EP1583944A1 - Procede et dispositif de detection de cliquetis - Google Patents

Procede et dispositif de detection de cliquetis

Info

Publication number
EP1583944A1
EP1583944A1 EP03773494A EP03773494A EP1583944A1 EP 1583944 A1 EP1583944 A1 EP 1583944A1 EP 03773494 A EP03773494 A EP 03773494A EP 03773494 A EP03773494 A EP 03773494A EP 1583944 A1 EP1583944 A1 EP 1583944A1
Authority
EP
European Patent Office
Prior art keywords
combustion
knocking
windows
knock
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03773494A
Other languages
German (de)
English (en)
Inventor
Juergen Sauler
Carsten Kluth
Heiko Ridderbusch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1583944A1 publication Critical patent/EP1583944A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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

Definitions

  • DE 4027354 already discloses a method and a device for knock detection in which a measurement signal from a knock sensor is examined in a measurement window during a combustion process in a cylinder of an internal combustion engine. The investigation is carried out to determine whether the combustion was knocking or not.
  • Knocking combustion in the cylinder of an internal combustion engine denotes an uncontrolled combustion process, in particular a combustion process in which there is no controlled ignition of the combustion mixture by an ignition spark, but self-ignition. With such knocking combustion, impermissibly high pressures or temperatures occur in individual parts of the combustion chamber and there is a risk of damage to the internal combustion engine. Sense and purpose of a
  • the internal combustion engine is therefore to be operated in an operating range in which knocking burns are avoided.
  • operation as close as possible to this area of knocking combustion is desirable since the combustion process is particularly economical and clean there.
  • the method according to the invention and the device according to the invention for knock detection with the feature of the independent claims have the compared to the advantage that the accuracy of knock detection is improved. In particular, this enables individual events that occur during the combustion process not to be incorrectly evaluated as a knock signal. This is particularly advantageous in the case of direct-injection gasoline engines, since valves and the like are actuated there during the combustion process, and as a result disturbing noises are generated which impair knock detection.
  • the method according to the invention is also particularly advantageous if the cylinder of the brake engine is operated with a piston which has a high center of gravity (top-heavy piston). In the case of pistons of this type, a tilting movement occurs in the area of the top dead center, which likewise leads to disturbing noises.
  • a particularly safe decision regarding the existence of knocking or non-knocking combustion can be made if 3 windows are examined, of which the combustion must be recognized as knocking in at least 2 windows.
  • the temporal width of the windows can be fixed or can be variable. In the variable configuration, it is particularly advantageous to provide a speed dependency in order to take into account the larger changes in combustion at high speeds. Furthermore, gaps between the windows can also be provided, in particular if an interference signal occurs at a location that is predictable in time.
  • FIG. 1 shows the course of a measurement signal
  • Figure 2 schematically shows a device for knock detection.
  • knock sensors are designed, for example, as structure-borne noise sensors, i.e. as acceleration sensors that are attached to the engine block.
  • the pressure peaks in the combustion chambers generate sound waves in the engine block, which are detected by these acceleration sensors.
  • Knock sensors are also known which derive a pressure signal directly from the combustion chamber.
  • FIG. 1 shows a signal from a knock sensor, for example one
  • FIG. 1 shows the intensity of the measurement signal over time.
  • the knock signal presents itself as an irregular oscillation, with its intensity decreasing with increasing time.
  • a knocking signal is shown in FIG. 1, ie the intensity fluctuations are relatively high. With a non-knocking signal, the intensity fluctuations would be significantly smaller.
  • time windows 11, 12, 13 are entered in FIG. 1, each of which represents a measurement window in itself.
  • the knock signal is examined to determine whether knocking combustion is involved or not.
  • the signal curve shown in FIG. 1 represents the knock signal of an individual combustion process.
  • a predetermined time measurement window is usually specified.
  • the measurement windows 11, 12, 13 shown are usually considered together to form an overall signal. This overall signal is used to judge whether the combustion was knocking or not.
  • the length of this total area is usually dimensioned as long as it makes sense
  • Knock signal is detectable. According to the invention, it is now proposed to further subdivide the useful measuring range, in particular into several windows 11, 12, 13. Within each of these individual windows 11, 12, 13, it is then determined separately whether knocking combustion has occurred or not. By comparing the results found in this way, an end result is then formed which contains a statement as to whether knocking combustion has occurred or not. If, as in FIG. 1, three windows 11, 12, 13 are provided for the measurement, it is advantageous to determine a knocking event only if knocking combustion has been detected in at least 2 of the 3 windows 11, 12, 13. Knock detection can be improved in this way. In particular, individual strong
  • Signals that only appear in one of the windows 11, 12, 13 are rejected as implausible.
  • Such individual signals can occur in that additional events take place in the internal combustion engine.
  • Such an event can be, for example, the closing of an injection valve in a direct injection internal combustion engine.
  • tilting movements can occur in the case of top-heavy pistons near the top dead center, which can also lead to a single strong impulse of the knock signal during the combustion signal.
  • Such a single event only has an effect at a single point in time during the course of the combustion, ie a corresponding signal only occurs in a single window.
  • the intensity however, these signals can be very high, so that a knock signal would be erroneously concluded when looking at all three windows.
  • FIG. 2 shows an example of a device for processing knock signals.
  • the device for processing knock signals 1 has several inputs, to each of which the signals from several knock sensors 2 are fed.
  • This plurality of knock sensors 2 may be structure-borne noise sensors, for example, which are designed as piezoelectric acceleration sensors.
  • the knock sensors 2 are assigned to different cylinders and attached to the engine block at locations where they can receive the signals of the cylinders in question.
  • An arrangement as in FIG. 2 with two knock sensors 2 is, for example, well suited for the measurement of knock signals on a four-cylinder engine. Since the burns do not take place at the same time but one after the other, the signals of the individual knock sensors can be processed one after the other by the device for knock detection 1. For this purpose, the signals from the knock sensors 2
  • Knock detection device 1 supplied. By means of a multiplexer 3, these signals present at the inputs are correspondingly tapped from the inputs assigned to the different knock sensors 2.
  • An amplification stage 4 is arranged after the multiplexer 3, in which the knock signals are amplified.
  • a filter 5 is arranged downstream of the amplification stage 4. The filter 5 is designed as a bandpass filter, since knock signals only occur in a certain frequency range.
  • the output signal of the filter 5 is fed to a rectifier 6, in which the signals are rectified. This rectifier is required because the knock signals can have both signs and only the absolute intensity is of interest.
  • Downstream of the rectifier 6 is an integrator 7, in which the rectified signals are integrated over a predetermined period of time. The signal integrated in this way is a measure of the knock intensity and is output by the device for knock detection. In another unit, for example on the control unit, which is not shown here, this integrated value for the knock intensity is then compared with a reference value.
  • the integration in the integrator 7 usually takes place over the entire period, ie for each combustion process the entire period in which knock signals can occur is considered.
  • the integrator 7 is now controlled such that instead of an integrated signal over the entire period 3 different signals in succession, each of which corresponds to an integration in the windows 11, 12 and 13. These are then compared individually with reference values and the comparison with the reference value determines whether or not there is a knocking combustion process in the window 11, 12, 13 in question.
  • the reference values with which the integrated signals for the individual windows 11, 12, 13 are compared can be designed differently and in particular differ in their level. 3 signals are thus generated, each of which represents a measure of the knock intensity and which are evaluated in each case to determine whether knocking is present or not.
  • Knock signal in one of the windows 11, 12, 13, are reliably recognized as signal components that are not based on knocking. It is typical for knocking burns that knocking is detected in all 3 windows.
  • Periods are defined. These periods can be fixed, i.e. the signal is integrated for predetermined periods 11, 12, 13. This has the advantage that it is particularly simple.
  • the time length of these windows 11, 12, 13 can, however, also be of variable design, in particular it is also possible to design the time length of these measurement windows as a function of the speed. This would be especially true for higher
  • the windows 11, 12, 13 can not as periods, but as
  • Crankshaft angles can be defined. This means that in FIG. 1 axis A would not be a time axis but a crankshaft angle axis. In this case, however, it would not be necessary to shorten the windows as a function of an increasing speed, since this is already taken into account as areas of the crankshaft by the definition of the windows 11, 12, 13.
  • the temporal length of the windows 11, 12, 13 is shown the same size. If it is necessary and sensible, the temporal lengths of these measurement windows can also be designed differently. In particular, the window 13, which is long after the start of combustion, in which the signal intensities already exist has dropped significantly, could be longer to achieve a larger measurement signal.
  • Engine control unit the internal combustion engine is operated in an area where knocking is not actually expected. In such a case, it could then be concluded that this is a signal that has no cause in the knock. Further measurements could then be used to determine where this signal always occurs and the measurement windows 11, 12, 13 could be placed in such a way that measurements are not carried out at the times when the faulty signal always occurs. Gaps in the measuring range could also be provided, i.e. for example, a time range is provided between window 11 and 12 in which no attempt is made to measure a knock signal. This measure can be used to suppress regularly occurring noise, such as opening or closing an injection valve, for the purpose of determining knocking in the internal combustion engine.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Testing Of Engines (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un procédé et un dispositif de détection de cliquetis. Selon l'invention, lors de combustion dans un cylindre d'un moteur à combustion interne, un signal de mesure d'un détecteur de cliquetis (2) est évalué pour permettre de déterminer si un phénomène de cliquetis s'est produit ou non lors de la combustion. Ledit signal de mesure est divisé en plusieurs fenêtres (11, 12, 13), chaque fenêtre étant analysée pour permettre de déterminer si un phénomène de cliquetis s'est produit ou non lors de la combustion. Les résultats des fenêtres (11, 12, 13) sont comparés les uns aux autres pour permettre d'obtenir une évaluation définitive concernant le cliquetis.
EP03773494A 2003-01-08 2003-10-06 Procede et dispositif de detection de cliquetis Withdrawn EP1583944A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10300204 2003-01-08
DE10300204A DE10300204A1 (de) 2003-01-08 2003-01-08 Verfahren und Vorrichtung zur Klopferkennung
PCT/DE2003/003299 WO2004063694A1 (fr) 2003-01-08 2003-10-06 Procede et dispositif de detection de cliquetis

Publications (1)

Publication Number Publication Date
EP1583944A1 true EP1583944A1 (fr) 2005-10-12

Family

ID=32519654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03773494A Withdrawn EP1583944A1 (fr) 2003-01-08 2003-10-06 Procede et dispositif de detection de cliquetis

Country Status (5)

Country Link
US (1) US7295916B2 (fr)
EP (1) EP1583944A1 (fr)
JP (1) JP2006513412A (fr)
DE (1) DE10300204A1 (fr)
WO (1) WO2004063694A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7472687B2 (en) * 2002-11-01 2009-01-06 Visteon Global Technologies, Inc. System and method for pre-processing ionization signal to include enhanced knock information
DE10323039A1 (de) * 2003-05-20 2004-12-23 Samson Ag Verfahren und Vorrichtung zum Vermeiden eines kritischen Betriebszustands eines Stellgeräts
JP4311657B2 (ja) * 2004-04-15 2009-08-12 株式会社デンソー 内燃機関のノック検出装置
JP2006177259A (ja) 2004-12-22 2006-07-06 Toyota Motor Corp 内燃機関のノッキング判定装置
GB0705026D0 (en) * 2007-03-15 2007-04-25 Delphi Tech Inc Vehicle diagnosis system and method
DE102007036277A1 (de) 2007-07-31 2009-02-05 Technische Universität Berlin Verfahren und Vorrichtung zur automatischen Mustererkennung
DE102007050618B3 (de) * 2007-10-23 2009-04-23 Continental Automotive Gmbh Verfahren und Vorrichtung zum Steuern einer Brennkraftmaschine
CA2610388C (fr) * 2007-11-29 2009-09-15 Westport Power Inc. Methode et dispositif permettant d'utiliser un signal d'accelerometre pour detecter un rate dans un moteur a combustion interne
DE102008011614B4 (de) 2008-02-28 2011-06-01 Continental Automotive Gmbh Vorrichtung zur Verarbeitung eines Klopfsensorsignals
US9959738B2 (en) * 2013-04-08 2018-05-01 Centega Services, Llc Reciprocating machinery monitoring system and method
DE102013221993A1 (de) * 2013-10-29 2015-04-30 Robert Bosch Gmbh Verfahren und Vorrichtung zur Erkennung eines Klopfens einer Brennkraftmaschine, vorzugsweise eines Benzinmotors
JP6312618B2 (ja) * 2015-03-13 2018-04-18 日立オートモティブシステムズ株式会社 内燃機関の制御装置及び異常燃焼検出方法
US20170184043A1 (en) * 2015-12-29 2017-06-29 General Electric Company System and method to verify installation of asymmetric piston
US10961942B2 (en) 2016-08-31 2021-03-30 Ai Alpine Us Bidco Inc System and method for determining the timing of an engine event
US9970373B1 (en) 2016-11-18 2018-05-15 Brunswick Corporation Method and system for detecting and eliminating knocking
DE102017220801B4 (de) * 2017-11-21 2019-11-14 Mtu Friedrichshafen Gmbh Verfahren zum Betreiben einer Brennkraftmaschine mit wenigstens einem Brennraum und Brennkraftmaschine zur Durchführung eines solchen Verfahrens
US20220327856A1 (en) * 2021-03-31 2022-10-13 Gordon S. Franza Signal Processing for Segmented Thin-Film Acoustic Imaging Systems for Portable Electronic Devices

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63117170A (ja) * 1986-11-04 1988-05-21 Toyota Motor Corp 内燃機関の点火時期制御装置
JP2910858B2 (ja) * 1989-08-31 1999-06-23 富士重工業株式会社 エンジンのノッキング検出方法
US5230316A (en) * 1990-04-27 1993-07-27 Hitachi, Ltd. Method and apparatus for detecting knock in an internal combustion engine
JP2510767B2 (ja) * 1990-07-06 1996-06-26 株式会社日立製作所 内燃機関のノッキング検出方法とその装置及びこれを利用した内燃機関の点火時期制御装置
JP2692436B2 (ja) * 1991-07-29 1997-12-17 日産自動車株式会社 内燃機関のノッキング検出装置
US6456927B1 (en) * 1993-03-22 2002-09-24 Motorola, Inc. Spectral knock detection method and system therefor
US5535722A (en) * 1994-06-27 1996-07-16 Ford Motor Company Knock detection system and control method for an internal combustion engine
US5537855A (en) * 1994-06-30 1996-07-23 Motorola, Inc. Knock detection method and apparatus with dual integration windows
EP0731349A1 (fr) 1995-03-10 1996-09-11 Motorola, Inc. Méthode et système de détection par spectre de cliquetis
DE19615448A1 (de) * 1996-04-19 1997-11-20 Bosch Gmbh Robert Vorrichtung zur Klopferkennung und Regelung einer Brennkraftmaschine
DE19755255C2 (de) * 1997-12-12 2000-12-21 Telefunken Microelectron Verfahren zur Erkennung von klopfender Verbrennung aus einem Ionenstromsignal bei Brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004063694A1 *

Also Published As

Publication number Publication date
WO2004063694A1 (fr) 2004-07-29
US20060129303A1 (en) 2006-06-15
DE10300204A1 (de) 2004-07-22
US7295916B2 (en) 2007-11-13
JP2006513412A (ja) 2006-04-20

Similar Documents

Publication Publication Date Title
EP1583944A1 (fr) Procede et dispositif de detection de cliquetis
DE19741820B4 (de) Verfahren zur Auswertung des Brennraumdruckverlaufs
DE19518861C2 (de) Vorrichtung zum Feststellen sowie Verfahren zum Steuern des Klopfens bei einem Verbrennungsmotor
EP1698775B1 (fr) Système et méthode pour commander le comportement d'un moteur à combustion interne
DE112007000333B4 (de) Klopferkennungssystem
EP0635122B1 (fr) Procede et dispositif permettant la detection de cliquetis dans un moteur a combustion interne
DE10017749B4 (de) System zur Erfassung von Fehlzündungen in Verbrennungsmotoren
DE4126782C2 (de) Gerät und Verfahren zur Erfassung von Fehlzündungen bei einem Verbrennungsmotor
DE102007056241B4 (de) Klopferfassungsvorrichtung für einen Verbrennungsmotor
DE102013204785A1 (de) Klopfsteuervorrichtung für Innenverbrennungsmotor
EP0076265B1 (fr) Procede et dispositif pour detecter les phenomenes de combustion irreguliers dans un moteur
DE10138110A1 (de) Verfahren zur Klopferkennung bei Brennkraftmaschinen
WO2010121888A1 (fr) Procédé et dispositif permettant de faire fonctionner un moteur à combustion interne
DE102007000354B4 (de) Vorrichtung und Verfahren zum Bestimmen des Klopfens einer Brennkraftmaschine
EP0465614B1 (fr) Procede pour la detection du temps moteur dans le cas d'un moteur a quatre temps
DE19727004A1 (de) Verfahren und Vorrichtung zur Erkennung von Zündaussetzern einer Brennkraftmaschine
DE3933947C1 (en) Combustion pressure determn. method for petrol-diesel engine - using acceleration sensors fitted at crankshaft bearings of engine in cylinder axial direction
DE10154422A1 (de) Verfahren und Vorrichtung zur Störgeräuschausblendung bei der Klopferfassung in einer Brennkraftmaschine
EP0708883A1 (fr) Dispositif pour la detection d'un volume pulse
EP1664508B1 (fr) Procede de quantification d'une preinjection dans le systeme d'injection de carburant d'un moteur a combustion interne et dispositif correspondant
DE102004024375B4 (de) Klopferfassungsvorrichtung und Erfassungsverfahren
DE102018211783B4 (de) Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
DE102010004091A1 (de) Verfahren zum Betrieb einer Verbrennungskraftmaschine
DE10325318B4 (de) Vorrichtung zur Erfassung von Bedingungen bei der Kraftstoffverbrennung in einer Brennkraftmaschine
DE10028885B4 (de) Verfahren und Vorrichtung zum Erfassen des in einem Brennraum einer Brennkraftmaschine auftretenden Brennraumdrucks

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050808

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

RBV Designated contracting states (corrected)

Designated state(s): DE ES FR GB IT

17Q First examination report despatched

Effective date: 20080819

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110503