EP1050716A1 - Glühkerze und Verfahren zur Herstellung derselben - Google Patents
Glühkerze und Verfahren zur Herstellung derselben Download PDFInfo
- Publication number
- EP1050716A1 EP1050716A1 EP00108176A EP00108176A EP1050716A1 EP 1050716 A1 EP1050716 A1 EP 1050716A1 EP 00108176 A EP00108176 A EP 00108176A EP 00108176 A EP00108176 A EP 00108176A EP 1050716 A1 EP1050716 A1 EP 1050716A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating element
- glow plug
- area
- insulated
- inner pole
- 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.)
- Granted
Links
Images
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
-
- 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
- F23Q2007/004—Manufacturing or assembling methods
-
- 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
- F23Q2007/004—Manufacturing or assembling methods
- F23Q2007/007—Manufacturing or assembling methods ion current sensors
Definitions
- the invention relates to glow plugs that have a heating element have an inner pole with glow and possibly control element (s), the heating rod opposite the glow plug body is electrically insulated, and methods of manufacture of these glow plugs.
- glow plugs a metal heating element with an internal inner pole and with metal glow plug body so that a heat-resistant between the heating rod wall and the glow plug body electrical insulation in the form of a glass melt is introduced.
- the glow plug body made of metal and the heating element made of metal with their respective Connection and located between the glow plug body and heating element Glass tubes placed in a graphite mold and heated in an oven until the glass melts. The connections become electrical against each other through ceramic tubes isolated. After the glass has cooled and solidified the glow plug body against the heating element and the connections fixed in isolation. With this complex manufacturing process the treatment must be carried out in an oven, whereby under among other things, the use of heat-resistant materials is also necessary is. Construction precision and functional quality are with this Procedure can not be easily guaranteed because for example, the distortion of the components during the process is possible.
- the technical effort just described Creation of glow plugs of this kind corresponds to the economic one Expenditure.
- the heating element made of ceramic material; this must be done in one multi - stage manufacturing process, for special tools and Devices are necessary to connect the ceramic to the heating element shaped, assembled, burned and ground.
- the ceramic heating element must have a support tube can be connected and only then in a conventional Assembly can be built into a finished glow plug.
- the invention is based, bypassing the task one of the disadvantages known from the prior art
- To provide glow plugs, which are usually below Avoidance of special, expensive and complex manufacturing processes can be produced, a relatively large, defined electrode provides high design precision and has functional quality and, especially when combined Use to improve ion current measurement and leads to more reliable measurement signals.
- Figure 1 has the embodiment shown a conventional glow plug body of the glow plug according to the invention 1, however, made of heat-resistant, electrically not conductive plastic material and with a usual Heating rod 2 made of metal, which in the usual way with an internal Inner pole (not shown) and related Heating and possibly control elements is provided.
- the press-fit area of the body 1 on the heating element 2 can have grooves, notches, etc. formed in the heating element 2 be in the corresponding ridges, etc. of the body 1 intervention.
- This glow plug according to the invention can for example, by pressing in the usual heating element 2 in the plastic body 1 or by overmolding the heating element 2 with the plastic mass for the body 1.
- connections 3, 4 with inner pole or heating element wall are used as cable connections from the connection-side end area the glow plug led out.
- the embodiment according to FIG. 2 has a body 1 made of metal and a conventional heating element 2; between the Outer wall of the heating element 2 and the hole for the heating element 2 in body 1 is plastic insulation 5, for example made of thermoplastic or thermosetting insulating and heat-resistant material, wherein in the inner wall of the heating element bore in body 1 and / or on the outer wall of the heating element 2 preferably grooves or Grooves are provided, in which the plastic material in particular then penetrates when the hardening of the material in the annular gap between body 1 and heating element 2 with pre-assembled Unit consisting of heating element 2 and body 1.
- plastic insulation 5 for example made of thermoplastic or thermosetting insulating and heat-resistant material, wherein in the inner wall of the heating element bore in body 1 and / or on the outer wall of the heating element 2 preferably grooves or Grooves are provided, in which the plastic material in particular then penetrates when the hardening of the material in the annular gap between body 1 and heating element 2 with pre-assembled Unit consisting of heating element 2
- the plastic in the contact area to the body 1 Heating rod 2 or on the inner wall of the heating rod bore in Body 1 are applied, whereupon heating element 2 and Body 1 by reducing, pressing in or drawing in with each other be firmly connected. It can also be beneficial be to cover the sealing seat 1a with the insulation 5, so that the insulation 5 after installing the candle additionally is fixed between candle body 1 and cylinder head.
- the Insulation 5 preferably consists of temperature-resistant Plastic with good sealing properties such as Teflon or Vespel.
- the embodiment of the glow plug according to the invention 3 has a separate ion current measuring sleeve 6, which protrudes into the combustion area and both against the body 1 by insulation 5 as well as against the heating element 2 is electrically isolated by insulation 7.
- the connection the wall of the heating element 2 takes place via connection 4 in Pipe shape, with an O-ring 8 insulated against the inner pole 3.
- the body 1 is, for example, together with the ion current measuring sleeve 6 and the tubular outer pole 4 in one Injection mold fixed, then in the insulating plastic material, for example a suitable resin or thermoplastic, is introduced so that this then next to the mechanical fixation the insulation 5 of the ion current measuring sleeve 6 against the body 1 also the insulation 5 of the ion current measuring sleeve 6 represents against the tubular outer pole 4.
- the ion current measuring sleeve 6 is perforated, so that the plastic mass penetrate into all areas or the trapped air can escape.
- the heating element 2 can then pull in, reduce or roll with the Ion current measuring sleeve 6 are firmly connected.
- the insulation the ion current measuring sleeve 6 with respect to the heating element 2 is through which ensures, for example, ceramic coating 7.
- FIG. 4 reproduced, which corresponds to that according to FIG. 3, however, the tubular contact tube 4 as the outer pole omitted, and the tubular heating rod wall as Outer pole connecting element 9 is led out of the body.
- Figure 5 gives another embodiment of the invention again, being a partial, electrically insulating ceramic coating 7 on the exiting from the body 1 Range of Schuffles 2 to, for example, about 5 mm is applied below its head end; this head area, which represents the actual ignition range by covering during coating of coating be kept free.
- This creates a defined ion current electrode formed in the head area of the heating element 2, which together with the counter electrode, which is usually the Mass of the connected cylinder head is a defined one electric field forms in its sphere of influence Ion current can be detected.
- This "shaping" of the electrical Field can be attached by, for example, a formed as a ring shaped body 10, the head of the heating element 2 is supported. Alternatively such an overmolding can also be used as an integral overmolding of the front region of the heating element 2 his.
- FIG. 6 shows a new type of connection, in particular for glow plugs according to the invention, reproduced at the connection of the heating element 2 via a contact tube 4 takes place, this contact tube 4 in a bore of the End region of the heating element 2 is introduced; in conclusion an O-ring 8 is provided in the interior of the heating element 2, which together with the contact tube 4 in the connection side End area of the heating element 2 used or reduced becomes.
- a contact tube 4 for example by pulse welding, concentrically on the End face of the connection-side end area of the heating element 2 fixed; is between the contact tube 4 and the inner pole 3 Insulation 11 in the form of an insulating tube or an insulating compound, for example MgO provided; the O-ring 8 in turn insulates and fixes the inner pole 3 in relation to the heating element 2 and simultaneously seals the interior of the heating element 2.
- a two- or multi-pin plug can be used 12 over the one secured with a nut 13 - already standard installed - screw connection 14 with a glow plug be connected in which the connection of the inner pole 3 as a conventional inner pole with thread and the Connection of the heating element 2 as projecting beyond the body 1 Metal tube is formed with a collar.
- FIG. 9 another embodiment of the glow plug according to the invention an insulating, heat-resistant Layer 7, for example made of ceramic, in the area of the the. Combustion chamber protruding part of the heating element 2 and closes preferably to the insulation 5 between the heating element 2 and the body 1 on.
- this layer covers the heating rod tip, for example over a range of approximately 5 to 10 mm, insofar as it forms the actual ignition area, not.
- Measurement signals, e.g. with respect to the ion current can from that uninsulated tip area of the heating rod 2, the actual ignition area forms, taken over the cylinder head become; in this area the soot is caused by the Ambient temperature or the heating element temperature during glow operation burned down.
- a catalytic Layer 20 applied, which burns off the soot layer in catalyzes this heating element area of lower temperature;
- suitable components of such a catalytic layer 20 can be platinum or palladium or their heat resistant Compounds or alloys.
- An arrangement according to the invention according to FIG. 11 has a glow plug according to the invention, the candle in a cylinder head 22 made of ceramic or another insulating temperature-resistant material is arranged and the ion current between heating element 2 and Injector 23 can be measured.
- the advantages of the invention are simple Manufacturing processes suitable for mass production and can be integrated into the usual production; the Glow plugs according to the invention are characterized by low Shape and bearing deviations of the components, especially the Inner poles, the various components and building materials such as sealing components and insulating materials the different Operating temperatures of the respective glow plug area can be adjusted; at the same time put the Glow plugs according to the invention in their combustion chamber side Area of an insensitive, large-area electrode for Available with more accurate and reliable ion current measurement signals are achievable. At the same time they allow tubular trained coaxial connections simple connections, in particular the inner pole.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
Abstract
Description
Claims (13)
- Glühkerze mit einem Heizstab, in den ein Innenpol, verbunden mit Heiz- und ggf. Regelelementen, führt, und einem Außenpol, wobei der Außenpol die Wandung des von anliegenden Bauteilen des Kerzenkörpers elektrisch isolierten Heizstabes (2) ist, dadurch gekennzeichnet, daß der Körper (1) aus elektrisch isolierendem Kunststoffmaterial besteht.
- Glühkerze nach Anspruch 1, dadurch gekennzeichnet, daß die elektrische Isolierung (5) im Preßsitzbereich zwischen Körper (1) und Heizstab (2) in Form einer Beschichtung aus elektrisch isolierendem Kunststoff auf dem Heizstab (2) oder auf der am Heizstab (2) anliegenden Bohrungswandung des Körpers (1) ausgebildet ist.
- Glühkerze nach Anspruche 1 oder 2, dadurch gekennzeichnet, daß im anschlußseitigen Bereich der elektrische Anschluß an die Wandung des Heizstabes (2) durch einen Rohrabschnitt (4) als Kontaktrohr erfolgt, dessen eines Ende in einer angepaßten Ausbohrung im Endbereich der Heizstabwandung angeordnet ist, wobei ein O-Ring (8) den Innenraum des Heizstab (2) abdichtet und gleichzeitig das Kontaktrohr (4) gegen den Innenpol (3) elektrisch isoliert.
- Glühkerze nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß im anschlußseitigen Endbereich des Heizstabes (2) ein Kontaktrohr (4) beispielsweise durch Punktschweißung fixiert ist, das gegenüber den sich durch das Kontaktrohr erstreckenden Innenpol durch eingebrachtes elektrisch isolierendes Material (11) elektrisch isoliert ist, wobei ggf. ein O-Ring (8) zur Abdichtung des Innenraumes des Heizstabes (2) und zur elektrisch isolierenden Positionierung des Innenpols (3) vorgesehen ist.
- Glühkerze nach mindestens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß eine separate Ionenstrommeßhülse (6) konzentrisch um den in den Brennraum ragenden Bereich des Heizstabes (2) vorgesehen ist, die sowohl gegen den Körper (1) als auch gegen den Heizstab (2) isoliert ist, wobei bevorzugt die Isolierung gegen den Heizstab (2) auf dem Anlagebereich der Ionenstrommeßhülse (6) am Heizstab (2) als Beschichtung aus hitzebeständigem, elektrisch isolierendem Kunststoffmaterial oder Keramik ausgebildet ist.
- Glühkerze nach mindestens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der in den Brennraum ragende Bereich des Heizstabes (2), ausschließlich der Heizstabspitze als Zündbereich, mit einem hitzbeständigen elektrisch isolierenden Kunststoff- oder Keramikmaterial (7), beschichtet ist.
- Glühkerze nach mindestens einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der in den Brennraum ragende Bereich des Heizstabes (2) ausschließlich der Heizstabspitze als Zündbereich, mit einer Schicht (20) versehen ist, die katalytisches Material zur Verhinderung der Bildung einer Rußschicht enthält oder daraus besteht.
- Verfahren zur Herstellung einer Glühkerze mit isoliertem Heizstab, dadurch gekennzeichnet, daß der Heizstab (2) mit einem Körper (1) durch Umspritzen mit elektrisch isolierendem Kunststoffmaterial verbunden wird.
- Verfahren zur Herstellung einer Glühkerze mit isoliertem Heizstab, dadurch gekennzeichnet, daß der Heizstab (2) in einem vorgefertigten Kunststoffkörper (1) eingepreßt wird.
- Verfahren zur Herstellung einer Glühkerze mit isoliertem Heizstab, dadurch gekennzeichnet, daß man in den Ringspalt zwischen Heizstab (2) und Körper (1) aus Metall elektrisch isolierenden Kunststoff einbringt.
- Verfahren zur Herstellung einer Glühkerze mit isoliertem Heizstab nach Anspruch 10, dadurch gekennzeichnet, daß man den Kunststoff flüssig oder pulverförmig einbringt und aushärtet.
- Verfahren zur Herstellung einer Glühkerze mit isoliertem Heizstab nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, daß man den Anschluß zum Glühkerzenkörper durch ein Kontaktrohr (4) herstellt, das mit einem zwischenliegenden O-Ring (8) am Innenpol (3) anliegt.
- Verfahren zur Herstellung einer Glühkerze mit isoliertem Heizstab nach Anspruche 12, dadurch gekennzeichnet, daß die Isolierung zwischen Innenpol (3) und Körper (1) im anschlußseitigen Bereich durch O-Ring (8) erfolgt, während man das Kontaktrohr (4) am anschlußseitigen Endbereich des Körpers (1) durch beispielsweise Impulsschweißen fixiert und zwischen Kontaktrohr (4) und Innenpol (3) eine Isolierung (11) in Form eines O-Rings oder einer Isoliermasse, wie MgO, einbringt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19920758A DE19920758C1 (de) | 1999-05-05 | 1999-05-05 | Glühkerze und Verfahren zur Herstellung derselben |
DE19920758 | 1999-05-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1050716A1 true EP1050716A1 (de) | 2000-11-08 |
EP1050716B1 EP1050716B1 (de) | 2003-08-13 |
Family
ID=7907106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00108176A Expired - Lifetime EP1050716B1 (de) | 1999-05-05 | 2000-04-13 | Glühkerze und Verfahren zur Herstellung derselben |
Country Status (7)
Country | Link |
---|---|
US (1) | US6255626B1 (de) |
EP (1) | EP1050716B1 (de) |
JP (1) | JP2000337633A (de) |
KR (1) | KR100708292B1 (de) |
AT (1) | ATE247257T1 (de) |
DE (2) | DE19920758C1 (de) |
ES (1) | ES2204391T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007073959A1 (de) * | 2005-12-23 | 2007-07-05 | Robert Bosch Gmbh | Glühstiftkerze |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19920766C1 (de) * | 1999-05-05 | 2000-12-21 | Beru Ag | Glühkerze und Verfahren zur Herstellung derselben |
DE10117641C2 (de) * | 2001-04-09 | 2003-02-27 | Beru Ag | Stabglühkerze |
DE10128656A1 (de) * | 2001-06-15 | 2003-01-02 | Beru Ag | Stabglühkerze und Verfahren zu ihrer Herstellung |
DE10136596B4 (de) * | 2001-07-30 | 2005-09-15 | Beru Ag | Verfahren zur Verbindung eines stabförmigen Heizelements mit einem rohrförmigen Gehäuse einer Glühkerze und durch dieses Verfahren hergestellte Glühkerze |
DE10249706A1 (de) * | 2002-10-25 | 2004-05-13 | Robert Bosch Gmbh | Gehäuse für Glühstiftkerzen aus Kunststoff |
DE10322129A1 (de) * | 2003-05-16 | 2004-12-02 | Robert Bosch Gmbh | Glühstiftkerze mit besonders eingebettetem Kontaktelement |
FR2869390B1 (fr) | 2004-04-27 | 2006-07-14 | Siemens Vdo Automotive Sas | Corps d'une bougie de prechauffage comprenant un capteur de pression |
FR2869392B1 (fr) * | 2004-04-27 | 2006-07-14 | Siemens Vdo Automotive Sas | Tete d'une bougie de prechauffage equipee d'un capteur de pression |
EP1637806B1 (de) * | 2004-09-15 | 2012-02-01 | Beru AG | Druckmessglühkerze für einen Dieselmotor |
DE102005024622B4 (de) * | 2005-05-30 | 2007-10-04 | Beru Ag | Stabglühkerze |
DE102016114929B4 (de) * | 2016-08-11 | 2018-05-09 | Borgwarner Ludwigsburg Gmbh | Druckmessglühkerze |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58138923A (ja) * | 1982-02-12 | 1983-08-18 | Ngk Spark Plug Co Ltd | 二線式グロ−プラグ |
US4475029A (en) * | 1982-03-02 | 1984-10-02 | Nippondenso Co., Ltd. | Ceramic heater |
JPH01102220A (ja) * | 1987-10-14 | 1989-04-19 | Nippon Denso Co Ltd | ディーゼル機関予熱栓用抵抗装置 |
DE4117253A1 (de) * | 1990-05-28 | 1991-12-12 | Jidosha Kiki Co | Gluehkerze fuer dieselmotoren |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58119047U (ja) * | 1981-12-28 | 1983-08-13 | 日本特殊陶業株式会社 | 二線式グロ−プラグ |
JPS58117924A (ja) * | 1981-12-28 | 1983-07-13 | Ngk Spark Plug Co Ltd | 二線式グロ−プラグ |
JPS58115223A (ja) * | 1981-12-28 | 1983-07-08 | Ngk Spark Plug Co Ltd | 二線式グロ−プラグ |
JPS58138928A (ja) | 1982-02-12 | 1983-08-18 | Sharp Corp | オ−ブンレンジ |
JPS59167635A (ja) * | 1983-03-15 | 1984-09-21 | Toyota Motor Corp | デイ−ゼルエンジンのグロ−プラグ |
JPS60165681U (ja) * | 1984-04-12 | 1985-11-02 | 日本特殊陶業株式会社 | 二線式セラミツクグロ−プラグ |
DE8427789U1 (de) * | 1984-09-21 | 1986-01-23 | Robert Bosch Gmbh, 7000 Stuttgart | Glühstiftkerze für Brennkraftmaschinen |
DE3511086A1 (de) * | 1985-03-27 | 1986-10-09 | Belzer-Dowidat Gmbh Werkzeug-Union, 5600 Wuppertal | Zange |
DE3713532C2 (de) * | 1987-04-22 | 1995-09-07 | Ngk Spark Plug Co | Glühkerze |
JP2752649B2 (ja) * | 1988-09-09 | 1998-05-18 | 日本特殊陶業株式会社 | セラミックヒータ |
JPH06265144A (ja) * | 1993-03-11 | 1994-09-20 | Nippondenso Co Ltd | セラミックグロープラグ |
JPH0742940A (ja) * | 1993-07-29 | 1995-02-10 | Nippondenso Co Ltd | セラミックグロープラグ |
JP3207335B2 (ja) * | 1995-07-31 | 2001-09-10 | 日本特殊陶業株式会社 | グロープラグ |
JP3834889B2 (ja) * | 1996-09-18 | 2006-10-18 | 株式会社デンソー | グロープラグ |
JP3605965B2 (ja) * | 1996-09-12 | 2004-12-22 | 株式会社デンソー | グロープラグ |
-
1999
- 1999-05-05 DE DE19920758A patent/DE19920758C1/de not_active Expired - Fee Related
-
2000
- 2000-04-13 EP EP00108176A patent/EP1050716B1/de not_active Expired - Lifetime
- 2000-04-13 DE DE50003242T patent/DE50003242D1/de not_active Expired - Lifetime
- 2000-04-13 AT AT00108176T patent/ATE247257T1/de not_active IP Right Cessation
- 2000-04-13 ES ES00108176T patent/ES2204391T3/es not_active Expired - Lifetime
- 2000-05-03 KR KR1020000023793A patent/KR100708292B1/ko not_active IP Right Cessation
- 2000-05-05 US US09/565,475 patent/US6255626B1/en not_active Expired - Lifetime
- 2000-05-08 JP JP2000134139A patent/JP2000337633A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58138923A (ja) * | 1982-02-12 | 1983-08-18 | Ngk Spark Plug Co Ltd | 二線式グロ−プラグ |
US4475029A (en) * | 1982-03-02 | 1984-10-02 | Nippondenso Co., Ltd. | Ceramic heater |
JPH01102220A (ja) * | 1987-10-14 | 1989-04-19 | Nippon Denso Co Ltd | ディーゼル機関予熱栓用抵抗装置 |
DE4117253A1 (de) * | 1990-05-28 | 1991-12-12 | Jidosha Kiki Co | Gluehkerze fuer dieselmotoren |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 007, no. 257 (M - 256) 16 November 1983 (1983-11-16) * |
PATENT ABSTRACTS OF JAPAN vol. 013, no. 311 (M - 851) 17 July 1989 (1989-07-17) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007073959A1 (de) * | 2005-12-23 | 2007-07-05 | Robert Bosch Gmbh | Glühstiftkerze |
Also Published As
Publication number | Publication date |
---|---|
DE50003242D1 (de) | 2003-09-18 |
EP1050716B1 (de) | 2003-08-13 |
US6255626B1 (en) | 2001-07-03 |
ES2204391T3 (es) | 2004-05-01 |
ATE247257T1 (de) | 2003-08-15 |
DE19920758C1 (de) | 2000-12-21 |
KR20000077150A (ko) | 2000-12-26 |
KR100708292B1 (ko) | 2007-04-16 |
JP2000337633A (ja) | 2000-12-08 |
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