EP0560966A1 - Bougie de prechauffage - Google Patents

Bougie de prechauffage

Info

Publication number
EP0560966A1
EP0560966A1 EP92921112A EP92921112A EP0560966A1 EP 0560966 A1 EP0560966 A1 EP 0560966A1 EP 92921112 A EP92921112 A EP 92921112A EP 92921112 A EP92921112 A EP 92921112A EP 0560966 A1 EP0560966 A1 EP 0560966A1
Authority
EP
European Patent Office
Prior art keywords
glow plug
control coil
plug according
control
area
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
EP92921112A
Other languages
German (de)
English (en)
Other versions
EP0560966B1 (fr
Inventor
Paul Bauer
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.)
BorgWarner Ludwigsburg GmbH
Original Assignee
BERU RUPRECHT GmbH and Co KG
BERU Ruprecht GmbH and Co KG
Beru Werk Albert Ruprecht GmbH and Co KG
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 BERU RUPRECHT GmbH and Co KG, BERU Ruprecht GmbH and Co KG, Beru Werk Albert Ruprecht GmbH and Co KG filed Critical BERU RUPRECHT GmbH and Co KG
Publication of EP0560966A1 publication Critical patent/EP0560966A1/fr
Application granted granted Critical
Publication of EP0560966B1 publication Critical patent/EP0560966B1/fr
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

Definitions

  • the invention relates to a glow plug according to the preamble of claim 1.
  • Such a glow plug is described for example in DE-PS 28 02 625.
  • This glow plug has a glow tube, in which a heating coil is arranged in the tip area and a control coil in an electrically insulating material in the connection-side area.
  • the glow plugs of this type known from the prior art have the disadvantage that they become more environmentally friendly during continuous glow or longer glow in the running engine Exhaust gases lead to low stability to meet the usual requirements for the stability of glow plugs.
  • the object of the invention is to provide a glow plug which bypasses the disadvantages shown in the prior art and which has high stability even after prolonged afterglowing; at the same time, the preheat temperature that can be achieved so far. time are practically observed, and mass production can take place in the usual way and economically as before.
  • This object is achieved by the glow plug according to claim 1. Further advantageous embodiments of the invention result from the following claims 2 to 13.
  • FIG. 1 is a cross section through a heating element of a glow plug according to the invention
  • FIG. 2 is the schematic cross section through an embodiment of the glow plug according to the invention.
  • the tube 7 in which the heating coil 1, the control coil 2, the inner pole 4 and the sealing ring (0-ring) are arranged in electrically insulating material (e.g. MgO).
  • electrically insulating material e.g. MgO.
  • the diameter of the turns of the area 3 is preferably smaller than half the diameter of the turns of the actual control area 2 of the control coil.
  • the wire length of area 3 corresponds to about 1/10 to about 1/20 of the total wire length of the variable resistor at room temperature.
  • the length of this part is preferably greater than approximately 2.5 to 4 mm, particularly preferably it has at least four turns.
  • the winding diameter in area 3 should correspond to the lower limit of approximately four times the standard wire gauge.
  • This part 3 is equal to or greater than twice the wire thickness.
  • the illustration shows the control spiral area 2 (with a larger diameter) in one piece. In fact, however, it can also be formed in two or more pieces, the sub-areas each consisting of different alloys with different temperature-resistance coefficients.
  • the solution according to the invention is particularly advantageous to be used in which, for example, the resistance ratio of the resistance at 20 ° C / 1,000 0 C is greater than about 7.5 (at> 12 in the case where the control coils with high temperature-resistance coefficient it becomes extremely critical), in particular this also applies to control coils made of materials which do not have a continuous but a sudden increase in resistance, as is described, for example, in applications DE-OS 38 25 013 and 39 23 582. Under these circumstances the glow plugs according to the invention are particularly suitable for continuous glow or long glow in the running engine.
  • the embodiment according to FIG. 1 has a conventional inner pole 4.
  • This inner pole 4 is particularly preferably made of a material that conducts electricity and has poor thermal conductivity.
  • An example is a steel with a higher Cr-Ni content, which, like others, is easily accessible to the average person skilled in the alloy field. Since it is also protected against rust by its composition, the cable connection (M5, M4 thread) does not need to be provided with rust protection, as is often required.
  • the inner pole accordingly consists of a material that conducts electricity and that conducts heat poorly.
  • the intermediate area 3 can be dispensed with (or, together with the intermediate area 3, heat dissipation can be reduced still further).
  • FIG. 2 shows a glow plug design according to the invention, in which the glow plug pin according to FIG. 1 is installed.
  • the transition region 3 and the inner pole 4 are by themselves known "plug connection" 8 connected to each other with additional caulking.
  • control coil (s) 2 can heat up practically over their entire length to the same temperature, and that neither the axially refluxing heat from the area of the heating coil 7 nor that radially from / Regulating spiral (s) of heat spreading to the glow tube are drawn off nonuniformly and the heat dissipation to the inner pole is sufficiently impeded.
  • the transition area 3 is made in one piece and is made of the same material as the adjacent control coil area 2.
  • this area 3 can also consist of a different material than that of the adjoining area of the control coil 2, the material this area 3 should then have current conductivity, but should have low thermal conductivity; such material and alloys are known per se and can also be, for example, the materials that have been described above with regard to the inner pole if it has low thermal conductivity.
  • the glow tube diameter is approximately 6 mm; the diameter of the control coil 2 is approximately 3.8 mm and the diameter of the transition region 3 is approximately 1.8 mm with a control wire thickness of approximately 0.35 mm.
  • the total length of the control wire is 200 to 220 mm, the length of the control wire in area 3 being about 12 mm.
  • the solution according to the invention leads to the surprising result that the maximum temperature of the glow pencil tip or the heating coil itself, at which the de-icing begins, is reduced, so that on the one hand the preheating time is practically not reduced, but the service life is significantly increased under afterglow conditions.
  • Heating coil control coil transition part inner pole O-ring insulating material glow tube plug connection (connection inner pole control coil)

Landscapes

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

Abstract

Bougie de préchauffage avec un tube à incandescence dans la pointe duquel est monté un élément chauffant avec lequel un élément de régulation, également monté dans le tube, est relié en série. Le pôle intérieur de la bougie de préchauffage est relié à l'élément de régulation, et le transfert de chaleur entre l'élément de régulation (2) et le pôle intérieur (4) est minimisé.
EP92921112A 1991-10-08 1992-10-08 Bougie de prechauffage Expired - Lifetime EP0560966B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4133338 1991-10-08
DE4133338A DE4133338A1 (de) 1991-10-08 1991-10-08 Gluehkerze
PCT/EP1992/002318 WO1993007423A1 (fr) 1991-10-08 1992-10-08 Bougie de prechauffage

Publications (2)

Publication Number Publication Date
EP0560966A1 true EP0560966A1 (fr) 1993-09-22
EP0560966B1 EP0560966B1 (fr) 1998-07-08

Family

ID=6442278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92921112A Expired - Lifetime EP0560966B1 (fr) 1991-10-08 1992-10-08 Bougie de prechauffage

Country Status (6)

Country Link
US (1) US5521356A (fr)
EP (1) EP0560966B1 (fr)
JP (1) JP3243253B2 (fr)
DE (2) DE4133338A1 (fr)
ES (1) ES2118830T3 (fr)
WO (1) WO1993007423A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4334771C2 (de) * 1993-10-12 1996-03-28 Beru Werk Ruprecht Gmbh Co A Glühkerze
US6037568A (en) * 1996-01-18 2000-03-14 Jidosha Kiki Co., Ltd. Glow plug for diesel engine with ptc control element disposed in small-diameter sheath section and connected to the distal end thereof
DE19630402C2 (de) * 1996-07-26 2000-12-28 Beru Ag Stabflammglühkerze
DE19755822A1 (de) * 1997-12-16 1999-06-24 Bosch Gmbh Robert Glühstiftkerze
DE19833862A1 (de) * 1998-07-28 2000-02-03 Bosch Gmbh Robert Heizelement für Lambda-Sonden
DE10041289B4 (de) * 2000-08-22 2005-05-04 Beru Ag Glühkerze
DE10117641C2 (de) * 2001-04-09 2003-02-27 Beru Ag Stabglühkerze
JP2002367760A (ja) * 2001-06-11 2002-12-20 Ngk Spark Plug Co Ltd ヒータ及びグロープラグ
DE10248802A1 (de) * 2002-10-19 2004-04-29 Robert Bosch Gmbh Glühstiftkerze mit stark verkürzter Regelwendel
US6878903B2 (en) * 2003-04-16 2005-04-12 Fleming Circle Associates, Llc Glow plug
US7332690B2 (en) * 2003-09-05 2008-02-19 Channel Products, Inc. Hot wire igniter
JP4510588B2 (ja) * 2004-10-29 2010-07-28 日本特殊陶業株式会社 グロープラグ
GB0428297D0 (en) * 2004-12-24 2005-01-26 Heat Trace Ltd Control of heating cable
DE102008015402B3 (de) * 2008-03-22 2009-10-22 Beru Ag Glühkerze
US8022337B2 (en) * 2008-06-10 2011-09-20 Locust, Usa, Inc. Ignitor plug assembly
KR101638722B1 (ko) * 2012-04-16 2016-07-11 니혼도꾸슈도교 가부시키가이샤 글로 플러그
JP6279925B2 (ja) * 2014-02-14 2018-02-14 日本特殊陶業株式会社 グロープラグ

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2802625C3 (de) * 1978-01-21 1985-07-18 BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg Glühkerze
IT1175444B (it) * 1984-03-09 1987-07-01 Magneti Marelli Spa Candela ad incandescenza per motori diesel per autoveicoli
DE3502525C2 (de) * 1985-01-25 1993-11-11 Beru Werk Ruprecht Gmbh Co A Glühelement
JPS6217520A (ja) * 1985-07-15 1987-01-26 Ngk Spark Plug Co Ltd 自己制御型グロ−プラグ
GB2220446B (en) * 1988-04-06 1992-05-27 Champion Spark Plug Europ Glow plug for internal combustion engine
DE3825013A1 (de) * 1988-07-22 1990-01-25 Beru Werk Ruprecht Gmbh Co A Gluehkerze
JP2745225B2 (ja) * 1989-02-15 1998-04-28 自動車機器株式会社 デイーゼルエンジン用グロープラグ
DE3911831A1 (de) * 1989-04-11 1990-10-18 Bosch Gmbh Robert Starthilfevorrichtung fuer dieselmotoren, insbesondere gluehstiftkerze oder flammkerze
JPH0814376B2 (ja) * 1989-09-11 1996-02-14 自動車機器株式会社 自己温度制御型グロープラグ
JPH03175210A (ja) * 1989-09-11 1991-07-30 Jidosha Kiki Co Ltd セラミツクヒータ型グロープラグ
DE4014356A1 (de) * 1990-05-04 1991-11-07 Beru Werk Ruprecht Gmbh Co A Gluehkerze
JPH04143518A (ja) * 1990-10-04 1992-05-18 Ngk Spark Plug Co Ltd 自己制御型セラミックグロープラグ
DE9112507U1 (de) * 1991-10-08 1992-03-26 BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg Glühkerze

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9307423A1 *

Also Published As

Publication number Publication date
DE59209406D1 (de) 1998-08-13
ES2118830T3 (es) 1998-10-01
WO1993007423A1 (fr) 1993-04-15
EP0560966B1 (fr) 1998-07-08
DE4133338A1 (de) 1993-04-15
JP3243253B2 (ja) 2002-01-07
JPH06503411A (ja) 1994-04-14
US5521356A (en) 1996-05-28

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