WO1986001878A1 - Sheathed-element glow plug for internal combustion engines - Google Patents
Sheathed-element glow plug for internal combustion engines Download PDFInfo
- Publication number
- WO1986001878A1 WO1986001878A1 PCT/DE1985/000315 DE8500315W WO8601878A1 WO 1986001878 A1 WO1986001878 A1 WO 1986001878A1 DE 8500315 W DE8500315 W DE 8500315W WO 8601878 A1 WO8601878 A1 WO 8601878A1
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- WIPO (PCT)
- Prior art keywords
- glow plug
- insulating sleeve
- connecting bolt
- metal housing
- plug according
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Classifications
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- 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 according to the type of the main claim.
- a glow plug is already known (DE-GbmS 1 929 292), in which the connecting bolt is provided with a thread which plunges deep into the longitudinal bore of the metal housing and is partially surrounded by a silicone rubber tube; this silicone rubber hose is encompassed by the connection-side, compressed section of the metal housing and forms the seal and electrical insulation between the connecting bolt and the metal housing.
- the glow plug according to the invention with the characterizing features of the main claim has the advantage that its connecting bolt is securely held against torsional forces occurring when connecting and disconnecting connecting cables.
- connection bolt is composed of a cylindrical metal rod and a tubular connection head which is fixed on the connection-side region of the metal rod and has projections and / or inlets on its outside,
- FIG. 1 shows an enlarged longitudinal section through the connection-side area of a glow plug according to the invention and FIG. 2 shows a cross section along the line AB through the enlarged glow plug according to FIG. 1.
- the glow plug 10 shown in FIGS. 1 and 2 the structure of which essentially derives from the aforementioned DE-GbmS 1 9.29. 292 or also known from DE-OS 28 35 236, has a tubular metal housing 11, on the outside of which a key hexagon 12, a screw thread, not shown, and a sealing element, also not shown (z, B, frustoconical sealing surface or sealing ring) are arranged are and which has a longitudinal bore 13.
- the part of the glow plug which protrudes from the end section of the metal housing 12 and is equipped with the actual glow element is not shown in FIGS. 1 and 2, but is also not relevant in connection with the present invention, but is known from the aforementioned prior art.
- connection pin 14 is composed of two parts, namely a cylindrical metal rod 14/1 and a metal connection head 14/2; the connection head 14/2 has a central inner bore 15 with which it is pushed onto the end section of the metal rod 14/1 that is remote from the combustion chamber, but in this case projects somewhat beyond the end surface 16 remote from the combustion chamber.
- connection head 14/2 The blind hole 17 formed by this end face 16 of the metal rod 14/1 and the section of the inner bore 15 of the connection head 14/2 remote from the combustion chamber serves to fix the connection head 14/2 on the metal rod 14/1, namely by means of a brazing point 18, the section remote from the combustion chamber of the connection head 14/2 is on its outside with a connection thread 19 provided, on which a nut 20 is screwed; this nut 20 has an end surface 21 remote from the combustion chamber as a system for a connection cable (not shown), an end surface 22 on the combustion chamber side and an annular notch 23 running coaxially on the outside, which serves to fix this nut 20 on the connection thread 19 of the connection bolt 14 (e.g. by Caulking).
- the nut 20 screwed onto the connecting thread 19 of the connecting bolt 14 presses with its end face 22 on the combustion chamber side onto the end face 24 remote from the combustion chamber, which is made of a plastic, in particular a thermoplastic;
- a thermoplastic of this type is preferably used for this insulating sleeve 25 and can be deformed by the use of vibration (eg, by means of ultrasound).
- This insulating sleeve 25 which consists for example of a polyamide, is located partially in the end portion of the longitudinal bore 13 of the metal housing 1.1; the insulating sleeve 25 rests with its outer side 26 in the affected section of the longitudinal bore 13 of the metal housing 11 and also firmly encloses with its inner side 27 the section of the connecting head 14/2 of the connecting bolt 14 which plunges into the longitudinal bore 13 of the metal housing 11, this insulating sleeve 25 , which is used for electrical insulation between the electrically grounded metal housing 11 with respect to the connecting bolts 14 between the two components 11 and 14 mentioned, cooperates with the longitudinal bore 13 of the metal housing 11 and the connecting bolt 14 so that they when connecting and disconnecting Connection cables, not shown, absorbs tension and torsional forces which could cause damage to the glow plug 10.
- the longitudinal bore in the area remote from the combustion chamber 13 of the metal housing 11 has at least one inlet 28 or at least one projection 29 which is firmly engaged with the outside 26 of the insulating sleeve 25, and that the connecting bolt 14 also has at least one inlet 30 or a projection 31 which with the inside 27 of the insulating sleeve 25 is firmly engaged.
- several such inlets 28 and 30 or projections 29 and 31 are arranged both in the longitudinal bore 13 of the metal housing 11 and on the corresponding area of the connection head 14/2, and preferably distributed evenly over the respective circumference.
- a combination of projections and inlets was chosen within the longitudinal bore 13 of the metal housing 11, because this design is expedient for manufacturing reasons:
- two inlets 28/1 and 28/2 incorporated, which are spaced one above the other and are connected to one another by longitudinally extending, groove-like inlets 28/3; the latter inlets 28/3, four of which are evenly distributed on the circumference of the longitudinal bore 13 of the metal housing 11 in the example, alternate in the circumference with projections 29/1 and absorb torsional forces which act on the connecting bolts 14 and / or Insulating sleeve 25 act.
- the diameter of the annular groove-like inlet 28/2 is smaller in the exemplary embodiment than the outer diameter of the annular groove-like inlet 28/1,
- connection head 14/2 The protruding into the longitudinal bore 13 of the metal housing 11 section of the connection head 14/2 is ver in the present example with four evenly on the circumference shared projections 31 equipped, which run like ribs in the longitudinal direction of the connecting bolt 14; in this case, the shoulder 32 remote from the combustion chamber and also the shoulder 33 of the connection head 14/2, which runs in the shape of a truncated cone and runs in the shape of a truncated cone, is partially surrounded by the inside 27 of the insulating sleeve 27.
- the inlets located between the projections 31 of the connection head 14/2 are designated by the reference number 30.
- the insulating sleeve 25 is preferably deformed by using ultrasound such that the inlets 28 and projections 29 in the metal housing 11 and also the inlets 30 and projections 31 in the connection head 14/2 are filled by the insulating sleeve 25 an annular shoulder 35 is incorporated into the end face 34 of the metal housing 11 remote from the combustion chamber and limits the outer diameter of the insulating sleeve 25 in this area; this region of the insulating sleeve 25 preferably has an outer diameter which corresponds to the outer diameter of the nut 20.
- the inlets 28 or projections 29 in the longitudinal bore 13 of the metal housing 11 with the inlets 30 or the projections 31 on the connection head 14/2 can lie arbitrarily.
- the insulating sleeve 25 made of plastic is mentioned, but the insulating sleeve 25 can also consist of a suitable putty, casting resin or glass; in this case, the dimensions between the affected area in the longitudinal bore 13 of the metal housing 11 and the connecting bolt 14 are to be interpreted accordingly.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Spark Plugs (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Glühstiftkerze für BrennkraftmaschinenGlow plug for internal combustion engines
Stand der TechnikState of the art
Die Erfindung geht aus von einer Glühstiftkerze nach der Gattung des Hauptanspruchs. Es ist schon eine Glühstiftkerze bekannt (DE-GbmS 1 929 292), bei der der Anschlußbolzen mit einem Gewinde versehen ist, das bis tief in die Längsbohrung des Metallgehäuses eintaucht und teilweise von einem Silicongummischlauch umgeben ist; dieser Silicongummischlauch wird von dem anschlußseitigen, zusammengepreßten Abschnitt des Metallgehäuses umfaßt und bildet die Dichtung und elektrische Isolation zwischen Anschlußbolzen und Metallgehäuse. Infolge des Gewindes auf dem Anschlußbolzen wird ein guter Dichtbereich gebildet und der Anschlußbolzen beim An- und Abklemmen von Anschlußkabeln gegenüber Zugkräften gesichert, doch gegegenüber beim An- und Abklemmen von Anschlußkabeln auftretenden Torsionskräften ist eine solche Glühstiftkerze nicht befriedigend gesichert; ein weiterer Nachteil dieser Dichtung ist der relativ große Maschinenaufwand, um den anschlußseitigen Abschnitt des Metallgehäuses radial zusammenzupressen. Vorteile der ErfindungThe invention relates to a glow plug according to the type of the main claim. A glow plug is already known (DE-GbmS 1 929 292), in which the connecting bolt is provided with a thread which plunges deep into the longitudinal bore of the metal housing and is partially surrounded by a silicone rubber tube; this silicone rubber hose is encompassed by the connection-side, compressed section of the metal housing and forms the seal and electrical insulation between the connecting bolt and the metal housing. As a result of the thread on the connecting bolt, a good sealing area is formed and the connecting bolt is secured against tensile forces when connecting and disconnecting connecting cables, but such a glow plug is not adequately secured against torsional forces occurring when connecting and disconnecting connecting cables; Another disadvantage of this seal is the relatively large amount of machinery required to radially compress the connection-side section of the metal housing. Advantages of the invention
Die erfindungsgemäße Glühstiftkerze mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß ihr Anschlußbolzen auch gegenüber beim Anund Abklemmen von Anschlußkabeln auftretenden Torsionskräften sicher gehalten wird.The glow plug according to the invention with the characterizing features of the main claim has the advantage that its connecting bolt is securely held against torsional forces occurring when connecting and disconnecting connecting cables.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Glühstiftkerze möglich. Besonders vorteilhaft ist es, wenn als Isolierhülse zwischen Anschlußbolzen und Metallgehäuse ein thermoplastischer Kunststoff, insbesondere ein mittels Vibration verformbarer Kunststoff verwendet wird. Ein weiterer Vorteil ist fertigungstechnisch gegeben, wenn der Anschlußbolzen aus einem zylinderförmigen Metallstab und einem rohrartigen Anschlußkopf zusammengesetzt ist, welcher auf dem anschlußseitigen Bereich des Metallstabes festgelegt ist und auf seiner Außenseite Vorsprünge und/oder Einlasse trägt,The measures listed in the subclaims allow advantageous developments and improvements of the glow plug specified in the main claim. It is particularly advantageous if a thermoplastic, in particular a plastic that can be deformed by vibration, is used as the insulating sleeve between the connecting bolt and the metal housing. A further advantage is given in terms of production technology if the connection bolt is composed of a cylindrical metal rod and a tubular connection head which is fixed on the connection-side region of the metal rod and has projections and / or inlets on its outside,
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen vergrößert dargestellten Längsschnitt durch den anschlußseitigen Bereich einer erfindungsgemäßen Glühstiftkerze und Figur 2 einen Querschnitt nach der Linie A-B durch die vergrößert dargestellte Glühstiftkerze nach Figur 1. Beschreibung des AusführungsbeispielesAn embodiment of the invention is shown in the drawing and explained in more detail in the following description. 1 shows an enlarged longitudinal section through the connection-side area of a glow plug according to the invention and FIG. 2 shows a cross section along the line AB through the enlarged glow plug according to FIG. 1. Description of the embodiment
Die in den Figuren 1 und 2 dargestellte Glühstiftkerze 10, deren Aufbau im wesentlichen aus der eingangs genannten DE-GbmS 1 9.29. 292 bzw. auch aus der DE-OS 28 35 236 bekannt ist, hat ein rohrförmiges Metallgehäuse 11, auf dessen Außenseite sich ein Schlüsselsechskant 12, ein nicht dargestelltes Einschraubgewinde und ein ebenfalls nicht dargestelltes Abdichtelement (z, B, kegelstumpfförmige Dichtfläche oder Dichtring) angeordnet sind und das eine Längsbohrung 13 aufweist. Der aus dem brennraumseitigen Endabschnitt des Metallgehäuses 12 herausragende, mit dem eigentlichen Glühelement ausgestattete Teil des Glühstiftes ist nicht aus den Figuren 1 und 2 ersichtlich, im Zu¬sammenhang mit der vorliegenden Erfindung aber auch nicht relevant, jedoch aus dem vorgenannten Stand der Technik bekannt. Der axial in der Längsbohrung 13 des Metallgehäuses 11 verlaufende metallische Anschlußbolzen 14, welcher mit seinem brennraumseitigen Endabschnitt mit dem nicht dargestellten Glühelement des Glühstiftes elektrisch verbunden ist, ragt mit seinem brennraumfernen Endabschnitt aus dem brennraumfernen Ende des Metallgehäuses 11 heraus. Dieser Anschlußbolzen 14 ist aus zwei Teilen zusammengesetzt, und zwar aus einem zylindrischen Metallstab 14/1 und einem metallischen Anschlußkopf 14/2; der Anschlußkopf 14/2 hat eine zentrale Innenbohrung 15 mit welcher er auf den brennraumfernen Endabschnitt des Metallstabes 14/1 aufgeschoben ist, dabei jedoch die brennraumferne Stirnfläche 16 etwas überragt. Das von dieser Stirnfläche 16 des Metallstabes 14/1 und dem brennraumfernen Abschnitt der Innenbohrung 15 des Anschlußkopfes 14/2 gebildete Sackloch 17 dient zum Festlegen des Anschlußkopfes 14/2 auf dem Metallstab 14/1, und zwar mittels einer Hartlötstelle 18, Der brennraumferne Abschnitt des Anschlußkopfes 14/2 ist auf seiner Außenseite mit einem Anschlußgewinde 19 versehen, auf welches eine Mutter 20 aufgeschraubt ist; diese Mutter 20 besitzt eine brennraumferne Stirnfläche 21 als Anlage für ein nicht dargestelltes Anschlußkabel, eine brennraumseitige Stirnfläche 22 und eine auf ihrer Außenseite koaxial verlaufende Ringkerbe 23, welche zum Festlegen dieser Mutter 20 auf dem Anschlußgewinde 19 des Anschlußbolzens 14 dient (z. B. durch Verstemmen).The glow plug 10 shown in FIGS. 1 and 2, the structure of which essentially derives from the aforementioned DE-GbmS 1 9.29. 292 or also known from DE-OS 28 35 236, has a tubular metal housing 11, on the outside of which a key hexagon 12, a screw thread, not shown, and a sealing element, also not shown (z, B, frustoconical sealing surface or sealing ring) are arranged are and which has a longitudinal bore 13. The part of the glow plug which protrudes from the end section of the metal housing 12 and is equipped with the actual glow element is not shown in FIGS. 1 and 2, but is also not relevant in connection with the present invention, but is known from the aforementioned prior art. The axially extending in the longitudinal bore 13 of the metal housing 11 metallic connecting bolt 14, which is electrically connected with its end section on the combustion chamber side to the glow element (not shown) of the glow plug, projects with its end section away from the combustion chamber out of the end of the metal housing 11 away from the combustion chamber. This connection pin 14 is composed of two parts, namely a cylindrical metal rod 14/1 and a metal connection head 14/2; the connection head 14/2 has a central inner bore 15 with which it is pushed onto the end section of the metal rod 14/1 that is remote from the combustion chamber, but in this case projects somewhat beyond the end surface 16 remote from the combustion chamber. The blind hole 17 formed by this end face 16 of the metal rod 14/1 and the section of the inner bore 15 of the connection head 14/2 remote from the combustion chamber serves to fix the connection head 14/2 on the metal rod 14/1, namely by means of a brazing point 18, the section remote from the combustion chamber of the connection head 14/2 is on its outside with a connection thread 19 provided, on which a nut 20 is screwed; this nut 20 has an end surface 21 remote from the combustion chamber as a system for a connection cable (not shown), an end surface 22 on the combustion chamber side and an annular notch 23 running coaxially on the outside, which serves to fix this nut 20 on the connection thread 19 of the connection bolt 14 (e.g. by Caulking).
Die auf das Anschlußgewinde 19 des Anschlußbolzens 14 aufgeschraubte Mutter 20 drückt mit ihrer brennraumseitigen Stirnfläche 22 auf die brennraumferne Stirnfläche 24 einer Isolierhülse 25, die aus einem Kunststoff, insbesondere einem thermoplastischen Kunststoff besteht; bevorzugterweise findet für diese Isolierhülse 25 ein derartiger thermoplastischer Kunststoff Verwendung, der durch Anwendung von Vibration (z, B, mittels Ultraschall) verformbar ist. Diese Isolierhülse 25, die beispielsweise aus einem Polyamid besteht, befindet sich teilweise im brennraumfernen Endabschnitt der Längsbohrung 13 des Metallgehäuses 1.1; die Isolierhülse 25 liegt dabei mit ihrer Außenseite 26 in dem betroffenen Abschnitt der Längsbohrung 13 des Metallgehäuses 11 an und umfaßt auch fest mit ihrer Innenseite 27 den in die Längsbohrung 13 des Metallgehäuses 11 eintauchenden Abschnitt des Anschlußkopfes 14/2 des Anschlußbolzens 14, Diese Isolierhülse 25, die der elektrischen Isolierung zwischen dem elektrisch an Masse liegendem Metallgehäuse 11 gegenüber den Anschlußbolzen 14 zwischen den beiden genannten Bauteilen 11 und 14 dient, wirkt mit der Längsbohrung 13 des Metallgehäuses 11 und dem Anschlußbolzen 14 derart zusammen, so daß sie beim An und Abklemmen von nicht dargestellten Anschlußkabeln Zug und Torsionskräfte auffängt, welche der Glühstiftkerze 10 Schaden zufügen könnten. Bewirkt ist dieses dadurch, daß im brennraumfernen Bereich die Längsbohrung 13 des Metallgehäuses 11 mindestens einen Einlaß 28 bzw. mindestens einen Vorsprung 29 hat, welcher mit der Außenseite 26 der Isolierhülse 25 fest in Eingriff steht, und daß auch der Anschlußbolzen 14 mindestens einen Einlaß 30 bzw, einen Vorsprung 31 besitzt, welcher mit der Innenseite 27 der Isolierhülse 25 fest in Eingriff steht. Vorteilhafterweise werden jedoch sowohl in der Längsbohrung 13 des Metallgehäuses 11 als auch auf dem entsprechenden Bereich des Anscrhlußkopfes 14/2 mehrere derartiger Einlasse 28 und 30 bzw. Vorsprünge 29 und 31 angeordnet, und zwar in bevorzugter Weise gleichmäßig auf dem jeweiligen Umfang verteilt.The nut 20 screwed onto the connecting thread 19 of the connecting bolt 14 presses with its end face 22 on the combustion chamber side onto the end face 24 remote from the combustion chamber, which is made of a plastic, in particular a thermoplastic; A thermoplastic of this type is preferably used for this insulating sleeve 25 and can be deformed by the use of vibration (eg, by means of ultrasound). This insulating sleeve 25, which consists for example of a polyamide, is located partially in the end portion of the longitudinal bore 13 of the metal housing 1.1; the insulating sleeve 25 rests with its outer side 26 in the affected section of the longitudinal bore 13 of the metal housing 11 and also firmly encloses with its inner side 27 the section of the connecting head 14/2 of the connecting bolt 14 which plunges into the longitudinal bore 13 of the metal housing 11, this insulating sleeve 25 , which is used for electrical insulation between the electrically grounded metal housing 11 with respect to the connecting bolts 14 between the two components 11 and 14 mentioned, cooperates with the longitudinal bore 13 of the metal housing 11 and the connecting bolt 14 so that they when connecting and disconnecting Connection cables, not shown, absorbs tension and torsional forces which could cause damage to the glow plug 10. This is achieved in that the longitudinal bore in the area remote from the combustion chamber 13 of the metal housing 11 has at least one inlet 28 or at least one projection 29 which is firmly engaged with the outside 26 of the insulating sleeve 25, and that the connecting bolt 14 also has at least one inlet 30 or a projection 31 which with the inside 27 of the insulating sleeve 25 is firmly engaged. Advantageously, however, several such inlets 28 and 30 or projections 29 and 31 are arranged both in the longitudinal bore 13 of the metal housing 11 and on the corresponding area of the connection head 14/2, and preferably distributed evenly over the respective circumference.
Im vorliegenden Beispiel wurde innerhalb der Längsbohrung 13 des Metallgehäuses 11 eine Kombination von Vorsprüngen und Einlassen gewählt, weil diese Gestaltung aus fertigungstechnischen Gründen zweckmäßig ist: In der Längsbohrung 13 des Metallgehäuses 11 sind dazu zur Aufnahme von Zugkräften zwei als Ringnuten ausgeführte Einlasse 28/1 und 28/2 eingearbeitet, welche mit Abstand übereinanderliegen und durch in Längsrichtung verlaufende, nutenartige Einlasse 28/3 miteinander verbunden sind; die letztgenannten Einlasse 28/3, von denen im Beispiel vier Stück auf dem Umfang der Längsbohrung 13 des Metallgehäuses 11 gleichmäßig verteilt sind, wechseln sich dabei im Umfang mit Vorsprüngen 29/1 ab und nehmen Torsionskräfte auf, welche auf den Anschlußbolzen 14 bzw, die Isolierhülse 25 wirken. Der Durchmesser des ringnutartigen Einlasses 28/2 ist bei dem Ausführungsbeispiel kleiner als der Außendurchmesser des ringnutartigen Einlasses 28/1,In the present example, a combination of projections and inlets was chosen within the longitudinal bore 13 of the metal housing 11, because this design is expedient for manufacturing reasons: In the longitudinal bore 13 of the metal housing 11, two inlets 28/1 and 28/2 incorporated, which are spaced one above the other and are connected to one another by longitudinally extending, groove-like inlets 28/3; the latter inlets 28/3, four of which are evenly distributed on the circumference of the longitudinal bore 13 of the metal housing 11 in the example, alternate in the circumference with projections 29/1 and absorb torsional forces which act on the connecting bolts 14 and / or Insulating sleeve 25 act. The diameter of the annular groove-like inlet 28/2 is smaller in the exemplary embodiment than the outer diameter of the annular groove-like inlet 28/1,
Der in die Längsbohrung 13 des Metallgehäuses 11 hineinragende Abschnitt des Anschlußkopfes 14/2 ist im vorliegenden Beispiel mit vier gleichmäßig auf dem Umfang ver teilten Vorsprüngen 31 ausgestattet, die rippenartig in Längsrichtung des Anschlußbolzens 14 verlaufen; dabei wird auch die brennraumferne Schulter 32 sowie auch die kegelstumpfförmig verlaufende brennraumseitige Schulter 33 des Anschlußkopfes 14/2 von der Innenseite 27 der Isolierhülse 27 teilweise umfaßt. Die zwischen den Vorsprüngen 31 des Anschlußkopfes 14/2 befindlichen Einlasse sind mit der Bezugszahl 30 bezeichnet.The protruding into the longitudinal bore 13 of the metal housing 11 section of the connection head 14/2 is ver in the present example with four evenly on the circumference shared projections 31 equipped, which run like ribs in the longitudinal direction of the connecting bolt 14; in this case, the shoulder 32 remote from the combustion chamber and also the shoulder 33 of the connection head 14/2, which runs in the shape of a truncated cone and runs in the shape of a truncated cone, is partially surrounded by the inside 27 of the insulating sleeve 27. The inlets located between the projections 31 of the connection head 14/2 are designated by the reference number 30.
Da - wie weiter vorn schon erwähnt - die Isolierhülse 25 bevorzugt durch Anwendung von Ultraschall derart verformt wird, so daß die Einlasse 28 und Vorsprünge 29 im Metallgehäuse 11 sowie auch die Einlasse 30 bzw. Vorsprünge 31 im Anschlußkopf 14/2 von der Isolierhülse 25 ausgefüllt sind, ist in die brennraumferne Stirnseite 34 des Metallgehäuses 11 ein ringförmiger Absatz 35 eingearbeitet, der den Außendurchmesser der Isolierhülse 25 in diesem Bereich begrenzt; bevorzugterweise hat dieser Bereich der Isolierhülse 25 einen Außendurchmesser, der dem Außendurchmesser der Mutter 20 entspricht.Since - as already mentioned above - the insulating sleeve 25 is preferably deformed by using ultrasound such that the inlets 28 and projections 29 in the metal housing 11 and also the inlets 30 and projections 31 in the connection head 14/2 are filled by the insulating sleeve 25 an annular shoulder 35 is incorporated into the end face 34 of the metal housing 11 remote from the combustion chamber and limits the outer diameter of the insulating sleeve 25 in this area; this region of the insulating sleeve 25 preferably has an outer diameter which corresponds to the outer diameter of the nut 20.
Es sei erwähnt, daß die Einlasse 28 bzw. Vorsprünge 29 in der Längsbohrung 13 des Metallgehäuses 11 mit den Einlassen 30 bzw, den Vorsprüngen 31 auf dem Anschlußkopf 14/2 willkürlich liegen können. In der vorstehenden Beschreibung ist nur eine Isolierhülse 25 aus Kunststoff genannt, die Isolierhülse 25 kann aber ebenso aus einem geeignetem Kitt, Gießharz oder Glas bestehen; in diesem Falle sind die Abmessungen zwischen dem betroffenen Bereich in der Längsbohrung 13 des Metallgehäuses 11 und dem Anschlußbolzen 14 entsprechend auszulegen.It should be mentioned that the inlets 28 or projections 29 in the longitudinal bore 13 of the metal housing 11 with the inlets 30 or the projections 31 on the connection head 14/2 can lie arbitrarily. In the above description, only one insulating sleeve 25 made of plastic is mentioned, but the insulating sleeve 25 can also consist of a suitable putty, casting resin or glass; in this case, the dimensions between the affected area in the longitudinal bore 13 of the metal housing 11 and the connecting bolt 14 are to be interpreted accordingly.
Anstelle eines zweiteiligen Anschlußbolzens 14 ist auch die Verwendung eines einteiligen Anschlußbolzens möglich, letzterer dürfte jedoch einen höheren Materialbedarf haben. Instead of a two-part connecting bolt 14, it is also possible to use a one-part connecting bolt, but the latter should have a higher material requirement.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19848427789 DE8427789U1 (en) | 1984-09-21 | 1984-09-21 | Sheathed-element glow plugs for internal combustion engines |
| DEG8427789.0U | 1984-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1986001878A1 true WO1986001878A1 (en) | 1986-03-27 |
Family
ID=6770913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1985/000315 Ceased WO1986001878A1 (en) | 1984-09-21 | 1985-09-11 | Sheathed-element glow plug for internal combustion engines |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0194292A1 (en) |
| JP (1) | JPS62500258A (en) |
| DE (1) | DE8427789U1 (en) |
| ES (1) | ES289122Y (en) |
| WO (1) | WO1986001878A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002196A1 (en) * | 1989-07-28 | 1991-02-21 | Caterpillar Inc. | Interference connection between a heating element and body of a glow plug |
| WO2001069135A1 (en) * | 2000-03-14 | 2001-09-20 | Robert Bosch Gmbh | Sheathed element glow plug for an internal combustion engine |
| WO2005026619A1 (en) * | 2003-08-28 | 2005-03-24 | Robert Bosch Gmbh | Sheathed-element glow plug comprising a specially embedded contact element |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT235871Y1 (en) * | 1995-05-31 | 2000-07-18 | Cooper Ind Inc | SELF-CLEANING OSCILLATING GASKET FOR AN ARMORED RESISTANCE OF A PRE-HEATING CANDLE FOR DIESEL ENGINES |
| IT1285043B1 (en) * | 1996-03-29 | 1998-06-03 | Cooper Ind Italia | GLOW PLUG, PARTICULARLY FOR DIESEL ENGINES |
| DE19920758C1 (en) * | 1999-05-05 | 2000-12-21 | Beru Ag | Glow plug and method of making the same |
| FR3021094A1 (en) * | 2014-05-13 | 2015-11-20 | Bosch Gmbh Robert | PREHEATING ELECTRODE WITH INSULATION SEAL |
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| DE1003507B (en) * | 1955-12-12 | 1957-02-28 | Walter Goetze | Fastening the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines |
| FR2329088A1 (en) * | 1975-10-21 | 1977-05-20 | Djeddah Jacques | CANDLE OR IGNITION ELECTRODE FOR BURNER |
| JPS53141840A (en) * | 1977-05-16 | 1978-12-11 | Ngk Spark Plug Co Ltd | Manufacturing method of sheathed glow plug |
| DE3211262A1 (en) * | 1981-03-23 | 1982-11-04 | Jidosha Kiki Co., Ltd., Tokyo | GLOW PLUG FOR USE IN A DIESEL ENGINE AND METHOD FOR THE PRODUCTION THEREOF |
| EP0105807A1 (en) * | 1982-09-30 | 1984-04-18 | The Bendix Corporation | Glow plug having a conductive film heater |
-
1984
- 1984-09-21 DE DE19848427789 patent/DE8427789U1/en not_active Expired
-
1985
- 1985-09-11 EP EP19850904601 patent/EP0194292A1/en not_active Withdrawn
- 1985-09-11 JP JP60504160A patent/JPS62500258A/en active Pending
- 1985-09-11 WO PCT/DE1985/000315 patent/WO1986001878A1/en not_active Ceased
- 1985-09-20 ES ES1985289122U patent/ES289122Y/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1003507B (en) * | 1955-12-12 | 1957-02-28 | Walter Goetze | Fastening the threaded or grooved center electrode in the insulating body of a spark plug for internal combustion engines |
| FR2329088A1 (en) * | 1975-10-21 | 1977-05-20 | Djeddah Jacques | CANDLE OR IGNITION ELECTRODE FOR BURNER |
| JPS53141840A (en) * | 1977-05-16 | 1978-12-11 | Ngk Spark Plug Co Ltd | Manufacturing method of sheathed glow plug |
| DE3211262A1 (en) * | 1981-03-23 | 1982-11-04 | Jidosha Kiki Co., Ltd., Tokyo | GLOW PLUG FOR USE IN A DIESEL ENGINE AND METHOD FOR THE PRODUCTION THEREOF |
| EP0105807A1 (en) * | 1982-09-30 | 1984-04-18 | The Bendix Corporation | Glow plug having a conductive film heater |
Non-Patent Citations (1)
| Title |
|---|
| PATENTS ABSTRACTS OF JAPAN, Vol. 3, No. 16 (M48) 10 February 1979 & JP, 53141840 (Tokushu) 11 December 1978 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002196A1 (en) * | 1989-07-28 | 1991-02-21 | Caterpillar Inc. | Interference connection between a heating element and body of a glow plug |
| WO2001069135A1 (en) * | 2000-03-14 | 2001-09-20 | Robert Bosch Gmbh | Sheathed element glow plug for an internal combustion engine |
| WO2005026619A1 (en) * | 2003-08-28 | 2005-03-24 | Robert Bosch Gmbh | Sheathed-element glow plug comprising a specially embedded contact element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62500258A (en) | 1987-01-29 |
| ES289122U (en) | 1986-02-16 |
| DE8427789U1 (en) | 1986-01-23 |
| ES289122Y (en) | 1986-10-01 |
| EP0194292A1 (en) | 1986-09-17 |
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