CN117418954A - Injection quantity control method, device, equipment and medium for fuel injector - Google Patents
Injection quantity control method, device, equipment and medium for fuel injector Download PDFInfo
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- CN117418954A CN117418954A CN202311506178.9A CN202311506178A CN117418954A CN 117418954 A CN117418954 A CN 117418954A CN 202311506178 A CN202311506178 A CN 202311506178A CN 117418954 A CN117418954 A CN 117418954A
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- 239000000446 fuel Substances 0.000 title claims abstract description 198
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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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Abstract
The embodiment of the invention discloses a method, a device, equipment and a medium for controlling the injection quantity of a fuel injector, wherein the method comprises the following steps: determining whether a target fuel injector needs to perform next-round injection pulse width adjustment, determining a first straight line under a preset injection pulse width and rail pressure difference coordinate system under the condition that the next-round injection pulse width adjustment is needed, determining a calculation relation of a target injection pulse width adjustment value in the next-round injection pulse width adjustment, determining the target injection pulse width adjustment value in the next-round injection pulse width adjustment according to the calculation relation, controlling fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference. According to the technical scheme provided by the embodiment of the invention, the difference of the injection quantity of each target fuel injector of the engine can be reduced, the control precision of the injection quantity of each target fuel injector is improved, and the engine always works in the optimal state.
Description
Technical Field
The embodiment of the invention relates to the technical field of engines, in particular to a method, a device, equipment and a medium for controlling the injection quantity of a fuel injector.
Background
For electronically controlled common rail engines, the accuracy and consistency of the injection quantity of each cylinder fuel injector is critical, and the economy, dynamics and emissions of the engine are all significantly affected. And how much of the injection amount of each cylinder fuel injector is essentially determined by the actual operating conditions of the engine. However, with the increase of the driving mileage and the working time of the engine, the aging conditions of abrasion, carbon deposition, cavitation and the like of the parts of each fuel injector are unavoidable, and the aging phenomena cause the injection quantity of the fuel injector to change, even cause the injection quantity characteristic curve of the fuel injector to deviate greatly.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a medium for controlling the injection quantity of fuel injectors, which can reduce the difference of the injection quantity of each target fuel injector of an engine, improve the control precision of the injection quantity of each target fuel injector and ensure that the engine always works in an optimal state.
In a first aspect, an embodiment of the present invention provides a method for controlling an injection amount of a fuel injector, including:
for a target fuel injector in an injection pulse width adjustment stage, acquiring a current actual rail pressure difference of the target fuel injector before and after fuel injection based on a current injection pulse width value, and determining whether the target fuel injector needs to perform next injection pulse width adjustment based on the current actual rail pressure difference;
Under the condition that the next-round injection pulse width adjustment is needed, determining a first straight line under a preset injection pulse width and rail pressure difference coordinate system according to the current actual rail pressure difference, the current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous-round injection pulse width adjustment;
determining a calculation relation of a target injection pulse width adjustment value in next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a numerical value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width;
and determining a target injection pulse width adjustment value in the next injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next injection pulse width adjustment is determined to be unnecessary.
In a second aspect, an embodiment of the present invention further provides an injection amount control device of a fuel injector, including:
the injection quantity adjustment determining module is used for acquiring a current actual rail pressure difference of the target fuel injector before and after fuel injection based on a current injection pulse width value aiming at the target fuel injector in an injection pulse width adjustment stage, and determining whether the target fuel injector needs to perform next injection pulse width adjustment based on the current actual rail pressure difference;
The first injection quantity adjustment analysis module is used for determining a first straight line under a coordinate system of a preset injection pulse width and a rail pressure difference according to the current actual rail pressure difference, the current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous injection pulse width adjustment under the condition that the next injection pulse width adjustment is required;
the second injection quantity adjustment analysis module is used for determining a calculation relation of a target injection pulse width adjustment value in the next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width;
and the target injection quantity adjustment determining module is used for determining a target injection pulse width adjustment value in the next-round injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next-round injection pulse width adjustment is determined to be unnecessary.
In a third aspect, an embodiment of the present invention further provides an electronic device, including:
One or more processors;
a storage means for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the injection amount control method of the fuel injector according to any embodiment of the present invention.
In a fourth aspect, an embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the injection amount control method of a fuel injector as provided by any embodiment of the present invention.
The embodiments of the above invention have the following advantages or benefits:
according to the embodiment of the invention, a target fuel injector in an injection pulse width adjustment stage is used for acquiring a current actual rail pressure difference before and after fuel injection of the target fuel injector based on a current injection pulse width value, and determining whether the target fuel injector needs to perform next injection pulse width adjustment based on the current actual rail pressure difference; under the condition that the next-round injection pulse width adjustment is needed, determining a first straight line under a preset injection pulse width and rail pressure difference coordinate system according to the current actual rail pressure difference, the current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous-round injection pulse width adjustment; determining a calculation relation of a target injection pulse width adjustment value in next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a numerical value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width; and determining a target injection pulse width adjustment value in the next injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next injection pulse width adjustment is determined to be unnecessary. According to the technical scheme provided by the embodiment of the invention, the difference of the injection quantity of each target fuel injector of the engine can be reduced, the control precision of the injection quantity of each target fuel injector is improved, and the engine always works in the optimal state.
Drawings
FIG. 1 is a flow chart of a method of controlling injection quantity of a fuel injector according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of rail pressure drop versus injected fuel quantity provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of an adjustment calculation principle according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method of controlling injection quantity of a fuel injector according to yet another embodiment of the present invention;
FIG. 5 is a schematic diagram of another adjustment calculation principle according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an injection amount control system of a fuel injector according to an embodiment of the present invention;
fig. 7 is a schematic view of a structure of an injection amount control device of a fuel injector according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a method for controlling an injection amount of a fuel injector according to an embodiment of the present invention, where the embodiment is applicable to a case of controlling an injection amount of a fuel injector. The method may be performed by an injection quantity control device of a fuel injector, which may be implemented in software and/or hardware, integrated in a computer device with application development functionality.
As shown in fig. 1, the injection amount control method of the fuel injector of the present embodiment includes the steps of:
s110, for the target fuel injector in the injection pulse width adjustment stage, acquiring the current actual rail pressure difference of the target fuel injector before and after fuel injection based on the current injection pulse width value, and determining whether the target fuel injector needs to perform the next injection pulse width adjustment based on the current actual rail pressure difference.
The target fuel injectors may be any one of the fuel injectors used in the electric control common rail engine, and the number of the fuel injectors in the electric control common rail engine may be 4 or 6, or may be other numbers, and the number of the fuel injectors is not limited in the embodiment of the present invention. All the fuel injectors share one fuel storage rail, wherein the pressure in the fuel storage rail is changed after any fuel injector injects fuel, the rail pressure difference, namely the rail pressure drop, is used for representing the pressure drop degree of the fuel storage rail caused by the fuel injector injecting fuel, so that the quantity of the fuel injected by the fuel injector can be represented, and the rail pressure drop caused by the fuel injector injecting fuel and the injected fuel quantity are in a linear relation under the same rail pressure before injection, as shown in fig. 2.
Further, the injection pulse width may be a pulse width for driving the fuel injector to inject, and the larger the value of the injection pulse width, the larger the resulting rail pressure difference, and correspondingly, the larger the injected fuel amount.
In the initial state, the injection pulse width of each target fuel injector is the same, but due to the tolerance between the respective fuel injector parts during the manufacturing process, the aging of the respective target fuel injector parts in the full life cycle, and the like, even when the respective fuel injectors are driven with the same injection pulse width under the same target rail pressure, the actual fuel injection amounts of the respective target fuel injectors are not the same, and the rail pressure differences in the fuel storage rails caused by the injection of the fuel by the respective target fuel injectors are also different, so it is necessary to adjust the injection pulse widths of the respective target fuel injectors so that the rail pressure differences thereof approach the same standard value, thereby reducing the variation in the injection amounts of the respective target fuel injectors of the engine.
In an alternative embodiment, because an error may exist in the current actual rail pressure difference obtained by single measurement, and accuracy of injection pulse width adjustment is affected, the method for calculating the average value may be a moving average method or a method for calculating an average value after removing a maximum value and a minimum value, and the method for calculating the average value may be selected according to actual needs.
The current injection pulse width value can be a preset initial injection pulse width value, or can be a pulse width value after at least one round of pulse width adjustment, or can be a pulse width value after at least one other round of pulse width adjustment, when the current pulse width value is a preset initial pulse width value or a pulse width value after the previous injection pulse width adjustment phase adjustment, the pulse width adjustment is judged to be the first round of adjustment of the current injection pulse width adjustment phase, and in one injection pulse width adjustment phase, when the current pulse width value is not the preset initial injection pulse width value nor the pulse width value after the previous injection pulse width adjustment phase adjustment, but the pulse width value after the at least one round of pulse width adjustment is judged to be the next round of adjustment on the basis of the previous round of adjustment.
And when the target fuel injector does not need to perform the next injection pulse width adjustment, the end of one injection pulse width adjustment stage is indicated, specifically, when the difference between the current rail pressure difference and the target rail pressure difference does not exceed a preset threshold value, the next injection pulse width adjustment is determined not to be performed, in an alternative embodiment, by determining the difference between the current actual rail pressure difference and the target rail pressure difference, and when the difference is greater than or equal to a preset difference upper limit threshold value, the next injection pulse width adjustment is determined to be performed.
Specifically, referring to fig. 3, fig. 3 is a schematic diagram of an adjustment calculation principle according to an embodiment of the present invention, when the current rail differential pressure is Δp 1 Time determination of ΔP 1 Differential pressure ΔP from target rail S If the difference value of the current rail pressure difference is larger than or equal to the preset difference upper limit threshold value, determining that the next injection pulse width adjustment is needed, wherein the current rail pressure difference after the next injection pulse width adjustment is delta P 2 Continuing to determine ΔP 2 And delta P S If still greater than or equal to the preset upper difference threshold, determining that the next injection pulse width adjustment is needed, if less than the preset upper difference threshold, determining that the next injection pulse width adjustment is not needed, wherein the difference between the current actual rail pressure difference and the target rail pressure difference in the multiple-wheel adjustment can be used (delta P S -ΔP n ) To represent.
The preset upper limit threshold of the difference is set according to actual needs, and the embodiment of the invention does not limit the upper limit threshold of the difference.
S120, under the condition that the next-round injection pulse width adjustment is needed, determining a first straight line under a preset injection pulse width and rail pressure difference coordinate system according to a current actual rail pressure difference, a current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous-round injection pulse width adjustment, wherein the previous actual rail pressure difference and the previous injection pulse width value refer to the current actual rail pressure difference and the current injection pulse width value of the front wheel, and the current actual rail pressure difference and the current injection pulse width value of the front wheel are determined to be started.
The condition that the next injection pulse width adjustment is required may be that the current actual rail pressure difference still deviates from the standard value by more than a preset threshold value after the front wheel adjustment, as shown in fig. 3, a rail pressure difference coordinate system is established, and the transverse axis x isThe driving pulse width L is the injection pulse width, the vertical axis y is the rail pressure drop delta P, taking the example that the current injection pulse width value is L after the adjustment of the front wheel by one round of adjustment, namely the adjustment of the second round 1 The current actual rail pressure difference is ΔP 1 Point B of the corresponding graph, the previous actual rail pressure difference is delta P 0 The previous injection pulse width value is L the same as the injection pulse width standard value S The straight line AB corresponding to the point a and where the point A, B is located is a first straight line, and the standard value y=Δp of the first straight line and the rail pressure difference S The abscissa L of the intersection point C' of (C) 2 I.e. the preset injection pulse width after the second round adjustment.
S130, determining a calculation relation of a target injection pulse width adjustment value in next injection pulse width adjustment according to a first straight line and a target rail pressure difference, wherein the target rail pressure difference is a value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width.
Specifically, the transverse straight line y=Δp corresponding to the straight line AB and the target rail differential pressure S Determining a target injection pulsewidth adjustment value Δl in a next round of injection pulsewidth adjustment 2 Is a calculated relation of (a).
The preset mapping relationship between the injection pulse width and the standard rail pressure difference is a standard curve in fig. 3, which represents a characteristic curve of the rail pressure difference of the unaged standard fuel injector changing along with the driving pulse width, the standard curve value is measured according to a bench test, each point on the curve represents the standard rail pressure difference corresponding to the unaged standard fuel injector under each injection pulse width, and the standard rail pressure difference can be recorded in a standard rail pressure difference mapping table.
By way of example, table 1 is a standard rail differential pressure map.
TABLE 1
The standard rail pressure difference mapping table is used for recording the values of standard rail pressure differences under different target rail pressures and different injection pulse widths.
The preset initial injection pulse width is an initial injection pulse width value which is uniformly set to enable all fuel injectors to reach the target injection quantity.
For example, table 2 is a preset initial injection pulse width map.
TABLE 2
The preset initial injection pulse width mapping table is used for recording preset initial pulse widths which are set by different target rail pressures to reach target injection quantity, and the corresponding preset initial injection pulse widths are found according to the target injection quantity and the target rail pressure in the setting stage before the start of injection.
Optionally, determining the calculation relation of the target injection pulse width adjustment value in the next injection pulse width adjustment according to the first straight line and the target rail pressure difference may include the following steps A1-A3:
and A1, determining an intersection point of a first straight line and a second straight line with a rail pressure difference value being a target rail pressure difference under a preset injection pulse width and rail pressure difference coordinate system.
As shown in fig. 3, i.e., straight lines AB and y=Δp S Is the intersection point C' of (C).
And A2, establishing a similar triangle geometric relationship containing a line segment corresponding to the target injection pulse width adjustment value according to the position relationship between the first coordinate point corresponding to the current actual rail pressure difference and the current injection pulse width value, and the second coordinate point corresponding to the previous actual rail pressure difference and the previous injection pulse width value and the intersection point.
Specifically, the first coordinate point corresponding to the current actual rail pressure difference and the current injection pulse width value is point B, the second coordinate point corresponding to the previous actual rail pressure difference and the previous injection pulse width value is point a, the intersection point is point C', and the straight line y=Δp corresponding to the ordinate of point a 0 Straight line x=l corresponding to the abscissa of point B 1 Intersecting point M (L) 1 ，ΔP 0 )，A、BThe three points M form a right triangle ABM, and the straight line y=delta P 0 From straight line x=l 2 Intersecting point N (L) 2 ，ΔP 0 ) The three points A, C ', N form a right triangle AC' N, and the line segment corresponding to the target injection pulse width adjustment value is delta L 2 The corresponding line segment is a line segment MN.
And A3, determining a calculation relation of the target injection pulse width adjustment value based on the similar triangle geometric relation.
The right triangle ABM is similar to the right triangle ABN, and the target injection pulse width adjustment value delta L is determined 2 The calculated relation of (2) is:
(ΔL 2 +ΔL 1 )/ΔL 1 ＝(ΔP S -ΔP 0 )/(ΔP 1 -ΔP 0 ) Simplifying and obtaining:
ΔL 2 ＝(ΔP S -ΔP 0 )/(ΔP 1 -ΔP 0 )×ΔL 1 -ΔL 1 ，
the second wheel adjusted preset injection pulse width L 2 Can be expressed as:
L 2 ＝L 1 +ΔL 2 ＝(ΔP S -ΔP 0 )/(ΔP 1 -ΔP 0 )×ΔL 1 +L S 。
and S140, determining a target injection pulse width adjustment value in the next-round injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next-round injection pulse width adjustment is determined to be unnecessary.
Specifically, the target injection pulse width adjustment value DeltaL 2 With the current injection pulse width value L 1 The sum of the preset injection pulse width L after the adjustment of the 2 nd round 2 Fuel injection quantity control is performed by presetting an injection pulse width, and a new actual rail pressure difference is measured to be delta P 2 Corresponds to the coordinates (L 2 ，ΔP 2 ) Point (1) is point C, ΔP 2 Ratio DeltaP 1 More approximate to delta P S According to DeltaP 2 And delta P S Is to determine if a third round of adjustment is required, if soAnd repeating the steps S110 to S130, and ending the adjustment if not needed.
Alternatively, when there is a previous injection pulse width adjustment before the current actual rail pressure difference, the next round of target injection pulse width adjustment value may be calculated by the following formula:
ΔL n ＝(ΔP s -ΔP n-1 )/(ΔP n-1 -ΔP n-2 )*ΔL n-1 (when n is not less than 2)
Wherein DeltaL n Indicating the target injection pulse width adjustment value for the nth round adjustment determination.
The preset injection pulse width determined after several rounds of adjustment is taken as an abscissa, and the point of taking the rail pressure difference actually measured by the injection of the fuel injector driven by the preset injection pulse width as an ordinate, namely, the point of A, B, C in fig. 3 is connected, so that a characteristic curve of the rail pressure difference of the target fuel injector, namely, an aging curve in fig. 3, which changes along with the driving pulse width can be obtained.
According to the technical scheme, the target fuel injector in the injection pulse width adjustment stage is used for acquiring the current actual rail pressure difference before and after fuel injection based on the current injection pulse width value, and determining whether the target fuel injector needs to perform next injection pulse width adjustment or not based on the current actual rail pressure difference; under the condition that the next-round injection pulse width adjustment is needed, determining a first straight line under a preset injection pulse width and rail pressure difference coordinate system according to the current actual rail pressure difference, the current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous-round injection pulse width adjustment; determining a calculation relation of a target injection pulse width adjustment value in next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a numerical value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width; and determining a target injection pulse width adjustment value in the next injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next injection pulse width adjustment is determined to be unnecessary. According to the technical scheme provided by the embodiment of the invention, the difference of the injection quantity of each target fuel injector of the engine can be reduced, the control precision of the injection quantity of each target fuel injector is improved, and the engine always works in the optimal state.
Example two
Fig. 4 is a flowchart of a method for controlling an injection amount of a fuel injector according to an embodiment of the present invention, where the method for controlling an injection amount of a fuel injector according to the present invention is the same as that of the fuel injector according to the above embodiment, and further describes a process of controlling an injection amount of a fuel injector. The method may be performed by an injection quantity control device of a fuel injector, which may be implemented in software and/or hardware, integrated in a computer device with application development functionality.
As shown in fig. 4, the injection amount control method of the fuel injector of the present embodiment includes the steps of:
s210, determining the running condition of the engine where the target fuel injector is located, determining whether to enter an injection pulse width adjustment stage according to the running condition, and entering the injection pulse width adjustment stage if the running condition meets the requirement that the engine is in a stable working condition.
Specifically, the operating conditions of the engine may include: the rotational speed fluctuation amount is smaller than a rotational speed fluctuation amount threshold value; the fluctuation amount of the target oil amount is smaller than a fluctuation amount threshold of the target oil amount; the fluctuation amount of the target rail pressure is smaller than a fluctuation amount threshold value of the target rail pressure; the fluctuation amount of the accelerator is smaller than the threshold value of the fluctuation amount of the accelerator, and of course, the fluctuation amount of the accelerator can be other conditions capable of ensuring that the engine is in a stable working condition, and the embodiment is not limited to the above.
The rotational speed fluctuation amount threshold, the fluctuation amount threshold of the target oil mass, the fluctuation amount threshold of the target rail pressure and the accelerator fluctuation amount threshold can be adjusted according to actual needs, and the embodiment of the invention is not limited to the above. When one condition or a combination of several conditions can be met, the engine is determined to be under a stable working condition, the injection pulse width adjustment stage can be started, and if the current rail pressure difference is determined to be smaller than the preset difference upper limit threshold value, the injection pulse width adjustment stage is determined to be started.
Optionally, if at least one condition is not satisfied in the injection pulse width adjustment stage, ending the injection pulse width adjustment, storing the last preset injection pulse width value determined in the adjustment, and when it is judged that the injection pulse width adjustment stage can be entered again, obtaining a new injection pulse width adjustment stage, and taking the last preset injection pulse width value in the previous adjustment as the current injection pulse width of the first adjustment stage.
S220, for the target fuel injector entering the injection pulse width adjustment stage, when the previous injection pulse width adjustment does not exist before the current actual rail pressure difference, determining the corresponding reference injection pulse width of the current actual rail pressure difference in the preset mapping relation.
Specifically, referring to FIG. 3, the current actual rail pressure differential, ΔP 0 The corresponding reference injection pulse width of the current actual rail pressure difference in the preset mapping relation is y=deltap 0 Ordinate L of intersection point X with standard curve X 。
S230, taking the difference value between the reference injection pulse width and the preset initial injection pulse width as a target injection pulse width adjustment value for the next injection pulse width adjustment.
Specifically, the injection pulse width L will be referenced X And preset initial injection pulse width L S The difference is made to obtain a first round target injection pulse width adjustment value delta L 1 ＝L S -L X Will DeltaL 1 With the current injection pulse width L 0 Adding to obtain a preset injection pulse width L 1 ＝ΔL 1 +L 0 Since FIG. 3 is at L for both target fuel injectors 0 ＝L S Adjustment is made with injection driven, so only L is marked in fig. 3 S I.e. the target fuel injector injection in the next round will be at the preset injection pulse width L 1 ＝ΔL 1 +L S The lower spray is driven.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating another adjustment calculation principle, and the current injection pulse width L in fig. 5 0 Is not equal to L S The current injection pulse width L in FIG. 5 0 Not necessarily equal to L S For example, L in FIG. 5 0 ＞L S But the calculation method and L 0 ＝L S When the same is made, by the current actual rail pressure difference, namely delta P 0 The corresponding reference injection pulse width of the current actual rail pressure difference in the preset mapping relation is y=deltap 0 Ordinate L of intersection point X with standard curve X Will refer to the injection pulse width L X And preset initial injection pulse width L S Taking the difference to obtain the target injection pulse width adjustment value delta L of the next injection pulse width adjustment of the first injection 1 ＝L S -L X The target fuel injector injection in the next round will be at the preset injection pulse width L 1 ＝ΔL 1 +L 0 The lower spray is driven.
S240, for the target fuel injector in the injection pulse width adjustment stage, acquiring the current actual rail pressure difference of the target fuel injector before and after fuel injection based on the current injection pulse width value, and determining whether the target fuel injector needs to perform the next injection pulse width adjustment based on the current actual rail pressure difference.
Specifically, after one round of adjustment, the target fuel injector is obtained based on the current injection pulse width value L 1 Current actual rail pressure difference Δp before and after fuel injection 1 According to DeltaP 1 It is determined whether the target fuel injector requires a second-round injection pulse width adjustment.
The new actual rail pressure difference and the corresponding multiple target injection pulse width adjustment values are obtained in the multi-wheel adjustment, so that the data can be recorded in the table after being processed, the processing modes corresponding to different actual rail pressure differences can be conveniently and quickly queried based on the data in the table, and in an alternative implementation mode, when the fact that the next-wheel injection pulse width adjustment is not needed is determined, the target injection pulse width total adjustment value mapping table is updated based on the new actual rail pressure difference.
Specifically, a target injection pulse width adjustment value map is updated based on a target injection pulse width adjustment value determined by last-round injection pulse width adjustment, wherein the target injection pulse width adjustment value map is a difference value between a preset injection pulse width and a preset initial injection pulse width, and the target injection pulse width adjustment value map is used for recording a target rail pressure, and a corresponding relation between the preset initial injection pulse width and the target injection pulse width adjustment value.
Determining a preset injection pulse width L by a final target injection pulse width adjustment value determined by the last round of injection pulse width adjustment of the target fuel injector in the current adjustment n The target injection pulse width total adjustment value (L n -L S ) The target injection pulse width total adjustment value mapping table stored in each target fuel injector is used for adjusting the final preset injection pulse width L after the current adjustment when the target fuel injector is injected after the current adjustment n To drive the target fuel injector.
Table 3 is an example map of target injection pulse width total adjustment values.
TABLE 3 Table 3
It can be seen from table 1 that the target fuel injector requires a total target injection pulsewidth adjustment of 80.4 when the target rail pressure is 600 and the preset initial injection pulsewidth is 1000, and the preset injection pulsewidth is 1080.4.
Fig. 6 is a schematic diagram of an injection quantity control system of a fuel injector according to an embodiment of the present invention, and as shown in fig. 6, the system includes a fuel supply pump 601, a fuel storage rail 602, a plurality of target fuel injectors 603, a pressure sensor 604, and a controller 605.
The fuel supply pump 601 supplies fuel to the fuel storage rail 602 for pressure accumulation, and injects the fuel from the fuel injector 603 into a cylinder of the engine for combustion work, under the control of the controller 605. The controller 605 collects pressure information in the fuel storage rail 602 through the pressure sensor 604, and calculates a rail pressure drop, that is, a rail pressure difference, generated when the current fuel injector 603 injects fuel.
Firstly, according to the target oil quantity, namely the target injection quantity and the target rail pressure, a standard pulse width mapping table, namely a preset initial injection pulse width mapping table, is queried to obtain a standard pulse width, namely a preset initial injection pulse width, wherein the standard pulse width mapping table of each target fuel injector is the same, and different standard pulse widths exist under different working conditions.
And then, according to the preset initial injection pulse width and the target rail pressure, inquiring a correction pulse width mapping table of each target fuel injector to obtain the correction pulse width of each target fuel injector. It should be noted that each target fuel injector has a different correction pulse width map and correction pulse width.
In the correction pulse width self-learning module, the correction pulse width self-learning process is performed on each target fuel injector, that is, the description of S110 to S140 in this embodiment, the obtained correction pulse width, that is, the target injection pulse width total adjustment value is stored in the correction pulse width map corresponding to each target fuel injector, that is, the target injection pulse width total adjustment value map.
Finally, the total pulse width of each target fuel injector, i.e., the preset injection pulse width, is equal to the sum of the standard pulse width plus the corrected pulse width of each target fuel injector. Finally, the target fuel injectors are driven and controlled by the total pulse width of the target fuel injectors.
S250, under the condition that the next-round injection pulse width adjustment is needed, determining a first straight line under a coordinate system of a preset injection pulse width and a rail pressure difference according to the current actual rail pressure difference, the current injection pulse width value and the previous actual rail pressure difference and the previous injection pulse width value corresponding to the previous-round injection pulse width adjustment.
And S260, determining a calculation relation of a target injection pulse width adjustment value in next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a value determined in a preset mapping relation between the injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width.
S270, determining a target injection pulse width adjustment value in the next injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to obtain a new actual rail pressure difference, repeating the steps according to the new actual rail pressure difference until the next injection pulse width adjustment is determined to be unnecessary, and ending the current injection pulse width adjustment.
Specifically, the steps of S240-S260 are repeated based on the new actual rail pressure differential until it is determined that the next pulse width adjustment is no longer necessary.
According to the technical scheme, the running condition of the engine where the target fuel injector is located is determined; determining whether to enter the injection pulse width adjustment stage according to the running condition, and determining a reference injection pulse width corresponding to the current actual rail pressure difference in the preset mapping relation; and taking the difference value between the reference injection pulse width and the preset initial injection pulse width as a target injection pulse width adjustment value for the next injection pulse width adjustment. According to the technical scheme provided by the embodiment of the invention, the difference of the injection quantity of each target fuel injector of the engine can be reduced, the control precision of the injection quantity of each target fuel injector is improved, and the engine always works in the optimal state.
Example III
Fig. 7 is a schematic structural diagram of an injection quantity control device of a fuel injector according to an embodiment of the present invention, where the embodiment is applicable to a situation of injection quantity control of a fuel injector, and the device may be implemented by software and/or hardware and integrated into a computer terminal device with an application development function.
As shown in fig. 7, the injection amount control device of the fuel injector includes: the injection amount adjustment determination module 310, the first injection amount adjustment analysis module 320, the second injection amount adjustment analysis module 330, and the target injection amount adjustment determination module 340.
The injection quantity adjustment determining module 310 is configured to obtain, for a target fuel injector in an injection pulse width adjustment stage, a current actual rail pressure difference of the target fuel injector before and after fuel injection based on a current injection pulse width value, and determine whether the target fuel injector needs to perform a next injection pulse width adjustment based on the current actual rail pressure difference.
The first injection quantity adjustment analysis module 320 is configured to determine, when a next-round injection pulse width adjustment is required, a first straight line under a coordinate system of a preset injection pulse width and a rail pressure difference according to the current actual rail pressure difference, the current injection pulse width value, and a previous actual rail pressure difference and a previous injection pulse width value corresponding to a previous-round injection pulse width adjustment.
A second injection quantity adjustment analysis module 330, configured to determine a calculation relation of a target injection pulse width adjustment value in a next injection pulse width adjustment according to the first line and a target rail pressure difference, where the target rail pressure difference is a value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width;
the target injection quantity adjustment determining module 340 is configured to determine a target injection pulse width adjustment value in the next injection pulse width adjustment according to the calculation relation, perform fuel injection quantity control based on the target injection pulse width adjustment value to obtain a new actual rail pressure difference, and repeat the above steps according to the new actual rail pressure difference until it is determined that the next injection pulse width adjustment is no longer required.
According to the technical scheme, the target fuel injector in the injection pulse width adjustment stage is used for acquiring the current actual rail pressure difference before and after fuel injection based on the current injection pulse width value, and determining whether the target fuel injector needs to perform next injection pulse width adjustment or not based on the current actual rail pressure difference; under the condition that the next-round injection pulse width adjustment is needed, determining a first straight line under a preset injection pulse width and rail pressure difference coordinate system according to the current actual rail pressure difference, the current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous-round injection pulse width adjustment; determining a calculation relation of a target injection pulse width adjustment value in next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a numerical value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width; and determining a target injection pulse width adjustment value in the next injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next injection pulse width adjustment is determined to be unnecessary. According to the technical scheme provided by the embodiment of the invention, the difference of the injection quantity of each target fuel injector of the engine can be reduced, the control precision of the injection quantity of each target fuel injector is improved, and the engine always works in the optimal state.
In an alternative embodiment, the second injection quantity adjustment analysis module 330 is specifically configured to:
determining an intersection point of the first straight line and a second straight line with a rail pressure difference value being a target rail pressure difference under the preset injection pulse width and rail pressure difference coordinate system;
establishing a similar triangle geometric relationship containing a line segment corresponding to the target injection pulse width adjustment value according to the position relationship between the current actual rail pressure difference and the first coordinate point corresponding to the current injection pulse width value, the previous actual rail pressure difference and the second coordinate point corresponding to the previous injection pulse width value and the intersection point;
and determining a calculation relation of the target injection pulse width adjustment value based on the similar triangle geometric relation.
In an alternative embodiment, the injection quantity control device of the fuel injector further comprises a third injection quantity adjustment analysis module for, when the previous injection pulse width adjustment is not present before the current actual rail pressure difference:
determining a corresponding reference injection pulse width of the current actual rail pressure difference in the preset mapping relation;
and taking the difference value between the reference injection pulse width and the preset initial injection pulse width as a target injection pulse width adjustment value for the next injection pulse width adjustment.
In an alternative embodiment, the injection amount adjustment determination module 310 may be further configured to:
acquiring a plurality of corresponding actual rail pressure differences after the target fuel injector performs fuel injection for a plurality of times based on the current injection pulse width value;
and taking the average value of the actual rail pressure differences as the current actual rail pressure difference.
In an alternative embodiment, the injection amount adjustment determination module 310 may be further configured to:
determining a difference between the current actual rail differential pressure and a target rail differential pressure;
and when the difference is greater than or equal to a preset difference upper limit threshold, determining that the next injection pulse width adjustment is needed.
In an alternative embodiment, the injection quantity control device of the fuel injector further includes an engine operating condition analysis module for:
determining an operating condition of an engine in which the target fuel injector is located;
and determining whether to enter the injection pulse width adjustment stage according to the operation condition.
In an alternative embodiment, the injection quantity control device of the fuel injector further includes a target injection pulse width total adjustment value map confirming module for:
and updating a target injection pulse width total adjustment value mapping table based on the new actual rail pressure difference.
The injection quantity control device of the fuel injector provided by the embodiment of the invention can execute the injection quantity control method of the fuel injector provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 8 is a block diagram of an electronic device for implementing a method of controlling an injection amount of a fuel injector according to an embodiment of the present application, and the electronic device shown in fig. 8 is merely an example, and should not impose any limitation on the function and application range of the embodiment of the present application. The electronic device may typically be a smart phone, a tablet computer, a notebook computer, a vehicle-mounted terminal, a wearable device, etc.
As shown in fig. 8, the electronic device 400 is embodied in the form of a general purpose computing device. The components of electronic device 400 may include, but are not limited to: one or more processors or processing units 401, a system memory 402, a bus 403 that connects the various system components (including the system memory 402 and the processing units 401).
Bus 403 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include Industry Standard Architecture (ISA) bus, micro channel architecture (MAC) bus, enhanced ISA bus, video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
Electronic device 400 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by electronic device 400 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 402 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 404 and/or cache memory 405. Electronic device 400 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 406 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 8, commonly referred to as a "hard drive"). Although not shown in fig. 8, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In such cases, each drive may be coupled to bus 403 through one or more data medium interfaces. Memory 402 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of embodiments of the invention.
A program/utility 408 having a set (at least one) of program modules 407 may be stored in, for example, memory 402, such program modules 407 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 407 generally perform the functions and/or methods of the described embodiments of the invention.
The electronic device 400 may also communicate with one or more external devices 409 (e.g., keyboard, pointing device, display 410, etc.), with one or more devices that enable a user to interact with the electronic device 400, and/or with any device (e.g., network card, modem, etc.) that enables the electronic device 400 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 411. Also, electronic device 400 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 412. As shown in fig. 8, the network adapter 412 communicates with other modules of the electronic device 400 over the bus 403. It should be appreciated that although not shown in fig. 8, other hardware and/or software modules may be used in connection with electronic device 400, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processing unit 401 executes various functional applications and data processing by running a program stored in the system memory 402, for example, implements a fuel injector injection amount control method provided by an embodiment of the present invention, including:
for a target fuel injector in an injection pulse width adjustment stage, acquiring a current actual rail pressure difference of the target fuel injector before and after fuel injection based on a current injection pulse width value, and determining whether the target fuel injector needs to perform next injection pulse width adjustment based on the current actual rail pressure difference;
under the condition that the next-round injection pulse width adjustment is needed, determining a first straight line under a preset injection pulse width and rail pressure difference coordinate system according to the current actual rail pressure difference, the current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous-round injection pulse width adjustment;
determining a calculation relation of a target injection pulse width adjustment value in next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a numerical value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width;
And determining a target injection pulse width adjustment value in the next injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next injection pulse width adjustment is determined to be unnecessary.
Example five
A fifth embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method for controlling an injection amount of a fuel injector as provided by the embodiment of the present invention, including:
for a target fuel injector in an injection pulse width adjustment stage, acquiring a current actual rail pressure difference of the target fuel injector before and after fuel injection based on a current injection pulse width value, and determining whether the target fuel injector needs to perform next injection pulse width adjustment based on the current actual rail pressure difference;
under the condition that the next-round injection pulse width adjustment is needed, determining a first straight line under a preset injection pulse width and rail pressure difference coordinate system according to the current actual rail pressure difference, the current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous-round injection pulse width adjustment;
Determining a calculation relation of a target injection pulse width adjustment value in next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a numerical value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width;
and determining a target injection pulse width adjustment value in the next injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next injection pulse width adjustment is determined to be unnecessary.
The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having 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 portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A method of controlling an injection amount of a fuel injector, comprising:
for a target fuel injector in an injection pulse width adjustment stage, acquiring a current actual rail pressure difference of the target fuel injector before and after fuel injection based on a current injection pulse width value, and determining whether the target fuel injector needs to perform next injection pulse width adjustment based on the current actual rail pressure difference;
under the condition that the next-round injection pulse width adjustment is needed, determining a first straight line under a preset injection pulse width and rail pressure difference coordinate system according to the current actual rail pressure difference, the current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous-round injection pulse width adjustment;
Determining a calculation relation of a target injection pulse width adjustment value in next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a numerical value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width;
and determining a target injection pulse width adjustment value in the next injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next injection pulse width adjustment is determined to be unnecessary.
2. The method of claim 1, wherein determining a calculated relationship for a target injection pulsewidth adjustment value in a next round of injection pulsewidth adjustment based on the first line and target rail pressure differential, comprises:
determining an intersection point of the first straight line and a second straight line with a rail pressure difference value being a target rail pressure difference under the preset injection pulse width and rail pressure difference coordinate system;
establishing a similar triangle geometric relationship containing a line segment corresponding to the target injection pulse width adjustment value according to the position relationship between the current actual rail pressure difference and the first coordinate point corresponding to the current injection pulse width value, the previous actual rail pressure difference and the second coordinate point corresponding to the previous injection pulse width value and the intersection point;
And determining a calculation relation of the target injection pulse width adjustment value based on the similar triangle geometric relation.
3. The method of claim 1, wherein determining a target injection pulsewidth adjustment value in a next round of injection pulsewidth adjustment when the previous round of injection pulsewidth adjustment is not present prior to the current actual rail pressure differential, comprises:
determining a corresponding reference injection pulse width of the current actual rail pressure difference in the preset mapping relation;
and taking the difference value between the reference injection pulse width and the preset initial injection pulse width as a target injection pulse width adjustment value for the next injection pulse width adjustment.
4. A method according to any one of claims 1-3, wherein obtaining a current actual rail pressure differential of the target fuel injector before and after fuel injection based on a current injection pulsewidth value comprises:
acquiring a plurality of corresponding actual rail pressure differences after the target fuel injector performs fuel injection for a plurality of times based on the current injection pulse width value;
and taking the average value of the actual rail pressure differences as the current actual rail pressure difference.
5. A method according to any of claims 1-3, wherein determining whether the target fuel injector requires a next round of injection pulse width adjustment based on the current actual rail pressure differential comprises:
Determining a difference between the current actual rail differential pressure and a target rail differential pressure;
and when the difference is greater than or equal to a preset difference upper limit threshold, determining that the next injection pulse width adjustment is needed.
6. A method according to any one of claims 1-3, characterized in that before entering the injection pulse width modulation phase, the method further comprises:
determining an operating condition of an engine in which the target fuel injector is located;
and determining whether to enter the injection pulse width adjustment stage according to the operation condition.
7. A method according to any one of claims 1-3, wherein upon determining that a next round of injection pulse width adjustment is no longer required, the method further comprises:
and updating a target injection pulse width total adjustment value mapping table based on the new actual rail pressure difference.
8. An injection amount control device of a fuel injector, characterized by comprising:
the injection quantity adjustment determining module is used for acquiring a current actual rail pressure difference of the target fuel injector before and after fuel injection based on a current injection pulse width value aiming at the target fuel injector in an injection pulse width adjustment stage, and determining whether the target fuel injector needs to perform next injection pulse width adjustment based on the current actual rail pressure difference;
The first injection quantity adjustment analysis module is used for determining a first straight line under a coordinate system of a preset injection pulse width and a rail pressure difference according to the current actual rail pressure difference, the current injection pulse width value and a previous actual rail pressure difference and a previous injection pulse width value corresponding to the previous injection pulse width adjustment under the condition that the next injection pulse width adjustment is required;
the second injection quantity adjustment analysis module is used for determining a calculation relation of a target injection pulse width adjustment value in the next injection pulse width adjustment according to the first straight line and a target rail pressure difference, wherein the target rail pressure difference is a value determined in a preset mapping relation between an injection pulse width and a standard rail pressure difference based on a preset initial injection pulse width;
and the target injection quantity adjustment determining module is used for determining a target injection pulse width adjustment value in the next-round injection pulse width adjustment according to the calculation relation, controlling the fuel injection quantity based on the target injection pulse width adjustment value to acquire a new actual rail pressure difference, and repeating the steps according to the new actual rail pressure difference until the next-round injection pulse width adjustment is determined to be unnecessary.
9. An electronic device, the electronic device comprising:
One or more processors;
a storage means for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the injection amount control method of the fuel injector of any one of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the injection amount control method of a fuel injector as claimed in any one of claims 1 to 7.
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| CN202311506178.9A CN117418954A (en) | 2023-11-13 | 2023-11-13 | Injection quantity control method, device, equipment and medium for fuel injector |
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| CN202311506178.9A CN117418954A (en) | 2023-11-13 | 2023-11-13 | Injection quantity control method, device, equipment and medium for fuel injector |
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