EP0560966A1 - Glow plug - Google Patents
Glow plugInfo
- 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
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.Glow plug with an incandescent tube in the tip of which is mounted a heating element with which a regulating element, also mounted in the tube, is connected in series. The inner pole of the glow plug is connected to the regulating element, and the heat transfer between the regulating element (2) and the inner pole (4) is minimized.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4133338 | 1991-10-08 | ||
DE4133338A DE4133338A1 (en) | 1991-10-08 | 1991-10-08 | GLOW PLUG |
PCT/EP1992/002318 WO1993007423A1 (en) | 1991-10-08 | 1992-10-08 | Glow plug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0560966A1 true EP0560966A1 (en) | 1993-09-22 |
EP0560966B1 EP0560966B1 (en) | 1998-07-08 |
Family
ID=6442278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92921112A Expired - Lifetime EP0560966B1 (en) | 1991-10-08 | 1992-10-08 | Glow plug |
Country Status (6)
Country | Link |
---|---|
US (1) | US5521356A (en) |
EP (1) | EP0560966B1 (en) |
JP (1) | JP3243253B2 (en) |
DE (2) | DE4133338A1 (en) |
ES (1) | ES2118830T3 (en) |
WO (1) | WO1993007423A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4334771C2 (en) * | 1993-10-12 | 1996-03-28 | Beru Werk Ruprecht Gmbh Co A | Glow plug |
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 (en) * | 1996-07-26 | 2000-12-28 | Beru Ag | Pole flame glow plug |
DE19755822A1 (en) * | 1997-12-16 | 1999-06-24 | Bosch Gmbh Robert | Glow plug |
DE19833862A1 (en) * | 1998-07-28 | 2000-02-03 | Bosch Gmbh Robert | Heating element used for long plate type or lambda probes for measuring oxygen concentration in the exhaust gas of combustion engines |
DE10041289B4 (en) * | 2000-08-22 | 2005-05-04 | Beru Ag | glow plug |
DE10117641C2 (en) * | 2001-04-09 | 2003-02-27 | Beru Ag | glow plug |
JP2002367760A (en) * | 2001-06-11 | 2002-12-20 | Ngk Spark Plug Co Ltd | Heater and glow plug |
DE10248802A1 (en) * | 2002-10-19 | 2004-04-29 | Robert Bosch Gmbh | Glow plug with greatly shortened control coil |
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 (en) * | 2004-10-29 | 2010-07-28 | 日本特殊陶業株式会社 | Glow plug |
GB0428297D0 (en) * | 2004-12-24 | 2005-01-26 | Heat Trace Ltd | Control of heating cable |
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 |
US8022337B2 (en) * | 2008-06-10 | 2011-09-20 | Locust, Usa, Inc. | Ignitor plug assembly |
WO2013157223A1 (en) * | 2012-04-16 | 2013-10-24 | 日本特殊陶業株式会社 | Glow plug |
JP6279925B2 (en) * | 2014-02-14 | 2018-02-14 | 日本特殊陶業株式会社 | Glow plug |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2802625C3 (en) * | 1978-01-21 | 1985-07-18 | BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg | Glow plug |
IT1175444B (en) * | 1984-03-09 | 1987-07-01 | Magneti Marelli Spa | SPARK PLUG FOR DIESEL ENGINES FOR VEHICLES |
DE3502525C2 (en) * | 1985-01-25 | 1993-11-11 | Beru Werk Ruprecht Gmbh Co A | Glow element |
JPS6217520A (en) * | 1985-07-15 | 1987-01-26 | Ngk Spark Plug Co Ltd | Self-control type glow plug |
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 |
JP2745225B2 (en) * | 1989-02-15 | 1998-04-28 | 自動車機器株式会社 | Glow plug for diesel engine |
DE3911831A1 (en) * | 1989-04-11 | 1990-10-18 | Bosch Gmbh Robert | Glow-plug for Diesel engine - has heating coil threaded into hollow end of contact shaft and embedded in insulating powder |
JPH03175210A (en) * | 1989-09-11 | 1991-07-30 | Jidosha Kiki Co Ltd | Glow plug of ceramic heater type |
JPH0814376B2 (en) * | 1989-09-11 | 1996-02-14 | 自動車機器株式会社 | Self temperature control glow plug |
DE4014356A1 (en) * | 1990-05-04 | 1991-11-07 | Beru Werk Ruprecht Gmbh Co A | GLOW PLUG |
JPH04143518A (en) * | 1990-10-04 | 1992-05-18 | Ngk Spark Plug Co Ltd | Self-regulative type ceramic glow plug |
DE9112507U1 (en) * | 1991-10-08 | 1992-03-26 | BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg | Glow plug |
-
1991
- 1991-10-08 DE DE4133338A patent/DE4133338A1/en not_active Withdrawn
-
1992
- 1992-10-08 WO PCT/EP1992/002318 patent/WO1993007423A1/en active IP Right Grant
- 1992-10-08 DE DE59209406T patent/DE59209406D1/en not_active Expired - Lifetime
- 1992-10-08 EP EP92921112A patent/EP0560966B1/en not_active Expired - Lifetime
- 1992-10-08 JP JP50662793A patent/JP3243253B2/en not_active Expired - Lifetime
- 1992-10-08 US US08/070,380 patent/US5521356A/en not_active Expired - Lifetime
- 1992-10-08 ES ES92921112T patent/ES2118830T3/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9307423A1 * |
Also Published As
Publication number | Publication date |
---|---|
JPH06503411A (en) | 1994-04-14 |
JP3243253B2 (en) | 2002-01-07 |
US5521356A (en) | 1996-05-28 |
WO1993007423A1 (en) | 1993-04-15 |
ES2118830T3 (en) | 1998-10-01 |
DE4133338A1 (en) | 1993-04-15 |
DE59209406D1 (en) | 1998-08-13 |
EP0560966B1 (en) | 1998-07-08 |
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