CN102171428A - Method and device for detecting a knocking occurrence during a switching process between operating modes of an internal combustion engine - Google Patents
Method and device for detecting a knocking occurrence during a switching process between operating modes of an internal combustion engine Download PDFInfo
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- CN102171428A CN102171428A CN200980138731XA CN200980138731A CN102171428A CN 102171428 A CN102171428 A CN 102171428A CN 200980138731X A CN200980138731X A CN 200980138731XA CN 200980138731 A CN200980138731 A CN 200980138731A CN 102171428 A CN102171428 A CN 102171428A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 238000012546 transfer Methods 0.000 claims description 24
- 238000010304 firing Methods 0.000 claims description 16
- 239000000446 fuel Substances 0.000 claims description 13
- 230000003044 adaptive effect Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 5
- 230000010354 integration Effects 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005474 detonation Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Classifications
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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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0613—Switch-over from one fuel to another
- F02D19/0615—Switch-over from one fuel to another being initiated by automatic means, e.g. based on engine or vehicle operating conditions
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0626—Measuring or estimating parameters related to the fuel supply system
- F02D19/0634—Determining a density, viscosity, composition or concentration
- F02D19/0636—Determining a density, viscosity, composition or concentration by estimation, i.e. without using direct measurements of a corresponding sensor
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
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- 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
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/152—Digital data processing dependent on pinking
- F02P5/1527—Digital data processing dependent on pinking with means allowing burning of two or more fuels, e.g. super or normal, premium or regular
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
- G01L23/225—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines circuit arrangements therefor
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- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Ignition Timing (AREA)
Abstract
The invention relates to a method for detecting a knocking occurrence during a switching process between operating modes of an internal combustion engine (2). The method comprises the following steps: - recording a course of an acoustic signal (ikr) of an internal combustion engine (2); - determining a reference level (rkr) of the acoustic signal which corresponds to a specification of a basic engine noise according to the course of the acoustic signal (ikr); and - detecting a knocking occurrence according to the reference level (rkr); wherein the reference level (rkr) of the acoustic signal is determined according to the switching process between the operating modes of the internal combustion engine (2).
Description
Technical field
The present invention relates to the pinking identification of internal-combustion engine, especially the internal-combustion engine that can optionally move with different fuel types.
Background technique
In order to discern pinking, in internal-combustion engine, be typically provided with the sonic transducer of the solid-borne noise signal of detection of engine cylinder body.Pinking identification is based on the integration of the solid-borne noise signal of filtered and rectification or the reference level of averaging and having calculated thus, the integration of solid-borne noise signal only carries out in the time zone important to pinking usually, and this time zone is determined by the one or more measurement windows in the internal combustion engine circulation.Solid-borne noise signal and reference level are analyzed in pinking is regulated to be used to discern pinking.
Modern Internal-Combustion Engine can be with the operation of pluralities of fuel kind, and wherein, operation that is to say the control of internal-combustion engine, adapts to fuel type at that time.If fuel type is conversion during internal combustion engine operation, this causes the internal combustion engine noise characteristic to change fast so.Although measurement window carries out unexpected conversion usually, the position of measurement window is the notable change owing to the time of ignition difference when conversion, but reference level only can lingeringly adapt to fast-changing noise characteristic, because reference level is by integration or average and try to achieve, in order to discern pinking, current solid-borne noise signal is associated with reference level.Sometimes make a mistake thus and discern pinking or can not discern pinking.
Additionally, and then tendency to detonate enlarges markedly after the operating mode conversion, for example when being transformed into the gasoline operation from rock gas operation (CNG:Compressed Natural Gas).Between operating mode, suppose that directly the tendency to detonate after operation from the Natural Gas Conversion to gasoline does not have different with the operating tendency to detonate of pure gasoline during instantaneous conversion.Yet in fact the short time after conversion can be determined the severe knock incident that should avoid.
Therefore, task of the present invention is, a kind of method and a kind of device are provided, and can avoid nonrecognition or wrong identification pinking incident when changing by them between the internal combustion engine operation pattern.
Summary of the invention
This task is passed through according to the method for claim 1 and by the device solves according to claim arranged side by side.
According to an aspect, stipulate a kind of method that is used to judge the pinking incident during the transfer process between the internal combustion engine operation pattern.This method comprises the following steps:
The variation of the acoustic signal of-detection internal-combustion engine;
-change to determine the reference level of acoustic signal according to this of acoustic signal, this reference level is equivalent to the data of motor background noise; And
-judge the pinking incident according to this reference level.
And the transfer process between the internal combustion engine operation pattern, for example that is to say and whether just carry out the reference level that transfer process comes to determine acoustic signal relatively.
In order to discern pinking, derive reference level by the solid-borne noise signal of the engine cylinder-body of internal-combustion engine, this reference level is represented the data of motor background noise.Make acoustic signal and this reference level of the instantaneous detection of sonic transducer produce relation and discern pinking thus.When the internal combustion engine operation mode switch, the motor background noise often takes place to be changed fast, making must correspondingly adaptive reference level.
In the common method that is used for trying to achieve reference level, reference level only changes when operating mode is changed usually lentamente, so the reference level noise characteristic of adaptive variation gradually only.Current acoustic signal then departs from reference level largely in transfer process, thus possible errors recognize non-existent pinking or can not discern the pinking of existence.Therefore be provided with, in transfer process, make reference level than adaptive quickly instant engine background noise during a kind of operating mode of internal-combustion engine.
In addition, can determine the pinking incident according to threshold value, wherein, this threshold value during the transfer process between the operating mode by adaptive.By this way can be between operating mode the transition period improve or reduce the sensitivity of identification pinking, operating mode especially changes relevant with the noise of internal-combustion engine.
Especially can with the reference level of acoustic signal during determining section conversion time relatively less than the variation during second time cycle in the cycle very first time, wherein, the variation during the cycle very first time of reference level outside section conversion time and acoustic signal is determined relatively.That is to say that reference level is for example by the formation of averaging on the cycle very first time during before or after the transfer process, and the reference level during the transfer process is averaged on second short cycle.
According to another form of implementation, reference level is tried to achieve as the level mean value of the acoustic signal in the related time cycle or as the integral value of the variation of measured acoustic signal in the related time cycle.
In addition, in order to determine the reference level of acoustic signal, the variation of reference level is low pass filtering by the data according to filter time constant, wherein, the data of filter time constant show the time constant of lower pass-filter, wherein, the lower pass-filter time constant during section conversion time is selected must be less than the lower pass-filter time constant outside the conversion time section.
The operating mode of internal-combustion engine can be respectively corresponding to internal-combustion engine with the operation of different fuel kind, wherein, conversion time section begin be equivalent to one by the moment of leaving the decision of first operating mode.Internal-combustion engine moves the common control that requires to adjust internal-combustion engine with the different fuel kind, makes to begin or just appearance variation in the motor background noise after transfer process begins just from the conversion process.
Transfer process especially can be provided with mixed running, in mixed running, internal-combustion engine moves with two kinds of fuel types, wherein, conversion time section beginning corresponding to one constantly, the moment when this moment reaches predetermined internal combustion engine operation share corresponding to the moment of leaving first operating mode or corresponding to first operating mode.
The endurance of section conversion time can be predetermined regularly or depend on and reach second operating mode fully.
The can regulate firing angle is leading during the conversion time section so that current, be that the time of ignition that operation of combustion engine is set is postponed, wherein, firing angle is cancelled certain endurance after in advance continuously or little by little.By postponing ignition angle, the probability that during transfer process and and then occurs the pinking incident after the transfer process significantly reduces.
In addition, firing angle can be regulated according to engine temperature and/or intake air temperature in advance.
In order only to check the time zone of overstating and wanting for the appearance of pinking incident, can stipulate, only during some time windows, detect the variation of acoustic signal, during these time windows, in internal-combustion engine the pinking incident may appear.
According on the other hand, be provided with the device of the pinking incident that is used for judging transfer process between the internal combustion engine operation pattern.This device comprises:
-be used for detecting the sound detection unit that the acoustic signal of internal-combustion engine changes;
-pinking recognition unit, this pinking recognition unit is configured to
The variation of-detection acoustic signal;
-determine the reference level of acoustic signal according to the variation of acoustic signal, this reference level is equivalent to the data of internal-combustion engine background noise; And
-judge the pinking incident according to this reference level,
Its characteristics are, this pinking recognition unit be configured to and the internal combustion engine operation pattern between transfer process determine the reference level of acoustic signal relatively.
According to being provided with an engine system on the other hand, this engine system comprises internal-combustion engine and said apparatus.
According to being provided with a computer program on the other hand, this computer program comprises program-code, and when this program-code was carried out on data processing unit, this program-code was carried out said method.
Description of drawings
Explain preferred implementation of the present invention below with reference to the accompanying drawings in detail.Accompanying drawing illustrates:
Fig. 1 has the explanatory view of the engine system of pinking recognition device,
The detailed view of the pinking recognition unit of the engine system of Fig. 2 Fig. 1,
Fig. 3 a to 3c is used to describe that firing angle is leading, the variation of the reference level that the is used for pinking identification signal of operating mode signal-time line chart in other words.
Embodiment
Fig. 1 illustrates engine system 1, has internal-combustion engine 2, controlled unit 3 controls of this internal-combustion engine.Control unit 3 for example be comprised in traditional engine controller and may command all or some be the required function of operation of combustion engine 2.
Internal-combustion engine 2 is configured to different fuel types for example rock gas (CNG) or gasoline driven, and wherein, control unit of engine 3 can automatically or manually (that is to say the given ground by the driver) and regulate operating mode.This control unit 3 is by engine control signal MS controlling combustion engine 2, and these engine control signals for example can be stipulated throttle position, emitted dose (for example by regulating the opening and closing moment of injection valve), time of ignition or the like.
Be provided with a pinking recognition unit 4 in addition, this pinking recognition unit can from be placed on the internal-combustion engine 2, for example the sonic transducer 5 on the engine cylinder-body of this internal-combustion engine for example obtains the acoustic signal SS that provides with the electric parameter form and derives thus, and whether pinking takes place in internal-combustion engine 2.The appearance of pinking is indicated to control unit 3 with the form of detonation signal KS.
In operating mode conversion (transfer process) (this is by control unit 3 decisions or predetermined by an external signal), control unit 3 provides a switching signal US to pinking recognition unit 4, makes pinking recognition unit 4 to discern and when carries out the operating mode conversion.
The mode of determining reference level rkr is, acoustic signal was averaged or integration on a time period of determining, wherein, only consider such time window that is used for measuring (measurement window): estimate to take place pinking at these time windows, that is to say, only in these time windows to the acoustic signal analysis evaluation: air-fuel mixture is in the cylinder during these time windows, and this air-fuel mixture may cause knock noise (detonation) because self ignition is burnt.Average or integration is generally carrying out on a plurality of such time windows during one or more work cycle of internal-combustion engine 2.
The motor background noise that the mean value of acoustic signal is equivalent to suppose, this motor background noise can change according to the running state of internal-combustion engine 2.Usually change only relatively slowly, make and during a time period, average that what reference level rkr can adaptive motor background noise in this time period may change with a kind of fuel type run duration motor background noise.Usually average by an integrator or a low-pass filter, the low-pass characteristic of this low-pass filter for example can be regulated by low pass factor TPF.Reference level rkr can be in a computing cycle by instantaneous acoustic signal ikr with discrete following the trying to achieve of mode:
rkr(k+1)＝ikr(k+1)·TPF+rkr(k)·(1-TPF)，
Wherein, the numbering of k indication cycle.The time constant of low-pass filter is predetermined and roughly be equivalent to cycle time divided by the lower pass-filter factor by cycle time.
The above-mentioned calculating that is used to try to achieve reference level rkr is implemented continuously, makes reference level rkr adapt to the variation of acoustic signal usually.Thus, reference level reflects current motor background noise all the time.
When changing between the internal combustion engine operation pattern, the tendency to detonate of internal-combustion engine can significantly increase.Especially when being transformed into the gasoline operation from rock gas operation, be this situation.In addition, the motor background noise relatively suddenly changes when conversion, makes that reference level only little by little reflects the motor background noise that changes when being the basis with above mentioned lower pass-filter factor or low-frequency filter characteristics.Therefore this situation may occur in the transition stage between operating mode: reference level rkr and current acoustic signal SS may depart from significantly mutually, thus, non-existent pinking incident may be identified as pinking mistakenly, and perhaps pinking incident is not identified mistakenly.
Therefore, if the conversion between the operating mode, pinking recognition unit 4 changes the low pass factor TPF that is used to calculate reference level.In other words, reference level rkr is in the acoustic signal (motor background noise) of following the tracks of variation apace by the transition period shown in the switching signal US, between the operating mode.This is by raising lower pass-filter factor TPF or by realizations such as change time constants.Lower pass-filter factor TPF can change based on switching signal US in pinking recognition unit 4, and perhaps corresponding lower pass-filter factor can offer pinking recognition unit 4 by control unit 3.
The skeleton diagram that is used for being implemented in the pinking event recognition that pinking recognition unit 4 carries out shown in Figure 2.Previously described reference level calculates and carries out according to lower pass-filter factor TPF by first multiplication unit 13, sum unit 14 and second multiplication unit 11.The value of acoustic signal ikr in first multiplication unit 13, multiply each other with lower pass-filter factor TPF and its result subsequently in sum unit 14 with the reference level rkr that calculates recently in second multiplication unit 11 with the value addition of (1-TPF) multiplying each other so that obtain the reference level rkr of real time implementation.
The reference level rkr and the current acoustic signal ikr that calculate are transfused to threshold value comparison module 12.
Threshold value comparison module 12 obtains a threshold value SW, and this threshold value can be by predetermined or for example regulated changeably by control unit 3 relatively with the method for operation of internal-combustion engine 2 regularly.If it is excessive that difference between current acoustic signal ikr (current noise) and the reference level rkr (motor background noise) or ratio depart from mutually, that is to say that the result surpasses threshold value SW, then pinking incident is identified, and this illustrates by detonation signal KS.Substitute difference or ratio, also can use other relations between reference level and the current acoustic signal.
Especially the threshold value SW during the transfer process between can adaptive operating mode, for example can improve this threshold value SW, if be converted to the second noisy operating mode of internal-combustion engine 2 from more quiet first operating mode of internal-combustion engine, the threshold value SW that adopts during threshold value SW and first operating mode compares raising, and vice versa.
Fast reference level has followed the tracks of endurance of starting can be by predetermined or relevant regularly with the direction of the type of operating mode conversion, operating mode conversion just (running to that gasoline moves or on the contrary) from CNG.Being used to activate the translation duration that quick reference level follows the tracks of especially can select like this: make the motor background noise of guaranteeing the reference level reflection variation that reached after transfer process finishes.For example can be provided with for this reason, realize gasoline operating mode (second operating mode) fully afterwards, translation duration finished after predetermined endurance.
In addition, as long as leave rock gas operating mode (first operating mode), total perhaps when natural fate row mode internal-combustion engine 2 operation on shared share when being lower than definite threshold value, can begin quick reference level and follow the tracks of.
Also the can regulate firing angle is leading in the transition period, and this firing angle is used to postpone firing angle in advance, thereby can avoid the pinking incident during the mixed running.Firing angle is equivalent to an Offset in advance, and this Offset is applied to the firing angle that calculates.This has significantly reduced tendency to detonate.Therefore, can additionally guarantee carrying out smoothly of operating mode conversion.
Additionally there is this possibility: firing angle leading and engine temperature and intake air temperature initialization relatively.
Signal-time the line chart of the change curve when being used to shown in Fig. 3 a to 3c describe the leading ZV of firing angle in the operating mode conversion that runs to the gasoline operation from rock gas.
At first make pure CNG operational failure when conversion, this is by indicating from high level to low level transition by operating mode signal B_cng.After stage, pure gasoline operation is started at mixed running, and this indicates (referring to Fig. 3 c) in an identical manner by operating mode signal B_bz.
In the mixed running MB stage, that is to say that not only B_cng but also B_bz are in low level, regulate igniting angular advance ZV by the time of ignition ZZP that postpones with crank shaft angle ° (degree) expression, and, perhaps directly finishing (B_bz is to high level) leading ZV of firing angle afterwards or after regular hour t_del at mixed running continuously or travelling backwards step by step makes and moves with the firing angle for selected operating mode optimum at the firing angle back internal-combustion engine 2 that resets in advance.Consequent slope can that is to say the running state of motor according to the Operational Limits of its slope and adaptive motor of endurance.
The reference level rkr that the line chart of Fig. 3 b illustrates during the mixed running follows the tracks of.Change curve K1 for example illustrates reference level tracking fast, and the reference level that the routine that change curve K2 illustrates not to be had under the low-pass characteristic situation of change is carried out changes.
Claims (14)
1. be used to judge the method for the pinking incident during the transfer process between internal-combustion engine (2) operating mode, have the following step:
The variation of the acoustic signal (ikr) of-detection internal-combustion engine (2);
-determine the reference level (rkr) of this acoustic signal according to the variation of this acoustic signal (ikr), this reference level is equivalent to the data of motor background noise; And
-judge the pinking incident according to this reference level (rkr);
It is characterized in that,
And the transfer process between internal-combustion engine (2) operating mode is determined the described reference level (rkr) of described acoustic signal relatively.
2. according to the process of claim 1 wherein, carry out the judgement of pinking incident relatively with threshold value (SW), wherein, adaptive this threshold value (SW) during the transfer process between the operating mode.
3. according to the method for claim 1 or 2, wherein, reference level (rkr) during the conversion time section is being determined less than the variation during second time cycle in the cycle very first time relatively with acoustic signal, wherein, the reference level outside section conversion time (rkr) is determined relatively with the variation of acoustic signal (ikr) during the cycle very first time.
4. according to the method for claim 3, wherein, described reference level is tried to achieve as the mean value of the level of acoustic signal in the related time cycle or as the integral value of the variation of acoustic signal (ikr) in the related time cycle that is detected.
5. according to the method for claim 3, wherein, in order to determine the reference level (rkr) of acoustic signal, the variation of this reference level (rkr) is carried out lower pass-filter according to the data of a filter time constant (TPF), wherein, the data of this filter time constant (TPF) reflect the time constant of this lower pass-filter, and wherein, the time constant of lower pass-filter is selected during the conversion time section must be than little outside the conversion time section.
6. according to the method for one of claim 3 to 5, wherein, the operation that the operating mode of internal-combustion engine (2) is carried out with the different fuel kind corresponding to internal-combustion engine (2) respectively, wherein, conversion time section begin to be equivalent to a moment relevant with leaving first operating mode.
7. according to the method for claim 6, wherein, described transfer process is provided with mixed running, in mixed running, internal-combustion engine (2) moves with two kinds of fuel types, wherein, conversion time section begin to be equivalent to a moment, this is equivalent to leave the moment of first operating mode constantly or is equivalent to first operating mode in internal-combustion engine (2) is in service when accounting for predetermined share moment.
8. according to the method for claim 6 or 7, wherein, described conversion time, section had the endurance, and this endurance is predetermined regularly or depends on and reach second operating mode fully.
9. according to the method for one of claim 3 to 8, wherein, during the conversion time section, regulate the igniting angular advance, so as with current, be the time of ignition postponement that operation of combustion engine (2) is set, wherein, this firing angle is eliminated after certain endurance finishes in advance continuously or little by little.
10. according to the method for claim 9, wherein, leading and internal-combustion engine (2) temperature of described firing angle and/or intake air temperature are regulated relatively.
11. according to the method for one of claim 1 to 10, wherein, only during some time windows, detect the variation of acoustic signal, in internal-combustion engine (2), the pinking incident may occur during these time windows.
12. be used to judge the device of the pinking incident during the transfer process between internal-combustion engine (2) operating mode, comprise:
-be used for detecting the sound detection unit (5) that the acoustic signal (ikr) of internal-combustion engine (2) changes;
-pinking recognition unit (4), this pinking recognition unit is configured,
-be used to detect the variation of acoustic signal;
-being used for determining the reference level (rkr) of this acoustic signal (ikr) according to the variation of this acoustic signal (ikr), this reference level is equivalent to the data of internal-combustion engine background noise; And
-be used for judging the pinking incident according to this reference level (rkr),
It is characterized in that,
Described pinking recognition unit (4) be configured to and the operating mode of internal-combustion engine (2) between transfer process determine the reference level (rkr) of this acoustic signal relatively.
13. engine system, this engine system comprises:
-internal-combustion engine (2); With
-according to the device of claim 12.
14. computer program, this computer program comprises program-code, and when this program-code was carried out on data processing unit, this program-code was carried out the method according to one of claim 1 to 11.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1020080424757 | 2008-09-30 | ||
| DE102008042475.7 | 2008-09-30 | ||
| DE102008042475.7A DE102008042475B4 (en) | 2008-09-30 | 2008-09-30 | Method and device for determining a knocking event during a switching operation between operating modes of an internal combustion engine |
| PCT/EP2009/060434 WO2010037588A1 (en) | 2008-09-30 | 2009-08-12 | Method and device for detecting a knocking occurrence during a switching process between operating modes of an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102171428A true CN102171428A (en) | 2011-08-31 |
| CN102171428B CN102171428B (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980138731XA Active CN102171428B (en) | 2008-09-30 | 2009-08-12 | Method and device for detecting knocking occurrence during switching process between operating modes of internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN102171428B (en) |
| DE (1) | DE102008042475B4 (en) |
| RU (1) | RU2528780C2 (en) |
| WO (1) | WO2010037588A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795399A (en) * | 2016-09-01 | 2018-03-13 | 罗伯特·博世有限公司 | Method for distinguishing is known in pinking for internal combustion engine |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012207733B4 (en) | 2012-05-09 | 2024-05-02 | Robert Bosch Gmbh | Method and device for detecting knocking of an internal combustion engine |
| DE102013019738B3 (en) * | 2013-11-27 | 2015-04-02 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Method for operating an internal combustion engine |
| DE102014224800B4 (en) * | 2014-12-03 | 2018-01-18 | Robert Bosch Gmbh | Method and device for knock control of an internal combustion engine |
| JP6264325B2 (en) * | 2015-06-05 | 2018-01-24 | トヨタ自動車株式会社 | Control device for internal combustion engine |
| DE102017201801B4 (en) | 2017-02-06 | 2019-09-05 | Robert Bosch Gmbh | Method and device for controlling a combustion of an internal combustion engine |
| DE102020128281A1 (en) | 2020-10-28 | 2022-04-28 | Bayerische Motoren Werke Aktiengesellschaft | Method for robust knock detection in an internal combustion engine, control unit and motor vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3121120A1 (en) * | 1981-04-15 | 1982-11-04 | Robert Bosch Gmbh, 7000 Stuttgart | METHOD AND DEVICE FOR DETECTING IRREGULAR COMBUSTION PROCESSES IN AN INTERNAL COMBUSTION ENGINE |
| US6202601B1 (en) * | 2000-02-11 | 2001-03-20 | Westport Research Inc. | Method and apparatus for dual fuel injection into an internal combustion engine |
| CN1322295A (en) * | 1999-09-28 | 2001-11-14 | 罗伯特·博施有限公司 | Method for detecting knocking |
| US20070125321A1 (en) * | 2004-03-10 | 2007-06-07 | Ritter Gregory W | Process for use with dual-fuel systems |
| CN101235783A (en) * | 2007-12-20 | 2008-08-06 | 华夏龙晖（北京）汽车电子科技有限公司 | Knock controlling device and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4976241A (en) | 1988-10-13 | 1990-12-11 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Method for determining combustion condition in spark ignition internal combustion engine and combustion condition control device |
| DE4332711A1 (en) * | 1993-09-25 | 1995-03-30 | Bosch Gmbh Robert | Device for fault detection in a device for knock detection |
| DE19902209A1 (en) * | 1999-01-21 | 2000-07-27 | Bosch Gmbh Robert | Combustion knock prevention device for operation of internal combustion, uses dynamic phase based correction |
-
2008
- 2008-09-30 DE DE102008042475.7A patent/DE102008042475B4/en active Active
-
2009
- 2009-08-12 CN CN200980138731XA patent/CN102171428B/en active Active
- 2009-08-12 WO PCT/EP2009/060434 patent/WO2010037588A1/en active Application Filing
- 2009-08-12 RU RU2011116932/06A patent/RU2528780C2/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3121120A1 (en) * | 1981-04-15 | 1982-11-04 | Robert Bosch Gmbh, 7000 Stuttgart | METHOD AND DEVICE FOR DETECTING IRREGULAR COMBUSTION PROCESSES IN AN INTERNAL COMBUSTION ENGINE |
| CN1322295A (en) * | 1999-09-28 | 2001-11-14 | 罗伯特·博施有限公司 | Method for detecting knocking |
| US6202601B1 (en) * | 2000-02-11 | 2001-03-20 | Westport Research Inc. | Method and apparatus for dual fuel injection into an internal combustion engine |
| US20070125321A1 (en) * | 2004-03-10 | 2007-06-07 | Ritter Gregory W | Process for use with dual-fuel systems |
| CN101235783A (en) * | 2007-12-20 | 2008-08-06 | 华夏龙晖（北京）汽车电子科技有限公司 | Knock controlling device and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795399A (en) * | 2016-09-01 | 2018-03-13 | 罗伯特·博世有限公司 | Method for distinguishing is known in pinking for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010037588A1 (en) | 2010-04-08 |
| CN102171428B (en) | 2013-10-23 |
| RU2011116932A (en) | 2012-11-10 |
| RU2528780C2 (en) | 2014-09-20 |
| DE102008042475B4 (en) | 2019-10-24 |
| DE102008042475A1 (en) | 2010-04-01 |
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