CN106150737A - A kind of multi-injection oil mass compensation method and device - Google Patents
A kind of multi-injection oil mass compensation method and device Download PDFInfo
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- CN106150737A CN106150737A CN201510206576.8A CN201510206576A CN106150737A CN 106150737 A CN106150737 A CN 106150737A CN 201510206576 A CN201510206576 A CN 201510206576A CN 106150737 A CN106150737 A CN 106150737A
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Abstract
The invention provides a kind of multi-injection oil mass compensation method and device, engine can be solved when being operated in repeatedly under the injection mode that (more than twice) sprays, the problem that the oil mass using existing oil mass oscillation compensation model compensation to be caused differs greatly, the oil mass of injection every time in engine operational cycle can be accurately compensated for, so that actual ejection oil mass is close to the given desired value of ECU, thus ensure the emission performance of stability that engine torque exports and engine.Described method comprises determining that the first correction oil mass and the i+1 time of the i-th+2 times injections are sprayed the second correction oil mass to described the i-th+2 times injections by i & lt injection, wherein, i takes all integers between 1 to N-2, and N is the injecting times of the interior fuel injector of engine one action circulation；According to described first correction oil mass and described second correction oil mass, the target oil mass of described the i-th+2 times injections is compensated.The present invention is applicable to technical field of engine control.
Description
Technical field
The present invention relates to technical field of engine control, particularly to a kind of multi-injection oil mass compensation method and
Device.
Background technology
Currently, close to reduce the particle (Particulate Matter, PM) of engine emission and nitrogen oxidation
Thing (NOx), introduce the injection mode of multi-injection, i.e. will spray in the one action of engine circulates
The fuel oil of combustion chamber, is divided into twice or multi-injection from once injection.
In order to ensure the requirement of dynamic property, economy and the low emission of engine, need to accurately control each time
Fuel oil straying quatity.But, before execution during secondary injection, the oil-out in fuel injector control chamber can be opened,
When terminating previous injection, the oil-out in fuel injector control chamber can be closed rapidly again, is so connecting oil rail and spray
Pressure wave can be produced so that rear injection in pressure duct in the high-pressure oil pipe of oil device and oil injector body
The oil mass of fuel oil deviates the given desired value of electronic control unit (Electronic Control Unit, ECU).
Therefore, it is necessary to the oil mass of rear injection is compensated, so that the oil mass of rear injection is close to desired value.Existing
The adjacent data sprayed twice before and after having technical basis, are associated point on the principal element affecting oil mass fluctuation
Analysis, setting up oil mass oscillation compensation model, and then compensates according to oil mass volatility model.For twice with
On multi-injection, if only consider adjacent twice injection between oil mass influence of fluctuations, on the one hand, adjacent two
Oil mass fluctuation between secondary injection may not have clear and definite regularity；On the other hand, the injection twice being separated by it
Between also can influence each other.Therefore, according to existing oil mass oscillation compensation model, the oil mass that rear time is sprayed is carried out
Compensate, differing greatly between actual ejection oil mass and target oil mass can be made.
Content of the invention
In view of this, it is contemplated that propose a kind of multi-injection oil mass compensation method, at least to solve to start
When machine is operated in repeatedly under the injection mode that (more than twice) sprays, use existing oil mass oscillation compensation mould
Type compensates the problem that caused oil mass differs greatly, can be to the injection oil every time in engine operational cycle
Amount accurately compensates for, so that the desired value that actual ejection oil mass gives close to ECU, thus ensure to start
The stability of machine moment of torsion output and the emission performance of engine.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of multi-injection oil mass compensation method, comprising:
Determine i & lt injection to the first correction oil mass of the i-th+2 times injections and i+1 time injection to described the
Second correction oil mass of i+2 injection, wherein, i takes all integers between 1 to N-2, and N is engine
The injecting times of fuel injector in one action circulation；
According to described first correction oil mass and described second correction oil mass, the target to described the i-th+2 times injections
Oil mass compensates.
Further, the first correction oil mass to the i-th+2 times injections and i+1 are sprayed in described determination i & lt
Before secondary injection is to the second correction oil mass of described the i-th+2 times injections, also include:
Determine the second hydraulic pressure of the first hydraulic delay time, the described i+1 time injection that described i & lt sprays
Time delay, and,
Temperature value before passing through fuel filter according to engine water temperature and fuel oil, determines that oil temperature affects coefficient,
Described oil temperature affects coefficient and represents the influence degree to fuel density and fuel pressure for the fuel oil temperature；
Described determination i & lt injection to the first correction oil mass of the i-th+2 times injections and i+1 time injection to described
Second correction oil mass of the i-th+2 times injections, comprising:
According to described first hydraulic delay time, described oil temperature affect coefficient, the first of the injection of described i & lt
Target oil mass, the injection of described i & lt and the very first time interval of described i+1 time injection, determine described i-th
The first benchmark correction oil mass to described the i-th+2 times injections for the secondary injection；And, prolong according to described second hydraulic pressure
Slow time, described oil temperature affect coefficient, the second target oil mass of described i+1 time injection, described i+1
Second time interval of secondary injection and described the i-th+2 times injections, determines described i+1 time injection to described the
Second benchmark correction oil mass of i+2 injection；
According to described first object oil mass, determining the first correction factor, described first correction factor represents described
The oil mass of i & lt injection affects coefficient to described the i-th+2 times injections；And, according to described the i-th+2 times sprays
The common rail pressure of the 3rd target oil mass penetrated, described i+1 time injection, determines the second correction factor, described
Second correction factor represent described 3rd target oil mass on described the i-th+2 times injection affect coefficient；
Described first benchmark correction oil mass is multiplied with described first correction factor, it is thus achieved that described first revises oil
Amount；And, described second benchmark correction oil mass is multiplied with described second correction factor, it is thus achieved that described second
Revise oil mass.
Further, the first hydraulic delay time, the described i+1 of the injection of described determination described i & lt are secondary
The second hydraulic delay time of injection, comprising:
Receive control instruction, and determine described first object oil mass, described second mesh according to described control instruction
Mark oil mass, wherein, comprises described first object oil mass, described second target oil mass in described control instruction；
Obtain the common rail pressure of described i & lt injection, and spray according to described first object oil mass, described i & lt
The common rail pressure penetrated and the fisrt feature prestoring map Map table, determine the described first hydraulic delay time,
Wherein, described fisrt feature Map table includes the corresponding relation of oil mass, common rail pressure and hydraulic delay time；
Obtain the common rail pressure of described i+1 time injection, and according to described second target oil mass, described i+1
The common rail pressure of secondary injection and described fisrt feature Map table, determine the described second hydraulic delay time.
Further, described according to described first hydraulic delay time, described oil temperature affect coefficient, described
The very first time interval that the first object oil mass of i injection, the injection of described i & lt are sprayed with described i+1 time,
Determine the first benchmark correction oil mass to described the i-th+2 times injections for the described i & lt injection, comprising:
Described first hydraulic delay time, the described very first time are spaced and are added, it is thus achieved that the first influence time,
Described first influence time represents that the injection of described i & lt sprays, to described the i-th+2 times, the duration impacting；
Described oil temperature is affected coefficient be multiplied with described first influence time, it is thus achieved that the first correction time；
According to described first object oil mass, described first correction time and the second feature Map table prestoring,
Determining described first benchmark correction oil mass, wherein, described second feature Map table includes oil mass, correction time
Corresponding relation with benchmark correction oil mass；
Described affect coefficient, described i+1 time injection according to described second hydraulic delay time, described oil temperature
The second target oil mass, the second time interval of described i+1 time injection and described the i-th+2 times injections, really
The second benchmark correction oil mass to described the i-th+2 times injections for the fixed described i+1 time injection, comprising:
Described second hydraulic delay time, described second time interval are added, it is thus achieved that the second influence time,
Described second influence time represents that described i+1 time injection sprays, to described the i-th+2 times, the duration impacting；
Described oil temperature is affected coefficient be multiplied with described second influence time, it is thus achieved that the second correction time；
According to described second target oil mass, described second correction time and described second feature Map table,
Determine described second benchmark correction oil mass.
Further, described according to described first correction oil mass and described second correction oil mass, to described i-th+2
The target oil mass of secondary injection compensates, comprising:
Described first correction oil mass and described second correction oil mass are added, it is thus achieved that compensate oil mass；
It if described compensation oil mass is more than the first preset correction value, and is less than the second preset correction value, according to described
Compensate oil mass to compensate described 3rd target oil mass.
In prior art, for multi-injection above twice, only consider the oil mass between adjacent injection twice
Influence of fluctuations.On the one hand, the oil mass fluctuation in the multi-injection more than twice, between adjacent injection twice
May not have clear and definite regularity；On the other hand, in the multi-injection more than twice, the spray twice being separated by
Also can influence each other between penetrating.Therefore, mend only in accordance with the oil mass fluctuation that the adjacent data sprayed twice are set up
Repay model inaccuracy, and then compensate according to the oil mass to rear injection for the oil mass oscillation compensation model, meeting
Make differing greatly between actual ejection oil mass and target oil mass.And the repeatedly spray described in the embodiment of the present invention
Penetrate oil mass compensation method and not only allow for the oil mass fluctuation between adjacent injection twice, it is also contemplated that be separated by two
Oil mass influence of fluctuations between secondary injection.Therefore, compared to prior art only in accordance with the adjacent number spraying twice
Spray the method compensating according to the oil mass oscillation compensation model set up to rear time, described in the embodiment of the present invention
Multi-injection oil mass compensation method the every time injection oil mass in engine operational cycle more can be as the criterion
Really compensate, so that the desired value that actual ejection oil mass gives close to ECU, thus ensure that engine torque is defeated
The stability going out and the emission performance of engine.
Another object of the present invention is to propose a kind of multi-injection fuel quantity compensator, at least to solve to start
When machine is operated in repeatedly under the injection mode that (more than twice) sprays, due to existing oil mass oscillation compensation mould
The oil mass difference problem that type is precisely caused not, can be to the injection oil mass every time in engine operational cycle
Accurately compensate for, so that the desired value that actual ejection oil mass gives close to ECU, thus ensure engine
The stability of moment of torsion output and the emission performance of engine.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of multi-injection fuel quantity compensator, comprising: revise oil mass determining unit, compensating unit；
Described correction oil mass determining unit, for determining the first correction to the i-th+2 times injections for the i & lt injection
Oil mass and the second correction oil mass to described the i-th+2 times injections for the i+1 time injection, wherein, i takes 1 to N-2
Between all integers, N is the injecting times of fuel injector in the circulation of engine one action；
Described compensating unit, for according to described first correction oil mass and described second correction oil mass, to described
The target oil mass of the i-th+2 times injections compensates.
Further, described device also includes: hydraulic delay time determining unit, oil temperature affect coefficient and determine
Unit；
In described correction oil mass determining unit, described hydraulic delay time determining unit, for determining that i & lt is sprayed
Penetrate the first correction oil mass to the i-th+2 times injections and i+1 time injection second to described the i-th+2 times injections to repair
Before positive oil mass, determine that the first hydraulic delay time, described i+1 time that described i & lt spray spray
Second hydraulic delay time；
Described oil temperature affects factor determination unit, before passing through fuel filter according to engine water temperature and fuel oil
Temperature value, determines that oil temperature affects coefficient, and described oil temperature affects coefficient and represents fuel oil temperature to fuel density and combustion
The influence degree of oil pressure；
Described correction oil mass determining unit specifically includes: benchmark correction oil mass determining module, correction factor determine
Module, correction oil mass computing module；
Described benchmark correction oil mass determining module, for according to described first hydraulic delay time, described oil temperature
Affect coefficient, the first object oil mass of described i & lt injection, the injection of described i & lt and described i+1 time spray
The very first time interval penetrated, determines the first benchmark correction to described the i-th+2 times injections for the described i & lt injection
Oil mass；And, affect coefficient, described i+1 time according to described second hydraulic delay time, described oil temperature
Time injection of second target oil mass of injection, described i+1 and the second time interval of described the i-th+2 times injections,
Determine the second benchmark correction oil mass to described the i-th+2 times injections for the described i+1 time injection；
Described correction factor determining module, for according to described first object oil mass, determines the first correction factor,
Described first correction factor represents that oil mass that described i & lt sprays affects coefficient to described the i-th+2 times injections；
And, the 3rd target oil mass according to described the i-th+2 times injections, the common rail pressure of described i+1 time injection,
Determining the second correction factor, described second correction factor represents described 3rd target oil mass to described the i-th+2 times
That sprays affects coefficient；
Described correction oil mass computing module, for revising system by described first benchmark correction oil mass and described first
Number is multiplied, it is thus achieved that described first correction oil mass；And, by described second benchmark correction oil mass and described second
Correction factor is multiplied, it is thus achieved that described second correction oil mass.
Further, described hydraulic delay time determining unit specifically includes: control instruction receiver module, mesh
Mark oil mass determining module, common rail pressure acquisition module, hydraulic delay time determining module；
Described control instruction receiver module, is used for receiving control instruction, wherein, comprises in described control instruction
Described first object oil mass, described second target oil mass；
Described target oil mass determining module, for according to described control instruction, determine described first object oil mass,
Described second target oil mass；
Described common rail pressure acquisition module, for obtaining the common rail pressure of described i & lt injection；
Described hydraulic delay time determining module, for spraying according to described first object oil mass, described i & lt
The common rail pressure penetrated and the fisrt feature prestoring map Map table, determine the described first hydraulic delay time,
Wherein, described fisrt feature Map table includes the corresponding relation of oil mass, common rail pressure and hydraulic delay time；
Described common rail pressure acquisition module, is additionally operable to obtain the common rail pressure of described i+1 time injection；
Described hydraulic delay time determining module, is additionally operable to according to described second target oil mass, described i+1
The common rail pressure of secondary injection and described fisrt feature Map table, determine the described second hydraulic delay time.
Further, described benchmark correction oil mass determining module specifically for:
Described first hydraulic delay time, the described very first time are spaced and are added, it is thus achieved that the first influence time,
Described first influence time represents that the injection of described i & lt sprays, to described the i-th+2 times, the duration impacting；
Described oil temperature is affected coefficient be multiplied with described first influence time, it is thus achieved that the first correction time；
According to described first object oil mass, described first correction time and the second feature Map table prestoring,
Determining described first benchmark correction oil mass, wherein, described second feature Map table includes oil mass, correction time
Corresponding relation with benchmark correction oil mass；
Described benchmark correction oil mass determining module is specifically additionally operable to:
Described second hydraulic delay time, described second time interval are added, it is thus achieved that the second influence time,
Described second influence time represents that described i+1 time injection sprays, to described the i-th+2 times, the duration impacting；
Described oil temperature is affected coefficient be multiplied with described second influence time, it is thus achieved that the second correction time；
According to described second target oil mass, described second correction time and described second feature Map table,
Determine described second benchmark correction oil mass.
Further, described compensating unit specifically includes: compensate oil mass computing module, compensating module；
Described compensation oil mass computing module, for by described first correction oil mass and described second correction oil mass phase
Add, it is thus achieved that compensate oil mass；
Described compensating module is if being more than the first preset correction value for described compensation oil mass and pre-less than second
If correction value, according to described compensation oil mass, described 3rd target oil mass is compensated.
Described multi-injection fuel quantity compensator and above-mentioned multi-injection oil mass compensation method are relative to prior art
Had the advantage that identical, do not repeated them here.
Brief description
A part of accompanying drawing constituting the present invention is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.At accompanying drawing
In:
Fig. 1 is high-pressure common-rail fuel system structure chart；
Fig. 2 is the multi-injection oil mass compensation method schematic flow sheet one described in the embodiment of the present invention；
Fig. 3 is the signal that the multi-injection oil mass compensation method described in the embodiment of the present invention is applied to three injections
Figure；
Fig. 4 is the signal that the multi-injection oil mass compensation method described in the embodiment of the present invention is applied to four injections
Figure；
Fig. 5 is the multi-injection oil mass compensation method schematic flow sheet two described in the embodiment of the present invention；
Fig. 6 is the Map figure of oil mass, benchmark correction oil mass and correction time；
Fig. 7 is the multi-injection oil mass compensation method schematic flow sheet three described in the embodiment of the present invention；
Fig. 8 is the multi-injection oil mass compensation method schematic flow sheet four described in the embodiment of the present invention；
Fig. 9 is the multi-injection oil mass compensation method principle schematic described in the embodiment of the present invention；
Figure 10 is the multi-injection fuel quantity compensator structural representation one described in the embodiment of the present invention；
Figure 11 is the multi-injection fuel quantity compensator structural representation two described in the embodiment of the present invention；
Figure 12 is the multi-injection fuel quantity compensator structural representation three described in the embodiment of the present invention；
Figure 13 is the multi-injection fuel quantity compensator structural representation four described in the embodiment of the present invention.
Description of reference numerals:
1-fuel tank, 2-fuel filter, 3-high-pressure oil pump, 4-gate gurgle valve, 5-high-pressure oil pipe, 6-common rail pipe,
7-pressure sensor, 8-fuel injector, 9-ECU, 10-sensor.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment
Can be mutually combined.
In addition, for the ease of the technical scheme clearly describing the embodiment of the present invention, in an embodiment of the present invention,
Have employed the printed words such as " first ", " second " to carry out function with the essentially identical identical entry of effect or similar item
Distinguish, it will be appreciated by those skilled in the art that the printed words such as " first ", " second " not to quantity and perform secondary
Sequence is defined.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
For ease of understanding the present invention, first combine the high-pressure common-rail fuel system structure chart shown in Fig. 1, to send out
The operation principle of motivation fuel system is briefly discussed below:
As it is shown in figure 1, the fuel oil in fuel tank 1 is sucked into fuel filter 2 in figure, a portion is fired
Oil forms high pressure fuel in the plunger cavity pressurization of high-pressure oil pump 3, and flows through from the fuel-displaced valve port of high-pressure oil pump 3
High-pressure oil pipe 5 merges into common rail pipe 6, and the high-pressure injection for fuel injector 8 provides stable, lasting high compression ignition
Oil sources, and a part of unnecessary fuel oil flows at the overflow valve of high-pressure oil pump 3 together with the oil return of fuel injector 8
Oil return box 1；High pressure fuel flows to the fuel injector 8 of each cylinder of engine respectively from common rail pipe 6 through high-pressure oil pipe 5；
Fuel oil is sprayed into the combustion of each cylinder by pulse given time that fuel injector 8 exports according to ECU9 and given width
Burn in room.Common rail pipe 6 one end is equipped with fuel pressure transmitter 7, can monitor the fuel oil in common rail pipe 6 in real time
Pressure condition, when fuel pressure exceedes the maximum of permission, gate gurgle valve 4 is opened, the fuel oil in common rail pipe
Pressure is rapidly decreased in safe range, to ensure the safety of whole system.ECU9 gathers each sensor
The engine of 10 detections in real time and the state parameter of common rail system, send essence by control strategy and reservoir data
True current pulse signal, and make corresponding common rail pump magnetic valve, fuel injector magnetic system etc. produce electromagnetic force,
To drive corresponding actuator to carry out action, regulate fuel delivery, common rail pressure, oil spout angle and distributive value etc.,
So that engine calibration work.
Fig. 2 show the flow process signal of a kind of multi-injection oil mass compensation method that the embodiment of the present invention provides
Figure.Seeing Fig. 2, described method includes:
S201, multi-injection fuel quantity compensator determine the first correction to the i-th+2 times injections for the i & lt injection
Oil mass and the second correction oil mass to the i-th+2 times injections for the i+1 time injection.
Wherein, i takes all integers between 1 to N-2, and N is fuel injector in the circulation of engine one action
Injecting times.
S202, multi-injection fuel quantity compensator are according to the first correction oil mass and the second correction oil mass, to i-th+2
The target oil mass of secondary injection compensates.
It should be noted that for three injections, as it is shown on figure 3, the repeatedly spray described in the embodiment of the present invention
Penetrate the impact that oil mass compensation method only needs to consider the 1st injection, spray for the 3rd injection for the 2nd time, because of
Only the target oil mass of the 3rd injection is compensated in one working cycles of this engine；And for
The multi-injection of more than three times, every three adjacent injections all need to perform an oil mass and compensate, for example, for four
Secondary injection, needs the impact considering the 1st injection, spraying for the 3rd injection for the 2nd time, and the 2nd
The impact that secondary injection, the 3rd injection are sprayed for the 4th, specifically as shown in Figure 4.Therefore, for four
Secondary injection, needs to compensate the target oil mass of the 3rd injection and the 4th injection respectively.
Therefore, for multi-injection above twice, the multi-injection oil mass described in the embodiment of the present invention
Compensation method not only allows for the oil mass fluctuation between adjacent injection twice, it is also contemplated that the injection twice that is separated by
Between oil mass influence of fluctuations.Therefore, built only in accordance with the adjacent data sprayed twice compared to prior art
Vertical oil mass oscillation compensation model sprays, to rear time, the method compensating, described in the embodiment of the present invention repeatedly
The oil mass of injection every time in engine operational cycle can more precisely be mended by injection oil mass compensation method
Repay, so that the desired value that actual ejection oil mass gives close to ECU, thus it is steady to ensure that engine torque exports
The qualitative emission performance with engine.
Preferably, as it is shown in figure 5, the embodiment of the present invention provide multi-injection oil mass compensation method in,
Multi-injection fuel quantity compensator determines that i & lt injection revises oil mass and i+1 to the first of the i-th+2 times injections
Before secondary injection is to the second correction oil mass of the i-th+2 times injections, can also include:
S203, multi-injection fuel quantity compensator determine the first hydraulic delay time, i+1 that i & lt sprays
The second hydraulic delay time of secondary injection.
It should be noted that affected by fuel injector structure characteristic, the open and close time of injection is all every time
Certain time delay can occur, and hydraulic pressure is prolonged by the multi-injection oil mass compensation method that therefore embodiment of the present invention provides
The slow time is taken into account for the influence of fluctuations of oil mass.
Before S204, multi-injection fuel quantity compensator pass through fuel filter according to engine water temperature and fuel oil
Temperature value, determines that oil temperature affects coefficient.
Wherein, oil temperature affects coefficient and represents the influence degree to fuel density and fuel pressure for the fuel oil temperature.
Affect it should be noted that fuel density and fuel pressure can be produced by fuel oil temperature, and fuel density
The emitted dose of fuel oil can be affected again with fuel pressure.Accordingly, it would be desirable to take the impact of fuel oil temperature into account,
But based on prior art, it is difficult to directly obtain the temperature of the fuel oil entering in fuel injector.Thus, the present invention is real
Execute the multi-injection oil mass compensation method that example provides, by considering water temperature and the fuel filter of engine
The impact on fuel density and fuel pressure for the front temperature value (i.e. oil temperature before combustion filter), obtains fuel oil indirectly
Temperature is for the impact of fuel density and fuel pressure, thus the shadow that fuel oil temperature is fluctuated for injection oil mass
Ring and take into account.
Concrete, before fuel filter can being passed through by platform experiment monitoring engine water temperature, fuel oil in advance
Temperature value, the dynamic change of actual ejection oil mass, obtain the variation relation of three, and then close according to this change
System determines that engine water temperature, fuel oil affect the corresponding pass of coefficient by the temperature value before fuel filter and oil temperature
System, and store this corresponding relation.When performing method of the present invention, first pass through temperature sensor and record
Engine water temperature and fuel oil obtain oil by the temperature value before fuel filter, the corresponding relation further according to storage
Temperature affects coefficient.This is not especially limited by the embodiment of the present invention.
Multi-injection fuel quantity compensator determine i & lt injection to the i-th+2 times injection first correction oil mass and
Second correction oil mass (i.e. S201) to the i-th+2 times injections for the i+1 time injection, specifically may include that
S201a, multi-injection fuel quantity compensator according to the first hydraulic delay time, oil temperature affect coefficient,
The first object oil mass of i injection, the very first time interval of i & lt injection and i+1 time injection, determine the
The first benchmark correction oil mass to the i-th+2 times injections for i the injection；And, according to the second hydraulic delay time,
Oil temperature affects coefficient, the second target oil mass of i+1 time injection, i+1 time injection and the i-th+2 times injections
Second time interval, determines the second benchmark correction oil mass to the i-th+2 times injections for the i+1 time injection.
S201b, multi-injection fuel quantity compensator, according to first object oil mass, determine the first correction factor；With
And, the 3rd target oil mass according to the i-th+2 times injections, the common rail pressure of i+1 time injection, determine second
Correction factor.
Wherein, the first correction factor represents that oil mass that i & lt sprays affects coefficient to the i-th+2 times injections,
Second correction factor represent the 3rd target oil mass on the i-th+2 times injection affect coefficient.
First benchmark correction oil mass is multiplied by S201c, multi-injection fuel quantity compensator with the first correction factor,
Obtain the first correction oil mass；And, the second benchmark correction oil mass is multiplied with the second correction factor, it is thus achieved that the
Two correction oil masses.
Preferably, in step S201a, multi-injection fuel quantity compensator according to the first hydraulic delay time,
Oil temperature affects coefficient, the first object oil mass of i & lt injection, i & lt injection and the first of i+1 time injection
Time interval, determines the first benchmark correction oil mass to the i-th+2 times injections for the i & lt injection, specifically can wrap
Include:
First hydraulic delay time, the very first time are spaced and are added by multi-injection fuel quantity compensator, it is thus achieved that the
One influence time, the first influence time represents that i & lt injection sprays, to the i-th+2 times, the duration impacting；
Oil temperature is affected coefficient by multi-injection fuel quantity compensator and the first influence time is multiplied, it is thus achieved that first repaiies
The positive time；
Multi-injection fuel quantity compensator according to first object oil mass, the first correction time and prestore
Two feature Map tables, determine the first benchmark correction oil mass.
Wherein, second feature Map table includes the corresponding relation of oil mass, correction time and benchmark correction oil mass.
Second feature Map table specifically can be by the Map figure (ginseng between oil mass, correction time and benchmark correction oil mass
See Fig. 6) obtain, described Map figure then can be obtained by platform experiment in advance, and the embodiment of the present invention is to this not
Make concrete restriction.
Be similar to, multi-injection fuel quantity compensator according to the second hydraulic delay time, oil temperature affect coefficient,
Second time interval of the second target oil mass of i+1 time injection, i+1 time injection and the i-th+2 times injections,
Determine the second benchmark correction oil mass to the i-th+2 times injections for the i+1 time injection, specifically may include that
Second hydraulic delay time, the second time interval are added by multi-injection fuel quantity compensator, it is thus achieved that the
Two influence times, the second influence time represents that i+1 time injection sprays, to the i-th+2 times, the duration impacting；
Oil temperature is affected coefficient by multi-injection fuel quantity compensator and the second influence time is multiplied, it is thus achieved that second repaiies
The positive time；
Multi-injection fuel quantity compensator is according to the second target oil mass, the second correction time and second feature
Map table, determines the second benchmark correction oil mass.
Preferably, in step S201b, multi-injection fuel quantity compensator, according to first object oil mass, determines
First correction factor, specifically may include that
Multi-injection fuel quantity compensator is according to first object oil mass, and the oil mass prestoring revises system with first
The corresponding relation of number, determines the first correction factor.
Multi-injection fuel quantity compensator sprays according to the 3rd target oil mass, the i+1 time of the i-th+2 times injections
Common rail pressure, determine the second correction factor, specifically may include that
Multi-injection fuel quantity compensator according to the 3rd target oil mass, i+1 time injection common rail pressure, with
And the third feature Map table prestoring, determine the second correction factor.
Wherein, third feature Map table includes the corresponding relation of oil mass, common rail pressure and the second correction factor.
In addition, it should be noted that, the corresponding relation of oil mass and the first correction factor can be specifically oil mass with
The functional relation linearly or nonlinearly of the first correction factor, and can be obtained by platform experiment in advance, tool
The process that body process affects coefficient with aforementioned determination oil temperature is similar, and here is omitted.
Preferably, as it is shown in fig. 7, the embodiment of the present invention provide multi-injection oil mass compensation method in, many
Secondary injection fuel quantity compensator determine that the first hydraulic delay time, i+1 time that i & lt spray sprays the
The two hydraulic delay times (i.e. S203), specifically may include that
S203a, multi-injection fuel quantity compensator receive control instruction, and determine the first mesh according to control instruction
Mark oil mass, the second target oil mass, wherein, comprise first object oil mass, the second target oil mass in control instruction.
S203b, multi-injection fuel quantity compensator obtain the common rail pressure of i & lt injection, and according to the first mesh
Mark oil mass, the common rail pressure of i & lt injection and the fisrt feature Map table prestoring, determine the first hydraulic pressure
Time delay.
Wherein, fisrt feature Map table includes the corresponding relation of oil mass, common rail pressure and hydraulic delay time.
S203c, multi-injection fuel quantity compensator obtain the common rail pressure of i+1 time injection, and according to second
The common rail pressure of target oil mass, i+1 time injection and fisrt feature Map table, determine that the second hydraulic pressure prolongs
The slow time.
Concrete, as shown in Figure 8, in the multi-injection oil mass compensation method that the embodiment of the present invention provides, many
Secondary injection fuel quantity compensator is according to the first correction oil mass and the second correction oil mass, the mesh to the i-th+2 times injections
Mark oil mass compensates (i.e. S202), specifically may include that
First correction oil mass and the second correction oil mass are added by S202a, multi-injection fuel quantity compensator, it is thus achieved that
Compensate oil mass.
If S202b compensates oil mass is more than the first preset correction value, and is less than the second preset correction value, repeatedly spray
Penetrate fuel quantity compensator and according to compensating oil mass, the 3rd target oil mass is compensated.
Wherein, the maximum modified value that the first preset correction value is allowed by system, the second preset correction value is for being
Unite allowed minimum correction value, and the first preset correction value and the second preset correction value specifically can be rule of thumb
Obtaining, this is not especially limited by the embodiment of the present invention.
So, when the parameter of system malfunctions or compensation device acquisition is incorrect, and then cause finally calculating
During the compensation oil mass mistake of gained, Error Compensation can be avoided, it is ensured that the security of system.
Exemplary, in conjunction with above-mentioned specific embodiments, provide the repeatedly spray using the embodiment of the present invention to provide
Penetrate oil mass compensation method and carry out the specific example of oil mass compensation as follows (its principle is as shown in Figure 9):
S1, according to control instruction, obtain very first time interval, first object oil mass, the first common rail pressure,
Second time interval, the second target oil mass, the second common rail pressure and the 3rd target oil mass；According to temperature
Sensor, obtains engine water temperature, the front oil temperature of combustion filter.
S2, according to first object oil mass, the first common rail pressure and fisrt feature Map table, determine the first hydraulic pressure
Time delay, and the first hydraulic delay time was added with very first time interval, obtain the first influence time.
S3, according to the second target oil mass, the second common rail pressure and second feature Map table, determine the second hydraulic pressure
Time delay, and the second hydraulic delay time was added with the second time interval, obtain the second influence time.
S4, according to engine water temperature and combustion filter before oil temperature, determine that oil temperature affects coefficient.
It S5, oil temperature is affected coefficient is multiplied with the first influence time, the second influence time respectively, obtain first
Correction time, the second correction time.
S6, according to the first correction time, first object oil mass and second feature Map table, determine the first benchmark
Revise oil mass.
S7, according to the second correction time, the second target oil mass and second feature Map table, determine the second benchmark
Revise oil mass.
S8, according to first object oil mass, determine the first correction factor.
S9, according to the 3rd target oil mass, the second common rail pressure and third feature Map table, determine second
Correction factor.
S10, the first benchmark correction oil mass is multiplied with the first correction factor, obtains the first correction oil mass.
S11, the second benchmark correction oil mass is multiplied with the second correction factor, obtains the second correction oil mass.
S12, by first correction oil mass with second revise oil mass be added, be compensated oil mass.
If S13 compensates oil mass is more than the first preset correction value, and is less than the second preset correction value, according to compensation
3rd target oil mass is compensated by oil mass.
So far, oil mass compensates and terminates.Certainly, above-mentioned example is only that the embodiment of the present invention provides preferably
Embodiment, the invention is not restricted to this.
In prior art, for multi-injection above twice, only consider the oil mass between adjacent injection twice
Influence of fluctuations.On the one hand, the oil mass fluctuation in the multi-injection more than twice, between adjacent injection twice
May not have clear and definite regularity；On the other hand, in the multi-injection more than twice, the spray twice being separated by
Also can influence each other between penetrating.Therefore, mend only in accordance with the oil mass fluctuation that the adjacent data sprayed twice are set up
Repay model inaccuracy, and then compensate according to the oil mass to rear injection for the oil mass oscillation compensation model, meeting
Make differing greatly between actual ejection oil mass and target oil mass.And the repeatedly spray described in the embodiment of the present invention
Penetrate oil mass compensation method and not only allow for the oil mass fluctuation between adjacent injection twice, it is also contemplated that be separated by two
Oil mass influence of fluctuations between secondary injection.Therefore, compared to prior art only in accordance with the adjacent number spraying twice
Spray the method compensating according to the oil mass oscillation compensation model set up to rear time, described in the embodiment of the present invention
Multi-injection oil mass compensation method the every time injection oil mass in engine operational cycle more can be as the criterion
Really compensate, so that the desired value that actual ejection oil mass gives close to ECU, thus ensure that engine torque is defeated
The stability going out and the emission performance of engine.
Figure 10 show a kind of multi-injection fuel quantity compensator 100 structural representation that the embodiment of the present invention provides
Figure, comprising: revise oil mass determining unit the 1001st, compensating unit 1002.
Wherein, oil mass determining unit 1001 is revised, for determining i & lt injection the to the i-th+2 times injections
One correction oil mass and the second correction oil mass to the i-th+2 times injections for the i+1 time injection.
Wherein, i takes all integers between 1 to N-2, and N is fuel injector in the circulation of engine one action
Injecting times.
Compensating unit 1002, for according to the first correction oil mass and the second correction oil mass, spraying to the i-th+2 times
Target oil mass compensate.
Further, as shown in figure 11, the multi-injection fuel quantity compensator 100 described in the embodiment of the present invention
Can also include: hydraulic delay time determining unit the 1003rd, oil temperature affects factor determination unit 1004.
Wherein, hydraulic delay time determining unit 1003, for determining in correction oil mass determining unit 1001
I & lt injection to the first correction oil mass of the i-th+2 times injections and i+1 time injection to the i-th+2 times injections the
Before two correction oil masses, determine that the first hydraulic delay time, i+1 time that i & lt spray sprays second
The hydraulic delay time；
Oil temperature affects factor determination unit 1004, before passing through fuel filter according to engine water temperature and fuel oil
Temperature value, determines that oil temperature affects coefficient, and oil temperature affects coefficient and represents fuel oil temperature to fuel density and fuel oil pressure
The influence degree of power.
Then, revise oil mass determining unit 1001 specifically may include that benchmark correction oil mass determining module 1001a,
Correction factor determining module 1001b, correction oil mass computing module 1001c.
Wherein, benchmark correction oil mass determining module 1001a, for according to the first hydraulic delay time, oil temperature
Affect coefficient, the first object oil mass of i & lt injection, the very first time of i & lt injection secondary injection with i+1
Interval, determines the first benchmark correction oil mass to the i-th+2 times injections for the i & lt injection；And, according to second
Hydraulic delay time, oil temperature affect coefficient, the second target oil mass of i+1 time injection, i+1 time injection
With the second time interval of the i-th+2 times injections, determine the second benchmark to the i-th+2 times injections for the i+1 time injection
Revise oil mass；
Correction factor determining module 1001b, for according to first object oil mass, determines the first correction factor,
First correction factor represents that oil mass that i & lt sprays affects coefficient to the i-th+2 times injections；And, according to
The common rail pressure of the 3rd target oil mass of the i-th+2 times injections, i+1 time injection, determines the second correction factor,
Second correction factor represent the 3rd target oil mass on the i-th+2 times injection affect coefficient；
Revise oil mass computing module 1001c, for being multiplied the first benchmark correction oil mass with the first correction factor,
Obtain the first correction oil mass；And, the second benchmark correction oil mass is multiplied with the second correction factor, it is thus achieved that the
Two correction oil masses.
Further, as shown in figure 12, the multi-injection fuel quantity compensator 100 described in the embodiment of the present invention
In, hydraulic delay time determining unit 1003 specifically includes: control instruction receiver module 1003a, target oil
Amount determining module 1003b, common rail pressure acquisition module 1003c, hydraulic delay time determining module 1003d.
Control instruction receiver module 1003a, is used for receiving control instruction, wherein, comprises in control instruction
One target oil mass, the second target oil mass；
Target oil mass determining module 1003b, for according to control instruction, determine first object oil mass, second
Target oil mass；
Common rail pressure acquisition module 1003c, for obtaining the common rail pressure of i & lt injection；
Hydraulic delay time determining module 1003d, for the common rail sprayed according to first object oil mass, i & lt
Pressure and the fisrt feature prestoring map Map table, determine the first hydraulic delay time, wherein, first
Feature Map table includes the corresponding relation of oil mass, common rail pressure and hydraulic delay time；
Common rail pressure acquisition module 1003c, is additionally operable to obtain the common rail pressure of i+1 time injection；
Hydraulic delay time determining module 1003d, is additionally operable to spray according to the second target oil mass, i+1 time
Common rail pressure and fisrt feature Map table, determined for the second hydraulic delay time.
Preferably, benchmark correction oil mass determining module 1001a specifically for:
First hydraulic delay time, the very first time are spaced and are added, it is thus achieved that the first influence time, the first impact
Time represents that i & lt injection sprays, to the i-th+2 times, the duration impacting；
Oil temperature is affected coefficient and the first influence time is multiplied, it is thus achieved that the first correction time；
According to first object oil mass, the first correction time and the second feature Map table prestoring, determine
One benchmark correction oil mass, wherein, second feature Map table includes oil mass, correction time and benchmark correction oil mass
Corresponding relation.
Benchmark correction oil mass determining module 1001a is specifically additionally operable to:
Second hydraulic delay time, the second time interval are added, it is thus achieved that the second influence time, the second impact
Time represents that i+1 time injection sprays, to the i-th+2 times, the duration impacting；
Oil temperature is affected coefficient and the second influence time is multiplied, it is thus achieved that the second correction time；
According to the second target oil mass, the second correction time and second feature Map table, determine the second benchmark
Revise oil mass.
Preferably, correction factor determining module 1001b specifically for:
According to first object oil mass, and the corresponding relation of the oil mass prestoring and the first correction factor, determine the
One correction factor；
Correction factor determining module 1001b is specifically additionally operable to:
According to the 3rd target oil mass, the common rail pressure of i+1 time injection and third feature Map prestoring
Table, determines the second correction factor, and wherein, third feature Map table includes that oil mass, common rail pressure and second are repaiied
The corresponding relation of positive coefficient.
Further, as shown in figure 13, the multi-injection fuel quantity compensator 100 described in the embodiment of the present invention
In, compensating unit 1002 specifically includes: compensate oil mass computing module 1002a, compensating module 1002b.
Wherein, oil mass computing module 1002a is compensated, for by the first correction oil mass and the second correction oil mass phase
Add, it is thus achieved that compensate oil mass.
Compensating module 1002b, if being more than the first preset correction value for compensating oil mass, and presets less than second
Correction value, compensates to the 3rd target oil mass according to compensating oil mass.
Concrete, use the multi-injection fuel quantity compensator 100 that the embodiment of the present invention provides to target oil mass
The method compensating refers to the aforementioned associated description of the embodiment of the present invention, does not repeats them here.
In prior art, for multi-injection above twice, only consider the oil mass between adjacent injection twice
Influence of fluctuations.On the one hand, the oil mass fluctuation in the multi-injection more than twice, between adjacent injection twice
May not have clear and definite regularity；On the other hand, in the multi-injection more than twice, the spray twice being separated by
Also can influence each other between penetrating.Therefore, mend only in accordance with the oil mass fluctuation that the adjacent data sprayed twice are set up
Repay model inaccuracy, and then compensate according to the oil mass to rear injection for the oil mass oscillation compensation model, meeting
Make differing greatly between actual ejection oil mass and target oil mass.And the repeatedly spray described in the embodiment of the present invention
Penetrate fuel quantity compensator, not only allow for the oil mass fluctuation between adjacent injection twice, it is also contemplated that be separated by
Oil mass influence of fluctuations between injection twice.Therefore, spray twice only in accordance with adjacent compared to prior art
The method that rear injection is compensated by the oil mass oscillation compensation model that data are set up, embodiment of the present invention institute
The oil mass of injection every time in engine operational cycle can be carried out more by the multi-injection fuel quantity compensator stated
Accurately compensate for, so that the desired value that actual ejection oil mass gives close to ECU, thus ensure engine torque
The stability of output and the emission performance of engine.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (10)
1. a multi-injection oil mass compensation method, it is characterised in that described method includes:
Determine i & lt injection to the first correction oil mass of the i-th+2 times injections and i+1 time injection to described the
Second correction oil mass of i+2 injection, wherein, i takes all integers between 1 to N-2, and N is engine
The injecting times of fuel injector in one action circulation；
According to described first correction oil mass and described second correction oil mass, the target to described the i-th+2 times injections
Oil mass compensates.
2. method according to claim 1, it is characterised in that in described determination i & lt injection to the
First correction oil mass of i+2 injection and the second correction oil mass to described the i-th+2 times injections for the i+1 time injection
Before, also include:
Determine the second hydraulic pressure of the first hydraulic delay time, the described i+1 time injection that described i & lt sprays
Time delay, and,
Temperature value before passing through fuel filter according to engine water temperature and fuel oil, determines that oil temperature affects coefficient,
Described oil temperature affects coefficient and represents the influence degree to fuel density and fuel pressure for the fuel oil temperature；
Described determination i & lt injection to the first correction oil mass of the i-th+2 times injections and i+1 time injection to described
Second correction oil mass of the i-th+2 times injections, comprising:
According to described first hydraulic delay time, described oil temperature affect coefficient, the first of the injection of described i & lt
Target oil mass, the injection of described i & lt and the very first time interval of described i+1 time injection, determine described i-th
The first benchmark correction oil mass to described the i-th+2 times injections for the secondary injection；And, prolong according to described second hydraulic pressure
Slow time, described oil temperature affect coefficient, the second target oil mass of described i+1 time injection, described i+1
Second time interval of secondary injection and described the i-th+2 times injections, determines described i+1 time injection to described the
Second benchmark correction oil mass of i+2 injection；
According to described first object oil mass, determining the first correction factor, described first correction factor represents described
The oil mass of i & lt injection affects coefficient to described the i-th+2 times injections；And, according to described the i-th+2 times sprays
The common rail pressure of the 3rd target oil mass penetrated, described i+1 time injection, determines the second correction factor, described
Second correction factor represent described 3rd target oil mass on described the i-th+2 times injection affect coefficient；
Described first benchmark correction oil mass is multiplied with described first correction factor, it is thus achieved that described first revises oil
Amount；And, described second benchmark correction oil mass is multiplied with described second correction factor, it is thus achieved that described second
Revise oil mass.
3. method according to claim 2, it is characterised in that the injection of described determination described i & lt
First hydraulic delay time, the second hydraulic delay time of described i+1 time injection, comprising:
Receive control instruction, and determine described first object oil mass, described second mesh according to described control instruction
Mark oil mass, wherein, comprises described first object oil mass, described second target oil mass in described control instruction；
Obtain the common rail pressure of described i & lt injection, and spray according to described first object oil mass, described i & lt
The common rail pressure penetrated and the fisrt feature prestoring map Map table, determine the described first hydraulic delay time,
Wherein, described fisrt feature Map table includes the corresponding relation of oil mass, common rail pressure and hydraulic delay time；
Obtain the common rail pressure of described i+1 time injection, and according to described second target oil mass, described i+1
The common rail pressure of secondary injection and described fisrt feature Map table, determine the described second hydraulic delay time.
4. according to the method in claim 2 or 3, it is characterised in that described according to described first hydraulic pressure
Time delay, described oil temperature affect coefficient, the first object oil mass of described i & lt injection, the spray of described i & lt
Penetrate the very first time interval with described i+1 time injection, determine the injection of described i & lt to described the i-th+2 times sprays
The the first benchmark correction oil mass penetrated, comprising:
Described first hydraulic delay time, the described very first time are spaced and are added, it is thus achieved that the first influence time,
Described first influence time represents that the injection of described i & lt sprays, to described the i-th+2 times, the duration impacting；
Described oil temperature is affected coefficient be multiplied with described first influence time, it is thus achieved that the first correction time；
According to described first object oil mass, described first correction time and the second feature Map table prestoring,
Determining described first benchmark correction oil mass, wherein, described second feature Map table includes oil mass, correction time
Corresponding relation with benchmark correction oil mass；
Described affect coefficient, described i+1 time injection according to described second hydraulic delay time, described oil temperature
The second target oil mass, the second time interval of described i+1 time injection and described the i-th+2 times injections, really
The second benchmark correction oil mass to described the i-th+2 times injections for the fixed described i+1 time injection, comprising:
Described second hydraulic delay time, described second time interval are added, it is thus achieved that the second influence time,
Described second influence time represents that described i+1 time injection sprays, to described the i-th+2 times, the duration impacting；
Described oil temperature is affected coefficient be multiplied with described second influence time, it is thus achieved that the second correction time；
According to described second target oil mass, described second correction time and described second feature Map table,
Determine described second benchmark correction oil mass.
5. the method according to any one of claim 1-4, it is characterised in that described according to described first
Revise oil mass and described second correction oil mass, the target oil mass of described the i-th+2 times injections is compensated, bag
Include:
Described first correction oil mass and described second correction oil mass are added, it is thus achieved that compensate oil mass；
It if described compensation oil mass is more than the first preset correction value, and is less than the second preset correction value, according to described
Compensate oil mass to compensate described 3rd target oil mass.
6. a multi-injection fuel quantity compensator, it is characterised in that described device includes: revise oil mass true
Cell, compensating unit；
Described correction oil mass determining unit, for determining the first correction to the i-th+2 times injections for the i & lt injection
Oil mass and the second correction oil mass to described the i-th+2 times injections for the i+1 time injection, wherein, i takes 1 to N-2
Between all integers, N is the injecting times of fuel injector in the circulation of engine one action；
Described compensating unit, for according to described first correction oil mass and described second correction oil mass, to described
The target oil mass of the i-th+2 times injections compensates.
7. device according to claim 6, it is characterised in that described device also includes: hydraulic delay
Time determining unit, oil temperature affect factor determination unit；
In described correction oil mass determining unit, described hydraulic delay time determining unit, for determining that i & lt is sprayed
Penetrate the first correction oil mass to the i-th+2 times injections and i+1 time injection second to described the i-th+2 times injections to repair
Before positive oil mass, determine that the first hydraulic delay time, described i+1 time that described i & lt spray spray
Second hydraulic delay time；
Described oil temperature affects factor determination unit, before passing through fuel filter according to engine water temperature and fuel oil
Temperature value, determines that oil temperature affects coefficient, and described oil temperature affects coefficient and represents fuel oil temperature to fuel density and combustion
The influence degree of oil pressure；
Described correction oil mass determining unit specifically includes: benchmark correction oil mass determining module, correction factor determine
Module, correction oil mass computing module；
Described benchmark correction oil mass determining module, for according to described first hydraulic delay time, described oil temperature
Affect coefficient, the first object oil mass of described i & lt injection, the injection of described i & lt and described i+1 time spray
The very first time interval penetrated, determines the first benchmark correction to described the i-th+2 times injections for the described i & lt injection
Oil mass；And, affect coefficient, described i+1 time according to described second hydraulic delay time, described oil temperature
Time injection of second target oil mass of injection, described i+1 and the second time interval of described the i-th+2 times injections,
Determine the second benchmark correction oil mass to described the i-th+2 times injections for the described i+1 time injection；
Described correction factor determining module, for according to described first object oil mass, determines the first correction factor,
Described first correction factor represents that oil mass that described i & lt sprays affects coefficient to described the i-th+2 times injections；
And, the 3rd target oil mass according to described the i-th+2 times injections, the common rail pressure of described i+1 time injection,
Determining the second correction factor, described second correction factor represents described 3rd target oil mass to described the i-th+2 times
That sprays affects coefficient；
Described correction oil mass computing module, for revising system by described first benchmark correction oil mass and described first
Number is multiplied, it is thus achieved that described first correction oil mass；And, by described second benchmark correction oil mass and described second
Correction factor is multiplied, it is thus achieved that described second correction oil mass.
8. device according to claim 7, it is characterised in that described hydraulic delay time determining unit
Specifically include: control instruction receiver module, target oil mass determining module, common rail pressure acquisition module, hydraulic pressure
Time delay determining module；
Described control instruction receiver module, is used for receiving control instruction, wherein, comprises in described control instruction
Described first object oil mass, described second target oil mass；
Described target oil mass determining module, for according to described control instruction, determine described first object oil mass,
Described second target oil mass；
Described common rail pressure acquisition module, for obtaining the common rail pressure of described i & lt injection；
Described hydraulic delay time determining module, for spraying according to described first object oil mass, described i & lt
The common rail pressure penetrated and the fisrt feature prestoring map Map table, determine the described first hydraulic delay time,
Wherein, described fisrt feature Map table includes the corresponding relation of oil mass, common rail pressure and hydraulic delay time；
Described common rail pressure acquisition module, is additionally operable to obtain the common rail pressure of described i+1 time injection；
Described hydraulic delay time determining module, is additionally operable to according to described second target oil mass, described i+1
The common rail pressure of secondary injection and described fisrt feature Map table, determine the described second hydraulic delay time.
9. the device according to claim 7 or 8, it is characterised in that described benchmark correction oil mass determines
Module specifically for:
Described first hydraulic delay time, the described very first time are spaced and are added, it is thus achieved that the first influence time,
Described first influence time represents that the injection of described i & lt sprays, to described the i-th+2 times, the duration impacting；
Described oil temperature is affected coefficient be multiplied with described first influence time, it is thus achieved that the first correction time；
According to described first object oil mass, described first correction time and the second feature Map table prestoring,
Determining described first benchmark correction oil mass, wherein, described second feature Map table includes oil mass, correction time
Corresponding relation with benchmark correction oil mass；
Described benchmark correction oil mass determining module is specifically additionally operable to:
Described second hydraulic delay time, described second time interval are added, it is thus achieved that the second influence time,
Described second influence time represents that described i+1 time injection sprays, to described the i-th+2 times, the duration impacting；
Described oil temperature is affected coefficient be multiplied with described second influence time, it is thus achieved that the second correction time；
According to described second target oil mass, described second correction time and described second feature Map table,
Determine described second benchmark correction oil mass.
10. the device according to any one of claim 6-9, it is characterised in that described compensating unit has
Body includes: compensate oil mass computing module, compensating module；
Described compensation oil mass computing module, for by described first correction oil mass and described second correction oil mass phase
Add, it is thus achieved that compensate oil mass；
Described compensating module is if being more than the first preset correction value for described compensation oil mass and pre-less than second
If correction value, according to described compensation oil mass, described 3rd target oil mass is compensated.
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| CN112879174A (en) * | 2021-01-27 | 2021-06-01 | 东风汽车集团股份有限公司 | Gasoline engine injection mode switching fuel compensation control method and system and storage medium |
| CN114592985A (en) * | 2022-03-21 | 2022-06-07 | 中国第一汽车股份有限公司 | Multi-injection oil injection control method, vehicle and storage medium |
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