DE19506133B4 - Device for detecting the internal pressure in the combustion chamber of at least one cylinder of an internal combustion engine - Google Patents
Device for detecting the internal pressure in the combustion chamber of at least one cylinder of an internal combustion engine Download PDFInfo
- Publication number
- DE19506133B4 DE19506133B4 DE19506133A DE19506133A DE19506133B4 DE 19506133 B4 DE19506133 B4 DE 19506133B4 DE 19506133 A DE19506133 A DE 19506133A DE 19506133 A DE19506133 A DE 19506133A DE 19506133 B4 DE19506133 B4 DE 19506133B4
- Authority
- DE
- Germany
- Prior art keywords
- pressure
- signal
- cylinder
- charge amplifier
- pressure sensor
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 238000011156 evaluation Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract 2
- 238000005259 measurement Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 4
- 230000010354 integration Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- 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
- F02D41/26—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
-
- 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
- G01L23/08—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 operated electrically
- G01L23/10—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 operated electrically by pressure-sensitive members of the piezoelectric type
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/11—Testing internal-combustion engines by detecting misfire
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Measuring Fluid Pressure (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Vorrichtung zur Erfassung des Brennrauminnendruckes mindestens eines Zylinders einer Verbrennungskraftmaschine mit mindestens einem Drucksensor; einem Sensor, der ein Signal erzeuqt, das den Zeitbereich der, Druckänderungen des Zylinders identifziert, mindestens einem Ladungsverstärker zur Erzeugung eines verstärkten Drucksensor-Signals, mindestens einem Mittel zur Auswahl der Drucksensor-Signale der einzelnen Zylinder in Abhängigkeit von dem Signal, das den Zeitbereich, der Druckänderungen des Zylinders identifiziert, und einer die verstärkten Drucksensor-Signale verarbeitenden Auswerteeinrichtung,
dadurch gekennzeichnet, dass Mittel (S1), welche die Eingänge der Ladungsverstärker (3) auf einen bestimmten Wert zurücksetzen, vorgesehen sind und
mindestens ein Mittel (5) vorgesehen ist, das in Abhängigkeit des Signals (KW, KI), das den Zeitbereich der Druckänderungen, des Zylinders identifiziert die Ladungsverstärker (3) zum Zurücksetzen auswählt.Device for detecting the internal pressure in the combustion chamber of at least one cylinder of an internal combustion engine with at least one pressure sensor; a sensor that generates a signal that identifies the time range of the pressure changes of the cylinder, at least one charge amplifier for generating an amplified pressure sensor signal, at least one means for selecting the pressure sensor signals of the individual cylinders depending on the signal that corresponds to the time range , which identifies changes in pressure of the cylinder, and an evaluation device which processes the amplified pressure sensor signals,
characterized in that means (S1) are provided which reset the inputs of the charge amplifiers (3) to a specific value, and
At least one means (5) is provided which, depending on the signal (KW, KI) identifying the time range of the pressure changes, of the cylinder selects the charge amplifiers (3) for resetting.
Description
Die Erfindung betrifft eine Vorrichtung zur Erfassung des Brennrauminnendruckes mindestens eines Zylinders einer Verbrennungskraftmaschine mit mindestens einem Drucksensor, einem Sensor zur Erzeugung eines den Zeitbereich der Druckänderungen der Zylinder identifizierenden Signals, mindestens einen Ladungsverstärker zur Erzeugung eines verstärkten Drucksensor-Signals, mindestens einer Auswahleinrichtung, die die Drucksensor-Signale der einzelnen Zylinder in Abhängigkeit des die Druckänderungen der Zylinder identifizierenden Signals an eine Auswerteeinrichtung weiterleitet.The invention relates to a device to record the internal combustion chamber pressure of at least one cylinder an internal combustion engine with at least one pressure sensor, a sensor for generating a time range of the pressure changes of the cylinder identifying signal, at least one charge amplifier for Generation of a reinforced Pressure sensor signal, at least one selection device, the Pressure sensor signals of the individual cylinders depending of the pressure changes the cylinder identifying signal to an evaluation device forwards.
Eine derartige Vorrichtung zur Erfassung
des Zylinderinnenraumdruckes von Mehrzylindermaschinen ist in der
Deutschen Offenlegungsschrift
In der europäischen Patentanmeldung
Bei einer anderen Ladungsverstärkerschaltung
wie sie beispielsweise aus der
Die Aufgabe der Erfindung besteht darin, eine Vorrichtung zur Erfassung des Brennrauminnendruckes mindestens eines Zylinders einer Verbrennungskraftmaschine zu schaffen, bei der eine Drift des Ausgangssignals der den Drucksensoren zugeordneten Ladungsverstärker über mehrere Meßperioden für jeden Zylinder vermieden wird.The object of the invention is therein, a device for detecting the internal pressure in the combustion chamber to create at least one cylinder of an internal combustion engine, in which a drift of the output signal associated with the pressure sensors Charge amplifier over several measurement periods for each Cylinder is avoided.
Die Aufgabe wird durch die Merkmale des Patentanspruchs gelöst. Vorteilhafte Weiterbildungen sind in den Unteransprüchen beschrieben.The task is characterized by the characteristics of the claim solved. Advantageous further developments are described in the subclaims.
Erfindungsgemäß sind Mittel, die die Signaleingänge der Ladungsverstärker auf einen vorbestimmten Wert zurücksetzen, und mindestens ein Mittel vorgesehen, das in Abhängigkeit des den Zeitbereich der Druckänderungen der Zylinder identifizie renden Signals die Ladungsverstärker zum Zurücksetzen auswählt. Damit wird zwar während einer kurzen Meßphase des jeweiligen Zylinders, vorzugsweise während eines Zeitfensters um den Arbeitstotpunkt eine freie Drift des Ausgangssignals des Ladungsverstärkers zugelassen, da jedoch zwischen zwei Verbrennungszyklen der Signaleingang auf einen vorgegebenen Wert rückgesetzt wird, beginnt der als Integrator geschaltete Ladungsverstärker jeweils an einem definierten Arbeitspunkt zu arbeiten. Insbesondere bei Messungen an mehreren Zylindern einer Verbrennungskraftmaschine kann die Bestimmung der Meßphase und der Rücksetzphase alle Ladungsverstärker mit Hilfe eines die Druckänderungen identifizierenden Signals, vorzugsweise des Kurbelwinkelsignals erfolgen.According to the invention are means that the signal inputs of the charge amplifier reset to a predetermined value, and at least one means is provided depending on the time range of pressure changes the cylinder identifies the signal to the charge amplifier Reset to default selects. This is true during a short measurement phase of the respective cylinder, preferably during a time window the working dead center allows a free drift of the output signal of the charge amplifier, however, between two combustion cycles the signal input on reset a predetermined value the charge amplifier connected as an integrator begins work at a defined working point. Especially at Measurements on several cylinders of an internal combustion engine can determine the measurement phase and the reset phase all charge amplifiers with the help of an identifying the pressure changes Signal, preferably the crank angle signal.
Nach einer vorteilhaften Ausführungsform weist das Mittel, daß die Ladungsverstärker zum Zurücksetzen auswählt eine Demultiplexfunktion und die Auswahleinrichtung zur Weiterleitung der Ausgangssignale der Ladungsverstärker an die Auswerteeinrichtung eine Multiplexfunktion auf.According to an advantageous embodiment the means that the charge amplifier to reset selects a demultiplex function and the selector for forwarding the output signals of the charge amplifier to the evaluation device a multiplex function.
Gemäß einer bevorzugten Weiterbildung der Erfindung ist die Auswahleinrichtung zur Weiterleitung der Drucksensor-Signale entweder den Drucksensoren oder den Ladungsverstärkern nachgeschaltet, insbesondere bei Verbrennungskraftmaschinen mit einer Vielzahl von Zylindern führt die direkte Anordnung der Auswahleinrichtung nach den Drucksensoren zur einer wesentlichen Einsparung von Ladungsverstärkern.According to a preferred development the invention is the selection device for forwarding the pressure sensor signals either downstream of the pressure sensors or the charge amplifiers, in particular in internal combustion engines with a large number of cylinders leads the direct arrangement of the selection device after the pressure sensors for a substantial saving of charge amplifiers.
Um ein ausreichend großes Zeitfenster für die Meßphase über ein Kurbelwinkelintervall von 720° zu erreichen, sieht eine vorteilhafte Ausbildung der Erfindung bei Verbrennungskraftmaschinen mit einer Vielzahl von Zylindern weiterhin vor, zwei Vorrichtungen parallel anzuordnen, die zeitlich versetzt um einen Arbeitstotpunkt eines Zylinders arbeiten, wobei die erste Vorrichtung die ersten Zylinder und zweite Vorrichtung die weiteren Zylinder auswertet.To a sufficiently large time window for the Measuring phase over a Crank angle interval of 720 ° too achieve an advantageous embodiment of the invention Internal combustion engines with a variety of cylinders continue propose to arrange two devices in parallel, which are offset in time work a cylinder dead center, the first Device the first cylinder and second device the others Cylinder evaluates.
Nachfolgend wird die Erfindung an mehreren Ausführungsbeispielen näher erläutert. Die zugehörigen Zeichnungen zeigen:The invention is as follows several embodiments explained in more detail. The associated The drawings show:
Die in
Das Schaltbild eines Ladungsverstärkers mit einer
Rücksetzeinrichtung
S1 ist in
- 1a1a
- Drucksensorenpressure sensors
- 1b1b
- Drucksensorenpressure sensors
- 1c1c
- Drucksensorenpressure sensors
- 1d1d
- Drucksensorenpressure sensors
- 22
- KurbelwinkelsensorCrank angle sensor
- 3a3a
- Ladungsverstärkercharge amplifier
- 3b3b
- Ladungsverstärkercharge amplifier
- 3c3c
- Ladungsverstärkercharge amplifier
- 3d3d
- Ladungsverstärkercharge amplifier
- 44
- Multiplexschaltungmultiplexing circuit
- 4a4a
- Multiplexschaltungmultiplexing circuit
- 4b4b
- Multiplexschaltungmultiplexing circuit
- 55
- Demultiplexschaltungdemultiplexing
- 66
- Auswerteeinrichtungevaluation
- M1 M 1
- Zylindercylinder
- M2 M 2
- Zylindercylinder
- M3 M 3
- Zylindercylinder
- M4 M 4
- Zylindercylinder
- OTOT
- ArbeitstotpunktArbeitstotpunkt
- KWKW
- KurbelwinkelsignalCrank angle signal
- KIKI
- aufbereitetes Kurbelwinkelsignalrecycled Crank angle signal
- KHKH
- aufbereitetes Kurbelwinkelsignalrecycled Crank angle signal
- A1 A 1
- Ausgangssignaleoutput signals
- A2 A 2
- Ausgangssignaleoutput signals
- A3 A 3
- Ausgangssignaleoutput signals
- A4 A 4
- Ausgangssignaleoutput signals
- z1 z 1
- Ausgangssignaleoutput signals
- z2 z 2
- Ausgangssignaleoutput signals
- z3 z 3
- Ausgangssignaleoutput signals
- z4 z 4
- Ausgangssignaleoutput signals
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19506133A DE19506133B4 (en) | 1994-03-04 | 1995-02-22 | Device for detecting the internal pressure in the combustion chamber of at least one cylinder of an internal combustion engine |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4407258.9 | 1994-03-04 | ||
DE4407258 | 1994-03-04 | ||
DE19506133A DE19506133B4 (en) | 1994-03-04 | 1995-02-22 | Device for detecting the internal pressure in the combustion chamber of at least one cylinder of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19506133A1 DE19506133A1 (en) | 1995-09-07 |
DE19506133B4 true DE19506133B4 (en) | 2004-05-27 |
Family
ID=6511881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19506133A Expired - Fee Related DE19506133B4 (en) | 1994-03-04 | 1995-02-22 | Device for detecting the internal pressure in the combustion chamber of at least one cylinder of an internal combustion engine |
Country Status (1)
Country | Link |
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DE (1) | DE19506133B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103234693A (en) * | 2013-04-02 | 2013-08-07 | 深圳市元征科技股份有限公司 | Digital device and method for cylinder pressure detection |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19741884C2 (en) * | 1997-09-23 | 2000-12-21 | Daimler Chrysler Ag | Method for determining relevant quantities that represent the cylinder pressure in the cylinders of an internal combustion engine |
DE19900738C1 (en) * | 1999-01-12 | 2000-06-15 | Daimler Chrysler Ag | Determining combustion chamber pressure in combustion engine; involves treating sensor offset as variable over compression or expansion phases derived from estimated, measured pressures |
JP4309158B2 (en) * | 2003-03-19 | 2009-08-05 | 富士重工業株式会社 | Charge signal conversion amplifier and in-cylinder pressure measuring device |
JP4094475B2 (en) * | 2003-04-21 | 2008-06-04 | 富士重工業株式会社 | Combustion pressure data collection system for multi-cylinder engines |
JP4387738B2 (en) * | 2003-09-18 | 2009-12-24 | 富士重工業株式会社 | Charge signal conversion amplifier |
JP4334959B2 (en) * | 2003-09-19 | 2009-09-30 | 富士重工業株式会社 | Combustion pressure data collection system for multi-cylinder engines |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0325903A2 (en) * | 1988-01-25 | 1989-08-02 | AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List | Charge amplifier circuit |
DE3905824A1 (en) * | 1988-02-22 | 1989-11-16 | Mitsubishi Electric Corp | Device for detecting the pressure in a cylinder of an internal combustion engine |
DE4020681A1 (en) * | 1989-06-27 | 1991-01-10 | Mitsubishi Electric Corp | Internal cylinder pressure measurer for IC engine - selectively passes cylinder pressure detector signals to computer performing real=time pressure parameter derivation |
DE4121884A1 (en) * | 1990-07-06 | 1992-01-23 | Mitsubishi Electric Corp | CONTROL DEVICE FOR A COMBUSTION ENGINE |
EP0253016B1 (en) * | 1986-07-18 | 1992-02-26 | Kistler Instrumente AG | Charge amplifier circuit |
DE3744738C2 (en) * | 1986-02-19 | 1994-09-22 | Honda Motor Co Ltd | Ignition timing control for internal combustion engine |
DE4244807C2 (en) * | 1991-12-09 | 1999-09-30 | Honda Motor Co Ltd | Misfire detecting system for internal combustion engine |
-
1995
- 1995-02-22 DE DE19506133A patent/DE19506133B4/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3744738C2 (en) * | 1986-02-19 | 1994-09-22 | Honda Motor Co Ltd | Ignition timing control for internal combustion engine |
EP0253016B1 (en) * | 1986-07-18 | 1992-02-26 | Kistler Instrumente AG | Charge amplifier circuit |
EP0325903A2 (en) * | 1988-01-25 | 1989-08-02 | AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List | Charge amplifier circuit |
DE3905824A1 (en) * | 1988-02-22 | 1989-11-16 | Mitsubishi Electric Corp | Device for detecting the pressure in a cylinder of an internal combustion engine |
DE4020681A1 (en) * | 1989-06-27 | 1991-01-10 | Mitsubishi Electric Corp | Internal cylinder pressure measurer for IC engine - selectively passes cylinder pressure detector signals to computer performing real=time pressure parameter derivation |
DE4121884A1 (en) * | 1990-07-06 | 1992-01-23 | Mitsubishi Electric Corp | CONTROL DEVICE FOR A COMBUSTION ENGINE |
DE4244807C2 (en) * | 1991-12-09 | 1999-09-30 | Honda Motor Co Ltd | Misfire detecting system for internal combustion engine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103234693A (en) * | 2013-04-02 | 2013-08-07 | 深圳市元征科技股份有限公司 | Digital device and method for cylinder pressure detection |
Also Published As
Publication number | Publication date |
---|---|
DE19506133A1 (en) | 1995-09-07 |
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8110 | Request for examination paragraph 44 | ||
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8339 | Ceased/non-payment of the annual fee |