CN106930848A - Method in the combustion chamber that fuel injection is entered internal combustion engine in negative load power - Google Patents
Method in the combustion chamber that fuel injection is entered internal combustion engine in negative load power Download PDFInfo
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- CN106930848A CN106930848A CN201610914069.4A CN201610914069A CN106930848A CN 106930848 A CN106930848 A CN 106930848A CN 201610914069 A CN201610914069 A CN 201610914069A CN 106930848 A CN106930848 A CN 106930848A
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- combustion chamber
- air
- fuel quantity
- value
- crank shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/045—Detection of accelerating or decelerating state
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
- F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0404—Throttle position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/602—Pedal position
-
- 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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/045—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions combined with electronic control of other engine functions, e.g. fuel injection
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Propose for fuel injection to be entered internal combustion engine in negative load power（10）Combustion chamber（12）In method.First fuel quantity（mk1）Can be based on calculating crank shaft angle angle value first（KW1）When predicted, the filling of the air of combustion chamber（ml1）It is determined.First fuel quantity（mk1）A part（mk1‑dmk）Sprayed during the induction stroke of related combustion chamber.Second fuel quantity to be sprayed can be based on calculating crank shaft angle angle value second（KW2）When predicted, the filling of the air of combustion chamber（ml2）It is determined.3rd fuel quantity（mk3）Constructed as the difference of second fuel quantity and the part sprayed of first fuel quantity, and the 3rd fuel quantity（mk3）Still in the combustion chamber is injected directly into before lighting the combustion chamber filler.
Description
Technical field
Fuel injection is entered according to claim 1 preamble by internal combustion in negative load power the present invention relates to a kind of
Method in the combustion chamber of machine, and it is related to a kind of being set to implement methods described for preamble according to claim 8
The control device put.
Background technology
Technological accumulation and inheritance of the invention is a kind of internal combustion engine, and the internal combustion engine in the combustion chamber of internal combustion engine using directly to spraying vapour
Oil carrys out work.It is furthermore possible to set a kind of intake manifold injection.A kind of power of internal combustion engine that is such, being driven using gasoline is led to
The power of its air system is crossed to determine.The air system is interpreted as the summation of all of part of internal combustion engine herein, it
Filling on the utilization air of the combustion chamber of internal combustion engine in the operation of internal combustion engine there is influence.Belong to the special of these parts
Refer to：Guide the air inlet pipe of the part of air-such as and control the air throttle of the executing agency of air capacity-such as, and/or
The entrance valve that can changeably control, that is such entrance valve：Their control time and/or open cross-section is can
Changeably control.
" the power（Dynamik）" speed is interpreted as herein, relevant system is wanted using the speed to the system
The change asked is made a response, and the relevant system is as overall internal combustion engine or its air system.For example, to described interior
Combustion engine can propose torque request.Thus the torque request of the internal combustion engine is achieved：Adjusted by the air system with
The torque request is corresponding, the filling of air is utilized for the combustion chamber, suitable to this by the fuel system dispensing
Fuel quantity, and light mixing generating in a combustion chamber, being made up of fuel and air in a suitable time of ignition
Thing.
It is willing to for the driver that the torque request that the internal combustion engine is proposed is produced from for example in the acceleration or deceleration of vehicle
Hope, and/or come from riding stability program and/or transmission control routines and/or rotation speed control program requirement, it
Be in the operation of motor vehicle activation.In order to realize fast reaction of the internal combustion engine to the change of torque request, therefore
Trial is realized being changed for air filling as quickly as possible.
For prepared by the engine condition in heat, optimization mixture, the petrol-injected moment should
In advance（In the intake stroke）.Then, the more time just it is available, until carried out in compression stroke, for institute
The igniting of combustion chamber filler is stated, this prepares favourable for the mixture in the combustion chamber.In order to realize
It is this in advance gasoline injection, must be also to for the calculating moment of the fuel quantity to be sprayed earlier, be exactly
Say and be for example in exhaust stroke, the exhaust stroke is before the induction stroke.In order to default air/
Fuel ratio reliably adjusts out suitable combustion chamber filler, and the air filling can predictably also in exhaust stroke
Just calculated（Prediction（prädiziert））, and then calculate and spray into one kind to this suitable fuel quantity.
When quick air is filled and changed, this prediction is often inadequate.The air filling can for example exist
So rapidly change when gas pedal is rapidly floored so that actual combustion chamber filler is significantly more than first prediction
Air capacity, the actual combustion chamber filler at the end of induction stroke with enter valve closing just no longer change, described
Induction stroke has carried out the proactive calculating for filler after terminating.This effect is also referred to as positive load herein
Power（positive Lastdynamik）.It is air capacity, from default fuel/air mixture-ratio for what is be predicted
It is that suitable fuel injection amount can then cause the excessively dilute mixture not being expected to from the point of view of viewpoint（Air excess）.In positive load
During lotus power, such feasible program is there is：Fuel quantity that may be very little is by additional injection（In rear injection
（Nachspritzer））Corrected, additional being injected in compression stroke is carried out.In this regard, when one later
Recalculate air filling, and a kind of if possible necessary additional fuel quantity is determined based on this.
So far additional injection using, in load power（In rear injection（Nachspritzer））Allow adjustment only
Fuel quantity only in positive load power.But the air filling can change in the opposite direction.The air is filled out
Fill for example so rapidly to change when gas pedal is quickly unclamped so that actual combustion chamber filler is considerably less than
The air capacity formerly predicted in the entrance valve still opened（The actual filler with the entrance valve closing just not
Change again）, this load power also referred to as negative herein.In negative load power, the air filling of too high prediction can cause
Too high fuel quantity, and the thus mixture of the temporary transient overrich not being expected to, this can increase the exhaust emissions of internal combustion engine and carry
Height consumption.
The content of the invention
Task of the invention is, there is provided a kind of method of the type mentioned in literary head, can be avoided using the method or
Person is at least reducing disadvantages mentioned above.
The feature that this task has been utilized respectively independent claims is solved.
In the present invention, if a kind of negative load power（Air filling is reduced）If being identified（For example pass through
Air filling rated value, high negative gradient）, then the air filling that emitted dose is based on the prediction is able to be calculated,
And then reduced with the amplitude of a value for determination.From the injection of this fuel quantity, draw first excessively dilute in theory
Combustion chamber filler.When later, but still before excessively dilute combustion chamber filler is lighted, the air
Filling can re-start calculating.Current new calculating is due to shorter prediction-time interval（Prediction level（Prä
diktionshorizont））So more accurate.The fuel quantity being actually needed is determined based on this, and the need
The residual quantity of fuel quantity wanting, for being injected is injected into the combustion chamber using additional being injected in compression stroke
In.Whereby, even if also ensure that one kind in a combustion chamber carries default air/fuel-ratio in negative load power
The mixture of example.
A kind of to be preferred embodiment characterised by, the additional fuel quantity is sprayed in compression stroke.
It is also preferred that the first calculating crank shaft angle angle value is located in exhaust stroke.
Moreover it is preferred that described second calculates crank shaft angle angle value positioned at the and then induction stroke of the exhaust stroke
End.
If it is also preferred that the change speed of the rated value of the pace of change or air filling of the air filling ml of prediction
Spend or affect the pace of change of the adjusting position of the executing agency of air filling（The change of the opening angle of such as air throttle
Speed）It is the numerical value of negative and described pace of change more than if a default threshold value, then a kind of negative load power
Will be identified.
Another preferred embodiment is characterised by that the threshold value of the pace of change is defined whereby：The sky of prediction
The change of the rated value of change or the air filling of the value of gas filling ml affects the execution that the air is filled
The change of the adjusting position of mechanism（The change of the opening angle of such as air throttle）Crank shaft angle angle value and institute are calculated described first
State and reach the 20% of described value between the second calculating crank shaft angle angle value, the value refers in the described first calculating crankshaft angles
（besessen）The regulation of executing agency that is that the air filling ml or air of the prediction are filled or affecting air filling
The rated value of the opening angle of the rated value of position, such as air throttle.Method according to any one of the claims,
Characterized in that, so determining the fuel quantity so that produce a kind of default combustion using the air filling of affiliated prediction
Material/air-ratio.
For the implementation method of control device preferably, it sets to this, particularly this is programmed：Control
The process of the method for at least one implementation method of the implementation method according to methods described.
Other advantages are produced by dependent claims, specification and drawings.
It is appreciated that：Foregoing and still to be illustrated below feature can not only be in the combination for being given respectively
In and can in other combinations or individually in the case of use, without leaving framework of the invention.
Brief description of the drawings
Embodiments of the invention are shown in the drawings, and are further elucidated with the following description.Here, in difference
Same reference numerals in accompanying drawing mark respectively identical or its according at least to the element that can compare function.Accompanying drawing is showing
The form of meaning property is respectively illustrated：
Fig. 1：It is a kind of as the technology of the present invention environment, the internal combustion engine with sensor and executing agency；
Fig. 2：The air of combustion chamber fills the change procedure of ml, together with being sprayed into positive load power and light the combustion chamber
The opportunity of filler；
Fig. 3：The air of combustion chamber fills the change procedure of ml, together with being sprayed into simultaneously in negative load power in the prior art
Light the opportunity of the combustion chamber filler；
Fig. 4：The air of combustion chamber fills the change procedure of ml, together with penetrating and point in negative load power in the present invention
Fire the opportunity of the combustion chamber filler；
Fig. 5：As the flow chart of the embodiment of the method according to the invention.
Specific embodiment
Fig. 1 illustrate in detail the internal combustion engine 10 with combuster 12, and the combustion chamber is movingly carried out close by piston 14
Envelope.The internal combustion engine 10 lights a fire and is directly injected into the combustion chamber gasoline to be operated using external source.If institute
Stating internal combustion engine additionally has at least one to the injection valve sprayed in the air inlet pipe, then additionally just can
Gasoline is injected into the air inlet pipe 16 before the entrance valve of valve 18 or the combustion chamber is entered.Enter by described at least one
Enter valve 18, the combustion chamber 12 can be by air or Fuel-air-mixture filling.This combustion chamber filler can by
The dispensing fuel of direct injection valve 20 sprayed in the combustion chamber.The generation, the combustion with fuel/air mixture
Room filler is burnt to be lighted a fire using igniter 22.Burned residual gas is arranged by least one dump valve 24
Go out.
The value of the combustion chamber filler with air or the hollow qi leel volume of the combustion chamber filler value by
Control device 26 is determined, in this regard, the signal L and/or suction press sensing of control device treatment mass air flow sensor 28
Device 30 and crankshaft angle sensor 32 signal ps.The control device 26 is from the signal of the crankshaft angle sensor
The rotating speed of the internal combustion engine is determined.The torque that accelerator pedal sensor 34 obtains driver is expected.From the sensor
And/or in the signal of other sensors, the control device forms the regulated quantity for manipulating executing agency, the execution machine
Structure is used to control the internal combustion engine.In the case of showing, throttle execution mechanism 36, the direct injection valve 20 and described
Igniter 22 belongs to the executing agency；The air flowed into the internal combustion engine is adjusted using the throttle execution mechanism
Section；Direct injection valve carries out dosage described in fuel utilization in the combustion chamber 12；Combustion chamber filler utilizes the igniting
Device is lighted.Above-mentioned sensor and executing agency are enumerated for sensor and the final of executing agency.It is described enter
Enter valve and the dump valve for example to be opened and closed using the operating mechanism synchronous with piston movement.
Fig. 2 illustrate in detail cylinder in other words the combustion chamber 12 of internal combustion engine 10 air filling ml, for four punchings
The change procedure 40 on crankshaft angles KW for a part in the working cycles of journey internal combustion engine, 42 are sprayed together with gasoline,
44 enter the opportunity of the combustion chamber 12 and light the opportunity of combustion chamber filler described in 46.Working cycles are understood in this application
It is four successive sequences stroke, being repeated cyclically of four-stroke engine, and is for example especially also following sequences：
Exhaust stroke, induction stroke, compression stroke, expansion stroke.
The value ml of following combustion chamber fillers is distributed to crank shaft angle angle value KW by the change procedure 40 respectively：The burning
The value of room filler is produced in the last entrance valve 18 of the combustion chamber 12 involved by closing under the premise of following：Determine and fill out
The parameter for filling thing will not change between the crank shaft angle angle value KW and crank shaft angle angle value ES, the phase in the crank shaft angle angle value ES
The last entrance valve 18 of the combustion chamber of pass is closed.In other words, if it is determined that the condition of property does not change thitherto
If, then the curve 40 just imparts filler to each crank shaft angle angle value, and the filler is in the related burning
Produced when the last entrance valve of the combustion chamber is closed in room.The reality when the last entrance valve of combustion chamber is closed
The next also referred to as actual filler of the filler of generation.
Except value ml（ES）In addition（The value is produced for the crankshaft angles ES of the close moment of the entrance valve of related cylinder
It is raw）, the value of the actual filler is only theoretical value.
The premise of constant parameter is in the operation of the stabilization of internal combustion engine using almost constant accelerator pedal position and near
Constant rotating speed is met well.But it is no longer able in unstable running status so that " this premise is to meet
" it is starting point.When gas pedal is rapidly floored, the suction press before the entrance valve can be such
Rapidly raise so that the value of the actual filler is in one length of stroke of the internal combustion engine, namely about
Consumingly improved on 180 ° of angular ranges of crankshaft angles, the actual filler enters in closing the last of combustion chamber
Produced when entering valve.
During this has been reflected in the raising of curve 40 for being drawn as dotted line in fig. 2, described Fig. 2 is directed to positive
The situation of load power.
Illustrated next for known method meeting reference picture 2 for positive load power.
When first calculates crank shaft angle angle value KW1, the air filling ml based on the prediction calculates the first fuel quantity, the sky
Gas filling is presented by the change procedure 40.Here, or can obtain and be carried out continuously ground in the control device 26
The air filling newly predicted, or predicted exclusively for this first calculating crank shaft angle angle value KW1, that is calculate described
Air fills the value of ml1.
Corresponding computational methods are known, and based on suction press that is for example measured or being modeled,
Or boost pressure, and/or the signal based on mass air flow sensor 28 are based in the case of the engine of supercharging（The air mass flow
Meter obtains the air capacity in being flowed into the internal combustion engine in per time unit or crankshaft angles unit）, and/or based on air
Measure the position of executing agency 36（The actuating mechanism controls are flowed into the fresh air in the internal combustion engine）, such as air throttle position
Put and/or the combustion chamber entrance valve and/or dump valve variable control device executing agency position, wherein, lead to
Cross and note the quantity of the combustion chamber and the rotating speed of internal combustion engine and calculate the value of single combustion air filling.
From such prediction, combustion chamber filler air capacity, noticing for combustion chamber filler
In the case of the rated value of fuel/air mixture ratio, suitable fuel quantity can be computed.For the combustion of such as stoichiometry
For material/air-ratio, air capacity is 14.7 times of fuel quantity.
This fuel quantity can be injected into the combustion chamber using the injection equipment 42 in the intake stroke, so that
More time is available for being uniformly distributed of the fuel in the combustion chamber 12 when igniting.
When second calculates crank shaft angle angle value KW2, the air based on newer prediction fills the combustion to be sprayed to second
Doses is calculated, and the air filler is given by the change procedure 40.In this case, herein also or meeting
The air filling that acquisition newly is predicted with being carried out continuously in the control device, or exclusively for this second calculating bent axle
The value ml2 of angle value KW2 prediction air fillings.Described second fuel quantity to be sprayed so determines, so that the fuel quantity
Generally speaking calculated using the first fuel quantity to be sprayed and for second it is that crank shaft angle angle value is predicted, in positive load power
More air fill to generate desired fuel/air mixture-ratio.This fuel quantity is utilized in compression stroke and once added
Injection 44 sprayed.It is described to fill ml from actual air using first time injection and the second injection sum（ES）Middle product
Raw demand for fuel ratio is preferably satisfied individually with first time injection.Accuracy higher results from this：In moment/bent axle
Angle KW2 fills ml2 due at the small interval of moment/crankshaft angles ES for the air that moment/crankshaft angles ES is predicted
Just more accurately meet actual air than air identified in larger space filling ml1 and fill ml（ES）.
The additional injection 44 used according to Fig. 2 only allows to adjust fuel altogether to be sprayed in positive load power
Amount.The air of the prediction is filled but can be also changed in the opposite direction.The air filling can for example exist
So rapidly change when rapidly unclamping gas pedal so that the actual combustion chamber filler is significantly less than and is entering valve
The air capacity still predicted first in exhaust stroke before when still opening, the combustion chamber filler enters with described in closing
Enter valve 18 just no longer to change.It is such to reduce next also referred to as negative load power（negative Lastdynamik）.
Illustrated referring next to Fig. 3 it is a kind of with negative load power in the case of known method.
When first calculates crank shaft angle angle value KW1, calculate a kind of first based on the air filling being predicted and fire
Doses, air filling is given by the change procedure 40.The calculating is so carried out, as said in association with Fig. 2
As bright.Therefore in the result, from combustion chamber filler, prediction air capacity ml, noticing for combustion chamber
In the case of the rated value of the fuel/air mixture ratio of filler, suitable fuel quantity is computed.This fuel quantity is in air inlet
It is injected into the combustion chamber using injection equipment 48 in stroke, so that more time when igniting is for causing
Fuel in combustion chamber is available for being able to be uniformly distributed.
In the case of shown, the air predicted when have passed through the first calculating crank shaft angle angle value KW1 fills ml
It is greater than actual air filling ml produced when last entrance valve 18 is carried out closing ES later（ES）.Because former
Fuel quantity to be injected into the intake stroke is carried out using the target of the adjustment of the fuel/air mixture-ratio for being expected to
Calculate, so the feeding-up mixture with above-mentioned unfavorable consequence is generated, for tail-gas quality.
For the embodiments of the invention in the case of with negative load power, Fig. 4 show cylinder or
The combustion chamber 12 of person's internal combustion engine 10 air filling, for a part for the working cycles of four-stroke engine 10
Change procedure 40 in crankshaft angles, together with the opportunity for gasoline being injected into combustion chamber described in 50,52.
The value of following combustion chamber fillers is distributed to crank shaft angle angle value by curve 40 respectively：The value of the combustion chamber filler
Produced under the premise of following when the last entrance valve 18 of related combustion chamber 12 is closed：Determine that the parameter of the filler exists
The crank shaft angle angle value and crank shaft angle angle value ES（The last entrance valve of related combustion chamber 12 is carried out in the crank shaft angle angle value
Close）Between will not change.In other words, if it is determined that the condition of property thitherto all immovable words, then the curve
40 give filler for each crank shaft angle angle value, and the filler is closing the burning in the relevant combustion chamber
Produced during the last entrance valve of room.When the last entrance valve of combustion chamber is closed, next the actual filling for producing also is claimed
It is actual filling.
The crankshaft angles ES of the close moment except the described value-value for the entrance valve 18 of relevant cylinder and produce
Raw-in addition, the value of the actual filling is only theoretical value.
The premise of constant parameter is in the operation of the stabilization of internal combustion engine using almost constant accelerator pedal position and near
Constant rotating speed is met well.But in unstable running status, it is no longer able to so that " this premise is to meet
" it is starting point.When gas pedal is rapidly unclamped, can be so fast the suction press ps before valve 18 is entered
Reduce fastly so that the value of the actual filler is in a length for stroke of the internal combustion engine, namely about
Consumingly reduce on 180 ° of angular ranges of crankshaft angles, the actual filler is produced is closing the combustion chamber 12 most
During rear entrance valve 18.
This has been reflected in the change procedure of the decline for being drawn as the curve 40 of dotted line in fig. 4, and Fig. 4 is directed to negative
The situation of load power.
Referring next to figure 4 illustrates change procedure 40 and the value that is given there, and reference picture 5 flow chart
Embodiment to the method according to the invention is illustrated, and is completed just as by control device 26（abarbeiten）As.
Single square in a flow chart in figure 5 correspond to program module or independent step according to relation herein, the program mould
The step of block can be divided into other again in itself.Step S2 is reached from square S1, the square S1 is represented for controlling
The program of the higher level of the internal combustion engine is made, in step s 2 when first calculates crank shaft angle angle value KW1, based on the air predicted
Fill ml to calculate the first fuel quantity mk1, the air is filled ml and is presented in fig. 4 by change procedure 40.Herein or
It is that can obtain the air filling newly predicted with being carried out continuously in the control device 26, or exclusively for this first meter
Calculate crank shaft angle angle value KW1 and predict the air filling ml（KW1）Value.
Additionally, as being described above, corresponding computational methods are known, and based on for example tested
Suction press ps that is amount or being modeled, or boost pressure, and/or base are based in the case of the engine of supercharging
In the signal L of mass air flow sensor（The mass air flow sensor is obtained and flows into the internal combustion in per time unit or crankshaft angles unit
Air mass flow in machine）, and/or the position based on air capacity executing agency（The actuating mechanism controls are flowed into the internal combustion engine
In fresh air）The position of-such as air throttle and/or the variable control of the entrance valve of the internal combustion engine and/or dump valve
Executing agency position, wherein, by noticing the quantity of the combustion chamber and the rotating speed of internal combustion engine, single combustion chamber is used
The value of air filling can be computed.
From such prediction, combustion chamber filler air capacity, noticing for combustion chamber filler
In the case of the rated value of fuel/air mixture ratio, suitable fuel quantity can be computed.For the combustion of such as stoichiometry
For material/air-ratio, air capacity is 14.7 times of fuel quantity.But the present invention also can with for the fuel/air mixture-
Used in the combination of other rated values for ratio.
In step s3, the scope nLD of the negative load power for if possible occurring can be obtained.In this regard, example
Air as predicted is filled the pace of change of the rated value of pace of change or the air filling of ml or affects institute
The pace of change for stating the opening angle of the pace of change-such as air throttle of the adjusting position of the executing agency of air filling is asked
Go out.These parameters are present in control device 26, or by the control device from the signal present in control device
And try to achieve.
Can be examined in step s 4：Whether the load power tried to achieve is negative, and whether the negative load is moved
The scope of power has exceeded default threshold value SW.If the situation, then described program is returned in the square 1
In in the main program that carries out.
If there is negative load power in contrast, the negative load power is numerically more than the threshold
Value, then described program is just branched off into step S5.In the step S5, from the fuel quantity mk1 for determining in step s 2
Default value dmk is subtracted first.The value dmk to be subtracted is preferably a kind of fixed value.At another preferred embodiment
In, the preset value dmk is a kind of value of the scope nLd for depending on negative load power：The scope of the negative load power
NLd is bigger, then the value dmk to be subtracted is preferably bigger.
The scope of the negative load power is, for example, that the pace of change filled with the air continuously predicted is characterized.
Then in step s 6, the fuel quantity mk1-dmk for reducing the preset value dmk is injected in the intake stroke,
So that more time is available for being uniformly distributed in the combustion chamber for fuel when igniting.This hair
In the Fig. 4 with injection equipment 50, the injection equipment 50 is shown as rectangle and is shown in Figure 4 for the rectangle of black for life.
The rectangle of this black represents the fuel quantity mk1-dmk being injected, and be shown in broken lines partially illustrate the quilt
The part dmk for subtracting.
In the step s 7, in the second calculating crank shaft angle angle value KW2, the air filling based on the prediction for updating calculates the
Two fuel quantity mk2, the air filling of the prediction of the renewal is given by change procedure 40.In this case, herein or
Also the air filling ml2 continuously predicted newly in the control device can be obtained, or it is bent exclusively for this second calculating
Shaft angle angle value predicts the value of the air filling.Due to short time interval（The time interval can also be equal to zero）, closing
During moment/crankshaft angles the ES of the last entrance valve of relevant combustion chamber, air that this is predicted newly filling ml2 ratios are the
The air filling predicted during one calculating crank shaft angle angle value KW1 is more accurate.In negative load power, the current position newly is predicted
Air filling ml2 be particularly less than predicted when the first calculating crank shaft angle angle value KW1 is carried out air filling ml1.
The second fuel quantity mk2 is so determined so that the fuel quantity calculates crank shaft angle angle value for second with described
The air filling ml2 that KW2 is predicted jointly produces the fuel/air mixture-ratio being expected to.
A part of this fuel quantity mk2 is as the fuel quantity being reduced for having subtracted the default value dmk
Mk1-dmk is injected in the intake stroke.
In step s 8, the part mk3 for still lacking is formed by simple difference（Differenzbildung）Carry out
Calculate, and sprayed in compression stroke, wherein, the injection is preferably carried out at the beginning of compression stroke.It is described still
To be sprayed, part mk3 that is lacking calculating is for example carried out by following equations：
mk3=mk2-（mk1-dmk）.
In extreme circumstances, it is described additionally second have fuel quantity mk3 to be sprayed also can be equal to zero.It is described according to figure
3 use, the distribution of injection even if the to be sprayed of the total every combustion chamber filler of adjustment is also allowed in negative load power
Fuel quantity.
Claims (9)
1. it is used to that fuel injection is entered internal combustion engine in negative load power（10）Combustion chamber（12）In method, in the method
In, in the current working cycles of internal combustion engine, the first fuel quantity（mk1）Based in the first calculating crank shaft angle angle value（KW1）When
Air filling predicted for current working cycles, combustion chamber（ml1）To be determined, it is characterised in that described
One fuel quantity（mk1）A part（mk1-dmk）Sprayed during the induction stroke of related combustion chamber；Second is to be sprayed
Fuel quantity be based on second calculate crank shaft angle angle value（KW2）When predicted for current working cycles, the sky of combustion chamber
Gas is filled（ml2）It is determined, wherein, described second calculates crank shaft angle angle value（KW2）Described first is located in a duty cycle
Calculate crank shaft angle angle value（KW1）Afterwards；3rd fuel quantity（mk3）As second fuel quantity and first fuel quantity
The difference of the part of injection is constituted；And the 3rd fuel quantity（mk3）Can also before the combustion chamber filler is lighted
It is injected directly into current working cycles in the combustion chamber.
2. the method as described in claim 1, it is characterised in that the 3rd fuel quantity（mk3）Sprayed in compression stroke
Penetrate.
3. the method as described in claim 1, it is characterised in that described first calculates crank shaft angle angle value（KW1）Rushed positioned at exhaust
Cheng Zhong.
4. the method as described in claim 3, it is characterised in that described second calculates crank shaft angle angle value（KW2）Positioned at and then institute
State the end of the induction stroke of exhaust stroke.
5. the method as any one of the claims, it is characterised in that if the air of prediction fills the change of ml
The pace of change of the rated value that speed or air are filled affects the executing agency that air is filled（36）Adjusting position
Pace of change, the pace of change of the opening angle of such as air throttle be negative and described pace of change numerical value be more than one
If default threshold value, a kind of negative load power will be identified.
6. the method as described in claim 5, it is characterised in that the threshold value of the pace of change is defined whereby：Prediction
Air filling ml value change or air filling rated value change or affect air filling
The change of the adjusting position of executing agency, the change of the opening angle of such as air throttle, crank shaft angle angle value is calculated described first
（KW1）Crank shaft angle angle value is calculated with described second（KW2）Between for described value 20%, described first calculate crankshaft angles
（KW1）Described in predict air filling（ml）Or affiliated fuel quantity（mk）Air filling or affect air filling
Executing agency（36）The rated value of adjusting position, the rated value of the opening angle of such as air throttle possess the value.
7. the method as any one of the claims, it is characterised in that so determine the fuel quantity（mk）So that
Filled using affiliated, prediction air（ml）To produce a kind of default fuel/air mixture-ratio.
8. internal combustion engine is used for（10）Control device（26）, the control device sets to this：Controlled in negative load power
The combustion chamber for fuel injection being entered internal combustion engine（12）In method process, in the method, in the current of internal combustion engine
In working cycles, the first fuel quantity（mk1）Based in the first calculating crank shaft angle angle value（KW1）In for current working cycles institute
Prediction, combustion chamber air fills to be determined, it is characterised in that the control device（26）This is set：In phase
During the induction stroke of the combustion chamber of pass, to first fuel quantity（mk1）A part（mk1-dmk）Injection controlled
System, and the second fuel quantity to be sprayed（mk2）Based on second calculate crank shaft angle angle value when for current working cycles institute
Prediction, combustion chamber air fills to be determined, wherein the second calculating crank shaft angle angle value is located in a duty cycle
It is described first calculate crank shaft angle angle value after, and the 3rd fuel quantity as second fuel quantity and first fuel quantity
The difference of the part through spraying is constructed, and the 3rd fuel quantity can also before the combustion chamber filler is lighted, working as
Directly it is injected into the combustion chamber in preceding working cycles.
9. control device according to claim 8（26）, it is characterised in that it sets to this：Particularly this is programmed：
Control the process of the method according to any one of claim 2 to 7.
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|---|---|---|---|
| DE102015220397.2 | 2015-10-20 | ||
| DE102015220397.2A DE102015220397A1 (en) | 2015-10-20 | 2015-10-20 | Method for injecting fuel into a combustion chamber of an internal combustion engine with negative load dynamics |
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| CN106930848A true CN106930848A (en) | 2017-07-07 |
| CN106930848B CN106930848B (en) | 2021-07-09 |
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| EP1582719A1 (en) * | 2004-04-02 | 2005-10-05 | Delphi Technologies, Inc. | Diesel engine control system |
| JP2006316757A (en) * | 2005-05-16 | 2006-11-24 | Isuzu Motors Ltd | Exhaust emission control method and exhaust emission control system |
| JP2009174450A (en) * | 2008-01-25 | 2009-08-06 | Toyota Motor Corp | Fuel injection control device for internal combustion engine |
| CN102791998A (en) * | 2010-03-31 | 2012-11-21 | 马自达汽车株式会社 | Control system for gasoline engine |
| CN104066961A (en) * | 2012-01-26 | 2014-09-24 | 丰田自动车株式会社 | Internal combustion engine control device |
| CN104421019A (en) * | 2013-08-23 | 2015-03-18 | 福特环球技术公司 | Method and system for knock control |
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2015
- 2015-10-20 DE DE102015220397.2A patent/DE102015220397A1/en active Pending
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2016
- 2016-10-20 CN CN201610914069.4A patent/CN106930848B/en active Active
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|---|---|---|---|---|
| EP1582719A1 (en) * | 2004-04-02 | 2005-10-05 | Delphi Technologies, Inc. | Diesel engine control system |
| JP2006316757A (en) * | 2005-05-16 | 2006-11-24 | Isuzu Motors Ltd | Exhaust emission control method and exhaust emission control system |
| CN101175910A (en) * | 2005-05-16 | 2008-05-07 | 五十铃自动车株式会社 | Exhaust gas purification method and exhaust gas purification system |
| JP2009174450A (en) * | 2008-01-25 | 2009-08-06 | Toyota Motor Corp | Fuel injection control device for internal combustion engine |
| CN102791998A (en) * | 2010-03-31 | 2012-11-21 | 马自达汽车株式会社 | Control system for gasoline engine |
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| Publication number | Publication date |
|---|---|
| CN106930848B (en) | 2021-07-09 |
| DE102015220397A1 (en) | 2017-04-20 |
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