EP1113170A1 - Verfahren zur Überwachung des Verbrennungsvorgangs bei der Verbrennung fossiler Brennstoffe - Google Patents
Verfahren zur Überwachung des Verbrennungsvorgangs bei der Verbrennung fossiler Brennstoffe Download PDFInfo
- Publication number
- EP1113170A1 EP1113170A1 EP00127161A EP00127161A EP1113170A1 EP 1113170 A1 EP1113170 A1 EP 1113170A1 EP 00127161 A EP00127161 A EP 00127161A EP 00127161 A EP00127161 A EP 00127161A EP 1113170 A1 EP1113170 A1 EP 1113170A1
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- Prior art keywords
- combustion
- sequence
- combustion process
- conductivity values
- values
- 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.)
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Classifications
-
- 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
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/028—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs the glow plug being combined with or used as a sensor
-
- 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
- F02D35/021—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using an ionic current sensor
-
- 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
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/12—Testing characteristics of the spark, ignition voltage or current
Definitions
- the invention relates to a method for monitoring the combustion process in the combustion of fossil fuels, especially in the Combustion of fossil fuels in a cylinder of an internal combustion engine, with the method a sequence of conductivity values during a time-limited combustion process is determined and the Sequence of conductivity values for monitoring the combustion process is evaluated.
- This known method is used in particular in gasoline engines and in diesel engines in order to monitor the course of the individual combustion processes in the cylinder of the internal combustion engine and, if appropriate, to take suitable measures, such as by changing the injection timing, the amount of fuel injected or the course of the injection, to specifically control the further combustion processes influence. Furthermore, the known method is used to keep the temperatures arising during the combustion processes in a desired temperature range at which the increased formation of undesired exhaust gas components such as nitrogen oxides (NO x ) does not occur, the formation of which should be avoided for environmental reasons. It is observed in particular in internal combustion engines that from a temperature of approximately 2000 K, nitrogen oxides are increasingly produced in the cylinder during the combustion processes. After detecting the increased formation of undesired exhaust gas components, the temperature in the cylinder can be reduced using the measures described above.
- NO x nitrogen oxides
- the invention solves the problem by a method with the features according to claim 1 and in particular in that the sequence of conductivity values on the proportion of positively charged particles in the combustion gas based.
- sequence of Conductivity values a conductivity curve in which the signal is compared represented relatively unadulterated with the known methods can be due to interference caused by a disproportionate Increase in certain ions in the combustion gas arise, not detected become.
- the sequence of conductivity values is at least approximately the actual one Immediately reflects the course of the combustion process.
- Sequence of conductivity values the combustion process with high accuracy be evaluated.
- the sequence of determined conductivity values with a sequence to compare stored reference values that have a theoretical course the change in conductivity during an optimal combustion process define its boundary conditions, such as the injection duration, the time of injection or the course of injection, the boundary conditions correspond to the monitored combustion process.
- Around Values are used to enable the most accurate evaluation possible of the two episodes compared, at least approximately identical times in the combustion processes to be compared occur.
- the method of the invention used in internal combustion engines values are combined compared, which occur at identical crankshaft angles.
- the sequence of measured conductivity values from the sequence of stored Reference values can vary depending on the type of deviation different conclusions drawn on the course of the combustion be, so that the subsequent combustion processes accordingly can be influenced.
- sequence of conductivity values with respect to the sequence is stored Reference values towards the end of the combustion process postponed, this is an indication of a lack of oxygen during the to monitor the monitored combustion process.
- the duration can be determined from the signal curve and immediately determine the end of the combustion of the fuel, so that, for example, the effect of a pre-injection during of the combustion process is clear from the signal curve.
- the consequence is of conductivity values during the monitored combustion process released heat determined.
- the heat release determined in this way can be used, for example, to control the combustion with a predetermined heat release are compared.
- the course of the heat release from the sequence of conductivity values determine so that, for example, temperature peaks during the combustion process can be recognized to avoid education of nitrogen oxides in the subsequent combustion process from the Temperature forth can be reduced.
- the method according to the invention is used in particular in an internal combustion engine used, with the combustion processes in each cylinder be monitored. In this way, one is compared to conventional Process more precise control of fuel supply and power output every single cylinder possible.
- each cylinder is compared using a theoretical combustion process define at which the respective cylinder maximum Performs. If the sequence of conductivity values of the concerned cylinders from the sequence of stored reference values the subsequent combustion processes in accordance with a performance maximization readjusted the relevant cylinder.
- the inventive Process used in a diesel engine To measure the conductivity of the combustion gas in the cylinder becomes a Glow plug of the respective cylinder of the diesel engine is used.
- the Glow plug of the respective cylinder is in with a reference resistance Series connected and conductively connected to the inner wall of the cylinder.
- Particles To determine the conductivity of the combustion gas in each Cylinder based on the positively charged contained in the combustion gas Particles are attached to the glow plug during part of the compression stroke and a part of the working stroke applied a negative voltage. Due to the positive arising during the combustion process charged particles changes the conductivity of the combustion gas between the glow plug and the inner wall of the cylinder, causing the voltage drop across the reference resistor changes, which is measured and is strengthened for evaluation.
- a measurement signal curve 10 is shown in FIGS. 1 and 2 as an example shown the change in conductivity values related to the crank shaft angle shows, where the conductivity values on the proportion of positive charged particles in the combustion gas.
- FIG. 1 and 2 The course of FIG. 1 and 2 is described below with reference to FIGS Measuring signal curve 10 explained in more detail.
- a crankshaft angle of approximately 40 ° before top dead center TDC of the piston shows the measurement signal curves 10 a value of approximately 0.4 volts.
- From a crankshaft angle of approximately 20 ° before top dead center TDC of the piston begins the engine control of the diesel engine a pre-injection with a small amount of diesel fuel in the Cylinder is injected to the inside of the cylinder before the actual one Main injection to warm up. This can be seen in the measurement curve 10 due to the small signal fluctuations 12 in the signal curve.
- the negative measurement signal curve 10 rises to a value of approximately 2.6 Volts, as shown by the second signal peak 16. Then falls the measurement signal curve 10 with the formation of a third signal peak 18 Value of approximately 1.6 volts at a crankshaft angle of approximately -15 ° with respect to the top dead center of the piston until it hits one Crankshaft angle of approximately -40 ° related to top dead center TDC of the piston also reached at least approximately 0.4 volts.
- the heat release curve 20 starts with a level of around 0 joules per second and also shows at a crankshaft angle of about 14 ° in front of the upper one Dead center OT a first signal peak 22, which is at about 1.1 joules per second has its maximum.
- the location of the first peak 22 of the Heat release curve 20 corresponds exactly to the position of the first signal peak 14 of the measurement signal curve 10.
- the heat release curve 20 falls in same way as the measurement signal curve 10 to a minimum of 0 joules per second and then rises to form a second signal peak 24 at a crankshaft angle of approximately -2 ° after top dead center TDC of the piston to a maximum, forming a second signal peak 24 Value of about 1.7 joules per second. After the second signal peak 24, the heat release curve 20 falls off gently, the course the heat release curve 20 to the course of the measurement signal curve 10 after the third signal peak 18 is approximated.
- the heat release curve shows 20 a course in which the resulting signal peaks 22 and 24 show the same position with respect to the crankshaft angle as the first signal peak 14 and the pair of signal peaks 16 and 18 of the measurement signal curve 10th
- FIG. 2 shows a diagram in which, together with the measurement signal curve 10 shows a sales rate curve 26 in which the sales rate of hydrocarbons related to the crankshaft angle during of the observed combustion process is shown.
- the sales rate curve 26 shows at the start of combustion that during the pre-injection injected fuel amount a first increase 28 to a turnover rate of about 10%, with the formation of sinusoidal signal fluctuations 30 with a slight slope up to a turnover rate of about 15% for the upper one Dead center TDC of the piston runs out.
- the sales rate curve increases 26 strongly forming a second rise 32, the merges into a gentle outlet 34 until the sales rate curve 26 at a crankshaft angle of -60 ° after top dead center an approximately horizontal course shows.
- the turnover rate curve 26 shows the second increase 32, which at least eventually forms a gentle outlet 34 runs approximately horizontally.
- the connection is also clear here between the course of the measurement signal curve 10 and the course of the conversion rate curve 26 recognizable.
- the Measured signal curve 10 represented by the second signal peak 16 takes also suddenly the proportion of hydrocarbons converted.
- the measurement signal curve 10 has reached its maximum, it falls again evenly, which also causes the decreasing gradient in the second Increase 32 of the sales rate curve 26 can be explained.
- the amount of fuel to be burned simultaneously increases the amount of converted hydrocarbon, like the conversion rate curve 26 with its gentle outlet 34 is documented.
- the sequence of conductivity values which form the measurement signal curve 10
- a sequence of reference values compared that a theoretical course of the conductivity change show during an optimal combustion process and which correspond to the boundary conditions of the monitored combustion process, such as the injection duration, the injection timing or the injection process have been selected.
- the two episodes are compared with each other at least approximately identical crankshaft angles occur. Thereby there is a deviation in the actual combustion process determine from the theoretically optimal combustion process, so that in a subsequent combustion process, the injection accordingly can be changed.
- the malfunction can be determined from the measured signal curve 10 individual components of the internal combustion engine can be determined. If at least some of the conductivity values exceed the reference values, can be inferred to an insufficient exhaust gas recirculation, for example due to a malfunction of the exhaust gas recirculation valve or Blockage of the branch at which the exhaust gas is discharged from the exhaust system is caused. Is the sequence of conductivity values or the Measurement signal curve 10 with respect to the reference values stored from the sequence formed reference curve in the direction of the end of the combustion process shifted, this means that during the monitored combustion process Too little oxygen in the air-fuel mixture was. This can be a malfunction, for example derive a leak from the turbocharger.
- the measured conductivity values are preferably around the same Amount mostly below the corresponding reference values this is that the amount of fuel injected is not the desired one Amount of fuel corresponds to that previously determined by the engine control has been. A malfunction of the injection valve or diagnose reduced pump performance.
- the signal curve of the measurement signal curve 10 can be used exactly read at what time, i.e. at what crankshaft angle, the fuel has ignited for how long the combustion process lasted, and when the end of combustion occurred. Through this exact information taken from the measurement signal curve 10 can be the fuel injection into the cylinder accordingly the desired engine power can be regulated.
- the method described above can also be used in internal combustion engines use those that run on petrol.
- petrol engines there is also the possibility, by setting the ignition timing, where the air-fuel mixture in the cylinder through the spark plug or the spark plugs are ignited, specifically change.
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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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
- Fig. 1
- ein Diagramm, in dem eine im Zylinder eines Verbrennungsmotors aufgenommene Leitfähigkeits-Meßsignalkurve sowie eine Wärmefreisetzungskurve gezeigt sind, wobei beide Kurven auf den Kurbelwellenwinkel des Verbrennungsmotors bezogen sind, und
- Fig. 2
- ein Diagramm, in dem die im Zylinder aufgenommene Leitfähigkeits-Meßsignalkurve gemeinsam mit einer Umsatzratenkurve für Kohlenwasserstoffe gezeigt ist, wobei auch hier beide Kurven auf den Kurbelwellenwinkel des Verbrennungsmotors bezogen sind.
- 10
- positive Meßsignalkurve
- 12
- Signalschwankungen der Meßsignalkurve
- 14
- erste Signalspitze der Meßsignalkurve
- 16
- zweite Signalspitze der Meßsignalkurve
- 18
- dritte Signalspitze der Meßsignalkurve
- 20
- Wärmefreisetzungskurve
- 22
- erste Signalspitze der Wärmefreisetzungskurve
- 24
- zweite Signalspitze der Wärmefreisetzungskurve
- 26
- Umsatzratenkurve
- 28
- erster Anstieg der Umsatzratenkurve
- 30
- Signalschwankungen der Umsatzratenkurve
- 32
- zweiter Anstieg der Umsatzratenkurve
- 34
- sanfter Auslauf der Umsatzratenkurve
Claims (16)
- Verfahren zur Überwachung des Verbrennungsvorgangs bei der Verbrennung fossiler Brennstoffe, insbesondere bei der Verbrennung fossiler Brennstoffe in einem Zylinder eines Verbrennungsmotors, wobei bei dem Verfahren eine Folge von Leitfähigkeitswerten während eines zeitlich begrenzten Verbrennungsvorgangs bestimmt und die Folge von Leitfähigkeitswerten zur Überwachung des Verbrennungsvorgangs ausgewertet wird,
dadurch gekennzeichnet,
daß die Folge von Leitfähigkeitswerten auf dem Anteil positiv geladener Teilchen im Verbrennungsgas basiert. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Folge von Leitfähigkeitswerten mit einer Folge gespeicherter Referenzwerte verglichen wird, die einen theoretischen Verlauf der Leitfähigkeitsänderung während eines optimierten Verbrennungsvorgangs definieren, dessen Randbedingungen den Randbedingungen des überwachten Verbrennungsvorgangs entsprechen, und daß jeweils Werte der beiden Folgen miteinander verglichen werden, die bei zumindest annähernd identischen Zeitpunkten bei den miteinander zu vergleichenden Verbrennungsvorgängen auftreten. - Verfahren nach Anspruch 2,
dadurch gekennzeichnet,
daß, wenn zumindest ein Teil der Leitfähigkeitswerte die Referenzwerte betragsmäßig übersteigt, bei dem überwachten Verbrennungsvorgang eine unzureichende Abgasrückführung erfolgt ist. - Verfahren nach Anspruch 2 oder 3,
dadurch gekennzeichnet,
daß, wenn die Folge von Leitfähgkeitswerten bezüglich der Folge gespeicherter Referenzwerte in Richtung des Endes des Verbrennungsvorgangs verschoben ist, während des überwachten Verbrennungsvorgangs zuwenig Sauerstoff im Luft-Brennstoff-Gemisch enthalten war. - Verfahren nach Anspruch 4,
dadurch gekennzeichnet,
daß bei der Feststellung eines Sauerstoffmangels während des überwachten Verbrennungsvorgangs, der durch den Einsatz einer zusätzlichen Luftansaugvorrichtung, insbesondere eines Turboladers, unterstützt worden ist, eine Fehlfunktion der Luftansaugvorrichtung diagnostiziert wird. - Verfahren nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet,
daß, wenn zumindest ein großer Prozentsatz der Leitfähigkeitswerte, der vorzugsweise in einem Bereich von wenigstens 75% lag, um zumindest annähernd denselben Betrag von den entsprechenden Referenzwerten abweicht, der Brennstoff während des überwachten Verbrennungsvorgangs mit einer reduzierten Pumpleistung in den Brennraum eingespritzt wurde. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß aus der Folge von Leitfähigkeitswerten ein auf den zeitlichen Ablauf des Verbrennungsvorgangs bezogener Signalverlauf dargestellt wird. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet,
daß zur Überwachung des Verbrennungsvorgangs der Verlauf von Signalflanken des Signalverlaufs ausgewertet wird, wobei eine steil ansteigende Signalflanke den Ablauf einer schlagartigen Verbrennung anzeigt, während eine sanft ansteigende Signalflanke den Beginn einer kontinuierlich zunehmenden Verbrennung definiert. - Verfahren nach Anspruch 7 oder 8,
dadurch gekennzeichnet,
daß zur Überwachung des Verbrennungsvorgangs aus dem Signalverlauf die Zündung, die Dauer und das Ende der Verbrennung des Brennstoffes bestimmt wird. - Verfahren nach Anspruch 7, 8 oder 9,
dadurch gekennzeichnet,
daß zur Überwachung des Verbrennungsvorgangs aus dem Signalverlauf die Wirkung der Voreinspritzung bestimmt wird. - Verfahren nach einem der Ansprüche 7 bis 10,
dadurch gekennzeichnet,
daß aus dem Signalverlauf die Umsatzrate der Kohlenwasserstoffe unmittelbar bestimmt wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß aus dem Betrag des jeweiligen Leitfähigkeitswertes die Temperatur ermittelt wird, die während des Zeitpunktes des überwachten Verbrennungsvorgangs auftrat, als der Leitfähigkeitswert erfaßt wurde. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß aus der Folge von Leitfähigkeitswerten die Wärmefreisetzung während des überwachten Verbrennungsvorgangs unmittelbar ermittelt wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß das Verfahren bei einem Verbrennungsmotor eingesetzt wird, wobei die Verbrennungsvorgänge in jedem Zylinder überwachtet werden. - Verfahren nach Anspruch 14,
dadurch gekennzeichnet,
daß aufeinanderfolgend für jeden Zylinder eine Folge von Leitfähigkeitswerten erstellt wird, die anschließend miteinander verglichen werden, und daß bei Abweichungen zwischen den Folgen von Leitfähigkeitswerten der einzelnen Zylinder die nachfolgenden Verbrennungsvorgänge in den einzelnen Zylindern derart aufeinander abgestimmt werden, daß die Zylinder bei einer Überprüfung der Verbrennungsvorgänge zumindest annähernd identische Folgen von Leitfähigkeitswerten zeigen. - Verfahren nach Anspruch 14 oder 15,
dadurch gekennzeichnet,
daß aufeinanderfolgend für jeden Zylinder eine Folge von Leitfähigkeitswerten erstellt wird, die jeweils mit einer Folge gespeicherter Referenzwerte verglichen wird, die einen theoretischen Verbrennungsvorgang definieren, bei dem der jeweilige Zylinder maximale Leistung erbringt, und daß bei Abweichungen der Folge von Leitfähigkeitswerten des betreffenden Zylinders von der Folge gespeicherter Referenzwerte die nachfolgenden Verbrennungsvorgänge entsprechend einer Leistungsmaximierung des betreffenden Zylinders geregelt werden.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU90495 | 1999-12-24 | ||
LU90495A LU90495B1 (en) | 1999-12-24 | 1999-12-24 | Device and method for ion current sensing |
DE10011620 | 2000-03-10 | ||
DE10011620A DE10011620A1 (de) | 1999-12-24 | 2000-03-10 | Verfahren zur Überwachung des Verbrennungsvorgangs bei der Verbrennung fossiler Brennstoffe |
Publications (2)
Publication Number | Publication Date |
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EP1113170A1 true EP1113170A1 (de) | 2001-07-04 |
EP1113170B1 EP1113170B1 (de) | 2005-03-09 |
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Application Number | Title | Priority Date | Filing Date |
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EP00127161A Expired - Lifetime EP1113170B1 (de) | 1999-12-24 | 2000-12-12 | Verfahren zur Überwachung des Verbrennungsvorgangs bei der Verbrennung fossiler Brennstoffe |
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EP (1) | EP1113170B1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1489296A1 (de) * | 2003-06-20 | 2004-12-22 | Delphi Technologies, Inc. | Treiberschaltung |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4232545A (en) * | 1978-01-19 | 1980-11-11 | Robert Bosch Gmbh | Apparatus for detecting pressure fluctuations in the combustion chamber of an internal combustion engine |
FR2675206A1 (fr) * | 1991-04-10 | 1992-10-16 | Siemens Automotive Sa | Procede et dispositif de detection d'un rate d'allumage dans un moteur a combustion interne et leurs applications. |
JPH05222989A (ja) * | 1992-02-14 | 1993-08-31 | Hitachi Ltd | 空燃比制御装置 |
US5263452A (en) * | 1991-11-26 | 1993-11-23 | Mitsubishi Denki K.K. | Knocking detector for internal combustion engine |
JPH07229443A (ja) * | 1994-02-18 | 1995-08-29 | Mitsubishi Electric Corp | 内燃機関の制御装置 |
EP0895076A2 (de) * | 1997-06-26 | 1999-02-03 | Cooper Industries, Inc. | Erfassung des verbrannten Massenbruchteils und Schätzung des Druckes durch den Ionenstrom der Zündkerze |
EP0950885A2 (de) * | 1998-04-15 | 1999-10-20 | DaimlerChrysler AG | Verfahren zur Bestimmung der Laufruhe eines Ottomotors |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS62249051A (ja) * | 1986-04-22 | 1987-10-30 | Mitsubishi Electric Corp | 内燃機関のイオン電流検出装置 |
JP2641799B2 (ja) * | 1990-11-30 | 1997-08-20 | 三菱電機株式会社 | イオン電流検出装置 |
JPH04203270A (ja) * | 1990-11-29 | 1992-07-23 | Mitsubishi Electric Corp | イオン電流検出装置 |
-
2000
- 2000-12-12 EP EP00127161A patent/EP1113170B1/de not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4232545A (en) * | 1978-01-19 | 1980-11-11 | Robert Bosch Gmbh | Apparatus for detecting pressure fluctuations in the combustion chamber of an internal combustion engine |
FR2675206A1 (fr) * | 1991-04-10 | 1992-10-16 | Siemens Automotive Sa | Procede et dispositif de detection d'un rate d'allumage dans un moteur a combustion interne et leurs applications. |
US5263452A (en) * | 1991-11-26 | 1993-11-23 | Mitsubishi Denki K.K. | Knocking detector for internal combustion engine |
JPH05222989A (ja) * | 1992-02-14 | 1993-08-31 | Hitachi Ltd | 空燃比制御装置 |
JPH07229443A (ja) * | 1994-02-18 | 1995-08-29 | Mitsubishi Electric Corp | 内燃機関の制御装置 |
EP0895076A2 (de) * | 1997-06-26 | 1999-02-03 | Cooper Industries, Inc. | Erfassung des verbrannten Massenbruchteils und Schätzung des Druckes durch den Ionenstrom der Zündkerze |
EP0950885A2 (de) * | 1998-04-15 | 1999-10-20 | DaimlerChrysler AG | Verfahren zur Bestimmung der Laufruhe eines Ottomotors |
Non-Patent Citations (2)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 017, no. 671 (M - 1525) 10 December 1993 (1993-12-10) * |
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 11 26 December 1995 (1995-12-26) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1489296A1 (de) * | 2003-06-20 | 2004-12-22 | Delphi Technologies, Inc. | Treiberschaltung |
US7373803B2 (en) | 2003-06-20 | 2008-05-20 | Delphi Technologies | Driver circuit for an ion measurement device |
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