CN114738131B - Method, device, equipment and medium for controlling idle speed oil injection of multi-cylinder engine - Google Patents
Method, device, equipment and medium for controlling idle speed oil injection of multi-cylinder engine Download PDFInfo
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- CN114738131B CN114738131B CN202210566283.0A CN202210566283A CN114738131B CN 114738131 B CN114738131 B CN 114738131B CN 202210566283 A CN202210566283 A CN 202210566283A CN 114738131 B CN114738131 B CN 114738131B
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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
- F02D41/16—Introducing closed-loop corrections for idling
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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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- 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
Abstract
The invention discloses an idle speed oil injection control method, device, equipment and medium of a multi-cylinder engine, which determine an actual cylinder pressure difference accumulated value and an actual single-cylinder oil injection quantity in a current oil injection period for each target cylinder in an engine of a target idle speed vehicle, determine an oil injection correction factor of each target cylinder according to the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection quantity of each target cylinder, and further adjust a reference oil injection quantity of the target cylinder in the next oil injection period according to the oil injection correction factor so as to adjust each target cylinder based on actual air intake and working conditions of each target cylinder in the current oil injection period, so that the air-fuel ratio among the cylinders is kept consistent, and the technical problem of non-uniformity of the engine caused by air intake deviation among the cylinders is solved.
Description
Technical Field
The invention relates to the technical field of automobile engines, in particular to a method, a device, equipment and a medium for controlling idle speed oil injection of a multi-cylinder engine.
Background
Idle speed stability directly affects the driver's driving experience, especially matching multi-cylinder engine users. With the gradual rise of the driving experience requirements of users and the stricter and stricter emission regulations, the uniformity of the multi-cylinder engine is provided with higher challenges. If the actual air inflow and the fuel injection quantity between cylinders of the multi-cylinder engine are inconsistent, the output torques of the cylinders are inconsistent, and further the rotating speed of a crankshaft fluctuates irregularly, and meanwhile, the emission, the oil consumption and the NVH (Noise, vibration and Harshness) are seriously influenced by the nonuniformity of the multi-cylinder engine.
The idling optimization work belongs to a part of the rack optimization work, and due to the specific ignition sequence and arrangement form of the multi-cylinder engine, the unevenness among cylinders is obvious, and mainly the actual air inlet deviation of each cylinder is different. In practical situations, the actual air intake amount between cylinders is inconsistent, and if the same fuel injection amount is adopted for each cylinder, the air-fuel ratio between the cylinders is inconsistent, and further the multi-cylinder engine is not uniform.
In the process of implementing the invention, at least the following technical problems are found in the prior art: because air inlet deviation exists among cylinders, when the cylinders adopt the same oil injection quantity, the air-fuel ratio among the cylinders is inconsistent, and further, the multi-cylinder engine has non-uniformity.
Disclosure of Invention
The invention provides a method, a device, equipment and a medium for controlling idle speed fuel injection of a multi-cylinder engine, which aim to solve the technical problem of nonuniformity of the engine caused by air intake deviation among cylinders.
According to an aspect of the present invention, there is provided a multi-cylinder engine idle fuel injection control method, including:
determining an actual cylinder pressure difference accumulated value and an actual single-cylinder oil injection quantity of each target cylinder in an engine of a target idling vehicle in a current oil injection period;
determining an oil injection correction factor corresponding to each target cylinder respectively based on the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder;
and adjusting the reference oil injection quantity of each target cylinder in the next oil injection period according to the oil injection correction factor corresponding to each target cylinder.
Optionally, the determining, based on the accumulated value of the actual cylinder pressure difference of each of the target cylinders and the actual single-cylinder fuel injection amount of each of the target cylinders, fuel injection correction factors corresponding to each of the target cylinders respectively includes:
for each target cylinder, determining the single-cylinder pressure-oil quantity ratio of the target cylinder in the current oil injection period based on the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection quantity of the target cylinder;
determining the average cylinder pressure-oil quantity ratio of the engine in the current oil injection period according to the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder;
and determining the oil injection correction factor corresponding to each target cylinder respectively based on the single-cylinder oil pressure quantity ratio and the average cylinder oil pressure quantity ratio of each target cylinder.
Optionally, the determining, according to the accumulated value of the actual cylinder pressure difference of each of the target cylinders and the actual single-cylinder fuel injection amount of each of the target cylinders, an average cylinder pressure-fuel amount ratio of the engine in the current fuel injection period includes:
determining a total cylinder pressure difference accumulated value of the engine in the current oil injection period according to the actual cylinder pressure difference accumulated value of each target cylinder;
determining the total fuel injection quantity of the engine in the current fuel injection period according to the actual single-cylinder fuel injection quantity of each target cylinder;
and determining the average cylinder pressure oil quantity ratio of the engine in the current oil injection period based on the total cylinder pressure difference accumulated value and the total oil injection quantity.
Optionally, before the determining the actual accumulated cylinder pressure difference value and the actual single-cylinder fuel injection amount of the target cylinder in the current fuel injection period, the method further includes:
acquiring an actual cylinder pressure value of the target cylinder in each cycle working process, and judging whether the target cylinder is in a cylinder pressure stable state or not based on the actual cylinder pressure value;
and if each target cylinder is in a cylinder pressure stable state, executing the operation of determining the actual accumulated cylinder pressure difference value and the actual single-cylinder oil injection quantity of the target cylinder in the current oil injection period.
Optionally, after the adjusting the reference fuel injection amount of each of the target cylinders in the next fuel injection period, the method further includes:
acquiring a cylinder pressing average value of each target cylinder in each cycle working process, and determining cylinder pressing deviation information between the target cylinders based on the cylinder pressing average value of each target cylinder;
and determining an oil injection adjustment factor based on the cylinder pressure deviation information, and updating the reference oil injection quantity based on the oil injection adjustment factor.
Optionally, the determining cylinder pressure deviation information between the target cylinders based on the average cylinder pressure of the target cylinders includes:
determining a reference cylinder pressure value corresponding to the engine based on the average cylinder pressure value of each target cylinder;
and for each target cylinder, determining cylinder pressure deviation information corresponding to the target cylinder based on the cylinder pressure average value of the target cylinder and the reference cylinder pressure value.
Optionally, the adjusting, according to the oil injection correction factor corresponding to each of the target cylinders, the reference oil injection amount of each of the target cylinders in the next oil injection period includes:
and for each target cylinder, calculating the target single-cylinder fuel injection quantity of the target cylinder according to the fuel injection correction factor corresponding to the target cylinder and the actual single-cylinder fuel injection quantity of the target cylinder in the current fuel injection period, and taking the target single-cylinder fuel injection quantity as the reference fuel injection quantity of the target cylinder in the next fuel injection period.
According to another aspect of the present invention, there is provided a multi-cylinder engine idle fuel injection control apparatus comprising:
the cylinder pressure oil quantity determining module is used for determining an actual cylinder pressure difference accumulated value and an actual single-cylinder oil injection quantity of each target cylinder in an engine of a target idling vehicle in a current oil injection period;
the correction factor determination module is used for determining an oil injection correction factor corresponding to each target cylinder based on the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder;
and the fuel injection quantity adjusting module is used for adjusting the reference fuel injection quantity of each target cylinder in the next fuel injection period according to the fuel injection correction factor corresponding to each target cylinder.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform a multi-cylinder engine idle fuel injection control method according to any embodiment of the present invention.
According to another aspect of the invention, a computer readable storage medium is provided, which stores computer instructions for causing a processor to implement a multi-cylinder engine idle fuel injection control method according to any one of the embodiments of the invention when executed.
According to the technical scheme of the embodiment of the invention, the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection quantity in the current oil injection period are determined for each target cylinder in the engine of the target idling vehicle, the oil injection correction factor of each target cylinder is determined according to the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection quantity of each target cylinder, and the reference oil injection quantity of each target cylinder in the next oil injection period is adjusted according to the oil injection correction factor, so that the air-fuel ratio of each cylinder is kept consistent based on the actual air intake and working conditions of each target cylinder in the current oil injection period, and the technical problem of non-uniformity of the engine caused by air intake deviation among the cylinders is solved.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1A is a schematic flow chart of a multi-cylinder engine idle speed fuel injection control method according to an embodiment of the invention;
FIG. 1B is a schematic diagram of a cylinder pressure signal curve provided in accordance with an embodiment of the present invention;
FIG. 1C is a schematic diagram of a closed-loop control according to an embodiment of the present invention;
FIG. 2A is a schematic flow chart of a multi-cylinder engine idle speed fuel injection control method according to a second embodiment of the invention;
FIG. 2B is a schematic diagram of a process for determining an injection correction factor according to a second embodiment of the present invention;
FIG. 3A is a schematic flow chart illustrating a method for controlling idle fuel injection in a multi-cylinder engine according to a third embodiment of the present invention;
FIG. 3B is a schematic diagram illustrating a process for determining an adjustment factor for fuel injection according to a third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an idle fuel injection control device for a multi-cylinder engine according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 1A is a schematic flow chart of an idle fuel injection control method for a multi-cylinder engine according to an embodiment of the present invention, which is applicable to a situation where, when a vehicle is in an idle working condition, an actual accumulated value of a cylinder pressure difference and an actual fuel injection amount of each cylinder of the vehicle in a current fuel injection period are collected in real time, and the fuel injection amount of each cylinder is adjusted according to the collected information. As shown in fig. 1A, the method includes:
and S110, determining an actual cylinder pressure difference accumulated value and an actual single-cylinder oil injection quantity of each target cylinder in the engine of the target idling vehicle in the current oil injection period.
The target idle vehicle may refer to a vehicle in an idle condition. For example, the present embodiment may collect accelerator pedal braking information, vehicle speed information, engine speed and steering wheel information of a vehicle in real time, judge whether the vehicle is in an idle working condition according to the collected information, and if so, determine that the vehicle is a target idle vehicle.
If the engine speed of the vehicle is not 0 and the vehicle speed information is 0, the vehicle can be determined to be the target idling vehicle; alternatively, if the engine speed of the vehicle is not 0 and the steering wheel information is 0, it can be determined that the vehicle is the target idling vehicle.
Specifically, for a target idle speed vehicle, an actual cylinder pressure difference accumulated value and an actual single-cylinder fuel injection quantity in a current fuel injection period of each target cylinder in an engine of the target idle speed vehicle are collected. The current injection period may be a complete injection period, such as a complete injection period after the vehicle is determined to be idling. The actual cylinder pressure difference accumulated value may be a sum of differences between the cylinder compression pressure value of the target cylinder at each time within the current injection period and the cylinder compression pressure value at the start time. For example, the initial angle of injection for the current injection period is
End angle of oil injection of
Then acquisition can continue
To
And determining an actual cylinder pressure difference accumulated value according to the cylinder compression pressure value of each oil injection angle. The actual single cylinder injection amount may be the actual injection amount of the target cylinder during the current injection period.
In the embodiment, for each target cylinder, the actual accumulated cylinder pressure difference value and the actual single-cylinder fuel injection quantity of the target cylinder in the current fuel injection period can be determined.
In an alternative embodiment, before determining the actual cylinder pressure difference accumulated value and the actual single-cylinder fuel injection quantity of each target cylinder in the current fuel injection period, whether the compression pressure of each target cylinder is stable or not can be verified, and if yes, the actual cylinder pressure difference accumulated value and the actual single-cylinder fuel injection quantity of each target cylinder are determined so as to adjust the reference fuel injection quantity of each target cylinder in the next fuel injection period.
As, before the determining the actual accumulated cylinder pressure difference value and the actual single-cylinder fuel injection amount of the target cylinder in the current fuel injection period, the method further comprises: acquiring actual cylinder pressure values of the target cylinder in each cycle working process, and judging whether the target cylinder is in a cylinder pressure stable state or not based on the actual cylinder pressure values; and if each target cylinder is in a cylinder pressure stable state, executing the operation of determining the actual accumulated cylinder pressure difference value and the actual single-cylinder oil injection quantity of the target cylinder in the current oil injection period.
Wherein the cyclic operation engineering may be an intake compression and exhaust process of the target cylinder. Specifically, for each target cylinder, the actual cylinder pressure values of the target cylinders in a preset number of working cycles are collected, and the collected actual cylinder pressure values of the target cylinders are drawn into a cylinder pressure signal curve. Illustratively, as shown in FIG. 1B, a schematic of a cylinder pressure signal curve is shown, with the abscissa representing the crank angle of the injector and the ordinate representing the compression pressure for each cylinder.
Further, whether the target cylinder is in a cylinder pressure stable state or not can be judged according to the cylinder pressure signal curve. For example, if the difference between the peak values of the respective cylinder pressure signal curves does not exceed the first threshold value, and the amount of deviation between the peak values of the respective cylinder pressure signal curves does not exceed the second threshold value, it may be determined that the respective target cylinders are in the cylinder pressure steady state.
Specifically, if each target cylinder is in a cylinder pressure stable state, it indicates that idle fuel injection adaptive adjustment can be performed on each target cylinder at this time. If a target cylinder with unstable cylinder pressure exists, the control device can send out an alarm at the moment so as to prompt that the engine of the target idling vehicle has a cylinder pressure fault.
In the optional embodiment, before determining the actual cylinder pressure difference accumulated value and the actual single-cylinder fuel injection quantity of each target cylinder in the current fuel injection period, whether all the target cylinders are in the cylinder pressure stable state or not is judged, and if yes, idle fuel injection adaptive adjustment is performed on each target cylinder, so that the state of the cylinders of the engine is verified, and idle fuel injection adaptive adjustment of the engine with unstable cylinder pressure is avoided.
And S120, determining an oil injection correction factor corresponding to each target cylinder respectively based on the accumulated value of the actual cylinder pressure difference of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder.
Specifically, after the actual cylinder pressure difference accumulated value and the actual single-cylinder fuel injection quantity of each target cylinder are determined, the fuel injection correction factor corresponding to each target cylinder can be further determined.
For example, the ratio of the accumulated value of the actual cylinder pressure difference to the actual single-cylinder fuel injection amount may be used as the fuel injection correction factor for each target cylinder.
And S130, adjusting the reference oil injection quantity of each target cylinder in the next oil injection period according to the oil injection correction factor corresponding to each target cylinder.
Specifically, after the oil injection correction factor corresponding to each target cylinder is obtained, the oil injection correction factor may be multiplied by the reference oil injection amount in the next oil injection period, and the reference oil injection amount in the next oil injection period may be updated based on the multiplication result to correct the oil injection amount of each target cylinder.
That is, the adjusting the reference fuel injection amount of each target cylinder in the next fuel injection period according to the fuel injection correction factor corresponding to each target cylinder may include: and for each target cylinder, calculating the target single-cylinder fuel injection quantity of the target cylinder according to the fuel injection correction factor corresponding to the target cylinder and the actual single-cylinder fuel injection quantity of the target cylinder in the current fuel injection period, and taking the target single-cylinder fuel injection quantity as the reference fuel injection quantity of the target cylinder in the next fuel injection period.
For example, the oil injection correction factor corresponding to the target cylinder is multiplied by the actual single-cylinder oil injection quantity corresponding to the target cylinder, the target single-cylinder oil injection quantity of the target cylinder is calculated, and the target single-cylinder oil injection quantity is determined as the reference oil injection quantity of the target cylinder in the next oil injection period.
It should be noted that the idle fuel injection control method for a multi-cylinder engine provided in this embodiment can realize fuel injection control for each cylinder under closed-loop control of the engine, and does not affect the normal closed-loop control of the air-fuel ratio of the engine. For example, as shown in fig. 1C, a closed-loop control schematic diagram is shown, where an engine of a target idle vehicle may generate a cylinder pressure signal according to an actual single-cylinder fuel injection amount of a fuel injector and a cylinder compression pressure value of each cylinder, and send the cylinder pressure signal to an electronic control unit, and further, the electronic control unit may adjust a reference fuel injection amount of a next fuel injection period according to the idle fuel injection control method of the multi-cylinder engine provided in this embodiment, and send the adjusted control information to the fuel injector, so as to implement closed-loop control. The electric control unit can be an existing control unit in a vehicle, and the acquisition of cylinder pressure signals can be realized by reserving a channel for receiving the cylinder pressure signals of the multi-cylinder engine in the electric control unit, and the cylinder pressure signals can be processed by a charge amplifier.
According to the technical scheme, an actual cylinder pressure difference accumulated value and an actual single-cylinder fuel injection quantity in a current fuel injection period are determined for each target cylinder in an engine of a target idling vehicle, fuel injection correction factors of each target cylinder are determined according to the actual cylinder pressure difference accumulated value and the actual single-cylinder fuel injection quantity of each target cylinder, and then reference fuel injection quantity of each target cylinder in the next fuel injection period is adjusted according to the fuel injection correction factors, so that each target cylinder is adjusted based on actual air intake and working conditions of each target cylinder in the current fuel injection period, air-fuel ratios of cylinders are kept consistent, and the technical problem of nonuniformity of the engine caused by air intake deviation among the cylinders is solved.
Example two
Fig. 2A is a schematic flow chart of an idle fuel injection control method for a multi-cylinder engine according to a second embodiment of the present invention, and this embodiment exemplifies a process of determining fuel injection correction factors corresponding to respective target cylinders based on the above embodiments. As shown in fig. 2A, the method includes:
s210, aiming at each target cylinder in an engine of the target idling vehicle, determining an actual cylinder pressure difference accumulated value and an actual single-cylinder oil injection quantity of the target cylinder in a current oil injection period.
S220, for each target cylinder, determining the single-cylinder pressure-oil quantity ratio of the target cylinder in the current oil injection period based on the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection quantity of the target cylinder.
The single-cylinder oil pressure quantity ratio can be the ratio of the accumulated value of the actual cylinder pressure difference to the actual single-cylinder oil injection quantity. That is, the embodiment may determine the single-cylinder pressure-oil volume ratio of the target cylinder in the current oil injection period according to the ratio between the two values after determining the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection volume of the target cylinder.
And S230, determining an average cylinder pressure-oil quantity ratio of the engine in the current oil injection period according to the actual accumulated cylinder pressure difference value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder.
The average cylinder pressure oil quantity ratio can be a ratio between the sum of the accumulated values of the actual cylinder pressure differences of all the target cylinders and the sum of the actual single-cylinder oil injection quantities of all the target cylinders. That is, the actual cylinder pressure difference accumulated values of all the target cylinders can be accumulated, the actual single-cylinder fuel injection quantities of all the target cylinders are accumulated, and the ratio of the two accumulated values is used as the average cylinder pressure-fuel quantity ratio of the engine in the current fuel injection period.
For example, the determining an average cylinder pressure oil quantity ratio of the engine in the current oil injection period according to the accumulated value of the actual cylinder pressure difference of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder comprises the following steps:
step 1: determining a total cylinder pressure difference accumulated value of the engine in the current oil injection period according to the actual cylinder pressure difference accumulated value of each target cylinder;
step 2: determining the total fuel injection quantity of the engine in the current fuel injection period according to the actual single-cylinder fuel injection quantity of each target cylinder;
and step 3: and determining the average cylinder pressure oil quantity ratio of the engine in the current oil injection period based on the total cylinder pressure difference accumulated value and the total oil injection quantity.
By the method, the determination of the average cylinder pressure oil volume ratio of all the target cylinders in the engine can be considered, so that the oil injection correction factor can be determined conveniently according to the single cylinder pressure oil volume ratio of each target cylinder and the average cylinder pressure oil volume ratio of all the target cylinders, the determined oil injection correction factor is combined with the average cylinder pressure condition of all the cylinders, and the oil injection adjustment based on the average cylinder pressure condition of all the cylinders and the actual air intake condition of each cylinder is realized.
S240, determining the oil injection correction factors corresponding to the target cylinders respectively based on the single-cylinder oil volume ratio and the average cylinder oil volume ratio of the target cylinders.
Specifically, the ratio between the single-cylinder oil pressure ratio and the average cylinder oil pressure ratio of each target cylinder may be used as the corresponding oil injection correction factor of each target cylinder.
For example, fig. 2B shows a schematic diagram of a process for determining an oil injection correction factor, which includes first, collecting actual cylinder pressure values of each target cylinder during 100 cycles, determining whether each target cylinder is in a cylinder pressure stable state, and if not, ending directly; if so, accumulating the actual cylinder pressure difference accumulated values of all the target cylinders after the oil injection initial stage of the current oil injection period, judging whether the current oil injection period is finished, if not, returning to continuously accumulate the actual cylinder pressure difference accumulated values of all the target cylinders, if so, calculating the single-cylinder oil pressure ratio of all the target cylinders, calculating the average cylinder pressure oil ratio of all the target cylinders, calculating an oil injection correction factor according to the single-cylinder oil pressure ratio and the average cylinder pressure oil ratio, and compensating the oil injection quantity of the next cycle according to the oil injection correction factor.
And S250, adjusting the reference oil injection quantity of each target cylinder in the next oil injection period according to the oil injection correction factor corresponding to each target cylinder.
According to the technical scheme of the embodiment, the single-cylinder oil pressure ratio of each target cylinder and the average cylinder pressure oil quantity ratio of all the target cylinders are calculated according to the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection quantity of each target cylinder, and then the oil injection correction factor of each target cylinder is calculated respectively according to the single-cylinder oil pressure ratio of each target cylinder and the average cylinder pressure oil quantity ratio of all the target cylinders, so that the oil injection correction based on the actual air intake condition of each target cylinder is realized, the air-fuel ratios among all the target cylinders are kept consistent by adjusting the oil injection quantity of each cylinder, and the non-uniformity of an engine caused by air intake deviation among all the cylinders is avoided.
EXAMPLE III
Fig. 3A is a schematic flow chart of an idle fuel injection control method for a multi-cylinder engine according to a third embodiment of the present invention, and in this embodiment, based on the above embodiments, after the reference fuel injection amount of each target cylinder in the next fuel injection period is adjusted, the reference fuel injection amount is continuously adjusted according to the cylinder pressure difference between cylinders. As shown in fig. 3A, the method includes:
s310, for each target cylinder in an engine of the target idling vehicle, determining an actual accumulated cylinder pressure difference value and an actual single-cylinder oil injection quantity of the target cylinder in a current oil injection period.
And S320, determining an oil injection correction factor corresponding to each target cylinder respectively based on the accumulated value of the actual cylinder pressure difference of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder.
S330, adjusting the reference fuel injection quantity of each target cylinder in the next fuel injection period according to the fuel injection correction factor corresponding to each target cylinder.
S340, acquiring a cylinder pressing average value of each target cylinder in each cycle working process, and determining cylinder pressing deviation information between the target cylinders based on the cylinder pressing average value of each target cylinder.
Wherein the cylinder average pressure may be an average value of the compression pressure of the target cylinder during the entire cycle operation. For example, a cylinder average value of each target cylinder may be calculated based on the collected information for the compression pressures during 100 cycles of operation for all the target cylinders.
Further, the cylinder pressure deviation information between the target cylinders is determined based on the cylinder pressure average value of each target cylinder, and a difference value between the cylinder pressure average values of any two target cylinders may be used as the cylinder pressure deviation information.
Or, the determining the cylinder pressure deviation information between the target cylinders based on the cylinder pressure average value of each of the target cylinders may further include: determining a reference cylinder pressure value corresponding to the engine based on the average cylinder pressure value of each target cylinder; and for each target cylinder, determining cylinder pressure deviation information corresponding to the target cylinder based on the cylinder pressure average value of the target cylinder and the reference cylinder pressure value.
The reference cylinder pressure value may be an average of the cylinder pressure averages of all the target cylinders, that is, a total average of the compression pressures of all the target cylinders. Specifically, after the reference cylinder pressure value is calculated, for each target cylinder, the cylinder pressure average value of the target cylinder and the reference cylinder pressure value may be determined as the cylinder pressure deviation information corresponding to the target cylinder.
And S350, determining an oil injection adjusting factor based on the cylinder pressure deviation information, and updating the reference oil injection quantity based on the oil injection adjusting factor.
Specifically, the cylinder pressure deviation information can be directly determined as the fuel injection adjustment factor. Or, whether the cylinder pressure deviation information exceeds a preset threshold value or not can be judged, and if yes, the cylinder pressure deviation information is determined as an oil injection adjustment factor. If the cylinder pressure deviation information exceeds 20%, determining the cylinder pressure deviation information as an oil injection adjustment factor if the cylinder pressure deviation information exceeds 20%
In the present embodiment, the reference fuel injection amount adjusted according to the fuel injection correction factor is adjusted again by the fuel injection adjustment factor. For example, the injection adjustment factor may be multiplied by a reference injection quantity adjusted by the injection correction factor.
For example, referring to fig. 3B, fig. 3B shows a schematic diagram of a determination process of an oil injection adjustment factor, after determining an oil injection correction factor and adjusting a reference oil injection amount of each target cylinder in a next oil injection period according to the oil injection correction factor, acquiring actual cylinder pressure values of each target cylinder in 100 cycles of operation, calculating a reference cylinder pressure value and a cylinder average pressure value of each target cylinder, calculating a ratio between the cylinder average pressure value and the reference cylinder pressure value, determining whether the ratio exceeds 20%, and if so, determining the ratio as the oil injection adjustment factor to continuously adjust the reference oil injection amount based on the oil injection adjustment factor.
According to the technical scheme, the average cylinder pressure value of each target cylinder in each cycle working process is obtained, the cylinder pressure deviation information between each target cylinder is determined according to the average cylinder pressure value of each target cylinder, the oil injection adjusting factor for readjusting the reference oil injection quantity is determined according to the cylinder pressure deviation information, whether the adjustment of the reference oil injection quantity is reasonable or not is determined according to the actual cylinder pressure difference distance between each cylinder, the adjustment of the oil injection quantity of each cylinder based on the actual cylinder pressure difference between each cylinder is achieved, the reasonability of the finally determined oil injection quantity is improved, and the condition that the idling of an engine is not uniform is further avoided.
Example four
FIG. 4 is a schematic structural diagram of an idle fuel injection control device for a multi-cylinder engine according to a fourth embodiment of the present invention. As shown in FIG. 4, the apparatus includes a cylinder charge determination module 410, a correction factor determination module 420, and a fuel injection adjustment module 430.
The cylinder pressure oil quantity determining module 410 is used for determining an actual cylinder pressure difference accumulated value and an actual single-cylinder oil injection quantity of each target cylinder in an engine of a target idling vehicle in a current oil injection period;
a correction factor determination module 420, configured to determine an oil injection correction factor corresponding to each of the target cylinders based on the actual accumulated cylinder pressure difference values of the target cylinders and the actual single-cylinder oil injection amount of the target cylinders;
and the fuel injection quantity adjusting module 430 is configured to adjust the reference fuel injection quantity of each target cylinder in the next fuel injection period according to the fuel injection correction factor corresponding to each target cylinder.
According to the technical scheme of the embodiment, the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection quantity in the current oil injection period are determined for each target cylinder in the engine of the target idling vehicle, the oil injection correction factor of each target cylinder is determined according to the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection quantity of each target cylinder, and the reference oil injection quantity of each target cylinder in the next oil injection period is adjusted according to the oil injection correction factor, so that each target cylinder is adjusted based on the actual air intake and working conditions of each target cylinder in the current oil injection period, the air-fuel ratio among the cylinders is kept consistent, and the technical problem of non-uniformity of the engine caused by air intake deviation among the cylinders is solved.
On the basis of the above embodiment, optionally, the modification factor determining module 420 includes a first determining unit, a second determining unit and a factor calculating unit, wherein;
the first determining unit is used for determining the single-cylinder oil pressure-oil volume ratio of the target cylinder in the current oil injection period based on the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection volume of the target cylinder for each target cylinder;
the second determining unit is used for determining the average cylinder pressure oil quantity ratio of the engine in the current oil injection period according to the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder;
and the factor calculation unit is used for determining the oil injection correction factor corresponding to each target cylinder based on the single-cylinder oil volume ratio and the average cylinder oil volume ratio of each target cylinder.
On the basis of the foregoing embodiment, optionally, the second determining unit is specifically configured to:
determining a total cylinder pressure difference accumulated value of the engine in the current oil injection period according to the actual cylinder pressure difference accumulated value of each target cylinder; determining the total fuel injection quantity of the engine in the current fuel injection period according to the actual single-cylinder fuel injection quantity of each target cylinder; and determining the average cylinder pressure oil quantity ratio of the engine in the current oil injection period based on the total cylinder pressure difference accumulated value and the total oil injection quantity.
On the basis of the above embodiment, optionally, the apparatus further includes a stability verification module, configured to obtain an actual cylinder pressure value of the target cylinder in each cycle working process, and determine whether the target cylinder is in a cylinder pressure stable state based on the actual cylinder pressure value; and if each target cylinder is in a cylinder pressure stable state, executing the operation of determining the actual accumulated cylinder pressure difference value and the actual single-cylinder oil injection quantity of the target cylinder in the current oil injection period.
On the basis of the above embodiment, optionally, the apparatus further includes an oil injection amount verification module, where the oil injection amount verification module is configured to obtain a cylinder pressure average value of each target cylinder in each cycle working process, and determine cylinder pressure deviation information between the target cylinders based on the cylinder pressure average value of each target cylinder; and determining an oil injection adjustment factor based on the cylinder pressure deviation information, and updating the reference oil injection quantity based on the oil injection adjustment factor.
On the basis of the foregoing embodiment, optionally, the fuel injection amount verification module includes a deviation determination unit, and the deviation determination unit is configured to determine a reference cylinder pressure value corresponding to the engine based on a cylinder pressure average value of each of the target cylinders; and for each target cylinder, determining cylinder pressure deviation information corresponding to the target cylinder based on the cylinder pressure average value of the target cylinder and the reference cylinder pressure value.
On the basis of the foregoing embodiment, optionally, the fuel injection amount adjusting module 430 is specifically configured to:
and for each target cylinder, calculating the target single-cylinder fuel injection quantity of the target cylinder according to the fuel injection correction factor corresponding to the target cylinder and the actual single-cylinder fuel injection quantity of the target cylinder in the current fuel injection period, and taking the target single-cylinder fuel injection quantity as the reference fuel injection quantity of the target cylinder in the next fuel injection period.
The idle speed fuel injection control device of the multi-cylinder engine, provided by the embodiment of the invention, can execute the idle speed fuel injection control method of the multi-cylinder engine, and has corresponding functional modules and beneficial effects of the execution method.
EXAMPLE five
Fig. 5 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present invention. The electronic device 10 is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 5, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 can perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from a storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the operation of the electronic apparatus 10 may also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
A number of components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. The processor 11 executes the various methods and processes described above, such as a multi-cylinder engine idle fuel injection control method.
In some embodiments, the multi-cylinder engine idle fuel injection control method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the multi-cylinder engine idle fuel injection control method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to execute a multi-cylinder engine idle fuel injection control method by any other suitable means (e.g., by way of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
The computer program for implementing the multi-cylinder engine idle fuel injection control method of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.
Example six
An embodiment of the present invention further provides a computer-readable storage medium storing computer instructions for causing a processor to execute a method for controlling idle fuel injection of a multi-cylinder engine, the method including:
determining an actual cylinder pressure difference accumulated value and an actual single-cylinder oil injection quantity of each target cylinder in an engine of a target idling vehicle in a current oil injection period;
determining an oil injection correction factor corresponding to each target cylinder respectively based on the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder;
and adjusting the reference oil injection quantity of each target cylinder in the next oil injection period according to the oil injection correction factor corresponding to each target cylinder.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An idle speed fuel injection control method for a multi-cylinder engine is characterized by comprising the following steps:
determining an actual cylinder pressure difference accumulated value and an actual single-cylinder oil injection quantity of each target cylinder in an engine of a target idling vehicle in a current oil injection period;
determining an oil injection correction factor corresponding to each target cylinder respectively based on the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder;
adjusting the reference oil injection quantity of each target cylinder in the next oil injection period according to the oil injection correction factor corresponding to each target cylinder;
the determining of the oil injection correction factor corresponding to each target cylinder respectively based on the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder comprises:
for each target cylinder, determining the single-cylinder pressure-oil quantity ratio of the target cylinder in the current oil injection period based on the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection quantity of the target cylinder;
determining the average cylinder pressure-oil quantity ratio of the engine in the current oil injection period according to the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder; the average cylinder pressure oil quantity ratio is the ratio of the sum of the accumulated values of the actual cylinder pressure differences of all the target cylinders to the sum of the actual single-cylinder oil injection quantities of all the target cylinders;
and determining the oil injection correction factor corresponding to each target cylinder respectively based on the single-cylinder oil pressure quantity ratio and the average cylinder oil pressure quantity ratio of each target cylinder.
2. The method of claim 1, wherein determining an average cylinder pressure-fuel ratio of the engine in the current fuel injection period according to the accumulated value of the actual cylinder pressure difference of each target cylinder and the actual single-cylinder fuel injection quantity of each target cylinder comprises:
determining a total cylinder pressure difference accumulated value of the engine in the current oil injection period according to the actual cylinder pressure difference accumulated value of each target cylinder;
determining the total fuel injection quantity of the engine in the current fuel injection period according to the actual single-cylinder fuel injection quantity of each target cylinder;
and determining the average cylinder pressure oil quantity ratio of the engine in the current oil injection period based on the total cylinder pressure difference accumulated value and the total oil injection quantity.
3. The method of claim 1, wherein prior to said determining an actual accumulated cylinder pressure difference value and an actual single cylinder injection quantity for said target cylinder during a current injection cycle, said method further comprises:
acquiring actual cylinder pressure values of the target cylinder in each cycle working process, and judging whether the target cylinder is in a cylinder pressure stable state or not based on the actual cylinder pressure values;
and if each target cylinder is in a cylinder pressure stable state, executing the operation of determining the actual accumulated cylinder pressure difference value and the actual single-cylinder oil injection quantity of the target cylinder in the current oil injection period.
4. The method of claim 1, further comprising, after said adjusting the reference injection quantity for each of the target cylinders in a next injection cycle:
acquiring a cylinder pressing average value of each target cylinder in each cycle working process, and determining cylinder pressing deviation information between the target cylinders based on the cylinder pressing average value of each target cylinder;
and determining an oil injection adjustment factor based on the cylinder pressure deviation information, and updating the reference oil injection quantity based on the oil injection adjustment factor.
5. The method of claim 4, wherein determining cylinder pressure deviation information between the target cylinders based on the cylinder pressure mean of the target cylinders comprises:
determining a reference cylinder pressure value corresponding to the engine based on the average cylinder pressure value of each target cylinder;
and for each target cylinder, determining cylinder pressure deviation information corresponding to the target cylinder based on the cylinder pressure average value of the target cylinder and the reference cylinder pressure value.
6. The method of claim 1, wherein the adjusting the reference fuel injection amount of each target cylinder in the next fuel injection period according to the fuel injection correction factor corresponding to each target cylinder comprises:
and for each target cylinder, calculating the target single-cylinder fuel injection quantity of the target cylinder according to the fuel injection correction factor corresponding to the target cylinder and the actual single-cylinder fuel injection quantity of the target cylinder in the current fuel injection period, and taking the target single-cylinder fuel injection quantity as the reference fuel injection quantity of the target cylinder in the next fuel injection period.
7. An idle fuel injection control device for a multi-cylinder engine, comprising:
the cylinder oil pressure quantity determining module is used for determining an actual cylinder pressure difference accumulated value and an actual single-cylinder oil injection quantity of each target cylinder in an engine of a target idling vehicle in a current oil injection period;
the correction factor determination module is used for determining an oil injection correction factor corresponding to each target cylinder based on the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder;
the fuel injection quantity adjusting module is used for adjusting the reference fuel injection quantity of each target cylinder in the next fuel injection period according to the fuel injection correction factor corresponding to each target cylinder;
the correction factor determining module comprises a first determining unit, a second determining unit and a factor calculating unit;
the first determining unit is used for determining the single-cylinder oil pressure-oil volume ratio of the target cylinder in the current oil injection period based on the actual cylinder pressure difference accumulated value and the actual single-cylinder oil injection volume of the target cylinder for each target cylinder;
the second determining unit is used for determining the average cylinder pressure oil quantity ratio of the engine in the current oil injection period according to the actual cylinder pressure difference accumulated value of each target cylinder and the actual single-cylinder oil injection quantity of each target cylinder; the average cylinder pressure oil quantity ratio is the ratio of the sum of the accumulated values of the actual cylinder pressure differences of all the target cylinders to the sum of the actual single-cylinder oil injection quantities of all the target cylinders;
and the factor calculation unit is used for determining the oil injection correction factor corresponding to each target cylinder based on the single-cylinder oil volume ratio and the average cylinder oil volume ratio of each target cylinder.
8. An electronic device, characterized in that the electronic device comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the multi-cylinder engine idle fuel injection control method of any one of claims 1-6.
9. A computer readable storage medium characterized in that it stores computer instructions for causing a processor to carry out a method of controlling idle fuel injection in a multi-cylinder engine according to any one of claims 1 to 6 when executed.
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| CN202210566283.0A CN114738131B (en) | 2022-05-23 | 2022-05-23 | Method, device, equipment and medium for controlling idle speed oil injection of multi-cylinder engine |
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| CN202210566283.0A CN114738131B (en) | 2022-05-23 | 2022-05-23 | Method, device, equipment and medium for controlling idle speed oil injection of multi-cylinder engine |
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| DE102006015503A1 (en) * | 2006-03-31 | 2007-10-04 | Fev Motorentechnik Gmbh | Method for control of injection process of directly fuel injected internal combustion engine is implemented in such way that change of injection process is effected on basis of parameter recorded during first working cycle |
| JP5026337B2 (en) * | 2008-05-21 | 2012-09-12 | 日立オートモティブシステムズ株式会社 | Control device for multi-cylinder internal combustion engine |
| US8360030B2 (en) * | 2010-03-17 | 2013-01-29 | GM Global Technology Operations LLC | Idle speed reduction systems and methods |
| CN106150719B (en) * | 2015-04-28 | 2019-05-31 | 长城汽车股份有限公司 | Control method, system and the vehicle of engine |
| CN110173365B (en) * | 2019-06-29 | 2022-08-02 | 潍柴动力股份有限公司 | Method and system for balancing oil injection quantity of cylinders of engine |
| CN110925110B (en) * | 2019-12-13 | 2022-08-23 | 潍柴动力股份有限公司 | Engine idling control method, device and storage medium |
| CN111706440B (en) * | 2020-06-22 | 2022-11-22 | 浙江吉利新能源商用车集团有限公司 | Control method and system for engine and vehicle |
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