EP1517086B1 - Bougie d'allumage avec un capteur de pression pour un moteur Diesel - Google Patents

Bougie d'allumage avec un capteur de pression pour un moteur Diesel Download PDF

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Publication number
EP1517086B1
EP1517086B1 EP04020923A EP04020923A EP1517086B1 EP 1517086 B1 EP1517086 B1 EP 1517086B1 EP 04020923 A EP04020923 A EP 04020923A EP 04020923 A EP04020923 A EP 04020923A EP 1517086 B1 EP1517086 B1 EP 1517086B1
Authority
EP
European Patent Office
Prior art keywords
heating element
plug body
pressure sensor
plug
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 - Lifetime
Application number
EP04020923A
Other languages
German (de)
English (en)
Other versions
EP1517086A1 (fr
Inventor
Michael Haussner
Ulf Wyrwich
Hans Houben
Frank Pechhold
Heinz-Georg Schmitz
Dirk Von Hacht
Marc Gerard Johan Borgers
Albert Ferdinand Zwijze
Paulus Thomas Johannes Gennissen
Ronald De Groot
Arie-Jan Kölling
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.)
BorgWarner Ludwigsburg GmbH
Sensata Technologies Holland BV
Original Assignee
Beru AG
Sensata Technologies Holland BV
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 Beru AG, Sensata Technologies Holland BV filed Critical Beru AG
Publication of EP1517086A1 publication Critical patent/EP1517086A1/fr
Application granted granted Critical
Publication of EP1517086B1 publication Critical patent/EP1517086B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • 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 Druckmessglühkerze for a diesel engine with a plug body for insertion into a cylinder of the diesel engine, a heating element, which is arranged in the plug body, and a pressure sensor, which is arranged under a bias voltage between the heating element and the plug body, such that the pressure sensor is acted upon by the pressure prevailing in the combustion chamber of the cylinder, which is transmitted from the heating element.
  • the purpose of such a Druckmessglühkerze is to provide on the one hand as a cold start aid for starting the diesel engine at low temperatures or for intermediate annealing in unfavorable operating conditions and on the other hand by the pressure sensor, the e.g. can consist of a piezoceramic or a strain gauge to obtain information about the combustion process in the cylinder, evaluate this and control the combustion process accordingly.
  • the use of such a Druckmessglühkerze results in a diesel engine, which is adjustable in terms of reducing the exhaust gases and consumption.
  • the problem underlying the invention is therefore to provide a Druckmessglühkerze of the type mentioned, which is designed so that the pressure transmission of the geometry and the strength of the plug body is independent and the signal for the pressure in the combustion chamber of the cylinder is not affected ,
  • heating element is slidably disposed in the axial direction slidably in the plug body and transmits the pressure in the combustion chamber of the cylinder to the pressure sensor.
  • the combustion pressure is transferred directly via the heating rod, without the geometry and the strength of the plug body having an influence or being involved. All the usual functions of the glow plug are retained.
  • FIG. 1 illustrated first embodiment of the Druckmessglühkerze according to the invention has a heating element 1, which is arranged in a plug body, which is formed of two parts, namely an upper or connection-side part 2.2 and a lower or combustion chamber-side part 2.1.
  • the heating element 1 has a reduced diameter in the connection-side region and is provided in this region with a membrane 7 which is fastened to the heating element 1.
  • the membrane 7 is designed so that it passes on the heat of the heating element 1 on the plug body 2, the earth connection ensures the operation of the pressure measuring glow in its annealing function and the arrangement in the direction of the connection side of the glow plug gas-tight.
  • the membrane 7 is firmly attached to the end face of the upper body part 2.1, for example by laser welding.
  • a contact tube 6 is provided which is fixed to the glow tube 1.1 of the heating element 1.
  • the inner pole 1.2 of the heating element 1 and the con tact tube 6 extend on the terminal side beyond the plug housing 2 addition, wherein in the connection-side part of the plug housing, an O-ring 4 is provided, the extension of the heating element 1 by means of Contact tube 6 centered in the upper part 2.2 of the candle body.
  • an O-ring 3 is likewise provided, which centers the heating element 1 with respect to the lower body part 2.1 of the plug body and seals so that the combustion pressure in the cylinder is transmitted only via the heating element 1 to the membrane 7.
  • the lower part 2.1, the upper part 2.2 of the plug body and the diaphragm 7 located therebetween are welded together, for example, by laser welding.
  • An O-ring 5 is provided at the connection-side end as a sealing element between the inner pole 1.2 and the contact tube 6.
  • a pressure sensor arrangement 9 is located on the front side on the connection side of the upper part 2.2 of the plug body and is isolated in contrast.
  • the sensor assembly 9 is under a bias between the plug body 2 and the contact tube 6.
  • a clamping element 10 may be provided, which is fastened in a suitable manner to the contact tube 6, for example screwed, welded or crimped.
  • the pressure measuring glow plug described above operates as follows in terms of its pressure measurement function:
  • the heating element 1 By lying on the heating element 1 pressure in the cylinder of the diesel engine, there is an axial displacement of the heating element 1 and the membrane 7 thus the contact tube 6 relative to the connection-side part 2.2 of the plug body 2.
  • This relative movement is transmitted to the biasing device, namely the clamping element 10 and causes a relief of the biased pressure sensor assembly 9, resulting in a charge or voltage change, which is an electronic Circuit can be detected and evaluated.
  • the bias of the sensor assembly 9 has the purpose to obtain a usable signal change in the sensor relief.
  • FIGS. 2A and 2B a second embodiment of Druckmessglühkerze invention is shown in two training variants, which has the same basic structure as that in Fig. 1 illustrated embodiment has.
  • the sensor assembly 9 insulating on a shoulder of the contact tube 6, as in Fig. 2A is shown, or on a fixed to the contact tube 6 support ring, as shown in Fig. 2B is shown or placed directly on the end of the contact tube 6 and braced with the clamping element 10 relative to the upper part 2.2 of the plug body.
  • the pressure stress on the heating element 1 due to the pressure prevailing in the cylinder increases the pressure load on the sensor arrangement 9, since the sensor arrangement 9 is pressed more strongly against the clamping element 10 clamped to the upper part 2.2 of the glow plug body.
  • the resulting change in the output signal of the sensor arrangement 9 can be evaluated in the same way as in the first embodiment.
  • Fig. 3A and 3B show a third embodiment of the Druckmessglühkerze invention, the basic structure of which corresponds to the basic structure of the first two embodiment, in the Fig. 1 and 2 are shown.
  • a sensor element 8, for example a strain gauge is in the in Fig. 3A illustrated embodiment on a defined in the axial direction flexible support member 9, for example, applied in the form of a cup membrane and fixed directly between the contact tube 6 and the upper part 2.2 of the plug body 2, for example by welding.
  • the sensor element for. B. the strain gauges attached radially.
  • a load or deformation on the sensor element is detected not only in the axial direction but also in the radial direction.
  • Fig. 4 shows an embodiment of the Druckmessglühkerze according to the invention, in which the plug body 2 is in one piece and at its combustion chamber end, a diaphragm 7 is fixed, which has the same function as the diaphragm 7 in the in Fig. 1 has illustrated embodiment.
  • the membrane 7 in the in Fig. 4 illustrated embodiment serves as a seal of the plug body or supplies the sealing surface for sealing the plug body due to its outer fixation relative to the cylinder head 20th
  • the plug body 2 is integrally formed, wherein the inner seal of the plug body 2 is achieved to the heating element 1 relative to the combustion chamber and from the outside via a combination of O-rings 3 and 4, and the O-ring 4 also serves to center the extended by the contact tube 6 heating rod 1.
  • a sliding element 12 is provided between the glow tube 1 and the plug body 2, which sits between the plug body 2 and the heating element 1.
  • the sliding element can also be arranged between the plug body 2 and the contact tube 6, and serves to guide the heating element 1 and to the main centering of the heating element 1 relative to the plug body 2.
  • Fig. 5A shows the variant in which the sensor arrangement deviates from the arrangement in Fig. 1 rests on a shoulder of the contact tube 6
  • Fig. 5B shows the variant in which the sensor arrangement rests on a ring which is fixed to the contact tube 6 of the heating element 1
  • Fig. 5C shows a variant with a sensor arrangement according to Fig. 3A ,
  • FIGS. 6A and 6B show a further embodiment of the invention Druckmessglühkerze, in its construction and its operation in the Fig. 5 illustrated embodiment corresponds, but missing the slider. Instead, the heating element 1 is floatingly mounted in the plug body 2 via the O-rings 3 and 4.
  • the highest force is introduced from the heating element 1 to the sensor element and thus the largest pressure change at the sensor element, resulting in a higher charge change depending on the applied pressure.
  • the heating element 1 is thus movably arranged in the plug body 2 via a diaphragm and / or O-rings, which reduces the pressures on the plug body resulting from the combustion in the combustion chamber of the cylinder. As a result, the candle body is released from the force curve by the combustion pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (9)

  1. Bougie d'allumage à mesure de pression pour un moteur diesel, avec
    - un corps de bougie (2) à mettre en place dans un cylindre du moteur diesel
    - une tige chauffante (1) disposée dans le corps de bougie (2), et
    - un capteur de pression (9), disposé sous précontrainte entre la tige chauffante (1) et le corps de bougie (2), de telle manière que la tige chauffante (1) transmet audit capteur de pression (9) la pression dans la chambre de combustion du cylindre,
    caractérisée en ce que
    - la tige chauffante (1) est disposée de manière à être mobile par coulissement dans le corps de bougie (2) en direction axiale au moyen d'une membrane (7) et/ou de joints toriques (3, 4), afin de réduire les pressions exercées sur le corps de bougie, dues à la combustion dans la chambre de combustion du cylindre.
  2. Bougie d'allumage à mesure de pression selon la revendication 1, caractérisée en ce que le corps de bougie (2) est formé de deux parties en direction axiale et en ce que la membrane (7) est réalisée comme membrane radiale, disposée entre les deux parties (2.1, 2.2) du corps de bougie et fixement raccordée à la tige chauffante (1).
  3. Bougie d'allumage à mesure de pression selon la revendication 1, caractérisée en ce que la membrane (7) est disposée sur le côté frontal du corps de bougie (2) côté chambre de combustion, et est fixement raccordée à la tige chauffante (1).
  4. Bougie d'allumage à mesure de pression selon la revendication 2, caractérisée en ce qu'un élément coulissant (12) est disposé entre la tige chauffante (1) et le corps de bougie (2).
  5. Bougie d'allumage à mesure de pression selon l'une des revendications précédentes, caractérisée en ce qu'un des joints toriques (3) est prévu côté chambre de combustion, entre le corps de bougie (2) et la tige chauffante (1).
  6. Bougie d'allumage à mesure de pression selon l'une des revendications précédentes, caractérisée en ce qu'un des joints toriques (4) est prévu côté connexion, entre le corps de bougie (2) et la tige chauffante (1).
  7. Bougie d'allumage à mesure de pression selon la revendication 1, caractérisée en ce que le capteur de pression (9) est disposé sous précontrainte entre la tige chauffante (1) et le corps de bougie (2), de telle manière que le capteur de pression (9) soit déchargé de la pression régnant dans la chambre de combustion du cylindre, transmise par la tige chauffante (1).
  8. Bougie d'allumage à mesure de pression selon la revendication 1, caractérisée en ce que le capteur de pression (9) est disposé entre la tige chauffante (1) et le corps de bougie (2), de telle manière que le capteur de pression (9) soit soumis à la pression régnant dans la chambre de combustion, transmise par la tige chauffante (1).
  9. Bougie d'allumage à mesure de pression selon la revendication 1, caractérisée par un élément support (9) flexible, appliqué contre le corps de bougie vers la connexion, et supportant un capteur (8) réagissant à la dilatation, la pression transmise par la tige chauffante (1) entraînant une dilatation de l'élément support (9) en direction axiale.
EP04020923A 2003-09-19 2004-09-02 Bougie d'allumage avec un capteur de pression pour un moteur Diesel Expired - Lifetime EP1517086B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10343521A DE10343521A1 (de) 2003-09-19 2003-09-19 Druckmessglühkerze für einen Dieselmotor
DE10343521 2003-09-19

Publications (2)

Publication Number Publication Date
EP1517086A1 EP1517086A1 (fr) 2005-03-23
EP1517086B1 true EP1517086B1 (fr) 2012-11-14

Family

ID=34177850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04020923A Expired - Lifetime EP1517086B1 (fr) 2003-09-19 2004-09-02 Bougie d'allumage avec un capteur de pression pour un moteur Diesel

Country Status (5)

Country Link
US (1) US7337657B2 (fr)
EP (1) EP1517086B1 (fr)
JP (1) JP4737589B2 (fr)
KR (1) KR101150851B1 (fr)
DE (1) DE10343521A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015205671A1 (de) 2015-03-30 2016-10-06 Robert Bosch Gmbh Brennraumdruckaufnehmer, Verbrennungskraftmaschine und Verfahren zur Messung eines Brennraumdrucks in einem Brennraum einer Verbrennungskraftmaschine

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DE10343521A1 (de) 2005-04-21
JP2005090954A (ja) 2005-04-07
US7337657B2 (en) 2008-03-04
KR101150851B1 (ko) 2012-06-13
US20050061063A1 (en) 2005-03-24
JP4737589B2 (ja) 2011-08-03
KR20050028877A (ko) 2005-03-23

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