CN112943467A - Injection correction method and system for engine exhaust temperature consistency and storage medium - Google Patents
Injection correction method and system for engine exhaust temperature consistency and storage medium Download PDFInfo
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- 238000002347 injection Methods 0.000 title claims abstract description 95
- 239000007924 injection Substances 0.000 title claims abstract description 95
- 238000012937 correction Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000000446 fuel Substances 0.000 claims abstract description 39
- 238000012935 Averaging Methods 0.000 claims abstract description 17
- 238000012163 sequencing technique Methods 0.000 claims abstract description 15
- 238000012795 verification Methods 0.000 claims abstract description 15
- 238000004590 computer program Methods 0.000 claims description 13
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- 238000012986 modification Methods 0.000 claims description 12
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- 238000010586 diagram Methods 0.000 description 13
- 238000012545 processing Methods 0.000 description 9
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- 239000007921 spray Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
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- 238000013500 data storage Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3005—Details not otherwise provided for
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
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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
- F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
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Abstract
The application provides a jet correction method system and a storage medium for engine exhaust temperature consistency, which are used for obtaining exhaust temperature of each cylinder of an engine and carrying out credibility verification to obtain a plurality of credible temperature values; sequencing a plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue; taking the middle value of the temperature value queue as a first reference value, and taking a temperature interval which floats up and down within a first threshold range on the basis of the first reference value as a first temperature reference interval; averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down on the basis of the second reference value and is within a second threshold range as a second temperature reference interval; and comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
Description
Technical Field
The application belongs to the technical field of engine control, and particularly relates to an injection correction method and system for engine exhaust temperature consistency and a storage medium.
Background
At present, because of a plurality of relevant parts of an engine, the consistency of the parts is problematic. For example, the oil injector, the supercharger and the oil injection pump all have influence on the nonuniformity of the exhaust temperature, if the vehicle is replaced by the new part, the uniformity of the exhaust temperature of each cylinder of the engine is influenced, and if the exhaust temperature of the engine is nonuniform, the electric control system of the engine and the service life of the engine are further influenced.
At present, the technical scheme that the temperature of the engine is controlled by aiming at the engine in the prior art so that the exhaust temperature of the engine is consistent is not provided.
Disclosure of Invention
The invention provides an injection correction method, an injection correction system and a storage medium for exhaust temperature consistency of an engine, and aims to solve the problem that exhaust temperatures of cylinders are inconsistent in the existing engine.
According to a first aspect of the embodiments of the present application, there is provided an injection correction method for engine exhaust temperature uniformity, specifically including the steps of:
acquiring exhaust temperature of each cylinder of the engine, and performing credibility verification to obtain a plurality of credible temperature values;
sequencing a plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue;
taking the middle value of the temperature value queue as a first reference value, and taking a temperature interval which floats up and down within a first threshold range on the basis of the first reference value as a first temperature reference interval;
averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down on the basis of the second reference value and is within a second threshold range as a second temperature reference interval;
and comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
In some embodiments of the present application, the exhaust temperature of each cylinder of the engine is obtained, and credibility verification is performed to obtain a plurality of credible temperature values, where the credibility verification specifically includes:
calibrating a temperature credible interval;
comparing the exhaust temperature of each cylinder with the temperature credible interval, and determining the exhaust temperature of the cylinder outside the temperature credible interval and the corresponding cylinder;
and deleting the exhaust temperature of the cylinder outside the temperature credible interval, or re-acquiring the exhaust temperature of the corresponding cylinder.
In some embodiments of the present application, taking the middle value of the temperature value queue as the first reference value specifically includes:
if the number of the temperature values in the temperature value queue is an odd number, taking the temperature value in the middle of the temperature value queue as a first reference value;
and if the number of the temperature values in the temperature value queue is an even number, averaging two temperature values in the middle of the temperature value queue, and taking the average value as a first reference value.
In some embodiments of the present application, the modifying the fuel injection power-up time of the corresponding cylinder specifically includes:
receiving a correction command for increasing/decreasing the fuel injection power-up time of the cylinder;
and carrying out time delay control according to the correction instruction, and sending out a fuel injection power-up instruction.
In some embodiments of the present application, the delay control is integral control, proportional integral control, or timer delay control.
In some embodiments of the present application, the first threshold is a value between 15 ° and 25 ° and the second threshold is a value between 3 ° and 7 °.
According to a second aspect of the embodiments of the present application, there is provided an injection correction system for engine exhaust temperature uniformity, specifically comprising:
a temperature acquisition module: the temperature control device is used for obtaining the exhaust temperature of each cylinder of the engine and carrying out credibility verification to obtain a plurality of credible temperature values;
a temperature value sequencing module: the temperature value queue is used for sequencing a plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue;
a first temperature reference module: the temperature control device is used for taking the middle value of the temperature value queue as a first reference value and taking a temperature interval which floats up and down within a first threshold range on the basis of the first reference value as a first temperature reference interval;
a second temperature reference module: the temperature control device is used for averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down in a second threshold range on the basis of the second reference value as a second temperature reference interval;
an injection correction module: and the temperature control unit is used for comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
In some embodiments of the present application, the spray modification module includes a delay control unit, the delay control unit is configured to:
receiving a correction command for increasing/decreasing the fuel injection power-up time of the cylinder;
and carrying out time delay control according to the correction instruction, and sending out a fuel injection power-up instruction.
According to a third aspect of the embodiments of the present application, there is provided an injection correction apparatus for engine exhaust temperature uniformity, including:
a memory: for storing executable instructions; and
and the processor is connected with the memory to execute the executable instructions so as to complete the injection correction method for the temperature exhaust consistency of the engine.
According to a fourth aspect of embodiments of the present application, there is provided a computer-readable storage medium having a computer program stored thereon; a computer program is executed by a processor to implement an injection correction method for engine exhaust temperature uniformity.
By adopting the injection correction method system and the storage medium for the exhaust temperature consistency of the engine in the embodiment of the application, the exhaust temperature of each cylinder of the engine is obtained, and credibility is verified to obtain a plurality of credible temperature values; sequencing a plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue; taking the middle value of the temperature value queue as a first reference value, and taking a temperature interval which floats up and down within a first threshold range on the basis of the first reference value as a first temperature reference interval; averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down on the basis of the second reference value and is within a second threshold range as a second temperature reference interval; and comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder. The single-cylinder correction is carried out on the fuel injection power-up time of each cylinder through the judgment and the processing of the exhaust temperature under the steady-state working condition, the running stability of the engine is improved, and the requirement of the exhaust temperature consistency of each cylinder of the engine is met.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic illustration of steps of an injection correction method for engine exhaust temperature uniformity according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a configuration of an injection correction system for engine exhaust temperature uniformity according to an embodiment of the present application;
a schematic structural diagram of an injection correction apparatus for engine exhaust temperature uniformity according to an embodiment of the present application is shown in fig. 3.
Detailed Description
In the process of implementing the present application, the inventor finds that there is a problem of consistency of parts due to a large number of related parts of the engine, and if the exhaust temperature of the engine is not uniform, the service life of an electronic control system of the engine and the service life of the engine are further affected.
Based on the injection correction method, the injection correction system and the storage medium for the exhaust temperature consistency of the engine, the exhaust temperature of each cylinder of the engine is obtained, and credibility is verified to obtain a plurality of credible temperature values; sequencing a plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue; taking the middle value of the temperature value queue as a first reference value, and taking a temperature interval which floats up and down within a first threshold range on the basis of the first reference value as a first temperature reference interval; averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down on the basis of the second reference value and is within a second threshold range as a second temperature reference interval; and comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
The single-cylinder correction is carried out on the fuel injection power-up time of each cylinder through the judgment and the processing of the exhaust temperature under the steady-state working condition, the running stability of the engine is improved, and the requirement of the exhaust temperature consistency of each cylinder of the engine is met.
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example 1
A schematic representation of the steps of an injection correction method for engine exhaust temperature uniformity according to an embodiment of the present application is shown in FIG. 1.
As shown in fig. 1, the injection correction method for the engine exhaust temperature consistency according to the embodiment of the present application specifically includes the following steps:
s101: and acquiring the exhaust temperature of each cylinder of the engine, and performing credibility verification to obtain a plurality of credible temperature values.
The credibility verification specifically comprises the following steps:
firstly, a temperature confidence interval is calibrated. And then comparing the exhaust temperature of each cylinder with the temperature credible interval, and determining the exhaust temperature of the cylinder outside the temperature credible interval and the corresponding cylinder. And finally, deleting the exhaust temperature of the cylinder outside the temperature credible interval, or re-acquiring the exhaust temperature of the corresponding cylinder.
S102: and sequencing the plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue.
S103: and taking the intermediate value of the temperature value queue as a first reference value, and taking a temperature interval which floats up and down within a first threshold range on the basis of the first reference value as a first temperature reference interval.
The method specifically includes the following two cases by taking the intermediate value of the temperature value queue as a first reference value:
if the number of the temperature values in the temperature value queue is an odd number, the temperature value in the middle of the temperature value queue is taken as a first reference value.
And (II) if the number of the temperature values in the temperature value queue is an even number, averaging two temperature values in the middle of the temperature value queue, and taking the average value as a first reference value.
S104: and averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down in a second threshold range on the basis of the second reference value as a second temperature reference interval.
S105: and comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
Wherein, revise the fuel injection power-up time of corresponding cylinder, specifically include:
first, receiving a correction command for increasing/decreasing the fuel injection power-up time of a cylinder; and then, according to the correction instruction, carrying out time delay control and sending out a fuel injection power-on instruction.
Specifically, the delay control is integral control, proportional-integral control or timer delay control. Because integral control, proportional-integral control or timer delay control are all existing controls, the specific control process is not described herein again.
Specifically, the first threshold and the second threshold are both calibrated values according to actual conditions. In the embodiment of the present application, the first threshold is a value between 15 ° and 25 °, and the second threshold is a value between 3 ° and 7 °.
According to the injection correction method for the exhaust temperature consistency of the engine, the specific correction process is as follows:
1) firstly, acquiring a real-time exhaust temperature value of each cylinder of the engine through each cylinder exhaust temperature sensor. For example: the engine comprises 5 cylinders and the temperature values obtained are respectively 410 ° (cylinder one), 405 ° (cylinder two), 415 ° (cylinder three), 408 ° (cylinder four) and 450 ° (cylinder five). Meanwhile, credibility is checked, and if the credibility is not met, the value is filtered.
2) Then, sorting the temperature values of the cylinders according to the size to obtain a temperature value queue: [405 ° (cylinder No. two), 408 ° (cylinder No. four), 410 ° (cylinder No. one), 415 ° (cylinder No. three), and 450 ° (cylinder No. five) ], and then taking the intermediate value of 410 ° (cylinder No. two) as a first reference value; then adding or subtracting a deviation, for example a deviation of 10 ° is nominal, on the basis of the intermediate value, a first temperature reference interval (400 ° -420 °);
3) comparing the temperature values of the five cylinders with the first temperature reference interval respectively to obtain results: if the temperature of the other cylinders is not within the interval of 450 degrees (cylinder five), averaging the temperature values (405 degrees, 408 degrees, 410 degrees and 415 degrees) of the cylinders, which all meet the first temperature reference interval, to obtain a second reference value 409.5 degrees, and adding or subtracting a deviation on the basis of the second reference value, for example, the deviation is marked as 4.5 degrees, so as to obtain a second temperature reference interval (405 degrees-414 degrees);
4) finally, the temperature values of the five cylinders are respectively compared with the second temperature reference interval, and the result is obtained: 415 degrees (third cylinder) and 450 degrees (fifth cylinder) do not meet the second temperature reference interval, at the moment, the fuel injection power-up time of the third cylinder and the fuel injection power-up time of the fifth cylinder need to be corrected, the temperature of the fuel injection power-up time is reduced in the second temperature reference interval, and finally the temperature of each cylinder of the engine meets the exhaust temperature consistency.
The application considers that during correction, because the exhaust temperature can not be added with electricity according to the injection to carry out feedback change in real time, and meanwhile frequent correction of power-on time due to inconsistent exhaust temperature is avoided.
The injection correction method for the exhaust temperature consistency of the engine in the embodiment of the application is adopted to obtain the exhaust temperature of each cylinder of the engine, and credibility verification is carried out to obtain a plurality of credible temperature values; sequencing a plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue; taking the middle value of the temperature value queue as a first reference value, and taking a temperature interval which floats up and down within a first threshold range on the basis of the first reference value as a first temperature reference interval; averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down on the basis of the second reference value and is within a second threshold range as a second temperature reference interval; and comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
The single-cylinder correction is carried out on the fuel injection power-up time of each cylinder through the judgment and the processing of the exhaust temperature under the steady-state working condition, the running stability of the engine is improved, and the requirement of the exhaust temperature consistency of each cylinder of the engine is met.
Example 2
For details that are not disclosed in the injection correction system for engine exhaust temperature uniformity of the present embodiment, please refer to specific implementation contents of the injection correction method for engine exhaust temperature uniformity in other embodiments.
A schematic structural diagram of an injection correction system for engine exhaust temperature uniformity according to an embodiment of the present application is shown in fig. 2.
As shown in fig. 2, the injection correction system for engine exhaust temperature consistency according to the embodiment of the present application specifically includes a temperature obtaining module 10, a temperature value sorting module 20, a first temperature reference module 30, a second temperature reference module 40, and an injection correction module 50.
In particular, the method comprises the following steps of,
the temperature acquisition module 10: the temperature control device is used for obtaining the exhaust temperature of each cylinder of the engine, and performing credibility verification to obtain a plurality of credible temperature values.
The credibility verification specifically comprises the following steps:
firstly, a temperature confidence interval is calibrated. And then comparing the exhaust temperature of each cylinder with the temperature credible interval, and determining the exhaust temperature of the cylinder outside the temperature credible interval and the corresponding cylinder. And finally, deleting the exhaust temperature of the cylinder outside the temperature credible interval, or re-acquiring the exhaust temperature of the corresponding cylinder.
Temperature value sequencing module 20: the temperature value queue is used for sequencing the plurality of credible temperature values in sequence according to the sizes of the plurality of credible temperature values to obtain the temperature value queue.
First temperature reference module 30: and the temperature interval is used as a first temperature reference interval, wherein the temperature interval is within a first threshold range of up-down floating on the basis of the first reference value.
The method specifically includes the following two cases by taking the intermediate value of the temperature value queue as a first reference value:
if the number of the temperature values in the temperature value queue is an odd number, the temperature value in the middle of the temperature value queue is taken as a first reference value.
And (II) if the number of the temperature values in the temperature value queue is an even number, averaging two temperature values in the middle of the temperature value queue, and taking the average value as a first reference value.
Second temperature reference module 40: the temperature control device is used for averaging the temperature values of all the cylinders in the temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down in a second threshold range on the basis of the second reference value as a second temperature reference interval.
The injection correction module 50: and the temperature control unit is used for comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
Wherein, revise the fuel injection power-up time of corresponding cylinder, specifically include:
first, receiving a correction command for increasing/decreasing the fuel injection power-up time of a cylinder; and then, according to the correction instruction, carrying out time delay control and sending out a fuel injection power-on instruction.
Specifically, the delay control is integral control, proportional-integral control or timer delay control. Because integral control, proportional-integral control or timer delay control are all existing controls, the specific control process is not described herein again.
Specifically, the first threshold and the second threshold are both calibrated values according to actual conditions. In the embodiment of the present application, the first threshold is a value between 15 ° and 25 °, and the second threshold is a value between 3 ° and 7 °.
According to the injection correction method for the exhaust temperature consistency of the engine, the specific correction process is as follows:
1) firstly, acquiring a real-time exhaust temperature value of each cylinder of the engine through each cylinder exhaust temperature sensor. For example: the engine comprises 5 cylinders and the temperature values obtained are respectively 410 ° (cylinder one), 405 ° (cylinder two), 415 ° (cylinder three), 408 ° (cylinder four) and 450 ° (cylinder five). Meanwhile, credibility is checked, and if the credibility is not met, the value is filtered.
2) Then, sorting the temperature values of the cylinders according to the size to obtain a temperature value queue: [405 ° (cylinder No. two), 408 ° (cylinder No. four), 410 ° (cylinder No. one), 415 ° (cylinder No. three), and 450 ° (cylinder No. five) ], and then taking the intermediate value of 410 ° (cylinder No. two) as a first reference value; then adding or subtracting a deviation, for example a deviation of 10 ° is nominal, on the basis of the intermediate value, a first temperature reference interval (400 ° -420 °);
3) comparing the temperature values of the five cylinders with the first temperature reference interval respectively to obtain results: if the temperature of the other cylinders is not within the interval of 450 degrees (cylinder five), averaging the temperature values (405 degrees, 408 degrees, 410 degrees and 415 degrees) of the cylinders, which all meet the first temperature reference interval, to obtain a second reference value 409.5 degrees, and adding or subtracting a deviation on the basis of the second reference value, for example, the deviation is marked as 4.5 degrees, so as to obtain a second temperature reference interval (405 degrees-414 degrees);
4) finally, the temperature values of the five cylinders are respectively compared with the second temperature reference interval, and the result is obtained: 415 degrees (third cylinder) and 450 degrees (fifth cylinder) do not meet the second temperature reference interval, at the moment, the fuel injection power-up time of the third cylinder and the fuel injection power-up time of the fifth cylinder need to be corrected, the temperature of the fuel injection power-up time is reduced in the second temperature reference interval, and finally the temperature of each cylinder of the engine meets the exhaust temperature consistency.
The application considers that during correction, because the exhaust temperature can not be added with electricity according to the injection to carry out feedback change in real time, and meanwhile frequent correction of power-on time due to inconsistent exhaust temperature is avoided.
By adopting the injection correction system for the exhaust temperature consistency of the engine in the embodiment of the application, the temperature acquisition module 10 acquires the exhaust temperature of each cylinder of the engine, and the credibility is verified to obtain a plurality of credible temperature values; the temperature value sequencing module 20 sequences a plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue; the first temperature reference module 30 takes the intermediate value of the temperature value queue as a first reference value, and takes a temperature interval within a first threshold range floating up and down on the basis of the first reference value as a first temperature reference interval; the second temperature reference module 40 averages the temperature values of the cylinders in the first temperature reference interval to obtain a second reference value, and takes the temperature interval which floats up and down on the basis of the second reference value and is within a second threshold range as a second temperature reference interval; the injection correction module 50 compares the second temperature reference interval with the temperature value of each cylinder, determines the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and corrects the fuel injection power-up time of the corresponding cylinder.
The single-cylinder correction is carried out on the fuel injection power-up time of each cylinder through the judgment and the processing of the exhaust temperature under the steady-state working condition, the running stability of the engine is improved, and the requirement of the exhaust temperature consistency of each cylinder of the engine is met.
Example 3
For details that are not disclosed in the injection correction apparatus for engine exhaust temperature consistency of the present embodiment, please refer to specific implementation contents of an injection correction method or system for engine exhaust temperature consistency in other embodiments.
A schematic structural diagram of an injection correction apparatus 400 for engine exhaust temperature uniformity according to an embodiment of the present application is shown in fig. 3.
As shown in fig. 3, the injection correction apparatus 400 for engine exhaust temperature uniformity includes:
the memory 402: for storing executable instructions; and
a processor 401 is coupled to the memory 402 to execute executable instructions to perform the motion vector prediction method.
Those skilled in the art will appreciate that the schematic diagram of fig. 3 is merely an example of the injection modification apparatus 400 and does not constitute a limitation of the injection modification apparatus 400, and may include more or less components than those shown, or combine certain components, or different components, for example, the injection modification apparatus 400 may also include input-output devices, network access devices, buses, and the like.
The Processor 401 (CPU) may be other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. The general purpose processor may be a microprocessor or the processor 401 may be any conventional processor or the like, the processor 401 being the control center of the spray correction device 400, with various interfaces and lines connecting the various parts of the overall spray correction device 400.
The modules integrated by the spray correction apparatus 400 may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by hardware related to computer readable instructions, which may be stored in a computer readable storage medium, and when the computer readable instructions are executed by a processor, the steps of the method embodiments may be implemented.
Example 4
The present embodiment provides a computer-readable storage medium having stored thereon a computer program; a computer program is executed by a processor to implement the injection correction method for engine exhaust temperature uniformity in other embodiments.
The injection correction equipment and the computer storage medium for the exhaust temperature consistency of the engine in the embodiment of the application acquire the exhaust temperature of each cylinder of the engine, and carry out credibility verification to obtain a plurality of credible temperature values; sequencing a plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue; taking the middle value of the temperature value queue as a first reference value, and taking a temperature interval which floats up and down within a first threshold range on the basis of the first reference value as a first temperature reference interval; averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down on the basis of the second reference value and is within a second threshold range as a second temperature reference interval; and comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
The single-cylinder correction is carried out on the fuel injection power-up time of each cylinder through the judgment and the processing of the exhaust temperature under the steady-state working condition, the running stability of the engine is improved, and the requirement of the exhaust temperature consistency of each cylinder of the engine is met.
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.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. An injection correction method for exhaust temperature consistency of an engine specifically comprises the following steps:
acquiring exhaust temperature of each cylinder of the engine, and performing credibility verification to obtain a plurality of credible temperature values;
sequencing the plurality of credible temperature values in sequence according to the sizes to obtain a temperature value queue;
taking the middle value of the temperature value queue as a first reference value, and taking a temperature interval which floats up and down within a first threshold range on the basis of the first reference value as a first temperature reference interval;
averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down on the basis of the second reference value and is within a second threshold range as a second temperature reference interval;
and comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
2. The injection correction method for the exhaust temperature consistency of the engine according to claim 1, characterized in that the exhaust temperature of each cylinder of the engine is obtained, and credibility verification is performed to obtain a plurality of credible temperature values, and the credibility verification specifically comprises:
calibrating a temperature credible interval;
comparing the exhaust temperature of each cylinder with a temperature credible interval, and determining the exhaust temperature of the cylinder outside the temperature credible interval and the corresponding cylinder;
and deleting the exhaust temperature of the cylinder outside the temperature credible interval, or re-acquiring the exhaust temperature of the corresponding cylinder.
3. The injection correction method for the engine exhaust temperature consistency according to claim 1, wherein the taking the intermediate value of the temperature value queue as a first reference value specifically comprises:
if the number of the temperature values in the temperature value queue is an odd number, taking the temperature value in the middle of the temperature value queue as a first reference value;
and if the number of the temperature values in the temperature value queue is an even number, averaging two temperature values in the middle of the temperature value queue, and taking the average value as a first reference value.
4. The injection correction method for engine exhaust temperature uniformity according to claim 1, wherein the correcting the fuel injection energization time of the corresponding cylinder specifically includes:
receiving a correction command for increasing/decreasing the fuel injection power-up time of the cylinder;
and carrying out time delay control according to the correction instruction, and sending a fuel injection power-up instruction.
5. The injection correction method for engine exhaust temperature uniformity according to claim 4, characterized in that the delay control is integral control, proportional-integral control, or timer delay control.
6. The injection correction method for engine exhaust temperature uniformity according to claim 1, characterized in that said first threshold value is a value between 15 ° and 25 ° and said second threshold value is a value between 3 ° and 7 °.
7. An injection correction system for engine exhaust temperature uniformity, comprising:
a temperature acquisition module: the temperature control device is used for obtaining the exhaust temperature of each cylinder of the engine and carrying out credibility verification to obtain a plurality of credible temperature values;
a temperature value sequencing module: the temperature value queue is used for sequentially sequencing the plurality of credible temperature values according to the sizes to obtain a temperature value queue;
a first temperature reference module: the temperature control device is used for taking the middle value of the temperature value queue as a first reference value and taking a temperature interval which floats up and down in a first threshold range on the basis of the first reference value as a first temperature reference interval;
a second temperature reference module: the temperature control device is used for averaging the temperature values of all the cylinders in the first temperature reference interval to obtain a second reference value, and taking the temperature interval which floats up and down in a second threshold range on the basis of the second reference value as a second temperature reference interval;
an injection correction module: and the temperature control unit is used for comparing the second temperature reference interval with the temperature value of each cylinder, determining the temperature value of the cylinder exceeding the temperature reference interval and the corresponding cylinder, and correcting the fuel injection power-up time of the corresponding cylinder.
8. The injection modification system for engine exhaust temperature uniformity of claim 1, wherein said injection modification module comprises a delay control unit configured to:
receiving a correction command for increasing/decreasing the fuel injection power-up time of the cylinder;
and carrying out time delay control according to the correction instruction, and sending a fuel injection power-up instruction.
9. An injection correction apparatus for engine exhaust temperature uniformity, characterized by comprising:
a memory: for storing executable instructions; and
a processor for interfacing with the memory to execute the executable instructions to perform the injection correction method for engine exhaust temperature uniformity of any of claims 1-7.
10. A computer-readable storage medium, having stored thereon a computer program; a computer program executed by a processor to implement the injection correction method for engine exhaust temperature uniformity as claimed in any one of claims 1 to 7.
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| CN202110163455.5A CN112943467A (en) | 2021-02-05 | 2021-02-05 | Injection correction method and system for engine exhaust temperature consistency and storage medium |
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Application publication date: 20210611 |