CN110821690B - Method, device and equipment for acquiring idle speed target value of diesel engine and storage medium - Google Patents
Method, device and equipment for acquiring idle speed target value of diesel engine and storage medium Download PDFInfo
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- CN110821690B CN110821690B CN201911217332.4A CN201911217332A CN110821690B CN 110821690 B CN110821690 B CN 110821690B CN 201911217332 A CN201911217332 A CN 201911217332A CN 110821690 B CN110821690 B CN 110821690B
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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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/08—Introducing corrections for particular operating conditions for idling
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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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/023—Temperature of lubricating oil or working fluid
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
Abstract
The invention belongs to the technical field of idle speed value determination, and discloses a method, a device, equipment and a storage medium for acquiring an idle speed target value of a diesel engine. The method comprises the following steps: the method comprises the steps of obtaining an idle speed value of a diesel engine in a first dimension, obtaining the current state of a particle catcher, detecting whether the current state of the particle catcher is a preset state or not, obtaining an idle speed value of the diesel engine in a second dimension if the current state of the particle catcher is the preset state, comparing the idle speed value of the diesel engine in the first dimension with the idle speed value of the diesel engine in the second dimension, determining a target idle speed value of the diesel engine according to a comparison result, and ensuring the safe regeneration of the particle quality of the particle catcher through the method, so that the fuel consumption of a vehicle is reduced, and the driving experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of idle speed value determination, in particular to a method, a device, equipment and a storage medium for acquiring an idle speed target value of a diesel engine.
Background
At present, the idle speed control strategy of the diesel engine is to select the maximum allowable carbon loading in a safe temperature range in order to ensure the safe regeneration of the detection particle catcher, so that the idle speed reduction and over-temperature problem of the detection particle catcher can be avoided no matter whether the regeneration is carried out under the idle speed reduction working condition or not. However, in the prior art, the regeneration safety of the detection particle catcher is ensured by reducing the mass of the particles, and the idle speed control has no relation with whether the detection particle catcher is regenerated or not, so that the carbon carrying capacity of the detection particle catcher is not complete, the volume of the whole detection particle catcher is large, the carbon carrying capacity is small, the regeneration mileage is short for the whole vehicle, and the oil consumption is high and even the engine oil is diluted.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for acquiring an idle speed target value of a diesel engine, and aims to solve the technical problem of reducing the oil consumption of a vehicle by ensuring the safe regeneration of the particle quality of a particle catcher.
In order to achieve the above object, the present invention provides a method for obtaining an idle speed target value of a diesel engine, the method comprising the steps of:
acquiring an idle speed value of the diesel engine in a first dimension, and acquiring the current state of the particle catcher;
detecting whether the current state of the particle catcher is a preset state or not;
if the current state is the preset state, acquiring an idle speed value of the diesel engine in a second dimension;
comparing the idle value in the first dimension to the idle value in the second dimension;
and determining a target idle speed value of the diesel engine according to the comparison result.
Preferably, the first dimension includes coolant temperature, vehicle gear, on-board diagnostics OBD malfunction, and regeneration status of the particle trap;
the step of obtaining the idle speed value of the diesel engine in the first dimension comprises the following steps:
and acquiring a first idle speed value under different coolant temperatures, a second idle speed value under different vehicle gears, a third idle speed value under different vehicle-mounted diagnosis faults and a fourth idle speed value under the regeneration state of the particle catcher.
Preferably, the preset state is a regeneration state, and the second dimension comprises a particle mass of the particle trap;
if the current state is the preset state, the step of obtaining the idle speed value of the diesel engine in the second dimension comprises the following steps:
if the current state of the particle trap is the regeneration state, a fifth idle value of the particle mass of the particle trap is obtained.
Preferably, the step of obtaining a fifth idle value for the particle mass of the particle trap comprises:
acquiring the particle mass of the particle catcher;
calculating an idling processing value corresponding to the particle mass of the particle catcher by an idling reduction method according to the particle mass of the particle catcher;
judging whether the test temperature corresponding to the idle speed processing value meets a preset safe temperature standard or not;
and if the test temperature corresponding to the idle speed processing value meets the preset safe temperature standard, taking the idle speed processing value as a fifth idle speed value of the particle mass of the particle catcher.
Preferably, after the step of determining whether the test temperature corresponding to the idle speed processing value meets the preset safe temperature standard, the method further includes:
and if the test temperature corresponding to the idle speed processing value does not meet the preset safe temperature standard, returning to the step of obtaining the particle quality of the particle catcher.
Preferably, the step of comparing the idle value in the first dimension with the idle value in the second dimension includes:
and comparing the idle values of the first idle value, the second idle value, the third idle value, the fourth idle value and the fifth idle value to obtain a comparison result.
In addition, to achieve the above object, the present invention also provides an apparatus for obtaining an idle target value of a diesel engine, the apparatus including: the acquisition module is used for acquiring an idle speed value of the diesel engine in a first dimension and acquiring the current state of the particle catcher;
the detection module is used for detecting whether the current state of the particle catcher is a preset state or not;
the result module is used for acquiring an idle speed value of the diesel engine in a second dimension if the current state is the preset state;
the comparison module is used for comparing the idle value in the first dimension with the idle value in the second dimension;
and the determining module is used for determining the target idle speed value of the diesel engine according to the comparison result.
In addition, to achieve the above object, the present invention also provides an electronic device, including: a memory, a processor and a get diesel idle target value program stored on the memory and operable on the processor, the get diesel idle target value program configured to implement the steps of the get diesel idle target value method as described above.
Furthermore, in order to achieve the above object, the present invention further provides a storage medium having stored thereon a program for acquiring a diesel idle target value, which when executed by a processor implements the steps of the method for acquiring a diesel idle target value as described above.
According to the method, the carbon carrying capacity of the particle trap is fully utilized, the safe regeneration of the particle trap is ensured, the regeneration mileage interval is improved, and the engine oil dilution risk is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a method of obtaining an idle target value for a diesel engine according to the present invention;
FIG. 3 is a schematic flow chart of a second embodiment of a method of obtaining an idle target value for a diesel engine according to the present invention;
fig. 4 is a block diagram showing the construction of a first embodiment of the device for obtaining an idle target value of a diesel engine according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the electronic device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the electronic device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a program for acquiring a target value of an idle speed of a diesel engine.
In the electronic apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the electronic device of the present invention may be provided in the electronic device, and the electronic device may call the program for acquiring the idle target value of the diesel engine stored in the memory 1005 through the processor 1001 and execute the method for acquiring the idle target value of the diesel engine provided by the embodiment of the present invention.
An embodiment of the present invention provides a method for obtaining an idle target value of a diesel engine, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the method for obtaining an idle target value of a diesel engine according to the present invention.
In this embodiment, the method for obtaining the idle speed target value of the diesel engine includes the following steps:
step S10: and acquiring an idle speed value of the diesel engine in a first dimension, and acquiring the current state of the particle catcher.
The first dimension includes coolant temperature, vehicle gear, on-board diagnostics OBD malfunction, and regeneration status of the particle trap.
It is to be understood that a first idle value at different coolant temperatures, a second idle value at different vehicle gears, a third idle value at different on-board diagnostics OBD faults and a fourth idle value at regeneration status of the particle trap are obtained.
Step S20: detecting whether the current state of the particle catcher is a preset state.
It is noted that it is detected whether the current state of the particle catcher is the regeneration state.
Step S30: and if the current state is the preset state, acquiring an idle speed value of the diesel engine in a second dimension.
It is to be understood that said second dimension comprises the particle mass of the particle trap, and that a fifth idle value of the particle mass of the particle trap is obtained if said particle trap is in said regeneration state.
In addition, the step of obtaining the fifth idling value of the particle mass of the particle trap is to obtain the particle mass of the particle trap, calculate the idling processing value corresponding to the particle mass of the particle trap by a falling-idling method according to the particle mass of the particle trap, determine whether the test temperature corresponding to the idling processing value meets a preset safe temperature standard, and if the test temperature corresponding to the idling processing value meets the preset safe temperature standard, use the idling processing value as the fifth idling value of the particle mass of the particle trap.
Further, it should be appreciated that the step of obtaining the particle mass of the particle trap is returned when the test temperature corresponding to the idle process value does not meet the preset safe temperature standard.
Further, for ease of understanding, the following is exemplified:
the experiment step for obtaining the idle speed target value corresponding to the particle mass of the particle catcher is an experiment method for determining the corresponding relation between the particle mass and the idle speed target:
the core of the test is a drop-idle DTI test.
The normal regeneration temperature of the particle catcher is about 620 ℃, when the front temperature of the particle catcher reaches 620 ℃, the oxidation reaction of the internal particles starts to occur, when the rotating speed of the engine is reduced to idle speed, the oxidation reaction can still be performed spontaneously, namely the combustion of the particles, the internal temperature of the particle catcher generates a process of gradually increasing and then gradually decreasing, and the highest value of the temperature is recorded to be used as a standard for judging whether the regeneration of the particle catcher is safe. For example, the regeneration temperature of the particle trap is 620 ℃, but the internal temperature is up to 1150 ℃ at the highest, and whether the regeneration of the particle trap is safe is determined by combining the temperature limits of the carrier and the coating itself.
The test method for obtaining the relation between the idle speed and the particle mass comprises the following steps:
regeneration and emptying: controlling the regeneration temperature within 620 +/-20 ℃, ensuring that the volume percentage of the pre-oxygen is not less than 5%, carrying out regeneration for about 1h, ensuring completely emptied medium particles, and then weighing the particles to be used as the unloaded mass.
Carbon accumulation: loading of the pellets on an engine for carbon accumulation, confirming by weighing that the pellet mass is equal to 12g/l (g/l, unit, pellet mass/carrier volume);
DTI test: adjusting the working condition of the engine to 2000rpm @100Nm (the working condition is determined according to the engine), modifying ECU parameters to enable the engine to enter a regeneration mode, rapidly adjusting the rotating speed of the engine to 1200rpm idle speed when the temperature of the front end of the internal carrier (generally, the central position 15mm away from the front end surface of the carrier and can be adjusted according to the size of the carrier) reaches 620 ℃, and recording the highest internal temperature at the moment. And whether the sample is cracked or fused is checked, and the following test is continued under the condition that the sample is intact, and the sample which is replaced if the sample is damaged is continued to be tested.
Empty again, accumulate carbon, and run a DTI test at 1100rpm idle, recording the maximum internal temperature.
Emptying and accumulating carbon again, carrying out a DTI test at an idle speed of 1000rpm, and recording the internal temperature;
and by analogy, gradually reducing the idle speed to perform a DTI test until the idle speed of 750rpm is finished, wherein the DTI test of 12g/l carbon load is completed.
The experimental data were collated and the following table was output: (in this case, 1375 ℃ is the highest display temperature of the sensor, 1375 ℃ means that the actual temperature is higher than 1375 ℃.)
The above 1-7 steps were repeated for a maximum DTI temperature of 10g/l pellet mass, yielding the following data:
the above 1-7 steps were repeated for a DTI maximum temperature of 8g/l pellet mass, yielding the following data:
the DTI maximum temperature for a mass of 7g/l of granulate was repeated using the above 1-7 steps, resulting in the following data:
the above 1-7 steps were repeated for a maximum DTI temperature of 6g/l pellet mass, yielding the following data:
the safe temperature of the support in this case is 1100 ℃ according to the maximum temperature limit. The safe idle speed under each accumulated carbon amount can be obtained from the graph:
| particle mass (g/l) | 6 | 7 | 8 | 10 | 12 |
| Safe idle speed rpm | 750 | 770 | 850 | 1050 | 1200 |
Step S40: comparing the idle value in the first dimension to the idle value in the second dimension.
In addition, idle speed values of the first idle speed value, the second idle speed value, the third idle speed value, the fourth idle speed value and the fifth idle speed value are compared to obtain a comparison result.
Further, for ease of understanding, the following is exemplified:
comparing the first idle speed value with the second idle speed value, if the first idle speed value is greater than the second idle speed value, comparing the first idle speed value with the third idle speed value, if the first idle speed value is greater than the third idle speed value, comparing the first idle speed value with the fourth idle speed value, if the first idle speed value is greater than the fourth idle speed value, comparing the first idle speed value with the fifth idle speed value, and if the first idle speed value is greater than the fifth idle speed value, selecting the first idle speed value as a target idle speed value of the diesel engine.
Step S50: and determining a target idle speed value of the diesel engine according to the comparison result.
It is to be understood that the maximum idling value is selected from the above comparison results and is taken as the diesel engine target idling value.
This embodiment is through obtaining the idle value under the first dimension of diesel engine to obtain the current state of particle trapper, detect whether the current state of particle trapper is in the preset state, if the current state of particle trapper is in the preset state, then obtain the idle value under the second dimension of diesel engine, with idle value under the first dimension with idle value under the second dimension compares, according to the result of comparison, confirms diesel engine target idle value, through above-mentioned mode, has realized the carbon carrying capacity of make full use of particle trapper, has guaranteed the safe regeneration of particle trapper, under the circumstances of reduce cost, thereby has reduced whole car oil consumption to improve the driving impression.
Referring to fig. 3, fig. 3 is a flowchart illustrating a method for obtaining an idle target value of a diesel engine according to a second embodiment of the present invention.
Based on the first embodiment, the steps S40 and S50 in the method for obtaining the idle speed target value of the diesel engine in the embodiment specifically include:
step S401: the idle values in the first dimension include first idle values at different coolant temperatures, second idle values at different vehicle gears, third idle values at different vehicle-mounted diagnostic faults, and fourth idle values at a regeneration state of the particle trap, and the idle values in the second dimension include a fifth idle value of the particle mass of the particle trap.
Step S402: and comparing the idle values of the first idle value, the second idle value, the third idle value, the fourth idle value and the fifth idle value to obtain a comparison result.
In addition, idle speed values of the first idle speed value, the second idle speed value, the third idle speed value, the fourth idle speed value and the fifth idle speed value are compared to obtain a comparison result.
Further, for ease of understanding, the following is exemplified:
comparing the first idle speed value with the second idle speed value, if the first idle speed value is greater than the second idle speed value, comparing the first idle speed value with the third idle speed value, if the first idle speed value is greater than the third idle speed value, comparing the first idle speed value with the fourth idle speed value, if the first idle speed value is greater than the fourth idle speed value, comparing the first idle speed value with the fifth idle speed value, and if the first idle speed value is greater than the fifth idle speed value, selecting the first idle speed value as a target idle speed value of the diesel engine.
Step S501: and selecting a maximum idle speed value from the first idle speed value, the second idle speed value, the third idle speed value, the fourth idle speed value and the fifth idle speed value according to the comparison result, and taking the maximum idle speed value as a diesel engine idle speed target value.
It is to be understood that the maximum idling value is selected from the above comparison results and is taken as the diesel engine target idling value.
In the embodiment, the carbon carrying capacity of the particle trap is fully utilized by comparing the idle values in the first dimension, which include a first idle value at different coolant temperatures, a second idle value at different vehicle gears, a third idle value at different vehicle-mounted diagnostic faults, and a fourth idle value at the regeneration state of the particle trap, with the idle values in the second dimension, which include a fifth idle value of the particle mass of the particle trap, to obtain a comparison result, selecting a maximum idle value from the first idle value, the second idle value, the third idle value, the fourth idle value, and the fifth idle value according to the comparison result, and using the maximum idle value as a diesel engine idle target value, the size of the particle catcher is reduced, the cost is reduced, the purpose of protecting the regeneration of the particle catcher is achieved while the size of the particle catcher is reduced, and the DPF is prevented from being damaged by high temperature, so that the oil consumption of the whole vehicle is reduced, and the driving feeling is improved.
Furthermore, an embodiment of the present invention further provides a storage medium, which stores a program for acquiring a diesel idle target value, and the program for acquiring a diesel idle target value is executed by a processor to implement the steps of the method for acquiring a diesel idle target value as described above.
Referring to fig. 4, fig. 4 is a block diagram illustrating a first embodiment of the apparatus for obtaining an idle target value of a diesel engine according to the present invention.
As shown in fig. 4, the apparatus for obtaining an idle target value of a diesel engine according to an embodiment of the present invention includes: the acquisition module 4001 is used for acquiring an idle speed value of the diesel engine in a first dimension and acquiring the current state of the particle trap; a detection module 4002, configured to detect whether a current state of the particle trap is a preset state; a result module 4003, configured to obtain an idle speed value in a second dimension of the diesel engine if the current state is the preset state; a comparison module 4004 configured to compare an idle value in the first dimension with an idle value in the second dimension; and the determining module 4005 is used for determining the target idle speed value of the diesel engine according to the comparison result.
The acquisition module 4001 acquires an idle value in a first dimension of the diesel engine and acquires an operation of a current state of the particle trap.
The first dimension includes coolant temperature, vehicle gear, on-board diagnostics OBD malfunction, and regeneration status of the particle trap.
It is to be understood that a first idle value at different coolant temperatures, a second idle value at different vehicle gears, a third idle value at different on-board diagnostics OBD faults and a fourth idle value at regeneration status of the particle trap are obtained.
The detection module 4002 detects an operation of whether a current state of the particle trap is a preset state.
It is noted that it is detected whether the current state of the particle catcher is the regeneration state.
The result module 4003 obtains an operation of an idle value of the diesel engine in a second dimension if the current state is the preset state.
It is to be understood that said second dimension comprises the particle mass of the particle trap, and that a fifth idle value of the particle mass of the particle trap is obtained if said particle trap is in said regeneration state.
In addition, the step of obtaining the fifth idling value of the particle mass of the particle trap is to obtain the particle mass of the particle trap, calculate the idling processing value corresponding to the particle mass of the particle trap by a falling-idling method according to the particle mass of the particle trap, determine whether the test temperature corresponding to the idling processing value meets a preset safe temperature standard, and if the test temperature corresponding to the idling processing value meets the preset safe temperature standard, use the idling processing value as the fifth idling value of the particle mass of the particle trap.
Further, it should be appreciated that the step of obtaining the particle mass of the particle trap is returned when the test temperature corresponding to the idle process value does not meet the preset safe temperature standard.
Further, for ease of understanding, the following is exemplified:
the experiment step for obtaining the idle speed target value corresponding to the particle mass of the particle catcher is an experiment method for determining the corresponding relation between the particle mass and the idle speed target:
the core of the test is a drop-idle DTI test.
The normal regeneration temperature of the particle catcher is about 620 ℃, when the front temperature of the particle catcher reaches 620 ℃, the oxidation reaction of the internal particles starts to occur, when the rotating speed of the engine is reduced to idle speed, the oxidation reaction can still be performed spontaneously, namely the combustion of the particles, the internal temperature of the particle catcher generates a process of gradually increasing and then gradually decreasing, and the highest value of the temperature is recorded to be used as a standard for judging whether the regeneration of the particle catcher is safe. For example, the regeneration temperature of the particle trap is 620 ℃, but the internal temperature is up to 1150 ℃ at the highest, and whether the regeneration of the particle trap is safe is determined by combining the temperature limits of the carrier and the coating itself.
The test method for obtaining the relation between the idle speed and the particle mass comprises the following steps:
regeneration and emptying: controlling the regeneration temperature within 620 +/-20 ℃, ensuring that the volume percentage of the pre-oxygen is not less than 5%, carrying out regeneration for about 1h, ensuring completely emptied medium particles, and then weighing the particles to be used as the unloaded mass.
Carbon accumulation: loading of the pellets on an engine for carbon accumulation, confirming by weighing that the pellet mass is equal to 12g/l (g/l, unit, pellet mass/carrier volume);
DTI test: adjusting the working condition of the engine to 2000rpm @100Nm (the working condition is determined according to the engine), modifying ECU parameters to enable the engine to enter a regeneration mode, rapidly adjusting the rotating speed of the engine to 1200rpm idle speed when the temperature of the front end of the internal carrier (generally, the central position 15mm away from the front end surface of the carrier and can be adjusted according to the size of the carrier) reaches 620 ℃, and recording the highest internal temperature at the moment. And whether the sample is cracked or fused is checked, and the following test is continued under the condition that the sample is intact, and the sample which is replaced if the sample is damaged is continued to be tested.
Empty again, accumulate carbon, and run a DTI test at 1100rpm idle, recording the maximum internal temperature.
Emptying and accumulating carbon again, carrying out a DTI test at an idle speed of 1000rpm, and recording the internal temperature;
and by analogy, gradually reducing the idle speed to perform a DTI test until the idle speed of 750rpm is finished, wherein the DTI test of 12g/l carbon load is completed.
The experimental data were collated and the following table was output: (in this case 1375 ℃ C. is the highest display temperature of the sensor, 1375 ℃ C. means that the actual temperature is higher than 1375 ℃ C.).
The above 1-7 steps were repeated for a maximum DTI temperature of 10g/l pellet mass, yielding the following data:
the above 1-7 steps were repeated for a DTI maximum temperature of 8g/l pellet mass, yielding the following data:
the DTI maximum temperature for a mass of 7g/l of granulate was repeated using the above 1-7 steps, resulting in the following data:
the above 1-7 steps were repeated for a maximum DTI temperature of 6g/l pellet mass, yielding the following data:
the safe temperature of the support in this case is 1100 ℃ according to the maximum temperature limit. The safe idle speed under each accumulated carbon amount can be obtained from the graph:
| particle mass (g/l) | 6 | 7 | 8 | 10 | 12 |
| Safe idle speed rpm | 750 | 770 | 850 | 1050 | 1200 |
The comparison module 4004 compares the idle value in the first dimension to the idle value in the second dimension.
In addition, idle speed values of the first idle speed value, the second idle speed value, the third idle speed value, the fourth idle speed value and the fifth idle speed value are compared to obtain a comparison result.
Further, for ease of understanding, the following is exemplified:
comparing the first idle speed value with the second idle speed value, if the first idle speed value is greater than the second idle speed value, comparing the first idle speed value with the third idle speed value, if the first idle speed value is greater than the third idle speed value, comparing the first idle speed value with the fourth idle speed value, if the first idle speed value is greater than the fourth idle speed value, comparing the first idle speed value with the fifth idle speed value, and if the first idle speed value is greater than the fifth idle speed value, selecting the first idle speed value as a target idle speed value of the diesel engine.
The determination module 4005 determines an operation of the target idle speed value of the diesel engine based on the comparison.
It is to be understood that the maximum idling value is selected from the above comparison results and is taken as the diesel engine target idling value.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
This embodiment is through obtaining the idle value under the first dimension of diesel engine to obtain the current state of particle trapper, detect whether the current state of particle trapper is in the preset state, if the current state of particle trapper is in the preset state, then obtain the idle value under the second dimension of diesel engine, with idle value under the first dimension with idle value under the second dimension compares, according to the result of comparison, confirms diesel engine target idle value, through above-mentioned mode, has realized the carbon carrying capacity of make full use of particle trapper, has guaranteed the safe regeneration of particle trapper, under the circumstances of reduce cost, thereby has reduced whole car oil consumption to improve the driving impression.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not elaborated in this embodiment may be referred to a method for obtaining the idle speed target value of the diesel engine provided in any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method of obtaining a target idle speed value for a diesel engine, the method comprising:
acquiring an idle speed value of the diesel engine in a first dimension, and acquiring the current state of the particle catcher;
detecting whether the current state of the particle catcher is a preset state or not;
if the current state is the preset state, acquiring an idle speed value of the diesel engine in a second dimension;
comparing the idle value in the first dimension to the idle value in the second dimension;
and determining a target idle speed value of the diesel engine according to the comparison result.
2. The method of claim 1, wherein the first dimension includes coolant temperature, vehicle gear, on-board diagnostics (OBD) malfunction, and regeneration status of a particle trap;
the step of obtaining the idle speed value of the diesel engine in the first dimension comprises the following steps:
and acquiring a first idle speed value under different coolant temperatures, a second idle speed value under different vehicle gears, a third idle speed value under different vehicle-mounted diagnosis faults and a fourth idle speed value under the regeneration state of the particle catcher.
3. The method of claim 2, wherein the predetermined state is a regeneration state, and the second dimension comprises a particle mass of a particle trap;
if the current state is the preset state, the step of obtaining the idle speed value of the diesel engine in the second dimension comprises the following steps:
if the current state of the particle trap is the regeneration state, a fifth idle value of the particle mass of the particle trap is obtained.
4. The method of claim 3, wherein the step of obtaining a fifth idle value for the particle mass of the particle trap comprises:
acquiring the particle mass of the particle catcher;
calculating an idling processing value corresponding to the particle mass of the particle catcher by an idling reduction method according to the particle mass of the particle catcher;
judging whether the test temperature corresponding to the idle speed processing value meets a preset safe temperature standard or not;
and if the test temperature corresponding to the idle speed processing value meets the preset safe temperature standard, taking the idle speed processing value as a fifth idle speed value of the particle mass of the particle catcher.
5. The method of claim 4, wherein the step of determining whether the test temperature corresponding to the idle speed process value meets the predetermined safe temperature criteria is followed by the step of:
and if the test temperature corresponding to the idle speed processing value does not meet the preset safe temperature standard, returning to the step of obtaining the particle quality of the particle catcher.
6. The method of claim 5, wherein the step of comparing the idle value in the first dimension to the idle value in the second dimension comprises:
and comparing the idle values of the first idle value, the second idle value, the third idle value, the fourth idle value and the fifth idle value to obtain a comparison result.
7. The method of claim 6, wherein the step of determining the target diesel idle speed value based on the comparison comprises:
and selecting a maximum idle speed value from the first idle speed value, the second idle speed value, the third idle speed value, the fourth idle speed value and the fifth idle speed value according to the comparison result, and taking the maximum idle speed value as a diesel engine idle speed target value.
8. An apparatus for obtaining an idle target value of a diesel engine, the apparatus comprising:
the acquisition module is used for acquiring an idle speed value of the diesel engine in a first dimension and acquiring the current state of the particle catcher;
the detection module is used for detecting whether the current state of the particle catcher is a preset state or not;
the result module is used for acquiring an idle speed value of the diesel engine in a second dimension if the current state is the preset state;
the comparison module is used for comparing the idle value in the first dimension with the idle value in the second dimension;
and the determining module is used for determining the target idle speed value of the diesel engine according to the comparison result.
9. An electronic device, characterized in that the device comprises: a memory, a processor and a get diesel idle target value program stored on the memory and executable on the processor, the get diesel idle target value program configured to implement the steps of the method of getting a diesel idle target value as claimed in any one of claims 1 to 7.
10. A storage medium having stored thereon a program for obtaining a diesel idle target value, the program for obtaining a diesel idle target value being executed by a processor to implement the steps of the method for obtaining a diesel idle target value as claimed in any one of claims 1 to 7.
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| CN201911217332.4A CN110821690B (en) | 2019-11-28 | 2019-11-28 | Method, device and equipment for acquiring idle speed target value of diesel engine and storage medium |
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