EP0607592B1 - Rod Flame glow plug - Google Patents
Rod Flame glow plug Download PDFInfo
- Publication number
- EP0607592B1 EP0607592B1 EP93120529A EP93120529A EP0607592B1 EP 0607592 B1 EP0607592 B1 EP 0607592B1 EP 93120529 A EP93120529 A EP 93120529A EP 93120529 A EP93120529 A EP 93120529A EP 0607592 B1 EP0607592 B1 EP 0607592B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rod
- glow plug
- coil
- heating
- control coil
- 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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
- F02N19/06—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of combustion-air by flame generating means, e.g. flame glow-plugs
Definitions
- the invention relates to a rod flame glow plug for preheating the intake air of an internal combustion engine with auto-ignition according to the preamble of claim 1.
- Such a rod flame glow plug which is known for example from DE-PS 40 07 340, is used to heat the intake air of an internal combustion engine with auto-ignition, for example a diesel engine, if starting problems would occur due to low temperatures during auto-ignition.
- Rod flame glow plugs are known in versions with one or more heating rods and with single or multiple coil combinations of control and heating coils. If an electric voltage is applied to such a rod flame glow plug, then a current flows through the combination of control and heating coils, so that the heating coil, its resistance value is almost independent of the temperature is glowing first. The heating coil is protected against overheating by heating the control coil material, which has a positive resistance temperature coefficient and therefore reduces the current via its own resistance with increasing temperature.
- control coils consist of pure nickel, i. H. Ni 99.9.
- this material has a control behavior, i. H. a resistance behavior with regard to the curtailment of the current via the temperature, which leads to relatively long heating times.
- the flat rise in the temperature curve which is responsible for the long heating-up time to the ignition temperature, does not meet the requirements for a quick start of the internal combustion engine, in particular within about 15 s, without a clock function when the generator voltage is applied.
- control coil from a CoFe alloy in the case of a rod glow plug with at least one control coil and at least one heating coil which are connected in series with one another.
- the heating and control filaments are also embedded in a filler made of MgO or AlN.
- the object on which the invention is based is therefore to create a rod-type glow plug which has a shorter heating-up time up to the ignition temperature and does not have to be clocked in order to absorb the high voltages.
- the resistance behavior with respect to the curtailment of the current against the temperature is significantly higher in the case of CoFe alloys than in the case of nickel, the resulting control factor being proportionally coupled to the temperature of the heating element.
- the heating times of a rod flame glow plug with a control coil made of a CoFe alloy according to the invention and a control coil made of Ni are shown in comparison in FIG. 3 of the associated drawing.
- a rod flame glow plug usually consists of a housing 12 with a fuel connection 13 with metering device and an electrical connection 14. Inside the housing 12 there is a heating rod which protrudes from the air-side end of the housing 12 and from there a protective tube 15 is surrounded, which connects axially to the air-side end of the housing 12. Inside the housing, the fuel supplied via the fuel connection 13 is heated, evaporated and finally ignited by means of the heating rod, which is supplied with electricity via the electrical connection 14.
- Such a rod flame glow plug is arranged in the intake air flow of an internal combustion engine in such a way that the resulting flame heats the intake air. This makes it possible to start an internal combustion engine even at temperatures which are so low that starting problems would occur in the case of auto-ignition.
- the heating element consists essentially of a glow tube 8, which is filled with a filling material 10 and in which at least one control coil 2 and a heating coil 1 are arranged, which are in the filling material 10 are embedded.
- the coils 1, 2 are connected in series with one another and welded to one another at a welding point 5 and connected to the electrical connection, ie the inner pole 9 and, in the exemplary embodiment shown in FIG. 1, via a welding lens 7 to the glow tube 8 as a ground connection.
- the heating filament consists of a material whose resistance value is almost constant over temperature, the heating filament glows 1 first.
- the heating coil 1 which then has a positive temperature coefficient and thus reduces the current via its own resistance as the temperature rises, protects the heating coil 1 against overheating.
- the control coil material is a CoFe alloy, preferably Co8Fe or Co25Fe.
- the winding spacing in the front area 4 of the control coil 2 i. H. larger at the end of the heating coil than in the remaining area of the control coil 2, which causes the control coil 2 to be curbed later by heat dissipation.
- the control coil wire changes the resistance via the temperature, the heat radiation or heat conduction of the heating coil 1 influences the control behavior of the control coil 2.
- the jump, d. H. the distance between the turns at the interconnected ends of the control coil 2 and the heating coil 1 thus also contributes to the delay in the curtailment.
- a larger winding spacing is provided than in the remaining area of the heating coil 1.
- FIG. 2 shows a higher compression of the filling material 10 by additionally reducing 6 the glow tube at the glow rod tip.
- This reduction in the tip of the glow tube 6 leads to a compression of the filler material 10 in the region of the first to third turns of the heating coil 1 and thus to an upsetting.
- the winding spacing or jump 3 in the heating coil 1 prevents the coil 1 from contacting the glow tube 8 due to the reduction 6, and furthermore prevents an undefined opening of the double block 11 shown in FIG. 1 at the end of the heating coil.
- the additional reduction with swelling of the heating wire of the heating coil 1 also results in a significantly longer service life, since the wire does not burn out as quickly due to the wire swelling.
- the filling material 10, with which the glow tube 8 is filled and in which the regulating and heating coils 1, 2 are embedded, is at least partially, ie. H. at least in the area of the heating coil 1 made of AlN, d. H. a material with high heat conduction to ensure rapid heat dissipation from the heating coil 1 to the surface of the glow tube 8.
- the filler material preferably consists of MgO, i.e. H. a material with poorer heat conduction than AlN, which has the result that on the one hand the heat of the heating coil 1 is rapidly dissipated to the outside, while on the other hand the heating of the control coil 2 is delayed by the heat of the heating coil 1.
- the complete filling can also consist of AlN if the winding spacing 4 and the winding jump between the heating and control coil 1, 2 are adapted accordingly.
- control coil consists of a CoFe alloy
- a faster heating-up time and, at the same time, security against burnout are achieved by the strong reduction.
- This effect is reinforced or supported by the fact that the winding spacings and the filling materials are selected in the manner indicated above.
Abstract
Description
Die Erfindung betrifft eine Stabflammglühkerze zum Vorwärmen der Ansaugluft einer Brennkraftmaschine mit Selbstzündung nach dem Gattungsbegriff des Anspruchs 1.The invention relates to a rod flame glow plug for preheating the intake air of an internal combustion engine with auto-ignition according to the preamble of
Eine derartige Stabflammglühkerze, die beispielsweise aus der DE-PS 40 07 340 bekannt ist, wird dazu verwandt, die Ansaugluft einer Brennkraftmaschine mit Selbstzündung beispielsweise eines Dieselmotors zu erwärmen, wenn aufgrund niedriger Temperaturen bei der Selbstzündung Startprobleme auftreten würden.Such a rod flame glow plug, which is known for example from DE-PS 40 07 340, is used to heat the intake air of an internal combustion engine with auto-ignition, for example a diesel engine, if starting problems would occur due to low temperatures during auto-ignition.
Stabflammglühkerzen sind in Ausführungen mit einem oder mehreren Heizstäben sowie mit einfachen oder mehrfachen Wendelkombinationen aus Regel- und Heizwendeln bekannt. Wenn an eine derartige Stabflammglühkerze eine elektrische Spannung gelegt wird, dann fließt ein Strom durch die Wendelkombination aus Regel- und Heizwendeln, so daß die Heizwendel, deren Widerstandswert von der Temperatur nahezu unabhängig ist, zuerst glüht. Durch die Erwärmung des Regelwendelmaterials, das einen positiven Widerstandstemperaturkoeffizienten hat und daher mit steigender Temperatur den Strom über seinen Eigenwiderstand reduziert, wird die Heizwendel gegen eine Überhitzung geschützt.Rod flame glow plugs are known in versions with one or more heating rods and with single or multiple coil combinations of control and heating coils. If an electric voltage is applied to such a rod flame glow plug, then a current flows through the combination of control and heating coils, so that the heating coil, its resistance value is almost independent of the temperature is glowing first. The heating coil is protected against overheating by heating the control coil material, which has a positive resistance temperature coefficient and therefore reduces the current via its own resistance with increasing temperature.
Üblicherweise bestehen die Regelwendeln aus Reinnickel, d. h. Ni 99,9. Dieses Material hat jedoch ein Regelverhalten, d. h. ein Widerstandsverhalten bezüglich der Abregelung des Stromes über die Temperatur, das zu relativ langen Aufheizzeiten führt. Der flache Anstieg der Temperaturkurve, der für die lange Aufheizzeit bis zur Zündtemperatur verantwortlich ist, entspricht ohne Taktfunktion beim Einsetzen der Generatorspannung nicht den Anforderungen für einen Schnellstart der Brennkraftmaschine, insbesondere innerhalb von ca. 15 s.Usually the control coils consist of pure nickel, i. H. Ni 99.9. However, this material has a control behavior, i. H. a resistance behavior with regard to the curtailment of the current via the temperature, which leads to relatively long heating times. The flat rise in the temperature curve, which is responsible for the long heating-up time to the ignition temperature, does not meet the requirements for a quick start of the internal combustion engine, in particular within about 15 s, without a clock function when the generator voltage is applied.
Aus der DE-A-4029185 ist es weiterhin bekannt, bei einer Stabglühkerze mit wenigstens einer Regelwendel und wenigstens einer Heizwendel, die in Reihe zueinander geschaltet sind, die Regelwendel aus einer CoFe-Legierung zu fertigen. Bei dieser bekannten Stabglühkerze sind weiterhin die Heiz- und die Regelwendeln in ein Füllmaterial aus MgO oder AlN eingebettet.From DE-A-4029185 it is also known to manufacture the control coil from a CoFe alloy in the case of a rod glow plug with at least one control coil and at least one heating coil which are connected in series with one another. In this known glow plug, the heating and control filaments are also embedded in a filler made of MgO or AlN.
Aus "Patent Abstracts of Japan", Bd. 6, Nr. 157 (M-150), 18. August 1982, und der JP-A-57073326 ist es weiterhin zu entnehmen, bei einer Glühkerze den Windungsabstand des Regelwiderstandes, der mit einer Heizwendel verbunden ist, im heizwendelseitigen Bereich zu erhöhen, wodurch die elektrische Leistungsdichte im Regelwiderstand in der Nähe der Heizwendel, verglichen mit dem übrigen Teil, verringert, die Temperatur an dieser Stelle herabgesetzt und dadurch ein Trennen der beiden Wendeln vermieden wird.From "Patent Abstracts of Japan", Vol. 6, No. 157 (M-150), August 18, 1982, and JP-A-57073326, it can also be seen in a glow plug the winding spacing of the variable resistor, which with a The heating coil is connected to increase in the area of the heating coil, as a result of which the electrical power density in the variable resistor in the vicinity of the heating coil is reduced compared to the rest of the part, the temperature is reduced at this point and a separation of the two coils is avoided.
Die der Erfindung zugrundeliegende Aufgabe besteht daher darin, eine Stabflammglühkerze nach dem Gattungsbegriff des Anspruchs 1 zu schaffen, die eine kürzere Aufheizzeit bis zur Zündtemperatur hat und nicht getaktet werden muß, um die hohen Spannungen abzufangen.The object on which the invention is based is therefore to create a rod-type glow plug which has a shorter heating-up time up to the ignition temperature and does not have to be clocked in order to absorb the high voltages.
Diese Aufgabe wird gemäß der Erfindung dadurch die Ausbildung gelöst, die im Kennzeichen des Anspruchs 1 angegeben ist.This object is achieved according to the invention by the training specified in the characterizing part of
Das Widerstandsverhalten bezüglich der Abregelung des Stromes gegenüber der Temperatur ist bei CoFe-Legierungen wesentlich höher als bei Nickel, wobei der sich ergebende Regelfaktor proportional mit der Temperatur des Heizstabes gekoppelt ist. Die Aufheizzeiten einer Stabflammglühkerze mit einer Regelwendel aus einer CoFe-Legierung gemäß der Erfindung und einer Regelwendel aus Ni sind im Vergleich in Fig. 3 der zugehörigen Zeichnung dargestellt.The resistance behavior with respect to the curtailment of the current against the temperature is significantly higher in the case of CoFe alloys than in the case of nickel, the resulting control factor being proportionally coupled to the temperature of the heating element. The heating times of a rod flame glow plug with a control coil made of a CoFe alloy according to the invention and a control coil made of Ni are shown in comparison in FIG. 3 of the associated drawing.
Besonders bevorzugte Ausführungsbeispiele der erfindungsgemäßen Stabflammglühkerze sind Gegenstand der Ansprüche 2 bis 8.Particularly preferred exemplary embodiments of the rod flame glow plug according to the invention are the subject of
Im folgenden werden anhand der zugehörigen Zeichnung besonders bevorzugte Ausführungsbeispiele der Erfindung näher beschrieben. Es zeigen:
- Fig. 1 eine Schnittansicht des Heizstabes bei einem ersten Ausführungsbeispiel der erfindungsgemäßen Stabflammglühkerze,
- Fig. 2 eine Schnittansicht des Heizstabes bei einem zweiten Ausführungsbeispiel der erfindungsgemäßen Stabflammglühkerze,
- Fig. 3 in einem Temperatur-Zeit-Diagramm die Aufheizzeit bei einem Ausführungsbeispiel der erfindungsgemäßen Stabflammglühkerze mit Regelwendel aus CoFe gegenüber einer üblichen Stabflammglühkerze mit Regelwendel aus Ni und
- Fig. 4 den Grundaufbau einer Stabflammglühkerze.
- 1 is a sectional view of the heating element in a first embodiment of the rod flame glow plug according to the invention,
- 2 shows a sectional view of the heating rod in a second exemplary embodiment of the rod flame glow plug according to the invention,
- Fig. 3 in a temperature-time diagram, the heating time in an embodiment of the rod-type glow plug according to the invention with control coil made of CoFe compared to a conventional rod-type glow plug with control coil made of Ni and
- Fig. 4 shows the basic structure of a rod flame glow plug.
Wie es in Fig. 4 dargestellt ist, besteht eine Stabflammglühkerze üblicherweise aus einem Gehäuse 12 mit einem Kraftstoffanschluß 13 mit Dosiereinrichtung und einem elektrischen Anschluß 14. Im Inneren des Gehäuses 12 befindet sich ein Heizstab, der vom luftseitigen Ende des Gehäuses 12 vorsteht und dort von einem Schutzrohr 15 umgeben ist, das sich axial an das luftseitige Ende des Gehäuses 12 anschließt. Im Inneren des Gehäuses wird der über den Kraftstoffanschluß 13 zugeführte Kraftstoff mittels des Heizstabes, der über den elektrischen Anschluß 14 mit Strom versorgt wird, erwärmt, verdampft und schließlich gezündet. Eine derartige Stabflammglühkerze ist im Ansaugluftstrom einer Brennkraftmaschine so angeordnet, daß die dabei entstehende Flamme die Ansaugluft erwärmt. Dadurch ist ein Start einer Brennkraftmaschine auch bei Temperaturen möglich, die so niedrig sind, daß bei Selbstzündung Startprobleme auftreten würden.As shown in Fig. 4, a rod flame glow plug usually consists of a housing 12 with a
Wie es in Fig. 1 dargestellt ist, besteht der Heizstab im wesentlichen aus einem Glührohr 8, das mit einem Füllmaterial 10 gefüllt ist und in dem wenigstens eine Regelwendel 2 und eine Heizwendel 1 angeordnet sind, die in das Füllmaterial 10 eingebettet sind. Die Wendeln 1, 2 sind in Reihe zueinander geschaltet und an einem Schweißpunkt 5 miteinander verschweißt sowie mit dem elektrischen Anschluß, d. h. dem Innenpol 9 sowie bei dem in Fig. 1 dargestellten Ausführungsbeispiel über eine Schweißlinse 7 mit dem Glührohr 8 als Masseanschluß verbunden.As shown in Fig. 1, the heating element consists essentially of a
Wenn eine elektrische Spannung zwischen dem Innenpol 9 und dem Glührohr 8 liegt, dann fließt ein Strom durch die Wendelkombination der Heiz- und Glühwendeln 1 und 2. Da die Heizwendel aus einem Material besteht, dessen Widerstandswert über die Temperatur nahezu konstant ist, glüht die Heizwendel 1 zuerst. Durch die dann einsetzende Erwärmung des Regelwendelmaterials, das einen positiven Temperaturkoeffizienten hat und somit mit steigender Temperatur den Strom über seinen Eigenwiderstand reduziert, wird die Heizwendel 1 gegenüber einer Überhitzung geschützt. Das Regelwendelmaterial ist eine CoFe-Legierung, vorzugsweise Co8Fe oder Co25Fe.If there is an electrical voltage between the
Wie es weiterhin in Fig. 1 dargestellt ist, ist der Windungsabstand im vorderen Bereich 4 der Regelwendel 2, d. h. am heizwendelseitigen Ende größer als im übrigen Bereich der Regelwendel 2, was eine spätere Abregelung der Regelwendel 2 durch Wärmeabführung bewirkt. Da der Regelwendeldraht über die Temperatur den Widerstand verändert, beeinflußt die Wärmeabstrahlung bzw. Wärmeleitung der Heizwendel 1 das Regelverhalten der Regelwendel 2. Für dieses Regelverhalten sind daher sowohl der Abstand zwischen den einzelnen Regelwendelwindungen sowie der Abstand zwischen der Heiz- und der Regelwendel 1, 2 ausschlaggebend. Der Sprung, d. h. der Abstand zwischen den Windungen an den miteinander verbundenen Enden der Regelwendel 2 und der Heizwendel 1 trägt somit gleichfalls zur Verzögerung der Abregelung bei.As is also shown in FIG. 1, the winding spacing in the
Wie es in Fig. 1 weiterhin dargestellt ist, ist auch bei der Heizwendel 1 an einem bestimmten Bereich, nämlich am vorderen Bereich der Heizwendel 1, d. h. am luftseitigen Ende, an dem die Heizwendel 1 mit dem Glührohr 8 verschweißt ist ein größerer Windungsabstand als am übrigen Bereich der Heizwendel 1 vorgesehen. Dadurch wird eine bessere Wärmeverteilung und eine bessere Befüllung mit der Füllmasse 10 erreicht und ergibt sich die Möglichkeit, gemäß Fig. 2 durch ein zusätzliches Anreduzieren 6 des Glührohres an der Glühstabspitze eine höhere Verdichtung des Füllmaterials 10 zu erreichen. Dieses Anreduzieren der Spitze des Glührohrs 6 führt zu einer Verdichtung des Füllmaterials 10 im Bereich der ersten bis dritten Windung der Heizwendel 1 und damit zu einer Aufstauchung. Durch den Windungsabstand oder Sprung 3 in der Heizwendel 1 wird verhindert, daß durch das Reduzieren 6 die Wendel 1 am Glührohr 8 anliegt, und wird weiterhin ein nicht definiertes Aufgehen des in Fig. 1 dargestellten Doppelblocks 11 am Heizwendelende verhindert.As is also shown in Fig. 1, is also in the
Die zusätzliche Anreduzierung mit Aufstauchung des Heizdrahtes der Heizwendel 1 ergibt darüberhinaus eine wesentlich höhere Lebensdauer, da der Draht aufgrund der Drahtaufstauchung nicht so schnell durchbrennt.The additional reduction with swelling of the heating wire of the
Das Füllmaterial 10, mit dem das Glührohr 8 befüllt ist und in das die Regel- und Heizwendeln 1, 2 eingebettet sind, besteht wenigstens teilweise, d. h. wenigstens im Bereich der Heizwendel 1 aus AlN, d. h. einem Material mit hoher Wärmeleitung, um für eine schnelle Wärmeabführung von der Heizwendel 1 zur Oberfläche des Glührohres 8 zu sorgen. Im Regelwendelbereich 2 besteht das Füllmaterial vorzugsweise aus MgO, d. h. einem Material mit schlechterer Wärmeleitung als AlN, was zur Folge hat, daß einerseits die Wärme der Heizwendel 1 schnell nach außen abgeführt wird, während andererseits die Erwärmung der Regelwendel 2 durch die Wärme der Heizwendel 1 verzögert ist.The filling
Es ist auch möglich, sowohl den Heizwendelbereich als auch den Regelwendelbereich mit AlN zu befüllen und im Zwischenraum zwischen der Heiz- und der Regelwendel 1, 2 ein Füllmaterial aus MgO vorzusehen.It is also possible to fill both the heating coil area and the control coil area with AlN and in the intermediate space to provide a filling material made of MgO between the heating coil and the
Schließlich kann auch die komplette Füllung aus AlN bestehen, wenn der Windungsabstand 4 und der Windungssprung zwischen der Heiz- und der Regelwendel 1, 2 entsprechend angepaßt werden.Finally, the complete filling can also consist of AlN if the
Bei der erfindungsgemäßen Stabflammglühkerze, bei der die Regelwendel aus einer CoFe-Legierung besteht, wird somit durch die starke Abregelung eine schnellere Aufheizzeit bei gleichzeitiger Sicherheit gegen ein Durchbrennen erzielt. Dieser Effekt wird dadurch verstärkt oder unterstützt, daß die Windungsabstände und die Füllmaterialien in der oben angegebenen Weise gewählt werden.In the case of the rod flame glow plug according to the invention, in which the control coil consists of a CoFe alloy, a faster heating-up time and, at the same time, security against burnout are achieved by the strong reduction. This effect is reinforced or supported by the fact that the winding spacings and the filling materials are selected in the manner indicated above.
Die Anreduzierung bewirkt eine Verdichtung des Füllmaterials bei gleichzeitiger Aufstauchung des Heizdrahtes, wobei die Verdichtung einerseits eine bessere Wärmeabfuhr und andererseits ein Herauspressen des Sauerstoffes bewirkt, der sonst zur Zerstörung der Wendelelemente führen könnte.The reduction results in a compression of the filling material with simultaneous upsetting of the heating wire, the compression on the one hand causing better heat dissipation and on the other hand pressing out the oxygen, which could otherwise destroy the helix elements.
Claims (8)
- Rod-type flame glow plug for preheating the intake air of an internal combustion engine with auto-ignition having- a housing (12) which has a fuel connection (13), having a metering device, and an electrical connection (14), and- at least one heating rod which is arranged in the housing (12) and is formed from a glow tube (8) filled with a filler (10) and from at least one control coil (2) and at least one heating coil (1) which are embedded in the filler (10) and are connected in series with one another to the electrical connection (14),characterised in that the control coil (2) comprises a CoFe alloy and the turn spacing of the control coil (2) is greater in the region of the heating coil than it is in the remaining region so that the regulating behaviour of the control coil (2) is delayed by heat dissipation compared with a control coil having a constant turn spacing.
- Rod-type flame glow plug according to claim 1, characterised in that the CoFe alloy is Co8Fe.
- Rod-type flame glow plug according to claim 1, characterised in that the CoFe alloy is Co25Fe.
- Rod-type flame glow plug according to any one of the preceding claims, characterised in that the heating coil (1) is welded at one end to the glow tube (8) and the turn spacing of the heating coil (1) is greater in the region of that end than it is in the remaining region.
- Rod-type flame glow plug according to any one of the preceding claims, characterised in that the filler (10) is AlN at least in the region of the heating coil.
- Rod-type flame glow plug according to claim 5, characterised in that the filler in the region of the control coil is MgO.
- Rod-type flame glow plug according to claim 5, characterised in that the filler is AlN both in the region of the heating coil and in the region of the control coil and a filler of MgO is provided between the heating coil and the control coil.
- Rod-type flame glow plug according to any one of the preceding claims, characterised by a diameter reduction (6) in the glow tube tip.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4301252 | 1993-01-19 | ||
| DE4301252A DE4301252A1 (en) | 1993-01-19 | 1993-01-19 | Pole flame glow plug |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0607592A2 EP0607592A2 (en) | 1994-07-27 |
| EP0607592A3 EP0607592A3 (en) | 1995-04-19 |
| EP0607592B1 true EP0607592B1 (en) | 1997-07-09 |
Family
ID=6478456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93120529A Expired - Lifetime EP0607592B1 (en) | 1993-01-19 | 1993-12-20 | Rod Flame glow plug |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5468933A (en) |
| EP (1) | EP0607592B1 (en) |
| AT (1) | ATE155222T1 (en) |
| DE (2) | DE4301252A1 (en) |
| ES (1) | ES2105062T3 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29506974U1 (en) * | 1995-04-26 | 1995-07-06 | Vacuumschmelze Gmbh | Material for the control coil of a glow plug |
| DE19630402C2 (en) * | 1996-07-26 | 2000-12-28 | Beru Ag | Pole flame glow plug |
| DE10041289B4 (en) * | 2000-08-22 | 2005-05-04 | Beru Ag | glow plug |
| DE10248804A1 (en) * | 2002-10-19 | 2004-04-29 | Robert Bosch Gmbh | Multiple filament for glow plugs |
| DE102005029837A1 (en) * | 2005-06-27 | 2007-01-04 | Robert Bosch Gmbh | glow plug |
| DE102008015402B3 (en) * | 2008-03-22 | 2009-10-22 | Beru Ag | Glow plug for diesel engine, has regulating coil and heating coil adjacent to regulating coil, where regulating coil has two sections between which third section is provided |
| DE102008015598A1 (en) * | 2008-03-26 | 2009-10-01 | Robert Bosch Gmbh | glow plug |
| DE102008043228A1 (en) * | 2008-10-28 | 2010-04-29 | Hilti Aktiengesellschaft | Internal combustion setting device |
| JP6279925B2 (en) * | 2014-02-14 | 2018-02-14 | 日本特殊陶業株式会社 | Glow plug |
| JP6537893B2 (en) * | 2015-05-28 | 2019-07-03 | 日本特殊陶業株式会社 | Glow plug |
| JP6771964B2 (en) * | 2015-10-30 | 2020-10-21 | 日本特殊陶業株式会社 | Glow plug manufacturing method and glow plug |
| JP2019045109A (en) * | 2017-09-06 | 2019-03-22 | 日本特殊陶業株式会社 | Glow plug |
| JP7090570B2 (en) * | 2019-02-27 | 2022-06-24 | 日本特殊陶業株式会社 | Glow plug |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5773326A (en) * | 1980-10-22 | 1982-05-08 | Ngk Spark Plug Co Ltd | Sheathed glow plug |
| DE4007340C1 (en) * | 1990-03-08 | 1990-10-11 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
| DE4010479A1 (en) * | 1990-03-31 | 1991-10-02 | Bosch Gmbh Robert | GLOW PLUG FOR INTERNAL COMBUSTION ENGINES |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3035291A1 (en) * | 1978-01-21 | 1982-04-22 | Beru-Werk Albert Ruprecht Gmbh & Co Kg, 7140 Ludwigsburg | Compression ignition IC engine glow plug - has tubular boss with portion of reduced diameter containing heater element |
| DE3136852A1 (en) * | 1980-10-30 | 1982-06-16 | Beru-Werk Albert Ruprecht Gmbh & Co Kg, 7140 Ludwigsburg | FLAME GLOW CANDLE FOR INTERNAL COMBUSTION ENGINES |
| DE3309133A1 (en) * | 1983-03-15 | 1984-09-20 | Robert Bosch Gmbh, 7000 Stuttgart | FLAME GLOW PEN CANDLE FOR PREHEATING THE INTAKE AIR OF COMBUSTION ENGINES |
| JPS61104582A (en) * | 1984-10-25 | 1986-05-22 | 株式会社デンソー | Sheathed heater |
| JPS6237622A (en) * | 1985-08-07 | 1987-02-18 | Nippon Denso Co Ltd | Starting burner for diesel engine |
| GB2216952B (en) * | 1988-03-16 | 1991-10-02 | Wellman Automotive Products Li | Glow plugs |
| GB2220446B (en) * | 1988-04-06 | 1992-05-27 | Champion Spark Plug Europ | Glow plug for internal combustion engine |
| DE3825013A1 (en) * | 1988-07-22 | 1990-01-25 | Beru Werk Ruprecht Gmbh Co A | Heater plug |
| DE8809396U1 (en) * | 1988-07-22 | 1989-11-16 | Beru Ruprecht Gmbh & Co Kg, 7140 Ludwigsburg, De | |
| DE3825012A1 (en) * | 1988-07-22 | 1990-01-25 | Beru Werk Ruprecht Gmbh Co A | MATERIAL FOR AN ELECTRICAL RESISTANCE ELEMENT WITH POSITIVE TEMPERATURE COEFFICIENT |
| JPH0814376B2 (en) * | 1989-09-11 | 1996-02-14 | 自動車機器株式会社 | Self temperature control glow plug |
| JP2852552B2 (en) * | 1990-04-16 | 1999-02-03 | 自動車機器株式会社 | Sheath heater and method of manufacturing the same |
| DE4014356A1 (en) * | 1990-05-04 | 1991-11-07 | Beru Werk Ruprecht Gmbh Co A | GLOW PLUG |
| DE4029185C2 (en) * | 1990-09-14 | 1997-11-06 | Vacuumschmelze Gmbh | Glow plug |
| JP2570481Y2 (en) * | 1991-05-30 | 1998-05-06 | 自動車機器株式会社 | Self-temperature control glow plug |
-
1993
- 1993-01-19 DE DE4301252A patent/DE4301252A1/en not_active Withdrawn
- 1993-12-20 EP EP93120529A patent/EP0607592B1/en not_active Expired - Lifetime
- 1993-12-20 DE DE59306880T patent/DE59306880D1/en not_active Expired - Lifetime
- 1993-12-20 ES ES93120529T patent/ES2105062T3/en not_active Expired - Lifetime
- 1993-12-20 AT AT93120529T patent/ATE155222T1/en not_active IP Right Cessation
-
1994
- 1994-01-19 US US08/183,341 patent/US5468933A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5773326A (en) * | 1980-10-22 | 1982-05-08 | Ngk Spark Plug Co Ltd | Sheathed glow plug |
| DE4007340C1 (en) * | 1990-03-08 | 1990-10-11 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
| DE4010479A1 (en) * | 1990-03-31 | 1991-10-02 | Bosch Gmbh Robert | GLOW PLUG FOR INTERNAL COMBUSTION ENGINES |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 6, no. 37 (M - 150) 18 August 1982 (1982-08-18) * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE155222T1 (en) | 1997-07-15 |
| EP0607592A2 (en) | 1994-07-27 |
| DE4301252A1 (en) | 1994-07-21 |
| EP0607592A3 (en) | 1995-04-19 |
| ES2105062T3 (en) | 1997-10-16 |
| US5468933A (en) | 1995-11-21 |
| DE59306880D1 (en) | 1997-08-14 |
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