EP1847777B1 - Bougie de préchauffage dotée d'un capteur de pression intégré - Google Patents

Bougie de préchauffage dotée d'un capteur de pression intégré Download PDF

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Publication number
EP1847777B1
EP1847777B1 EP07450039A EP07450039A EP1847777B1 EP 1847777 B1 EP1847777 B1 EP 1847777B1 EP 07450039 A EP07450039 A EP 07450039A EP 07450039 A EP07450039 A EP 07450039A EP 1847777 B1 EP1847777 B1 EP 1847777B1
Authority
EP
European Patent Office
Prior art keywords
glow plug
pressure sensor
combustion chamber
pressure
measuring
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.)
Not-in-force
Application number
EP07450039A
Other languages
German (de)
English (en)
Other versions
EP1847777A2 (fr
EP1847777A3 (fr
Inventor
Alexander Schricker
Alexander Friedl
Michael Hirschler
Dietmar KRÖGER
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.)
Piezocryst Advanced Sensorics GmbH
Original Assignee
Piezocryst Advanced Sensorics 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 Piezocryst Advanced Sensorics GmbH filed Critical Piezocryst Advanced Sensorics GmbH
Publication of EP1847777A2 publication Critical patent/EP1847777A2/fr
Publication of EP1847777A3 publication Critical patent/EP1847777A3/fr
Application granted granted Critical
Publication of EP1847777B1 publication Critical patent/EP1847777B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F23Q2007/002—Glowing plugs for internal-combustion engines with sensing means

Definitions

  • the invention relates to a glow plug with integrated pressure sensor for measuring the pressure in the combustion chamber of an internal combustion engine, wherein the housing of the glow plug has an incandescent filament receiving, combustion chamber side region with reduced diameter, which ends in a protruding into the combustion chamber tip, wherein the pressure sensor in the radial Direction can be acted upon with pressure and uncooled in the combustion chamber side region of the glow plug and the filament of the glow plug is guided past the pressure sensor to the top of the glow plug.
  • An essential variable for the assessment of the combustion process in the combustion chamber of an internal combustion engine is the pressure prevailing in the combustion chamber. Efforts are therefore made to make the combustion chamber accessible to pressure measurement in order to accomplish pressure-controlled engine control. Since it is not economical to accomplish a further bore or passage to the combustion chamber for the pressure measurement, it is desirable to make any changes to the combustion chamber geometry, so that existing holes for the spark plug or the glow plug are used for the pressure measurement.
  • a device in which the spark plug is additionally used for the pressure measurement function for example, from AT 402.116 B known.
  • this measuring device an annular pressure measuring element is provided, on which the insulating body of the spark plug is supported against the plug housing.
  • the pressure applied to the spark plug is transmitted to the annular sensing element, a major drawback of this type of pressure sensing being that a relatively large mass, namely the insulating body of the spark plug, has a negative impact on the pressure measurement.
  • a Druckmessglühkerze for a diesel engine which has a heating element in the plug body, and a pressure sensor which generates a pressure corresponding to the pressure in the combustion chamber of the cylinder, which pressure is transmitted via the plug body or the heating element.
  • the pressure sensor is arranged in the plug body between this and the heating element, or its inner pole, so that it is loaded by the transmitted pressure.
  • a glow plug which receives an incandescent filament in its housing, wherein a thin-film pressure sensor is arranged in the combustion chamber side region of the glow plug.
  • the filament of the glow plug leads past the pressure sensor to the top of the glow plug.
  • Another pressure measuring device which is integrated in a glow plug, is from the EP 1 096 141 A2 in which a pressure sensor is arranged between the housing and the glow plug of a glow plug guided in the housing and is located in the cool region of the glow plug facing away from the combustion chamber.
  • the disadvantage is that relatively large masses must be moved in the pressure measurement, which has a negative impact on the pressure measurement signal.
  • the spark plug is formed with a continuous, off-center in the housing of the spark plug Provided longitudinal bore, which is slightly inclined to the spark plug and a pressure measuring device receives, the pressure measuring element is arranged close to the combustion chamber.
  • the housing diameter of such arrangements is relatively large, so that use in a Glühwbohrung is not possible.
  • Pressure sensors can also be used with a suitable adapter in glow plug bores of internal combustion engines, as a design according to the prior art (see Fig. 1 ) shows.
  • the pressure sensor 2 is used to measure the pressure in the combustion chamber 3 of an internal combustion engine with the aid of a glow plug adapter 11 in a glow plug bore 4.
  • the uncooled pressure sensor 2 is located in the front part of the housing 6 and is acted upon via a sensor membrane 12 with the pressure prevailing in the combustion chamber.
  • the adapter 11 has a projecting into the combustion chamber 3 top 10, which corresponds to the outer contour of a glow plug or a glow plug.
  • gas exchange channels 13 are arranged, via which the sensor membrane 12 is in communication with the pressure prevailing in the combustion chamber 3 of the internal combustion engine.
  • the glow plug adapter 11, in which the pressure sensor 2 is installed in a front-sealing manner, has a sealing cone 7, which bears sealingly against the sealing seat 5 of the glow plug bore 4.
  • the force is applied to the measuring element 2 parallel to the axis 1 'on the one hand via the sensor membrane 12 and on the other hand via the adapter housing 6 on the opposite side.
  • the glow plug adapter can not take over the function of a glow plug, since its tip is not heated and thus a deviating from the real conditions measurement situation is created.
  • the object of the invention is to improve a glow plug with integrated pressure sensor for measuring the pressure in the combustion chamber of an internal combustion engine such that their function and external shape remain unchanged, with a combustion chamber near mounting of the pressure sensor, short indexing and low masses to be moved are desirable.
  • a piezoelectric pressure sensor is disposed in a continuous, radial opening or bore of the combustion chamber side region of the glow plug between two opposing membranes, wherein the filament is passed to the piezoelectric pressure sensor over to the top of the glow plug.
  • the piezoelectric pressure sensor is sealed at both ends with a membrane.
  • the two diaphragms define the main pressure direction to the measuring elements in the pressure sensor, the rest of the sensor housing is used to fix the measuring elements, and the charge dissipation and prevents the measuring elements are pressurized on all sides.
  • the pressure sensor according to the invention is preferably cylindrical, and has two opposite membranes, which in turn initiate force into the piezoelectric measuring elements when pressure is applied.
  • the membranes need not necessarily be made of metal, but may also be made of glass, sapphire glass or ceramic and are preferably connected directly to the measuring element.
  • the cylindrical tube encloses the measuring element in the form that a pressure prevailing on all sides does not reach the lateral surfaces of the measuring element via the lateral surfaces, but can be introduced mainly via the membrane lying on the end surfaces along the axial direction of the tube.
  • the measuring element is preferably oriented so that the resulting polarization upon pressurization can be tapped over the side surfaces. These side surfaces in turn are in contact with electrodes, wherein either both electrodes can be contacted via their own signal leads, or an electrode can be in contact with the housing of the glow plug.
  • a piezoelectric measuring element made of a high-temperature-stable material, for example, GaPO 4 , or based on thin-film technology is used according to the invention.
  • the in the Fig. 2 to Fig. 4 illustrated glow plug 1 has an integrated pressure sensor 2, wherein the function of the glow plug is completely retained.
  • the pressure sensor 2 is used to measure the pressure in the combustion chamber 3 of an internal combustion engine, not shown, wherein the glow plug 1 is inserted into a glow plug hole 4, which has a conical sealing seat 5.
  • the housing 6 of the glow plug 1 then has a slender, combustion-chamber-side region 9 with a diameter ⁇ 5 mm on a sealing cone 7 cooperating with the sealing seat 5.
  • the combustion chamber-side region 9 ends in the rounded tip 10 of the glow plug 1, which protrudes a small distance into the combustion chamber 3.
  • a piezoelectric pressure sensor 2a is used, which is arranged uncooled in the combustion chamber side region 9 of the glow plug 1.
  • the pressure sensor 2 a is pressurized in the radial direction, ie, normal to the axis 1 'of the glow plug 1, with the incandescent filament 8 of the glow plug 1 being led past the pressure sensor 2 a to the tip 10 of the glow plug 1.
  • the piezoelectric pressure sensor 2 a is arranged in a continuous, radial bore 16 of the combustion chamber-side region 9 of the glow plug 1 between two opposing membranes 14.
  • the filament 8 can - as in detail from the FIG. 3 and FIG. 4 recognizable - be performed on the piezoelectric pressure sensor 2a over to the tip 10 of the glow plug. This results in a very compact structure, which has a diameter ⁇ 5 mm in the region of the pressure sensor.
  • the piezoelectric pressure sensor 2a consists essentially of a closed at both ends by the membranes 14 measuring tube 15, which in the radial bore 16 is inserted and its longitudinal axis 15 'is normal to the longitudinal axis 1' of the glow plug.
  • Two or more plate-shaped measuring elements 17 may be arranged between the membranes 14, wherein the narrow sides of the measuring elements 17 are in contact with the membranes 14 by utilizing the transverse piezoelectric effect.
  • a plurality of disk-shaped measuring elements are arranged as the measuring element stack in the measuring tube 15.
  • a flat discharge electrode 18 is arranged between the pairs of piezoelectric measuring elements 17, whereby at least one signal discharge 19 takes place through an opening 20 in the casing of the measuring tube 15.
  • the second sides of the measuring elements 17 are connected via spring elements 27 with the measuring tube 15 and therefore with the plug housing 6 in electrically conductive connection. It is also possible to provide 17 signal leads for both electrodes of the measuring elements.
  • the charge dissipation is preferably carried out in the interior of the glow plug 1, protected by a thin guide tube 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)

Claims (5)

  1. Bougie de préchauffage (1) intégrant un capteur de pression (2) pour mesurer la pression dans la chambre de combustion (3) d'un moteur à combustion interne,
    - le boîtier (6) de la bougie de préchauffage (1) ayant une zone (9), côté chambre de combustion, recevant la spire incandescente (8), et ayant un diamètre réduit qui se termine par une pointe (10) débouchant dans la chambre de combustion (3),
    - le capteur de pression (2a, 2b, 2c) étant installé de façon à pouvoir être sollicité par la pression dans la direction radiale et sans être refroidi dans la zone côté chambre de combustion (9) de la bougie de préchauffage (1), et
    - la spire incandescente (8) de la bougie de préchauffage (1) étant guidée sur le capteur de pression (2a), vers la pointe (10) de la bougie de préchauffage (1),
    bougie de préchauffage caractérisée par
    un capteur de pression piézo-électrique (2a) installé dans un perçage radial traversant (16) de la zone (9), côté chambre de combustion de la bougie de préchauffage (1), entre deux membranes (14) opposées.
  2. Bougie de préchauffage (1) selon la revendication 1,
    caractérisée en ce que
    le capteur de pression piézo-électrique (2a) comporte aux deux extrémités, un petit tube de mesure (15) fermé par une membrane (14) et logé dans un perçage radial (16) et son axe longitudinal (15') étant perpendiculaire à l'axe longitudinal (1') de la bougie de préchauffage, et
    au moins un élément de mesure piézo-électrique (17) est installé entre les membranes (14).
  3. Bougie de préchauffage (1) selon la revendication 2,
    caractérisée en ce que
    deux ou plusieurs éléments de mesure (17) en forme de plaquettes sont installés entre les membranes (14), et
    les petits côtés des éléments de mesure (17) sont en contact avec les membranes (14) pour utiliser l'effet piézo-électrique transversal.
  4. Bougie de préchauffage (1) selon la revendication 3,
    caractérisée en ce que
    des électrodes de sortie (18), surfaciques, sont installées entre les éléments de mesure piézo-électriques (17) montés par paires, et
    * au moins une sortie de signal (19) se fait à travers une ouverture (20) de l'enveloppe du petit tube de mesure (15).
  5. Bougie de préchauffage (1) selon l'une des revendications 2 à 4,
    caractérisée en ce que
    l'élément de mesure piézo-électrique (17) est en un matériau très réfractaire par exemple en GaPO4.
EP07450039A 2006-04-20 2007-03-01 Bougie de préchauffage dotée d'un capteur de pression intégré Not-in-force EP1847777B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0067106A AT503662B1 (de) 2006-04-20 2006-04-20 Glühkerze mit integriertem drucksensor

Publications (3)

Publication Number Publication Date
EP1847777A2 EP1847777A2 (fr) 2007-10-24
EP1847777A3 EP1847777A3 (fr) 2008-05-28
EP1847777B1 true EP1847777B1 (fr) 2011-05-25

Family

ID=38255351

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07450039A Not-in-force EP1847777B1 (fr) 2006-04-20 2007-03-01 Bougie de préchauffage dotée d'un capteur de pression intégré

Country Status (3)

Country Link
US (1) US7350494B2 (fr)
EP (1) EP1847777B1 (fr)
AT (2) AT503662B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010037476A1 (de) * 2010-09-10 2012-03-15 Borgwarner Beru Systems Gmbh Druckmessgerät

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004011098A1 (de) * 2004-03-06 2005-09-22 Robert Bosch Gmbh Vorrichtung zur Erfassung des Brennraumdrucks bei einer Brennkraftmaschine
DE102004045383A1 (de) * 2004-09-18 2006-03-23 Robert Bosch Gmbh Glühkerze mit Brennraumdrucksensor
DE102006008639A1 (de) * 2005-12-23 2007-06-28 Robert Bosch Gmbh Glühstiftkerze
JP2007309916A (ja) * 2006-04-20 2007-11-29 Denso Corp 燃焼圧センサ
DE102006057627A1 (de) * 2006-12-05 2008-06-12 Robert Bosch Gmbh Druckmesseinrichtung
DE102007012060A1 (de) * 2007-03-13 2008-09-18 Robert Bosch Gmbh Sensoranordnung zur Druckmessung
DE102008017110B3 (de) * 2008-04-02 2009-09-10 Beru Ag Druckmessglühkerze
DE102008020510B4 (de) * 2008-04-23 2010-02-11 Beru Ag Vorrichtung und Verfahren zur Ermittlung des Brennraumdruckes
US20100078421A1 (en) * 2008-10-01 2010-04-01 Federal-Mogul Italy Sr1 Glow plug adn heater assembly therefor with an improved connection between a central electrode and a heater probe of the heater assembly
AT507198B1 (de) * 2008-11-04 2010-03-15 Piezocryst Advanced Sensorics Kraftmessring mit einem ringförmigen gehäuse
US8857249B2 (en) 2011-08-22 2014-10-14 BorgWarner BERU Systems, GmbH Dual diaphragm combustion pressure measuring device
JP6302715B2 (ja) * 2014-03-26 2018-03-28 日本特殊陶業株式会社 ディーゼルエンジンの制御装置およびその方法
JP6320209B2 (ja) * 2014-07-15 2018-05-09 日本特殊陶業株式会社 ディーゼルエンジンの制御装置およびその制御方法

Citations (1)

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EP1530037A1 (fr) * 2002-08-09 2005-05-11 Bosch Automotive Systems Corporation Capteur de pression, procede de production dudit capteur et structure de detection de la pression dans le cylindre d'un moteur a combustion interne

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US4064549A (en) * 1976-08-31 1977-12-20 Metrolology General Corporation Cylindrical capacitive quartz transducer
AT399588B (de) 1991-12-16 1995-06-26 Avl Verbrennungskraft Messtech Drucksensor
AT402116B (de) * 1994-12-19 1997-02-25 Avl Verbrennungskraft Messtech Zündkerze mit einem kraftmesselement zur messung des an der zündkerze anliegenden druckes
AT407577B (de) * 1999-08-05 2001-04-25 Avl List Gmbh Zündkerze mit einer druckmesseinrichtung
JP3911930B2 (ja) * 1999-10-28 2007-05-09 株式会社デンソー 燃焼圧センサ付きグロープラグ
DE10346330B4 (de) * 2003-10-06 2005-09-22 Beru Ag Druckmessglühkerze für einen Dieselmotor
US20050098136A1 (en) * 2003-11-10 2005-05-12 Visteon Global Technologies, Inc. Architecture to integrate ionization detection electronics into and near a diesel glow plug
DE102004002905B4 (de) * 2004-01-20 2006-05-18 Beru Ag Glühkerzenstecker
DE102004012673A1 (de) * 2004-03-16 2005-10-06 Robert Bosch Gmbh Glühstiftkerze mit elastisch gelagertem Glühstift
JP2005344943A (ja) * 2004-05-31 2005-12-15 Toyota Central Res & Dev Lab Inc グロープラグ
DE102004047143A1 (de) * 2004-09-29 2006-04-06 Robert Bosch Gmbh Piezoelektrischer Brennraum-Drucksensor mit einem Druckübertragungsstift
JP4903165B2 (ja) * 2005-02-24 2012-03-28 キストラー ホールディング アクチエンゲゼルシャフト 電気絶縁皮膜によって保持された圧電式力センサ用部品又は圧電式圧力センサ用部品
US7214908B2 (en) * 2005-07-28 2007-05-08 Wlodarczyk Marek T Glow plug integrated pressure sensor with filter trap

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
EP1530037A1 (fr) * 2002-08-09 2005-05-11 Bosch Automotive Systems Corporation Capteur de pression, procede de production dudit capteur et structure de detection de la pression dans le cylindre d'un moteur a combustion interne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010037476A1 (de) * 2010-09-10 2012-03-15 Borgwarner Beru Systems Gmbh Druckmessgerät
DE102010037476B4 (de) * 2010-09-10 2012-04-26 Borgwarner Beru Systems Gmbh Druckmessgerät

Also Published As

Publication number Publication date
AT503662A4 (de) 2007-12-15
AT503662B1 (de) 2007-12-15
US20070245805A1 (en) 2007-10-25
EP1847777A2 (fr) 2007-10-24
EP1847777A3 (fr) 2008-05-28
ATE511064T1 (de) 2011-06-15
US7350494B2 (en) 2008-04-01

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