CN113700566A - Parameter correction method and device for engine - Google Patents
Parameter correction method and device for engine Download PDFInfo
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- CN113700566A CN113700566A CN202111104494.4A CN202111104494A CN113700566A CN 113700566 A CN113700566 A CN 113700566A CN 202111104494 A CN202111104494 A CN 202111104494A CN 113700566 A CN113700566 A CN 113700566A
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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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/401—Controlling injection timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- 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
- F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention provides a parameter correction method and a parameter correction device for an engine, wherein the method comprises the following steps: acquiring current target parameters of an engine, wherein the target parameters comprise at least one of an oil injection advance angle, an oil injection quantity and a urea injection quantity; determining a first correction coefficient corresponding to the fuel quality of the engine; acquiring a second correction coefficient corresponding to the target parameter, wherein the second correction coefficient is determined according to the rotating speed of the engine, the volume of a combustion chamber, the compression clearance, the cylinder sleeve protrusion, the fuel injector protrusion, the valve protrusion and the torque; and correcting the target parameter according to the first correction coefficient and the second correction coefficient. The method of the invention corrects the target parameters such as the fuel injection advance angle, the fuel injection quantity, the urea injection quantity and the like, thereby reducing the discrete error of the engine, improving the emission consistency and the performance consistency of the engine and avoiding the residue discharged by the engine from exceeding the calibration range.
Description
Technical Field
The invention relates to an engine technology, in particular to a parameter correction method and device of an engine.
Background
When the fuel engine is operated, the exhaust gas and other residues need to be discharged, but the discharge amount of the discharged residues needs to be controlled within a calibration range.
In the production process of the engine, due to discrete errors such as machining errors, dimension chain errors, calibration errors and the like, the emission consistency and the performance consistency of the engine are poor.
Disclosure of Invention
The invention provides a parameter correction method and device of an engine, which are used for solving the problems of poor emission consistency and poor performance consistency of the engine.
In one aspect, the present invention provides a parameter correction method for an engine, including:
acquiring current target parameters of an engine, wherein the target parameters comprise at least one of an oil injection advance angle, an oil injection quantity and a urea injection quantity;
determining a first correction coefficient corresponding to the fuel quality of the engine;
acquiring a second correction coefficient corresponding to the target parameter, wherein the second correction coefficient is determined according to the rotating speed of the engine, the volume of a combustion chamber, the compression clearance, the cylinder sleeve protrusion, the fuel injector protrusion, the valve protrusion and the torque;
and correcting the target parameter according to the first correction coefficient and the second correction coefficient.
In one embodiment, the target parameter includes an oil injection advance angle, and the step of correcting the target parameter according to the first correction coefficient and the second correction coefficient includes:
acquiring top dead center deviation of a piston of the engine, and determining a correction value according to the top dead center deviation;
correcting the correction value according to the second correction coefficient;
and correcting the oil injection advance angle according to the corrected correction value and the first correction coefficient.
In one embodiment, the target parameter includes an urea injection amount, and the step of correcting the target parameter according to the first correction coefficient and the second correction coefficient includes:
obtaining the urea quality coefficient of the urea solution;
and correcting the urea injection quantity according to the urea quality coefficient, the first correction coefficient and the second correction coefficient.
In one embodiment, the step of determining a first correction factor corresponding to the fuel quality of the engine comprises:
acquiring the content of a preset component of fuel oil of the engine, wherein the content of the preset component comprises at least one of sulfur content, carbon content and hydrogen content;
and determining a first correction coefficient corresponding to the fuel quality according to the content of the preset component.
In one embodiment, the first correction coefficient is obtained by calculating the content of a preset component of fuel by a calculation model of the engine, and the second correction coefficient is obtained by calculating the rotation speed, the torque, the combustion chamber volume, the compression clearance, the cylinder liner protrusion amount, the fuel injector protrusion amount and the valve protrusion amount of the engine by the calculation model, wherein the content of the preset component comprises at least one of sulfur content, carbon content and hydrogen content.
In an embodiment, the step of obtaining the second correction coefficient corresponding to the target parameter includes:
acquiring the rotating speed, the compression clearance, the torque and the combustion chamber volume of the engine;
acquiring the cylinder sleeve protrusion amount, the oil injector protrusion amount and the valve protrusion amount of the engine at the rotating speed;
and determining a second correction coefficient corresponding to the target parameter according to the rotating speed, the torque, the volume of the combustion chamber, the cylinder sleeve protrusion amount, the fuel injector protrusion amount and the valve protrusion amount, wherein the second correction coefficient comprises at least one of an advance angle correction coefficient, a fuel injection amount correction coefficient and a urea injection amount correction coefficient.
In another aspect, the present invention also provides an engine comprising:
the acquisition module is used for acquiring the current target parameters of the engine, wherein the target parameters comprise at least one of an oil injection advance angle, an oil injection quantity and a urea injection quantity;
the determining module is used for determining a first correction coefficient corresponding to the fuel quality of the engine;
acquiring a second correction coefficient corresponding to the target parameter, wherein the second correction coefficient is determined according to the rotating speed of the engine, the volume of a combustion chamber, the compression clearance, the cylinder sleeve protrusion, the fuel injector protrusion, the valve protrusion and the torque;
and correcting the target parameter according to the first correction coefficient and the second correction coefficient.
In another aspect, the present invention also provides an engine comprising: a memory and a processor;
the memory stores computer-executable instructions;
the processor executes the computer-executable instructions stored by the memory to cause the processor to perform the parameter correction method for the engine as described above.
In another aspect, the present invention further provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions are executed by a processor to implement the parameter correction method of the engine as described above.
In another aspect, the present invention also provides a computer program product comprising a computer program which, when executed by a processor, implements a parameter correction method for an engine as described above.
The parameter correction method and device for the engine provided by the invention have the advantages that target parameters such as the fuel injection advance angle, the fuel injection quantity and the urea injection quantity of the engine are obtained, the first correction parameter corresponding to the fuel quality of the engine is determined, the second correction coefficient is determined based on the rotating speed, the combustion chamber volume, the compression clearance, the cylinder sleeve protrusion quantity, the fuel injector protrusion quantity, the valve protrusion quantity and the torque of the engine, and therefore the target parameters are corrected according to the second correction parameter and the first correction parameter. According to the invention, the engine corrects the target parameters of the fuel injection advance angle, the fuel injection quantity and the urea injection quantity based on the fuel quality, the rotating speed of the engine, the volume of a combustion chamber, the compression clearance, the cylinder sleeve protrusion quantity, the fuel injector protrusion quantity, the valve protrusion quantity and the torque, so that the discrete error of the engine is reduced, the emission consistency and the performance consistency of the engine are improved, and the residue discharged by the engine is prevented from exceeding the calibration range.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a system architecture diagram of a method for implementing parameter correction for an engine according to the present invention;
FIG. 2 is a schematic flow chart diagram illustrating a parameter correction method for an engine according to a first embodiment of the present invention;
FIG. 3 is a detailed flowchart of step S40 of the second embodiment of the parameter correction method for the engine according to the present invention;
FIG. 4 is a detailed flowchart of step S40 of the third embodiment of the parameter correction method for the engine according to the present invention;
FIG. 5 is a functional block diagram of a parameter correction device of the engine of the present invention;
fig. 6 is a schematic diagram of a hardware configuration of the parameter correction device of the engine according to the present invention.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The invention provides a parameter correction method of an engine, which can be realized by a system architecture diagram shown in figure 1. As shown in fig. 1, engine 100 is provided with combustion chamber 110, combustion chamber 110 is connected to exhaust pipe 120, and exhaust pipe 120 is provided with urea nozzle 130. Engine 100 may adjust the advance angle and amount of fuel injected to control the amount of exhaust gas emitted from combustion chambers 110. The engine 100 can inject urea to the exhaust pipe 120 through the urea nozzle 130, and the urea chemically reacts with exhaust gas in the exhaust pipe 120 to purify the exhaust gas, so that residues exceeding a calibration range are prevented from being discharged by the engine 100, and the performance consistency and the discharge consistency of the engine are improved.
The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
Referring to fig. 2, fig. 2 shows a first embodiment of a parameter correction method of an engine according to the present invention, the parameter correction method of the engine comprising the steps of:
and step S10, acquiring the current target parameters of the engine, wherein the target parameters comprise at least one of the advance angle of fuel injection, the fuel injection quantity and the urea injection quantity.
In this embodiment, the engine is a fuel-powered engine, and when the engine is running, power is generated by burning diesel or gasoline, and the engine discharges exhaust gas generated by the combustion. The engine discharges exhaust gas through an exhaust pipe, and a urea nozzle is provided in the exhaust pipe to reduce nitrogen oxides in the exhaust gas by reacting urea with nitrogen oxides in the exhaust gas in order to purify the exhaust gas.
Exhaust gas emitted from engine and engineThe oil injection quantity and the oil injection advance angle of the engine are related. The magnitude of the fuel injection quantity determines the power of the engine and whether the fuel in the combustion chamber is sufficiently combusted. For diesel engine, when the advance angle of fuel injection is increased, the particle emission can be reduced, but the nitrogen oxide NO in the exhaust gasxBut gradually rises. The fuel injection advance angle of the engine exceeds a certain value, which can not only lead NOXThe emission values of (a) increase, and the emission values of CO and HC also increase.
When the emission consistency of the engine needs to be improved, the engine acquires current target parameters, and the target parameters comprise at least one of an oil injection advance angle, an oil injection quantity and a urea injection quantity.
And step S20, determining a first correction coefficient corresponding to the fuel quality of the engine.
The content of nitrogen oxides in the exhaust gas of an engine is related to the fuel quality. The better the fuel quality, the lower the content of nitrogen oxides and sulfides in the exhaust gas. The engine may obtain the fuel related parameter to determine the fuel quality based on the fuel related parameter. The relevant parameters may be nitrogen content, sulphur content, hydrogen content, etc. in the fuel. Corresponding weights can be set for the nitrogen content, the sulfur content and the hydrogen content, and the fuel quality can be obtained by performing weighted calculation on the nitrogen content, the sulfur content, the hydrogen content and the weights. The engine stores the mapping relation between the fuel quality and the first correction coefficient, and the engine can determine the first correction coefficient through the fuel quality and the mapping relation. The first correction coefficient is for correcting the target parameter. The mapping relation between the first correction coefficient and the fuel quality is obtained through manually measured data. Of course, the data of the fuel can be constructed into a lookup table, that is, the engine can find the first correction coefficient through the lookup table and the fuel quality.
And step S30, acquiring a second correction coefficient corresponding to the target parameter, wherein the second correction coefficient is determined according to the rotating speed of the engine, the volume of the combustion chamber, the compression clearance, the cylinder sleeve protrusion amount, the fuel injector protrusion amount, the valve protrusion amount and the torque.
And after determining the first correction coefficient, acquiring a second correction coefficient. Since the engine inevitably generates a discrete error during the production process, the target parameter needs to be compensated based on the discrete error, that is, by the second correction coefficient. The second correction coefficient is determined by the rotation speed of the engine, the volume of the combustion chamber, the sleeve cylinder protrusion amount, the fuel injection amount protrusion amount, the gas protrusion amount and the torque. Specifically, after the engine is produced, the engine is tested, the volume of a combustion chamber and the compression clearance (when a piston is positioned at a compression top dead center, the distance between the top of the piston and a cylinder cover is the compression clearance) are measured, the rotating speed and the torque of the engine are recorded, the cylinder sleeve protrusion amount, the fuel injector protrusion amount and the valve protrusion amount of the engine at the rotating speed are recorded, waste gas (waste gas purified by urea) discharged from the engine is measured, and finally, target parameters are adjusted repeatedly through the discharged waste gas, so that the discharged waste gas reaches the standard, and a second correction coefficient of the target parameters of the engine at the rotating speed, the volume of the combustion chamber, the cylinder sleeve protrusion amount, the fuel injection amount protrusion amount, the gas protrusion amount and the torque is obtained through conversion. Through measuring in this way, the second correction coefficient of the target parameter under different working conditions can be obtained, a lookup table of the second correction coefficient can be established by the working conditions and the second correction coefficient, and the working conditions consist of parameters such as rotating speed, combustion chamber volume, sleeve cylinder protrusion, fuel injection protrusion, gas protrusion and torque. The engine can obtain a second correction coefficient in the lookup table based on the rotating speed, the volume of the combustion chamber, the compression clearance, the cylinder sleeve protrusion amount, the fuel injector protrusion amount, the valve protrusion amount and the torque of the engine. Further, the rotation speed and the torque of the engine may be constant, so the engine may store the second correction coefficient, and when the correction of the target parameter is required, the second correction coefficient is directly acquired.
The second correction coefficient includes at least one of an advance angle correction coefficient, an injection quantity correction coefficient, and a urea injection quantity correction coefficient.
In step S40, the target parameter is corrected based on the first correction coefficient and the second correction coefficient.
After the engine determines the first correction coefficient and the second correction coefficient, the engine corrects the target parameter based on the first correction coefficient and the second correction coefficient. That is, the target parameter is multiplied by the first correction coefficient and the second correction coefficient to obtain the corrected target parameter.
In the technical scheme provided by the embodiment, target parameters such as an injection advance angle, an injection quantity and a urea injection quantity of the engine are obtained, a first correction parameter corresponding to the fuel quality of the engine is determined, a second correction coefficient is determined based on the rotating speed of the engine, the volume of a combustion chamber, the compression clearance, the cylinder sleeve protrusion quantity, the injector protrusion quantity, the valve protrusion quantity and the torque, and therefore the target parameters are corrected according to the second correction parameter and the first correction parameter. According to the invention, the engine corrects the target parameters of the fuel injection advance angle, the fuel injection quantity and the urea injection quantity based on the fuel quality, the rotating speed of the engine, the volume of a combustion chamber, the compression clearance, the cylinder sleeve protrusion quantity, the fuel injector protrusion quantity, the valve protrusion quantity and the torque, so that the discrete error of the engine is reduced, the emission consistency and the performance consistency of the engine are improved, and the residue discharged by the engine is prevented from exceeding the calibration range.
Referring to fig. 3, fig. 3 shows a second embodiment of the parameter correction method for an engine according to the present invention, wherein step S40 includes:
step S41, a top dead center deviation of a piston of the engine is obtained, and a correction value is determined according to the top dead center deviation.
In step S42, the correction value is corrected based on the second correction coefficient.
In step S43, the injection advance angle is corrected based on the corrected correction value and the first correction coefficient.
In the present embodiment, the target parameter includes an advanced fuel injection angle. When the advanced oil injection angle needs to be corrected, the top dead center deviation of the piston needs to be acquired.
The top dead center deviation of the piston is obtained by testing the top dead center of the piston after the engine is generated, namely the deviation between the position set by the top dead center and the actual position of the top dead center is the top dead center deviation. And a correction value is correspondingly arranged on the top dead center deviation and is used for correcting the second correction coefficient.
After the engine determines the correction value through the top dead center deviation, the correction value is corrected through the second correction coefficient to obtain the corrected correction value.
The engine multiplies the first correction coefficient by the injection advance angle to obtain a numerical value, and the numerical value is superposed with the corrected correction value to obtain the corrected injection advance angle. The engine can spray fuel oil to the combustion chamber based on the corrected fuel injection advance angle.
In the technical scheme provided by the embodiment, the engine obtains the top dead center deviation of the piston, determines the correction value through the top dead center deviation, corrects the correction value through the second correction coefficient, and finally corrects the fuel injection advance angle accurately through the corrected correction value and the first correction coefficient.
Referring to fig. 4, fig. 4 shows a third embodiment of the parameter correction method for an engine according to the present invention, and step S40 includes:
and step S44, acquiring the urea quality coefficient of the urea solution.
In step S45, the urea injection amount is corrected based on the urea quality coefficient, the first correction coefficient, and the second correction coefficient.
In this embodiment, when the engine performs exhaust gas purification, urea solution injection needs to be performed in the exhaust pipe. When purifying the exhaust gas, the content of urea in the urea solution needs to be considered, that is, the urea quality coefficient of the urea solution needs to be obtained.
The urea quality coefficient characterizes the range of urea content in the urea solution, which can be input by a user to the engine for storage. When the urea injection quantity needs to be corrected, namely the target parameter comprises the urea injection quantity, the engine acquires a urea quality coefficient of the urea solution, so that the urea injection quantity is corrected according to the first correction coefficient, the second correction coefficient and the urea quality coefficient. Specifically, the corrected urea injection amount can be obtained by multiplying the first correction coefficient, the second correction coefficient, and the urea quality coefficient by the current urea injection amount, and the engine can inject the urea injection amount into the exhaust pipe based on the corrected urea injection amount.
In the technical solution provided in this embodiment, when the target parameter includes the urea injection amount, the engine obtains the urea quality coefficient of the urea solution, so as to accurately correct the urea injection amount through the urea quality coefficient, the first correction coefficient, and the second correction coefficient.
In one embodiment, the engine obtains a predetermined composition level of the fuel, the predetermined composition level comprising at least one of a sulfur level, a carbon level, and a hydrogen level. The engine can determine a first correction coefficient corresponding to the fuel quality through the content of the preset components. The fuel quality can be a grade, which can be determined by the sulfur content, the carbon content and the hydrogen content, the higher the grade, the better the fuel quality. The engine is based on the grade-related parameter as a first correction factor.
In one embodiment, a computational model is provided in the engine. The first correction coefficient is obtained by calculating the content of preset components of the fuel oil through a calculation model, the second correction coefficient is obtained by calculating the rotation speed, the torque, the combustion chamber volume, the compression clearance, the cylinder sleeve protrusion amount, the fuel injector protrusion amount and the valve protrusion amount of the engine through the calculation model, and the content of the preset components comprises at least one of sulfur content, carbon content and hydrogen content.
Specifically, the server uses test data of the engine, and a group of test data is used as a training sample and a label of the training sample. The test data comprises the rotating speed, the torque, the combustion chamber volume, the compression clearance, the cylinder sleeve protrusion amount, the fuel injector protrusion amount and the valve protrusion amount of the engine, and the label is recorded as a test to obtain a second correction coefficient. And training the model through different training samples to obtain the calculation model. The server then sends the computational model to the engine. The server can also adopt the content of the preset components in the fuel oil as a training sample, and a first correction coefficient related to the content of the preset components is used as a label of the training sample, so that a calculation model is obtained through the training sample training model. The server can combine the two calculation models into one, when the input parameters are the content of the preset components of the fuel, a first correction coefficient is output, and if the input parameters are the rotating speed, the torque, the combustion chamber volume, the compression clearance, the cylinder sleeve protrusion amount, the fuel injector protrusion amount and the valve protrusion amount of the engine, a second correction coefficient output by the model is calculated. Of course, the calculation method can be divided into a first calculation model and a second calculation model, wherein the first calculation model is used for calculating the first correction coefficient, and the second calculation model is used for calculating the second correction coefficient.
The present invention also provides an engine, and referring to fig. 5, an engine 500 includes:
the acquiring module 501 is configured to acquire a current target parameter of an engine, where the target parameter includes at least one of an advance angle of fuel injection, an amount of fuel injection, and an amount of urea injection;
a determining module 502, configured to determine a first correction coefficient corresponding to fuel quality of an engine;
the obtaining module 501 is configured to obtain a second correction coefficient corresponding to a target parameter, where the second correction coefficient is determined according to a rotation speed of an engine, a volume of a combustion chamber, a compression clearance, a cylinder liner protrusion amount, an injector protrusion amount, a valve protrusion amount, and a torque;
and a modification module 503, configured to modify the target parameter according to the first modification coefficient and the second modification coefficient.
In one embodiment, the engine 500 includes:
an obtaining module 501, configured to obtain a top dead center deviation of a piston of an engine, and determine a correction value according to the top dead center deviation;
a correction module 503, configured to correct the correction value according to the second correction coefficient;
and correcting the fuel injection advance angle according to the corrected correction value and the first correction coefficient.
In one embodiment, the engine 500 includes:
an obtaining module 501, configured to obtain a urea quality coefficient of a urea solution;
a correction module 503 for correcting the urea injection amount according to the urea quality factor, the first correction factor and the second correction factor.
In one embodiment, the engine 500 includes:
the fuel composition obtaining method comprises an obtaining module 501, a calculating module and a controlling module, wherein the obtaining module is used for obtaining the content of preset components of fuel oil of an engine, and the content of the preset components comprises at least one of sulfur content, carbon content and hydrogen content;
the determining module 502 is configured to determine a first correction coefficient corresponding to fuel quality according to the content of the preset component.
In one embodiment, the engine 500 includes:
an acquisition module 501 for acquiring the rotation speed, compression clearance, torque and combustion chamber volume of an engine;
the acquiring module 501 is used for acquiring a cylinder sleeve protrusion amount, an oil injector protrusion amount and a valve protrusion amount of an engine at a rotating speed;
the determining module 502 is configured to determine a second correction coefficient corresponding to the target parameter according to the rotation speed, the torque, the combustion chamber volume, the cylinder liner protrusion amount, the injector protrusion amount, and the valve protrusion amount, where the second correction coefficient includes at least one of an advance angle correction coefficient, an injection amount correction coefficient, and a urea injection amount correction coefficient.
FIG. 6 is a schematic diagram of a hardware configuration of an engine shown in accordance with an exemplary embodiment.
The engine 600 may include: a processor 61, such as a CPU, a memory 62 and a transceiver 63. Those skilled in the art will appreciate that the configuration shown in FIG. 6 is not limiting to engines and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. The memory 62 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The processor 61 may call a computer program stored in the memory 62 to perform all or part of the steps of the above-described parameter correction method of the engine.
The transceiver 63 is used for receiving and transmitting information from and to an external device.
A non-transitory computer readable storage medium having instructions therein which, when executed by a processor of an engine, enable the engine to perform the parameter correction method of the engine described above.
A computer program product comprising a computer program which, when executed by a processor of an engine, enables the engine to carry out the parameter correction method of the engine described above.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A parameter correction method for an engine, characterized by comprising:
acquiring current target parameters of an engine, wherein the target parameters comprise at least one of an oil injection advance angle, an oil injection quantity and a urea injection quantity;
determining a first correction coefficient corresponding to the fuel quality of the engine;
acquiring a second correction coefficient corresponding to the target parameter, wherein the second correction coefficient is determined according to the rotating speed of the engine, the volume of a combustion chamber, the compression clearance, the cylinder sleeve protrusion, the fuel injector protrusion, the valve protrusion and the torque;
and correcting the target parameter according to the first correction coefficient and the second correction coefficient.
2. The parameter correction method of an engine according to claim 1, characterized in that the target parameter includes an oil injection advance angle, and the step of correcting the target parameter according to the first correction coefficient and the second correction coefficient includes:
acquiring top dead center deviation of a piston of the engine, and determining a correction value according to the top dead center deviation;
correcting the correction value according to the second correction coefficient;
and correcting the oil injection advance angle according to the corrected correction value and the first correction coefficient.
3. The parameter correcting method of an engine according to claim 1, characterized in that the target parameter includes a urea injection amount, and the step of correcting the target parameter according to the first correction coefficient and the second correction coefficient includes:
obtaining the urea quality coefficient of the urea solution;
and correcting the urea injection quantity according to the urea quality coefficient, the first correction coefficient and the second correction coefficient.
4. The parameter correcting method of an engine according to claim 1, wherein the step of determining a first correction coefficient corresponding to the fuel quality of the engine includes:
acquiring the content of a preset component of fuel oil of the engine, wherein the content of the preset component comprises at least one of sulfur content, carbon content and hydrogen content;
and determining a first correction coefficient corresponding to the fuel quality according to the content of the preset component.
5. The parameter correcting method of an engine according to claim 1, wherein the first correction coefficient is calculated by a calculation model of the engine from a content of a preset component of fuel, and the second correction coefficient is calculated by the calculation model from a rotation speed, a torque, a combustion chamber volume, a compression clearance, a liner protrusion, an injector protrusion, and a valve protrusion of the engine, the content of the preset component including at least one of a sulfur content, a carbon content, and a hydrogen content.
6. The parameter correcting method of an engine according to any one of claims 1 to 5, wherein the step of obtaining the second correction coefficient corresponding to the target parameter includes:
acquiring the rotating speed, the compression clearance, the torque and the combustion chamber volume of the engine;
acquiring the cylinder sleeve protrusion amount, the oil injector protrusion amount and the valve protrusion amount of the engine at the rotating speed;
and determining a second correction coefficient corresponding to the target parameter according to the rotating speed, the torque, the volume of the combustion chamber, the cylinder sleeve protrusion amount, the fuel injector protrusion amount and the valve protrusion amount, wherein the second correction coefficient comprises at least one of an advance angle correction coefficient, a fuel injection amount correction coefficient and a urea injection amount correction coefficient.
7. An engine, comprising:
the acquisition module is used for acquiring the current target parameters of the engine, wherein the target parameters comprise at least one of an oil injection advance angle, an oil injection quantity and a urea injection quantity;
the determining module is used for determining a first correction coefficient corresponding to the fuel quality of the engine;
acquiring a second correction coefficient corresponding to the target parameter, wherein the second correction coefficient is determined according to the rotating speed of the engine, the volume of a combustion chamber, the compression clearance, the cylinder sleeve protrusion, the fuel injector protrusion, the valve protrusion and the torque;
and correcting the target parameter according to the first correction coefficient and the second correction coefficient.
8. An engine, comprising: a memory and a processor;
the memory stores computer-executable instructions;
the processor executes the computer-executable instructions stored in the memory, so that the processor performs the parameter correction method of the engine according to any one of claims 1 to 6.
9. A computer-readable storage medium having stored therein computer-executable instructions for implementing a parameter correction method for an engine according to any one of claims 1 to 6 when executed by a processor.
10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, carries out a method for parameter modification of an engine according to any one of claims 1 to 6.
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