CN116291927A - Diesel engine heat management system and heat management control method - Google Patents
Diesel engine heat management system and heat management control method Download PDFInfo
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- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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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
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- 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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- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
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- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Abstract
The invention discloses a diesel engine thermal management system and a thermal management control method. The system comprises: the device comprises a diesel engine, a gas circuit executor, a post-processing device, at least one temperature sensor and a thermal management control device; each of the temperature sensors is used for detecting the working temperature of at least one position of the aftertreatment device; the thermal management control device is used for determining a target combustion mode of the diesel engine according to the working temperature, adjusting the current combustion mode of the diesel engine according to the target combustion mode and controlling the air path executor. According to the scheme provided by the embodiment of the invention, different combustion modes are distinguished through the temperature of the post-processing device, the diesel engine is controlled to enter the target combustion mode, the air path executor is enabled to execute corresponding control operation so as to meet the temperature discharge requirements under different combustion modes, hidden dangers are avoided through a reasonable thermal management mode, and the thermal management capability of the diesel engine is improved.
Description
Technical Field
The invention relates to the technical field of diesel engines, in particular to a thermal management system of a diesel engine and a thermal management control method thereof.
Background
The current solution to the emission problem of diesel engines is to provide an after-treatment device in the exhaust line, such as for example an after-treatment device consisting of a diesel exhaust oxidation catalyst (DieselOxidationCatalyst, DOC), a diesel particulate filter (DieselParticulateFilter, DPF), a selective catalytic reduction device (SelectiveCatalystReduction, SCR) and an ammonia slip catalyst (AmmoniaSlipCatalyst, ASC). The existing thermal management means are mainly two, namely, by reducing the air inflow of a specific engine working condition, combustion is deteriorated, the thermal efficiency of the engine is reduced, more heat is discharged out of the engine, and the internal temperature of a post-processor is further improved; another form of fuel injection through a post-injector or HC nozzle allows this fuel to take part in little or no combustion, but to ignite in the DOC, actively increasing the internal temperature of the post-processor.
Only in terms of the mode that the air path executor raises the temperature of the post-processor, the oil consumption of the diesel engine is obviously increased in the heat management process, and the hidden troubles of loose sealing of the supercharger, burning out of the oil nozzle of the oil injector and the like exist due to the excessively high pressure before low-load vortex; the exhaust temperature is improved by changing the opening of the throttle valve and the opening of the air release valve of the supercharger, but the effect of the air release valve of the supercharger on improving the exhaust temperature is weak when the diesel engine is under small load, and too low intake negative pressure can be introduced into the opening of the throttle valve, so that hidden dangers such as oil leakage at the sealing positions of the supercharger and the air valve are generated. Therefore, there is a need for a diesel thermal management method to address the potential hazards of existing diesel thermal management.
Disclosure of Invention
The invention provides a diesel engine thermal management system and a thermal management control method thereof, which aim to solve the hidden trouble in the existing diesel engine thermal management.
According to an aspect of the present invention, there is provided a diesel engine thermal management system comprising: the device comprises a diesel engine, a gas circuit executor, a post-processing device, at least one temperature sensor and a thermal management control device;
each of the temperature sensors is used for detecting the working temperature of at least one position of the aftertreatment device;
the thermal management control device is used for determining a target combustion mode of the diesel engine according to the working temperature, adjusting the current combustion mode of the diesel engine according to the target combustion mode and controlling the air path executor.
Optionally, the air path executor includes: a turbocharger, a cooler, a turbocharger electronic throttle valve THR, a turbocharger bleed valve EAWG and an electronically controlled exhaust throttle valve ETV;
the engine aftertreatment device comprises DOC, DFP, SCR and ASC which are sequentially connected, and the DOC is connected with an electronic control exhaust throttle valve ETV;
the temperature sensor comprises a first temperature sensor arranged at the front end of the DOC, a second temperature sensor arranged between the rear end of the DOC and the front end of the DPF, a third temperature sensor arranged between the rear end of the DPF and the front end of the SCR, and a fourth temperature sensor arranged between the rear end of the SCR and the ASC; the first temperature sensor is used for detecting the DOC front temperature, the second temperature sensor is used for detecting the DPF front temperature, the third temperature sensor is used for detecting the SCR front temperature, and the fourth temperature sensor is used for detecting the ASC front temperature.
Optionally, the thermal management control device includes: the device comprises a combustion mode selection module, a control mode selection module, a gas circuit executor control module, a main spray parameter control module and a post-spray parameter control module;
the combustion mode selection module is used for determining the target combustion mode according to the detection result of the temperature sensor;
the control mode selection module is used for determining target control parameters of the air path executor according to the target combustion mode;
the air channel actuator control module is used for controlling the air channel actuator according to the target control parameter;
the main injection parameter control module is used for controlling main injection parameters of the diesel engine according to the target combustion mode;
the post-injection parameter control module is used for controlling the post-injection parameters of the diesel engine according to the target combustion mode.
Optionally, the combustion mode selection module is configured to perform:
determining whether a carbon charge of the diesel engine is greater than a preset carbon charge threshold;
determining whether the temperature of the third temperature sensor is greater than a preset first temperature threshold when the carbon load threshold is not greater than, and if so, controlling the diesel engine to enter a first combustion mode representing a standard combustion mode of the diesel engine; if the temperature of the fuel is not greater than the first temperature threshold, controlling the diesel engine to enter a second combustion mode used for SCR heating;
Determining if the temperature of the first temperature sensor is greater than a preset second temperature threshold when greater than the carbon loading threshold, and if so, controlling the diesel engine to enter a third combustion mode characterized for DOC heating; and if the temperature is not greater than the second temperature threshold value, controlling the diesel engine to enter a fourth combustion mode for DPF regeneration.
Optionally, the combustion mode selection module is further configured to perform:
acquiring a temperature value of the third temperature sensor in real time when the carbon loading of the diesel engine is not greater than the carbon loading threshold and the diesel engine is in the second combustion mode;
when the temperature value of the third temperature sensor is larger than a preset third temperature threshold value, controlling the diesel engine to enter the first combustion mode, wherein the third temperature threshold value is larger than the first temperature threshold value;
the method comprises the steps of,
acquiring a temperature value of the second temperature sensor in real time when the carbon loading of the diesel engine is greater than the carbon loading threshold and in the fourth combustion mode;
and when the temperature value of the second temperature sensor is larger than a preset fourth temperature threshold value, controlling the diesel engine to enter a fifth combustion mode for forced cooling of the DPF, and switching to the fourth combustion mode after the temperature value of the second temperature sensor is smaller than the preset fourth temperature threshold value.
Optionally, the control mode selection module is configured to determine the target control parameter according to a control chart of the gas path executor and the control parameter corresponding to each preset combustion mode, where the control chart is obtained according to a calibration result.
Optionally, the system further comprises: a calibration device;
the calibration device comprises a rack data acquisition unit, a first calibration unit, a second calibration unit and a calibration verification unit;
the rack data acquisition unit is used for acquiring at least one type of rack data of the diesel engine, the air path executor and the temperature sensor;
the first calibration unit is used for calibrating the open-loop opening degree of the gas circuit actuator in each combustion mode according to the rack data;
the second calibration unit is used for determining a calibration result of the air circuit actuator according to the open-loop opening degree;
the calibration verification unit is used for verifying the calibration result.
Optionally, the air path executor control module is configured to execute:
determining basic opening of each component of the air path executor;
determining the maximum and minimum limit and the change rate of the opening of each component of the air circuit actuator;
And determining target opening degrees of all the components of the gas circuit actuator according to the maximum and minimum limit, the change rate and the target control parameter, and controlling all the components of the gas circuit actuator according to the target opening degrees.
According to another aspect of the present invention, there is provided a thermal management control method based on the diesel engine thermal management system according to any one of the above embodiments, including:
each temperature sensor detects an operating temperature of at least one location of the aftertreatment device;
the thermal management control device determines a target combustion mode of the diesel engine according to the working temperature, adjusts the current combustion mode of the diesel engine according to the target combustion mode and controls the air path executor.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the thermal management control method of any one of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute a thermal management control method according to any one of the embodiments of the present invention.
In the technical scheme of the embodiment of the invention, each temperature sensor is used for detecting the working temperature of at least one position of the post-processing device; the thermal management control device is used for determining a target combustion mode of the diesel engine according to the working temperature, adjusting the current combustion mode of the diesel engine according to the target combustion mode and controlling the air path executor. According to the scheme provided by the embodiment of the invention, different combustion modes are distinguished through the temperature of the post-processing device, the diesel engine is controlled to enter the target combustion mode, the air path executor is enabled to execute corresponding control operation so as to meet the temperature discharge requirements under different combustion modes, hidden dangers are avoided through a reasonable thermal management mode, and the thermal management capability of the diesel engine is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a thermal management system for a diesel engine according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a thermal management system for a diesel engine according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a thermal management control device according to a first embodiment of the present invention;
FIG. 4 is a flow chart of a combustion mode selection method according to a second embodiment of the present invention
FIG. 5 is a schematic diagram illustrating the operation of a combustion mode selection module according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of a thermal management system for a diesel engine according to a second embodiment of the present invention;
FIG. 7 is a schematic representation of individual thermal management of each pneumatic actuator for use in accordance with the second embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a thermal management scope of a pneumatic actuator according to a second embodiment of the present invention;
FIG. 9 is a flow chart of a thermal management control method according to a third embodiment of the present invention;
fig. 10 is a schematic structural diagram of an electronic device implementing a thermal management control method according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention 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 such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise 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.
Example 1
Fig. 1 is a schematic diagram of a thermal management system for a diesel engine according to a first embodiment of the present invention, where the present embodiment is applicable to a case of thermal management of a diesel engine. As shown in fig. 1, the system includes: a diesel engine 110, a gas circuit actuator 120, an aftertreatment device 130, at least one temperature sensor 140, and a thermal management control device 150; each of the temperature sensors 140 is configured to detect an operating temperature of at least one location of the aftertreatment device 130; the thermal management control device 150 is configured to determine a target combustion mode of the diesel engine 110 according to the operating temperature, and adjust a current combustion mode of the diesel engine 110 and control the air path executor 120 according to the target combustion mode.
Fig. 2 is a schematic diagram of a thermal management system for a diesel engine according to a first embodiment of the present invention, as shown in fig. 2, the air path executor includes: a turbocharger 1, a cooler 2, a turbocharger electronic throttle valve THR3, a supercharger bleed valve EAWG4 and an electronically controlled exhaust throttle valve ETV5;
the engine aftertreatment device 6 comprises DOC, DFP, SCR and ASC which are sequentially connected, and the DOC is connected with an electric control exhaust throttle valve ETV5;
The temperature sensor comprises a first temperature sensor 7 arranged at the front end of the DOC, a second temperature sensor 8 arranged between the rear end of the DOC and the front end of the DPF, a third temperature sensor 9 arranged between the rear end of the DPF and the front end of the SCR, and a fourth temperature sensor 10 arranged between the rear end of the SCR and the ASC; the first temperature sensor 7 is used for detecting the DOC front temperature, the second temperature sensor 8 is used for detecting the DPF front temperature, the third temperature sensor 9 is used for detecting the SCR front temperature, and the fourth temperature sensor 10 is used for detecting the ASC front temperature.
Wherein an electronic throttle valve THR for thermal management of a diesel engine is mounted on an intake manifold of the diesel engine. The control mode EAWG of the supercharger air release valve adopted by the invention is different from a traditional mechanical supercharging pressure driven air release valve and is also different from an EWG which directly drives the air release valve through a motor, but the pressure value change of a given supercharger valve rod air source of an external air source is controlled through an electric control valve device, so that the change of the opening of the supercharger air release valve is controlled. The electronically controlled exhaust throttle valve ETV is mounted on the diesel engine exhaust pipe at the supercharger turbine outlet.
The temperature sensors for triggering different combustion modes of the diesel engine are respectively DOC front temperature sensors T4 arranged between an inlet of the post-processor and the front end of the DOC, DPF front temperature sensors arranged between the rear end of the DOC and the front end of the DPF, hereinafter referred to as T5, SCR front temperature sensors arranged between the rear end of the DPF and the front end of the SCR, hereinafter referred to as T6, and ASC front temperature sensors arranged between the rear end of the SCR and the front end of the ASC, hereinafter referred to as T7.
As shown in fig. 2, the arrow direction indicates the airflow passing direction. Air is boosted by the turbocharger 1 and then enters the intercooler 2 to be cooled by cold air, then enters the engine cylinder to participate in combustion through THR3 on an intake manifold, part of combusted waste gas pushes a turbine of the turbocharger and then enters an exhaust pipe, the other part of waste gas is directly discharged to the exhaust pipe before the turbine through an exhaust gas bleed valve of the EAWG4 without passing through the turbine, and the two waste gases flow through the post processor 6 after the exhaust pipes are converged and then pass through the ETV5 and finally are discharged to the atmosphere. The architecture of the post-processor includes, but is not limited to DOC, DFP, SCR and ASC. The temperature sensors on the post processor are respectively a T4 temperature sensor 7 arranged between the inlet of the post processor and the front end of the DOC, a T5 temperature sensor 8 arranged between the rear end of the DOC and the front end of the DPF, a T6 temperature sensor 9 arranged between the rear end of the DPF and the front end of the SCR, and a T7 temperature sensor 10 arranged between the rear end of the SCR and the front end of the ASC.
Fig. 3 is a schematic diagram of a thermal management control device according to a first embodiment of the present invention, as shown in fig. 4, where the thermal management control device includes: the device comprises a combustion mode selection module 11, a control mode selection module 12, a gas circuit executor control module 13, a main injection parameter control module 14 and a post injection parameter control module 15;
the combustion mode selection module 11 is configured to determine the target combustion mode according to a detection result of the temperature sensor;
the control mode selection module 12 is configured to determine a target control parameter of the gas path executor according to the target combustion mode;
the air path executor control module 13 is configured to control the air path executor according to the target control parameter;
the main injection parameter control module 14 is configured to control main injection parameters of the diesel engine according to the target combustion mode;
the post-injection parameter control module 15 is configured to control post-injection parameters of the diesel engine according to the target combustion mode.
The thermal management control device comprises five parts, namely a combustion mode selection module, a control mode selection module, a gas circuit executor control module, a main spray parameter control module and a post-spray parameter control module. The combustion mode selection module is used for triggering different combustion modes; the control mode selection module is used for selecting the gas circuit executor and the target control parameters of combustion in different combustion modes; the air circuit executor control module controls the opening of the air circuit executor on the basis of the target control parameters; the main spray parameter control module controls main spray parameters (main spray timing and rail pressure control); and the post-spraying parameter control module controls the post-spraying parameters.
Example two
Fig. 4 is a flowchart of a combustion mode selection method according to a second embodiment of the present invention, where the method is performed by a combustion mode selection module, and as shown in fig. 4, the method includes:
s410, determining whether the carbon loading of the diesel engine is larger than a preset carbon loading threshold.
S420, when the carbon load threshold is not greater than the carbon load threshold, determining whether the temperature of the third temperature sensor is greater than a preset first temperature threshold, and if so, controlling the diesel engine to enter a first combustion mode representing a standard combustion mode of the diesel engine; and if the temperature of the fuel is not greater than the first temperature threshold, controlling the diesel engine to enter a second combustion mode used for SCR heating.
S430, when the carbon loading threshold is larger than the carbon loading threshold, determining whether the temperature of the first temperature sensor is larger than a preset second temperature threshold, and if so, controlling the diesel engine to enter a third combustion mode used for DOC heating; and if the temperature is not greater than the second temperature threshold value, controlling the diesel engine to enter a fourth combustion mode for DPF regeneration.
Wherein the combustion mode comprises mode0, namely the combustion mode with the best power and economy of the diesel engine when the diesel engine has no heat management requirement; the far post injection or HC injection function for improving the temperature of T5 is forbidden to be used because the temperature of T4 is too low and the temperature of T4 is only improved by the thermal management of the air path executor and the near post injection; mode2 for DPF regeneration, wherein the temperature of T4 is high enough, and a far post-injection or HC injection function is started on the basis of the thermal management control of mode1 to realize the target temperature of T5 of the regenerated DPF; mode3 for forced cooling of DPF due to excessive temperature inside DPF during DPF regeneration; mode4 for heating the SCR system.
In an embodiment of the present invention, the combustion mode selection module is further configured to perform: acquiring a temperature value of the third temperature sensor in real time when the carbon loading of the diesel engine is not greater than the carbon loading threshold and the diesel engine is in the second combustion mode; when the temperature value of the third temperature sensor is larger than a preset third temperature threshold value, controlling the diesel engine to enter the first combustion mode, wherein the third temperature threshold value is larger than the first temperature threshold value; acquiring a temperature value of the second temperature sensor in real time when the carbon loading of the diesel engine is greater than the carbon loading threshold and in the fourth combustion mode; and when the temperature value of the second temperature sensor is larger than a preset fourth temperature threshold value, controlling the diesel engine to enter a fifth combustion mode for forced cooling of the DPF, and switching to the fourth combustion mode after the temperature value of the second temperature sensor is smaller than the preset fourth temperature threshold value.
Fig. 5 is a schematic diagram of the working principle of the combustion mode selection module according to the second embodiment of the present invention, as shown in fig. 5: step 16, judging whether the calculated carbon load of the engine is greater than a threshold value, if so, continuing to judge whether the temperature T4 is greater than a temperature threshold value A through step 17, if not, entering a mode1 for DOC heating until the temperature T4 is greater than the threshold value A; if the temperature T4 is greater than the threshold a, the DPF regeneration is performed in mode2, and during the regeneration, there is a determination in process 19, that is, whether the temperature T5 is greater than the temperature threshold B, if so, the cooling mode3 is forced to be entered, and when the temperature T5 is again lower than the threshold B, the mode3 is exited, and the mode2 is entered again. If, in the determination of process 16, the engine calculated carbon load is less than the threshold, then process 22 is entered to determine if T6 temperature is greater than temperature threshold C, if greater than threshold C, then the engine is operating in conventional mode0, if less than temperature threshold C, then the engine enters SCR heating mode4, after entering mode4, the engine is entered to process 24 to determine if T6 temperature is greater than temperature threshold D, if greater than threshold D, then mode0 is entered, if less than threshold D is continued to remain at mode4, temperature threshold D is greater than temperature threshold C by about 10 degrees according to calibrated experience, for preventing frequent variation between mode0 and mode 4. The priorities of modes 1, 2 and 3 for active regeneration of the DPF are higher than mode4 for SCR heating, and the priorities of modes 1, 2, 3 and 4 are all higher than the conventional combustion mode0.
In the embodiment of the invention, the control mode selection module is configured to determine the target control parameter according to a control chart of the gas circuit actuator and the control parameter corresponding to each preset combustion mode, where the control chart is obtained according to a calibration result.
The control mode selection module is mainly a three-dimensional chart and is used for selecting the gas path executor and the control chart of the combustion parameters in different combustion modes. The 5 values of the Y axis of the graph represent combustion modes mode0, 1, 2, 3 and 4 respectively, the X axis represents a control graph of an air path actuator and combustion parameters, and a throttle open-loop opening control graph, a throttle maximum and minimum limiting graph, a throttle coordination control graph, a supercharger open-loop opening control graph, a supercharger maximum and minimum limiting graph, a supercharger coordination control graph, a throttle open-loop opening control graph, a throttle maximum and minimum limiting graph, a throttle coordination control graph, a main injection timing graph, a rail pressure graph, a post injection efficiency graph, a post injection timing graph and a post injection timing graph are sequentially arranged from left to right. The value on the Z axis represents the code of the selection map, for example, the throttle opening is divided into 5 maps in total for different combustion modes, the Z value on the Y axis corresponds to mode2 and the Z value on the X axis corresponds to the throttle opening control map is 3, and the basic value representing the throttle opening in mode2 is determined from the calibration result of the throttle opening control map 3.
Fig. 6 is a schematic diagram of a thermal management system for a diesel engine according to a second embodiment of the present invention; as shown in fig. 6, the diesel engine thermal management system further includes: a calibration device;
the calibration device comprises a rack data acquisition unit 610, a first calibration unit 620, a second calibration unit 630 and a calibration verification unit 640;
the rack data acquisition unit 610 is configured to acquire at least one kind of rack data of the diesel engine, the gas circuit actuator, and the temperature sensor;
the first calibration unit 620 is configured to calibrate an open-loop opening of the gas circuit actuator in each combustion mode according to the rack data;
the second calibration unit 630 is configured to determine a calibration result of the gas circuit actuator according to the open-loop opening degree;
the calibration verification unit 640 is configured to verify the calibration result.
The calibration in the embodiment of the invention mainly comprises four steps: the method comprises the steps of rack data acquisition, gas circuit executor rough calibration, gas circuit executor calibration optimization and calibration result verification.
And (3) collecting rack data: engine parameters such as engine speed, torque, specific fuel consumption, post-vortex temperature, T4-T7 temperature, pre-vortex pressure, intake negative pressure and 483 smoke degree in THR, EAWG and ETV of a diesel engine used singly or in combination under specific working conditions of high, medium and low loads are focused.
Rough mark of air path executor: for the data acquired by the rack data, only the independent heat management temperature discharge and oil consumption results of each air path executor are listed for analysis, and the heat management action range of each air path executor is roughly marked. Fig. 7 is a schematic diagram showing the performance of individual thermal management of each air path actuator according to the second embodiment of the present invention, wherein in the low load engine shown in fig. 7, the change of the opening degree of the EAWG has almost no effect on the rise of the exhaust temperature due to the low efficiency of the supercharger. The exhaust temperature of the engine can be increased by reducing the opening of THR, but the exhaust temperature is limited by intake negative pressure, and the increasing space of the exhaust temperature is very limited. The exhaust temperature can be obviously improved by reducing the ETV opening, but the increase of the oil consumption is more obvious relative to THR, and the pressure is continuously increased before vortex along with the reduction of the ETV opening, so that the hidden troubles of air leakage of a supercharger, burning of a fuel nozzle of a fuel injector and the like exist. Therefore, when the engine is under low load, the mode4 adopts the THR and ETV combined heat management mode, so that the hidden danger can be avoided, and the exhaust temperature and the engine economy can be both considered. For mode1 and mode2, the day temperature of the steady-state working condition is generally required to be above 450 ℃, and the low-load thermal management cannot meet the requirement, but the near post-injection is added for thermal management besides the combined gas circuit thermal management of THR and ETV due to the consideration of the exhaust temperature as high as possible.
In medium engine load, the individual EAWG thermal management has a certain temperature raising and discharging capacity, but the potential is still lower than THR and ETV, however, considering the load rising of the engine, the fuel consumption of the thermal management is increasingly important gradually approaching the common working condition range, so in medium engine load, mode4 adopts the combined thermal management of THR and EAWG which saves more fuel, and mode1 and mode2 increase the post injection thermal management on the basis of the combined thermal management of THR and EAWG.
In the middle and high load of the engine, the efficiency of the supercharger is high, combustion can be remarkably deteriorated by controlling the opening degree of the relief valve of the EAWG, the temperature raising and discharging effect of heat management by the EAWG alone is enough, and the oil consumption performance is best, so that the high load modes 1, 2 and 4 in the engine only need to be subjected to heat management by the EAWG alone.
Fig. 8 is a schematic diagram of the thermal management scope of the air circuit actuator of modes 1, 2 and 4 applied to the second embodiment of the present invention. As shown in fig. 8, when the temperature T5 exceeds a certain threshold value during the regeneration process of the DPF, the DPF cooling mode3 is triggered, and in order to reduce the internal temperature of the DPF as soon as possible, the amount of air intake flowing through the post-processor needs to be instantaneously increased, so that the heat is quickly taken away. According to this idea, in mode3, THR and ETV are fully open and EAWG controlled booster bleed valve is fully closed.
And (3) calibrating and optimizing the air path executor: on the basis that the rough standard of the air path executors preliminarily determines the open-loop opening MAP of each air path executor, the opening degree of the transition working condition of each air path executor in the thermal management switching use is smoothed, the opening degree change speed of each air path executor is adjusted, the final calibration result of each air path executor is finally determined, and the fact that sudden fluctuation of the air input of the engine caused by the opening degree change of the air path executor in the thermal management process of the diesel engine is avoided, so that torque fluctuation is generated to influence driving experience greatly is avoided.
And (3) verifying a calibration result: after the final calibration result of each air path executor is finally determined, the calibration result is checked through the universal characteristics of different modes and the temperature performance in WHTC. In mode4, the average T6 temperature of WHTC should be no less than 265 ℃ in the event that the characteristic T6 temperature should be as high as 300 ℃. In mode1 and mode2, the T4 temperature should be as high as 450 ℃ as possible under other conditions than low load, and the lowest T4 temperature of WHTC should be higher than 280 ℃.
In an embodiment of the present invention, the air path executor control module is configured to execute: determining basic opening of each component of the air path executor; determining the maximum and minimum limit and the change rate of the opening of each component of the air circuit actuator; and determining target opening degrees of all the components of the gas circuit actuator according to the maximum and minimum limit, the change rate and the target control parameter, and controlling all the components of the gas circuit actuator according to the target opening degrees.
The gas circuit executor control module controls the opening of the gas circuit executor on the basis of each control chart of the given gas circuit of the module, and the gas circuit executor control module firstly judges the combustion mode of the engine. If the gas circuit executor opening degree chart is divided into two cases in mode4, for the basic opening degree of the ETV, a plurality of ETV basic opening degree charts can be switched along with the change of the temperature T6, so that the ETV opening degree is controlled more finely, and the opening degrees of THR and EAWG uniquely determine one chart as the basic opening degree chart. The output basic opening value of the gas circuit actuator carries out maximum and minimum value limitation of the opening, when the limited opening value of the gas circuit actuator changes, the opening speed is regulated, the gas circuit actuator is forced to be fully opened when the smoke limit is triggered in the extreme case, and the opening of the gas circuit actuator after the maximum and minimum value limitation and the change rate regulation is determined as the final opening of each part of the gas circuit actuator.
In addition, the main injection parameter control module comprises a main injection timing and rail pressure control chart, in the mode0, the main injection timing and the rail pressure are calibrated by taking fuel consumption reduction as a guide, and in the modes 1, 2 and 4, the main injection timing is properly delayed and the rail pressure is reduced to achieve the purpose of deteriorating combustion and further improving the exhaust temperature, however, the main injection timing is delayed in the heat management process, the influence of the rail pressure on smoke intensity is greatly reduced, and the effect of improving the exhaust temperature is very limited in the test process, so that the main injection timing and the rail pressure still keep using the timing and the rail pressure of the mode0 in the heat management process of different modes at present.
The post-injection parameter control module comprises a near post-injection efficiency and timing chart and a far post-injection timing chart. Because the injection timing of the near post injection is closer to the main injection, and part of fuel participates in combustion, the near post injection efficiency chart is used for reflecting the effect of the near post injection on combustion, and mainly the contribution degree of the near post injection on the output torque of the engine. The influence of the post-injection timing on the smoke temperature and the exhaust temperature of the engine is relatively large, the smoke temperature and the exhaust temperature are required to be considered at different working conditions by finding reasonable angles, and if the thermal management temperature of the mode4 through the air path actuator is enough, the post-injection thermal management is not recommended. In mode1 and mode2, due to the low load base exhaust temperature, the light-off temperature of the DOC may still not be satisfied under the condition of the combined thermal management of the gas path actuator, and the amount of the post-injection oil is properly increased, but the maximum post-injection oil is not recommended to exceed half of the main injection oil. The far post-spray is used only in mode2 to raise the T5 temperature, which is not essential to the invention and is not described in detail here.
Example III
Fig. 9 is a flowchart of a thermal management control method according to a third embodiment of the present invention. As shown in fig. 9, the method includes:
s910, each temperature sensor detects the working temperature of at least one position of the post-processing device.
S920, the thermal management control device determines a target combustion mode of the diesel engine according to the working temperature, adjusts the current combustion mode of the diesel engine according to the target combustion mode and controls the air path executor.
Optionally, the air path executor includes: a turbocharger, a cooler, a turbocharger electronic throttle valve THR, a turbocharger bleed valve EAWG and an electronically controlled exhaust throttle valve ETV;
the engine aftertreatment device comprises DOC, DFP, SCR and ASC which are sequentially connected, and the DOC is connected with an electronic control exhaust throttle valve ETV;
the temperature sensor comprises a first temperature sensor arranged at the front end of the DOC, a second temperature sensor arranged between the rear end of the DOC and the front end of the DPF, a third temperature sensor arranged between the rear end of the DPF and the front end of the SCR, and a fourth temperature sensor arranged between the rear end of the SCR and the ASC; the first temperature sensor is used for detecting the DOC front temperature, the second temperature sensor is used for detecting the DPF front temperature, the third temperature sensor is used for detecting the SCR front temperature, and the fourth temperature sensor is used for detecting the ASC front temperature.
Optionally, the thermal management control device includes: the device comprises a combustion mode selection module, a control mode selection module, a gas circuit executor control module, a main spray parameter control module and a post-spray parameter control module;
correspondingly, the method further comprises the steps of:
the combustion mode selection module determines the target combustion mode according to the detection result of the temperature sensor;
the control mode selection module determines target control parameters of the air circuit actuator according to the target combustion mode;
the gas circuit executor control module controls the gas circuit executor according to the target control parameter;
the main injection parameter control module controls main injection parameters of the diesel engine according to the target combustion mode;
the post-injection parameter control module controls post-injection parameters of the diesel engine according to the target combustion mode.
Optionally, the combustion mode selection module determines whether a carbon loading of the diesel engine is greater than a preset carbon loading threshold; determining whether the temperature of the third temperature sensor is greater than a preset first temperature threshold when the carbon load threshold is not greater than, and if so, controlling the diesel engine to enter a first combustion mode representing a standard combustion mode of the diesel engine; if the temperature of the fuel is not greater than the first temperature threshold, controlling the diesel engine to enter a second combustion mode used for SCR heating; determining if the temperature of the first temperature sensor is greater than a preset second temperature threshold when greater than the carbon loading threshold, and if so, controlling the diesel engine to enter a third combustion mode characterized for DOC heating; and if the temperature is not greater than the second temperature threshold value, controlling the diesel engine to enter a fourth combustion mode for DPF regeneration.
Optionally, the method further comprises: the combustion mode selection module obtains a temperature value of the third temperature sensor in real time when a carbon loading of the diesel engine is not greater than the carbon loading threshold and the diesel engine is in the second combustion mode; when the temperature value of the third temperature sensor is larger than a preset third temperature threshold value, controlling the diesel engine to enter the first combustion mode, wherein the third temperature threshold value is larger than the first temperature threshold value;
optionally, the method further comprises: acquiring a temperature value of the second temperature sensor in real time when the carbon loading of the diesel engine is greater than the carbon loading threshold and in the fourth combustion mode;
and when the temperature value of the second temperature sensor is larger than a preset fourth temperature threshold value, controlling the diesel engine to enter a fifth combustion mode for forced cooling of the DPF, and switching to the fourth combustion mode after the temperature value of the second temperature sensor is smaller than the preset fourth temperature threshold value.
Optionally, the control mode selection module determines the target control parameter according to a preset control chart of the air path executor and the control parameter corresponding to each combustion mode, wherein the control chart is obtained according to a calibration result.
Optionally, the diesel engine thermal management system further comprises a calibration device;
the calibration device comprises a rack data acquisition unit, a first calibration unit, a second calibration unit and a calibration verification unit;
correspondingly, the method further comprises the steps of:
the rack data acquisition unit acquires at least one type of rack data of the diesel engine, the gas circuit actuator and the temperature sensor;
the first calibration unit calibrates open-loop opening degrees of the gas circuit executor in each combustion mode according to the rack data;
the second calibration unit determines a calibration result of the air circuit actuator according to the open-loop opening degree;
and the calibration verification unit verifies the calibration result.
Optionally, the gas circuit executor control module determines a basic opening degree of each component part of the gas circuit executor; determining the maximum and minimum limit and the change rate of the opening of each component of the air circuit actuator; and determining target opening degrees of all the components of the gas circuit actuator according to the maximum and minimum limit, the change rate and the target control parameter, and controlling all the components of the gas circuit actuator according to the target opening degrees.
Example IV
Fig. 10 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 10, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM12 and the RAM13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as thermal management control methods.
In some embodiments, the thermal management control method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM12 and/or the communication unit 19. When the computer program is loaded into RAM13 and executed by processor 11, one or more steps of the thermal management control method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the thermal management control method in any other suitable manner (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (11)
1. A diesel engine thermal management system, comprising: the device comprises a diesel engine, a gas circuit executor, a post-processing device, at least one temperature sensor and a thermal management control device;
each of the temperature sensors is used for detecting the working temperature of at least one position of the aftertreatment device;
the thermal management control device is used for determining a target combustion mode of the diesel engine according to the working temperature, adjusting the current combustion mode of the diesel engine according to the target combustion mode and controlling the air path executor.
2. The system of claim 1, wherein the gas circuit actuator comprises: a turbocharger, a cooler, a turbocharger electronic throttle valve THR, a turbocharger bleed valve EAWG and an electronically controlled exhaust throttle valve ETV;
the engine aftertreatment device comprises DOC, DFP, SCR and ASC which are sequentially connected, and the DOC is connected with an electronic control exhaust throttle valve ETV;
the temperature sensor comprises a first temperature sensor arranged at the front end of the DOC, a second temperature sensor arranged between the rear end of the DOC and the front end of the DPF, a third temperature sensor arranged between the rear end of the DPF and the front end of the SCR, and a fourth temperature sensor arranged between the rear end of the SCR and the ASC; the first temperature sensor is used for detecting the DOC front temperature, the second temperature sensor is used for detecting the DPF front temperature, the third temperature sensor is used for detecting the SCR front temperature, and the fourth temperature sensor is used for detecting the ASC front temperature.
3. The system of claim 1, wherein the thermal management control device comprises: the device comprises a combustion mode selection module, a control mode selection module, a gas circuit executor control module, a main spray parameter control module and a post-spray parameter control module;
The combustion mode selection module is used for determining the target combustion mode according to the detection result of the temperature sensor;
the control mode selection module is used for determining target control parameters of the air path executor according to the target combustion mode;
the air channel actuator control module is used for controlling the air channel actuator according to the target control parameter;
the main injection parameter control module is used for controlling main injection parameters of the diesel engine according to the target combustion mode;
the post-injection parameter control module is used for controlling the post-injection parameters of the diesel engine according to the target combustion mode.
4. A system according to claim 3, wherein the combustion mode selection module is configured to perform:
determining whether a carbon charge of the diesel engine is greater than a preset carbon charge threshold;
determining whether the temperature of the third temperature sensor is greater than a preset first temperature threshold when the carbon load threshold is not greater than, and if so, controlling the diesel engine to enter a first combustion mode representing a standard combustion mode of the diesel engine; if the temperature of the fuel is not greater than the first temperature threshold, controlling the diesel engine to enter a second combustion mode used for SCR heating;
Determining if the temperature of the first temperature sensor is greater than a preset second temperature threshold when greater than the carbon loading threshold, and if so, controlling the diesel engine to enter a third combustion mode characterized for DOC heating; and if the temperature is not greater than the second temperature threshold value, controlling the diesel engine to enter a fourth combustion mode for DPF regeneration.
5. The system of claim 4, wherein the combustion mode selection module is further configured to perform:
acquiring a temperature value of the third temperature sensor in real time when the carbon loading of the diesel engine is not greater than the carbon loading threshold and the diesel engine is in the second combustion mode;
when the temperature value of the third temperature sensor is larger than a preset third temperature threshold value, controlling the diesel engine to enter the first combustion mode, wherein the third temperature threshold value is larger than the first temperature threshold value;
the method comprises the steps of,
acquiring a temperature value of the second temperature sensor in real time when the carbon loading of the diesel engine is greater than the carbon loading threshold and in the fourth combustion mode;
and when the temperature value of the second temperature sensor is larger than a preset fourth temperature threshold value, controlling the diesel engine to enter a fifth combustion mode for forced cooling of the DPF, and switching to the fourth combustion mode after the temperature value of the second temperature sensor is smaller than the preset fourth temperature threshold value.
6. The system of claim 3, wherein the control mode selection module is configured to determine the target control parameter according to a control chart of the gas path actuator and the control parameter corresponding to each preset combustion mode, where the control chart is obtained according to a calibration result.
7. The system of claim 6, further comprising a calibration device;
the calibration device comprises a rack data acquisition unit, a first calibration unit, a second calibration unit and a calibration verification unit;
the rack data acquisition unit is used for acquiring at least one type of rack data of the diesel engine, the air path executor and the temperature sensor;
the first calibration unit is used for calibrating the open-loop opening degree of the gas circuit actuator in each combustion mode according to the rack data;
the second calibration unit is used for determining a calibration result of the air circuit actuator according to the open-loop opening degree;
the calibration verification unit is used for verifying the calibration result.
8. A system according to claim 3, wherein the pneumatic actuator control module is configured to perform:
Determining basic opening of each component of the air path executor;
determining the maximum and minimum limit and the change rate of the opening of each component of the air circuit actuator;
and determining target opening degrees of all the components of the gas circuit actuator according to the maximum and minimum limit, the change rate and the target control parameter, and controlling all the components of the gas circuit actuator according to the target opening degrees.
9. A thermal management control method based on a diesel engine thermal management system according to any one of claims 1 to 8, characterized by comprising:
each temperature sensor detects an operating temperature of at least one location of the aftertreatment device;
the thermal management control device determines a target combustion mode of the diesel engine according to the working temperature, adjusts the current combustion mode of the diesel engine according to the target combustion mode and controls the air path executor.
10. An electronic device, the electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the thermal management control method of claim 9.
11. A computer readable storage medium storing computer instructions for causing a processor to execute the thermal management control method of claim 9.
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| CN202310150362.8A CN116291927A (en) | 2023-02-22 | 2023-02-22 | Diesel engine heat management system and heat management control method |
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| CN202310150362.8A CN116291927A (en) | 2023-02-22 | 2023-02-22 | Diesel engine heat management system and heat management control method |
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| CN202310150362.8A Pending CN116291927A (en) | 2023-02-22 | 2023-02-22 | Diesel engine heat management system and heat management control method |
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| Country | Link |
|---|---|
| CN (1) | CN116291927A (en) |
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2023
- 2023-02-22 CN CN202310150362.8A patent/CN116291927A/en active Pending
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