DE10028885B4 - Method and device for detecting the combustion chamber pressure occurring in a combustion chamber of an internal combustion engine - Google Patents
Method and device for detecting the combustion chamber pressure occurring in a combustion chamber of an internal combustion engine Download PDFInfo
- Publication number
- DE10028885B4 DE10028885B4 DE2000128885 DE10028885A DE10028885B4 DE 10028885 B4 DE10028885 B4 DE 10028885B4 DE 2000128885 DE2000128885 DE 2000128885 DE 10028885 A DE10028885 A DE 10028885A DE 10028885 B4 DE10028885 B4 DE 10028885B4
- Authority
- DE
- Germany
- Prior art keywords
- combustion chamber
- sensor means
- signal
- correction
- chamber pressure
- 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.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
-
- 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
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2474—Characteristics of sensors
-
- 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
- G01L23/222—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 using piezoelectric devices
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
- F02D2041/281—Interface circuits between sensors and control unit
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Verfahren zum Erfassen des in einem Brennraum einer Brennkraftmaschine auftretenden Brennraumdrucks, wobei mit Hilfe von Sensormitteln (3) eine durch einen in dem Brennraum (1) ablaufenden Verbrennungsvorgang hervorgerufene Bewegung des Brennraumgehäuses gemessen und aus dem Messsignal der Sensormittel (3) eine Aussage über den im Brennraum (1) auftretenden Brennraumdruck abgeleitet wird, dadurch gekennzeichnet, dass der anhand des Messsignals der Sensormittel (3) ermittelte Brennraumdruck mit dem tatsächlich in dem Brennraum (1) während eines Verbrennungsvorgangs auftretenden Brennraumdruck verglichen und davon abhängig ein entsprechendes Korrektursignal erzeugt wird, und dass anschließend das Messsignal der Sensormittel (3) gemäß dem Korrektursignal korrigiert wird und das somit korrigierte Messsignal der Sensormittel (3) für die Gewinnung der Aussage über den Brennraumdruck verwendet wird.Method for detecting the combustion chamber pressure occurring in a combustion chamber of an internal combustion engine, with the aid of sensor means (3) measuring a movement of the combustion chamber housing caused by a combustion process taking place in the combustion chamber (1) and from the measurement signal of the sensor means (3) providing information about the combustion chamber Combustion chamber (1) occurring combustion chamber pressure is derived, characterized in that the basis of the measurement signal of the sensor means (3) determined combustion chamber pressure with the actually occurring in the combustion chamber (1) during combustion process combustion chamber pressure and dependent on a corresponding correction signal is generated, and that Subsequently, the measurement signal of the sensor means (3) is corrected according to the correction signal and the thus corrected measurement signal of the sensor means (3) is used for obtaining the statement about the combustion chamber pressure.
Description
Die vorliegende Erfindung betrifft ein Verfahren nach dem Oberbegriff des Anspruches 1 zum Erfassen des in einem Brennraum einer Brennkraftmaschine auftretenden Brennraumdrucks sowie eine entsprechende Vorrichtung nach dem Oberbegriff des Anspruches 5.The The present invention relates to a method according to the preamble of claim 1 for detecting the in a combustion chamber of an internal combustion engine occurring combustion chamber pressure and a corresponding device according to the preamble of claim 5.
Auf
dem Gebiet der Kraftfahrzeugtechnik ist die Überwachung des im Brennraum
(Zylinder) eines Verbrennungsmotors, insbesondere eines Diesel- oder
Ottomotors, auftretenden Brennraum- oder Zylinderdrucks von besonderer
Bedeutung, da durch Auswertung des Brennraumdrucks der in dem jeweiligen
Brennraum ablaufende Verbrennungsvorgang überwacht und insbesondere eine
Aussage über
den Zündzeitpunkt
getroffen werden kann. So ist beispielsweise in der
Zylinderdrucksensoren sind jedoch sehr kostspielig. Daher wurde zum Erfassen des in einem Brennraum einer Brennkraftmaschine auftretenden Brennraumdrucks die Verwendung von sogenannten Zylinderkopfdichtspaltsensoren vorgeschlagen. Diese Sensoren, welche im Zylinderkopf bzw. in der Zylinderkopfdichtung angeordnet sind, umfassen Piezoelemente, welche eine infolge eines Verbrennungsvorgangs in dem jeweiligen Zylinder auftretende Bewegung oder Dehnung des Zylinderkopfs erfassen. Durch eine Verbrennung werden Kräfte auf den Zylinderkopf ausgeübt, die zu einer entsprechenden geringfügigen Dehnung des Zylinderkopfs bzw. des Zylindergehäuses führen, welche wiederum entsprechend die im Zylinderkopf vorhandenen Piezoelemente der Zylinderkopfdichtspaltsensoren beeinflusst. Durch Auswertung des von den Zylinderkopfdichtspaltsensoren gelieferten Messignals kann somit indirekt auf den Zylinderdruck geschlossen werden.Cylinder pressure sensors But they are very expensive. Therefore, was to capture the in a combustion chamber an internal combustion engine occurring combustion chamber pressure the use proposed by so-called cylinder head gasket sensors. These Sensors, which in the cylinder head or in the cylinder head gasket are arranged, include piezoelectric elements, which one due to a Combustion process occurring in the respective cylinder movement or detecting elongation of the cylinder head. By a burn become forces applied to the cylinder head, to a corresponding slight elongation of the cylinder head or the cylinder housing to lead, which in turn corresponding to the piezoelectric elements present in the cylinder head the cylinder head gasket sensors. By evaluation of the measurement signal supplied from the cylinder head seal gap sensors can thus be closed indirectly to the cylinder pressure.
Untersuchungen haben jedoch ergeben, dass durch Auswertung des ursprünglichen Messignals eines Zylinderkopfdichtspaltsensors keine zuverlässige Aussage über den Zylinderdruck gewonnen werden kann, was insbesondere durch die nichtlineare Verknüpfung oder Überlagerung der verschiedenen Zylinder des entsprechenden Verbrennungsmotors bedingt ist.investigations However, have revealed that by evaluating the original Measurement signal of a cylinder head gasket sensor no reliable statement about the Cylinder pressure can be obtained, which in particular by the non-linear shortcut or overlay the different cylinders of the corresponding internal combustion engine is conditional.
Dokument
Dokument
Dokument
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein verbessertes Verfahren sowie eine verbesserte Vorrichtung zum Erfassen des in einem Brennraum einer Brennkraftmaschine auftretenden Brennraumdrucks vorzuschlagen, womit bei Verwendung von Sensoren, welche eine durch einen in dem Brennraum ablaufenden Verbrennungsvorgang hervorgerufene Bewegung des Brennraumgehäuses erfassen, eine zuverlässige Aussage über den Brennraumdruck aus dem Messignal der Sensoren abgeleitet werden kann.Of the The present invention is therefore based on the object, an improved Method and an improved device for detecting the in a combustion chamber pressure occurring in a combustion chamber of an internal combustion engine to propose, which with the use of sensors, which by a caused a running in the combustion chamber combustion process Detecting movement of the combustion chamber housing, a reliable one Statement about the combustion chamber pressure can be derived from the measuring signal of the sensors can.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren mit den Merkmalen des Anspruches 1 bzw. eine Vorrichtung mit den Merkmalen des Anspruches 5 gelöst. Die Unteransprüche definieren bevorzugte und vorteilhafte Ausführungsformen der vorliegenden Erfindung.These The object is achieved by a Method with the features of claim 1 and a device solved with the features of claim 5. The subclaims define preferred and advantageous embodiments of the present invention.
Erfindungsgemäß werden zum Erfassen des in einem Brennraum einer Brennkraftmaschine auftretenden Brennraumdrucks Sensormittel verwendet, die eine durch einen in dem Brennraum ablaufenden Verbrennungsvorgang hervorgerufene Bewegung, insbesondere Dehnungsbewegung, des Brennraumgehäuses messen. Diese Sensoren können insbesondere im Zylinderkopf bzw. in der Zylinderkopfdichtung angeordnet sein und erfassen zur indirekten Brennraumdruckmessung eine durch einen Verbrennungsvorgang hervorgerufene Zylinderkopfbewegung.According to the invention for detecting the occurring in a combustion chamber of an internal combustion engine Combustion chamber pressure sensor means used by a in the combustion chamber running combustion process caused movement, in particular Measure expansion movement of the combustion chamber housing. These sensors can arranged in particular in the cylinder head or in the cylinder head gasket be and capture the indirect combustion chamber pressure measurement by a a combustion process caused cylinder head movement.
Um eine Aussage über den Brennraumdruck abzuleiten, wird erfindungsgemäß nicht das Rohsignal dieser Sensormittel ausgewertet, sondern es wird das gemäß einem bestimmten Korrektursignal korrigierte Messignal dieser Sensormittel ausgewertet. Das Korrektursignal bzw. die für jeden Messwert vorgesehenen Korrekturwerte sind dabei derart festgelegt, dass das korrigierte Messignal der Sensormittel möglichst gut mit dem Messignal eines Drucksensors übereinstimmt.Around a statement about derive the combustion chamber pressure is not according to the invention evaluated the raw signal of this sensor means, but it will be the according to one certain correction signal corrected measurement signal of this sensor means evaluated. The correction signal or provided for each measured value Correction values are set such that the corrected Measurement signal of the sensor means possible agrees well with the measuring signal of a pressure sensor.
Diese Vorgehensweise entspricht einer Kalibrierung der Sensormittel, wobei vorzugsweise vor dem eigentlichen Betrieb der Brennkraftmaschine die Abweichung zwischen dem Messignal der Sensormittel und dem in dem jeweiligen Brennraum tatsächlich auftretenden Brennraumdruck ermittelt wird, um davon abhängig das Korrektursignal bzw. die Korrekturwerte zu bestimmen. Im eigentlichen Betrieb der Brennkraftmaschine kann dann das Messignal der Sensormittel in Form einer einfachen numerischen Signalverarbeitung korrigiert werden, so dass das korrigierte Messignal anschließend zur Bestimmung des Brennraumdrucks ausgewertet werden kann.These Approach corresponds to a calibration of the sensor means, wherein preferably before the actual operation of the internal combustion engine the deviation between the measuring signal of the sensor means and the in the respective combustion chamber actually occurring combustion chamber pressure is determined to depend on the Correction signal or to determine the correction values. In the actual Operation of the internal combustion engine can then be the measurement signal of the sensor means corrected in the form of a simple numeric signal processing be, so that the corrected measurement signal then to Determination of the combustion chamber pressure can be evaluated.
Zylinderkopfdichtspaltsensoren besitzen die Eigenschaft, dass mit zunehmender Entfernung der Kurbelwelle vom sogenannten oberen Totpunkt das Übertragungsverhalten dieser Sensoren immer stärker verändert wird. Durch Anwendung der vorliegenden Erfindung kann der Vertrauensbereich um den oberen Totpunkt, d. h. der Bereich, in dem eine zuverlässige Aussage über den Brennraumdruck aus dem Messignal des Zylinderkopfdichtspaltsensors abgeleitet werden kann, erweitert werden, wobei mit einem vertretbaren Aufwand beispielsweise der Vertrauensbereich ±20°KW um den oberen Totpunkt der Kurbelwelle betragen kann.Cylinder head sealing gap sensors own the property that with increasing distance of the crankshaft from the so-called top dead center the transmission behavior of this Sensors are getting stronger changed becomes. By applying the present invention, the confidence interval around top dead center, d. H. the area in which a reliable statement about the Combustion chamber pressure from the measured signal of the cylinder head gasket sensor can be extended, with an acceptable Expense, for example, the confidence range ± 20 ° CA to the top dead center of the crankshaft can amount.
Die vorliegende Erfindung eignet sich insbesondere auf dem Gebiet der Kraftfahrzeugtechnik zur Überwachung des Zünd- oder Verbrennungsablaufs in einem Zylinder eines Verbrennungsmotors, um durch entsprechende Einstellung eines oder mehrerer Verbrennungsparameter, die beispielsweise die Einspritzmenge oder die Einspritzdauer betreffen, den Verbrennungsvorgang entsprechend zu beeinflussen.The The present invention is particularly useful in the field of Automotive technology for monitoring the ignition or combustion process in a cylinder of an internal combustion engine, by setting one or more combustion parameters accordingly, for example, concern the injection quantity or the injection duration, the To influence the combustion process accordingly.
Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispiels näher unter Bezugnahme auf die beigefügte Zeichnung erläutert.The Invention will be described below with reference to a preferred embodiment closer with reference on the attached Drawing explained.
In
Im
Bereich des Zylinderkopfs oder der Zylinderkopfdichtung ist mindestens
ein: integrierter Drucksensor
In
Des
weiteren ist in
Um
mit größtmöglicher
Zuverlässigkeit
aus dem Messignal des Zylinderkopfdichtspaltsensors
Es
empfiehlt sich daher, den Zylinderkopfdichtspaltsensor
In
der Praxis wird dieses Korrektursignal mehrere Korrekturwerte umfassen,
die separat für
jeden Messwert des Zylinderkopfdichtspaltsensors
Bei
dem in
Das
von der Kalibrierungseinheit
Durch
die zuvor beschriebene Kalibrierung bzw. Korrektur des Messignals
des Zylinderkopfdichtspaltsensors
- 11
- Zylindercylinder
- 22
- Kurbelwellecrankshaft
- 33
- ZylinderkopfdichtspaltsensorCylinder head sealing gap sensor
- 44
- Zündkerzespark plug
- 55
- Kalibrierungseinheitcalibration unit
- 66
- Auswertungseinheitevaluation unit
- 77
- MotorsteuergerätEngine control unit
- 88th
- Kolbenpiston
- 99
- Kurbelwellensensorcrankshaft sensor
- OTOT
- Oberer Totpunkt der KurbelwelleOberer Dead center of the crankshaft
- UTUT
- Unterer Totpunkt der Kurbelwelle Kurbelwellenwinkellower Dead center of crankshaft crankshaft angle
- a–ca-c
- Messignalmeasuring signal
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000128885 DE10028885B4 (en) | 2000-06-10 | 2000-06-10 | Method and device for detecting the combustion chamber pressure occurring in a combustion chamber of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000128885 DE10028885B4 (en) | 2000-06-10 | 2000-06-10 | Method and device for detecting the combustion chamber pressure occurring in a combustion chamber of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10028885A1 DE10028885A1 (en) | 2001-12-13 |
DE10028885B4 true DE10028885B4 (en) | 2010-12-09 |
Family
ID=7645433
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DE2000128885 Expired - Fee Related DE10028885B4 (en) | 2000-06-10 | 2000-06-10 | Method and device for detecting the combustion chamber pressure occurring in a combustion chamber of an internal combustion engine |
Country Status (1)
Country | Link |
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DE (1) | DE10028885B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11131265B2 (en) | 2018-06-06 | 2021-09-28 | Caterpillar Motoren GbmH & Co. KG | Knock mitigation and cylinder balancing in an internal combustion engine |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2862711B1 (en) * | 2003-11-24 | 2007-07-06 | Peugeot Citroen Automobiles Sa | SYSTEM FOR CALIBRATING A PRESSURE ACQUISITION CHAIN IN A DIESEL ENGINE CYLINDER OF A MOTOR VEHICLE |
DE102004051908A1 (en) * | 2004-10-26 | 2006-04-27 | Robert Bosch Gmbh | Method for determining a combustion chamber pressure |
CA2525020C (en) * | 2004-11-09 | 2011-12-20 | Honda Motor Co., Ltd. | A combustion state detecting apparatus for an engine |
EP1731890A1 (en) * | 2005-06-09 | 2006-12-13 | Ford Global Technologies, LLC | Method and apparatus for calibrating the gain of a cylinder pressure sensor of an internal combustion engine |
DE102005039757A1 (en) * | 2005-08-23 | 2007-03-01 | Robert Bosch Gmbh | Diesel-internal combustion engine operating method, involves determining drift of impact sound sensors from temporal change of value compared to another value, where values depend on pressure distribution in one of combustion chambers |
FR2902519A1 (en) * | 2006-10-18 | 2007-12-21 | Siemens Vdo Automotive Sas | Pressure sensor calibrating device for motor vehicle, has processing module determining calibration of sensor from pressure evolution module and pressure measurements, for each operation cycle and before combustion time of cycle |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11131265B2 (en) | 2018-06-06 | 2021-09-28 | Caterpillar Motoren GbmH & Co. KG | Knock mitigation and cylinder balancing in an internal combustion engine |
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DE10028885A1 (en) | 2001-12-13 |
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