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DE2903788A1 - DEVICE FOR DETECTING THE VIBRATIONS WHICH APPEAR IN ANALOMIC COMBUSTION PROCESSES IN COMBUSTION ENGINES - Google Patents

DEVICE FOR DETECTING THE VIBRATIONS WHICH APPEAR IN ANALOMIC COMBUSTION PROCESSES IN COMBUSTION ENGINES

Info

Publication number
DE2903788A1
DE2903788A1 DE19792903788 DE2903788A DE2903788A1 DE 2903788 A1 DE2903788 A1 DE 2903788A1 DE 19792903788 DE19792903788 DE 19792903788 DE 2903788 A DE2903788 A DE 2903788A DE 2903788 A1 DE2903788 A1 DE 2903788A1
Authority
DE
Germany
Prior art keywords
transducer
bearing
base
crankshaft
detecting
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Withdrawn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
DE19792903788
Other languages
German (de)
Inventor
Siegfried Dr Ing Rohde
Gerd Dr Ing Vorberger
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.)
Bayerische Motoren Werke AG
Robert Bosch GmbH
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG, Robert Bosch GmbH filed Critical Bayerische Motoren Werke AG
Priority to DE19792903788 priority Critical patent/DE2903788A1/en
Priority to FR8001098A priority patent/FR2448142A1/en
Priority to JP886480A priority patent/JPS55136928A/en
Priority to IT19605/80A priority patent/IT1129589B/en
Priority to GB8003532A priority patent/GB2041524A/en
Publication of DE2903788A1 publication Critical patent/DE2903788A1/en
Withdrawn legal-status Critical Current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

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)
  • Measuring Fluid Pressure (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Testing Of Engines (AREA)

Description

R. ΡR. Ρ

IS.1.1979 Bt/HmIS.1.1979 Bt / Hm

ROBERT BOSCH GMBH3 7000 STUTTGART 1ROBERT BOSCH GMBH 3 7000 STUTTGART 1

Vorrichtung zur Erfassung der bei anomalen Verbrennungsvorgängen in Verbrennungsmotoren auftretenden Schwingungen Device for detecting the vibrations occurring during abnormal combustion processes in internal combustion engines

Stand der TechnikState of the art

Die Erfindung, geht aus von einer Vorrichtung nach der Gattung des Hauptanspruchs. Es ist bekannt, daß bei Verbrennungsmotoren unter bestimmten Betriebsbedingungen anomale Verbrennungsvorgänge wie z.B. das Klopfen auftritt. Unter Klopfen versteht man gedämpfte tonfrequente Schwingungen des komprimierten Arbeitsgases 3 die durch eine Stoßwelle bei einem schlagartigen Verbrennungsverlauf ausgelöst werden. Während dieser Schwingungen ist der Wärmeübergang am Kolben und Zylinderwand der Brennkraftmaschine stark erhöht s so daß die KolbenThe invention is based on a device according to the preamble of the main claim. It is known that abnormal combustion processes such as knocking occur in internal combustion engines under certain operating conditions. Knocking is understood to mean dampened sound-frequency vibrations of the compressed working gas 3 which are triggered by a shock wave in the event of a sudden combustion process. During these oscillations, the heat transfer to the piston and cylinder wall of the engine is greatly increased so that the pistons s

030033/0132 - 2 -030033/0132 - 2 -

leicht; klemmen oder fressen= Außerdem können durch die mechanischen Schwingungen Kolben und Triebwerk überlastet und die Lager ausgeschlagen werden» Mit Hilfe von Druckgeberηj die die Druckschwankungen registrieren oder Beschleunigungsmessers die die durch Druckschwankungen hervorgerufenen Schwingungen feststellen., werden über eine entsprechende Regelschaltung die Parameter der Brennkraftmaschine zur Vermeidung des Klopfen verändert .easy; jam or eat = In addition, the mechanical vibrations piston and engine are overloaded and the bearings are knocked out »With the help von Druckgeberηj which register the pressure fluctuations or accelerometer which is affected by pressure fluctuations determine the vibrations caused., the parameters the internal combustion engine changed to avoid knocking.

In der DE-AS 22 54 267 wird eine Vorrichtung zum Nachweisen anomaler Verbrennungsvorgänge beschrieben bei der der Meßwertwandler als Unterlegscheibe unter die Zylinderkopfschraube ausgebildet ist. Diese Vorrichtung hat aber den Nachteils, daß Störgeräusche z.B. durch Ventilschließen die Messung verfälschen können.In DE-AS 22 54 267 a device for detecting abnormal combustion processes described with the transducer as a washer under the Cylinder head screw is formed. This device has the disadvantage, however, that interfering noises, e.g. due to valve closing, can falsify the measurement.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Vorrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteils daß der Störabstand des Meßsignals wegen Vermeidung von Störgeräuschen durch Ventilschließen größer ist« Außerdem ändert sich das Meßsignal über die Lebensdauer des Motors nur wenigs da konstante Meßbedingungen am Meßort herrschen. Zusätzlich können die Signale des Meßwertwandlers gleichzeitig zur Überwachung der Kurbelwellenlager verwendet werden»The inventive apparatus having the characterizing features of the main claim has the advantage that the signal to noise ratio of the measurement signal is greater because of the avoidance of noise through valve closing "In addition, the measuring signal over the life of the engine changes only slightly s prevail because constant measuring conditions at the measurement location. In addition, the signals from the transducer can also be used to monitor the crankshaft bearings »

Zeichnungdrawing

In der Figur 1 ist eine Anordnung zur Erfassung der beim Klopfen einer Brennkraftmaschine auftretenden Schwingungen mit Hilfe von Meßwertwandlern dargestellt, Fig. 2 zeigt einen Befestigungsort des Meßwertwandlers an der Kurbelwelle. FIG. 1 shows an arrangement for detecting the vibrations that occur when an internal combustion engine knocks shown with the aid of transducers, Fig. 2 shows a mounting location of the transducer on the crankshaft.

030033/0132030033/0132

Beschreibung der ErfindungDescription of the invention

Die in der Figur dargestellte erfindungsgemäße Vorrichtung umfaßt einen Meßwertwandler 1, der als Druckaufnehmer, Beschleunigungsaufnehmer, Temperaturaufnehmer u.a. ausgebildet sein kann. Das beim Klopfen der Brennkraftmaschine vom Meßwertwandler 1 abgegebene Signal gelangt über eine Einrichtung zur Signalaufbereitung 2 zur Auswerteschalteinrichtung 3· Über eine Regelschaltung 4 werden z.B. die Zündungs- und/oder Einspritzparameter der Brennkraftmaschine mit dem Ziel geändert., Klopfen zu vermeiden.The device according to the invention shown in the figure comprises a transducer 1, which can be designed as a pressure sensor, acceleration sensor, temperature sensor, etc. That when the internal combustion engine knocks The signal emitted by the transducer 1 reaches the evaluation switching device via a device for signal conditioning 2 3 · Via a control circuit 4, e.g. the ignition and / or injection parameters of the internal combustion engine changed with the aim of avoiding knocking.

Der Meßwertwandler I3 der die durch die plötzliche Änderung des Drucks im Zylinder auftretenden Schwingungen mißt, wird erfindungsgemäß an der Kurbelwelle oder an kurbelwellennahen Teilen befestigt. Druckaufnehmer werden dabei zweckmäßiger/weise unter einem Zuganker (Lagerschraube) des Lagerdeckelsa in oder außerhalb der Lagerschale angeordnet oder mit dem Schmierölkreislauf nahe der Eintrittsöffnung in das Grundlager verbunden. Beschleunigungsaufnehmer können an oder unter einem Zuganker, an bzw. in einem Grundlager oder an oder in der Kurbelwelle befestigt werden. Meßwertwandler, die Verformungen registrierenj können an dem Lagerdeckel, am Schaft oder am, im oder auf dem Kopf des Zugankers angebracht sein. Ein weiterer Befestigungsort wird in Fig. gezeigt. Der Meßwertwandler 1 ist an der Kurbelwange angeordnet, wobei das Meßsignal über eine Meßleitung durch die Kurbelwelle 7 zum kupplungsabgewandten Ende der Kurbelwelle 7 auf einen Schleifkontakt 8 und von dort zur Weiterverarbeitung abgenommen wird.The transducer I 3, which measures the vibrations occurring as a result of the sudden change in pressure in the cylinder, is fastened according to the invention to the crankshaft or to parts close to the crankshaft. Pressure sensors are expediently arranged under a tie rod (bearing screw) of the bearing cap in or outside the bearing shell or connected to the lubricating oil circuit near the inlet opening in the base bearing. Accelerometers can be attached to or under a tie rod, to or in a base bearing, or to or in the crankshaft. Measuring transducers that register deformations can be attached to the bearing cover, to the shaft or to, in or on the head of the tie rod. Another attachment location is shown in FIG. The transducer 1 is arranged on the crank arm, the measurement signal being picked up via a measuring line through the crankshaft 7 to the end of the crankshaft 7 facing away from the clutch to a sliding contact 8 and from there for further processing.

030033/0132030033/0132

Claims (1)

23037882303788 κ. 5 2 7 2κ. 5 2 7 2 ROBERT BOSCH GMBH3 7OQO STUTTGART 1ROBERT BOSCH GMBH 3 7OQO STUTTGART 1 AnsprücheExpectations 1.JVorrichtung zur Erfassung der bei anomalen Verbren-"nungsvorgangen in Verbrennungsmotoren auftretenden Schwingungen., dadurch gekennzeichnet, daß der Druck in den Zylindern des Verbrennungsmotors durch mindestens einen an sich bekannten Meßx-rertwandler (1) an der Kurbelwelle (7) und/oder an die Kurbelwelle (7) umschließenden Teilen abgenommen wird.1.JVorrichtung for detecting of abnormal combustion "voltage vorgangen in internal combustion engines vibrations occurring., Characterized in that the pressure in the cylinders of the internal combustion engine by at least one known per se Meßx-rertwandler (1) to the crankshaft (7) and / or to the crankshaft (7) enclosing parts is removed. 2. Vorrichtung nach Anspruch I3 dadurch gekennzeichnet.;, daß mindestens ein Meßwertwandler (1) am Lagerdeckel mindestens eines Grundlagers befestigt ist.2. Apparatus according to claim I 3, characterized in that at least one transducer (1) is attached to the bearing cover of at least one base bearing. 3. Vorrichtung nach Anspruch ls dadurch gekennzeichnet, daß mindestens ein Meßwertwandler (1) im Lagerdeckel mindestens eines Grundlagers integriert ist.3. Apparatus according to claim l s, characterized in that at least one transducer (1) is integrated in the bearing cover of at least one base bearing. k. Vorrichtung nach Anspruch I3 dadurch gekennzeichnet, daß mindestens ein Meßwertwandler (1) am Kurbelgehäuse in der Nähe eines Grundlagers befestigt ist. k. Device according to Claim I 3, characterized in that at least one transducer (1) is attached to the crankcase in the vicinity of a base. — 2 ~- 2 ~ Ö30033/013IÖ30033 / 013I 5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß mindestens ein Meßwertwandler (1) an den Schmierölkreislauf in der Nähe des Eintritts in das Grundlager angeschlossen ist.5. Apparatus according to claim 1, characterized in that that at least one transducer (1) to the lubricating oil circuit near the entrance to the base camp connected. 6. "Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß mindestens ein Meßwertwandler (1) zwischen der Lagerschale mindestens eines Grundlagers und dem Lager angeordnet ist.6. "Device according to claim 1, characterized in that that at least one transducer (1) is arranged between the bearing shell of at least one base bearing and the bearing is. 7.Vorrichtung nach Anspruch I3 dadurch gekennzeichnet, daß mindestens ein Meßwertwandler (1) in mindestens einer Lagerschale eines Grundlagers integriert und damit Bestandteil mindestens einer Lagerschale ist.7.Vorrichtung according to claim I 3, characterized in that at least one transducer (1) integrated in at least one bearing shell of a base bearing and is thus part of at least one bearing shell. 8. Vorrichtung nach Anspruch I3 dadurch gekennzeichnet, daß mindestens ein Meßwertwandler (1) an oder unter mindestens einer Befestigungsschraube eines Grundlagers angeordnet ist.8. Apparatus according to claim I 3, characterized in that at least one transducer (1) is arranged on or under at least one fastening screw of a base. 9. Vorrichtung nach Anspruch I3 dadurch gekennzeichnet, daß mindestens ein Meßwertwandler (1) in eine Befestigungsschraube eines Grundlagers integriert ist.9. Apparatus according to claim I 3, characterized in that at least one transducer (1) is integrated in a fastening screw of a base. Ö30Ö53/0132Ö30Ö53 / 0132 52725272 10. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß mindestens ein Meßwertwandler (1) am kurbelwellenseitigen Ende des Zylinders angeordnet ist.10. The device according to claim 1, characterized in that at least one transducer (1) is arranged at the end of the cylinder on the crankshaft side. 11. Vorrichtung nach Anspruch I3 dadurch gekennzeichnet, daß mindestens ein Meßwertwandler (1) an einer Kurbelwange (5) und/oder in einem Kurbelzapfen angeordnet ist.11. The device according to claim I 3, characterized in that at least one transducer (1) is arranged on a crank web (5) and / or in a crank pin. 12. Vorrichtung nach Anspruch 11 3 dadurch gekennzeichnet, daß zur Abnahme des Meßsignals eine Meßleitung (6) vorgesehen ist, die durch die Kurbelwelle (7) auf einen Schleifkontakt (8) geführt ist.12. The device according to claim 11 3, characterized in that a measuring line (6) is provided for the acceptance of the measurement signal, which is guided through the crankshaft (7) to a sliding contact (8). 030033/0131030033/0131
DE19792903788 1979-02-01 1979-02-01 DEVICE FOR DETECTING THE VIBRATIONS WHICH APPEAR IN ANALOMIC COMBUSTION PROCESSES IN COMBUSTION ENGINES Withdrawn DE2903788A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19792903788 DE2903788A1 (en) 1979-02-01 1979-02-01 DEVICE FOR DETECTING THE VIBRATIONS WHICH APPEAR IN ANALOMIC COMBUSTION PROCESSES IN COMBUSTION ENGINES
FR8001098A FR2448142A1 (en) 1979-02-01 1980-01-18 INSTALLATION FOR SENSING THE VIBRATIONS GENERATED IN INTERNAL COMBUSTION ENGINES IN THE EVENT OF AN ABNORMAL COMBUSTION PROCESS
JP886480A JPS55136928A (en) 1979-02-01 1980-01-30 Apparatus for detecting vibration generated in abnormal combustion in internal combustion engine
IT19605/80A IT1129589B (en) 1979-02-01 1980-01-31 DEVICE TO DETECT THE VIBRATIONS THAT OCCUR IN THE EVENT OF ABNORMAL COMBUSTION PROCESSES IN ENDOTHERMAL ENGINES
GB8003532A GB2041524A (en) 1979-02-01 1980-02-01 Apparatus for detecting the vibrations occurring during abnormal combustion conditions in combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792903788 DE2903788A1 (en) 1979-02-01 1979-02-01 DEVICE FOR DETECTING THE VIBRATIONS WHICH APPEAR IN ANALOMIC COMBUSTION PROCESSES IN COMBUSTION ENGINES

Publications (1)

Publication Number Publication Date
DE2903788A1 true DE2903788A1 (en) 1980-08-14

Family

ID=6061901

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792903788 Withdrawn DE2903788A1 (en) 1979-02-01 1979-02-01 DEVICE FOR DETECTING THE VIBRATIONS WHICH APPEAR IN ANALOMIC COMBUSTION PROCESSES IN COMBUSTION ENGINES

Country Status (5)

Country Link
JP (1) JPS55136928A (en)
DE (1) DE2903788A1 (en)
FR (1) FR2448142A1 (en)
GB (1) GB2041524A (en)
IT (1) IT1129589B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598681A (en) * 1981-08-26 1986-07-08 Nissan Motor Co., Ltd. Automotive engine with knock sensor
EP0762101A1 (en) * 1995-08-28 1997-03-12 Jenbacher Energiesysteme Ag Identification of irregular working conditions of a combustion engine by revolution dependent torsional vibrations of the crankshaft

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59309259D1 (en) * 1993-09-09 1999-02-11 Waertsilae Nsd Schweiz Ag Device for determining the pressure in the cylinder of a reciprocating piston engine, and a diesel engine with such a device
JP2013083489A (en) * 2011-10-06 2013-05-09 Daihatsu Diesel Mfg Co Ltd Sensor unit for internal combustion engines and status monitoring device for internal combustion engines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393557A (en) * 1967-06-29 1968-07-23 Texaco Inc Apparatus for measuring selected engine vibration characteristics
DE2146361C3 (en) * 1970-09-22 1974-01-03 Snam Progetti S.P.A., Mailand (Italien) Device for measuring knocking in internal combustion engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598681A (en) * 1981-08-26 1986-07-08 Nissan Motor Co., Ltd. Automotive engine with knock sensor
EP0762101A1 (en) * 1995-08-28 1997-03-12 Jenbacher Energiesysteme Ag Identification of irregular working conditions of a combustion engine by revolution dependent torsional vibrations of the crankshaft

Also Published As

Publication number Publication date
FR2448142A1 (en) 1980-08-29
IT1129589B (en) 1986-06-11
GB2041524A (en) 1980-09-10
JPS55136928A (en) 1980-10-25
IT8019605A0 (en) 1980-01-31

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