CN101253318A - Method for operation of an internal combustion engine - Google Patents
Method for operation of an internal combustion engine Download PDFInfo
- Publication number
- CN101253318A CN101253318A CNA2006800243204A CN200680024320A CN101253318A CN 101253318 A CN101253318 A CN 101253318A CN A2006800243204 A CNA2006800243204 A CN A2006800243204A CN 200680024320 A CN200680024320 A CN 200680024320A CN 101253318 A CN101253318 A CN 101253318A
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- China
- Prior art keywords
- fuel quantity
- fuel
- wall film
- combustion engine
- coefficient
- Prior art date
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Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 38
- 239000000446 fuel Substances 0.000 claims abstract description 90
- 238000010304 firing Methods 0.000 claims description 27
- 238000004590 computer program Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000007921 spray Substances 0.000 description 8
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/047—Taking into account fuel evaporation or wall wetting
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- 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)
Abstract
During operation of an internal combustion engine (10) the fuel from at least one injector (20) reaches an inlet duct (16). The effect of a fuel wall film (32) in the inlet duct (16) on the amount of fuel reaching the combustion chamber (12) is accounted for. According to the invention, a first amount of fuel is modelled that reaches the wall film (32) from the injector (20).
Description
Technical field
The present invention relates to a kind of method of the operation of combustion engine as described in the preamble according to claim 1.Object of the present invention also is the control and/or the regulating device of corresponding computer programs, electric storage medium and internal-combustion engine.
The front begins described method and is disclosed among the DE10241061A1.The basis of this thought is, in order to obtain clean promptly discharging few and burning consumption the best, therefore in having the internal-combustion engine of intake manifold injection, correct burning capacity joined the air that is arranged in the firing chamber.But when the upstream end of intake valve was ejected into fuel in the suction tude, the part in the fuel that is sprayed still was bonded on the wall of suction tude.It clearly illustrates that, in fact, only is that the part in the fuel that is sprayed into enters into the firing chamber.Make a part from the side the air flowing stream fuel on being bonded at the air inlet tube wall by or in this air stream, evaporate.Although it clearly, earlier is injected in the suction tude for the moment, fuel arrives in the firing chamber again.
Up to use such method till today when determining the fuel quantity that is sprayed, promptly this method is considered the formation and the decomposition of wall film.This present known method quasi-steady ground carries out work.It clearly illustrates that from following, promptly in starting or start again spray after by method as start, after start and restart enriching and form the wall film.The change of loading is only considered in the change of wall film.
The objective of the invention is to improve the described the sort of method of beginning, thereby make the internal-combustion engine that moves by this method have better discharging and oil consumption performance.
This purpose realizes by the method with the described feature of claim 1.In addition, it is also by realizing according to the control and/or the regulating device of the described corresponding computer program of claim arranged side by side, electric storage medium and internal-combustion engine.Favourable scheme record of the present invention in the dependent claims.
The invention advantage
By method of the present invention, also can very well eliminate unsettled and instantaneous process.At first, directly at this moment form on the operation phase of the internal-combustion engine after cold starting in wall film and the actual arrival of the sub-fraction firing chamber in perhaps having only the fuel that is ejected into from sparger the suction tude, can form the model of the fuel quantity in the actual arrival firing chamber by method of the present invention with extraordinary validity.This also makes the fuel quantity that is sprayed accurately adapt to the practical working situation of internal-combustion engine.Can avoid mixed gas rich excessively in the firing chamber thus, this has reduced fuel consumption and discharge of poisonous waste again.
Therefore, if form the model that from the wall film, for example arrives second fuel quantity in the firing chamber, can improve the validity of the model that arrives the fuel quantity in the firing chamber so again by evaporation.
With a kind of simple method but accurately can determine to arrive the fuel quantity of wall film and the fuel quantity that from this wall film, is evaporated by making the fuel quantity that is sprayed from sparger multiply by corresponding coefficient.Therefore these coefficients are preferably the on-fixed value, are variable.The most important parameters that influences described coefficient is: the position of the temperature of the pressure of suction tude, wall film, the temperature of wall film, intake temperature, fuel temperature, fuel type (winter fuel or summer fuel), flow velocity (under a stable condition, depending on the rotating speed of I. C. engine crankshaft), charge movement valve, the position of camshaft and exhaust gas recirculation and the exhaust gas temperature when overlapping than the big cam axle.Can realize this dependence with the form of characteristic curve and characterisitic family.
By arriving amount balance or mass balance in the wall film and the fuel that evaporation is left from this wall film, from starting value, can be easily and accurately determine the actual fuel that is had in the wall film.Above-mentioned advantage in the time of can in this way realizing the internal-combustion engine unstable operation easily.Starting value during engine starting usually is 0, because after internal-combustion engine stops, the wall film of existence is evaporated in the suction tude very fast owing to the transmission of heat of motor.
In having the internal-combustion engine of many cylinders, preferably come implementation modelization for each cylinder independently.Therefore should consider, in respective cylinder, when injected, can realize that at first fuel evaporates from the wall film.In addition, in this mode, consider that also cylinder closes.By separate modelsization, also can further improve the degree of accuracy of the method that is proposed.
If considering such fact is that fuel comprises different volatile ingredient (this causes second kind of performance), can further improve degree of accuracy so.
When measuring the fuel that is sprayed, can consider to form the result of model in a different manner.But, if modelling make arrive in the firing chamber and considered that modeled fuel quantity is corresponding with the ideal fuels amount, be most convenient.It has such advantage, i.e. Yi Qian control and adjustment principle can remain unchanged in addition.
Description of drawings
Below, describe the special preferred embodiment of the present invention in detail about accompanying drawing.In the accompanying drawings:
Fig. 1 is the schematic representation of internal-combustion engine;
Fig. 2 is first embodiment's the function view of method of the internal-combustion engine of service chart 1; And
Fig. 3 and Fig. 2 are similar, second embodiment's function view.
Embodiment
Whole internal-combustion engine is with reference character 10 expressions in Fig. 1.This internal-combustion engine comprises a plurality of cylinders, still only shows in these cylinders in Fig. 1.This cylinder comprises firing chamber 12, and this firing chamber 12 can link to each other with suction tude 16 by intake valve 14.Regulate by throttle valve 18 by the air quantity that suction tude 16 arrives in the firing chamber 12.Arrange a sparger 20 between throttle valve and intake valve 14, this sparger 20 is ejected into fuel 22 in the flow air in suction tude 16 (arrow 23).The fuel-air mixture that joins in the firing chamber 12 is lighted a fire by spark plug 24.The gas of combustion of heat is discharged from the firing chamber by exhaust valve 26 and outlet pipe 28.
As from can being clear that Fig. 1, when fuel 22 was injected in the suction tude 16 of intake valve 14 fronts, the part in the fuel 22 that sprays into sticked on the wall 30 of suction tude 16 as wall film 32.But in order accurately to be adjusted in fuel quantity or the quality that arrives during the intake stroke in the firing chamber 12, therefore operate (in this attention according to the functional method that illustrates in Fig. 2, below, term or parameter " amount " also can replace by term or parameter " quality ").
The input end parameter of method shown in Figure 2 is: theoretical fuel quantity rksol, and this theory fuel quantity should arrive in the firing chamber 12 when the intake stroke of research; Coefficient fwfe, the part of the arrival wall film 32 of the fuel that sprays into is represented by this coefficient; And coefficient fwfa, represent by this coefficient by the fuel quantity that wall film 32 is evaporated.The parameter of output end of method shown in Figure 2 be modeled, arrive the fuel quantity rkbr in the firing chamber 12.Method shown in Figure 2 is designed, and makes the modelling fuel quantity rkbr that arrives in the firing chamber 12 identical with ideal fuels amount rksol.
In 34, deduct coefficient fwfe from 1, and therefore form coefficient frkbr.What represent the fuel that sprays into by it is not to arrive wall film 32, but flow into the part in the firing chamber 12.In 36, theoretical fuel quantity rksol is divided by coefficient frkbr, and this can obtain total amount of fuel injected rkev '.Represent with numeral: the value of 0.8 coefficient fwfe shows that 80% the fuel 22 that is ejected in the suction tude 16 by sparger 20 is bonded on the wall film 32.It shows that with reverse inference with respect to the requirement of Actual combustion chamber, it must spray five times fuel quantity by sparger 20, and therefore desirable fuel quantity arrives in the firing chamber 12.
In adder 38, as further will forming below, formed actual " being captured " fuel quantity rkwf on wall film 32.It multiply by coefficient fwfa in 40, this can obtain from wall film 32 evaporation and arrive fuel quantity rkbrwf the firing chamber 12.Divided by coefficient frkbr, this can obtain arriving the value rkbrwf ' of the fuel quantity in the firing chamber 12 in 42 for it.It is deducted from the total fuel quantity rkev ' that sprays in 44 again, and in fact this obtained being injected to fuel quantity rkev in the suction tude 16 by sparger 20.
In fact the fuel quantity rkev that is sprayed into by sparger 20 multiply by coefficient fwfe in 46, and this can obtain arriving from sparger 20 the fuel quantity rkwfe of wall film 32.The product of actual fuel quantity rkev that sprays into and frhbr has produced the part rkbrev that sprays into fuel quantity in the direct arrival firing chamber 12 in 47.In 47 formed summation can obtain modeled, arrive the total fuel quantity rkbr in the firing chamber 22.Obtain aequum by asking poor with the first fuel quantity rkwfe and the second fuel quantity rkbrwf determined in 40, that evaporated from wall film 32 that arrive in the wall film 32 in 48, this aequum has produced the variable quantity drkwf of the fuel quantity rkwf that is trapped on the wall film 32.It is fed in the above-mentioned adder 38, and this has produced the fuel quantity rkwf that is captured on the wall film 32 after actual intake stroke.Adder 38 for example can have value 0 value to start with when internal combustion engine start, because can realize thus, be present in fuel 22 evaporations on the wall film when internal-combustion engine stops, and therefore when internal-combustion engine 10 carries out repeated priming, has not had the wall film.It at first forms by the injection of the sparger 20 when internal-combustion engine 10 starts.
Method shown in Figure 2 during each working stroke of internal-combustion engine 10, under the situation of received constant coefficients fwfe and fwfa, produced one that strengthen at first consumingly, but progressively near value rkwf limiting value, that be trapped in the fuel in the wall film 32.In this mode, the unstable performance of wall film 32 has been described well.When stable operation, value rkwf is constant, and promptly the fuel quantity rkwfe that is brought in the wall film 32 by sparger 20 is the same big with the fuel quantity rkbrwf that is evaporated from wall film 32.
The wall film enters and leaves these two physical effects with the wall film and just compensate, and can accurately carry out mixed gas when making from engine starting and control in advance.Therefore, this happens, and promptly in starting, the λ deviation has reduced when restarting the critical stage with heat run, and discharging has descended.So far needed enriching coefficient can be cancelled when these stages, and this makes fuel consumption descend.
The wall film entered leave the coefficient fwfe and the fwfa that play a decisive role with the wall film and generally do not have fixed value in practice, and depend on the running parameter of internal-combustion engine 10.This dependence realizes in control and controlling device 50 as characteristic curve and characterisitic family, the work of this device control or adjusting internal-combustion engine 10.Therefore, computer program is stored in the storage in control and controlling device 50, realizes method shown in Figure 2 by this computer program.
The pressure in the suction tude 16 for example, fuel temperature in the wall film 32, the temperature of flow air in suction tude 16, the temperature of the fuel 22 that sparger 20 is sprayed, the kind of fuel 22, carry out the speed (it at first depends on the rotating speed of the bent axle of internal-combustion engine 10 on the other hand) of flow air in suction tude 16, the position of the charge movement valve that in Fig. 1, does not illustrate (this charge movement valve can be arranged in the suction tude 16), the position of the camshaft that in Fig. 1, does not also illustrate and/or exhaust gas temperature (when it is returned in the suction tude 16 in the scope of exhaust gas recirculation) but belong to the running parameter of influence coefficient fwfe and fwfa.
The distortion of the method for the internal-combustion engine 10 of service chart 1 is illustrated among Fig. 3.Therefore be suitable for, have and have identical reference character with these zones of the regional suitable function of Fig. 2 and no longer describe in detail.
Consider to be not easy to evaporate by difference or not the coefficient of volatile part evaporated easily or the part of volatile fuel 22 arrives amount in the wall film 32 in when correspondingly leaving the amount of leaving of this wall film 32, can make the model of the storge quality of wall film 32 more accurately.The performance of second kind of layout forms model by wall film 32 being divided into two different " virtual " wall films with respective attributes.Therefore, preestablish different coefficient fwfe1 and fwfa1 for being captured in amount rkwf1 in the wall film 32, volatile fuel meat, and for be captured in the wall film 32, the amount rkwf2 of volatile fuel meat does not preestablish coefficient fwfe2 and fwfa2.
Two coefficient fwfe1 and fwfe2 when the fuel quantity rkev that determines to be sprayed multiply each other in 52 for this consideration.The compensation rate of wall film output quantity rkbrwf makes emitted dose rkew reduce a part rkbwf1 formed in 54, that evaporated respectively and the total amount of rkbrwf2 from wall film 32.
Claims (13)
1. the method for an operation of combustion engine (10), in the method, fuel is ejected in the suction tude (16) by at least one sparger (20), and take into account that the interior fuel-wall film (32) of tracheae (16) is to arriving the influence of the burning capacity (rkbr) in the firing chamber (12), it is characterized in that, form the model of first fuel quantity (rkwfe), this first fuel quantity arrives in the wall film (32) by sparger (20).
2. method according to claim 1 is characterized in that, first fuel quantity (rkwfe) forms model as getting off, even the fuel quantity (rkev) that is sprayed by sparger (20) multiply by first coefficient (fwfe).
3. method according to claim 1 and 2 is characterized in that, forms the model that arrives second fuel quantity (rkbrwf) the firing chamber (12) from wall film (32).
4. method according to claim 3 is characterized in that, the fuel quantity (rkwf) in the wall film (32) preferably begins to form model by balance (48) by first fuel quantity (rkwfe) and second fuel quantity (rkbrwt) from starting value.
5. method according to claim 4 is characterized in that, this starting value is 0 when internal-combustion engine (12) starts.
6. according to the arbitrary described method of claim 3-5, it is characterized in that, second fuel quantity (rkbrwf) by make fuel quantity (rkwf) and second coefficient (fwfa) in the wall film (32) multiply each other (40) determine.
7. according to the described method of aforementioned arbitrary claim, it is characterized in that first coefficient (fwfe) and/or second coefficient (fwfa) depend at least one Operational Limits of internal-combustion engine (10).
8. according to the described method of aforementioned arbitrary claim, it is characterized in that, in multi-cylinder engine, each cylinder is formed independently the model of this influence.
9. according to the arbitrary described method of claim 3-8, it is characterized in that, determine the fuel quantity (rkev) that sparger (20) is sprayed, make the fuel quantity (rkbr) that arrives in the firing chamber (12) corresponding with ideal fuels amount (rksol).
10. according to the described method of aforementioned arbitrary claim, it is characterized in that first fuel quantity (rkwfe) of the heterogeneity of fuel (22) and/or second fuel quantity (rkbrwf) form different models (rkwfe1, rkwfe2, rkbrwf1, rkbrwf2).
11. a computer program is characterized in that, it is programmed to and is used in according in the described method of the arbitrary claim in front.
12. the electric storage medium that the control of an internal-combustion engine and/or regulating device are used is characterized in that, the computer program that is used for being used in the method for claim 1-10 is stored in this medium.
13. the control of an internal-combustion engine and/or regulating device is characterized in that, thereby it is programmed and is used in according in any described method among the claim 1-10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200510031030 DE102005031030A1 (en) | 2005-07-04 | 2005-07-04 | Method for operating an internal combustion engine |
| DE102005031030.3 | 2005-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101253318A true CN101253318A (en) | 2008-08-27 |
Family
ID=37055941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800243204A Pending CN101253318A (en) | 2005-07-04 | 2006-07-04 | Method for operation of an internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1904733A1 (en) |
| CN (1) | CN101253318A (en) |
| DE (1) | DE102005031030A1 (en) |
| WO (1) | WO2007003642A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545429A (en) * | 2015-09-16 | 2017-03-29 | 罗伯特·博世有限公司 | Method for running internal combustion engine |
| CN109268163A (en) * | 2017-07-18 | 2019-01-25 | 罗伯特·博世有限公司 | Method and apparatus for running the internal combustion engine with intake manifold injection |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2928417B1 (en) * | 2008-03-06 | 2010-12-31 | Peugeot Citroen Automobiles Sa | METHOD FOR DETERMINING THE QUANTITY OF FUEL TO BE INJECTED AT THE STARTING OF AN INDIRECT INJECTION ENGINE |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3842075A1 (en) * | 1988-12-14 | 1990-06-21 | Bosch Gmbh Robert | METHOD FOR DETERMINING THE FUEL QUANTITY |
| EP0959236B1 (en) * | 1992-07-03 | 2004-04-07 | Honda Giken Kogyo Kabushiki Kaisha | Fuel metering control system and cylinder air flow estimation method in internal combustion engine |
| GB9222328D0 (en) * | 1992-10-23 | 1992-12-09 | Lucas Ind Plc | Method of and apparatus for fuelling an internal combustion engine |
| US5762054A (en) * | 1996-09-13 | 1998-06-09 | Motorola Inc. | Ego based adaptive transient fuel compensation for a spark ignited engine |
-
2005
- 2005-07-04 DE DE200510031030 patent/DE102005031030A1/en not_active Withdrawn
-
2006
- 2006-07-04 WO PCT/EP2006/063865 patent/WO2007003642A1/en active Application Filing
- 2006-07-04 CN CNA2006800243204A patent/CN101253318A/en active Pending
- 2006-07-04 EP EP06764061A patent/EP1904733A1/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545429A (en) * | 2015-09-16 | 2017-03-29 | 罗伯特·博世有限公司 | Method for running internal combustion engine |
| CN106545429B (en) * | 2015-09-16 | 2021-12-21 | 罗伯特·博世有限公司 | Method for operating an internal combustion engine |
| CN109268163A (en) * | 2017-07-18 | 2019-01-25 | 罗伯特·博世有限公司 | Method and apparatus for running the internal combustion engine with intake manifold injection |
| CN109268163B (en) * | 2017-07-18 | 2022-06-14 | 罗伯特·博世有限公司 | Method and device for operating an internal combustion engine with intake pipe injection |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005031030A1 (en) | 2007-01-18 |
| WO2007003642A1 (en) | 2007-01-11 |
| EP1904733A1 (en) | 2008-04-02 |
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Open date: 20080827 |