CN110284980B - Oil mass correction method and device based on main injection angle - Google Patents
Oil mass correction method and device based on main injection angle Download PDFInfo
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- CN110284980B CN110284980B CN201910579827.5A CN201910579827A CN110284980B CN 110284980 B CN110284980 B CN 110284980B CN 201910579827 A CN201910579827 A CN 201910579827A CN 110284980 B CN110284980 B CN 110284980B
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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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
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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
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
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Abstract
The invention provides an oil mass correction method and device based on a main injection angle, wherein a reference main injection advance angle is determined according to the current engine speed and the current required internal torque, an oil mass correction coefficient is obtained according to the difference value between the reference main injection advance angle and a set main injection advance angle and the current engine speed, and finally, the oil mass correction coefficient is utilized to correct a required oil mass basic value, so that the final required oil injection mass meets the dynamic requirement of an engine, different conversion MAP (MAP) does not need to be selected and switched when the engine control modes are switched, the oil mass correction method and device are suitable for multiple engine control modes, the functional applicability is improved, and the software calibration workload is reduced.
Description
Technical Field
The invention relates to the technical field of automobile electric control, in particular to an oil mass correction method and device based on a main injection angle.
Background
The engine control mode comprises a plurality of control modes such as SCR heating, DPF active regeneration, DPF passive regeneration, a normal mode and the like.
In the prior art, different torque oil quantities are calibrated to convert into MAP under different engine control modes. When the engine control mode is switched, different conversion MAP is selected to be switched to meet the power requirement of the engine.
However, different torque oil amount conversion MAP is calibrated under different engine control modes, and the calibration workload is large. Moreover, when a control mode is newly added, a conversion MAP is required to be newly added at the same time, and the functional applicability is poor.
Disclosure of Invention
In view of this, the invention provides an oil amount correction method and an oil amount correction device based on a main injection angle, which are suitable for multiple engine control modes, improve the functional applicability and reduce the software calibration workload.
In order to achieve the above purpose, the invention provides the following specific technical scheme:
a main injection angle-based oil amount correction method, comprising:
transferring pre-calibrated torque-oil mass to convert MAP, and determining a base value of the required oil mass according to the current engine speed and the current required internal torque;
calling a pre-calibrated reference main injection angle MAP, and determining a reference main injection advance angle according to the current engine speed and the current required internal torque;
calculating an angular deviation between the reference main injection advance angle and a set main injection advance angle;
calling a pre-calibrated oil quantity correction coefficient MAP, and determining an oil quantity correction coefficient according to the current engine speed and the angle deviation;
and correcting the basic value of the required oil quantity by using the oil quantity correction coefficient to obtain the final required oil quantity.
Optionally, the method further includes:
acquiring the current opening degree of an accelerator pedal, the current engine temperature and the current air inlet pressure;
calling a pre-calibrated demand internal torque basis MAP, and determining a demand internal torque basis value according to the current engine speed and the current accelerator pedal opening;
and protecting and limiting the engine according to the current engine speed, the current engine temperature and the current air inlet pressure, and correcting the basic value of the required internal torque to obtain the current required internal torque.
Optionally, the invoking of the pre-calibrated torque-oil amount conversion MAP and the determining of the required oil amount base value according to the current engine speed and the current required internal torque include:
and searching the required oil quantity basic value corresponding to the current engine speed and the current required internal torque in the torque-oil quantity conversion MAP, wherein the torque-oil quantity conversion MAP is a corresponding relation between different engine speed-required internal torque data pairs calibrated in a normal mode in advance and the required oil quantity basic value.
Optionally, the invoking a pre-calibrated reference main injection angle MAP and determining the reference main injection advance angle according to the current engine speed and the current required internal torque include:
the reference main injection angle of advance corresponding to the current engine speed and the current required internal torque is retrieved in the reference main injection angle MAP, which is a correspondence between different engine speed-required internal torque data pairs previously calibrated in the normal mode and the reference main injection angle of advance.
Optionally, the method further includes:
calling a main injection advance angle MAP corresponding to the current engine control mode, and determining and setting a basic value of the main injection advance angle according to the current engine speed and the current required internal torque;
and correcting the set main injection advance angle basic value according to the current environmental pressure, the current fuel temperature and the current rail pressure to obtain the set main injection advance angle.
Optionally, the step of correcting the basic value of the required oil amount by using the oil amount correction coefficient to obtain a final required oil amount includes:
and calculating the product of the oil quantity correction coefficient and the oil quantity demand basic value to obtain the final oil quantity demand.
An oil amount correction device based on a main injection angle, comprising:
the basic oil quantity determining unit is used for calling a pre-calibrated torque-oil quantity conversion MAP and determining a required oil quantity basic value according to the current engine rotating speed and the current required internal torque;
the reference main injection angle determining unit is used for calling a pre-calibrated reference main injection angle MAP and determining a reference main injection advance angle according to the current engine speed and the current required internal torque;
an angle deviation calculation unit for calculating an angle deviation between the reference main injection advance angle and a set main injection advance angle;
the correction coefficient determining unit is used for calling a pre-calibrated oil quantity correction coefficient MAP and determining an oil quantity correction coefficient according to the current engine speed and the angle deviation;
and the oil quantity correction unit is used for correcting the basic value of the required oil quantity by utilizing the oil quantity correction coefficient to obtain the final required oil quantity.
Optionally, the apparatus further comprises:
the demand internal torque determining unit is used for acquiring the current opening degree of an accelerator pedal, the current engine temperature and the current air inlet pressure; calling a pre-calibrated demand internal torque basis MAP, and determining a demand internal torque basis value according to the current engine speed and the current accelerator pedal opening; and protecting and limiting the engine according to the current engine speed, the current engine temperature and the current air inlet pressure, and correcting the basic value of the required internal torque to obtain the current required internal torque.
Optionally, the base oil amount determining unit is specifically configured to retrieve the oil amount demand base value corresponding to the current engine speed and the current required internal torque in the torque-oil amount conversion MAP, where the torque-oil amount conversion MAP is a correspondence relationship between different pairs of engine speed-required internal torque data calibrated in a normal mode in advance and the oil amount demand base value.
Optionally, the reference main injection angle determining unit is specifically configured to retrieve the reference main injection angle advance corresponding to the current engine speed and the current required internal torque in the reference main injection angle MAP, where the reference main injection angle MAP is a corresponding relationship between different engine speed-required internal torque data pairs calibrated in the normal mode in advance and the reference main injection angle advance.
Optionally, the apparatus further comprises:
the main injection angle setting calculation unit is used for calling a main injection advance angle MAP corresponding to the current engine control mode and determining a basic value of the main injection advance angle according to the current engine speed and the current required internal torque; and correcting the set main injection advance angle basic value according to the current environmental pressure, the current fuel temperature and the current rail pressure to obtain the set main injection advance angle.
Optionally, the oil amount correction unit is specifically configured to calculate a product of the oil amount correction coefficient and the oil demand base value to obtain the final oil demand.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses an oil quantity correction method based on a main injection angle, which is characterized in that a reference main injection advance angle is determined according to the current engine speed and the current required internal torque, an oil quantity correction coefficient is obtained according to the difference value between the reference main injection advance angle and a set main injection advance angle and the current engine speed, and finally, a required oil quantity basic value is corrected by using the oil quantity correction coefficient, so that the final required oil injection quantity meets the dynamic requirement of an engine, different conversion MAP (MAP) is not required to be selected and switched when the engine control modes are switched, the method is suitable for a plurality of engine control modes, the functional applicability is improved, and the software calibration workload is reduced.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for correcting an oil amount based on a main injection angle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an oil amount correction device based on a main injection angle according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The inventor of the application finds out through research that: under the engine control modes of DPF regeneration and the like, the main injection is moved backwards by an advanced angle so as to achieve the purpose of engine control such as temperature increase and the like. Along with the backward movement of the main injection advance angle, the combustion efficiency is reduced, and the dynamic property is reduced under the same fuel injection quantity.
On the basis, the embodiment discloses an oil amount correction method based on a main injection angle, and aims to meet the dynamic requirement of an engine by correcting the fuel injection amount. Referring to fig. 1, the oil amount correction method based on the main injection angle disclosed in the present embodiment specifically includes the following steps:
s101: transferring pre-calibrated torque-oil mass to convert MAP, and determining a base value of the required oil mass according to the current engine speed and the current required internal torque;
the torque-oil amount conversion MAP is a correspondence relationship between different engine speed-demand torque data pairs calibrated in the normal mode in advance and a demand oil amount base value.
First, it is necessary to determine the current required internal torque, and then, the required oil amount base value corresponding to the current engine speed and the current required internal torque is retrieved in the torque-oil amount conversion MAP.
Specifically, the method for determining the torque in the current demand is as follows:
acquiring the current opening degree of an accelerator pedal, the current engine temperature and the current air inlet pressure;
calling a pre-calibrated demand internal torque basis MAP, and determining a demand internal torque basis value according to the current engine speed and the current accelerator pedal opening;
and protecting and limiting the engine according to the current engine speed, the current engine temperature and the current air inlet pressure, and correcting the basic value of the required internal torque to obtain the current required internal torque.
It should be noted that the demand internal torque base MAP is calibrated in the normal mode in advance, and the corresponding relation between the data pairs of different engine speeds and the opening degrees of the accelerator pedals and the demand internal torque base value.
And each engine rotating speed corresponds to a maximum required internal torque value, and if the required internal torque basic value determined according to the current engine rotating speed and the current accelerator pedal opening is larger than the maximum required internal torque corresponding to the current engine rotating speed, the required internal torque basic value is corrected, so that the required internal torque is not larger than the maximum required internal torque value corresponding to the current engine rotating speed.
When the current engine temperature is too high, the base value of the in-demand torque needs to be corrected, such as to lower the in-demand torque.
When the current intake pressure is too low, the required internal torque base value needs to be corrected, such as to lower the required internal torque.
It should be further noted that the base torque value in the demand can be corrected according to other working condition parameters according to actual needs.
The correction logic is calibrated in advance, so that the torque in the demand is more suitable for the current working condition, the stability and the safety of the operation of the engine are ensured, and the exhaust meets the standard.
S102: calling a pre-calibrated reference main injection angle MAP, and determining a reference main injection advance angle according to the current engine speed and the current required internal torque;
the reference main injection angle MAP is a correspondence between different engine speed-required torque data pairs calibrated in advance in the normal mode and the reference main injection advance angle.
The reference main injection advance angle corresponding to the current engine speed and the current required in-torque is retrieved in the reference main injection angle MAP.
S103: calculating an angular deviation between the reference main injection advance angle and a set main injection advance angle;
firstly, working condition parameters such as current environmental pressure, current fuel temperature and current rail pressure are obtained.
Then, calling a main injection advance angle MAP corresponding to the current engine control mode, and determining and setting a main injection advance angle basic value according to the current engine speed and the current required internal torque, wherein one main injection advance angle MAP is calibrated in advance under engine control modes such as an SCR heating mode, a DPF active regeneration mode, a DPF passive regeneration mode and a normal mode, and the like, and the main injection advance angles MAP corresponding to different engine control modes represents the corresponding relation between different engine speed and required internal torque data pairs and the set main injection advance angle basic value.
And finally, correcting the set main injection advance angle basic value according to the current environmental pressure, the current fuel temperature and the current rail pressure to obtain the set main injection advance angle.
Specifically, the engine speed-ambient pressure-main injection advance angle MAP is called, and the set main injection advance angle basic value is corrected according to the current engine speed and the current ambient pressure.
And calling the engine speed-fuel temperature-main injection advance angle MAP, and correcting the set main injection advance angle basic value according to the current engine speed and the current fuel temperature.
And calling the engine speed-rail pressure-main injection advance angle MAP, and correcting the set main injection advance angle basic value according to the current engine speed and the current rail pressure.
It should be noted that, according to actual needs, the set main injection advance angle basic value may also be corrected according to other working condition parameters, the above correction logic is calibrated in advance, and the set main injection advance angle basic value is corrected through the above various working condition parameters, so that the set main injection advance angle is more suitable for the current working condition, and the fuel combustion efficiency is improved.
S104: calling a pre-calibrated oil quantity correction coefficient MAP, and determining an oil quantity correction coefficient according to the current engine speed and the angle deviation;
it should be noted that the oil amount correction coefficient MAP satisfies the correction requirement for the fuel injection amount in any engine control mode.
The oil mass correction coefficient MAP is calibrated in advance and represents the corresponding relation between different engine speed-angle deviation data pairs and the oil mass correction coefficient.
An oil amount correction coefficient corresponding to the current engine speed and the angular deviation is retrieved in the oil amount correction MAP.
S105: and correcting the basic value of the required oil quantity by using the oil quantity correction coefficient to obtain the final required oil quantity.
Specifically, the product of the oil quantity correction coefficient and the oil quantity demand basic value is calculated to obtain the final oil quantity demand.
According to the oil quantity correction method based on the main injection angle, the reference main injection advance angle is determined according to the current engine speed and the current required internal torque, the oil quantity correction coefficient is obtained according to the difference value between the reference main injection advance angle and the set main injection advance angle and the current engine speed, and finally the oil quantity basic value is corrected by the oil quantity correction coefficient, so that the final required oil injection quantity meets the dynamic requirement of the engine, different conversion MAP does not need to be selected and switched when the engine control modes are switched, the method is suitable for multiple engine control modes, the functional applicability is improved, and the software calibration workload is reduced.
Based on the above-mentioned oil amount correction method based on the main injection angle disclosed in the embodiment, the present embodiment correspondingly discloses an oil amount correction device based on the main injection angle, please refer to fig. 2, which specifically includes:
a basic oil quantity determining unit 201, configured to call a pre-calibrated torque-oil quantity conversion MAP, and determine a required oil quantity basic value according to a current engine speed and a current required internal torque;
a reference main injection angle determination unit 202 for calling a pre-calibrated reference main injection angle MAP and determining a reference main injection advance angle according to the current engine speed and the current required internal torque;
an angle deviation calculation unit 203 for calculating an angle deviation between the reference main injection advance angle and a set main injection advance angle;
a correction coefficient determining unit 204, configured to invoke a pre-calibrated oil amount correction coefficient MAP, and determine an oil amount correction coefficient according to the current engine speed and the angle deviation;
and an oil amount correction unit 205, configured to correct the oil amount demand base value by using the oil amount correction coefficient, so as to obtain a final oil demand.
Optionally, the apparatus further comprises:
the demand internal torque determining unit is used for acquiring the current opening degree of an accelerator pedal, the current engine temperature and the current air inlet pressure; calling a pre-calibrated demand internal torque basis MAP, and determining a demand internal torque basis value according to the current engine speed and the current accelerator pedal opening; and protecting and limiting the engine according to the current engine speed, the current engine temperature and the current air inlet pressure, and correcting the basic value of the required internal torque to obtain the current required internal torque.
Optionally, the base oil amount determining unit 201 is specifically configured to retrieve the oil amount demand base value corresponding to the current engine speed and the current required internal torque in the torque-oil amount conversion MAP, where the torque-oil amount conversion MAP is a correspondence relationship between different pairs of engine speed-required internal torque data calibrated in a normal mode in advance and the oil amount demand base value.
Optionally, the reference main injection angle determining unit 202 is specifically configured to retrieve the reference main injection angle advance corresponding to the current engine speed and the current required internal torque in the reference main injection angle MAP, where the reference main injection angle MAP is a corresponding relationship between different engine speed-required internal torque data pairs calibrated in the normal mode in advance and the reference main injection angle advance.
Optionally, the apparatus further comprises:
the main injection angle setting calculation unit is used for calling a main injection advance angle MAP corresponding to the current engine control mode and determining a basic value of the main injection advance angle according to the current engine speed and the current required internal torque; and correcting the set main injection advance angle basic value according to the current environmental pressure, the current fuel temperature and the current rail pressure to obtain the set main injection advance angle.
Optionally, the oil amount correction unit 205 is specifically configured to calculate a product of the oil amount correction coefficient and the oil demand base value to obtain the final oil demand.
According to the oil quantity correction device based on the main injection angle, the reference main injection advance angle is determined according to the current engine speed and the current required internal torque, the oil quantity correction coefficient is obtained according to the difference value between the reference main injection advance angle and the set main injection advance angle and the current engine speed, and finally the oil quantity basic value is corrected by the oil quantity correction coefficient, so that the final required oil injection quantity meets the dynamic requirement of the engine, different conversion MAP (MAP) does not need to be selected and switched when the engine control modes are switched, the oil quantity correction device based on the main injection angle is suitable for multiple engine control modes, the functional applicability is improved, and the software calibration workload is reduced.
The main injection angle-based oil amount correction device includes a processor and a memory, the base oil amount determination unit, the reference main injection angle determination unit, the angle deviation calculation unit, the correction coefficient determination unit, the oil amount correction unit, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and the oil quantity correction efficiency is improved by adjusting kernel parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a storage medium having a program stored thereon, the program implementing the main injection angle-based oil amount correction method when being executed by a processor.
An embodiment of the present invention provides a processor, where the processor is configured to run a program, where the program runs to execute the main injection angle-based oil amount correction method.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor executes the program and realizes the following steps:
transferring pre-calibrated torque-oil mass to convert MAP, and determining a base value of the required oil mass according to the current engine speed and the current required internal torque;
calling a pre-calibrated reference main injection angle MAP, and determining a reference main injection advance angle according to the current engine speed and the current required internal torque;
calculating an angular deviation between the reference main injection advance angle and a set main injection advance angle;
calling a pre-calibrated oil quantity correction coefficient MAP, and determining an oil quantity correction coefficient according to the current engine speed and the angle deviation;
and correcting the basic value of the required oil quantity by using the oil quantity correction coefficient to obtain the final required oil quantity.
Further, the method further comprises:
acquiring the current opening degree of an accelerator pedal, the current engine temperature and the current air inlet pressure;
calling a pre-calibrated demand internal torque basis MAP, and determining a demand internal torque basis value according to the current engine speed and the current accelerator pedal opening;
and protecting and limiting the engine according to the current engine speed, the current engine temperature and the current air inlet pressure, and correcting the basic value of the required internal torque to obtain the current required internal torque.
Further, the step of calling a pre-calibrated torque-oil amount conversion MAP and determining a required oil amount base value according to the current engine speed and the current required internal torque includes:
and searching the required oil quantity basic value corresponding to the current engine speed and the current required internal torque in the torque-oil quantity conversion MAP, wherein the torque-oil quantity conversion MAP is a corresponding relation between different engine speed-required internal torque data pairs calibrated in a normal mode in advance and the required oil quantity basic value.
Further, the calling a pre-calibrated reference main injection angle MAP and determining a reference main injection advance angle according to the current engine speed and the current required internal torque comprises:
the reference main injection angle of advance corresponding to the current engine speed and the current required internal torque is retrieved in the reference main injection angle MAP, which is a correspondence between different engine speed-required internal torque data pairs previously calibrated in the normal mode and the reference main injection angle of advance.
Further, the method further comprises:
calling a main injection advance angle MAP corresponding to the current engine control mode, and determining and setting a basic value of the main injection advance angle according to the current engine speed and the current required internal torque;
and correcting the set main injection advance angle basic value according to the current environmental pressure, the current fuel temperature and the current rail pressure to obtain the set main injection advance angle.
Further, the step of correcting the basic value of the required oil amount by using the oil amount correction coefficient to obtain a final required oil amount includes:
and calculating the product of the oil quantity correction coefficient and the oil quantity demand basic value to obtain the final oil quantity demand.
The device herein may be an MCU or the like.
The present application further provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device:
transferring pre-calibrated torque-oil mass to convert MAP, and determining a base value of the required oil mass according to the current engine speed and the current required internal torque;
calling a pre-calibrated reference main injection angle MAP, and determining a reference main injection advance angle according to the current engine speed and the current required internal torque;
calculating an angular deviation between the reference main injection advance angle and a set main injection advance angle;
calling a pre-calibrated oil quantity correction coefficient MAP, and determining an oil quantity correction coefficient according to the current engine speed and the angle deviation;
and correcting the basic value of the required oil quantity by using the oil quantity correction coefficient to obtain the final required oil quantity.
Further, the method further comprises:
acquiring the current opening degree of an accelerator pedal, the current engine temperature and the current air inlet pressure;
calling a pre-calibrated demand internal torque basis MAP, and determining a demand internal torque basis value according to the current engine speed and the current accelerator pedal opening;
and protecting and limiting the engine according to the current engine speed, the current engine temperature and the current air inlet pressure, and correcting the basic value of the required internal torque to obtain the current required internal torque.
Further, the step of calling a pre-calibrated torque-oil amount conversion MAP and determining a required oil amount base value according to the current engine speed and the current required internal torque includes:
and searching the required oil quantity basic value corresponding to the current engine speed and the current required internal torque in the torque-oil quantity conversion MAP, wherein the torque-oil quantity conversion MAP is a corresponding relation between different engine speed-required internal torque data pairs calibrated in a normal mode in advance and the required oil quantity basic value.
Further, the calling a pre-calibrated reference main injection angle MAP and determining a reference main injection advance angle according to the current engine speed and the current required internal torque comprises:
the reference main injection angle of advance corresponding to the current engine speed and the current required internal torque is retrieved in the reference main injection angle MAP, which is a correspondence between different engine speed-required internal torque data pairs previously calibrated in the normal mode and the reference main injection angle of advance.
Further, the method further comprises:
calling a main injection advance angle MAP corresponding to the current engine control mode, and determining and setting a basic value of the main injection advance angle according to the current engine speed and the current required internal torque;
and correcting the set main injection advance angle basic value according to the current environmental pressure, the current fuel temperature and the current rail pressure to obtain the set main injection advance angle.
Further, the step of correcting the basic value of the required oil amount by using the oil amount correction coefficient to obtain a final required oil amount includes:
and calculating the product of the oil quantity correction coefficient and the oil quantity demand basic value to obtain the final oil quantity demand.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 processor, 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.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, 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 above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (9)
1. A main injection angle-based oil amount correction method, characterized by comprising:
transferring pre-calibrated torque-oil mass to convert MAP, and determining a base value of the required oil mass according to the current engine speed and the current required internal torque;
calling a pre-calibrated reference main injection angle MAP, and determining a reference main injection advance angle according to the current engine speed and the current required internal torque;
calculating an angular deviation between the reference main injection advance angle and a set main injection advance angle;
calling a pre-calibrated oil quantity correction coefficient MAP, and determining an oil quantity correction coefficient according to the current engine speed and the angle deviation;
correcting the basic value of the required oil quantity by using the oil quantity correction coefficient to obtain the final required oil quantity;
the method further comprises the following steps:
calling a main injection advance angle MAP corresponding to the current engine control mode, and determining and setting a basic value of the main injection advance angle according to the current engine speed and the current required internal torque;
and correcting the set main injection advance angle basic value according to the current environmental pressure, the current fuel temperature and the current rail pressure to obtain the set main injection advance angle.
2. The method of claim 1, further comprising:
acquiring the current opening degree of an accelerator pedal, the current engine temperature and the current air inlet pressure;
calling a pre-calibrated demand internal torque basis MAP, and determining a demand internal torque basis value according to the current engine speed and the current accelerator pedal opening;
and protecting and limiting the engine according to the current engine speed, the current engine temperature and the current air inlet pressure, and correcting the basic value of the required internal torque to obtain the current required internal torque.
3. The method of claim 1, wherein said invoking a pre-calibrated torque-to-oil MAP to determine a base value for oil demand based on a current engine speed and a current requested internal torque comprises:
and searching the required oil quantity basic value corresponding to the current engine speed and the current required internal torque in the torque-oil quantity conversion MAP, wherein the torque-oil quantity conversion MAP is a corresponding relation between different engine speed-required internal torque data pairs calibrated in a normal mode in advance and the required oil quantity basic value.
4. The method of claim 1, wherein invoking a pre-calibrated reference main injection angle MAP, determining a reference main injection advance angle as a function of a current engine speed and a current requested internal torque, comprises:
the reference main injection angle of advance corresponding to the current engine speed and the current required internal torque is retrieved in the reference main injection angle MAP, which is a correspondence between different engine speed-required internal torque data pairs previously calibrated in the normal mode and the reference main injection angle of advance.
5. The method of claim 1, wherein said modifying said base fuel demand value with said fuel quantity modification factor to obtain a final fuel demand comprises:
and calculating the product of the oil quantity correction coefficient and the oil quantity demand basic value to obtain the final oil quantity demand.
6. An oil amount correction device based on a main injection angle, characterized by comprising:
the basic oil quantity determining unit is used for calling a pre-calibrated torque-oil quantity conversion MAP and determining a required oil quantity basic value according to the current engine rotating speed and the current required internal torque;
the reference main injection angle determining unit is used for calling a pre-calibrated reference main injection angle MAP and determining a reference main injection advance angle according to the current engine speed and the current required internal torque;
an angle deviation calculation unit for calculating an angle deviation between the reference main injection advance angle and a set main injection advance angle;
the correction coefficient determining unit is used for calling a pre-calibrated oil quantity correction coefficient MAP and determining an oil quantity correction coefficient according to the current engine speed and the angle deviation;
the oil quantity correction unit is used for correcting the basic value of the required oil quantity by using the oil quantity correction coefficient to obtain the final required oil quantity;
the main injection angle setting calculation unit is used for calling a main injection advance angle MAP corresponding to the current engine control mode and determining a basic value of the main injection advance angle according to the current engine speed and the current required internal torque; and correcting the set main injection advance angle basic value according to the current environmental pressure, the current fuel temperature and the current rail pressure to obtain the set main injection advance angle.
7. The apparatus of claim 6, further comprising:
the demand internal torque determining unit is used for acquiring the current opening degree of an accelerator pedal, the current engine temperature and the current air inlet pressure; calling a pre-calibrated demand internal torque basis MAP, and determining a demand internal torque basis value according to the current engine speed and the current accelerator pedal opening; and protecting and limiting the engine according to the current engine speed, the current engine temperature and the current air inlet pressure, and correcting the basic value of the required internal torque to obtain the current required internal torque.
8. The apparatus according to claim 6, wherein the base oil amount determining unit is specifically configured to retrieve the oil amount demand base value corresponding to a current engine speed and a current in-demand torque in the torque-oil amount conversion MAP, which is a correspondence relationship between different engine speed-in-demand torque data pairs previously calibrated in the normal mode and the oil amount demand base value.
9. The arrangement according to claim 6, characterized in that the reference main injection angle determination unit is specifically adapted to retrieve the reference main injection angle for which the current engine speed and the current required internal torque correspond in the reference main injection angle MAP, which is a correspondence between different engine speed-required internal torque data pairs previously calibrated in the normal mode and the reference main injection angle.
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