CN112065598A - GPF regeneration control method and device for extended range vehicle - Google Patents
GPF regeneration control method and device for extended range vehicle Download PDFInfo
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- CN112065598A CN112065598A CN202010815851.7A CN202010815851A CN112065598A CN 112065598 A CN112065598 A CN 112065598A CN 202010815851 A CN202010815851 A CN 202010815851A CN 112065598 A CN112065598 A CN 112065598A
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- 230000008929 regeneration Effects 0.000 title claims abstract description 170
- 238000011069 regeneration method Methods 0.000 title claims abstract description 170
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000004606 Fillers/Extenders Substances 0.000 claims abstract description 98
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 92
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 92
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 34
- 239000001301 oxygen Substances 0.000 claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 4
- 239000004071 soot Substances 0.000 abstract description 24
- 239000002245 particle Substances 0.000 abstract description 17
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 description 6
- 239000013618 particulate matter Substances 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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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
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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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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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)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention discloses a GPF regeneration control method and a device for a range-extended vehicle, wherein the GPF regeneration control method for the range-extended vehicle comprises the following steps: acquiring the carbon content in GPF; acquiring a vehicle speed; controlling the working condition of the range extender based on the fact that the carbon content in the GPF reaches a first preset value and the vehicle speed is smaller than a second preset value, so that the working condition of the range extender reaches a GPF regeneration condition; and controlling the range extender to increase the oxygen content in the exhaust gas to carry out GPF regeneration. When the carbon load capacity of a vehicle reaches an active regeneration limit value, no matter whether the vehicle speed meets the condition or not, the engine is enabled to work under the load meeting the active regeneration condition by controlling the range extender, and then the GPF is actively regenerated, so that the opportunity of active regeneration is increased, and the oxidation of soot particles is accelerated; the soot amount in the GPF is not easy to accumulate in a large amount, the condition of GPF blockage is avoided, GPF active regeneration can be carried out even when the vehicle is stopped, and the performance of the vehicle is ensured.
Description
Technical Field
The invention belongs to the technical field of vehicle control, and particularly relates to a GPF regeneration control method and device for a range-extended vehicle.
Background
Direct injection engines are widely used in passenger vehicles due to their excellent power performance, fuel economy and emissions. However, the in-cylinder direct injection engine may cause the phenomenon of uneven oil-gas mixture to be serious, so that the number of particulate matter Particles (PN) and the particulate matter emission quality (PM) in the emission are remarkably increased, and with the release of the national six-emission regulation, the requirements of the national six standards on the particulate matter are strict under the background that the emission standard is increasingly strict, and the addition of a particulate filter (GPF) is an effective means for dealing with the particulate matter emission limit.
GPF is an extruded wall flow honeycomb ceramic structure. Particulate traps have evolved from flow-through three-way catalyst supports. The particulate trap has a plurality of parallel axial honeycomb cells, and adjacent cells are plugged alternately at both ends.
GPF realizes the purpose of removing soot by trapping soot particles in exhaust on a wall surface, but the continuous accumulation of soot particles can cause GPF blockage, and the problems of exhaust back pressure rise, engine fuel economy deterioration and the like are caused.
Compared with the traditional automobile, the extended-range automobile has more engine low-temperature start-stop working conditions, the continuous operation time of the engine is short, soot particles are easier to accumulate in GPF, and the opportunity of entering active regeneration is less. It is easy to cause the GPF to clog due to excessive soot accumulation, affecting vehicle performance.
Disclosure of Invention
The invention aims to provide a GPF regeneration control method and device for a range-extended vehicle, a storage medium and the vehicle, so as to solve the problem that the performance of the vehicle is influenced due to GPF blockage caused by excessive accumulation of soot particles of the GPF in the range-extended vehicle in the prior art.
To solve the above problem, a first aspect of the present invention provides a GPF regeneration control method for a range-extended vehicle, including: acquiring the carbon content in GPF; acquiring a vehicle speed; controlling the working condition of the range extender based on the fact that the carbon content in the GPF reaches a first preset value and the vehicle speed is smaller than a second preset value, so that the working condition of the range extender reaches the GPF regeneration condition; controlling the range extender to increase oxygen content in the exhaust gas to perform the GPF regeneration.
Optionally, the first preset value is thirty percent of the maximum carbon loading of the GPF.
Optionally, the second preset value is 40 km/h.
Optionally, the controlling the range extender based on that the carbon amount in the GPF is greater than or equal to a first preset value and the vehicle speed is less than a second preset value so that the working condition of the range extender reaches the GPF regeneration condition includes: and controlling the load of the engine of the range extender based on the carbon amount reaching a first preset value and the vehicle speed being smaller than a second preset value, so that the power of the engine meets the GPF regeneration condition.
Optionally, when the working condition of the range extender is controlled to reach the GPF regeneration condition, the method further includes: and using the energy generated by the running of the engine for the power battery recharging energy.
Optionally, when the working condition of the range extender is controlled not to reach the GPF regeneration condition, the method further includes: prohibiting engine shutdown and increasing power to the engine such that the power to the engine satisfies the conditions for GPF regeneration.
Optionally, the controlling the range extender to increase oxygen content in the exhaust gas, and performing the GPF regeneration includes: heating the GPF internal temperature to a regeneration temperature; controlling the engine air-fuel ratio and the firing angle increases the oxygen content in the exhaust gas.
Optionally, after controlling the range extender to increase the oxygen content in the exhaust gas and performing the GPF regeneration, the method further comprises: acquiring the carbon amount after GPF regeneration; and controlling the range extender to increase the oxygen content in the exhaust gas again based on the carbon amount after the GPF regeneration reaches the first preset value, and performing the GPF regeneration.
Optionally, after controlling the range extender to increase the oxygen content in the exhaust gas and performing the GPF regeneration, the method further comprises: acquiring the carbon amount after GPF regeneration; and controlling the range extender to normally start and stop according to the original strategy based on the fact that the carbon amount after the GPF regeneration does not reach a first preset value.
Optionally, the method further includes: and controlling the range extender to normally start and stop according to the original strategy based on the fact that the carbon content in the GPF does not reach a first preset value.
According to another aspect of the present invention, there is provided a GPF regeneration control apparatus for an extended range vehicle, comprising: the carbon amount detection module is used for acquiring the carbon amount in the GPF; the vehicle speed detection module is used for acquiring a vehicle speed; the range extender control module is used for controlling the working condition of the range extender based on that the carbon content in the GPF is more than or equal to a first preset value and the vehicle speed is less than a second preset value so as to enable the working condition of the range extender to reach the GPF regeneration condition; and the GPF regeneration module is used for controlling the range extender to increase the oxygen content in the exhaust gas and carrying out GPF regeneration.
Optionally, the first preset value is thirty percent of the maximum carbon loading of the GPF.
Optionally, the second preset value is 40 km/h.
Optionally, the range extender control module is specifically configured to control a load of an engine of the range extender based on that the carbon amount reaches a first preset value and the vehicle speed is less than a second preset value, so that the power of the engine meets the GPF regeneration condition.
Optionally, the method further includes: and the energy storage module is used for using the energy generated by the operation of the engine for supplementing the electric energy of the power battery.
Optionally, the range extender control module is further configured to prohibit an engine from being stopped and increase the power of the engine so that the power of the engine meets the GPF regeneration condition.
Optionally, the GPF regeneration module includes: a temperature control unit for heating the GPF internal temperature to a regeneration temperature; and an engine control unit for controlling the air-fuel ratio and the ignition angle of the engine to increase the oxygen content in the exhaust gas.
Optionally, the carbon amount detection module is further configured to obtain a carbon amount after GPF regeneration; the GPF regeneration module is further used for controlling the range extender to increase the oxygen content in the exhaust gas again based on the carbon amount after the GPF regeneration reaches a first preset value, and the GPF regeneration is carried out.
Optionally, the carbon amount detection module is further configured to obtain a carbon amount after GPF regeneration; and the range extender control module is also used for controlling the range extender to normally start and stop according to the original strategy based on the fact that the carbon content after the GPF regeneration does not reach a first preset value.
Optionally, the range extender control module is further configured to control the range extender to normally start and stop according to an original strategy based on that the carbon content in the GPF does not reach a first preset value.
According to a further aspect of the present invention, a storage medium is provided, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the steps of the method according to any one of the above-mentioned claims.
According to a further aspect of the present invention, there is provided a vehicle comprising a memory, a display, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of any one of the above aspects when executing the program.
When the carbon load capacity of the vehicle reaches the active regeneration limit value, no matter whether the vehicle speed meets the condition or not, the engine is enabled to work under the load meeting the active regeneration condition by controlling the range extender, and then the GPF is actively regenerated, so that the opportunity of active regeneration is increased, and the oxidation of soot particles is accelerated; the soot amount in the GPF is not easy to accumulate in a large amount, the GPF blockage is avoided, and the GPF can be actively regenerated even when the vehicle is stopped.
Drawings
FIG. 1 is a flow chart of a method of GPF regeneration control for an extended range vehicle according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a method of GPF regeneration control for an extended range vehicle according to an embodiment of the present invention;
fig. 3 is a block diagram schematically showing the structure of a GPF regeneration control device of the extended range vehicle according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Abbreviations mean:
VCU: a vehicle control unit;
EMS: an engine controller.
As shown in fig. 1, in a first aspect of the embodiment of the present invention, there is provided a GPF regeneration control method for an extended range vehicle, including:
s1: acquiring the carbon content in GPF;
s2: acquiring a vehicle speed;
s3: controlling the working condition of the range extender based on the fact that the carbon content in the GPF is larger than or equal to a first preset value and the vehicle speed is smaller than a second preset value, so that the working condition of the range extender reaches the GPF regeneration condition; wherein the first preset value is thirty percent of the maximum carbon loading of the GPF; the second preset value is 40 km/h.
When the prior art automobile carries out active regeneration, the automobile needs to be kept at a certain speed, for example, the speed is more than 40km/h, and the engine needs to run at a certain load, so that the prior art automobile can enter the active regeneration and carry out carbon cleaning work. And exiting the active regeneration when the condition is not met. This is because the engine of the vehicle in the prior art is a direct drive vehicle, and the vehicle cannot control the engine to keep high-speed and high-power operation when the vehicle speed is low, and the vehicle runs in an urban area, and the vehicle runs at a high speed in a very few cases, so that the chance of active regeneration of the vehicle is small, and the carbon cleaning speed is low.
The vehicle in this embodiment overcomes the problem that the vehicle of the prior art cannot perform GPF regeneration under low speed conditions, and this embodiment can perform GPF active regeneration even in a stopped state at a vehicle speed of 0 km/h. Greatly increases the opportunity of GPF active regeneration, has high carbon cleaning speed and ensures the performance of the vehicle. And based on the carbon content in the GPF reaching a first preset value and the vehicle speed being less than a second preset value, controlling the range extender so that the working condition of the range extender reaches the GPF regeneration condition comprises the following steps: and controlling the load of the engine of the range extender based on the carbon amount reaching a first preset value and the vehicle speed being less than a second preset value, so that the power of the engine meets the GPF regeneration condition. Because the engine of the extended range vehicle does not directly participate in driving, the engine can be kept working at a certain load when the vehicle is stopped, and the exhaust temperature and other conditions necessary for GPF active regeneration are ensured.
When the working condition of the range extender is controlled to reach the GPF regeneration condition, the method further comprises the following steps: and the energy generated by the running of the engine is used for supplementing the electric energy of the power battery. Because the engine of the range-extended vehicle does not directly participate in driving, the engine is connected with the generator, the range-extended vehicle has no power requirement in a low-speed or stop state, and the electric energy generated by the engine charges the power battery, so that energy loss is avoided.
However, if the range extender is controlled to be in a working condition which does not reach the GPF regeneration condition, the method further comprises the following steps: and forbidding the engine to stop and increasing the power of the engine so that the power of the engine meets the condition of GPF regeneration.
S4: and controlling the range extender to increase the oxygen content in the exhaust gas to carry out GPF regeneration. The method specifically comprises the following steps: heating the GPF internal temperature to a regeneration temperature; controlling the engine air-fuel ratio and firing angle increases the oxygen content in the exhaust. Specifically, when the amount of carbon in the GPF is accumulated to a limit value requiring active regeneration, the GPF active regeneration is required to remove carbon particles, and the GPF regeneration requires the engine to satisfy a plurality of conditions, such as a certain engine coolant temperature, a high exhaust temperature, a certain engine speed and load, and the like. After the conditions are met, the EMS controls the engine to adjust the ignition angle and the combustion air-fuel ratio to increase the oxygen content of exhaust gas and oxidize off soot particles in GPF. In an alternative embodiment of the invention, after controlling the range extender to increase the oxygen content in the exhaust gas and performing the GPF regeneration, the method further comprises: acquiring the carbon amount after GPF regeneration; and controlling the range extender again to increase the oxygen content in the exhaust gas based on the carbon amount after the GPF regeneration reaches the first preset value, and performing the GPF regeneration.
In an alternative embodiment of the invention, after controlling the range extender to increase the oxygen content in the exhaust gas and performing the GPF regeneration, the method further comprises: acquiring the carbon amount after GPF regeneration; and controlling the range extender to normally start and stop according to the original strategy based on the fact that the carbon content after GPF regeneration does not reach a first preset value.
In an optional embodiment of the present invention, the method further comprises: and controlling the range extender to normally start and stop according to the original strategy based on the fact that the carbon content in the GPF does not reach the first preset value.
When the carbon loading of the GPF of the vehicle reaches the active regeneration limit value in the embodiment, no matter whether the vehicle speed meets the condition, the engine is enabled to work under the load meeting the active regeneration condition by controlling the range extender, and then the GPF is actively regenerated, so that the opportunity of active regeneration is increased, and the oxidation of soot particles is accelerated; the soot amount in the GPF is not easy to accumulate in a large amount, so that the condition of GPF blockage is avoided; GPF active regeneration can be performed even when parking.
As shown in fig. 2, in an embodiment of the present invention, a GPF regeneration control method for an extended range vehicle is provided, including: acquiring the carbon content in GPF; acquiring a vehicle speed; when the carbon content in the GPF is larger than or equal to a first preset value and the vehicle speed is smaller than a second preset value, controlling the working condition of the range extender so that the working condition of the range extender reaches the GPF regeneration condition; controlling the range extender to increase the oxygen content in the exhaust gas, and performing GPF regeneration; the first preset value is thirty percent of the maximum carbon loading of the GPF; the second preset value is 40 km/h; controlling the range extender based on the carbon content in the GPF reaching a first preset value and the vehicle speed being less than a second preset value, so that the working condition of the range extender reaches the GPF regeneration condition, and the method comprises the following steps: when the carbon amount reaches a first preset value and the vehicle speed is less than a second preset value, controlling the load of the engine of the range extender so that the power of the engine meets the GPF regeneration condition; when the working condition of the range extender is controlled to reach the GPF regeneration condition, the method further comprises the following steps: the energy generated by the running of the engine is used for supplementing the electric energy of the power battery; when the working condition of the range extender is controlled not to reach the GPF regeneration condition, the method further comprises the following steps: prohibiting the engine from stopping and increasing the power of the engine so that the power of the engine meets the condition of GPF regeneration; controlling the range extender to increase oxygen content in the exhaust, performing GPF regeneration comprising: heating the GPF internal temperature to a regeneration temperature; controlling the engine air-fuel ratio and firing angle increases the oxygen content in the exhaust. After controlling the range extender to increase the oxygen content in the exhaust gas and performing the GPF regeneration, the method further comprises: acquiring the carbon amount after GPF regeneration; when the carbon content after GPF regeneration still reaches the first preset value, controlling the range extender again to increase the oxygen content in the exhaust gas, and performing GPF regeneration; after controlling the range extender to increase the oxygen content in the exhaust gas and performing the GPF regeneration, the method further comprises: acquiring the carbon amount after GPF regeneration; when the carbon amount after GPF regeneration does not reach a first preset value, controlling the range extender to start and stop normally according to the original strategy; and when the carbon content in the GPF does not reach a first preset value, controlling the range extender to start and stop normally according to the original strategy.
When the carbon loading of the GPF of the vehicle reaches the active regeneration limit value in the embodiment, no matter whether the vehicle speed meets the condition, the engine is enabled to work under the load meeting the active regeneration condition by controlling the range extender, and then the GPF is actively regenerated, so that the opportunity of active regeneration is increased, and the oxidation of soot particles is accelerated; the soot amount in the GPF is not easy to accumulate in a large amount, so that the condition of GPF blockage is avoided; GPF active regeneration can be performed even when parking. In addition, the engine of the range-extended vehicle does not directly participate in driving, the engine is connected with the generator, the range-extended vehicle does not have power requirements in a low-speed or parking state, and the electric energy generated by the engine charges the power battery, so that energy loss is avoided.
In another aspect of the embodiments of the present invention, there is provided a GPF regeneration control device for a range-extended vehicle, including: the carbon amount detection module is used for acquiring the carbon amount in the GPF; the vehicle speed detection module is used for acquiring a vehicle speed; the range extender control module is used for controlling the working condition of the range extender based on that the carbon content in the GPF is more than or equal to a first preset value and the vehicle speed is less than a second preset value so as to enable the working condition of the range extender to reach the GPF regeneration condition; and the GPF regeneration module is used for controlling the range extender to increase the oxygen content in the exhaust gas and carrying out GPF regeneration.
According to the device of the embodiment, when the carbon load of the vehicle reaches the active regeneration limit value, no matter whether the vehicle speed meets the condition or not, the engine is enabled to work under the load meeting the active regeneration condition by controlling the range extender, and then the GPF is actively regenerated, so that the opportunity of active regeneration is increased, and the oxidation of soot particles is accelerated; the soot amount in the GPF is not easy to accumulate in a large amount, the GPF blockage is avoided, and the GPF can be actively regenerated even when the vehicle is stopped. In this embodiment, the carbon amount detection module, the range extender control module and the GPF regeneration module may be functional modules of the EMS, or may be the EMS itself, and receive the allocation of the VCU; specifically, when the EMS detects that the carbon load in the GPF is high, the VCU sends a command to the EMS, controls the engine to stop (the vehicle speed is 0km/h), prohibits the engine from stopping, and keeps running under the state that the GPF active regeneration condition can be met.
Wherein the first preset value is thirty percent of the maximum carbon loading of the GPF.
Wherein the second preset value is 40 km/h. When the prior art automobile carries out active regeneration, the automobile needs to be kept at a certain speed, for example, the speed is more than 40km/h, and the engine needs to run at a certain load, so that the prior art automobile can enter the active regeneration and carry out carbon cleaning work. And exiting the active regeneration when the condition is not met. This is because the engine of the vehicle in the prior art is a direct drive vehicle, and the vehicle cannot control the engine to keep high-speed and high-power operation when the vehicle speed is low, and the vehicle runs in an urban area, and the vehicle runs at a high speed in a very few cases, so that the chance of active regeneration of the vehicle is small, and the carbon cleaning speed is low. The vehicle in this embodiment overcomes the problem that the vehicle of the prior art cannot perform GPF regeneration under low speed conditions, and this embodiment can perform GPF active regeneration even in a stopped state at a vehicle speed of 0 km/h. Greatly increases the opportunity of GPF active regeneration, has high carbon cleaning speed and ensures the performance of the vehicle.
The range extender control module is specifically used for controlling the load of the engine of the range extender based on the carbon amount reaching a first preset value and the vehicle speed being smaller than a second preset value, so that the power of the engine meets the GPF regeneration condition. Because the engine of the extended range vehicle does not directly participate in driving, the engine can be kept working at a certain load when the vehicle is stopped, and the exhaust temperature and other conditions necessary for GPF active regeneration are ensured.
Wherein, still include: and the energy storage module is used for using the energy generated by the running of the engine for supplementing the electric energy of the power battery. Because the engine of the range-extended vehicle does not directly participate in driving, the engine is connected with the generator, the range-extended vehicle has no power requirement in a low-speed or stop state, and the electric energy generated by the engine charges the power battery, so that energy loss is avoided.
The range extender control module is further used for forbidding the engine to stop and improving the power of the engine so that the power of the engine meets the GPF regeneration condition.
Wherein, GPF regeneration module includes: a temperature control unit for heating the GPF internal temperature to a regeneration temperature; and an engine control unit for controlling an air-fuel ratio and an ignition angle of the engine to increase an oxygen content in the exhaust gas. Specifically, when the amount of carbon in the GPF is accumulated to a limit value requiring active regeneration, the GPF active regeneration is required to remove carbon particles, and the GPF regeneration requires the engine to satisfy a plurality of conditions, such as a certain engine coolant temperature, a high exhaust temperature, a certain engine speed and load, and the like. After the conditions are met, the EMS controls the engine to adjust the ignition angle and the combustion air-fuel ratio to increase the oxygen content of exhaust gas and oxidize off soot particles in GPF.
The carbon amount detection module is also used for acquiring the carbon amount after GPF regeneration; and the GPF regeneration module is also used for controlling the range extender to increase the oxygen content in the exhaust gas again based on the carbon amount after the GPF regeneration reaches the first preset value, and carrying out the GPF regeneration.
The carbon amount detection module is also used for acquiring the carbon amount after GPF regeneration; and the range extender control module is also used for controlling the range extender to normally start and stop according to the original strategy based on the fact that the carbon content after GPF regeneration does not reach a first preset value.
The range extender control module is further used for controlling the range extender to normally start and stop according to the original strategy based on the fact that the carbon content in the GPF does not reach the first preset value.
In a further aspect of the embodiments of the present invention, a storage medium is provided, on which a computer program is stored, and the program, when executed by a processor, implements the steps of any one of the above-mentioned methods. After the program stored in the storage medium is executed by the processor, the carbon load of the vehicle can meet the active regeneration limit value, and no matter whether the vehicle speed meets the condition or not, the engine can meet the load work of the active regeneration condition by controlling the range extender, so that the active regeneration of GPF is carried out, the opportunity of the active regeneration is increased, and the oxidation of soot particles is accelerated; the soot amount in the GPF is not easy to accumulate in a large amount, so that the condition of GPF blockage is avoided; GPF active regeneration can be performed even when parking. The performance of the vehicle is ensured.
In a further aspect of the embodiments of the present invention, there is provided a vehicle comprising a memory, a display, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any one of the above methods when executing the program. When the carbon load capacity of the vehicle reaches the active regeneration limit value, no matter whether the vehicle speed meets the condition or not, the engine is enabled to meet the load work of the active regeneration condition by controlling the range extender, and then the active regeneration of GPF is carried out, so that the opportunity of the active regeneration is increased, and the oxidation of soot particles is accelerated; the soot amount in the GPF is not easy to accumulate in a large amount, so that the condition of GPF blockage is avoided; GPF active regeneration can be performed even when parking. The performance of the vehicle is ensured.
The invention aims to protect a GPF regeneration control method of a range-extended vehicle, which comprises the following steps: acquiring the carbon content in GPF; acquiring a vehicle speed; controlling the working condition of the range extender based on the fact that the carbon content in the GPF is larger than or equal to a first preset value and the vehicle speed is smaller than a second preset value, so that the working condition of the range extender reaches the GPF regeneration condition; and controlling the range extender to increase the oxygen content in the exhaust gas to carry out GPF regeneration. When the carbon load capacity of a vehicle reaches an active regeneration limit value, no matter whether the vehicle speed meets the condition or not, the engine is enabled to work under the load meeting the active regeneration condition by controlling the range extender, and then the GPF is actively regenerated, so that the opportunity of active regeneration is increased, and the oxidation of soot particles is accelerated; the soot amount in the GPF is not easy to accumulate in a large amount, so that the condition of GPF blockage is avoided; GPF active regeneration can be performed even when parking.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (15)
1. A GPF regeneration control method for a range-extended vehicle is characterized by comprising the following steps:
acquiring the carbon content in GPF;
acquiring a vehicle speed;
controlling the working condition of the range extender based on the fact that the carbon content in the GPF is larger than or equal to a first preset value and the vehicle speed is smaller than a second preset value, so that the working condition of the range extender reaches the GPF regeneration condition;
controlling the range extender to increase oxygen content in the exhaust gas to perform the GPF regeneration.
2. The method of claim 1, wherein the first preset value is thirty percent of the GPF maximum carbon loading.
3. The method according to claim 1, wherein the second preset value is 40 km/h.
4. The method of claim 1, wherein controlling a range extender such that operating conditions of the range extender meet the GPF regeneration conditions based on the carbon content in the GPF reaching a first preset value and the vehicle speed being less than a second preset value comprises:
and controlling the load of the engine of the range extender based on the carbon amount reaching a first preset value and the vehicle speed being smaller than a second preset value, so that the power of the engine meets the GPF regeneration condition.
5. The method of claim 1, wherein when the control range extender condition reaches the GPF regeneration condition, the method further comprises:
and using the energy generated by the running of the engine for the power battery recharging energy.
6. The method of claim 1, wherein when the control range extender operating condition fails the GPF regeneration condition, the method further comprises:
prohibiting engine shutdown and increasing power to the engine such that the power to the engine satisfies the conditions for GPF regeneration.
7. The method of claim 1, wherein the controlling the range extender to increase oxygen content in exhaust gas, performing the GPF regeneration comprises:
heating the GPF internal temperature to a regeneration temperature;
controlling the engine air-fuel ratio and the firing angle increases the oxygen content in the exhaust gas.
8. The method of claim 1, wherein the controlling the range extender to increase oxygen content in exhaust gas further comprises, after the GPF regeneration:
acquiring the carbon amount after GPF regeneration;
and controlling the range extender to increase the oxygen content in the exhaust gas again based on the carbon amount after the GPF regeneration reaches the first preset value, and performing the GPF regeneration.
9. The method of claim 1, wherein the controlling the range extender to increase oxygen content in exhaust gas further comprises, after the GPF regeneration:
acquiring the carbon amount after GPF regeneration;
and controlling the range extender to normally start and stop according to the original strategy based on the fact that the carbon amount after the GPF regeneration does not reach a first preset value.
10. The method according to any one of claims 1-9, further comprising:
and controlling the range extender to normally start and stop according to the original strategy based on the fact that the carbon content in the GPF does not reach a first preset value.
11. A GPF regeneration control device for a range-extended vehicle, comprising:
the carbon amount detection module is used for acquiring the carbon amount in the GPF;
the vehicle speed detection module is used for acquiring a vehicle speed;
the range extender control module is used for controlling the working condition of the range extender based on that the carbon content in the GPF is more than or equal to a first preset value and the vehicle speed is less than a second preset value so as to enable the working condition of the range extender to reach the GPF regeneration condition;
and the GPF regeneration module is used for controlling the range extender to increase the oxygen content in the exhaust gas and carrying out GPF regeneration.
12. The apparatus of claim 11, wherein the first preset value is thirty percent of the GPF maximum carbon load.
13. The apparatus of claim 11, wherein the second preset value is 40 km/h.
14. A storage medium, characterized in that the storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the method according to any one of claims 1-10.
15. A vehicle comprising a memory, a display, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of any one of claims 1 to 10 when the program is executed.
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