CN115263577B - Compression ignition engine control method and related equipment - Google Patents
Compression ignition engine control method and related equipment Download PDFInfo
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- CN115263577B CN115263577B CN202210784000.XA CN202210784000A CN115263577B CN 115263577 B CN115263577 B CN 115263577B CN 202210784000 A CN202210784000 A CN 202210784000A CN 115263577 B CN115263577 B CN 115263577B
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- 238000002485 combustion reaction Methods 0.000 claims description 53
- 239000000446 fuel Substances 0.000 claims description 22
- 238000004590 computer program Methods 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
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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
- F02D41/0002—Controlling intake air
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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
- F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
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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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/401—Controlling injection timing
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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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1012—Engine speed gradient
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The application discloses a compression ignition engine control method and related equipment. The method comprises the following steps: acquiring crank angle acceleration information of a target engine; acquiring angular acceleration fluctuation information corresponding to the target time based on the crank angular acceleration information; and controlling the target engine to operate according to the angular acceleration fluctuation information. Compared with the existing method for controlling the compression ignition engine by measuring the in-cylinder pressure through the in-cylinder sensor, the compression ignition engine control method provided by the embodiment of the application has the advantages that the use of related components is reduced, the manufacturing cost of the engine is reduced, the possibility of gas leakage caused by the loose seal of the in-cylinder sensor is reduced, the maintenance difficulty and the cost of the engine are reduced, and a more economical and effective control method is provided for the compression ignition engine.
Description
Technical Field
The present disclosure relates to the field of engine control, and more particularly, to a compression ignition engine control method and related apparatus.
Background
The compression ignition engine mixes a small amount of fuel oil with a large amount of air, and after the mixture is compressed to a certain pressure, the spark plug is used for spark ignition to ignite part of the gas-oil mixture near the spark plug, so that the pressure in the cylinder is further increased, and the rest of the gas-oil mixture reaches a compression ignition condition to achieve compression ignition combustion. In order to achieve both suppression of combustion noise and improvement of fuel consumption performance in an electric spark ignition excitation type compression ignition engine, it is necessary to monitor combustion stability of the compression ignition engine in real time and make targeted adjustments.
In some compression ignition engine control methods, a pressure signal of a cylinder pressure sensor is often used to reflect the fuel heat release rate, so as to infer the compression ignition state in the cylinder, further infer the gas temperature in the cylinder and the deviation from the target temperature, so as to characterize the compression ignition stability, and then correct various control parameters to correct the actual compression ignition and the phase to achieve the target state through the deviation of the temperature in the cylinder. Because the cylinder pressure sensor is adopted, the manufacturing cost of the engine assembly is greatly increased, the compression ignition and phase control process is complex, and the control precision of the control system is reduced.
Disclosure of Invention
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to provide an intelligent and stable compression ignition engine control method, in a first aspect, the invention provides a compression ignition engine control method, which comprises the following steps:
acquiring crank angle acceleration information of a target engine;
acquiring angular acceleration fluctuation information corresponding to the target time based on the crank angular acceleration information;
And controlling the target engine to operate according to the angular acceleration fluctuation information.
Optionally, the angular acceleration fluctuation information includes angular acceleration variance information;
The controlling the target engine operation based on the angular acceleration fluctuation information includes:
and controlling the target engine to work according to the angular acceleration variance information.
Optionally, the controlling the target engine to operate according to the angular acceleration fluctuation information includes:
And controlling the fuel injection phase to advance by a first preset angle under the condition that the angular acceleration fluctuation information is larger than a first preset threshold value and smaller than or equal to a second preset threshold value.
Optionally, the method further comprises:
and controlling the intake phase to lag by a second preset angle under the condition that the angular acceleration fluctuation information is larger than the second preset threshold and smaller than or equal to a third preset threshold.
Optionally, the method further comprises:
And when the angular acceleration fluctuation information is greater than the third preset threshold value, reducing the target air quantity entering the combustion chamber of the engine to reduce the excessive air coefficient corresponding to the target engine.
Optionally, the method further comprises:
And when the angular acceleration fluctuation information is greater than the third preset threshold value and is smaller than or equal to a fourth preset threshold value, reducing the supercharging pressure to reduce the excessive air coefficient corresponding to the target engine.
Optionally, the method further comprises:
and if the angular acceleration fluctuation information is greater than the fourth preset threshold value, reducing the preset opening degree of the throttle valve to reduce the excessive air coefficient corresponding to the target engine.
In a second aspect, the present invention also provides a compression ignition engine control apparatus comprising:
A first acquisition unit configured to acquire crank angle acceleration information of a target engine;
a second acquisition unit for acquiring angular acceleration fluctuation information corresponding to a target time based on the crank angular acceleration information;
And a control unit configured to control the target engine operation based on the angular acceleration fluctuation information.
In a third aspect, an electronic device, comprising: a memory, a processor and a computer program stored in and executable on the processor for performing the steps of the compression ignition engine control method according to any one of the first aspects described above when the computer program stored in the memory is executed.
In a fourth aspect, the invention also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the compression ignition engine control method of any of the first aspects.
In summary, the compression ignition engine control method of the embodiment of the application comprises the following steps: acquiring crank angle acceleration information of a target engine; acquiring angular acceleration fluctuation information corresponding to the target time based on the crank angular acceleration information; and controlling the target engine to operate according to the angular acceleration fluctuation information. According to the compression ignition engine control method provided by the embodiment of the application, the crankshaft acceleration fluctuation information is obtained by processing the crankshaft rotation speed information collected by the crankshaft rotation speed signal panel in the compression ignition engine, and the crankshaft acceleration fluctuation information is used as a judgment index for judging the stable combustion of the compression ignition engine to control the stable combustion of the compression ignition engine. Compared with the existing method for controlling the pressure in the cylinder by measuring the pressure in the cylinder through the in-cylinder sensor, the method reduces the use of related components, reduces the manufacturing cost of the engine, reduces the possibility of gas leakage caused by the loose seal of the in-cylinder sensor, reduces the maintenance difficulty and cost of the engine, and provides a more economic and effective control method for the compression ignition engine.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic flow chart of a control method of a compression ignition engine according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a control device for a compression ignition engine according to an embodiment of the present application;
Fig. 3 is a schematic structural diagram of a control electronic device for a compression ignition engine according to an embodiment of the present application.
Detailed Description
According to the compression ignition engine control method provided by the embodiment of the application, the crankshaft rotation speed information collected by the crankshaft rotation speed signal panel in the compression ignition engine is processed to obtain the crankshaft acceleration fluctuation information, and the crankshaft acceleration fluctuation information is used as a judgment index for judging the stable combustion of the compression ignition engine to control the stable combustion of the compression ignition engine. Compared with the existing method for controlling the pressure in the cylinder by measuring the pressure in the cylinder through the in-cylinder sensor, the method reduces the use of related components, reduces the manufacturing cost of the engine, reduces the possibility of gas leakage caused by the loose seal of the in-cylinder sensor, reduces the maintenance difficulty and cost of the engine, and provides a more economic and effective control method for the compression ignition engine.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, 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 described herein may be implemented in other sequences 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. The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.
It is understood that compression ignition combustion occurs when the in-cylinder temperature reaches a firing temperature determined by the composition of the mixture. When the in-cylinder temperature reaches the ignition temperature in the vicinity of the compression top dead center to cause compression ignition combustion, the fuel consumption efficiency of the spark plug ignition control compression ignition combustion can be maximized. The spark ignition and compression ignition combustion is realized by two pressure rises, namely, pressure rise caused by compression work of a piston in an in-cylinder pressure compression stroke and pressure rise caused by heat release of spark plug ignition combustion. If compression ignition combustion is caused near compression top dead center during compression ignition combustion, in-cylinder pressure may excessively rise and combustion noise may become excessive. If the over-ignition period is retarded, compression ignition combustion is caused at a period when the piston is significantly lowered in the expansion stroke, and at this time, combustion noise can be suppressed, but the fuel consumption efficiency of the engine is lowered and the power supplied is reduced. In order to achieve both suppression of combustion noise and improvement of fuel consumption performance in an electric spark ignition excitation type compression ignition engine, it is necessary to monitor combustion stability of the compression ignition engine in real time and make targeted adjustments.
In some compression ignition engine control methods, a pressure signal of a cylinder pressure sensor is often used to reflect the fuel heat release rate, so as to infer the compression ignition state in the cylinder, further infer the gas temperature in the cylinder and the deviation from the target temperature, so as to characterize the compression ignition stability, and then correct various control parameters to correct the actual compression ignition and the phase to achieve the target state through the deviation of the temperature in the cylinder. Because the cylinder pressure sensor is adopted, the manufacturing cost of the engine assembly is greatly increased, the compression ignition and phase control process is complex, and the control precision of the control system is reduced.
In order to solve the above problems, referring to fig. 1, a flow chart of a compression ignition engine control method provided in an embodiment of the present application may specifically include:
S110, acquiring crank angle acceleration information of a target engine;
the crankshaft rotation speed information is obtained by an ECU (Electronic Control Unit ) while other signals need to be obtained from the electronic control unit, and specifically, the other signals may be a throttle opening signal, an intake manifold pressure signal, an intake manifold temperature signal, an oxygen concentration signal in exhaust gas, an exhaust gas temperature signal, an intake and exhaust valve timing phase signal, an EGR valve opening signal, a coolant temperature signal, an engine oil temperature signal, an injection phase signal, an injection pulse width signal, an injection pressure signal, an ignition angle signal, and the like. The target engine in the present application is a compression ignition engine.
In some engines, a crankshaft rotation speed signal disc is often adopted to determine the rotation speed of a crankshaft, in some crankshaft rotation speed discs, in order to determine the position of a top dead center, the signal disc corresponding to an original crankshaft rotation speed signal is generally 58 teeth, 2 teeth are omitted, in order to improve the control precision of the engine, continuous interpolation processing is required to be carried out on the missing 2 teeth signals, filtering processing can be carried out after difference processing, crankshaft rotation speed information is converted into angular speed information, and then angular acceleration information is determined according to the angular speed information.
The relationship between the angular velocity ω and the rotational speed n is ω=2ρn (the frequency n has the same meaning as the rotational speed here), and the angular velocity signal is obtained by converting the crankshaft rotational speed signal into the angular velocity signal according to the above conversion relationship, and then performing derivative calculation on the angular velocity signal to obtain a signal composed of derivative values, which is the angular acceleration signal corresponding to the crankshaft rotational speed signal.
S120, acquiring angular acceleration fluctuation information corresponding to target time based on the crank angular acceleration information;
illustratively, angular acceleration fluctuation information within the target time is acquired from the angular acceleration information obtained in step S110. The angular acceleration fluctuation information may be information such as a range, a variance, etc. The target time may be adjusted accordingly based on the engine speed. The angular acceleration fluctuation information may be focused only on compressing the crank angle range of 40 degrees from top dead center to top dead center, which is the range corresponding to compression ignition combustion.
And S130, controlling the target engine to work according to the angular acceleration fluctuation information.
The combustion stability of the compression ignition engine can be well represented according to the angular acceleration fluctuation information, and the combustion stability is used as an index for controlling the compression ignition engine, so that the current working state of the compression ignition engine is adjusted to meet the target working state, and the target engine is controlled to stably burn.
In summary, according to the compression ignition engine control method provided by the embodiment of the application, the crankshaft rotation speed information collected by the crankshaft rotation speed signal panel in the compression ignition engine is processed to obtain the crankshaft acceleration fluctuation information, and the crankshaft acceleration fluctuation information is used as a judgment index for judging the stable combustion of the compression ignition engine to control the stable combustion of the compression ignition engine. Compared with the existing method for controlling the pressure in the cylinder by measuring the pressure in the cylinder through the in-cylinder sensor, the method reduces the use of related components, reduces the manufacturing cost of the engine, reduces the possibility of gas leakage caused by the loose seal of the in-cylinder sensor, reduces the maintenance difficulty and cost of the engine, and provides a more economic and effective control method for the compression ignition engine.
In some examples, the angular acceleration fluctuation information includes angular acceleration variance information;
The controlling the target engine operation based on the angular acceleration fluctuation information includes:
and controlling the target engine to work according to the angular acceleration variance information.
For example, the angular acceleration fluctuation information may be variance information of the angular acceleration at the target time, and the variance may represent a difference between each variable and the overall average, so that the variation degree of the acceleration can be well represented, and thus, the stable combustion effect of the compression ignition engine can be accurately represented.
In some examples, controlling the target engine operation based on the angular acceleration fluctuation information includes:
And controlling the fuel injection phase to advance by a first preset angle under the condition that the angular acceleration fluctuation information is larger than a first preset threshold value and smaller than or equal to a second preset threshold value.
For example, in the case where the angular acceleration fluctuation information is less than or equal to the first preset threshold, the target engine is considered to be in a stable compression ignition combustion state, and no adjustment is required to the given combustion strategy of the target engine. If the angular acceleration fluctuation information is larger than a first preset threshold value and smaller than or equal to a second preset threshold value, judging that the target engine is in a state of unstable compression ignition combustion at the moment, and possibly, the condition that the fuel and air are uniformly mixed and cannot meet the stable compression ignition combustion of the compression ignition engine is possibly existed, at the moment, adjusting the fuel injection phase, and leading the fuel injection phase to advance by a first preset angle so as to fully mix the fuel and the inhaled air before the compression ignition condition is reached, thereby improving the stability of the compression ignition combustion, reducing noise generated by the compression ignition and improving the thermal efficiency of the compression ignition combustion. It can be understood that the first preset angle can be used for performing calibration tests according to different working conditions of different compression ignition engines, and inquiring the corresponding preset angle in a specific control process to control the compression ignition engines.
In summary, according to the compression ignition engine control method provided by the embodiment of the application, the combustion of the compression ignition engine is controlled through the angular acceleration fluctuation information, and under the condition that the acceleration fluctuation information of the target engine is larger than the first preset threshold value and smaller than or equal to the second preset threshold value, the fuel injection phase is controlled to advance to enhance the mixing effect of fuel and air, so that the stability of compression ignition combustion is improved.
In some examples, the above method further comprises:
and controlling the intake phase to lag by a second preset angle under the condition that the angular acceleration fluctuation information is larger than the second preset threshold and smaller than or equal to a third preset threshold.
For example, in the case where the angular acceleration fluctuation information is at the above second preset threshold value and is less than or equal to the third preset threshold value, the intake air phase is controlled to lag by the second preset angle. The high pressure difference between the external pressure of the air outlet valve and the internal pressure difference of the combustion chamber can be ensured to be kept for a longer time by controlling the air inlet phase lag, so that the waste gas in the previous cycle is fully discharged out of the cylinder body, and the fresh air and the fuel oil are fully mixed in the current cycle, thereby improving the combustion stability.
In summary, according to the compression ignition engine control method provided by the embodiment of the application, when the angular acceleration fluctuation information is larger than the second preset threshold and smaller than or equal to the third preset threshold, the air inlet phase is controlled to lag by the second preset angle, so that the waste gas generated in the last working cycle can be discharged into the cylinder as much as possible, the mixing effect of fuel oil and fresh air is improved, and the compression ignition stability is improved.
In some examples, the above method further comprises:
And when the angular acceleration fluctuation information is greater than the third preset threshold value, reducing the target air quantity entering the combustion chamber of the engine to reduce the excessive air coefficient corresponding to the target engine.
The compression ignition engine is exemplified by mixing a small amount of fuel oil with a large amount of air, and performing spark ignition by a spark plug after compressing to a certain pressure to ignite part of the gas-oil mixture near the spark plug to further raise the in-cylinder pressure, so that the rest of the gas-oil mixture reaches a compression ignition condition to achieve compression ignition combustion. In order to make compression ignition engines more energy efficient, it is sought to blend less fuel with more air for compression ignition combustion. However, in the case that the angular acceleration fluctuation information exceeds the third preset threshold, the stability of compression ignition cannot be sufficiently improved by other adjustment methods, and at this time, the air amount entering the combustion chamber of the engine needs to be reduced to reduce the excess air ratio, that is, the ratio of air to fuel is reduced, so as to improve the stability of compression ignition combustion.
In summary, in the compression ignition engine control method provided by the embodiment of the application, under the condition that the angular acceleration fluctuation information is greater than the third preset threshold value, the target air quantity entering the engine combustion chamber is reduced so as to reduce the excessive air coefficient corresponding to the target engine, thereby improving the stability of compression ignition combustion.
In some examples, the above method further comprises:
And when the angular acceleration fluctuation information is greater than the third preset threshold value and is smaller than or equal to a fourth preset threshold value, reducing the supercharging pressure to reduce the excessive air coefficient corresponding to the target engine.
For example, in some compression ignition engines, a boost system is often employed to increase the amount of air that is drawn into the compression ignition engine during an intake event, and may include a turbocharger system, a supercharger system, and the like. When the angular acceleration fluctuation information is larger than the third preset threshold value and smaller than or equal to the fourth preset threshold value, the work power of the supercharging system can be reduced to reduce the supercharging pressure, so that the excessive air coefficient corresponding to the target engine is reduced, and the effect of improving the combustion stability is achieved.
In summary, according to the method provided by the embodiment of the application, under the condition that the angular acceleration fluctuation information is larger than the third preset threshold and smaller than or equal to the fourth preset threshold, the supercharging pressure can be reduced by reducing the power of the supercharging system so as to reduce the excessive air coefficient corresponding to the target engine, and the stability of compression ignition combustion is improved.
In some examples, the above method further comprises:
and if the angular acceleration fluctuation information is greater than the fourth preset threshold value, reducing the preset opening degree of the throttle valve to reduce the excessive air coefficient corresponding to the target engine.
For example, under the condition that the acceleration fluctuation information is the fourth preset threshold, the effect of sufficiently improving the compression ignition stability cannot be achieved simply by reducing the boost pressure of the boost system, and at this time, the excessive air coefficient corresponding to the target engine can be reduced by reducing the preset opening of the throttle valve, so that the stability of compression ignition combustion is improved.
In summary, according to the compression ignition engine control method provided by the embodiment of the application, the stability of compression ignition combustion is judged through the angular acceleration fluctuation information, quantitative analysis is carried out on the stability of compression ignition combustion through the angular acceleration fluctuation information, and different adjustment measures are adopted for different unstable conditions, so that the influence on fuel economy is reduced as much as possible while the stability of compression ignition combustion is improved.
In some examples, the angular acceleration fluctuation information may be angular acceleration variance information cov, the first preset threshold may be 3%, the second preset threshold may be 4%, the third preset threshold may be 5%, and the fourth preset threshold may be 6%. During compression ignition engine control, if cov% or less characterizes that the compression ignition stability of the target engine is within an acceptable range, the control strategy of the target engine is not adjusted. When cov% is more than 3% and less than or equal to 4%, the target engine is considered to generate a slight combustion instability phenomenon, and the fuel injection phase is controlled to advance by 5 degrees so as to improve the fuel atomization effect and improve the stability of compression ignition until cov is reduced to below 3%. When cov% of the target engine is more than 4% and less than or equal to 5%, the instability of compression ignition is considered to be relatively serious at the moment, the phase delay of the air inlet is required to be 1 degree at the moment, so that the waste gas generated in the last working cycle is discharged into the cylinder as much as possible, the mixing effect of fuel oil and fresh air is improved, and the stability of compression ignition is improved until cov is reduced to below 3%. When cov% or more and 6% or less of the target engine is used, the instability of compression ignition is considered to be serious, and the stability of compression ignition is improved by reducing the supercharging pressure to reduce the excess air ratio in the cylinder until cov is reduced to below 3%. When cov% of the target engine is more than 6%, it is considered that serious unstable compression ignition occurs, and the opening degree of the throttle valve is reduced by 5% at this time, the intake air amount is reduced to reduce the excess air ratio, so that the stability of compression ignition is improved.
Referring to fig. 2, an embodiment of a control device for a fuel-fired engine according to an embodiment of the present application may include:
a first acquisition unit 21 for acquiring crank angle acceleration information of a target engine;
A second acquisition unit 22 for acquiring angular acceleration fluctuation information corresponding to a target time based on the crank angular acceleration information;
a control unit 23 for controlling the target engine operation based on the angular acceleration fluctuation information.
As shown in fig. 3, the embodiment of the present application further provides an electronic device 300, including a memory 310, a processor 320, and a computer program 311 stored in the memory 320 and executable on the processor, wherein the processor 320 implements any of the steps of the method for controlling a compression ignition engine described above when executing the computer program 311.
Since the electronic device described in this embodiment is a device for implementing a compression ignition engine control apparatus in this embodiment of the present application, those skilled in the art will be able to understand the specific implementation of the electronic device in this embodiment and various modifications thereof based on the method described in this embodiment of the present application, so how the electronic device implements the method in this embodiment of the present application will not be described in detail herein, and only those devices for implementing the method in this embodiment of the present application will be within the scope of the application.
In a specific implementation, the computer program 311 may implement any of the embodiments corresponding to fig. 1 when executed by a processor.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Embodiments of the present application also provide a computer program product comprising computer software instructions which, when run on a processing device, cause the processing device to perform a method, which may specifically comprise:
acquiring crank angle acceleration information of a target engine;
acquiring angular acceleration fluctuation information corresponding to the target time based on the crank angular acceleration information;
And controlling the target engine to operate according to the angular acceleration fluctuation information.
In some embodiments, the angular acceleration fluctuation information includes angular acceleration variance information;
The controlling the target engine operation based on the angular acceleration fluctuation information includes:
and controlling the target engine to work according to the angular acceleration variance information.
In some embodiments, controlling the target engine operation according to the angular acceleration fluctuation information includes:
And controlling the fuel injection phase to advance by a first preset angle under the condition that the angular acceleration fluctuation information is larger than a first preset threshold value and smaller than or equal to a second preset threshold value.
In some embodiments, the above method further comprises:
and controlling the intake phase to lag by a second preset angle under the condition that the angular acceleration fluctuation information is larger than the second preset threshold and smaller than or equal to a third preset threshold.
In some embodiments, the above method further comprises:
And when the angular acceleration fluctuation information is greater than the third preset threshold value, reducing the target air quantity entering the combustion chamber of the engine to reduce the excessive air coefficient corresponding to the target engine.
In some embodiments, the above method further comprises:
And when the angular acceleration fluctuation information is greater than the third preset threshold value and is smaller than or equal to a fourth preset threshold value, reducing the supercharging pressure to reduce the excessive air coefficient corresponding to the target engine.
In some embodiments, the above method further comprises:
and if the angular acceleration fluctuation information is greater than the fourth preset threshold value, reducing the preset opening degree of the throttle valve to reduce the excessive air coefficient corresponding to the target engine.
The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer readable storage media can be any available media that can be stored by a computer or data storage devices such as servers, data centers, etc. that contain an integration of one or more available media. Usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tape), optical media (e.g., DVD), or semiconductor media (e.g., solid State Disk (SSD)) or the like.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (4)
1. A method of controlling a compression ignition engine, comprising:
acquiring crank angle acceleration information of a target engine;
Acquiring angular acceleration fluctuation information corresponding to target time based on the crank angular acceleration information;
Controlling the target engine to work according to the angular acceleration fluctuation information, wherein the angular acceleration fluctuation information comprises angular acceleration variance information and comprises the following steps: controlling the target engine to work according to the angular acceleration fluctuation information:
controlling the fuel injection phase to advance by a first preset angle under the condition that the angular acceleration fluctuation information is larger than a first preset threshold value and smaller than or equal to a second preset threshold value;
controlling the intake phase to lag by a second preset angle under the condition that the angular acceleration fluctuation information is larger than the second preset threshold value and smaller than or equal to a third preset threshold value;
reducing a target air amount entering a combustion chamber of an engine to reduce an excess air ratio corresponding to the target engine, in the case where the angular acceleration fluctuation information is greater than the third preset threshold value;
Reducing boost pressure to reduce an excess air ratio corresponding to the target engine when the angular acceleration fluctuation information is greater than the third preset threshold and less than or equal to a fourth preset threshold;
And reducing the preset opening degree of a throttle valve to reduce the excessive air coefficient corresponding to the target engine under the condition that the angular acceleration fluctuation information is larger than the fourth preset threshold value.
2. A compression ignition engine control apparatus, comprising:
A first acquisition unit configured to acquire crank angle acceleration information of a target engine;
a second acquisition unit for acquiring angular acceleration fluctuation information corresponding to a target time based on the crank angular acceleration information;
the control unit is used for controlling the target engine to work according to the angular acceleration fluctuation information, wherein the angular acceleration fluctuation information comprises angular acceleration variance information, and the control unit is specifically used for controlling the target engine to work according to the angular acceleration fluctuation information: controlling the fuel injection phase to advance by a first preset angle under the condition that the angular acceleration fluctuation information is larger than a first preset threshold value and smaller than or equal to a second preset threshold value; controlling the intake phase to lag by a second preset angle under the condition that the angular acceleration fluctuation information is larger than the second preset threshold value and smaller than or equal to a third preset threshold value; reducing a target air amount entering a combustion chamber of an engine to reduce an excess air ratio corresponding to the target engine, in the case where the angular acceleration fluctuation information is greater than the third preset threshold value; reducing boost pressure to reduce an excess air ratio corresponding to the target engine when the angular acceleration fluctuation information is greater than the third preset threshold and less than or equal to a fourth preset threshold; and reducing the preset opening degree of a throttle valve to reduce the excessive air coefficient corresponding to the target engine under the condition that the angular acceleration fluctuation information is larger than the fourth preset threshold value.
3. An electronic device, comprising: a memory and a processor for implementing the steps of the compression ignition engine control method as claimed in claim 1 when executing a computer program stored in the memory.
4. A computer-readable storage medium having stored thereon a computer program, characterized by: the computer program, when executed by a processor, implements the compression ignition engine control method as claimed in claim 1.
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