CN102042103B - For the method for operation of combustion engine - Google Patents
For the method for operation of combustion engine Download PDFInfo
- Publication number
- CN102042103B CN102042103B CN201010527839.2A CN201010527839A CN102042103B CN 102042103 B CN102042103 B CN 102042103B CN 201010527839 A CN201010527839 A CN 201010527839A CN 102042103 B CN102042103 B CN 102042103B
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- cylinder
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- value
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- 238000000034 method Methods 0.000 title claims abstract description 77
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 30
- 239000000446 fuel Substances 0.000 claims abstract description 26
- 238000010790 dilution Methods 0.000 claims abstract description 19
- 239000012895 dilution Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 238000010304 firing Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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
- F02D41/008—Controlling each cylinder individually
- F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or air-fuel ratio
-
- 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
- F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
Abstract
The present invention relates to a kind of method for operation of combustion engine (10), wherein by analyze moment of torsion (33) when cylinder individually dilute gas mixture make cylinder (12a, 12b, 12c, 12d) balanced, wherein, described method comprises step below: the air-fuel mixture enleanment in the first cylinder (12a) is changed prespecified dilution value (34) by (a); B (), when applying actual speed signal (19), obtains first parameter (50) of the feature of the actual torque (46) of performance first cylinder (12a); C (), when applying described prespecified dilution value (34), obtains second parameter (54) of the feature of the rated torque (44) of performance first cylinder (12a); D () mates the fuel quantity (31) of input first cylinder (12a) according to the difference (48) between the first parameter (50) and the second parameter (54).
Description
Technical field
The present invention relates to a kind of method for operation of combustion engine.
Background technique
The method of the cylinder equilibrium making internal-combustion engine is become known for by prior art.Such as can individually analyze the signal of the excess air coefficient prober in the vent systems of internal-combustion engine by cylinder, to obtain cylinder other deviation of mixed gas composition.The known equally method based on rotating speed, now obtains the nonuniformity of engine speed, to reach the equilibrium of the moment of torsion on all cylinders of internal-combustion engine.In DE 195 27 218 B4, describe a kind of method, the tach signal of internal-combustion engine utilizes at least two filtering mechanism analyses with different frequencies in the method.
Open source literature below this External Reference: DE 43 19 677 C2(is for regulating the method and apparatus of the smoothness of operation of internal-combustion engine); DE 10 2,004 010 412 A1(is used for the apparatus and method of operation of combustion engine); DE 197 33 958 A1(is for correcting the method and apparatus of the tolerance of sensor wheel); And EP 0 929 794 B1(is for correcting the method and apparatus of the tolerance of sensor wheel).
Summary of the invention
The present invention proposes a kind of method for operation of combustion engine for this reason, wherein by analyze moment of torsion when cylinder individually dilute gas mixture make cylinder balanced, it is characterized in that, described method comprises step below:
Air-fuel mixture enleanment in the first cylinder is changed prespecified dilution value;
When applying actual speed signal, obtain the first parameter of the feature of the actual torque of performance first cylinder;
When applying described prespecified dilution value, obtain the second parameter of the feature of the rated torque of performance first cylinder;
The fuel quantity of input first cylinder is mated according to the difference between the first parameter and the second parameter.In addition important to the present invention feature is present in explanation below and accompanying drawing, and wherein this feature not only can individually, and can be all important to the present invention in different combinations, after this without the need to again explicitly pointing out.
Method according to the present invention has this advantage, namely can obtain the equilibrium of all cylinders of internal-combustion engine, and the postinjection that the physical dimension or carry out need not mating motor or vent systems is added.In addition the method does not rely on the number of cylinders of internal-combustion engine and not only at direct-injection engine, and can apply in naturally aspirated engine.
In addition the present invention is from this understanding, i.e. thin work, that is the cylinder (excess air coefficient is greater than 1) of thin mixed gas work is utilized to provide and thin corresponding less moment of torsion, contrary enriching work, that is utilize the cylinder (excess air coefficient is less than 1) of the mixed gas work of enriching not provide similar higher moment of torsion.This means, the characteristic parameter of the equilibrium of cylinder can be obtained particularly well in (part) thin period.
In addition the present invention utilizes the method described in patent documentation DE 195 27 218 B4 selectively at least partly, and the signal spectrum of revolution speed sensing wheel is by special filtering in the method, to obtain effective parameter, individually obtains Engine torque for cylinder.
The method step that following explanation is important:
In the first method step (a), the air-fuel mixture enleanment in the first cylinder is changed predetermined thin value.This thin value is such as selected like this, and namely the enriching unintentionally of greatest expected still also causes dilution in total amount.Due to the dilution determined, positive and negative fuel quantity error all causes the change of Engine torque and can obtain well thus.Self-evident, described " first " cylinder is for the flow process of the method, and wherein this first cylinder can be the arbitrary cylinder of internal-combustion engine.
Obtain the first parameter of the feature of the actual torque of expression first cylinder when applying actual speed signal in second step (b).It may be favourable for being used at this method described in DE 195 27 218 B4 at least partly.
Obtain the second parameter of the feature of the rated torque of expression first cylinder when applying described prespecified dilution value in third step (c).Obtaining of second parameter can be carried out when using in advance at the parameter obtained on reference vehicle in other words with reference to internal-combustion engine.
In the 4th step (d), the fuel injection amount of the first cylinder is according to the difference coupling between the first and second parameters.This can perform under the meaning regulated or mate.
Method step (a) to (d) does not require that all cylinders utilize the mixed gas work of dilution to be favourable simultaneously, otherwise the moment of torsion of combustion motor or waste gas value may produce shortcoming thus.In addition can apply with good result in whole rotating speeds of internal-combustion engine in other words load range according to method of the present invention.
The present invention alternatively specifies, when to be identified as the weak cylinder of moment of torsion when starting, abandon dilution according to step (a) and immediately by the actual torque obtained in step (b) by with rating value compare the fuel quantity mating and input cylinder, be namely generally improve.
In addition advise, at least in another cylinder, add rich mixture so in step (a)., make the average excess air coefficient value of internal-combustion engine substantially constant.During enforcement this method, advantageously keep waste gas value substantially constant by this way.
Application area according to method of the present invention comprises, and average excess air coefficient value is 1 or is not equal to 1.Therefore, except the application in so-called " uniform engine operation ", the method also can be not equal to 1 application to excess air coefficient value.Dilution value prespecified in step (a). when needing and/or in the step (c) the second parameter of the feature of performance rated torque to mate excess air coefficient value average accordingly.The method usually can be applied and can apply under diverse working state thus.
If step (b) to (d) regulate and coupling meaning under repeat, until the parameter of the amount of difference or the feature that shows it is no more than threshold value, or until have passed through the quantity of prespecified repetition, so the method work obtains better.The method can hierarchically perform thus, can minimize like this than making better in a single step inexactness that may be remaining.Can prespecified thresholding at this, can think that from it precision is enough and can the repetition of interrupt method step.Addedly or alternatively can count the quantity of repetition, with the repetition of interrupt method step same when reaching the limit values.This improvement of Application way step can reduce the fuel consume of internal-combustion engine further and improve smoothness of operation.
If all cylinder methods && steps of implementations (a) to (d) of combustion motor, the method especially meaningfully uses.By this way can balanced all cylinders successively.Repeat on all cylinders in this method, until the quantity that have passed through prespecified circulation is favourable.All cylinders of such as internal-combustion engine, successively through the method, then start at the first cylinder, repeat this circulation in an identical manner, and continue like this until interrupt.Overall can improve precision thus, because possible the interacting of less generation cylinder by this way.In addition by the interruption of the determination of the method, the unnecessary load of control and/or controlling device is avoided.
Subproposal, in step (a) to (d) period, the firing angle of the first cylinder adjusts to fixing value.This is favourable, because the moment of torsion that produces during cylinder operation stroke of firing angle has obvious impact.The firing angle adjustment fixing by this (carrying out at least in advance) obviously can improve precision, because it is not re-used as variable parameters input in method.
If the parameter of the feature of performance actual torque obtains from the spectral component of the determination of tach signal, the method work obtains better.That such as provided by sensor and unfiltered I. C. engine crankshaft tach signal is by means of at least two filter analysis.At this, it can relate to band-pass filter, its corresponding camshaft frequency of mean frequency, bent axle frequency and/or half spark rate.This describes in detail in DE 195 27 218 B4.The preferred information important to this method by this way, and the interference sections of tach signal of simultaneously at least decaying.The parameter of the feature of this performance actual torque can thus reliably and obtain simply.
Accompanying drawing explanation
The mode of execution of following example of the present invention is with reference to accompanying drawing explanation.Shown in figure:
Fig. 1 is the internal-combustion engine schematic diagram simplified,
Fig. 2 is the time plot for illustration of the method step, and
Fig. 3 is the flow chart for performing the method in control and/or controlling device.
Embodiment
Even if also apply identical reference character to the element of functional equivalent in all of the figs and parameter under different mode of executions.
Fig. 1 shows with current four cylinders 12a, 12b, 12c and 12d and the schematic diagram of the internal-combustion engine 10 of sparger 14a, 14b, 14c and 14d for burner oil of attaching troops to a unit.Internal-combustion engine 10 or be designed to petrol engine, or be designed to diesel engine.The bent axle 16 that four cylinders 12a, 12b, 12c and 12d thereunder mark works, and what wherein the sensor 18 of unshowned sensor wheel detected bent axle 16 works as front hook.Sensor 18 produces tach signal 19.The waste gas of four cylinders 12a, 12b, 12c and 12d is derived by outlet pipe 20, and their excess air coefficient value is detected by excess air coefficient prober 22.In the upper right portion of Fig. 1, illustrated that control and/or controlling device 24 are together with the pilot of leaving away and arriving indicated, and the electric storage medium 26 be included in inside it and computer program 28.In addition tach signal 19 also input control and/or controlling device 24.
Fig. 2 shows two time plots arranging up and down for method and thought is in principle described on the first cylinder.Two time shaft t are identical, but do not mark number.The fuel quantity 31(Q inputting this cylinder is respectively shown on the vertical scale in plotted curve up), in the plotted curve of below, y coordinate represents (average) moment of torsion 33(M attached troops to a unit during the working stroke of this cylinder).Two y coordinates do not mark number equally.
In plotted curve up, from time point 30, cylinder has changed dilution value 34 from the first rating value 32s dilution of fuel quantity Q and has reached the second rating value 35, that is, is introduced in cylinder by the less fuel determined.This carries out in the first method step (a).The current corresponding excess air coefficient value 1 of first rating value 32.The corresponding current too dense mixed gas of first actual value 36 of fuel quantity 31, and reduce the value 38 equal with dilution value 34 and reach the second actual value 40
Before time point 30, moment of torsion 33 is produced, its corresponding rating value 42 in the plotted curve of below.Conform to rating value 42 in the actual value of this moment of torsion 33, because the actual value 36 of fuel quantity 31 is too dense.In this approximate hypothesis, the enriching of mixed gas does not cause the obvious change of moment of torsion 33.
From time point 30, due to the dilution that described method causes, do not produce the rated torque 44 of expectation, but (approximately high) actual torque 46.Rated torque 44 and actual torque 46 differ difference 48.The feature of the too dense mixed gas first existed is showed, the first actual value 36 as corresponding in it in this difference 48 plotted curve up.
According to method step (b), obtain the first parameter 50 of the feature of performance actual torque 46 when applying (unshowned in fig. 2) tach signal 19.In other method step (c), obtain the second parameter 54 of the feature of performance rated torque 44 when applying described prespecified dilution value 34.Then in the 4th method step (d), the fuel quantity 31 of input cylinder is mated according to difference 48.So the actual value 36 and 40 of fuel quantity 31 is next at least about close to rating value 32 and 35.But this is not shown in Figure 2.
Unshowned is equally the situation similar with Fig. 2, and now the first actual value 36 of fuel quantity 31 is not too dense, but too rare.The actual value in the graph in this case with reference character 36,40 and 46 is not the top being in the rating value with mark 32,35 and 44, but in below.Additionally occur correspondingly lower than the new actual value of the moment of torsion 33 of rating value 42, because the cylinder 12 adjusting too rare generally provides less moment of torsion.
Fig. 3 shows the order of the method step be performed when the computer program 28 of the control and/or controlling device 24 that are used for operation of combustion engine 10 runs in flow charts.The execution of flow chart is mainly carried out from the top down.
In block 64, one of them cylinder 12(and 12a, 12b, 12c or 12d is selected from starting block 62s), to start this method.In method step (a), the air-fuel mixture enleanment in the cylinder 12 of selection is changed prespecified dilution value 34 in block 66.In at least one remaining cylinder 12, add rich mixture so simultaneously, make the average excess air coefficient value of internal-combustion engine 10 substantially constant.Average excess air coefficient value can be 1 or also can be not equal to 1.In addition the firing angle 67 of the cylinder 12 of current selection is adjusted to fixing value by block 66.
Method step (b) is obtained now in block 68 to the first parameter 50 of the feature of (average) actual torque 46 representing the cylinder 12 selected when applying actual speed signal 19.Be applied at this method described in DE 195 27 218 B4 to analyze tach signal 19.At this spectral component by means of the determination of band-pass filter tach signal.The corresponding camshaft frequency of the mean frequency of this band-pass filter, bent axle frequency and/or half internal-combustion engine ignition frequency.Self-evident, band-pass filter must not be exist in the mode of electronic parts and components, but such as can realize by means of sampling and digital filtering.
Method step (c) is obtained now in block 70 to the second parameter 54 of the feature of the rated torque 44 of the cylinder 12 that performance is selected when applying described prespecified dilution value 34.
Then in method step (d), in block 72, first form the difference 48 of the first parameter 50 and the second parameter 54.As long as the amount of difference 48 is in (" 0 ") under threshold value 74, adjustment or the coupling of the fuel quantity 31 of the input cylinder produced by the present invention are just thought enough.Branch returns block 64 and selects another cylinder 12 in this case, and the method continues as previously described in 66 thus.
If the amount of contrary difference 48 is on threshold value 74, then following coupling of carrying out fuel quantity 31 in block 76.If difference 48 is positive (namely too dense), then the fuel quantity 31 inputting cylinder 12 continues the value reducing to have changed coupling.If difference 48 is negative (namely too rare), then the fuel quantity 31 inputting cylinder 12 continues to improve the value having changed coupling.This coupling cylinder of fuel quantity 31 individually carries out and after the method that remains to terminates.In block 76 after coupling, the method continues in block 66 with step (a).
Monitoring 78 analyzes the process in block 64 and 72, with the flow process of controlling method.In addition monitor, the number of times of execution block 72 when select respectively cylinder 12.As long as lower than the quantity of repetition 80, monitoring just causes branch 72, and the flow process on block 64 is continued by selecting another cylinder 12.If or the quantity of circulation 82 is beyond all cylinders 12, monitoring 78 is branched off into end block 84 and terminates the method thus.This flow process where necessary can by terminating the interference of control and/or controlling device 24 or again start at starting block 62 place at any time.
Claims (8)
1. for the method for operation of combustion engine (10), wherein by analyze moment of torsion (33) when cylinder individually dilute gas mixture make cylinder (12a, 12b, 12c, 12d) balanced, it is characterized in that, described method comprises step below:
A air-fuel mixture enleanment in the first cylinder (12a) is changed prespecified dilution value (34) by ();
B (), when applying actual speed signal (19), obtains first parameter (50) of the feature of the actual torque (46) of performance first cylinder (12a);
C (), when applying described prespecified dilution value (34), obtains second parameter (54) of the feature of the rated torque (44) of performance first cylinder (12a);
D () mates the fuel quantity (31) of input first cylinder (12a) according to the difference (48) between the first parameter (50) and the second parameter (54).
2. method according to claim 1, is characterized in that, in step (a). by the air-fuel mixture enrichment at least in another cylinder (12b, 12c, 12d), makes the average excess air coefficient value of internal-combustion engine (10) substantially constant.
3. method according to claim 2, is characterized in that, described average excess air coefficient value is 1 or is not equal to 1.
4. the method according to any one of Claim 1-3, it is characterized in that, described step (b) to (d) repeats under the meaning regulated or mate, until the amount of difference (48) or show it the parameter of feature lower than threshold value (74), or until have passed through the quantity of prespecified repetition (80).
5. the method according to any one of Claim 1-3, is characterized in that, all cylinders (12) of combustion motor (10) perform step (a) to (d).
6. method according to claim 5, is characterized in that, described method repeats, until have passed through the quantity of prespecified circulation (82).
7. the method according to any one of Claim 1-3, is characterized in that, in step (a) to (d) period, the firing angle (67) of described first cylinder (12a) is adjusted to fixing value.
8. the method according to any one of Claim 1-3, is characterized in that, the parameter (50) of the feature of described performance actual torque (46) obtains from the spectral component of the determination of tach signal (19).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009045908.1 | 2009-10-22 | ||
| DE200910045908 DE102009045908A1 (en) | 2009-10-22 | 2009-10-22 | Method for operating internal combustion engine, involves making mixture in cylinder in predetermined weakening value, and determining actual torque of cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102042103A CN102042103A (en) | 2011-05-04 |
| CN102042103B true CN102042103B (en) | 2015-10-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010527839.2A Expired - Fee Related CN102042103B (en) | 2009-10-22 | 2010-10-21 | For the method for operation of combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102042103B (en) |
| DE (1) | DE102009045908A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011080859A1 (en) * | 2011-08-11 | 2013-02-14 | Robert Bosch Gmbh | Method and device for monitoring a control device for operating an engine system |
| CN104295388B (en) * | 2014-08-14 | 2017-02-15 | 吉林大学 | Engine all-cylinder nonuniformity compensation control method based on indicated torque |
| CN113357036B (en) * | 2021-07-27 | 2023-05-23 | 潍柴动力股份有限公司 | Engine rotating speed adjusting method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19527218B4 (en) * | 1994-12-23 | 2004-03-18 | Robert Bosch Gmbh | Method and device for regulating the smooth running of an internal combustion engine |
| CN101397941A (en) * | 2007-09-27 | 2009-04-01 | 株式会社日立制作所 | Engine control apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4274255A (en) * | 1979-05-07 | 1981-06-23 | United Technologies Corporation | Control for start-up of a gas turbine engine |
| DE4319677C2 (en) | 1993-06-14 | 2002-08-01 | Bosch Gmbh Robert | Method and device for regulating the smooth running of an internal combustion engine |
| DE19733958A1 (en) | 1997-08-06 | 1999-02-11 | Bosch Gmbh Robert | Method and device for correcting tolerances of a sensor wheel |
| DE102004010412B4 (en) | 2004-03-01 | 2018-03-15 | Robert Bosch Gmbh | Device for operating an internal combustion engine |
| US7347184B2 (en) * | 2005-11-01 | 2008-03-25 | Denso Corporation | Controller and controlling method for internal combustion engine |
| DE102006026390B4 (en) * | 2006-06-07 | 2017-04-27 | Bayerische Motoren Werke Aktiengesellschaft | Electronic control device for controlling the internal combustion engine in a motor vehicle |
-
2009
- 2009-10-22 DE DE200910045908 patent/DE102009045908A1/en not_active Ceased
-
2010
- 2010-10-21 CN CN201010527839.2A patent/CN102042103B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19527218B4 (en) * | 1994-12-23 | 2004-03-18 | Robert Bosch Gmbh | Method and device for regulating the smooth running of an internal combustion engine |
| CN101397941A (en) * | 2007-09-27 | 2009-04-01 | 株式会社日立制作所 | Engine control apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102042103A (en) | 2011-05-04 |
| DE102009045908A1 (en) | 2011-04-28 |
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