CN116537962A - Method and system for adaptively controlling balanced work of each cylinder of engine - Google Patents
Method and system for adaptively controlling balanced work of each cylinder of engine Download PDFInfo
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- CN116537962A CN116537962A CN202310602796.7A CN202310602796A CN116537962A CN 116537962 A CN116537962 A CN 116537962A CN 202310602796 A CN202310602796 A CN 202310602796A CN 116537962 A CN116537962 A CN 116537962A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012937 correction Methods 0.000 claims abstract description 94
- 239000003921 oil Substances 0.000 claims abstract description 94
- 239000010727 cylinder oil Substances 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 15
- 238000004364 calculation method Methods 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims description 64
- 239000007924 injection Substances 0.000 claims description 64
- 239000000446 fuel Substances 0.000 claims description 49
- 238000007599 discharging Methods 0.000 claims description 19
- 230000002159 abnormal effect Effects 0.000 claims description 18
- 239000010724 circulating oil Substances 0.000 claims description 11
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 2
- 208000028659 discharge Diseases 0.000 description 52
- 230000001276 controlling effect Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/008—Controlling each cylinder individually
- F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or air-fuel ratio
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
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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
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
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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
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0614—Actual fuel mass or fuel injection amount
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention discloses a system and a method for adaptively controlling the balanced work of each cylinder of an engine, wherein the system comprises a cylinder oil mass coefficient basic MAP module, an electromagnetic valve driving module, a temperature discharge signal acquisition module, a temperature discharge processing and alarming module, a temperature discharge average value calculation module, a temperature discharge automatic regulation algorithm module and an oil mass correction coefficient memory module; the electromagnetic valve driving module is connected with the cylinder oil mass coefficient basic MAP module; the temperature discharge processing and alarming module is connected with the temperature discharge signal acquisition module; the temperature discharge average value calculation module is connected with the temperature discharge processing and alarming module; the automatic temperature discharge adjusting algorithm module is connected with the temperature discharge average value calculating module; the oil quantity correction coefficient memory module is respectively connected with the automatic temperature discharge adjustment algorithm module and the cylinder oil quantity coefficient basic MAP module. The invention can meet the balanced work control of each cylinder of the marine 4-20 cylinder electric control medium-high speed engine.
Description
Technical Field
The invention belongs to the technical field of marine power control, and particularly relates to a method and a system for adaptively controlling balanced work of each cylinder of an engine.
Background
In order to reduce emissions from marine diesel engines and improve atmospheric pollution conditions, national two-stage emissions standards have been implemented at day 7, 2021. Aiming at the national two-stage emission standard, the emission of the mechanical diesel engine can not meet the development requirement, and in order to meet the requirements of laws and regulations on economy and emission performance, the electric control engine technology has become an important means for meeting emission indexes.
The research shows that the exhaust temperature of each cylinder of the engine can be used as a reference index for the balanced work of each cylinder, namely, the exhaust temperature is uniform, the exhaust temperature of the traditional mechanical engine can be used for adjusting the exhaust temperature uniformity of each cylinder through measures such as correcting the rack position of an oil pump and changing the oil supply stroke, the technology is mature, the operation is easy, and the threshold is lower. However, as an emerging technology, the electric control engine is used for controlling the temperature of the engine through the output of an electric signal, the electric control engine is built in the controller, the temperature adjustment of each cylinder can be realized only through an on-line calibration technology, the technical threshold is high, the maintenance difficulty is high, and the cost is also increased.
The exhaust temperature correction is manually corrected only through calibration software, so that the time for factory debugging of the engine is too long, and the deviating condition that the technology is improved but the production efficiency is reduced occurs; the other is that the electric control engine has stronger technical capability, the actual working environment of the engine is complex, the general clients are difficult to maintain by themselves, certain electric control technical knowledge is needed, the cost is improved by being equipped with hardware for on-line calibration, otherwise, once the balance deviation is too much, the service life of the engine is easily shortened.
Therefore, there is a need for a method and system for adaptively controlling the balancing operation of each cylinder of an engine.
Disclosure of Invention
The invention aims to provide a method and a system for adaptively controlling the balanced work of each cylinder of an engine, which can meet the balanced work control of each cylinder of a 4-20 cylinder electric control medium-high speed engine for a ship and solve the problems of strong temperature discharge debugging speciality and high after-sales service cost of the electric control engine.
In a first aspect, the system for adaptively controlling the balanced operation of each cylinder of an engine comprises a cylinder oil mass coefficient basic MAP module, an electromagnetic valve driving module, a temperature discharge signal acquisition module, a temperature discharge processing and alarming module, a temperature discharge average value calculation module, a temperature discharge automatic adjustment algorithm module and an oil mass correction coefficient memory module;
the cylinder oil mass coefficient basic MAP module is used for storing oil mass correction basic values of all cylinders under all working conditions;
the electromagnetic valve driving module is used for converting actual fuel injection quantity of each cylinder into time parameters and driving the electromagnetic valve to realize accurate injection, and is connected with the cylinder fuel quantity coefficient basic MAP module;
the temperature discharge signal acquisition module is used for acquiring temperature discharge signals of all cylinders;
the temperature-discharging processing and alarming module is used for judging whether the air cylinder has faults or not according to the temperature-discharging signals, discriminating a normal temperature-discharging air cylinder and alarming when the air cylinder has abnormality, and is connected with the temperature-discharging signal acquisition module;
the temperature-discharging average value calculation module is used for calculating the average temperature of the temperature-discharging normal cylinder number, namely the temperature-discharging value of the normal cylinder, and is connected with the temperature-discharging processing and alarming module;
the automatic temperature discharge adjusting algorithm module is used for automatically correcting the fuel injection quantity of each cylinder according to the temperature discharge value of each normal cylinder so as to achieve the aim of consistent temperature discharge, and is connected with the temperature discharge average value calculating module;
the oil quantity correction coefficient memory module is used for temporarily storing the oil quantity correction coefficient under each working condition, and is stored in the cylinder oil quantity coefficient basic MAP module after being confirmed without errors, and the oil quantity correction coefficient memory module is respectively connected with the automatic temperature discharge adjustment algorithm module and the cylinder oil quantity coefficient basic MAP module.
Optionally, each cylinder is provided with a manual switch, and when the manual switch of the cylinder is triggered, the exhaust temperature of the cylinder can be automatically corrected. The automatic temperature discharge correction can be carried out by only starting a certain cylinder according to actual requirements, and the oil quantity correction is needed to be carried out on a single cylinder after the oil pump or the oil sprayer of a certain cylinder of an engine is damaged and replaced in a suitable scene.
In a second aspect, the present invention provides a method for adaptively controlling the balance operation of each cylinder of an engine, and the method comprises the following steps:
when the engine stably runs, inquiring an oil quantity correction coefficient of each cylinder under the current working condition through the target rotating speed of the engine and the circulating oil injection quantity, and multiplying the oil quantity correction coefficient of each cylinder by the circulating oil injection quantity to obtain the actual oil injection quantity of each cylinder under the current working condition; converting the actual fuel injection quantity of each cylinder into the driving time of the electromagnetic valve so as to drive the electromagnetic valve to inject fuel into the cylinder;
acquiring temperature discharge signals of each cylinder, and judging whether the temperature discharge of the corresponding cylinder is abnormal or not based on the acquired temperature discharge signals of each cylinder; when the temperature of the engine is abnormal, the injection oil quantity is kept and is not corrected, and whether the fuel injection of the abnormal cylinder is closed or not can be manually selected; if the exhaust temperature of the engine is not abnormal, calculating a normal cylinder exhaust temperature standard value, and executing automatic exhaust temperature correction;
when the air cylinders are in the debugging mode, the engine is stably operated, corresponding working conditions are searched according to the target rotating speed of the engine and the circulating fuel injection quantity, the fuel injection quantity of the corresponding air cylinders is automatically corrected according to the temperature of each air cylinder under the working conditions, and when the temperature of each air cylinder reaches the standard requirement, the fuel quantity correction coefficient is automatically recorded and written into the fuel quantity coefficient basic MAP.
Optionally, each cylinder is provided with an oil quantity coefficient correction MAP, the engine speed is taken as an X axis, the circulating oil injection quantity is taken as a Y axis, and the oil quantity correction coefficient applicable under the current working condition of each cylinder is searched according to the speed and the oil quantity.
Optionally, calculating the actual fuel injection quantity of the next cycle of each cylinder according to the real-time cycle fuel injection quantity of the engine and the oil quantity correction coefficient of each cylinder, and adjusting the temperature of each cylinder by adjusting the fuel injection quantity of each cylinder.
Optionally, after the exhaust temperature normal cylinder is screened, the exhaust temperature average value of the engine and the non-uniformity of the exhaust temperature of each cylinder are calculated according to the effective exhaust temperature.
Optionally, after calculating the fuel injection amount for each cylinder, it is confirmed whether the correction coefficient is within a reasonable range, and if the correction coefficient is not within a reasonable range, the fuel amount correction coefficient is corrected by manual correction.
Alternatively, when the cylinder has abnormal temperature discharge faults, the cylinder is manually closed to be effective; when the cylinder is at normal temperature, the manual closing of the cylinder is not effective, thereby preventing unstable engine operation caused by misoperation.
Optionally, the automatic temperature discharge correction specifically includes:
acquiring the real-time exhaust temperature of each cylinder of the engine;
sequencing the normal exhaust temperatures of all the cylinders to obtain maximum and minimum exhaust temperatures, and correcting the oil quantity of the cylinders with the highest exhaust temperatures and the lowest exhaust temperatures;
calculating the exhaust temperature out-of-tolerance ratio of the cylinder, wherein when the exhaust temperature out-of-tolerance is large, the oil injection quantity is corrected to be large, and when the exhaust temperature out-of-tolerance is small, the oil injection quantity is corrected to be small;
and is provided with an oil quantity correction step size limiting value, and the correction quantity of each oil injection quantity is smaller than or equal to the oil quantity correction step size value.
Optionally, an automatic exhaust temperature correction range is set, when the exhaust temperature of the cylinder exceeds the set exhaust temperature correction range, the exhaust temperature of the cylinder is not corrected, and when the exhaust temperature of the cylinder is within the set exhaust temperature correction range, the exhaust temperature of the cylinder is automatically corrected.
The invention has the following advantages:
1. the consistency of the fuel injection pump and the fuel injector is different when leaving the factory: the spraying time is the same, the sprayed actual oil quantity is different, and the atomization is inconsistent due to different spraying pressures; in addition, when the engine is assembled, the technical conditions of the respective cylinders are different. The above causes cause the temperature of each cylinder of the engine to be inconsistent. According to the invention, an oil mass coefficient base MAP is arranged for each cylinder, and the actual oil injection quantity of each cylinder is obtained by multiplying the oil mass coefficient by the circulating oil injection quantity calculated by the engine, so that the temperature discharge difference caused by the inconsistency of various internal and external conditions is solved.
2. When the engine runs, abnormal conditions can occur to the cylinders, for example, when the engine runs under low working conditions, the individual cylinders are easy to be not ignited; leakage of fuel from the fuel injector into the cylinder may cause excessive exhaust temperatures or cylinder misfire. The fuel is continuously injected into the cylinder under the condition that the cylinder is in fire, so that carbon deposition can be caused, mechanical parts are damaged, and resource waste is caused; the continuous operation of the engine in a higher exhaust temperature state can also lead to the damage of mechanical parts of the diesel engine and even serious accidents. In order to solve the situation, the alarm processing and alarm module of each cylinder can accurately judge whether faults such as broken lines, fire and alarm occur in each cylinder. When a fire or abnormal high temperature of a certain cylinder is detected, the cylinder can be manually closed after the fire or abnormal high temperature is judged, so that the cost is saved and the mechanical parts are protected.
3. When the engine is debugged and delivered, a worker generally adjusts the oil injection quantity of each cylinder under each working condition of the engine manually to achieve the aim of consistent temperature discharge, so that the time and the labor are consumed, the self-memory oil quantity temperature discharge correction debugging mode is used, the temperature discharge of the engine can be automatically adjusted under the corresponding working condition, the oil quantity correction coefficient under the working condition is automatically recorded, and the temperature discharge debugging time of the engine is greatly shortened. In addition, the oil quantity is too much, so that the temperature discharge is low, the oil quantity cannot be increased due to the low temperature discharge, and the maximum and minimum limit values of the oil quantity correction coefficients are set, so that the oil quantity correction coefficients of all cylinders are ensured to be in a reasonable range.
4. In the engine shipping use process, mechanical parts such as an oil pump, an oil injector and the like are replaced after being damaged, the air cylinder needs to readjust the oil injection quantity correction coefficient to keep the temperature discharge consistency, a client can open a debugging mode of a specific air cylinder, the air cylinder can automatically correct the temperature discharge under each working condition, the oil quantity correction coefficient under each working condition is automatically recorded, the waiting time is saved, and the on-board debugging service cost of a host factory is saved.
5. The engine has a running-in period with a certain time after leaving the factory, and the performances of an oil pump, an oil sprayer and the like before and after the running-in period have a certain difference. The calibrated fuel quantity correction base MAP at the engine shipment may not be suitable for the engine after running-in. The automatic temperature discharge correction is started on the basis of the oil quantity correction coefficient base MAP, so that the consistency of the temperature discharge of the engine can be further ensured.
6. In summary, the invention can be applied to the automatic control of the working uniformity of each cylinder of a 4-20 cylinder electric control medium-high speed engine, the quick delivery debugging of the diesel engine is realized while the consistency of the exhaust temperature of the engine under each working condition is ensured, the delivery time of the engine after the delivery of the user is greatly shortened by the self-adaptive control advantage of the electric control, meanwhile, after the delivery of the engine to a customer, the customer can replace an oil pump or an oil injector by himself, and then the exhaust temperature automatic correction switch of the corresponding cylinder is started, so that the oil quantity correction coefficient of the cylinder can be automatically calculated and stored, the delivery service of the after-sales stage is greatly reduced, and the cost is reduced.
Drawings
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a logic block diagram of the oil mass self-memory drain temperature correction method of the present invention;
FIG. 3 is a block diagram of an automatic temperature discharge correction algorithm in the present invention;
in the figure: 1. the system comprises an electromagnetic valve driving module, a cylinder oil mass coefficient basic MAP module, an oil mass correction coefficient memory module, a temperature discharge signal acquisition module, a temperature discharge processing and alarming module, a temperature discharge average value calculation module, a temperature discharge automatic adjustment algorithm module and a temperature discharge control module.
The specific embodiment is as follows:
the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, in this embodiment, a system for adaptively controlling the balanced operation of each cylinder of an engine includes a cylinder oil mass coefficient basic MAP module 2, a solenoid valve driving module 1, a temperature discharge signal acquisition module 4, a temperature discharge processing and alarming module 5, a temperature discharge average value calculation module 6, a temperature discharge automatic adjustment algorithm module 7 and an oil mass correction coefficient memory module 3. The electromagnetic valve driving module 1 is connected with the cylinder oil mass coefficient basic MAP module 2; the temperature discharge processing and alarming module 5 is connected with the temperature discharge signal acquisition module 4; the temperature discharge average value calculation module 6 is connected with the temperature discharge treatment and alarm module 5; the automatic temperature discharge adjusting algorithm module 7 is connected with the temperature discharge average value calculating module 6; the oil quantity correction coefficient memory module 3 is respectively connected with the automatic temperature discharge adjustment algorithm module 7 and the cylinder oil quantity coefficient basic MAP module 2.
As shown in fig. 1, in this embodiment, the cylinder oil mass coefficient base MAP module 2 is configured to store an oil mass correction base value of each cylinder under each working condition; the method comprises the steps of setting an oil quantity coefficient correction MAP for each cylinder, taking the rotation speed of an engine as an X axis, taking the circulating oil injection quantity as a Y axis, and searching the oil quantity correction coefficient applicable to the current working condition of each cylinder according to the rotation speed and the oil quantity. And when the engine stably runs, inquiring the oil quantity correction coefficient of each cylinder under the current working condition through the target rotating speed of the engine and the circulating oil injection quantity, and multiplying the oil quantity correction coefficient of each cylinder by the circulating oil injection quantity to obtain the actual oil injection quantity of each cylinder under the current working condition.
In this embodiment, as shown in fig. 1, the electromagnetic valve driving module 1 is configured to convert the actual fuel injection amount of each cylinder into a time parameter, and drive the electromagnetic valve to achieve precise injection.
In this embodiment, as shown in fig. 1, the exhaust temperature signal acquisition module 4 is configured to acquire exhaust temperature signals of each cylinder.
In this embodiment, as shown in fig. 1, the temperature exhaust processing and alarm module 5 is configured to determine whether a fault (such as wire breakage, fire, alarm) occurs according to the temperature exhaust signal, discriminate a normal temperature exhaust cylinder, and alarm when an abnormality occurs.
As shown in fig. 1, in this embodiment, the exhaust temperature average value calculating module 6 is configured to calculate an average exhaust temperature of the exhaust temperature normal cylinder number, that is, an exhaust temperature value of the normal cylinder.
As shown in fig. 1, in this embodiment, the automatic temperature-adjusting algorithm module 7 is configured to automatically correct the fuel injection quantity of each cylinder according to the temperature-adjusting value of each normal cylinder, so as to achieve the purpose of uniform temperature adjustment, and the automatic temperature-adjusting algorithm module 7 is connected with the temperature-adjusting average calculating module 6.
As shown in fig. 1, in this embodiment, the oil quantity correction coefficient memory module 3 is configured to temporarily store the oil quantity correction coefficient under each working condition, and store the oil quantity correction coefficient in the cylinder oil quantity coefficient base MAP module 2 after confirming that the oil quantity correction coefficient is correct.
As shown in fig. 2, in the present embodiment, a method for adaptively controlling the balance operation of each cylinder of an engine, which is a system for adaptively controlling the balance operation of each cylinder of an engine as described in the present embodiment, is adopted, and the method includes the steps of:
when the engine stably runs, inquiring an oil quantity correction coefficient of each cylinder under the current working condition through the target rotating speed of the engine and the circulating oil injection quantity, and multiplying the oil quantity correction coefficient of each cylinder by the circulating oil injection quantity to obtain the actual oil injection quantity of each cylinder under the current working condition; converting the actual fuel injection quantity of each cylinder into the driving time of the electromagnetic valve so as to drive the electromagnetic valve to inject fuel into the cylinder;
acquiring temperature discharge signals of each cylinder, and judging whether the temperature discharge of the corresponding cylinder is abnormal (such as a cylinder temperature discharge fire or abnormal high temperature) based on the acquired temperature discharge signals of each cylinder; when the exhaust temperature of the engine is abnormal, the injection oil quantity is kept, the corresponding cylinder can be shielded manually after manual confirmation without correction, the power operation is reduced, the fuel oil resource is saved, the mechanical parts are protected, the damage is reduced, and the service life of the engine is prolonged; if the exhaust temperature of the engine is not abnormal, calculating a normal cylinder exhaust temperature standard value, and executing automatic exhaust temperature correction;
when the air cylinders are in the debugging mode, the engine is stably operated, corresponding working conditions are searched according to the target rotating speed of the engine and the circulating fuel injection quantity, the fuel injection quantity of the corresponding air cylinders is automatically corrected according to the temperature of each air cylinder under the working conditions, and when the temperature of each air cylinder reaches the standard requirement, the fuel quantity correction coefficient is automatically recorded and written into the fuel quantity coefficient basic MAP.
In the embodiment, the actual fuel injection quantity of the next cycle of each cylinder is calculated according to the real-time cycle fuel injection quantity of the engine and the oil quantity correction coefficient of each cylinder, and the temperature of each cylinder is adjusted by adjusting the fuel injection quantity of each cylinder.
In this embodiment, after the exhaust temperature normal cylinder is discriminated, the exhaust temperature average value of the engine and the unevenness of the exhaust temperature of each cylinder are calculated from the effective exhaust temperature.
In this embodiment, after the fuel injection amount of each cylinder is calculated, it is confirmed whether the correction coefficient is within a reasonable range, and if the correction coefficient is not within a reasonable range, the fuel amount correction coefficient is corrected by manual correction.
In the embodiment, when the air cylinder has abnormal temperature discharge faults, the air cylinder is manually closed to act; when the cylinder is at normal temperature, the manual closing of the cylinder is not effective, thereby preventing unstable engine operation caused by misoperation.
As shown in fig. 3, in this embodiment, the automatic temperature discharge correction is specifically:
acquiring the real-time exhaust temperature of each cylinder of the engine;
sequencing the normal exhaust temperatures of all the cylinders to obtain maximum and minimum exhaust temperatures, and correcting the oil quantity of the cylinders with the highest exhaust temperatures and the lowest exhaust temperatures; calculating the exhaust temperature out-of-tolerance ratio of the cylinder, wherein when the exhaust temperature out-of-tolerance is large, the oil injection quantity is corrected to be large, and when the exhaust temperature out-of-tolerance is small, the oil injection quantity is corrected to be small; and is provided with an oil quantity correction step size limiting value, and the correction quantity of each oil injection quantity is smaller than or equal to the oil quantity correction step size value.
In this embodiment, the automatic exhaust temperature correction range is set, and when the cylinder exhaust temperature exceeds the set exhaust temperature correction range, the cylinder exhaust temperature is not corrected. When the exhaust temperature of the cylinder is in the set exhaust temperature correction range, the exhaust temperature of the cylinder is automatically corrected, namely, the exhaust temperature is automatically regulated and stabilized, and then the solution function of the time is used.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (10)
1. The system for adaptively controlling the balanced work of each cylinder of the engine is characterized by comprising a cylinder oil mass coefficient basic MAP module (2), an electromagnetic valve driving module (1), a temperature discharge signal acquisition module (4), a temperature discharge processing and alarming module (5), a temperature discharge average value calculation module (6), a temperature discharge automatic regulation algorithm module (7) and an oil mass correction coefficient memory module (3);
the cylinder oil quantity coefficient basic MAP module (2) is used for storing oil quantity correction basic values of all cylinders under all working conditions;
the electromagnetic valve driving module (1) is used for converting actual fuel injection quantity of each cylinder into time parameters and driving the electromagnetic valve to realize accurate injection, and the electromagnetic valve driving module (1) is connected with the cylinder fuel quantity coefficient basic MAP module (2);
the temperature discharge signal acquisition module (4) is used for acquiring temperature discharge signals of all cylinders;
the temperature-discharging processing and alarming module (5) is used for judging whether the air cylinder with normal temperature discharging is out of order according to the temperature-discharging signal, alarming when abnormality exists, and the temperature-discharging processing and alarming module (5) is connected with the temperature-discharging signal acquisition module (4);
the temperature-discharging average value calculation module (6) is used for calculating the average temperature of the temperature-discharging normal cylinder number, namely, the temperature-discharging average value as the temperature-discharging value of the normal cylinder, and the temperature-discharging average value calculation module (6) is connected with the temperature-discharging processing and alarming module (5);
the automatic temperature discharge adjusting algorithm module (7) is used for automatically correcting the fuel injection quantity of each cylinder according to the temperature discharge value of each normal cylinder so as to achieve the aim of consistent temperature discharge, and the automatic temperature discharge adjusting algorithm module (7) is connected with the temperature discharge average value calculating module (6);
the oil quantity correction coefficient memory module (3) is used for temporarily storing oil quantity correction coefficients under various working conditions, and the oil quantity correction coefficients are stored in the cylinder oil quantity coefficient basic MAP module (2) after being confirmed to be correct, and the oil quantity correction coefficient memory module (3) is respectively connected with the automatic temperature discharge adjustment algorithm module (7) and the cylinder oil quantity coefficient basic MAP module (2).
2. The system for adaptively controlling the balanced operation of each cylinder of an engine according to claim 1, wherein: each cylinder is provided with a manual switch, and when the manual switch of the cylinder is triggered, the temperature discharge of the cylinder can be automatically corrected.
3. A method for adaptively controlling the balanced work of each cylinder of an engine is characterized by comprising the following steps of: a system for adaptively controlling the balance operation of each cylinder of an engine according to claim 1 or 2, the method comprising the steps of:
when the engine stably runs, inquiring an oil quantity correction coefficient of each cylinder under the current working condition through the target rotating speed of the engine and the circulating oil injection quantity, and multiplying the oil quantity correction coefficient of each cylinder by the circulating oil injection quantity to obtain the actual oil injection quantity of each cylinder under the current working condition; converting the actual fuel injection quantity of each cylinder into the driving time of the electromagnetic valve so as to drive the electromagnetic valve to inject fuel into the cylinder;
acquiring temperature discharge signals of each cylinder, and judging whether the temperature discharge of the corresponding cylinder is abnormal or not based on the acquired temperature discharge signals of each cylinder; when the temperature of the engine is abnormal, the injection oil quantity is kept and is not corrected, and whether the fuel injection of the abnormal cylinder is closed or not can be manually selected; if the exhaust temperature of the engine is not abnormal, calculating a normal cylinder exhaust temperature standard value, and executing automatic exhaust temperature correction;
when the air cylinders are in the debugging mode, the engine is stably operated, corresponding working conditions are searched according to the target rotating speed of the engine and the circulating fuel injection quantity, the fuel injection quantity of the corresponding air cylinders is automatically corrected according to the temperature of each air cylinder under the working conditions, and when the temperature of each air cylinder reaches the standard requirement, the fuel quantity correction coefficient is automatically recorded and written into the fuel quantity coefficient basic MAP.
4. A method of adaptively controlling the operation of each cylinder of an engine as in claim 3, wherein: and each cylinder is provided with an oil quantity coefficient correction MAP, the rotation speed of the engine is taken as an X axis, the circulated oil injection quantity is taken as a Y axis, and the oil quantity correction coefficient applicable to the current working condition of each cylinder is searched according to the rotation speed and the oil quantity.
5. A method of adaptively controlling the operation of each cylinder of an engine as in claim 3, wherein: and calculating the actual fuel injection quantity of the next cycle of each cylinder according to the real-time cycle fuel injection quantity of the engine and the oil quantity correction coefficient of each cylinder, and adjusting the temperature of each cylinder by adjusting the fuel injection quantity of each cylinder.
6. A method of adaptively controlling the operation of each cylinder of an engine as in claim 3, wherein: after the exhaust temperature normal cylinder is screened, the exhaust temperature average value of the engine and the non-uniformity of the exhaust temperature of each cylinder are calculated according to the effective exhaust temperature.
7. A method of adaptively controlling the operation of each cylinder of an engine as in claim 3, wherein: after the fuel injection amount of each cylinder is calculated, whether the correction coefficient is within a reasonable range is confirmed, and if the correction coefficient is not within the reasonable range, the fuel quantity correction coefficient is corrected by manual correction.
8. A method of adaptively controlling the operation of each cylinder of an engine as in claim 3, wherein: when the air cylinder has abnormal temperature discharge faults, the air cylinder is manually closed to act; when the cylinder is at normal temperature, the manual closing of the cylinder is not effective, thereby preventing unstable engine operation caused by misoperation.
9. A method of adaptively controlling the operation of each cylinder of an engine as in claim 3, wherein: the automatic temperature discharge correction specifically comprises the following steps:
acquiring the real-time exhaust temperature of each cylinder of the engine;
sequencing the normal exhaust temperatures of all the cylinders to obtain maximum and minimum exhaust temperatures, and correcting the oil quantity of the cylinders with the highest exhaust temperatures and the lowest exhaust temperatures;
calculating the exhaust temperature out-of-tolerance ratio of the cylinder, wherein when the exhaust temperature out-of-tolerance is large, the oil injection quantity is corrected to be large, and when the exhaust temperature out-of-tolerance is small, the oil injection quantity is corrected to be small;
and is provided with an oil quantity correction step size limiting value, and the correction quantity of each oil injection quantity is smaller than or equal to the oil quantity correction step size value.
10. The method for adaptively controlling the operation of each cylinder of an engine according to claim 9, wherein: and setting an automatic exhaust temperature correction range, when the exhaust temperature of the cylinder exceeds the set exhaust temperature correction range, not correcting the exhaust temperature of the cylinder, and when the exhaust temperature of the cylinder is within the set exhaust temperature correction range, automatically correcting the exhaust temperature of the cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310602796.7A CN116537962A (en) | 2023-05-25 | 2023-05-25 | Method and system for adaptively controlling balanced work of each cylinder of engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310602796.7A CN116537962A (en) | 2023-05-25 | 2023-05-25 | Method and system for adaptively controlling balanced work of each cylinder of engine |
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