EP1240462A2 - Glühstiftkerze - Google Patents
GlühstiftkerzeInfo
- Publication number
- EP1240462A2 EP1240462A2 EP00987092A EP00987092A EP1240462A2 EP 1240462 A2 EP1240462 A2 EP 1240462A2 EP 00987092 A EP00987092 A EP 00987092A EP 00987092 A EP00987092 A EP 00987092A EP 1240462 A2 EP1240462 A2 EP 1240462A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- glow plug
- temperature sensor
- receptacle
- glow
- plug according
- 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
- 239000000919 ceramic Substances 0.000 claims abstract description 13
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000000446 fuel Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 11
- 239000004020 conductor Substances 0.000 description 7
- 229910010293 ceramic material Inorganic materials 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000006735 deficit Effects 0.000 description 2
- 239000002241 glass-ceramic Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- UPIXZLGONUBZLK-UHFFFAOYSA-N platinum Chemical compound [Pt].[Pt] UPIXZLGONUBZLK-UHFFFAOYSA-N 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
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
-
- 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, in particular for starting a self-igniting internal combustion engine, with the features mentioned in the preamble of claim 1.
- Glow plugs of the generic type are known. To start a self-igniting internal combustion engine, an initial ignition of a fuel-air mixture is required. Glow plugs are used for this purpose, which are arranged in a wall of a combustion chamber. The glow plugs include a glow plug which can be brought into contact with the fuel-air mixture to be ignited.
- the glow plug It is known to manufacture the glow plug from an electrically conductive ceramic.
- the glow plug has a defined electrical resistance, so that when the glow plug is connected to a voltage source, a heating current flows which leads to the heating of the glow plug to a defined temperature. This temperature is sufficient to ignite the fuel-air mixture.
- the self-igniting internal combustion engine it is desirable to have knowledge of a glow plug temperature.
- the electrically conductive ceramics from which the glow plugs are made consist of a material with a positive temperature coefficient. This means that the resistance increases with increasing temperature, so that the heating current decreases with a constant supply voltage. From this, the instantaneous temperature of the glow plug can be inferred from the course of the heating current over time.
- the temperature distribution can vary greatly over the length of the glow plug with the same heating current. The temperature distribution is dependent, for example, on a speed, a load state and / or cooling of the internal combustion engine. Experimental studies have shown that temperature differences of up to 200 ° C can occur.
- the glow plug according to the invention with the features mentioned in claim 1 offers the advantage that an immediate temperature measurement can be carried out on a glow plug tip of the glow plug without the actual glow function of the glow plug is impaired. Because the glow plug has an integrated temperature sensor, a current temperature of the glow plug can be determined both when the glow plug is in active operation and when the glow plug is arranged passively. In particular, an accuracy of the temperature determination is independent of an operating state of the self-igniting internal combustion engine.
- the temperature sensor is integrated directly into the glow plug, the glow plug in particular having an essentially axially extending bore for receiving the temperature sensor. This ensures that the temperature sensor can be integrated into the glow plug in a particularly simple manner. An additional installation space for the temperature sensor is not required, since it is integrated into the glow plug virtually on the inside.
- the bore receiving the temperature sensor is arranged within an insulating core of the glow plug.
- the temperature sensor is arranged without any impairment of the actual glow function of the glow pencil.
- the temperature sensor Bore of the glow plug is an edge-open groove of the glow plug, at least in some areas. This advantageously makes it possible to guide the temperature sensor up to an outer circumferential wall of the glow plug, so that a particularly exact temperature measurement is possible, since the arrangement in the open-edged recess means that it is not necessary to take into account a thermal contact resistance of the ceramic material of the glow plug.
- Figure 1 is a sectional view through a glow plug in a first embodiment
- FIG. 2 shows a schematic view of a temperature sensor
- Figure 3 is a schematic sectional view through a glow plug
- Figure 4 is a sectional view through a glow plug in a second embodiment; Figures are schematic views of a glow plug 5 and 6 according to the second embodiment and
- FIG. 7 Figures schematic views of a glow plug 7 and 8 in a further embodiment.
- FIG. 1 shows a glow plug 10, which can be used to start a self-igniting internal combustion engine.
- the glow plug 10 comprises a candle housing 12 which is essentially hollow-cylindrical.
- the candle housing 12 receives a glow plug 14.
- the candle housing 12 can be sealingly arranged in a wall of a cylinder housing, not shown, so that the glow plug 14 projects into the combustion chamber.
- Glow plug 14 is electrically conductively connected to a contact pin 18 via a contact spring 16.
- the contact pin 18 can be connected in a manner not shown to a voltage source in the motor vehicle of the motor vehicle battery, so that a voltage can be applied to the glow plug 14 via the contact pin 18 and a contact element, for example a contact spring 16.
- the glow plug 14 itself consists of a ceramic, electrically conductive material.
- the glow plug 10 comprises further components, of which seals 20 and 22, a ceramic sleeve 24, a metal ring 26 and a tensioning element 28 are also designated here.
- the glow plug 10 also includes an integrated temperature sensor 30, which is essentially over the entire length of the glow plug 10 extends along a longitudinal axis 32.
- the voltage U is applied to the glow plug 14, so that a heating current I flows.
- the level of the heating current I depends on the electrical resistance R of the glow plug 14. This is designed so that it acts as a heating element (glow element). It can be provided here that the distribution of the electrical resistance R is different over the length of the glow plug 14. In particular, a higher electrical resistance R is concentrated in the region of a glow pencil tip 34, so that a higher voltage U drops there and the heating within the glow pencil tip 34 is greater than in the remaining region of the glow pencil 14.
- the temperature sensor 30 is schematically shown individually in FIG. 2.
- the temperature sensor 30 consists, for example, of a combination of two electrically conductive materials that one of the acting temperature generates proportional voltage.
- a platinum-platinum / rhodium thermocouple known per se is used as the temperature sensor 30.
- This electrical conductor 36 is guided as a conductor loop within the temperature sensor 30 and can be connected to an evaluation circuit via external connections 38.
- the temperature sensor 30 consists of an electrically non-conductive, temperature-resistant ceramic and comprises a double capillary (not shown in detail) for receiving the conductor loops.
- the temperature sensor 30 is guided in an insulating manner by the connecting bolt 18.
- the connecting pin 18 has a bore 40 extending in the longitudinal direction of the glow plug. Since the temperature sensor 30 is made of electrically insulating ceramic over its outer circumference, a short circuit with the connecting pin 24 is excluded.
- the temperature sensor 30 is guided directly into the glow plug tip 34.
- the glow plug 14 itself usually consists of the electrically conductive ceramic, which surrounds an insulating core 42. This leads to the formation of the U-shaped conductor loop from the electrically conductive ceramic material of the glow plug 1.
- the temperature sensor 30 is now arranged within the insulating core 30 or, because of its external electrically insulating properties, forms the insulating core 42 itself.
- a distance of the temperature sensor 30 from the electrically conductive area of the glow plug 14 is, for example, 0.2 mm.
- Figure 3 shows the glow plug 14 in an individual representation. It is clear here that the glow plug 14 has a receptacle 44 running on the longitudinal axis 30, into which the temperature sensor 30 can be inserted. The receptacle 44 extends directly into the glow pencil tip 34. The receptacle 44 is formed, for example, by a blind bore 45.
- the receptacle 44 is preferably introduced in the green state of the ceramic. This avoids material flaking or the like during the insertion of the receptacle 44.
- FIG. 4 shows a glow plug 10 in a further embodiment variant, the same parts as in FIG. 1 being provided with the same reference symbols and not being explained again. In this respect, only the existing differences are dealt with. Other structure and function are identical.
- FIG. 4 shows a top view of the glow plug 14 - seen from the right according to FIG. 4 - and FIG. 6 shows a sectional view rotated by 90 ° to FIG.
- the receptacle 44 for receiving the temperature sensor 30 is initially formed by a bore 47 which, starting in the region of the longitudinal axis 32, initially runs at an angle ⁇ to the longitudinal axis 32.
- the angle is selected so that, based on the total length 1 of heating pin 14, the bore 47 at about 2 o f the envelope surface 46 and opens merges into an open-edged recess 48th
- a depth of the edge-open recess 48 is adapted to a diameter of the temperature sensor 30 so that it does not protrude radially beyond the lateral surface 46 of the glow plug 14.
- FIGS. 7 and 8 show a further embodiment variant, in which the receptacle 44 is formed by a radial slot 50 which initially has a decreasing depth over the length 1 of the glow plug 14 up to the length 1/2 and then into the one already shown in FIG 6 shown open edge recess 48 merges.
- the slot 50 it is possible to insert the temperature sensor 30 radially into the glow plug 14, whereas, according to the exemplary embodiment in FIGS. 5 and 6, it first has to be threaded into the bore 47 in order then to be able to be inserted into the recess 48 which is open at the edge ,
- the glow plug 14 is known to consist of a layer structure, an insulating ceramic being embedded in the U-shaped conductor loop made of electrically conductive ceramic. Impairment of the electrically conductive ceramic, for example the cross section of the electrically conductive layer, is thus avoided.
- the temperature sensor 30 can be fastened in the bore 47 or the groove 50 and the edge-open recess 48 by glazing using a glass ceramic. The thermal expansion behavior of this glass ceramic, the ceramic material of the temperature sensor 30 and the insulating ceramic material of the glow plug 14 is matched to one another, so that when the entire layer composite is heated, the thermal expansion behavior is essentially the same.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19959766A DE19959766A1 (de) | 1999-12-11 | 1999-12-11 | Glühstiftkerze |
DE19959766 | 1999-12-11 | ||
PCT/DE2000/003898 WO2001042715A2 (de) | 1999-12-11 | 2000-11-08 | Glühstiftkerze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1240462A2 true EP1240462A2 (de) | 2002-09-18 |
EP1240462B1 EP1240462B1 (de) | 2004-12-01 |
Family
ID=7932267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00987092A Expired - Lifetime EP1240462B1 (de) | 1999-12-11 | 2000-11-08 | Glühstiftkerze |
Country Status (13)
Country | Link |
---|---|
US (1) | US6812432B1 (de) |
EP (1) | EP1240462B1 (de) |
JP (1) | JP2003527553A (de) |
KR (1) | KR100671185B1 (de) |
AT (1) | ATE284008T1 (de) |
CZ (1) | CZ20021965A3 (de) |
DE (2) | DE19959766A1 (de) |
ES (1) | ES2232517T3 (de) |
HU (1) | HU224475B1 (de) |
PL (1) | PL195122B1 (de) |
SK (1) | SK8242002A3 (de) |
TW (1) | TW575723B (de) |
WO (1) | WO2001042715A2 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004002485A1 (de) * | 2004-01-17 | 2005-08-11 | Robert Bosch Gmbh | Glühstiftkerze mit integrierter Temperaturerfassung |
DE102005050435B4 (de) * | 2005-10-19 | 2011-04-14 | Man Diesel & Turbo Se | Gasmotor und Zündeinrichtung für einen Gasmotor |
DE102006052634A1 (de) * | 2006-11-08 | 2008-05-15 | Robert Bosch Gmbh | Kraftstoffheizer |
US20080216828A1 (en) | 2007-03-09 | 2008-09-11 | Alexza Pharmaceuticals, Inc. | Heating unit for use in a drug delivery device |
KR101444950B1 (ko) * | 2008-06-12 | 2014-09-26 | 현대자동차주식회사 | 실린더 헤드 구조 |
US20100065052A1 (en) * | 2008-09-16 | 2010-03-18 | Alexza Pharmaceuticals, Inc. | Heating Units |
DE102009028952A1 (de) * | 2009-08-27 | 2011-03-03 | Robert Bosch Gmbh | Glühkerze mit integriertem Temperaturfühler |
US20120048963A1 (en) | 2010-08-26 | 2012-03-01 | Alexza Pharmaceuticals, Inc. | Heat Units Using a Solid Fuel Capable of Undergoing an Exothermic Metal Oxidation-Reduction Reaction Propagated without an Igniter |
JP5660612B2 (ja) * | 2011-01-12 | 2015-01-28 | ボッシュ株式会社 | グロープラグ先端温度推定方法及びグロープラグ駆動制御装置 |
MX2017011613A (es) | 2015-03-11 | 2018-04-10 | Alexza Pharmaceuticals Inc | Utilización de materiales antiestáticos en los conductos de aire para el proceso de aerosol de condensación térmica. |
ITUB20152625A1 (it) * | 2015-07-30 | 2017-01-30 | Irca Spa | Resistenza corazzata e relativo processo di produzione |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3890485A (en) * | 1974-03-29 | 1975-06-17 | Emerson Electric Co | Electric heaters |
US4437440A (en) * | 1979-06-20 | 1984-03-20 | Ngk Spark Plug Co., Ltd. | Auxiliary combustion chamber preheating device |
JPS5968569A (ja) * | 1982-10-14 | 1984-04-18 | Nissan Motor Co Ltd | デイ−ゼルエンジンの予熱制御装置 |
DE9112242U1 (de) | 1991-10-01 | 1991-11-28 | BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg | Temperaturmeßglühkerze |
DE9112300U1 (de) | 1991-10-02 | 1991-11-28 | BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg | Glühkerze mit Sensorelement |
JP3306427B2 (ja) * | 1997-11-21 | 2002-07-24 | いすゞ自動車株式会社 | シース構造体 |
JP2001336468A (ja) * | 2000-03-22 | 2001-12-07 | Ngk Spark Plug Co Ltd | グロープラグ制御装置、グロープラグ、及びエンジンの燃焼室内のイオン検出方法 |
US6486442B2 (en) * | 2000-10-12 | 2002-11-26 | Hotset Corporation | Heating device with electric heating element and thermocouple |
-
1999
- 1999-12-11 DE DE19959766A patent/DE19959766A1/de not_active Withdrawn
-
2000
- 2000-11-08 PL PL00355568A patent/PL195122B1/pl not_active IP Right Cessation
- 2000-11-08 SK SK824-2002A patent/SK8242002A3/sk unknown
- 2000-11-08 DE DE50008870T patent/DE50008870D1/de not_active Expired - Lifetime
- 2000-11-08 CZ CZ20021965A patent/CZ20021965A3/cs unknown
- 2000-11-08 KR KR1020027007437A patent/KR100671185B1/ko not_active IP Right Cessation
- 2000-11-08 US US10/149,483 patent/US6812432B1/en not_active Expired - Fee Related
- 2000-11-08 ES ES00987092T patent/ES2232517T3/es not_active Expired - Lifetime
- 2000-11-08 JP JP2001543961A patent/JP2003527553A/ja not_active Withdrawn
- 2000-11-08 WO PCT/DE2000/003898 patent/WO2001042715A2/de active IP Right Grant
- 2000-11-08 HU HU0203467A patent/HU224475B1/hu not_active IP Right Cessation
- 2000-11-08 EP EP00987092A patent/EP1240462B1/de not_active Expired - Lifetime
- 2000-11-08 AT AT00987092T patent/ATE284008T1/de not_active IP Right Cessation
- 2000-11-14 TW TW89124036A patent/TW575723B/zh active
Non-Patent Citations (1)
Title |
---|
See references of WO0142715A2 * |
Also Published As
Publication number | Publication date |
---|---|
ES2232517T3 (es) | 2005-06-01 |
HUP0203467A2 (en) | 2003-02-28 |
TW575723B (en) | 2004-02-11 |
WO2001042715A3 (de) | 2001-10-25 |
HU224475B1 (hu) | 2005-09-28 |
DE50008870D1 (de) | 2005-01-05 |
US6812432B1 (en) | 2004-11-02 |
DE19959766A1 (de) | 2001-06-13 |
KR100671185B1 (ko) | 2007-01-19 |
JP2003527553A (ja) | 2003-09-16 |
EP1240462B1 (de) | 2004-12-01 |
PL355568A1 (en) | 2004-05-04 |
WO2001042715A2 (de) | 2001-06-14 |
ATE284008T1 (de) | 2004-12-15 |
CZ20021965A3 (cs) | 2003-02-12 |
PL195122B1 (pl) | 2007-08-31 |
SK8242002A3 (en) | 2003-03-04 |
KR20020062964A (ko) | 2002-07-31 |
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