CN103748341B - Method for operating an internal combustion engine - Google Patents
Method for operating an internal combustion engine Download PDFInfo
- Publication number
- CN103748341B CN103748341B CN201280040802.4A CN201280040802A CN103748341B CN 103748341 B CN103748341 B CN 103748341B CN 201280040802 A CN201280040802 A CN 201280040802A CN 103748341 B CN103748341 B CN 103748341B
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- Prior art keywords
- cylinder
- angular acceleration
- meansigma methodss
- combustion engine
- internal combustion
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1497—With detection of the mechanical response of the engine
- F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
-
- 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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1012—Engine speed gradient
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a method for operating an internal combustion engine (11). In the method, a plurality of angular accelerations of a crankshaft (13) of the internal combustion engine (11) are sensed in a plurality of working cycles of the cylinder (12) and a mean value of the angular accelerations is determined on the basis of the plurality of angular accelerations of the cylinder (12) for at least one cylinder (12) of the internal combustion engine (11). The internal combustion engine (11) is controlled on the basis of the plurality of angular accelerations and the mean value.
Description
Technical field
The present invention relates to a kind of method of internal combustion engine and a kind of related device for internal combustion engine.The present invention is special
It is the method for the running stability relating to improve internal combustion engine.
Background technology
The gasoline engine that internal combustion engine for example carries multi cylinder can occur because of combustion process scattered error particularly in free-runing operation
Run unstable.This scattered error may because the unfavorable ignition condition for example caused by distance between sparking-plug electrode, injection valve scattered
Difference, the scattered error particularly in terms of flow or jet offer and strengthen.If internal combustion engine is used in such as vehicle such as car or truck
In, this unstable in idle running can allow vehicle driver or passenger feel to disturb.
Relatively, a kind of band fuel-injected automotive gasoline engines known to DE 43 03 332 C2.This gasoline engine includes：
Combustion chamber pressure sensor, it to identify the lean-limit of aerating mixture by stopping working；Ignition installation, it can produce at least
Spark after one（Nachfunke）Or the pilot spark that burning is permanent.Caused by the pilot spark of rear spark or after-combustion and light
In the case of combustion process pressure delay lifting, and/or the igniting share arriving apportioned by the first spark or follow-up spark, as knowledge
Do not go out the signal of mixture lean-limit.However, combustion chamber pressure sensor and this ignition installation can lead to gasoline engine relatively
High cost of implementation.
A kind of relatively waste gas purification of the internal combustion engine with more than one cylinder also known to DE 19758018 A1
Device.This waste gas purification apparatus has accumulator-type catalytic converter, and wherein, waste gas is continuously flowed in accumulator-type catalytic converter, thus once
Engine lean runs and just harmful substance is absorbed in waste gas memorizer, and the oxygen concentration reduction once waste gas just gives off
Harmful substance.During the discharge of poisonous waste stage, electromotor is run with the total λ value being slightly above stoichiometric ratio λ=1.For this
A part of cylinder rich oil can be selectively made to run, and the still oil-poor operation of another part cylinder.
Additionally, well known in the art for being produced by balance cylinder is come to the adjustment of the injecting time of each cylinder
Moment of torsion method.But under some working conditions, it is unstable that this moment of torsion equilibrium can lead to electromotor to run, and its mode is for example
For each cylinder sets up moment of torsion in different time, thus the moment of torsion of individual cylinder fluctuates in time.
Content of the invention
Therefore, the purpose of the present invention is, proposes a kind of reliable method for operating internal combustion engine facilitating implementation, it guarantees internal combustion
Machine especially smoothly runs in idle running.
According to the present invention, using a kind of according to the present invention for avoiding in internal combustion engine flame-out and improving and run
The method of stationarity and a kind of according to the present invention for avoiding in internal combustion engine flame-out and improving running stability
Device, you can realize described purpose.A kind of according to the present invention for avoiding flame-out during in internal combustion engine and improving
In the method for running stability, there is at least one cylinder of described internal combustion engine, have steps of：In at least one gas described
Multiple angular acceleration of the bent axle of described internal combustion engine are detected in multiple driving strokes of cylinder；Accelerated according to multiple angles of described cylinder
Spend and to determine the meansigma methodss of described angular acceleration；Flat with described with multiple angular acceleration that determination shows at least one cylinder described
The statistical parameter of the deviation of average；And control internal combustion engine by following steps according to multiple angular acceleration and meansigma methodss：As
Fruit knows that at least one cylinder described stops working, according to the statistical parameter determining at least one cylinder described and predetermined threshold value
The fuel injection amount to change at least one cylinder described for the comparison.A kind of according to the present invention for keeping away in internal combustion engine
Exempt from device that is flame-out and improving running stability to include：Crankshaft sensor for making described device and internal combustion engine couples
Input, crankshaft sensor provides the signal of the angle position of the bent axle for determining internal combustion engine；And processing unit, this process list
Unit is designed to detect bent axle in multiple driving strokes of this at least one cylinder at least one cylinder of internal combustion engine
Multiple angular acceleration；Determine the meansigma methodss of angular acceleration according to multiple angular acceleration of described cylinder；With according to multiple angles
Acceleration and meansigma methodss are controlling internal combustion engine；If with know that at least one cylinder described stops working, according to for described at least one
The individual statistical parameter of cylinder determination and the comparison of predetermined threshold value to change the fuel injection amount of at least one cylinder described.
According to the present invention it is proposed that a kind of method for operating internal combustion engine.In the method, at least one gas of internal combustion engine
Cylinder, detects multiple angular acceleration of I. C. engine crankshaft in multiple driving strokes of cylinder, and is accelerated according to multiple angles of cylinder
Spend and to determine angular acceleration meansigma methodss.Control internal combustion engine according to multiple angular acceleration and meansigma methodss, its mode is, for example, to change
Cylinder injection amount.The angular acceleration of bent axle for example can be by means of the sensing wheel being placed on bent axle and high-precision crankshaft angles
Sensor is detecting.Replace angular acceleration, can alternatively detect angular velocity or so-called time period, make a reservation in crank rotation
Angle during required time.Angular acceleration, angular velocity and time period for example can be by means of the current rotating speeds of internal combustion engine
Mutually convert, thus equivalent parameterss can be considered as, and equivalent effect be applied to the method for the present invention.If there is flame-out,
Crankshaft angular acceleration during this driving stroke will diminish such that it is able to for example by current angular and Previous work
Relatively being inferred to of the angular acceleration meansigma methodss of stroke stops working.Generally there is this biography on bent axle due to Modern Internal-Combustion Engine
Sense wheel and accordingly high-precision rotary angle transmitter, institute can inexpensively realize with the inventive method.In addition favourable
It is, less when being determined to be flame-out or combustion torque by angular acceleration（Inferior combustion position accordingly）And then occur bright
When the regulation of significant difference is intervened, methods described just changes the control to internal combustion engine.
It is proposed according to the present invention to a kind of method of work of the internal combustion engine with multiple cylinders.In the method, in internal combustion
Multiple angular acceleration of I. C. engine crankshaft are detected in multiple driving strokes of at least two cylinders of machine.According at least two cylinders
Multiple angular acceleration determining angular acceleration meansigma methodss.For at least one of at least two cylinders cylinder, according at least
Multiple angular acceleration of one cylinder and meansigma methodss are controlling internal combustion engine.For example can be accelerated according to multiple angles of this cylinder
Degree to adjust the emitted dose of at least one cylinder with meansigma methodss.As it was previously stated, angular acceleration can be by means of the sensing on bent axle
Wheel and high-precision crankshaft angle sensor to be detected for example in the form of the time period.The method thus can also be inexpensively
Modern Internal-Combustion Engine is realized.Detect multiple angular acceleration and consider to determine averagely in multiple driving strokes of multiple cylinders
Value, thus for example can quickly and reliably identify lasting the stopping working in cylinder, this is because the angle of flame-out cylinder accelerates
Degree differs markedly from the meansigma methodss of all cylinders.The method thus can also cylinder thoroughly stop working extremely unfavorable under conditions of
Reliably work.
According to a kind of embodiment, in order to control internal combustion engine, determine statistical parameter, which show the many of at least one cylinder
Individual angular acceleration and the deviation of meansigma methodss.This can be for example than standard deviation As be well known in the art.To internal combustion engine
Control, the such as change to associated cylinder emitted dose, can according to this statistical parameter and threshold value relatively carrying out.By true
Determine statistical parameter, even if under different operating conditions particularly can also be reliably real in the case of internal-combustion engine rotational speed difference
Apply methods described.
According to a kind of embodiment, the control to internal combustion engine is included according to the statistical parameter determining for cylinder and threshold value
Compare and to change the fuel injection amount of at least one cylinder.Here for example can improve the fuel injection amount of at least one cylinder
Predetermined percentage ratio, if know that at least one cylinder stops working, if that is, statistical parameter shows the work at least one cylinder
In stroke, angular acceleration is significantly less than angular acceleration meansigma methodss（Desired angular acceleration values）.
According to another embodiment, at least two cylinders for internal combustion engine determine corresponding system respectively as previously mentioned
Meter parameter.Additionally, determining the meansigma methodss of the statistical parameter determining at least two cylinders that is to say, that obtaining statistics ginseng
The meansigma methodss of number.The fuel injection amount of one of at least two cylinders cylinder, according to the statistical parameter determining for this cylinder
With relatively being changed of statistical parameter meansigma methodss.If for example determining standard deviation as statistical parameter, in this enforcement
Also determine that the meansigma methodss of standard deviation in mode, and the standard deviation according to cylinder and standard deviation meansigma methodss relatively changing
The amount of fuel of this cylinder.By the change of fuel injection amount to be compared to each other to the standard deviation of cylinder, thus lead to gas
Cylinder equally smoothly runs.
According to another embodiment, determine statistical parameter, its mode is to determine in multiple angular acceleration and angular acceleration
Multiple differences between meansigma methodss accelerate that is to say, that determining for each angular acceleration in multiple angular acceleration at this angle
Respective differences between degree and angular acceleration meansigma methodss.Subsequently also these differences to be weighted.If angular acceleration is more than average
Value, is just weighted to described difference with the first weighting factor.If angular acceleration is less than meansigma methodss, just with the second weighting factor pair
Described difference is weighted.First weighting factor is less than the second weighting factor.Thus as statistical parameter determine angular acceleration with
The weighted deviation of meansigma methodss.Compared to good combustion position（Angular acceleration is more than meansigma methodss）, combustion position is inferior（Angle
Acceleration is less than meansigma methodss）When weighted deviation larger.Thus can realize rapidly and effectively adjusting, thus internal combustion engine
Promptly step into even running.According to a kind of embodiment, the value of the first weighting factor is 0, and the value of the second weighting factor is 1.
In this case, statistical parameter only considers inferior combustion case.
According to the present invention it is also proposed that a kind of device for internal combustion engine.This device is included for making device and internal combustion engine
Input and processing unit that crankshaft sensor couples.Crankshaft sensor provides the letter for determining I. C. engine crankshaft angle position
Number.At least one cylinder that processing unit can be directed to internal combustion engine detects the multiple of bent axle in multiple driving strokes of this cylinder
Angular acceleration, and determine angular acceleration meansigma methodss according to multiple angular acceleration of cylinder.Processing unit accelerates according to multiple angles
Degree to control internal combustion engine with meansigma methodss.Processing unit for example changes at least one cylinder according to multiple angular acceleration and meansigma methodss
Fuel injection amount.Because combustion position is inferior or occurs flame-out in the driving stroke of a cylinder, in this driving stroke
In the angular acceleration of this cylinder reduced compared to normal combustion.Therefore, average with angular acceleration by current angular
Value comparison, can so that inferior or wrong combustion position in driving stroke is determined using simple mode, and by with
In driving stroke afterwards, the suitable control of internal combustion engine is avoided, its mode is, for example, to improve the emitted dose of cylinder.
Additionally, a kind of according to the present invention it is proposed that device of the internal combustion engine for having multiple cylinders.This device include for
Make input and processing unit that device coupled with I. C. engine crankshaft sensor.Crankshaft sensor is provided for determining internal combustion engine
The signal of bent axle current angle position.Processing unit is designed at least two gas based on crank angle position in internal combustion engine
Determine multiple angular acceleration of bent axle in multiple driving strokes of cylinder, and come according to multiple angular acceleration of at least two cylinders true
Determine angular acceleration meansigma methodss.For at least one of at least two cylinders cylinder, processing unit is according at least one cylinder
Multiple angular acceleration and meansigma methodss are controlling internal combustion engine.The work punching of the difference cylinder of internal combustion engine is take into account in this meansigma methods
The angular acceleration of journey, thus can by the comparison of the current angular of specific cylinder and meansigma methodss adopt simple mode Lai
Determine the combustion wave rate between cylinder, and by being corrected to the control of internal combustion engine.The operating of internal combustion engine thus can be improved
Stationarity.
Aforementioned means can be designed to implement preceding method, thus also contains the advantage described in associated methods.
According to the present invention it is also proposed that a kind of method for operating internal combustion engine, wherein, for internal combustion engine at least one cylinder at this
The angular acceleration of I. C. engine crankshaft is detected in the driving stroke of cylinder, and in being controlled according to this angular acceleration and predetermined threshold value
Combustion engine.Predetermined threshold value for example can include the value setting, or for example bent by means of feature according to engine operating conditions
Line race is determining.The mode of given threshold is if the angular acceleration of cylinder is less than threshold value, for example, to identify low in idle running
Bad combustion position.Further according to the present invention, a kind of corresponding device for internal combustion engine is proposed, it is included for making device
Couple to determine input and the processing unit of I. C. engine crankshaft angle position with I. C. engine crankshaft sensor.Processing unit quilt
It is designed to detect the angular acceleration of bent axle in the driving stroke of this cylinder at least one cylinder of internal combustion engine, and according to
This angular acceleration to control internal combustion engine with the threshold value setting.
Finally, a kind of vehicle is proposed according to the present invention, it includes internal combustion engine and a kind of aforementioned means.This internal combustion engine equipped with
Crankshaft sensor, it provides the signal for determining I. C. engine crankshaft angle position.This device has for making device and song
The input that axle sensor couples, and couple with crankshaft sensor.In the work of internal combustion engine, this device can as previously mentioned that
Sample controls internal combustion engine, thus improving the smoothness of operation of internal combustion engine, and is avoided that inferior combustion position and stops working.
Employing in the above-mentioned introduction of the present invention for example can be with the crankshaft angular acceleration of crankshaft sensor detection.Substitute
Ground is it is also possible to be used in corresponding on the other rotary units being rotated according to I. C. engine crankshaft of camshaft or internal combustion engine
Sensor is detecting acceleration.
Brief description
The present invention is described in detail in detail with reference to the accompanying drawings.
Fig. 1 illustrates the vehicle according to an embodiment of the invention；
Fig. 2 is shown schematically for determining the standard deviation of a cylinder and the deviation of all cylinder stdev average
Algorithm mechanism；
Fig. 3 is shown schematically for adjusting the algorithm mechanism of the amount of fuel of each cylinder；
Fig. 4 illustrates the impact to internal combustion engine running stability of method according to an embodiment of the invention.
Specific embodiment
Fig. 1 illustrates vehicle 10, and it carries internal combustion engine 11 and the device 15 for internal combustion engine 11.Internal combustion engine 11 includes four gas
Cylinder 12, these cylinders work on same bent axle 13.Bent axle 13 is provided with（Unshowned）Sensing wheel, this sensing wheel with
Bent axle 13 rotates together, and provides high-precision bent axle letter for device 15 in the case of combining with crankshaft angle sensor 14
Number.Device 15 is coupled with crankshaft angle sensor 14 by input 16.Device 15 can be for example the electromotor of internal combustion engine 11
A part for electronic mechanism, or a single device.Device 15 can include electronic control mechanism, such as microprocessor
Device.Base when device 15 can also include, so as to determine the angular acceleration of bent axle 13 in combination with high-precision crank shaft signal.
The working method of device 15 is explained in detail below.In the operation of internal combustion engine 11, device 15 is during a driving stroke
Detect the angular acceleration of bent axle 13 for each cylinder 12.For each cylinder 12 according to be specified in its angular acceleration Lai
Determine the standard deviation of angular acceleration.The angular acceleration for example determining respective cylinder 12 for this and all cylinders are in its driving stroke
The standard deviation of the meansigma methodss of the angular acceleration of period.Alternatively, for example can also determine the angular acceleration of respective cylinder 12 with
The standard deviation of the angular acceleration meansigma methodss of respective cylinder.In the standard deviation interval determining cylinder 12 it may be considered that diagonal accelerate
Degree and the deviation of corresponding meansigma methodss are weighted, thus to showing inferior combustion position（Actual angular acceleration is less than meansigma methodss）'s
Deviation gives more considerations.If the standard deviation of cylinder is more than predetermined threshold with the average value of all cylinder standard deviations
Value, indicate that due to combustion position is inferior or due to flameout cause cylinder run unstable it is necessary to change respective cylinder
Emitted dose.
Fig. 2 and 3 illustrates the working method for the device 15 with the such as internal combustion engine of four cylinders.Fig. 2 illustrates to determine
The standard deviation of one cylinder and the deviation of all cylinder standard deviation meansigma methodss.Averaging unit 65 forms four standard deviations
The meansigma methodss of 61-64, and this meansigma methods is conveyed to subtractor 66.Also the standard deviation 61 of a cylinder is conveyed to subtractor
66, and determine the difference between the standard deviation of this cylinder and all cylinder standard deviation meansigma methodss.This difference is in outfan 67
Output, for subsequent treatment.
Fig. 3 illustrates the algorithm mechanism for adjusting each cylinder amount of fuel.Provide for each cylinder in input 21-24
The angular acceleration standard deviation of a such as cylinder is previous with the standard deviation meansigma methodss of all cylinders（Fig. 2）Determine is inclined
Difference.Alternatively, the current slot of each cylinder for example can also be provided in input 21-24 for each cylinder.Input 21-
Deviation on 24 or time period are compared with threshold value 20 respectively in corresponding comparator 25-28.Defeated according to comparator 25-28
Go out, multiplier 29-32 selectively switches on amount of fuel raising value 57 or null value 58.Amount of fuel raising value 57 can be absolute value or
Relative value.Amount of fuel raising value 57 can be for example 3%.The corresponding output of multiplier 29-32 is on the one hand directly tired via arrange
Plus device 33-36 and 37-40 and buffer 41-44 reaches corresponding output end 45-48 of four cylinders, on the other hand reach other gas
The accumulator 49-52 of cylinder.Factor 53-56 such as 1/3rd is multiplied by the output of accumulator 49-52, then in accumulator 33-36
Place is added.Introduce the working method of the algorithm mechanism shown in Fig. 3 referring to example.
If cylinder flow into the deviation of algorithm mechanism or time period not less than threshold value 20 via input 21-24, also
It is to say, if all cylinders all have good combustion position and flameout, all multiplier 29-32 just connect
To null value 58.Null value 58 is not result in any change by accumulator 33-36 or 49-52, thus the injection at outfan 45-48
Amount output valve keeps constant.But if for example in the first cylinder（Its deviation or time period are flowed into algorithm machine via input 21
In structure）In occur in that inferior combustion position, this point will be known by the comparison with threshold value 20 by comparator 25, then take advantage of
Musical instruments used in a Buddhist or Taoist mass 29 is switched to amount of fuel raising value 57.Assume that amount of fuel raising value 57 is 3%, just defeated via accumulator 33 for 3% this value
Give accumulator 37, its recent fuel oil value is sent to memorizer 41 plus 3%.Thus the fuel oil of the first cylinder is sprayed
Amount improves 3%.Amount of fuel raising value 57 is also delivered to accumulator 50-52 from multiplier 29.Outfan in accumulator 50-52
Produce 3% value respectively, it is decreased to 1/3rd by factor 54-56.Thus the outfan in factor 54-56 produces respectively
1% value.In accumulator 34-36, deduct this 1% value from the null value 58 conveying via multiplier 30-32, thus incite somebody to action -1%
It is conveyed to accumulator 38-40.The recent injection quantity value of cylinder 2-4 thus reduces 1% respectively.In a word, there is inferior combustion position
The emitted dose of cylinder thus improve 3%, meanwhile, the emitted dose of remaining cylinders reduces 1% respectively.
Fig. 4 illustrates the working method of preceding method.The three width curves on the left side illustrate and are not adopting preceding method situation
The operating steadily of lower internal combustion engine, mild impulse and hard stop.The three width curve charts on the right have gone out in the case of using preceding method
The operating steadily of internal combustion engine, mild impulse and hard stop.Upper left curve chart was shown in the internal combustion engine operation time of 700 seconds
Standard deviation when internal combustion engine operation with four cylinders is steady in the case of not adopting preceding method.Top-right curve chart
Be shown in using respective standard deviation when operating steadily within the length similar time in the case of preceding method, through 77 seconds it
After take regulation intervene, wherein, a cylinder（First cylinder）Amount of fuel increased 3%, and the amount of fuel of other cylinder is respectively
Decrease 1%.Intervene as described regulation, from another standard deviation curves when operating steadily, is passed through on this another curve
Significantly improve running stability.Can also significantly reduce the mild impulse causing because of the inferior combustion position in cylinder time
Number.As from the curve chart in the middle of the left side, in the case of not using preceding method, the particularly first cylinder occurrence number increases
Mild impulse.As from the curve chart in the middle of the right, after the other cylinder oil-poor 1% of the first cylinder rich oil 3%, this
The number of times of mild impulse significantly reduces.Due to adopting methods described, hard stop is that real stopping working can also significantly reduce, as follows
The two width curve chart references in face illustrate.In the case of not adopting the method for the present invention, as shown in the curve chart of lower left, the first cylinder
Occur in that some hard stops in run duration.In the case of using preceding method, as shown in the curve chart of lower right, hard stop does not occur
Machine.
Claims (8)
1. a kind of for avoiding method that is flame-out and improving running stability in internal combustion engine, there is described internal combustion engine
（11）At least one cylinder（12）, have steps of：
- at least one cylinder described（12）Multiple driving strokes in detect described internal combustion engine（11）Bent axle（13）Many
Individual angular acceleration；
- according to described cylinder（12）The meansigma methodss to determine described angular acceleration for multiple angular acceleration；With
- determination shows at least one cylinder described（12）The deviation of multiple angular acceleration and described meansigma methodss statistical parameter
（21-24）；And
- control internal combustion engine by following steps according to multiple angular acceleration and meansigma methodss（11）：
If-know at least one cylinder described（12）Flame-out, according to at least one cylinder described（12）The statistics determining
Parameter（21-24）With predetermined threshold value（20）Relatively to change at least one cylinder described（12）Fuel injection amount.
2. the method for claim 1,
If-know at least one cylinder described（12）Flame-out, wherein, described statistical parameter（21-24）Show described at least
One cylinder（12）Multiple driving strokes in angular acceleration be significantly less than the meansigma methodss of angular acceleration, then described at least one
Individual cylinder（12）Fuel injection amount improve predetermined percentage ratio.
3. the method for claim 1,
- determine two cylinders（12）Statistical parameter（21-24）And form the statistical parameter of at least two cylinders（21-24）
Meansigma methodss；And
- according to for described cylinder（12）The statistical parameter determining（21-24）With described statistical parameter（21-24）Meansigma methodss
Comparison improve described at least two cylinders（12）One of cylinder fuel injection amount, wherein as statistical parameter（21-
24）Determine standard deviation, and determine the meansigma methodss of described standard deviation, and the standard deviation according at least one cylinder described
Difference relatively to change at least one cylinder described with the meansigma methodss of described standard deviation（12）Amount of fuel, method be by combustion
The change of oil spurts amount comes to described at least two cylinders（12）Standard deviation be compared to each other.
4. the method for claim 1, wherein determine statistical parameter（21-24）Step include：
Multiple differences between multiple angular acceleration and angular acceleration meansigma methodss for-the determination；With
- multiple differences are weighted, wherein, if corresponding angular acceleration is more than meansigma methodss, just with the first weighting factor to institute
State difference to be weighted, if corresponding angular acceleration is less than meansigma methodss, just with the second weighting factor, described difference is weighted, its
In, the first weighting factor is less than the second weighting factor.
5. method as claimed in claim 4,
If-described angular acceleration is more than meansigma methodss, just with the first weighting factor, described difference is weighted；And
If-described angular acceleration is less than meansigma methodss, just with the second weighting factor, described difference is weighted；
- wherein, described first weighting factor is less than the second weighting factor, thus as statistical parameter（21-24）Determine described
Angular acceleration and meansigma methodss weighted deviation, wherein, when combustion position is inferior, enter less than the angular acceleration of meansigma methodss
Described weighted deviation, and when combustion position is good, enters described weighted inclined more than the angular acceleration of meansigma methodss
Difference.
6. method as claimed in claim 5, if the first weighting factor switches to value 0, and the second weighting factor has value
1, then in statistical parameter（21-24）In only consider inferior combustion case.
7. the method for claim 1, as described bent axle（13）Angular acceleration equivalent parameterss, detect described angle add
The time period of speed, bent axle described in the described time period（13）Have rotated predetermined angle.
8. a kind of for avoiding device that is flame-out and improving running stability in internal combustion engine（15）, including：
- it is used for so that described device and internal combustion engine（11）Crankshaft sensor（14）The input coupling（16）, crankshaft sensor
There is provided for determining internal combustion engine（11）Bent axle（13）Angle position signal；With
- processing unit, this processing unit is designed to for internal combustion engine（11）At least one cylinder（12）
- in this at least one cylinder（12）Multiple driving strokes in detect bent axle（13）Multiple angular acceleration；
- according to described cylinder（12）The meansigma methodss to determine angular acceleration for multiple angular acceleration；With
- control internal combustion engine according to multiple angular acceleration and meansigma methodss（11）；With
If-know at least one cylinder described（12）Flame-out, according to at least one cylinder described（12）The statistics determining
Parameter（21-24）With predetermined threshold value（20）Relatively to change at least one cylinder described（12）Fuel injection amount.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011111412.6 | 2011-08-23 | ||
| DE102011111412A DE102011111412A1 (en) | 2011-08-23 | 2011-08-23 | Method for operating an internal combustion engine |
| PCT/EP2012/003398 WO2013026534A1 (en) | 2011-08-23 | 2012-08-09 | Method for operating an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103748341A CN103748341A (en) | 2014-04-23 |
| CN103748341B true CN103748341B (en) | 2017-02-22 |
Family
ID=46682794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280040802.4A Expired - Fee Related CN103748341B (en) | 2011-08-23 | 2012-08-09 | Method for operating an internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2748449A1 (en) |
| CN (1) | CN103748341B (en) |
| DE (1) | DE102011111412A1 (en) |
| WO (1) | WO2013026534A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013217725B3 (en) * | 2013-09-05 | 2014-08-28 | Continental Automotive Gmbh | Improved signal acquisition for cylinder equalization in a motor vehicle |
| US9752517B2 (en) * | 2015-10-30 | 2017-09-05 | Ford Global Technologies, Llc | Method for air/fuel imbalance detection |
| DE102017128183A1 (en) | 2017-11-28 | 2019-05-29 | Bdr Thermea Group B.V. | Method for controlling an internal combustion engine in a combined heat and power plant and device for detecting operating parameters of an internal combustion engine in a combined heat and power plant |
| US10961934B2 (en) * | 2018-12-11 | 2021-03-30 | Hyundai Motor Company | Method for controlling engine combustion for reducing irregular vibration caused by unstable engine combustion |
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- 2012-08-09 WO PCT/EP2012/003398 patent/WO2013026534A1/en active Application Filing
- 2012-08-09 EP EP12747978.0A patent/EP2748449A1/en not_active Withdrawn
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2013026534A1 (en) | 2013-02-28 |
| DE102011111412A1 (en) | 2013-02-28 |
| CN103748341A (en) | 2014-04-23 |
| EP2748449A1 (en) | 2014-07-02 |
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