CN107084062A - Method and apparatus for running the internal combustion engine sprayed with dual fuel - Google Patents
Method and apparatus for running the internal combustion engine sprayed with dual fuel Download PDFInfo
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- CN107084062A CN107084062A CN201710073946.4A CN201710073946A CN107084062A CN 107084062 A CN107084062 A CN 107084062A CN 201710073946 A CN201710073946 A CN 201710073946A CN 107084062 A CN107084062 A CN 107084062A
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- internal combustion
- combustion engine
- fuel
- compression
- distributing portion
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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
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
-
- 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
- F02D41/3094—Controlling fuel injection the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder
-
- 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
- F02D41/32—Controlling fuel injection of the low pressure type
- F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration
- F02D41/345—Controlling injection timing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
- F02D2700/03—Controlling by changing the compression ratio
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Ignition Timing (AREA)
Abstract
The present invention relates to the method and apparatus for running internal combustion engine, internal combustion engine carries dual fuel distributing and direct fuel distributing based on air inlet pipe, wherein, the fuel quantity being respectively necessary in the fuel distributing based on air inlet pipe and in direct fuel dispensing is calculated by amount distribution, and variable compression of the internal combustion engine also with the fuel/air mixture at least one combustion chamber of internal combustion engine, wherein, especially provide, detect（405、410）The current service condition of internal combustion engine, including the compression that there is currently（405）Inside, and determine（420）The value for described amount distributed related to the service condition detected.
Description
Technical field
The present invention relates to for run with the fuel/air mixture in dual fuel distributing portion and combustion chamber can
The method and apparatus of the internal combustion engine of the compression of change.A kind of computer program, a kind of machine readable for being used to store the computer program
Data medium and a kind of controller of electronics be also subject of the present invention, by the controller can perform by the present invention
Method.
Background technology
In the dual fuel distributing portion mentioned here, intake manifold injection and the fuel distributing for injecting directly on internal combustion engine
It is coupled or runs parallel in portion.By practice it is known that this internal combustion engine can be configured to dual system, in the dual system
In mixed running, fuel can be abreast by intake manifold injection（SRE）And directly sprayed by fuel oil or fuel（BDE）Press
Sendout is conveyed to the cylinder body of internal combustion engine.Here, sendout, which illustrates that fuel is divided into, to be conveyed to cylinder by intake manifold injection
The fuel quantity of body and the other fuel quantity for being conveyed to cylinder body can be directly sprayed by fuel.
Illustrate for example in the A1 of DE 10 2,010 039 434, in view of operating point, such as load and/or rotating speed
In the case of determine sendout of the internal combustion engine in described mixed running.Therefore it is this to have each sendout pointedly implemented
Mixed running allow for realizing the operation that internal combustion engine is optimal for different service conditions.By using two kinds of spray regimes
Advantage realizes optimal mixture formation and burning.BDE when therefore being run in internal combustion engine dynamic operation or under full load
Advantageously, because it is possible thereby to avoiding the Self-lighting commonly known per se that combustion chamber is inflated（So-called " pinking "）.The opposing party
Face, in SRE, has desirably reduced particle and/or hydrocarbon in internal combustion engine operation at part load（HC）Waste gas
Load.
By the time of ignition that is performed when recognizing pinking before increment type is moved and and then returned to backward
Time of ignition, suppresses or avoids the pinking being previously mentioned with pinking regulation.Earliest possible time of ignition is herein by standard
Fuel is obtained and is stored in performance plot.It is possible thereby to thermodynamically optimize the time trend of burning.
A kind of no so-called dual fuel dispensing portion be it is known that by the A1 of DE 102 58 872 but had in combustion chamber or cylinder
The variable compression of internal fuel/air mixture or the internal combustion engine of variable compression ratio, in this internal combustion engine, bent axle
Position can changeably be adjusted with some by adjustment mechanism with respect to the eccentric hoop that motor body can be reversed, therefore can be changed
Become so-called " minimum cylinder volume " and therefore also have compression ratio.As the alternative of adjustment mechanism, compression ratio can also pass through motor
Body is with respect to the inclination of crankshaft bearing structure or the inclination by the relative motor body of cylinder cap or passes through cylinder cap with respect to motor body
Lift or reduce and be changed.
Variable compression can also be by adjusting by the camshaft of camshaft phase adjuster（Phase adjusted）Or pass through
Switch by the cam of variable valve drive and realize.The compression can also be by being arranged in entering at the cylinder body of internal combustion engine
Change to the closing moment of valve is changed.
Thermodynamic efficiency is improved when can be burnt by described variable compression in partial load region, is derived from
Energy demand advantages and the reduction of CO2 discharges.But with the rise of compression ratio, compression final temperature is also improved, wherein, with
The increase of final temperature is compressed, pinking tendency rises again.Therefore, the compression ratio of maximum possible is by limiting that the pinking of fuel is inclined to
System.Rise in rotating speed and load is straight towards when declining, pinking tendency reduces and therefore can select higher compression.
The content of the invention
The present invention relates to for internal combustion engine referring herein to dual fuel dispensing portion when carry out fuel distribution method
With corresponding device, internal combustion engine has the variable compression in the combustion chamber of internal combustion engine described in fuel/air mixture（Pressure
Gas）.It is based on the recognition herein or technical effect, i.e. the described range of operation having in limitation pinking（The range of operation has
Earlier and therefore have to the more favorable fuel mass conversion ratio of fuel）Interior direct fuel distributing portion（BDE）Combustion
Material spraying system can be as there is the fuel distributing portion based on air inlet pipe（SRE）Fuel injection system operation because BDE fortune
In row, can by the angle of ignition or by time of ignition adjust or control burning center of gravity can select must than in SRE earlier.
The present invention is based on the recognition herein, i.e. the mode in used fuel distributing portion, that is to say, that described
BDE is run or SRE operations, or both and the distribution of described amount combination, the detonation characteristic described in when all to burning has huge
Influence, and therefore for reduce fuel consumption and reduction by burning caused by waste gas discharge provide very big move place.
Cause for the real technology of the effect is that being run in the operating pinking tendencies of BDE compared to SRE can
Thus to reduce, i.e. fuel by fuel directly changeization in combustion chamber and by based on the fuel particle sprayed or
Fuel droplet as the increased turbulent flow produced by BDE runs the kinetic energy brought into, experienced reinforced mixture cooling and because
This experienced faster cooling.This effect is thermodynamically favourable in the operation under higher load first in internal combustion engine
And can especially fuel consumption is diminished.
In the present inventive method based on such solution, i.e. according to the current operating point of internal combustion engine, current pressure
ε is compared in contracting（Yi Pu sirons）, environmental condition and/or before or last burning early stage situation, it is determined that described amount distribution
Suitable or even optimal value.Here, SRE operation in mixture preparation in terms of described in possible advantage with
The described advantage of the higher pinking insensitivity of BDE operations is combined.The described early stage situation of last burning
Also characteristic current and/or that transient response before or internal combustion engine or spraying system are in transient operation is included, here it is
Say, the unexpected torque request for example caused by driver's wish or unexpected load switching.
Especially advise in the present inventive method, existed according to current variable compression or the fuel of dispensing to adjust of calming the anger
Fuel distributing portion based on air inlet pipe（SRE）With direct fuel distributing portion（BDE）Between amount distribution.It is preferred that higher existing
Compression and during simultaneous higher load, described amount distribution is moved along relative to the direction of higher BDE meterings
And additionally more adjust the angle of ignition forward.Here, described technical effect is based on, can in the operating limit of detonability of BDE
To move forward, it is possible thereby to advantageously improve the efficiency of burning in the operation of currently limitation pinking.Here, the angle of ignition is preferred
Do not adjust forward, but being adjusted backward for reducing the inefficient of pinking for the angle of ignition can be cancelled, it is possible thereby to make motor
Run in optimal operating point.
Here, it is noted that in the present invention, the ins and outs when realizing variable compression ratio are unimportant, and
In the present inventive method therefore, it is possible to being technically possible using in all of the variable compression that has advantage described herein
In practice.
Especially provide, detect in the present inventive method（For example read by motor controller）Current compression or pressure
Gas, detection（Equally for example read by described controller）The current load condition of internal combustion engine.If compression and two of load
The value being so detected has exceeded can empirically predetermined threshold value, then amount distribution is along of a relatively high BDE fuel distributings
The direction in portion is changed.
, can also the distribution of the amount of progress as the alternative of the discrete calculating based on the threshold value to amount distribution or matching
It is continuous to calculate or match, more precisely, related to compression ratio.Corresponding value, such as optimal value for amount distribution,
This can be stored in corresponding performance plot, more precisely, related to compression, rotating speed, load etc..
When the compression detected by the operation for internal combustion engine and load described is compared, correlation can be additionally considered
Environmental condition, such as motor and/or intake air temperature because these operational factors have to the detonation characteristic of internal combustion engine it is great
Influence.
In addition, the respective accident analysis of cylinder body can be used in the present inventive method.If for example simultaneously in all cylinder bodies
The middle irregular change that there is compression, then can be inferred that the adjustment for variable compression being for example initially mentioned herein
Defect occurs for mechanism.On the other hand, it can be inferred to when only occurring compression ratio ε irregular deviation in a cylinder body,
Such as scavenging air valve and/or piston ring are blow-by at related cylinder body.
It may further specify that in the present inventive method, the difference of the detonation characteristic and internal combustion engine or spraying system of internal combustion engine
Running status, amount distribution, burning shown early stage situation and/or（Variable）Compressed value is relatively preferably stored in spy
Property figure, with reference to performance plot, using with reference in performance plot etc..The value of storage there can be in a per se known way by suitable
Algorithm learnt in internal combustion engine operation.It is possible thereby in the case of described failure throughput distribute or distribute accordingly because
Number（" division factor "）Fast reaction is made when in view of limit of detonability or corresponding malfunction is resisted.
Can alternatively or additionally by by internal combustion engine continuous operation the limit of detonability currently obtained with storage
In the performance plot（With reference to）Value simply compares and direct derivation goes out in operation in the compression ratio ε that there is currently.Herein
Based on such idea, i.e. throughput is distributed or the change of corresponding allocation factor can obtain compression ratio.
The value of limit of detonability and allocation factor in operating point can relatively be stored in described with compression herein
In performance plot.If people have obtained limit of detonability by the change of allocation factor now, then can be by by expected pinking
The limit derives the compression of current or physical presence compared with the limit of detonability so obtained.
The diagnostic function for described variable compression can be realized with the described way for determining compression ratio ε,
Or the diagnostic function is cyclically performed, such as each operation circulation primary is performed, or only performing when needed, for example, is being deposited
Performed in the combustion problem as pinking or flameout.
Therefore make to realize in the present inventive method as mentioned herein by the matching proposed by allocation factor or movement
There is the operation for being more difficult pinking compared with prior art of the internal combustion engine in dual fuel dispensing portion.Compressed and variable by variable
The combination of the advantage of fuel distribution generally obtains smaller consumption, smaller waste gas discharge and more preferably traveling or operation are relaxed
Appropriateness.As already mentioned, SRE operations contribute to more preferable mixture preparation and BDE operations to contribute to higher herein
Pinking insensitivity.
To for the fuel distributing portion based on air inlet pipe and for direct fuel dispensing portion two fuel quantities press this hair
The bright preferred pin that calculates is performed to each cylinder body of internal combustion engine, more precisely, continuously or one after the other being performed.
The present invention can be used especially in the fuel injection system dual as mentioned herein of the internal combustion engine of motor vehicle.This
Outside, it could be used that in industrial circle, the internal combustion engine of this dual fuel injection of the band for example used in chemical method technology
In.
It is arranged for by the computer program of the present invention, each step of method is performed, particularly when the computer journey
When sequence is run on calculator or controller.This realize can implement on the controller of electronics in the present inventive method, without
Structural change must be made on the controller of this electronics.Therefore, setting a kind of data medium that can be machine-readable, store thereon
The computer program by the present invention.
By running the computer program by the present invention on the controller of electronics, the control of the electronics by the present invention is obtained
Device processed, the controller of the electronics is arranged for, by the control in the internal combustion engine with variable compression in the present inventive method
Make fuel distributing portion dual as mentioned herein.
The other advantages and design of the present invention are drawn by specification and drawings.
Certainly, the foregoing description and following the feature of explaination not can be used only in corresponding illustrated group also
In conjunction, and it can also use in others combination or can be used alone, without departing from the framework of the present invention.
Brief description of the drawings
Fig. 1, which is diagrammatically illustrated, is used for the dual fuel injection device of four-cylinder internal combustion engine by prior art；
Fig. 2 diagrammatically illustrates the time course by prior art fuel injection in fuel air pipe inspection；
Fig. 3 diagrammatically illustrates the time course by prior art fuel injection when fuel directly sprays；
Fig. 4 shows one embodiment in the present inventive method by flow chart；
Fig. 5 is shown by the present invention's（With reference to）One embodiment of performance plot, the performance plot is included according to internal combustion engine or injection
The data of the detonation characteristic for the relevant internal combustion engine that the different running statuses of system are obtained in advance.
Embodiment
Figure 1 illustrates internal combustion engine there are four cylinder bodies 11, the cylinder body is covered by cylinder cap 12.Cylinder cap 12 is in each cylinder body
11 neutralize the border that the reciprocating piston guided in cylinder body 11 being not shown here together defines combustion chamber 13, the combustion chamber
With the entrance 15 for being fed the control of valve 14.Entrance 15 forms the tandem portion of the feeding passage 16 through cylinder cap 12.
Shown fuel injection device includes being used to combustion air being conveyed to the air flow of the combustion chamber 13 of cylinder body 11
Path 18, the inlet air flow path has flow channel 17 separated each other in end side, that passage 16 is fed towards each bar.This
Outside, there is provided injecting fuel directly into first group of Fuelinjection nozzle 19 of each combustion chamber 13 of cylinder body 11 and injecting fuel into
Second group of Fuelinjection nozzle 20 of flow channel 17.
First group of Fuelinjection nozzle 19 of cylinder body 11 is injected directly into, is supplied by high-pressure fuel pump 21, and sprays into flow channel
17 second group of Fuelinjection nozzle 20 is then supplied by fuel low-lift pump 22.The fuel low-lift pump being usually placed in fuel tank 23 exists
Fuel is conveyed to second group of Fuelinjection nozzle 20 by this from the one side of fuel tank 23, is on the other hand then conveyed to high-pressure fuel pump
21.The time for spraying and injection duration of Fuelinjection nozzle 19,20 are by the control list for the electronics being integrated in motor controller
Member is controlled according to the operating point of internal combustion engine, wherein, the fuel injection is basically by first group of Fuelinjection nozzle 19
Complete, and second group of Fuelinjection nozzle 20 is only used as supplement, will pass through first group of Fuelinjection nozzle 19 specific
Range of operation in improve the insufficiency directly sprayed of fuel and utilize the extra free degree or injection strategy.
Second group of Fuelinjection nozzle 20 is configured to multi beam injection valve, they simultaneously spray or spray at least two stocks from
, the fuel cluster that angle staggers each other and by be arranged so that in inlet air flow path 18 sprayed generally have
The fuel cluster 24,25 of spray cone form reaches different flow channels.Provided with two two-beam injection valves in this internal combustion engine
26th, 27, they are placed such in inlet air flow path 18：So that a two-beam injection valve 26 sprays into and leads to first and second
The flow channel 17 of cylinder body 11 and second two-beam injection valve 27 spray into the flow channel 17 towards the third and fourth cylinder body 11.
Flow channel 17 is so constructed for this so that having one between the flow channel 17 of two direct neighbors is used for two-beam injection
The load point of valve 26 or 27.
It should be noted that in the internal combustion engine shown in Fig. 1, each one of arrangement at each of four cylinder bodies 11 mostly
（Show）Fuelinjection nozzle 19 and each one（Two are only shown herein）Two-beam injection valve 26,27.
It is also known that, during the described fuel air pipe inspection for the internal combustion engine mentioned here, air-fuel-mixing
Thing is produced in the external air inlet pipe in combustion chamber.Fuel is ejected into before induction valve by each injection valve herein, wherein, the mixture
Pass through the induction valve flowing in combustion chamber of opening in air inlet system.Fuel supply is completed by fuel delivery module, fuel conveying mould
Fuel quantity needed for having the pressure being defined is conveyed to injection valve by block from storage tank.Air control unit is responsible for internal combustion engine every
Correct air quality is all provided in one operating point.The injection valve being arranged at fuel distributing device is accurate by desired fuel quantity
Ground is metered into air stream.Described motor controller adjusts each required on the basis of the moment of torsion as the reference parameter in center
Air-fuel-mixture.Effective waste gas purification is reached with λ regulations, and the air for adjusting stoichiometry all the time is adjusted by λ
Fuel ratio（λ=1）.
Corresponding to this, when fuel directly sprays, air-fuel-mixture is directly formed in a combustion chamber.Here, new
Fresh air is flowed into by described induction valve, wherein, fuel high pressure（Typically 200 bar）Spray into this burst of air stream.This
Realize the optimal vortex of air-fuel-mixture and the more preferable cooling of combustion chamber.
It is also known that in quartastroke engine（Gasoline motor）In, working cycles include air-breathing, compression, acting, exhaust
Process, wherein, each cylinder body is moved twice and herein in two top dead centres up and down（OT）With two lower dead centers（UT）
In remain static.Therefore the bent axle is implemented to turn round twice in a working cycles, and camshaft then implements rev.
The igniting for the gas-fuel-mixture being brought in cylinder body is carried out in top dead centre, in the top dead centre, mixture just by
Compression.People should be mentioned that igniting top dead centre herein（ZOT）.It is corresponding to this, also there is overlapping top dead centre（ÜOT）, on overlapping
During stop, induction valve and dump valve are all opened when from exhaust transition to air-breathing.
Therefore directly upon actuation at least in cylinder body in all top dead centres（OT）Shi Zhihang lights a fire, wherein, specific
During top dead centre, particularly in each second top dead centre, when crank shaft angle is 720 °, each of time of ignition is carried out respectively and is once moved
It is dynamic.According in top dead centre（OT）When（Now perform time of ignition movement）Or in the case where moving 360 ° of crank shaft angle, air-combustion
Whether material-mixture is real ignited, can be concluded that the reduction of the physics acting carried out in each cylinder body.
In fig. 2, y directions are represented in the crank shaft angle measured with unit " degree "（KW）On enter under the different rotating speeds of internal combustion engine
Capable intake manifold injection.By the four-stroke combustion cycle of gasoline motor principle it is known that being included in the first lower dead center（UT1）,
One top dead centre（OT）, another lower dead center（UT2）And another top dead centre（ZOT）Between crank shaft angle,
In the crank shaft angle, air-fuel present in combustion chamber-mixture thing is ignited.
The reference marker of described time is extremely differently scheduled for two jet paths.Therefore in intake manifold injection
（SRE）When, as schematically shown in fig. 2, in only such as four different rotating speed n=1000,2000,4000 and
During the injection 200 carried out under 7000 U/min, it is contemplated that invariable before being arranged on the end 210 of spraying cycle 225
Time delay share 205 because injection valve be disposed in SRE outside each combustion chamber of internal combustion engine and fuel therefore it is necessary
First enter combustion chamber from injection place.As seen in Figure 2, this extra time demand changes in the rotating speed of internal combustion engine
It is constant when becoming or raising.Therefore injection is accordingly triggered earlier, such as is even also in time in 7000 U/min
Before UT1 after the igniting carried out in ZOT 220 before, therefore when both providing under all rotating speeds invariable
Between demand 205.For the injection window of total time of shown spraying cycle, the bracket drawn is corresponded to as already mentioned
225.Next ZOT references 215 after ZOT 220 before being connected on are marked.
On the other hand, directly sprayed in gasoline（BDE）When, in each injection 300, empirically subscribe（Specifically）Angle
Mark is as reference marker, as schematically shown in figure 3.In other words, with SRE on the contrary, not accounted in BDE
To invariable time quantum, the tendency 305 for example terminated by each injection is found out.Therefore herein can be close to ZOT's 315
Ignition event sprayed and therefore correspondingly more late at the time of on calculated.In current example, follow closely herein
The end 310 of spraying cycle 325 shown in place is the igniting on ensuing ZOT 315.Before this ZOT 315
Time of ignition occurs at ZOT 320 before.
Internal combustion engine is additionally included in the variable compression illustrated in the described A1 of DE 102 58 872 as mentioned herein, at this
During compression, bent axle
It is supported on by eccentric hoop in motor body, eccentric hoop is supported on the carrying in motor body in the way of it can rotate in itself
In bearing.Eccentric hoop can in a controlled manner be rotated by adjustment mechanism, therefore bent axle becomes with respect to the position of motor body
Change.So-called top dead centre of position and piston of the piston in the cylinder body of internal combustion engine in cylinder body（OT）Position therefore change,
And by the piston in piston top dead center position by comprising minimum cylinder volume VC also therefore change.Because the lower dead center of piston
Position correspondingly changes, so stroke capacity VH is constant when crank position is with respect to the change of motor body.Therefore minimum cylinder volume exists
Change when stroke capacity VH is invariable imply that compression ratio ε=（VH + VC）/ VC change.
By variable compression, thermodynamic efficiency is improved when can be burnt in partial load region.As a result, can be with
Reach the reduction of consumption advantage and CO2 discharges.Compression ratio is higher, and compression final temperature is also higher, wherein, with compression most final temperature
Degree increase, combustion chamber inflation is lighted in itself in gasoline motor（Pinking）Risk also rise, so the compression ratio of maximum possible
Limited by the pinking tendency of fuel.
In the duplex system for fuel distributing portion mentioned here, two illustrated shares, that is to say, that SRE parts
Volume and BDE shares, it is known that being combined in the form of system or system unit.Herein, it is especially desirable to which correctly distribution needs to be carried
It is supplying or have total fuel mass to be batched.Total fuel mass KMges compositions for a cylinder body are as follows：
,
Wherein, KMSRERefer to the related fuel mass and KM in SRE pathsBDERefer to the related fuel matter in BDE paths
Amount.The corresponding flow of required fuel mass is next by figure when being sprayed for calculating or distributing in this duplex system
The flow chart explanation shown in 4.
Next the formula illustrated continuously or is one after the other held for all cylinder bodies of internal combustion engine in the present embodiment
OK, more precisely, current for i-th of cylinder body.
After the startup 400 of the formula, the current value of detection compression 405 and the current value of load 410.Additional detections
The parameter of other decision burnings, the environmental condition that particularly there is currently, such as air pressure and/or air themperature, and
These parameters are considered in a subsequent step.Examine in step 415, the compression 405 that is detected and at least another institute
The parameter 410 of detection, is being currently load, if exceeded threshold value empirically predetermined in the preparatory stage respectively.These
Threshold value is so determined：So that the pinking described in when effectively prevent burning.If being unsatisfactory for this condition, then jump back to institute again
State the beginning of formula.
Here, it is noted that as to the alternative of illustrated discrete matching, can also continuously be matched.
If but meeting condition 415, then fuel quantity distribution sprays mobile 420 towards higher BDE, in other words, by
The arithmetic proportion KM that two above-mentioned parameters are drawnBDE / KMSRE, that is, so-called " allocation factor ", it has been enhanced also according to warp
Test a predetermined value.425 can need not be moved rearwards by with over-specification, the time of ignition or the angle of ignition of internal combustion engine.
Then it is to work as on the basis of the allocation factor so changed or on the basis of the fuel quantity by share in BDE paths
I-th preceding of cylinder body performs the BDE injections described in 440 and performs 445 SRE injections for remaining fuel quantity.Under being afterwards
One, that is to say, that the current formula 405-445 performed for i+1 cylinder body illustrated by 450.
It should be noted that amount distribution, the accurate value of the change of time of ignition and accurate threshold value be not currently
It is important, because these values are each related to each internal combustion engine or used fuel distributing portion.
Fig. 5 shows one embodiment of the performance plot by the present invention, is deposited in the performance plot in advance according to internal combustion
The pinking for the relevant internal combustion engine that the different running statuses 500 of machine or spraying system are measured or empirically obtained by test is special
The data 505 of property.Running status includes the value KM that described amount is distributed in this exampleBDE / KMSRE, described compressed value ε with
And the value of the described early stage situation of the burning, more precisely in the present embodiment piston temperature TkValue, originally showing
With " °C " for unit in example.Here, it is noted that piston just heating after a few seconds earliest, and when existing from very little
Motor load to very high motor load load transition when, or even just heating after a few minutes.Here, in high load shape
Piston also colder is soaked by fuel when condition starts, and therefore fuel too slowly gasified, this result in again particulate emission and/or
The raising of HC/CO discharges, more precisely, vaporization time is so long：Until piston is sufficiently heated.
It is also noted that the value being stored in described performance plot of these parameters can also be existed by suitable algorithm
Learnt in internal combustion engine operation.
Therefore can be in the case of the failure shown in Fig. 4 by corresponding to the allocation factor of the amount distribution targetedly
Change quickly to resist corresponding fault state.Can also by the limit of detonability currently obtained in internal combustion engine operation with it is corresponding
The reference value that ground is stored in performance plot compares and derived the compression ratio ε that there is currently.
Illustrated method can be for the form of the control program of the controller for the electronics for controlling internal combustion engine or with one
The control unit of individual or multiple corresponding electronics（ECU）Form realize.
Claims (13)
1. the method for running internal combustion engine, the internal combustion engine has the dual fuel distributing portion based on air inlet pipe（20）With it is direct
Fuel distributing portion（19）, wherein, in the fuel distributing portion based on air inlet pipe and in the direct fuel distributing portion
In, calculate respectively by means of the fuel quantity required for amount distribution, and the internal combustion engine also carries at least one combustion in internal combustion engine
Burn the variable compression of indoor fuel/air mixture, it is characterised in that detection（405、410）Including the pressure that there is currently
Contracting（405）The current service condition of the internal combustion engine inside, and determine（420）It is related to the service condition detected
For the value for the amount distribution being previously mentioned.
2. in accordance with the method for claim 1, it is characterised in that the service condition being previously mentioned of the internal combustion engine, except when
Preceding compression ratio ε（Yi Pu sirons）Outside, the current operating point and/or current load and/or ring of the internal combustion engine are included
Border condition and/or the early stage situation about the burning in each combustion chamber of the internal combustion engine.
3. in accordance with the method for claim 2, it is characterised in that the described early stage situation of the burning includes internal combustion engine
Or the current and/or previous transient response in fuel distributing portion.
4. according to the method described in any one of preceding claims, it is characterised in that detecting first threshold predetermined more than energy
During the compression of value, and additional detections to more than can predetermined Second Threshold load when, the amount distribution by discretely or
Continuously along the direction movement in the BDE fuel distributings portion through raising（420）.
5. in accordance with the method for claim 4, it is characterised in that the current angle of ignition or time of ignition of the internal combustion engine do not have
Have and adjusted backward（425）.
6. according to the method described in any one of preceding claims, it is characterised in that characterize the detonation characteristic of the internal combustion engine
The different running statuses of parameter and internal combustion engine or spraying system, the described early stage situation with amount distribution, with burning and with
（Variable）Compressed value is relatively stored in performance plot.
7. in accordance with the method for claim 6, it is characterised in that by will be quick-fried what is currently obtained in the operation of internal combustion engine
The limit is shaken compared with the knock value being stored in the performance plot, has been inferred in the operation of internal combustion engine there is currently
Compression ratio ε（Yi Pu sirons）.
8. in accordance with the method for claim 7, it is characterised in that the value of the limit of detonability in the operating point of internal combustion engine and point
Value with factor is relatively stored in the performance plot with the compression, the limit of detonability by the change of allocation factor come
Obtain, and pass through the pressure by expected limit of detonability compared with the limit of detonability so obtained relatively to be inferred to physical presence
Contracting.
9. according to the method described in claim 7 or 8, it is characterised in that by determining that compression ratio ε is realized to variable compression
Diagnostic function, the diagnostic function cyclically or when needed performed.
10. according to the method described in any one of preceding claims, it is characterised in that perform each cylinder body for internal combustion engine
For the calculating of the fuel distributing portion based on air inlet pipe and two fuel quantities for direct fuel distributing portion, more specifically
Perform continuously or one after the other the calculating.
11. computer program, it is arranged for performing each step of the method as described in any one of claim 1 to 10
Suddenly.
12. machine readable data medium, stores the computer program as described in claim 11 thereon.
13. the controller of electronics, it is arranged for, and is controlled by the method as described in any one of claim 1 to 10 double
The fuel distributing portion of weight.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016202168.0A DE102016202168A1 (en) | 2016-02-12 | 2016-02-12 | Method and apparatus for operating a dual fuel injection internal combustion engine |
| DE102016202168.0 | 2016-02-12 |
Publications (2)
| Publication Number | Publication Date |
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| CN107084062A true CN107084062A (en) | 2017-08-22 |
| CN107084062B CN107084062B (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710073946.4A Active CN107084062B (en) | 2016-02-12 | 2017-02-10 | Method and device for operating an internal combustion engine with dual fuel injection |
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| Country | Link |
|---|---|
| JP (1) | JP2017141834A (en) |
| CN (1) | CN107084062B (en) |
| DE (1) | DE102016202168A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1667254A (en) * | 2004-03-10 | 2005-09-14 | 丰田自动车株式会社 | Method and apparatus for controlling an internal combustion engine and the internal combustion engine |
| JP2005330943A (en) * | 2004-05-21 | 2005-12-02 | Toyota Motor Corp | Control device of internal combustion engine |
| JP2007211637A (en) * | 2006-02-08 | 2007-08-23 | Toyota Motor Corp | Variable compression ratio internal combustion engine |
| CN104568303A (en) * | 2013-10-25 | 2015-04-29 | 雅马哈发动机株式会社 | Power unit and vehicle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10258872A1 (en) | 2002-12-17 | 2004-07-08 | Robert Bosch Gmbh | Variable compression ratio operation of an internal combustion engine for a motor vehicle, uses inputs from camshaft and crankshaft angle |
| DE102010039434A1 (en) | 2010-08-18 | 2012-02-23 | Robert Bosch Gmbh | Method for determining partition measure in internal combustion engine i.e. petrol engine, involves determining measure by limiting determined operating point-dependent partition measure by restriction of range of functions |
-
2016
- 2016-02-12 DE DE102016202168.0A patent/DE102016202168A1/en active Pending
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2017
- 2017-02-10 CN CN201710073946.4A patent/CN107084062B/en active Active
- 2017-02-10 JP JP2017023058A patent/JP2017141834A/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1667254A (en) * | 2004-03-10 | 2005-09-14 | 丰田自动车株式会社 | Method and apparatus for controlling an internal combustion engine and the internal combustion engine |
| JP2005330943A (en) * | 2004-05-21 | 2005-12-02 | Toyota Motor Corp | Control device of internal combustion engine |
| JP2007211637A (en) * | 2006-02-08 | 2007-08-23 | Toyota Motor Corp | Variable compression ratio internal combustion engine |
| CN104568303A (en) * | 2013-10-25 | 2015-04-29 | 雅马哈发动机株式会社 | Power unit and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017141834A (en) | 2017-08-17 |
| CN107084062B (en) | 2022-03-04 |
| DE102016202168A1 (en) | 2017-08-17 |
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