPF inlet temperature, CP EG,in Specific heat capacity of DOC inlet exhaust gas, m EG Is the mass flow of the exhaust gas;
the second injection quantity is calculated by (T) Setting 2 -T out )×CP EG,in ×m EG Wherein T is Setting 2 And the second preset temperature value.
5. The control method according to claim 1, characterized in that the third fuel injection amount is calculated as CP EG,in ×m EG ×(T out -T in )-KA×(T dem -T in ) Wherein, CP EG,in For the specific heat capacity, m, of the DOC inlet exhaust gas EG For the exhaust gas mass flow, T out For DPF inlet temperature, T in For the DOC carrier inlet temperature, T dem And KA is the coefficient of thermal interaction between DOC and the outside for the required temperature.
6. The control method according to claim 1, wherein the intermittent ignition by the spark plug is: the ignition plug is ignited at predetermined intervals while the fuel injection nozzle is injecting the fuel at the second fuel injection amount a plurality of times in succession.
7. A control device for parking regeneration, characterized by comprising:
a receiving unit for determining whether the engine is in a cold start state or not in the case of receiving the parking regeneration request information;
a first control unit for controlling a burner to operate in a first operation mode until an exhaust temperature of the engine reaches a first preset temperature value, in a case where the engine is in the cold start state, wherein the first operation mode includes an injection of fuel by a fuel injection nozzle with a first fuel injection amount and ignition by a spark plug, the first fuel injection amount being determined based at least on the first preset temperature value, the burner being located between an exhaust pipe of the engine and a DOC;
And a second control unit configured to control the burner to operate in a second operation mode until the exhaust gas temperature reaches a second preset temperature value when the engine is not in the cold start state, wherein the second operation mode includes fuel injection by the fuel injection nozzle and intermittent ignition by the spark plug, the second fuel injection amount is determined based at least on the second preset temperature value, the first preset temperature value is smaller than the second preset temperature value, and the control device further includes a fourth control unit configured to control the burner to operate in a third operation mode after controlling the burner to operate in the second operation mode until the exhaust gas temperature reaches the second preset temperature value, wherein the third operation mode includes fuel injection by the fuel injection nozzle and no ignition by the spark plug, the third fuel injection amount is determined based at least on a specific heat capacity of DOC inlet exhaust gas, an exhaust gas mass flow, a DPF inlet temperature, and a DOC inlet temperature.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein the program, when executed by a processor, implements the control method of parking regeneration according to any one of claims 1 to 6.
9. A vehicle, characterized by comprising:
an engine;
DOC；
a burner located between an exhaust line of the engine and the DOC;
a DPF located after the DOC;
an electronic control unit for controlling the engine, the electronic control unit further being configured to execute the control method of parking regeneration according to any one of claims 1 to 6.
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