CN116255267A - Fuel injection control method, control device, vehicle, storage and processor - Google Patents
Fuel injection control method, control device, vehicle, storage and processor Download PDFInfo
- Publication number
- CN116255267A CN116255267A CN202310408775.1A CN202310408775A CN116255267A CN 116255267 A CN116255267 A CN 116255267A CN 202310408775 A CN202310408775 A CN 202310408775A CN 116255267 A CN116255267 A CN 116255267A
- Authority
- CN
- China
- Prior art keywords
- injection
- pulse width
- sampling period
- engine
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
-
- 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
-
- 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 embodiment of the invention provides an oil injection control method, a control device, a vehicle, a memory and a processor, wherein the oil injection control method comprises the following steps: acquiring the injection pulse width of each injection in the current sampling period; calculating the average injection pulse width in the current sampling period; determining that the average injection pulse width is in a nonlinear injection interval; the number of injections within a single engine operating cycle is reduced. According to the oil injection control method, the mode that the average injection pulse width in the sampling period is in the nonlinear injection interval is determined, the injection pulse width of the current oil injector can cause large oil injection dispersion of the oil injector, and further the duration of the oil injection pulse width in the subsequent sampling period is increased by reducing the oil injection times in the single engine working cycle, so that the probability that the subsequent oil injection pulse width is separated from the nonlinear injection interval is increased, the fuel combustion efficiency is improved, the probability of shaking of the engine speed is reduced, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an oil injection control method, a control device, a vehicle, a memory and a processor.
Background
Engines employing GDI (Gasoline Direct Injection engine, direct fuel injection) technology have the advantage of improved combustion efficiency and reduced pollutant emissions.
In the related art, the fuel injector of the GDI engine is generally injected for a plurality of times at different intervals in an intake stroke and a compression stroke in an engine working cycle, thereby achieving the purposes of further improving the combustion efficiency of the engine, reducing the emissions of the engine, and improving the performance output of the engine.
The duration of single fuel injection of the fuel injector is the injection pulse width, and the duration of the injection pulse width is in a continuously changing state to adapt to the changes of factors such as rotating speed, load and the like in the process of an engine.
However, the fuel injector is limited by the structural characteristics of the fuel injector, when the injection pulse width time of the fuel injector is too short, the fuel injector cannot realize linear fuel injection, so that the fuel quantity actually injected into a cylinder by the fuel injector is difficult to control, further the problems of deterioration of combustion in the cylinder, fluctuation of the engine rotating speed and the like are caused, the engine is dithered, the normal operation and the service life of the engine are not facilitated, and the user experience is also adversely affected.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an injection control method, a control device, a vehicle, a memory, and a processor that can reduce the chance of chattering during engine injection.
In order to achieve the above purpose, the technical solution of the embodiments of the present application is implemented as follows:
the embodiment of the invention provides an oil injection control method, which comprises the following steps:
acquiring the injection pulse width of each injection in the current sampling period;
calculating the average injection pulse width in the current sampling period;
determining that the average injection pulse width is in a nonlinear injection interval;
the number of injections within a single engine operating cycle is reduced.
In some embodiments, the determining that the average injection pulse width is in a nonlinear injection interval specifically includes:
the average injection pulse width is determined to be less than 0.5ms.
In some embodiments, after said determining that said average injection pulse width is in a non-linear injection interval, said fuel injection control method further comprises:
and determining that the engine is subjected to rotational speed jitter.
In some embodiments, the determining that the engine is subject to rotational speed jittering specifically includes:
acquiring the average jet pulse width in the previous sampling period;
and determining that the difference value between the average injection pulse width in the current sampling period and the average injection pulse width in the previous sampling period is larger than a first preset fluctuation duration.
In some embodiments, the value range of the first preset fluctuation time period is 0.05ms to 0.15ms.
In some embodiments, the determining that the engine is subject to rotational speed jittering specifically includes:
acquiring the injection interval between every two adjacent injection pulse widths in the current sampling period;
calculating the average injection interval in the current sampling period;
acquiring the average injection interval in the previous sampling period;
and determining that the difference value between the average injection interval in the current sampling period and the average injection interval in the previous sampling period is larger than a second preset fluctuation duration.
In some embodiments, the value range of the second preset fluctuation time period is 0.05ms to 0.15ms.
In some embodiments, before said reducing the number of injections in a single engine operating cycle, the injection control method further comprises:
acquiring a target rotating speed and an actual rotating speed of a current engine;
and determining that the difference between the target rotating speed and the actual rotating speed is larger than a preset rotating speed difference.
In some embodiments, the preset rotational speed difference value ranges from 40rpm to 60rpm.
In some embodiments, after said reducing the number of injections in a single engine operating cycle, the injection control method further comprises:
determining that the average injection pulse width in the current sampling period is in a linear injection interval;
and adjusting the number of oil injection times in the working cycle of the single engine to the required number of times.
The embodiment of the invention also provides a control device, which comprises:
the acquisition unit is used for acquiring the injection pulse width of each injection in the current sampling period;
a calculating unit, configured to calculate an average injection pulse width in the current sampling period;
a determining unit, configured to determine that the average injection pulse width is in a nonlinear injection interval;
and the control unit is used for controlling the oil injection times in the working cycle of the single engine.
The embodiment of the invention also provides a vehicle, which comprises:
the engine comprises an oil sprayer and an engine cylinder body, wherein a fuel oil channel is arranged in the oil sprayer, a combustion chamber is arranged in the engine cylinder body, and the fuel oil channel is selectively communicated with the combustion chamber;
the control device of the foregoing embodiment, wherein the control device is electrically connected to the fuel injector.
The embodiment of the invention also provides a memory, which comprises a stored program, wherein the equipment where the memory is controlled to execute the fuel injection control method according to any one of the previous embodiments when the program runs.
The embodiment of the invention also provides a processor, which is used for running a program, wherein the fuel injection control method in any one of the previous embodiments is executed when the program runs.
According to the oil injection control method, the mode that the average injection pulse width in the sampling period is in the nonlinear injection interval is determined, the injection pulse width of the current oil injector can cause large oil injection dispersion difference of the oil injector, the oil injection times in a single engine working cycle are further reduced, the duration of the oil injection pulse width in the subsequent sampling period is increased, the probability that the subsequent oil injection pulse width is separated from the nonlinear injection interval is increased, the oil injection pulse width and the flow of the oil injector are restored to the linear relation, the oil quantity injected by the oil injector in the oil injection pulse width is better accurately obtained, the matching property between the oil quantity injected by the oil injector in the oil injection pulse width and the specific working condition of the engine is better improved, the fuel combustion efficiency is better improved, the probability of shaking of the engine speed is reduced, and the user experience is better.
Drawings
FIG. 1 is a flow chart of a fuel injection control method according to an embodiment of the invention;
FIG. 2 is a schematic block diagram of a control device according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a vehicle in an embodiment of the invention.
Description of the reference numerals
A control device 10; an acquisition unit 11; a calculation unit 12; a determination unit 13; a control unit 14; an engine 20; an engine block 21; an injector 22; vehicle 30
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and technical features in the embodiments may be combined with each other, and the detailed description in the specific embodiments should be interpreted as an explanation of the gist of the present application and should not be construed as undue limitation to the present application.
An embodiment of the present invention provides a fuel injection control method for controlling a fuel injector 22 in an engine 20.
Referring to fig. 1, the fuel injection control method includes the steps of:
s1: and acquiring the injection pulse width of each injection in the current sampling period.
The sampling period refers to a preset length of unit time, and data information related to the operation of the injector 22, such as the injection pulse width, the injection amount, the injection pressure, etc., of the injector 22 is acquired only during the sampling period.
The specific duration of the sampling period is not limited, e.g., 10ms (millisecond ), 20ms, 30ms, etc.
Each sampling period may be spaced at the same time or may be spaced at different times.
It will be appreciated that the sampling period is at a stage during operation of engine 20 where fuel injection by fuel injector 22 is desired.
Taking four-stroke engine 20 as an example, the sampling period is in the intake stroke phase and the compression stroke phase, while the sampling period is not set in the power stroke phase and the exhaust stroke phase. The intake stroke and the compression stroke are two consecutive working strokes, and thus a plurality of sampling periods can be set in these two stroke phases.
The number of times the fuel injection operation is performed by the fuel injector 22 per sampling period is not limited, such as 1, 2, 3, etc.
The injection pulsewidth refers to the length of time that fuel is injected during each injection event by the injector 22.
It will be appreciated that as the operating conditions of engine 20 change, the injection pulsewidth of each injection by injector 22 also changes
It should be noted that, the injection pulse width of each injection of the injector 22 depends on the required rotation speed, the injection pressure, the injection angle, and other factors of the engine 20, and the specific control strategy and calibration method of the injection pulse width of each injection are already applied in the related art, and are not described herein.
S2: an average injection pulse width over the current sampling period is calculated.
The number of injections in the current sampling period is n, and the average injection pulseWidth t a The pulse width of the first injection is t 1 The pulse width of the second injection is t 2 By analogy, the nth injection pulse width is t n The average injection pulse width is t a Calculated according to the following relation:
t a ＝(t 1 +t 2 +……+t n )/n
it will be appreciated that a larger injection pulse width indicates a longer time for each opening of the fuel injector 22, and that the cylinder of the engine 20 will have a more intense mixture of fuel and air; the smaller the injection pulsewidth, the shorter the time that the injector 22 will open each injection, and the more lean the fuel and air mixture will be in the cylinder of the engine 20.
S3: the average injection pulse width is determined to be in the nonlinear injection interval.
The nonlinear injection interval refers to when the injection pulsewidth of the injector 22 is within the period of time, the relationship between the flow rate of the injector 22 and the injection pulsewidth is not linear, and it is difficult to determine the flow rate of the injector 22 in the injection pulsewidth.
Whether the single injection pulse width is in the nonlinear injection interval or not is judged based on the average injection pulse width, so that adverse effects on final injection control caused by the fact that the single injection pulse width is in the nonlinear injection interval due to accidental factors such as vibration and sensor errors in the sampling period can be reduced.
S4: the number of injections within a single engine 20 operating cycle is reduced.
The engine 20 duty cycle refers to the process of the engine 20 completing work from intake to exhaust once. For example, four-stroke engine 20 includes an intake stroke phase, a compression stroke phase, a power stroke phase, and an exhaust stroke phase.
In the case where the amount of fuel required for operation of engine 20 is a constant value, the flow rate of injector 22 is a constant value, and the fuel pressure in the fuel passage in injector 22 is a constant value, the injection pulsewidth of injector 22 can be increased by decreasing the number of injections in a single engine 20 operating cycle.
According to the fuel injection control method in the embodiment of the invention, by determining that the average injection pulse width in the sampling period is in the nonlinear injection interval, the injection pulse width of the current fuel injector 22 is determined to cause large fuel injection dispersion of the fuel injector 22, and further by reducing the fuel injection times in the working cycle of the single engine 20, the duration of the injection pulse width in the subsequent sampling period is increased to increase the probability that the subsequent injection pulse width is separated from the nonlinear injection interval, so that the linear relation between the injection pulse width and the flow of the fuel injector 22 is restored, the fuel quantity injected by the fuel injector 22 in the injection pulse width is better obtained, the matching property between the fuel quantity injected by the fuel injector 22 in the injection pulse width and the specific working condition of the engine 20 is better improved, the fuel combustion efficiency is better improved, the probability of shaking of the rotating speed of the engine 20 is reduced, and the user experience is improved.
The specific number of injections within a single engine 20 operating cycle is not limited, e.g., 1, 2, 3, etc., and the number of demands to accommodate may be flexibly adjusted based on the specific operating conditions of the engine 20 during the linear injection interval.
It should be noted that, a specific method for determining the number of times of fuel injection required in a single working cycle of the engine 20 according to the working condition of the engine 20 is already applied in the related art, and will not be described herein.
It will be appreciated that during operation of the engine 20, the rotational speed of the engine 20 will also change continuously as the load of the engine 20 changes as the vehicle 30 travels, with the sampling period being a predetermined fixed value. Thus, there may be only a single engine 20 duty cycle per sample period, there may be multiple engine 20 duty cycles, or there may be multiple sample periods within a single engine 20 duty cycle. Likewise, there may be only a single injection pulse width per sampling period, or there may be multiple injection pulse widths.
In some embodiments, the duration of the interval between two adjacent sampling periods is less than the duration of either sampling period within the same engine 20 duty cycle, thereby increasing the number of sampling periods within a single engine 20 duty cycle and reducing the chance of missing injection pulse widths in the non-linear injection interval.
It will be appreciated that different configurations of the injector 22 have different non-linear injection intervals.
In some embodiments, determining that the average injection pulse width is in a non-linear injection interval specifically includes:
the average injection pulse width is determined to be less than 0.5ms. That is, the nonlinear injection interval ranges from 0 to 0.5ms. When the average injection pulse width is less than 0.5ms, it is indicated that the average injection pulse width is in the nonlinear injection interval.
It should be noted that, the non-linear injection interval of the injector 22 is determined by a test, and the method steps, the detecting instrument, the testing environment, etc. adopted in the test are already applied in the related art, and are not described herein.
It will be appreciated that, because the working conditions of the engine 20 are dynamically changed, parameters such as the number of injections, the injection angle, the injection time interval, etc. of the injector 22 in the working cycle of the single engine 20 need to be optimally matched according to factors such as fuel efficiency and fuel supply under different working conditions of the engine 20, and therefore, the average injection pulse width in each sampling period is also continuously changed.
It should be noted that, the method of specifically optimizing the parameters of the fuel injector 22 according to the working condition of the engine 20 is already applied in the related art, and will not be described herein.
It will be appreciated that there is a difference between the acquired injection pulse widths due to the influence of external sporadic environmental factors such as vibration and measurement errors present in the data detection itself. Thus, even under the same engine 20 conditions, there may be differences in average injection pulsewidth over different sampling periods.
It will be appreciated that in the case where the average injection pulse width is in the non-linear injection interval, it does not mean that all injection pulse widths within the sampling period are in the non-linear injection interval. Therefore, the rotational speed of the engine 20 is not necessarily caused to shake during the sampling period.
In some embodiments, the fuel injection control method further includes, prior to reducing the number of fuel injections within a single engine 20 operating cycle:
it is determined that engine 20 is rotating at a jerk.
After the average injection pulse width is in the nonlinear injection interval, the injected oil quantity may just meet the requirement of the current working condition of the engine 20 even though the injection dispersion difference is large, so in order to reduce the potential adverse effect on the working condition of the engine 20 caused by reducing the number of injection times in the working cycle of the single engine 20, it is required to determine that the number of injection times in the working cycle of the single engine 20 is reduced after the engine 20 is subjected to rotational speed shaking.
The method of determining the occurrence of rotational shake of the engine 20 is not limited.
If the difference between the average injection pulse widths in different sampling periods is smaller, the change of the rotation speed of the engine 20 is smaller, and the probability of the rotation speed shaking of the engine 20 is smaller; otherwise, it is indicated that the engine 20 has a high probability of occurrence of rotational speed hunting.
In some embodiments, after determining that the average injection pulse width is in the non-linear injection interval, the fuel injection control method further comprises:
acquiring an average injection pulse width in a previous sampling period;
and determining that the difference value between the average injection pulse width in the current sampling period and the average injection pulse width in the previous sampling period is larger than a first preset fluctuation duration.
That is, on the basis of determining that the average injection pulse width in the current sampling period is in the nonlinear injection interval, it is necessary to further satisfy the condition that the difference between the average injection pulse width in the current sampling period and the average injection pulse width in the previous sampling period is greater than the first preset fluctuation period, in order to perform the operation of reducing the number of injections in the single engine 20 duty cycle.
Since the time of each sampling period is short, the variation of the operating condition of the engine 20 in the time range of two adjacent sampling periods is small, and the average injection pulse width in the current sampling period is compared with the average injection pulse width in the previous sampling period. If the difference value of the two is smaller than or equal to the first preset fluctuation duration, it is indicated that the fluctuation of the average injection pulse width in two adjacent sampling periods may be caused by measurement errors, external sporadic environmental factors and other reasons, and the fluctuation of the rotation speed of the engine 20 is indirectly reflected, so that in order to reduce the influence on the working condition of the engine 20, no further measures are taken on the injection times in the working cycle of the single engine 20; if the difference value between the two is less than or equal to the first preset fluctuation duration, it is indicated that the fluctuation of the average injection pulse width in two adjacent sampling periods is caused by the fluctuation of the working condition of the engine 20, which indirectly reflects the fluctuation of the rotation speed of the engine 20, and further measures are needed to be taken for the injection frequency in the single engine 20 working cycle to inhibit the fluctuation of the rotation speed of the engine 20, namely, the injection frequency in the single engine 20 working cycle is reduced.
It will be appreciated that the first predetermined duration of the fluctuation is less than the injection pulse width.
The specific range of values of the first preset fluctuation period is not limited, and values are taken according to specific parameters of the engine 20.
In some embodiments, the first preset ripple time period has a value ranging from 0.05ms to 0.15ms.
The specific value of the first preset fluctuation time period is not limited, for example, 0.05ms, 0.1ms, 0.15ms, etc.
It will be appreciated that the parameters of the injector 22 are also constantly optimally matched due to the constantly changing operating conditions of the engine 20. Thus, the duration of the injection interval between two adjacent injection pulse widths also varies continuously.
If the time interval between the average injection pulse widths in different sampling periods is relatively uniform, it indicates that the engine 20 has a relatively low probability of rotating speed jitter.
In some embodiments, after determining that the average injection pulse width is in the non-linear injection interval, the fuel injection control method further comprises:
acquiring the injection interval between every two adjacent injection pulse widths in the current sampling period;
calculating an average injection interval in the current sampling period;
acquiring an average injection interval in a previous sampling period;
and determining that the difference value between the average injection interval in the current sampling period and the average injection interval in the previous sampling period is greater than a second preset fluctuation duration.
That is, on the basis of determining that the average injection pulse width in the current sampling period is in the nonlinear injection interval, it is necessary to further satisfy the condition that the difference between the average injection interval in the current sampling period and the average injection interval in the preceding sampling period is greater than the second preset fluctuation period, in order to perform the operation of reducing the number of injections in the single engine 20 duty cycle.
The average injection pulse width in the current sampling period is compared with the average injection pulse width in the previous sampling period. If the difference value of the two is less than or equal to the second preset fluctuation duration, the fact that the fluctuation of the rotating speed of the engine 20 does not occur is indirectly reflected, and in order to reduce the influence on the working condition of the engine 20, no further measures are taken on the oil injection times in the working cycle of the single engine 20; if it is determined that the difference between the two is greater than the second preset fluctuation duration, the occurrence of fluctuation of the rotation speed of the engine 20 is indirectly reflected, and further measures are taken for the number of fuel injection in the single engine 20 working cycle to suppress the fluctuation of the rotation speed of the engine 20, that is, to reduce the number of fuel injection in the single engine 20 working cycle.
It is understood that the second preset wave length is smaller than the injection interval.
The specific range of values of the second preset fluctuation period is not limited, and values are taken according to specific parameters of the engine 20.
In some embodiments, the second preset duration of fluctuation ranges from 0.05ms to 0.15ms.
The specific value of the second preset fluctuation period is not limited, for example, 0.05ms, 0.1ms, 0.15ms, etc.
It will be appreciated that there is some distortion that indirectly reflects fluctuations in the rotational speed of the engine 20.
In some embodiments, the fuel injection control method further includes, prior to reducing the number of fuel injections within a single engine 20 operating cycle:
acquiring a target rotation speed and an actual rotation speed of the current engine 20;
and determining that the difference between the target rotating speed and the actual rotating speed is larger than the preset rotating speed difference.
The target rotational speed, that is, the rotational speed that the crankshaft of the engine 20 needs to output in order to theoretically secure the current running state of the vehicle 30. The actual rotational speed, i.e., the rotational speed actually output by the crankshaft of the engine 20. If the difference between the target rotation speed and the actual rotation speed is smaller than or equal to the preset rotation speed difference, the difference between the target rotation speed and the actual rotation speed is mainly caused by measurement errors, rotation resistance of the engine 20 and other reasons; if the difference between the target rotation speed and the actual rotation speed is greater than the preset rotation speed difference, it is indicated that the average injection pulse width is in the nonlinear injection interval, so as to cause the rotation speed of the engine 20 to shake.
In some embodiments, the preset rotational speed differential value ranges from 40rpm (revolutions per minute ) to 60rpm.
The specific value of the preset rotational speed difference is not limited, for example, 40rpm, 50rpm, 60rpm, etc.
It will be appreciated that after the number of injections within a single engine 20 operating cycle is reduced to 1, the number of injections within a single engine 20 operating cycle will not continue to be reduced, but will remain at 1.
In some embodiments, after reducing the number of injections within a single engine 20 operating cycle, the injection control method further includes:
determining that the average injection pulse width in the current sampling period is in a linear injection interval;
the number of injections in a single engine 20 operating cycle is adjusted to the desired number.
The average injection pulse width in the current sampling period is again in the linear injection interval, which indicates that the rotation speed jitter of the engine 20 is eliminated, and the number of injection times in the working cycle of the single engine 20 is controlled to the required number of times so as to improve the combustion efficiency of the engine 20.
For example, if the average injection pulse width is in the nonlinear injection interval, the number of injections in the single engine 20 duty cycle is reduced to 1, and it is determined that the average injection pulse width in the current sampling period is in the linear injection interval and the required number of injections is 3, the number of injections in the single engine 20 duty cycle is adjusted to 3.
The fuel injection control method in an embodiment of the invention specifically comprises the following steps:
s101: and acquiring the injection pulse width of each injection in the current sampling period.
S102: an average injection pulse width over the current sampling period is calculated.
S103: judging whether the average injection pulse width is in a nonlinear injection interval, if so, executing S104, and if not, executing S108;
s104: acquiring an average injection pulse width in a previous sampling period, judging whether the difference value between the average injection pulse width in the current sampling period and the average injection pulse width in the previous sampling period is larger than a first preset fluctuation duration, if so, executing S105, and if not, executing S108;
or, acquiring the injection interval between every two adjacent injection pulse widths in the current sampling period, calculating the average injection interval in the current sampling period, acquiring the average injection interval in the previous sampling period, determining whether the difference value between the average injection interval in the current sampling period and the average injection interval in the previous sampling period is greater than a second preset fluctuation duration, if so, executing S105, otherwise, executing S108.
S105: and acquiring the target rotating speed and the actual rotating speed of the current engine 20, judging whether the difference value between the target rotating speed and the actual rotating speed is larger than the preset rotating speed difference value, if yes, executing S106, and if not, executing S108.
S106: reducing the number of injections within a single engine 20 operating cycle;
s107: determining that the average injection pulse width in the current sampling period is in a linear injection interval;
s108: the number of injections in a single engine 20 operating cycle is adjusted to the desired number.
The embodiment of the present invention further provides a control device 10, referring to fig. 2, the control device 10 includes:
an acquiring unit 11, configured to acquire an injection pulse width of each injection in a current sampling period;
a calculation unit 12 for calculating an average injection pulse width in a current sampling period;
a determining unit 13 for determining that the average injection pulse width is in the nonlinear injection interval;
a control unit 14 for controlling the number of injections in a single engine 20 operating cycle.
The specific configuration of the control device 10 is not limited, and the control device 10 may be used as a part of the engine 20 to control the operation of the injector 22; the control device 10 may also control various parameters of the engine 20 including operation of the fuel injectors 22.
Exemplary, the present embodiment also provides a vehicle 30, referring to fig. 3, the vehicle 30 includes the engine 20 and the control device 10 of the foregoing embodiment.
The engine 20 comprises an oil sprayer 22 and an engine cylinder body 21, wherein a fuel oil channel is arranged in the oil sprayer 22, a combustion chamber is arranged in the engine cylinder body 21, and the fuel oil channel is selectively communicated with the combustion chamber; the control device 10 is electrically connected to the fuel injector 22. The oil injection timing of the oil injector 22 is adjusted through the control device 10, so that the shaking of the rotating speed of the engine 20 is restrained, the fuel economy is improved, the emission is reduced, and the user experience is improved.
The specific type of the control device 10 is not limited, and for example, an ECU (Electronic Control Unit, electronic controller unit) or the like.
The specific type of vehicle 30 is not limited and may be a pure fuel vehicle or a hybrid electric vehicle.
The embodiment of the invention also provides a memory, which comprises a stored program, wherein the equipment in which the memory is controlled to execute the fuel injection control method in any one of the previous embodiments when the program runs.
The specific type of Memory is not limited, and various media in which program codes can be stored, such as a mobile storage device, a Read Only Memory (ROM), a magnetic disk, or an optical disk, are examples.
The embodiment of the invention also provides a processor, which is used for running a program, wherein the fuel injection control method in any one of the previous embodiments is executed when the program runs.
In some embodiments, the vehicle includes the memory of the previous embodiments and the processor of the previous embodiments.
The various embodiments/implementations provided herein may be combined with one another without conflict.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (14)
1. An oil injection control method, characterized in that the oil injection control method comprises:
acquiring the injection pulse width of each injection in the current sampling period;
calculating the average injection pulse width in the current sampling period;
determining that the average injection pulse width is in a nonlinear injection interval;
the number of injections within a single engine operating cycle is reduced.
2. The fuel injection control method according to claim 1, wherein said determining that said average injection pulse width is in a non-linear injection interval comprises:
the average injection pulse width is determined to be less than 0.5ms.
3. The fuel injection control method according to claim 1, characterized in that after said determining that said average injection pulse width is in a nonlinear injection interval, said fuel injection control method further comprises:
and determining that the engine is subjected to rotational speed jitter.
4. The fuel injection control method according to claim 3, wherein said determining that said engine is subject to rotational speed jitter specifically comprises:
acquiring the average jet pulse width in the previous sampling period;
and determining that the difference value between the average injection pulse width in the current sampling period and the average injection pulse width in the previous sampling period is larger than a first preset fluctuation duration.
5. The fuel injection control method according to claim 4, wherein the value of the first preset fluctuation time period ranges from 0.05ms to 0.15ms.
6. The fuel injection control method according to claim 3, wherein said determining that said engine is subject to rotational speed jitter specifically comprises:
acquiring the injection interval between every two adjacent injection pulse widths in the current sampling period;
calculating the average injection interval in the current sampling period;
acquiring the average injection interval in the previous sampling period;
and determining that the difference value between the average injection interval in the current sampling period and the average injection interval in the previous sampling period is larger than a second preset fluctuation duration.
7. The fuel injection control method according to claim 6, characterized in that the value of the second preset fluctuation period ranges from 0.05ms to 0.15ms.
8. The fuel injection control method according to claim 4 or 6, characterized in that before said decreasing the number of fuel injections in a single engine operating cycle, the fuel injection control method further comprises:
acquiring a target rotating speed and an actual rotating speed of a current engine;
and determining that the difference between the target rotating speed and the actual rotating speed is larger than a preset rotating speed difference.
9. The fuel injection control method according to claim 8, wherein the preset rotational speed difference value ranges from 40rpm to 60rpm.
10. The fuel injection control method according to claim 1, characterized in that after said decreasing the number of fuel injections in a single engine operating cycle, the fuel injection control method further comprises:
determining that the average injection pulse width in the current sampling period is in a linear injection interval;
and adjusting the number of oil injection times in the working cycle of the single engine to the required number of times.
11. A control device, characterized in that the control device comprises:
the acquisition unit is used for acquiring the injection pulse width of each injection in the current sampling period;
a calculating unit, configured to calculate an average injection pulse width in the current sampling period;
a determining unit, configured to determine that the average injection pulse width is in a nonlinear injection interval;
and the control unit is used for controlling the oil injection times in the working cycle of the single engine.
12. A vehicle, characterized in that the vehicle comprises:
the engine comprises an oil sprayer and an engine cylinder body, wherein a fuel oil channel is arranged in the oil sprayer, a combustion chamber is arranged in the engine cylinder body, and the fuel oil channel is selectively communicated with the combustion chamber;
the control device of claim 11, wherein said control device is electrically connected to said fuel injector.
13. A memory, characterized in that the memory includes a stored program, wherein the device in which the memory is controlled to execute the fuel injection control method according to any one of the preceding claims 1 to 10 when the program runs.
14. A processor for running a program, wherein the program when run performs the fuel injection control method according to any one of the preceding claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310408775.1A CN116255267A (en) | 2023-04-12 | 2023-04-12 | Fuel injection control method, control device, vehicle, storage and processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310408775.1A CN116255267A (en) | 2023-04-12 | 2023-04-12 | Fuel injection control method, control device, vehicle, storage and processor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116255267A true CN116255267A (en) | 2023-06-13 |
Family
ID=86681015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310408775.1A Pending CN116255267A (en) | 2023-04-12 | 2023-04-12 | Fuel injection control method, control device, vehicle, storage and processor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116255267A (en) |
-
2023
- 2023-04-12 CN CN202310408775.1A patent/CN116255267A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1541842B1 (en) | Adaptive fuel injector trimming during a zero fuel condition | |
| US7881857B2 (en) | Method for operating an internal combustion engine | |
| EP0912824B1 (en) | A calibration method for a fuel injection system | |
| US8239116B2 (en) | Method and apparatus for generating injection signals for an injection system of an internal combustion engine | |
| EP1918556B1 (en) | Control system and method for an internal combustion engine | |
| EP0651150B1 (en) | Fuel injection apparatus for engine | |
| US20100147058A1 (en) | Fuel injector diagnostic system and method for direct injection engine | |
| EP1887205B1 (en) | Improvements relating to fuel injector control | |
| EP2039918A1 (en) | Fuel injection control apparatus for internal combustion engine | |
| US9404436B2 (en) | Method for operating an internal combustion engine using a corrected energizing time for fuel injections | |
| US8744728B2 (en) | Fuel sulfur content-based operation control of a diesel engine | |
| US20140100761A1 (en) | Method for operating a fuel injection system | |
| US10400685B2 (en) | Apparatus and method for correction of intake pulsation | |
| KR20140108650A (en) | Method and device for zero quantity calibration of a fuel injector valve | |
| US20060266336A1 (en) | Method and system for controlling fuel injection timing to maintain desired peak cylinder pressure for high altitude operation | |
| US20190003414A1 (en) | Injector delivery measurement with leakage correction | |
| KR101829491B1 (en) | Method for monitoring adaptation of an injection time of an injection valve of an internal combustion engine | |
| US20140338640A1 (en) | Method for learning a minimum actuation duration of fuel injectors of an internal combustion engine | |
| US9605611B2 (en) | Method for analyzing injector performance | |
| CN116255267A (en) | Fuel injection control method, control device, vehicle, storage and processor | |
| EP1813796A2 (en) | Controller and control method for an engine control unit | |
| CN109595088B (en) | Fuel injection system and method for vehicle propulsion system | |
| US7661408B2 (en) | Method for operating internal combustion engine | |
| US20150128688A1 (en) | Method for detecting a deviation of a compression pressure of one cylinder from that of another cylinder of an internal combustion engine | |
| US6742505B2 (en) | Internal combustion engine and method, computer program and control apparatus for operating the internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |