EP1567806A1 - Multispiral for a pre-heating pencil spark plug - Google Patents

Multispiral for a pre-heating pencil spark plug

Info

Publication number
EP1567806A1
EP1567806A1 EP03808242A EP03808242A EP1567806A1 EP 1567806 A1 EP1567806 A1 EP 1567806A1 EP 03808242 A EP03808242 A EP 03808242A EP 03808242 A EP03808242 A EP 03808242A EP 1567806 A1 EP1567806 A1 EP 1567806A1
Authority
EP
European Patent Office
Prior art keywords
heating
coil
glow
housing
glow plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03808242A
Other languages
German (de)
French (fr)
Other versions
EP1567806B1 (en
Inventor
Andreas Reissner
Vera Wein
Steffen Carbon
Rainer Bach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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 EP1567806A1 publication Critical patent/EP1567806A1/en
Application granted granted Critical
Publication of EP1567806B1 publication Critical patent/EP1567806B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • 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
    • F23Q7/22—Details

Definitions

  • the invention relates to a glow plug, in particular for fuel engines, consisting essentially of a housing, a radiator arranged on the housing with a heating and regulating coil arranged in the glow tube, this heating and regulating coil being able to be supplied with current via a connecting bolt arranged in the housing.
  • Glow plugs are usually provided for passenger cars and, in some cases, for trucks. These protrude at least with part of the radiator into the combustion chamber of the engine and so warm the combustion chamber before the engine is actually started and in Cold run accordingly.
  • the fuel can also ignite on the hot surface of the glow plug.
  • the glow plugs are generally constructed in such a way that they consist of a candle housing on which a glow tube or a tubular heater is arranged. Inside the tubular heater, which consists of a hot gas corrosion-resistant material, a filament is arranged, which is embedded in a compressed magnesium oxide powder.
  • the incandescent filament generally consists of two resistors connected in series, namely a so-called regulating filament and a heating filament.
  • the heating coil has an electrical resistance that is almost independent of the temperature, and the control coil consists of a material with a so-called positive temperature coefficient (PTC).
  • PTC positive temperature coefficient
  • the object of the invention is to concentrate the heating power on the glow tube tip of the glow plug and to make it accessible for vehicle electrical system voltages of 42 V.
  • the essence of the invention is to accommodate more heating wire and thus more electrical resistance in the same space by means of multiple turns. So far glow plugs have only single coiled filaments.
  • the heating coil, the control coil or both can be wound several times depending on the requirement.
  • the advantage of arranging more heating wire in a small space is that the heating power can be increased, especially at the tip of the glow tube.
  • more wire in a small space also means that a higher resistance is achieved and therefore higher voltages are possible, especially for those that are designed for the planned 42 V on-board electrical system.
  • the coils can advantageously be designed in different ways, in that the individual winding diameters of the individual coils are generated either in the same direction or in the opposite winding direction.
  • FIG. 1 shows a section through a glow plug according to the invention with a heating coil wound several times on the tip of the glow tube;
  • FIG. 2 shows an exemplary embodiment of a possible course of a heating coil shown in FIG. 1, wound several times;
  • FIG. 3 shows a schematic representation of the current profile of the multiple winding of the helix shown in FIG. 2, the windings running against one another;
  • Figure 4 is a schematic plan view with the same winding sense
  • FIG. 5 shows a schematic plan view with the winding direction of the middle layer rotated
  • FIG 1 the structure of a glow plug 1 is shown.
  • This glow plug 1 consists of a housing 2 and a glow tube 3 arranged on the housing.
  • a heating and regulating coil 4 is arranged within the glow tube 3, the heating coil 5 being located in the region of the glow plug tip 6 and the regulating coil 7 in the part lying above it.
  • the heating and control coil 4 receives the corresponding power supply via a connecting bolt 8.
  • the heating coil 5 is wound several times.
  • FIG. 2 shows an enlarged illustration of the heating coil 5 shown in FIG. 1.
  • a diameter d1 is started first, the further winding beginning with a larger coil diameter such as d2 immediately at the end of the first coil.
  • the third coil starts with a diameter like d3 at the end of the coil 2, so that a current profile as shown in FIGS. 3 and 4 is created.
  • the spiral layers can be applied in the same winding direction. In this case it is not possible to wind so tightly because the individual turns cross each other.
  • the winding direction can be turned in any position.
  • the further coil preferably lies in the furrows of the adjacent coil. In this way it is possible to keep the outer diameter smaller compared to the type of winding shown in FIG.

Abstract

The invention relates to a pre-heating pencil spark plug, in particular for internal combustion engines. Said spark plug consists of a housing and a hot tube mounted thereon and comprising a heating and control spiral arranged inside said hot tube. The inventive heating and control spiral can be powered with the aid of a connecting bolt arranged in the housing. Said control spiral (7) or heating spiral (4) or heating and control spiral (4) can be embodied in such a way that they are multiturn.

Description

Mehrfachwendel für GlühstiftkerzenMultiple filament for glow plugs
Die Erfindung betrifft eine Glühstiftkerze, insbesondere für Brennstoffkraftmaschinen, bestehend im wesentlichen aus einem Gehäuse, einen an dem Gehäuse angeordneten Heizkörper mit einer im Glührohr angeordneten Heiz- und Regelwendel, wobei diese Heiz- und Regelwendel über ein im Gehäuse angeordneten Anschlussbolzen mit Strom beaufschlagbar ist.The invention relates to a glow plug, in particular for fuel engines, consisting essentially of a housing, a radiator arranged on the housing with a heating and regulating coil arranged in the glow tube, this heating and regulating coil being able to be supplied with current via a connecting bolt arranged in the housing.
Stand der TechnikState of the art
Brennkraftmaschinen, insbesondere Dieselmotoren benötigen für Start und Warmlaufverhalten insbesondere bei tiefen Temperaturen eine zusätzliche Wärmequelle, die entweder das Gasgemisch, die An- saugluft oder den Brennraum vorwärmt.Internal combustion engines, in particular diesel engines, require an additional heat source for starting and warming-up behavior, especially at low temperatures, which preheats either the gas mixture, the intake air or the combustion chamber.
Bei Personenkraftwagen und zum Teil bei Lastkraftwagen sind hier in der Regel Glühstiftkerzen vorgesehen. Diese ragen zumindest mit einem Teil des Heizkörpers in den Brennraum des Motors und wärmen den Brennraum so vor dem eigentlichen Start des Motors und im Kaltlauf entsprechend auf. Außerdem kann sich der Kraftstoff an der heißen Oberfläche der Glühstiftkerze entzünden.Glow plugs are usually provided for passenger cars and, in some cases, for trucks. These protrude at least with part of the radiator into the combustion chamber of the engine and so warm the combustion chamber before the engine is actually started and in Cold run accordingly. The fuel can also ignite on the hot surface of the glow plug.
Die Glühstiftkerzen sind im allgemeinen derart aufgebaut, dass sie aus einem Kerzengehäuse bestehen, an dem ein Glührohr oder ein Rohrheizkörper angeordnet ist. Innerhalb des Rohrheizkörpers der aus einem Heißgas-korrosionsbeständigen Material besteht, ist eine Glühwendel angeordnet, die in einem verdichteten Magnesium-Oxid- Pulver eingebettet ist. Die Glühwendel besteht in der Regel aus zwei in Reihe geschalteten Widerständen, nämlich einer sogenannten Regelwendel und einer Heizwendel. Die Heizwendel weist einen nahezu von der Temperatur unabhängig elektrischen Widerstand auf und die Regelwendel besteht aus einem Material mit einem sogenannten positiven Temperaturkoeffizienten (PTC) . Die Heizwendel ist zur Kontaktierung masseseitig in die Kuppe des Glührohrs eingeschweißt, die Regelwendel ist am Anschlussbolzen kontaktiert, über den der Anschluss an das Bordnetz erfolgt.The glow plugs are generally constructed in such a way that they consist of a candle housing on which a glow tube or a tubular heater is arranged. Inside the tubular heater, which consists of a hot gas corrosion-resistant material, a filament is arranged, which is embedded in a compressed magnesium oxide powder. The incandescent filament generally consists of two resistors connected in series, namely a so-called regulating filament and a heating filament. The heating coil has an electrical resistance that is almost independent of the temperature, and the control coil consists of a material with a so-called positive temperature coefficient (PTC). The heating coil is welded into the dome of the glow tube on the ground side for contacting, the control coil is contacted on the connection bolt, via which the connection to the vehicle electrical system is made.
Beim Anlegen der Spannung an die Glühkerze wird zunächst der größ- te Teil der elektrischen Energie in der Heizwendel in Wärme umgesetzt; die Temperatur an der Spitze der Kerze steigt damit steil an. Die Temperatur der Regelwendel erhöht sich zeitlich verzögert und damit auch der Widerstand. Die Stromaufnahme und somit die Gesamtleistung der Glühstiftkerze verringert sich und die Temperatur nähert sich einem Beharrungszustand. Zur Zeit befinden sich Glühstiftkerzen im Handel, die für ein Bordnetz von 12 V bzw. 24 V ausgelegt sind.When the voltage is applied to the glow plug, most of the electrical energy in the heating coil is first converted into heat; the temperature at the tip of the candle rises steeply. The temperature of the control coil increases with a time delay, and with it the resistance. The current consumption and thus the overall performance of the glow plug is reduced and the temperature approaches a steady state. There are currently glow plugs on the market that are designed for a 12 V or 24 V electrical system.
Aufgabe der ErfindungObject of the invention
Die Aufgabe der Erfindung ist es, die Heizleistung auf die Glührohrspitze der Glühstiftkerze zu konzentrieren und diese noch für Bordnetzspannungen von 42 V zugänglich zu machen. Lösung der AufgabeThe object of the invention is to concentrate the heating power on the glow tube tip of the glow plug and to make it accessible for vehicle electrical system voltages of 42 V. Solution of the task
Der Kern der Erfindung ist es, durch Mehrfachwindungen mehr Heizdraht und damit mehr elektrischen Widerstand auf gleichem Raum unterzubringen. Bisher übliche Glühstiftkerzen haben nur einfach gewickelte Wendeln. Bei der erfindungsgemäßen Glühstiftkerze können die Heizwendel, die Regelwendel oder auch beide je nach Anforderung mehrfach gewickelt sein.The essence of the invention is to accommodate more heating wire and thus more electrical resistance in the same space by means of multiple turns. So far glow plugs have only single coiled filaments. In the glow plug according to the invention, the heating coil, the control coil or both can be wound several times depending on the requirement.
Vorteile der ErfindungAdvantages of the invention
Der Vorteil, mehr Heizdraht auf engem Raum anzuordnen, besteht darin, dass die Heizleistung insbesondere an der Glührohrspitze erhöht werden kann.The advantage of arranging more heating wire in a small space is that the heating power can be increased, especially at the tip of the glow tube.
Mehr Draht auf engem Raum bedeutet ebenfalls in Bezug auf Heiz- und Regelwendel, dass ein höherer Widerstand erreicht wird und da- durch auch höhere Spannungen möglich sind, insbesondere für solche, die für das geplante 42 V - Bordnetz ausgelegt sind.With regard to heating and control coils, more wire in a small space also means that a higher resistance is achieved and therefore higher voltages are possible, especially for those that are designed for the planned 42 V on-board electrical system.
Vorteilhafter Weise können die Wendeln auf unterschiedliche Art gestaltet werden, in dem die einzelnen Wicklungsdurchmesser der einzelnen Wendeln entweder gleichsinnig oder in umgedrehter Wik- kelrichtung erzeugt werden.The coils can advantageously be designed in different ways, in that the individual winding diameters of the individual coils are generated either in the same direction or in the opposite winding direction.
Insbesondere bei umgedrehter Wickelrichtung entsteht der Vorteil, dass die Gesamtwendel einen geringeren Außendurchmesser aufweist und daher eine sehr kompakte Bauweise erreicht wird, die ebenfalls den Vorteil hat, bereits bestehende Glührohre nicht ändern zu müssen. Weitere vorteilhafte Ausgestaltungen gehen aus der nachfolgenden Beschreibung, den Zeichnungen sowie den Ansprüchen hervor.In particular when the winding direction is reversed, there is the advantage that the overall coil has a smaller outside diameter and therefore a very compact design is achieved, which also has the advantage of not having to change existing glow tubes. Further advantageous embodiments emerge from the following description, the drawings and the claims.
Zeichnungendrawings
Es zeigen:Show it:
Figur 1 Einen Schnitt durch einen erfindungsgemäße Glühstift- kerze mit einer an der Glührohrspitze mehrfach gewik- kelte Heizwendel;1 shows a section through a glow plug according to the invention with a heating coil wound several times on the tip of the glow tube;
Figur 2 Ein Ausführungsbeispiel eines möglichen Verlaufs einer in Figur 1 dargestellten Heizwendel, mehrfach gewik- kelt;FIG. 2 shows an exemplary embodiment of a possible course of a heating coil shown in FIG. 1, wound several times;
Figur 3 Schematische Darstellung des Stromverlaufs der in Figur 2 dargestellten Mehrfachwicklung der Wendel, wobei die Wicklungen gegeneinander verlaufen;3 shows a schematic representation of the current profile of the multiple winding of the helix shown in FIG. 2, the windings running against one another;
Figur 4 Eine schematische Draufsicht bei gleichem Wicklungssinn;Figure 4 is a schematic plan view with the same winding sense;
Figur 5 Eine schematische Draufsicht bei gedrehtem Wicklungs- sinn der Mittellage;FIG. 5 shows a schematic plan view with the winding direction of the middle layer rotated;
Figur 6 Zweilagiges Beispiel: gleicher Wicklungssinn;Figure 6 Two-layer example: same winding sense;
Figur 7 Zweilagiges Beispiel: gedrehter Wicklungssinn. Beschreibung der AusführungsbeispieleFigure 7 Two-layer example: rotated sense of winding. Description of the embodiments
In Figur 1 ist der Aufbau einer Glühstiftkerze 1 dargestellt. Diese Glühstiftkerze 1 besteht aus einem Gehäuse 2 und einem an dem Gehäuse angeordneten Glührohr 3. Innerhalb des Glührohrs 3 ist eine Heiz- und Regelwendel 4 angeordnet, wobei die Heizwendel 5 sich im Bereich der Glühstiftspitze 6 und die Regelwendel 7 im darüber liegenden Teil befindet. Über einen Anschlussbolzen 8 erhält die Heiz- und Regelwendel 4 die entsprechende Stromversorgung.In Figure 1, the structure of a glow plug 1 is shown. This glow plug 1 consists of a housing 2 and a glow tube 3 arranged on the housing. A heating and regulating coil 4 is arranged within the glow tube 3, the heating coil 5 being located in the region of the glow plug tip 6 and the regulating coil 7 in the part lying above it. The heating and control coil 4 receives the corresponding power supply via a connecting bolt 8.
Erfindungsgemäß wird vorgeschlagen, so wie es auch in Figur 1 dar- gestellt ist, zumindest einen Teil, entweder die Heizwendel 5 oder die Regelwendel 7, mehrfach zu wickeln.According to the invention, it is proposed, as is also shown in FIG. 1, to wind at least a part, either the heating coil 5 or the control coil 7, several times.
Bei dem in Figur 1 dargestellten Ausführungsbeispiel ist die Heizwendel 5 mehrfach gewickelt.In the embodiment shown in Figure 1, the heating coil 5 is wound several times.
Dabei gibt es unterschiedliche Ausführungsformen, die Mehrfachwicklung der Regelwendel 7 oder der Heizwendel 5 durchzuführen.There are different embodiments for carrying out the multiple winding of the control coil 7 or the heating coil 5.
In Figur 2 ist eine vergrößerte Darstellung der in Figur 1 dargestellten Heizwendel 5 gezeigt. Bei der Herstellung der Heizwendel 5 wird zuerst mit einem Durchmesser dl begonnen, wobei die weitere Wicklung mit einem größeren Wendeldurchmesser wie d2 unmittelbar am Ende der ersten Wendel ansetzt. Die dritte Wendel setzt mit ei- nem Durchmesser wie d3 am Ende der Wendel 2 an, so dass ein Stromverlauf, wie er in den Figuren 3 und 4 dargestellt ist, entsteht. Die Wendellagen können im gleichen Wicklungssinn aufgebracht werden. In diesem Fall kann nicht so eng gewickelt werden, da die einzelnen Windungen sich überkreuzen. Es gilt: wd3>wd2+dd>wdl+dd. Alternativ kann der Wicklungssinn in jeder Lage gedreht werden. Dabei liegt die weitere Wendel vorzugsweise in den Furchen der angrenzenden Wendel. Auf diese Weise ist es möglich, den äußeren Durchmesser im Vergleichzu der Wicklungsart gemäß Fig. 2 kleiner zu halten.FIG. 2 shows an enlarged illustration of the heating coil 5 shown in FIG. 1. In the manufacture of the heating coil 5, a diameter d1 is started first, the further winding beginning with a larger coil diameter such as d2 immediately at the end of the first coil. The third coil starts with a diameter like d3 at the end of the coil 2, so that a current profile as shown in FIGS. 3 and 4 is created. The spiral layers can be applied in the same winding direction. In this case it is not possible to wind so tightly because the individual turns cross each other. The following applies: wd3> wd2 + dd> wdl + dd. Alternatively, the winding direction can be turned in any position. The further coil preferably lies in the furrows of the adjacent coil. In this way it is possible to keep the outer diameter smaller compared to the type of winding shown in FIG.
Durch die einfache Ausgestaltung einer Mehrfachwendel wird eine hohe leistungsfähige Glühstiftkerze erzielt. The simple design of a multiple filament achieves a high-performance glow plug.

Claims

A N S P R Ü C H E EXPECTATIONS
1. Glühstiftkerze, insbesondere für Brennstoffkraftmaschinen, bestehend im wesentlichen aus einem Gehäuse, einem an dem Gehäuse angeordnetes Glührohr mit einer im Glührohr angeord- neten Heiz- und Regelwenden, wobei diese Heiz- und Regelwendel über einen im Gehäuse angeordneten Anschlussbolzen mit Strom beaufschlagbar ist, dadurch gekennzeichnet, dass wahlweise die Regelwendel (7) oder die Heizwendel (5) oder die Heiz- und Regelwendel (4) mehrfach gewickelt sind.1. Glow plug, in particular for fuel engines, consisting essentially of a housing, a glow tube arranged on the housing with a heating and regulating coil arranged in the glow tube, this heating and regulating coil being able to be supplied with current via a connecting bolt arranged in the housing, characterized in that either the control coil (7) or the heating coil (5) or the heating and control coil (4) are wound several times.
Glühstiftkerze nach Anspruch 1, dadurch gekennzeichnet, dass der Wicklungsdurchmesser der ersten Wendel der kleinste Durchmesser (wdl) ist und die weiteren Wicklungen jeweils einen größeren Durchmesser (wd2, wd3, wdn) aufweisen.Glow plug according to claim 1, characterized in that the winding diameter of the first coil is the smallest diameter (wdl) and the further windings each have a larger diameter (wd2, wd3, wdn).
Glühstiftkerze nach Anspruch 2, dadurch gekennzeichnet, dass die Wendeln der mit den einzelnen Wendeldurchmessern (wdl, wd2, wd3, wdn) gleichsinnig gewickelt sind.Glow plug according to claim 2, characterized in that the coils of the individual coil diameters (wdl, wd2, wd3, wdn) are wound in the same direction.
4. Glühstiftkerze nach Anspruch 2, dadurch gekennzeichnet, dass die Wendeln der mit den einzelnen Wendeldurchmessern (wdl, wd2, wd3, wdn) gegenläufig gewickelt sind. 4. glow plug according to claim 2, characterized in that the coils of the individual coil diameters (wdl, wd2, wd3, wdn) are wound in opposite directions.
EP03808242A 2002-10-19 2003-06-26 Multispiral for a glow plug Expired - Lifetime EP1567806B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10248804A DE10248804A1 (en) 2002-10-19 2002-10-19 Multiple filament for glow plugs
DE10248804 2002-10-19
PCT/DE2003/002131 WO2004040196A1 (en) 2002-10-19 2003-06-26 Multispiral for a pre-heating pencil spark plug

Publications (2)

Publication Number Publication Date
EP1567806A1 true EP1567806A1 (en) 2005-08-31
EP1567806B1 EP1567806B1 (en) 2009-08-12

Family

ID=32049449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03808242A Expired - Lifetime EP1567806B1 (en) 2002-10-19 2003-06-26 Multispiral for a glow plug

Country Status (9)

Country Link
US (1) US7161119B2 (en)
EP (1) EP1567806B1 (en)
JP (1) JP4340237B2 (en)
KR (1) KR20050050132A (en)
AT (1) ATE439555T1 (en)
BR (1) BR0306595A (en)
DE (2) DE10248804A1 (en)
PL (1) PL374742A1 (en)
WO (1) WO2004040196A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1751416A (en) * 1926-03-04 1930-03-18 Gen Electric Electric heating unit
DE3318459A1 (en) * 1983-05-20 1984-11-22 Robert Bosch Gmbh, 7000 Stuttgart DEVICE FOR INJECTING FUEL INTO COMBUSTION
DE3631473A1 (en) * 1986-09-16 1988-03-24 Pischinger Franz Prof Dipl Ing IGNITION DEVICE FOR AN AIR COMPRESSING INTERNAL COMBUSTION ENGINE
DE3911492A1 (en) * 1989-04-08 1990-10-11 Bosch Gmbh Robert GLOW PLUG CANDLE
DE4301252A1 (en) * 1993-01-19 1994-07-21 Beru Werk Ruprecht Gmbh Co A Pole flame glow plug
US6064039A (en) * 1998-04-15 2000-05-16 Ngk Spark Plug Co., Ltd. Glow plug with small-diameter sheath tube enclosing heating and control coils

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004040196A1 *

Also Published As

Publication number Publication date
WO2004040196A1 (en) 2004-05-13
JP4340237B2 (en) 2009-10-07
US20060006162A1 (en) 2006-01-12
PL374742A1 (en) 2005-10-31
US7161119B2 (en) 2007-01-09
ATE439555T1 (en) 2009-08-15
BR0306595A (en) 2004-11-30
JP2006503257A (en) 2006-01-26
DE50311816D1 (en) 2009-09-24
DE10248804A1 (en) 2004-04-29
KR20050050132A (en) 2005-05-27
EP1567806B1 (en) 2009-08-12

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