WO2004104479A1 - Pencil-type glow plug provided with an especially embedded electrical contact - Google Patents

Pencil-type glow plug provided with an especially embedded electrical contact Download PDF

Info

Publication number
WO2004104479A1
WO2004104479A1 PCT/DE2004/000664 DE2004000664W WO2004104479A1 WO 2004104479 A1 WO2004104479 A1 WO 2004104479A1 DE 2004000664 W DE2004000664 W DE 2004000664W WO 2004104479 A1 WO2004104479 A1 WO 2004104479A1
Authority
WO
WIPO (PCT)
Prior art keywords
glow plug
housing
electrical contact
contact element
pencil
Prior art date
Application number
PCT/DE2004/000664
Other languages
German (de)
French (fr)
Inventor
Christoph Haluschka
Rainer Bach
Peter Sossinka
Alexander Klonczynski
Laurent Jeannel
Andreas Gaiser
Susanne Blank
Original Assignee
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2004104479A1 publication Critical patent/WO2004104479A1/en

Links

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

Definitions

  • the invention relates to a glow plug for a fuel engine, consisting of a candle housing, a connection part arranged on the candle housing for the electrical current and a tube with an embedded heating element, the connection part and the heating element being electrically coupled via a connection bolt and a contact element.
  • the object of the invention is to propose a glow plug which shows a stable fixation of the contact element.
  • the solution to the problem consists in embedding the contact element in an insulating casting compound with respect to the housing.
  • the contact element which is preferably in the form of a wire
  • the connecting bolts can be fixed accordingly by using the potting compound.
  • the use of the potting compound ensures that the contact element and / or the connecting bolt is electrically insulated from the candle housing.
  • Plastic casting compounds can preferably be used as the casting compound.
  • ceramic casting compounds or foams are proposed. Potting foams are also proposed.
  • Figure 1 is a schematic representation of part of a glow plug, in section.
  • This glow plug 1 shown.
  • This glow plug 1 consists of a candle housing 2 and a connection area.
  • connection pin 4 is provided within the housing 2.
  • a contact element 5 is provided between these two elements. This contact element 5 is formed as a wire in the embodiment shown in Fig. 1.
  • the potting compound or a foam 6 is introduced into the housing according to the invention, which in the exemplary embodiment shown here also includes the connecting bolt 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)

Abstract

The invention relates to a pencil-type glow plug for an internal combustion engine comprising a shell, an electric current connection area disposed in said shell and a tube provided with a buried heating element, said connection area and heating element being electrically coupled by a connecting bolt and an electrical contact. Said invention is characterised in that the electrical contact (5) is buried in a sealing compound (6) insulating it from the housing (2).

Description

Glühstiftkerze mit besonders eingebettetem KontaktelementGlow plug with specially embedded contact element
Die Erfindung bezieht sich auf eine Glühstiftkerze für eine Brennstoffkraftmaschine, bestehend aus einem Kerzengehäuse, einem an dem Kerzengehäuse angeordneten Anschlussteil für den elektrischen Strom sowie einem Rohr mit einem eingebettetem Heizelement, wobei das Anschlussteil und das Heizelement über einen Anschlussbolzen und ein Kontaktelement elektrisch gekoppelt sind.The invention relates to a glow plug for a fuel engine, consisting of a candle housing, a connection part arranged on the candle housing for the electrical current and a tube with an embedded heating element, the connection part and the heating element being electrically coupled via a connection bolt and a contact element.
Stand der TechnikState of the art
Zur Fixierung des Kontaktelements, das mit dem Anschlussbolzen und dem Anschlussbereich dem sogenannten Pluskontakt im Gehäuseinneren bildet, innerhalb des Gehäuses der Glühstiftkerze sowie dessen Isolierung gegenüber dem Gehäuse sind aus dem Stand der Technik unterschiedliche Verfahren bekannt. Bei solchen Ausführungen, bei denen das Kontaktelement als Draht ausgebildet ist, ist vorgesehen, den Hohlraum, der zwischen dem Gehäuse und dem Draht entsteht, durch MgO aufzufüllen. Anschliessend wird das pulverisierte MgO durch Hämmern verdichtet.Various methods are known from the prior art for fixing the contact element, which forms the so-called positive contact in the interior of the housing with the connecting bolt and the connection area, within the housing and for isolating it from the housing. In such designs, in which the contact element is designed as a wire, it is provided that the cavity which is formed between the housing and the wire is filled with MgO. The powdered MgO is then compacted by hammering.
Nachteile des Standes der TechnikDisadvantages of the prior art
Durch das notwendige Verdichten des MgO innerhalb des Gehäuses ist ein aufwendiger Fertigungsschritt zur Herstellung einer solchen Glühstiftkerze notwendig. -Zudem ist die mechanische Belastung durch das Hämmern auf die Glühstiftkerze relativ gross, weswegen diese entsprechend dimensioniert bzw. ausgelegt sein muss .Due to the necessary compression of the MgO within the housing, a complex manufacturing step is required to produce such a glow plug. In addition, the mechanical stress caused by hammering on the glow plug is relatively high, which is why it must be dimensioned or designed accordingly.
Aufgabe der ErfindungObject of the invention
Aufgabe der Erfindung ist es, eine Glühstiftkerze vorzuschlagen, die eine stabile Fixierung des Kontaktelements zeigt.The object of the invention is to propose a glow plug which shows a stable fixation of the contact element.
Lösung der AufgabeSolution of the task
Die Lösung der Aufgabe bestehf darin, das Kontaktelement in eine isolierende Vergussmasse gegenüber dem Gehäuse einzubetten.The solution to the problem consists in embedding the contact element in an insulating casting compound with respect to the housing.
Vorteile der ErfindungAdvantages of the invention
Einer der wesentlichen Vorteile der Erfindung liegt darin, dass das vorzugsweise als Draht ausgebildete Kontaktelement lagegerecht und stabil innerhalb dem Kerzengehäuse der Glühstiftkerze angeordnet ist. Zusätzlich kann auch durch das Verwenden der Vergussmasse der Anschlussbolzen entsprechend fixiert werden. Ferner wird durch die Verwendung der Vergussmasse erreicht, dass das Kontaktelement und/oder der Anschlussbolzen gegenüber dem Kerzengehäuse elektrisch isoliert ist.One of the essential advantages of the invention is that the contact element, which is preferably in the form of a wire, is arranged correctly and stably within the plug housing of the glow plug. In addition, the connecting bolts can be fixed accordingly by using the potting compound. Furthermore, the use of the potting compound ensures that the contact element and / or the connecting bolt is electrically insulated from the candle housing.
Als Vergussmasse können vorzugsweise Kunststoffgussmassen verwendet werden. Alternativ hierzu werden keramische Vergussmassen oder -schäume vorgeschlagen. Ferner werden Vergussschäume vorgeschlagen.Plastic casting compounds can preferably be used as the casting compound. As an alternative to this, ceramic casting compounds or foams are proposed. Potting foams are also proposed.
Weitere vorteilhafte Ausgestaltungen gehen aus der nachfolgenden Beschreibung sowie den Ansprüchen hervor.Further advantageous embodiments emerge from the following description and the claims.
Zeichnungdrawing
Es zeigt:It shows:
Figur 1 eine schematische Darstellung eines Teils einer Glühstiftkerze, im Schnitt.Figure 1 is a schematic representation of part of a glow plug, in section.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In Fig. 1 sind die der Erfindung zugrundeliegenden Teile einerIn Fig. 1 the parts of the invention are one
Glühstiftkerze 1 dargestellt. Diese Glühstiftkerze 1 besteht aus einem Kerzengehäuse 2 sowie aus einem Anschlussbereich .Glow plug 1 shown. This glow plug 1 consists of a candle housing 2 and a connection area.
Innerhalb des Gehäuses 2 ist ein Anschlussbolzen 4 vorgesehen. Um den elektrischen Kontakt zwischen dem Anschlussbolzen 4 und dem Anschlussbereich 3 herzustellen, ist ein zwischen diesen beiden Elementen ein Kontaktelement 5 vorgesehen. Dieses Kontaktelement 5 ist bei dem in Fig. 1 dargestellten Ausführungsbeispiel als Draht ausgebildet .A connection pin 4 is provided within the housing 2. In order to establish the electrical contact between the connecting pin 4 and the connecting area 3, a contact element 5 is provided between these two elements. This contact element 5 is formed as a wire in the embodiment shown in Fig. 1.
Um die Fixierung des Kontaktelements 5 und dessen Isolierung gegenüber dem Gehäuse 2 zu erreichen, wird in das Gehäuse erfindungsgemass die Vergussmasse oder eine Schaum 6 eingebracht, die bei dem hier dargestellten Ausführungsbeispiel auch den Anschlussbolzen 4 mitumfasst. In order to achieve the fixation of the contact element 5 and its insulation with respect to the housing 2, the potting compound or a foam 6 is introduced into the housing according to the invention, which in the exemplary embodiment shown here also includes the connecting bolt 4.

Claims

A N S P R Ü C H E EXPECTATIONS
1. Glühstiftkerze für eine Brennstoffkraftmaschine, bestehend aus einem Kerzengehäuse, einem an dem Kerzengehäuse angeordneten Anschlussteil für den elektrischen Strom sowie einem Rohr mit einem eingebettetem Heizelement, wobei der Anschlussbereich und das Heizelement über einen Anschlussbolzen und ein Kontaktelement elektrisch gekoppelt sind, dadurch gekennzeichnet, dass das Kontaktelement (5) in eine isolierende Vergussmasse (6) gegenüber dem Gehäuse (2) eingebettet ist.1. glow plug for a fuel engine, consisting of a candle housing, a connection part arranged on the candle housing for the electrical current and a tube with an embedded heating element, the connection area and the heating element being electrically coupled via a connection bolt and a contact element, characterized in that the contact element (5) is embedded in an insulating casting compound (6) relative to the housing (2).
2. Glühstiftkerze nach Anspruch 1, dadurch gekennzeichnet, dass die Vergussmasse (6) im wesentlichen aus keramischem Material besteht .2. Glow plug according to claim 1, characterized in that the casting compound (6) consists essentially of ceramic material.
3. Glühstiftkerze nach Anspruch 1, dadurch gekennzeichnet, dass die Vergussmasse (6) im wesentlichen aus Kunststoff besteht.3. glow plug according to claim 1, characterized in that the casting compound (6) consists essentially of plastic.
4. Glühstiftkerze nach Anspruch 1, dadurch gekennzeichnet, dass die Vergussmasse (6) schaumartig ist. Glühstiftkerze nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Kontaktelement (5) ein Draht ist. 4. glow plug according to claim 1, characterized in that the sealing compound (6) is foam-like. Glow plug according to at least one of the preceding claims, characterized in that the contact element (5) is a wire.
PCT/DE2004/000664 2003-05-16 2004-03-31 Pencil-type glow plug provided with an especially embedded electrical contact WO2004104479A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10322129.8 2003-05-16
DE2003122129 DE10322129A1 (en) 2003-05-16 2003-05-16 Glow plug with specially embedded contact element

Publications (1)

Publication Number Publication Date
WO2004104479A1 true WO2004104479A1 (en) 2004-12-02

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PCT/DE2004/000664 WO2004104479A1 (en) 2003-05-16 2004-03-31 Pencil-type glow plug provided with an especially embedded electrical contact

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DE (1) DE10322129A1 (en)
WO (1) WO2004104479A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006032558A1 (en) * 2004-09-22 2006-03-30 Robert Bosch Gmbh Method for embedding a metallic wire in a ceramic element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005043415A1 (en) * 2005-09-13 2007-03-15 Robert Bosch Gmbh glow plug

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB821601A (en) * 1954-10-29 1959-10-14 Vickers Electrical Co Ltd Improvements in and relating to glow plugs for compression ignition engines
US4401065A (en) * 1980-08-23 1983-08-30 Jidosha Kiki Co., Ltd. Glow plugs for use in diesel engines
US4429213A (en) * 1978-10-20 1984-01-31 Dayco Corporation Electrically heated fluid conduit
EP0848209A2 (en) * 1996-12-11 1998-06-17 Isuzu Ceramics Research Institute Co., Ltd. Ceramic heater and process for producing the same
EP0918195A2 (en) * 1997-11-21 1999-05-26 Isuzu Ceramics Research Institute Co., Ltd. Unit sheath
US6255626B1 (en) * 1999-05-05 2001-07-03 Beru Ag Glow plug and process for its manufacture
DE10020558C1 (en) * 2000-04-27 2001-09-20 Webasto Thermosysteme Gmbh Glow plug has metal casing that encloses connecting wire end of ceramic glow element to leave annular gap between inside of casing and glow element filled with ceramic setting material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB821601A (en) * 1954-10-29 1959-10-14 Vickers Electrical Co Ltd Improvements in and relating to glow plugs for compression ignition engines
US4429213A (en) * 1978-10-20 1984-01-31 Dayco Corporation Electrically heated fluid conduit
US4401065A (en) * 1980-08-23 1983-08-30 Jidosha Kiki Co., Ltd. Glow plugs for use in diesel engines
EP0848209A2 (en) * 1996-12-11 1998-06-17 Isuzu Ceramics Research Institute Co., Ltd. Ceramic heater and process for producing the same
EP0918195A2 (en) * 1997-11-21 1999-05-26 Isuzu Ceramics Research Institute Co., Ltd. Unit sheath
US6255626B1 (en) * 1999-05-05 2001-07-03 Beru Ag Glow plug and process for its manufacture
DE10020558C1 (en) * 2000-04-27 2001-09-20 Webasto Thermosysteme Gmbh Glow plug has metal casing that encloses connecting wire end of ceramic glow element to leave annular gap between inside of casing and glow element filled with ceramic setting material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006032558A1 (en) * 2004-09-22 2006-03-30 Robert Bosch Gmbh Method for embedding a metallic wire in a ceramic element

Also Published As

Publication number Publication date
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