EP1034399B1 - Pencil type glow plug - Google Patents
Pencil type glow plug Download PDFInfo
- Publication number
- EP1034399B1 EP1034399B1 EP98962285A EP98962285A EP1034399B1 EP 1034399 B1 EP1034399 B1 EP 1034399B1 EP 98962285 A EP98962285 A EP 98962285A EP 98962285 A EP98962285 A EP 98962285A EP 1034399 B1 EP1034399 B1 EP 1034399B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheathed
- glow plug
- diameter
- plug housing
- annular gap
- 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
Links
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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
Definitions
- the invention relates to a glow plug Arrangement in the combustion chamber of air-compressing internal combustion engines according to the preamble of claim 1.
- Glow plugs of this type become the annular gap between Glow plug and candle case with a glow plug constant diameter in the press fit area and one Combustion chamber facing cylindrical bore in the candle housing realized. This bore is through a diameter that is larger than the interference fit diameter of the glow plug, characterized.
- PATENT ABSTRACTS OF JAPAN vol. 016, no. 161 (M-1237) and JP 04 009517 A discloses a Process for the manufacture of a glow plug, in which first arranged a glow plug in a candle case is, the glow plug first one in diameter has reduced zone, so that a convenient fit of the glow plug is reached in the candle housing.
- the resulting annular gap between glow plug and Candle case will appear after the glow plug in the candle case was arranged, as shown in Figure 3, right picture, filled with a joining agent after a soldering process. Consequently has the glow plug, which after manufacture in Combustion chamber an air-compressed internal combustion engine is arranged, no annular gap.
- the glow plug with the invention has the task of the glow plug largely thermal at the corresponding annular gap depth to decouple and thus the desired heating characteristics to ensure.
- the depth of the annular gap Adjust the lead measure. This has a large variety of parts The result of the candle housing is only the depth of the Annular gap vary.
- the main advantage is that the annular gap, in Contrary to the prior art, in the field of Press fit correspondingly offset glow plug widened diameter and a candle case without Diameter gradation is realized.
- This allows the Number of candle housings, their geometry only vary by the depth of the annular gap, on a for this feature reduces universally applicable housing become.
- a standard pen can still be used constant geometry can be used, which for Generation of the desired annular gap depth correspondingly deep is pressed into the candle housing.
- the glow plug 10 consists of an elongated, cylindrical housing 11 with a central bore 12, the has a conical extension 13 towards the upper end. Something below this extension is at the bore 12 annular paragraph 15 formed, in that the Diameter of the bore 12 somewhat above this paragraph 15 is smaller than the diameter in the following area 12 A of the bore 12.
- the Glow plug 16 In the housing 10 is the Glow plug 16 with its tip 17 in the combustion chamber Engine immerses.
- the joint connection between Glow plug and candle housing is so far with 12 A press fit constant bore diameter on the combustion chamber.
- the projection dimension of the glow plug 16 of the glow plug is defined as the distance between the radiator tip and the test diameter on the sealing cone of the candle housing.
- the glow plug 16 On the construction of the glow plug is not further received because not essential to the invention. He can go to the Hole 12 may be conveniently pressed. One in Glow tube of the glow plug arranged filament is wider not shown. The one from the candle housing 11 protruding connecting bolts 18, is used for power supply to the electric coil.
- the connecting pin 18 is by means of a radially pressed seal 20 in the upper, no further shown tubular region of the glow plug 16, fixed.
- the seal 20 seals the glow plug 16 between Glow tube and connecting pin 18 against the environment.
- the annular paragraph 15 on the housing 11 has the purpose that the Glow plug 16 together with connecting pin 18 if the pressure in the Combustion chamber not pushed up out of the housing 11 can be.
- At the top of the glow plug 16 is a seal 20 that the radiator between the glow tube and Seals connecting bolts against the environment.
- Figures 2 and 3 show the area relevant to the invention of the annular gap 21 or the annular gap zone between Candle case and glow plug. This zone is between the combustion chamber side, constant press fit diameter of the Candle case and one inside the candle case in the Outside glow plug offset. there points the area of the glow plug on the combustion chamber side below a paragraph 16 B on a smaller diameter 16 C than that of the press fit area 12 A.
- Figure 2 shows the arrangement of the Glow plug according to the invention in the candle housing for generation an annular gap depth R1.
- Figure 3 shows the arrangement of the Glow pencil according to the invention in the candle housing for generation an annular gap depth R2.
- the glow plugs according to FIGS. 2 and 3 can have the same geometry and heating characteristics have, i.e. it can be a standard glow plug Realization of different annular gap depths (here: R1> R2) and therefore also different projection dimensions be used.
- the varying annular gap depths and projection dimensions can be realized in that the Standard glow plug correspondingly deep into the press fit of the Housing 11 is pressed.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
- Spark Plugs (AREA)
Description
Die Erfindung geht aus von einer Glühstiftkerze zur Anordnung im Brennraum luftverdichtender Brennkraftmaschinen nach der Gattung des Anspruchs 1. Bei bekannten Glühstiftkerzen dieser Art wird der Ringspalt zwischen Glühstift und Kerzengehäuse durch einen Glühstift mit konstantem Durchmesser im Preßsitzbereich und einer dem Brennraum zugewandten zylindrischen Bohrung im Kerzengehäuse realisiert. Diese Bohrung ist durch einen Durchmesser, der größer als der Preßsitzdurchmesser des Glühstiftes ist, gekennzeichnet.The invention relates to a glow plug Arrangement in the combustion chamber of air-compressing internal combustion engines according to the preamble of claim 1. In known Glow plugs of this type become the annular gap between Glow plug and candle case with a glow plug constant diameter in the press fit area and one Combustion chamber facing cylindrical bore in the candle housing realized. This bore is through a diameter that is larger than the interference fit diameter of the glow plug, characterized.
PATENT ABSTRACTS OF JAPAN vol. 016, no. 161 (M-1237) und JP 04 009517 A (NGK SPARK PLUG CO LTD) offenbart ein Verfahren zur Herstellung einer Glühstiftkerze, bei dem zunächst ein Glühstift in einem Kerzengehäuse angeordnet wird, wobei der Glühstift zunächst eine im Durchmesser verringerte Zone aufweist, so dass eine bequeme Einpassung des Glühstifts in das Kerzengehäuse erreicht wird. Der dadurch entstehende Ringspalt zwischen Glühstift und Kerzengehäuse wird, nachdem der Glühstift im Kerzengehäuse angeordnet wurde, wie in Figur 3, rechtes Bild, dargestellt, durch ein Fügemittel nach einem Lötvorgang ausgefüllt. Somit weist die Glühstiftkerze, die nach der Herstellung im Brennraum eine luftverdichteten Brennkraftmaschine angeordnet wird, keinen Ringspalt auf. PATENT ABSTRACTS OF JAPAN vol. 016, no. 161 (M-1237) and JP 04 009517 A (NGK SPARK PLUG CO LTD) discloses a Process for the manufacture of a glow plug, in which first arranged a glow plug in a candle case is, the glow plug first one in diameter has reduced zone, so that a convenient fit of the glow plug is reached in the candle housing. The resulting annular gap between glow plug and Candle case will appear after the glow plug in the candle case was arranged, as shown in Figure 3, right picture, filled with a joining agent after a soldering process. Consequently has the glow plug, which after manufacture in Combustion chamber an air-compressed internal combustion engine is arranged, no annular gap.
Die erfindungsgemäße Glühstiftkerze mit den Merkmalen des Anspruchs 1 hat die Aufgabe, den Glühstift auf der entsprechenden Ringspalttiefe weitgehend thermisch zu entkoppeln und somit die gewünschte Aufheizcharakteristik zu gewährleisten. In Abhängigkeit des sogenannten Vorstehmaßes, d.h. der freien Länge des Glühstiftes von der Unterkante des Kerzengehäuses bis zur Heizkörperspitze, ist für einen Standardstift gleichbleibender Geometrie und Aufheizcharakteristik, die Tiefe des Ringspaltes dem Vorstehmaß anzupassen. Dies hat eine hohe Teilevielfalt der Kerzengehäuse zur Folge, die lediglich durch die Tiefe des Ringspaltes variieren. The glow plug with the invention Features of claim 1 has the task of the glow plug largely thermal at the corresponding annular gap depth to decouple and thus the desired heating characteristics to ensure. Depending on the so-called Measure of precedence, i.e. the free length of the glow plug from the Bottom edge of the candle housing up to the tip of the radiator for a standard pin of constant geometry and Heating characteristics, the depth of the annular gap Adjust the lead measure. This has a large variety of parts The result of the candle housing is only the depth of the Annular gap vary.
Der wesentliche Vorteil besteht darin, daß der Ringspalt, im Gegensatz zum Stand der Technik, durch einen im Bereich des Preßsitzes entsprechend abgesetzten Glühstift mit aufgeweitetem Durchmesser und einem Kerzengehäuse ohne Durchmesserabstufung realisiert wird. Dadurch kann die Anzahl der Kerzengehäuse, die in ihrer Geometrie lediglich durch die Tiefe des Ringspaltes variieren, auf ein für dieses Merkmal universell einsetzbares Gehäuse reduziert werden. Gleichzeitig kann nach wie vor ein Standardstift gleichbleibender Geometrie verwendet werden, der zur Erzeugung der gewünschten Ringspalttiefe entsprechend tief in das Kerzengehäuse eingepreßt wird.The main advantage is that the annular gap, in Contrary to the prior art, in the field of Press fit correspondingly offset glow plug widened diameter and a candle case without Diameter gradation is realized. This allows the Number of candle housings, their geometry only vary by the depth of the annular gap, on a for this feature reduces universally applicable housing become. At the same time, a standard pen can still be used constant geometry can be used, which for Generation of the desired annular gap depth correspondingly deep is pressed into the candle housing.
Die Realisierung des Ringspaltes durch einen im Bereich des Pressitzes abgesetzten Glühstift bedingt die Vergrößerung des Preßsitzdurchmessers des Glühstiftes gegenüber dem Preßsitzdurchmesser des derzeitigen Standes der Technik. Diese Durchmesseraufweitung führt zu einer Vergrößerung des zur Verfügung stehenden Bauraums für die Dichtung des Glühstiftes. Die Durchmesseraufweitung reduziert in diesem Bereich den erforderlichen Umformgrad des Glührohrs sowie der eingepreßten Dichtung. Dadurch wird die Gefahr der Rißbildung der Dichtung beim formgebenden Hämmerverfahren des Glühstiftes signifikant reduziert.The realization of the annular gap by a in the area of Pressitzes removed glow pin causes the enlargement of the interference fit diameter of the glow plug compared to Press fit diameter of the current state of the art. This widening of the diameter leads to an enlargement of the available space for sealing the Glow plug. The widening of the diameter reduces in this Area the required degree of deformation of the glow tube as well the pressed seal. This will increase the risk of Cracking of the seal during the shaping hammering process of the glow plug significantly reduced.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung
wiedergegeben. Diese zeigt in:
Die Glühstiftkerze 10 besteht aus einem langgestreckten,
zylindrischen Gehäuse 11 mit einer mittigen Bohrung 12, die
zum oberen Ende hin eine konische Erweiterung 13 hat. Etwas
unterhalb dieser Erweiterung ist an der Bohrung 12 ein
ringförmiger Absatz 15 gebildet, und zwar dadurch, daß der
Durchmesser der Bohrung 12 oberhalb dieses Absatzes 15 etwas
kleiner ist als der Durchmesser im nachfolgenden Bereich
12 A der Bohrung 12. Im Gehäuse 10 befindet sich der
Glühstift 16, der mit seiner Spitze 17 in den Brennraum der
Kraftmaschine eintaucht. Die Fügeverbindung zwischen
Glühstift und Kerzengehäuse ist bisher als Pressitz 12 A mit
konstanten brennraumseitigen Bohrungsdurchmesser ausgeführt.
Das Vorstehmaß des Glühstiftes 16 der Glühstiftkerze ist
definiert als der Abstand zwischen der Heizkörperspitze und
dem Prüfdurchmesser am Dichtkonus des Kerzengehäuses.The
Auf die Konstruktion des Glühstifts ist weiter nicht
eingegangen, da nicht erfindungswesentlich. Er kann in die
Bohrung 12 zweckmäßigerweise eingepresst sein. Eine im
Glührohr des Glühstifts angeordnete Glühwendel ist weiter
nicht dargestellt. Der aus dem Kerzengehäuse 11
hinausragende Anschlußbolzen 18, dient der Stromzuführung
zur Stromwendel. Der Anschlußbolzen 18 ist mittels einer
radial verpreßten Dichtung 20 im oberen, nicht weiter
dargestellten rohrförmigen Bereich des Glühstiftes 16,
fixiert. Die Dichtung 20 dichtet den Glühstift 16 zwischen
Glührohr und Anschlußbolzen 18 gegen die Umgebung ab. Der
ringförmige Absatz 15 am Gehäuse 11 hat den Zweck, daß der
Glühstift 16 samt Anschlußbolzen 18 bei zu hohem Druck im
Brennraum nicht nach oben aus dem Gehäuse 11 hinausgedrückt
werden kann. Am oberen Rand des Glühstifts 16 befindet sich
eine Dichtung 20, die den Heizkörper zwischen Glührohr und
Anschlußbolzen gegen die Umgebung abdichtet. On the construction of the glow plug is not further
received because not essential to the invention. He can go to the
Hole 12 may be conveniently pressed. One in
Glow tube of the glow plug arranged filament is wider
not shown. The one from the
Die Figuren 2 und 3 zeigen den erfindungsrelevanten Bereich
des Ringspalts 21 bzw. der Ringspaltzone zwischen
Kerzengehäuse und Glühstift. Diese Zone wird zwischen dem
brennraumseitigen, konstanten Preßsitzdurchmesser des
Kerzengehäuses und einem innerhalb des Kerzengehäuses im
Außendurchmesser abgesetzten Glühstift realisiert. Dabei
weist der brennraumseitige Bereich des Glühstifts unterhalb
eines Absatzes 16 B einen kleineren Durchmesser 16 C auf als
der des Preßsitzbereichs 12 A.Figures 2 and 3 show the area relevant to the invention
of the
Insbesondere die Figur 2 zeigt die Anordnung des
erfindungsgemäßen Glühstiftes im Kerzengehäuse zur Erzeugung
einer Ringspalttiefe R1. Die Figur 3 zeigt die Anordnung des
erfindungsgemäßen Glühstifts im Kerzengehäuse zur Erzeugung
einer Ringspalttiefe R2. Die Glühstifte nach Figur 2 und 3
können dieselbe Geometrie und Aufheizcharakteristik
aufweisen, d.h. es kann ein Standard-Glühstift zur
Realisierung unterschiedlicher Ringspalttiefen (hier:
R1 > R2) und damit auch unterschiedlicher Vorstehmaße
verwendet werden. Die variierenden Ringspalttiefen
und Vorstehmaße können dadurch realisiert werden, daß der
Standard-Glühstift entsprechend tief in den Preßsitz des
Gehäuses 11 eingepreßt wird.In particular, Figure 2 shows the arrangement of the
Glow plug according to the invention in the candle housing for generation
an annular gap depth R1. Figure 3 shows the arrangement of the
Glow pencil according to the invention in the candle housing for generation
an annular gap depth R2. The glow plugs according to FIGS. 2 and 3
can have the same geometry and heating characteristics
have, i.e. it can be a standard glow plug
Realization of different annular gap depths (here:
R1> R2) and therefore also different projection dimensions
be used. The varying annular gap depths
and projection dimensions can be realized in that the
Standard glow plug correspondingly deep into the press fit of the
Claims (7)
- Sheathed-element glow plug (10) for arrangement in the combustion chamber of air-compressing internal combustion engines, having a tubular, metallic plug housing (11) in the longitudinal bore (12) of which a sheathed element (16) is fixed in a sealing fashion with a part of its length, there being located at least partially between the sheathed element (16) and plug housing (11) an annular gap (21) which emerges from the end of the plug housing on the combustion chamber side, characterized in that the annular gap is formed by a zone (16C) of reduced diameter on the sheathed element (16).
- Sheathed-element glow plug according to Claim 1, characterized in that different depths (R1, R2) of annular gap and dimensions of projection can be realised by means of a single standard sheathed element of the same geometry and heating characteristic by means of a varying depth of impression of the sheathed element into the press fit of the plug housing.
- Sheathed-element glow plug according to Claim 2, characterized in that in order to implement the different depths (R1, R2) of annular gap use can be made of a single standard plug housing whose press fit and annular gap has in the direction of a combustion chamber a constant diameter or an arbitrary diameter step of constant geometry.
- Sheathed-element glow plug according to one of Claims 1 to 3, characterized in that the changing diameter at the annular edge (16B) of the sheathed element (16) has an arbitrary geometrical configuration, and the sheathed element is pressed into the plug housing in such a way that the diameter step occurs inside the plug housing.
- Sheathed-element glow plug according to one of Claims 1 to 4, characterized in that the region of the expansion of diameter of the sheathed element (16) inside the plug housing requires a lesser degree of reforming of the hot tube.
- Sheathed-element glow plug according to one of Claims 1 to 5, characterized in that the diameter step is produced on the sheathed element by, in particular, hammering, rolling, drawing or cold-impact extrusion.
- Sheathed-element glow plug according to one of Claims 1 to 6, characterized in that there is formed in the interior of the plug housing an annular edge (15) which is slightly smaller than the outside diameter of the sheathed element (16) in this region.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752920A DE19752920A1 (en) | 1997-11-28 | 1997-11-28 | Glow plug |
| DE19752920 | 1997-11-28 | ||
| PCT/DE1998/003503 WO1999028679A1 (en) | 1997-11-28 | 1998-11-30 | Pencil type glow plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1034399A1 EP1034399A1 (en) | 2000-09-13 |
| EP1034399B1 true EP1034399B1 (en) | 2002-04-10 |
Family
ID=7850183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98962285A Expired - Lifetime EP1034399B1 (en) | 1997-11-28 | 1998-11-30 | Pencil type glow plug |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1034399B1 (en) |
| JP (1) | JP4188559B2 (en) |
| DE (2) | DE19752920A1 (en) |
| ES (1) | ES2175833T3 (en) |
| WO (1) | WO1999028679A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10041282B4 (en) * | 2000-08-22 | 2005-02-10 | Beru Ag | Method for connecting a heating rod of a glow plug with its glow plug body and a corresponding glow plug |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8500986U1 (en) * | 1985-01-16 | 1985-04-25 | BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg | Glow plug |
| JP2847565B2 (en) * | 1990-04-27 | 1999-01-20 | 日本特殊陶業株式会社 | Sheath type glow plug and method of manufacturing the same |
-
1997
- 1997-11-28 DE DE19752920A patent/DE19752920A1/en not_active Withdrawn
-
1998
- 1998-11-30 JP JP2000523502A patent/JP4188559B2/en not_active Expired - Fee Related
- 1998-11-30 WO PCT/DE1998/003503 patent/WO1999028679A1/en active IP Right Grant
- 1998-11-30 ES ES98962285T patent/ES2175833T3/en not_active Expired - Lifetime
- 1998-11-30 EP EP98962285A patent/EP1034399B1/en not_active Expired - Lifetime
- 1998-11-30 DE DE59803784T patent/DE59803784D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP4188559B2 (en) | 2008-11-26 |
| DE59803784D1 (en) | 2002-05-16 |
| JP2001525529A (en) | 2001-12-11 |
| WO1999028679A1 (en) | 1999-06-10 |
| DE19752920A1 (en) | 1999-06-02 |
| EP1034399A1 (en) | 2000-09-13 |
| ES2175833T3 (en) | 2002-11-16 |
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