EP2135008A1 - Seal for a glow plug - Google Patents
Seal for a glow plugInfo
- Publication number
- EP2135008A1 EP2135008A1 EP08717467A EP08717467A EP2135008A1 EP 2135008 A1 EP2135008 A1 EP 2135008A1 EP 08717467 A EP08717467 A EP 08717467A EP 08717467 A EP08717467 A EP 08717467A EP 2135008 A1 EP2135008 A1 EP 2135008A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing element
- support tube
- glow plug
- sleeve
- ceramic heater
- 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 is based on a glow plug according to the preamble of claim 1.
- a glow plug with combustion chamber pressure sensor in which a trained as a glow plug ceramic heater is disposed in a housing.
- the ceramic heater is surrounded by a support tube which is fixed by means of a seal in the housing.
- the seal is formed by a arranged between the support tube and housing graphite ring.
- the invention has for its object to provide a glow plug with a ceramic heater, in which the interior is reliably sealed against the combustion chamber gases.
- the glow plug is provided with a sealing element between the ceramic heating element and the metallic support tube, wherein the sealing element consists of a metallic alloy with a so-called Invar effect, such alloys having a particularly low value in terms of the thermal expansion coefficient (CTE).
- An invar effect is a phenomenon in which a group of alloys and compounds in certain Temperature regions abnormally small or partially negative coefficients of thermal expansion.
- the metallic support tube used has the task of securing the ceramic heater.
- the ceramic heater is incorporated in the support tube, for example by means of a soldering process, cohesively.
- Another function of the support tube is to present a hermetic, long-term sealing of a sensor module against the influences of aggressive combustion media, in particular against the high combustion pressures, against sooting and against accumulating soot particles and against corrosion.
- a FeNi alloy As an alloy with an Invar effect, a FeNi alloy is used.
- the failure of the sealing function i. the local or complete loss of the mechanical contact at the interface between the metallic material of the support tube and the ceramic material of the radiator avoided by an additional sealing element pressed directly on a combustion chamber side end face of the support tube on the ceramic heater and then by means of a non-positive or a cohesive joint connection is attached to the support tube.
- the sealing element is formed in a ring shape.
- a Hertzian pressure on the contact line between the sealing element and the radiator can be realized, which leads to a particularly good seal against the aggressive media, in particular the combustion pressures in the combustion chamber.
- the proposed sealing element be it in the form of a one-piece or multi-part sleeve, be it in ring form formed as a one-piece component, made of a material having a coefficient of thermal expansion (WAK), which in the candidate here operating temperature range under the CTE value of the ceramic heater is, itself approaches or insignificantly exceeds this.
- WAK coefficient of thermal expansion
- Particularly suitable as a material for the sealing element to call a metal alloy with Invar effect, which is known under the trade name KOVAR ® .
- This metal alloy has a nickel content of 29.0 wt%, a cobalt content of 17.0 wt%, a silicon content of 0.1 wt% to 0.2 wt%, a manganese content of 0.3 Wt .-% and a maximum carbon content of 0.02 wt .-%, balance iron.
- the sleeve-shaped sealing element produced in an embodiment in a ring shape, wherein the sleeve-shaped sealing element is attached to the support tube.
- the joint between the sleeve-shaped sealing element and the support tube may be formed with tapered surfaces or step-shaped.
- the axial positioning of the sealing element is particularly advantageous because no further modifications of the ceramic heater are required in this case.
- Sealing connection between the support tube and the sealing element can be produced, for example, by means of a corresponding cohesive joining method, such as, for example, the welding method or the soldering method.
- the complete support tube can be made entirely from an alloy with Invar effect.
- the sealing element is not limited in terms of its application only to glow plugs, but can also be used on other cylinder head components of internal combustion engines, such as glow plugs with integrated pressure sensors or the like.
- FIG. 1 shows a glow plug with a pressure detecting device in a sectional view
- Figure 2 shows an enlarged view of a ceramic heating element below a
- FIG. 3 shows an embodiment of a joint of a two-part sleeve-shaped sealing element
- Figure 4 shows a further embodiment of the joint of the two parts of the sleeve-shaped sealing element
- Figure 5 shows a further embodiment of the sealing of the glow plug by forming a press fit and a support tube with reduced wall thickness
- Figure 6 the formation of the sealing of the glow plug by forming at least one bead in the support tube
- Figure 7 a materially joined to the support tube, sleeve-shaped sealing element and
- the glow plug shown in Figure 1 with pressure sensing device which is referred to below as Druckmessglühkerze 10, comprises a housing 11, in which a designed as a glow pin ceramic heater 12 and a sensor 13 are used for pressure detection.
- the sensor 13 is arranged in a sensor module 30.
- a radially symmetrical metal diaphragm 46 is used to seal the separate, preassembled sensor module 30, for example.
- the pressure applied to the metal diaphragm 46 is converted into a separate pressure measurement module.
- the pressure measuring module essentially comprises the ceramic heating element 12 fastened in the support tube 14, a compensation element 24 as well as a heat-insulating and force-transmitting element 26 and the separate sensor module 30, a fixing element 28.
- the ceramic heater 12 When exposed to a pressure, such as the pressure prevailing in the cylinder of an internal combustion engine, the ceramic heater 12 serves as a transmission element of the compressive force in the combustion chamber to the sensor module 30.
- the ceramic heater 12 is coupled via the support tube 14 to the metal diaphragm 46.
- the force acting on the ceramic heater 12 is transmitted to the sensor module 30 via the force path.
- the compensation element 24 is preferably made of a material with a specially adapted value of the thermal expansion coefficient (CTE) and is mainly used for thermal length compensation at higher temperatures.
- the upper thermal insulation and force transmission element 26 has the smallest possible value for the thermal conductivity and serves the maximum temperature reduction on the sensor module 30.
- the thermal insulation and compensation element 26 has a very high surface quality and high rigidity.
- Behind the sensor module 30 is the fixing 28.
- the sensor module 30 is held together between the radially symmetrical metal diaphragm 46 and the fixing member 28 by means of the sleeve-shaped sensor cage 32 shown in Figure 1,
- the sensor cage 32 is fastened by means of a weld, for example, as close as possible in the region of a sealing cone 34.
- the glow current to the ceramic heater 12 is supplied to this via a Glühstromtechnisch 20.
- a contacting of the Glühstromtechnisch 20 at one end face of the ceramic heater 12 is carried out at a contact 22.
- the axis of symmetry of the ceramic heater 12 is indicated by reference numeral 36.
- a sealing element 40 formed in annular form 18 is arranged on the support tube 14, which is formed in one piece here, on a combustion-chamber-side end face 16.
- Sealing element 40 is fixed by means of a shrink fit 38 on the peripheral surface of the ceramic heater 12. Subsequently, a non-positive or a material-fit joint connection 44 is produced on the combustion chamber-side end face 16 of the support tube 14, which is formed in one or more parts.
- a non-positive or a material-fit joint connection 44 is produced on the combustion chamber-side end face 16 of the support tube 14, which is formed in one or more parts.
- Sealing element 40 and the lateral surface of the ceramic heater 12 on the shrink fit 38 are realized, whereby a particularly good seal against the combustion chamber of the internal combustion engine is achieved.
- the support tube 14 usually made of metallic material has the task of fixing the ceramic heater 12.
- the ceramic heating element 12 is received in the support tube 14 in a cohesive connection, for example in a soldered connection.
- the solder joint serves on the one hand for fastening and sealing of the ceramic heater 12 within the support tube 14, on the other hand for electrical contacting of the ceramic heater 12 in the support tube 14.
- Another function of the support tube 14 is a hermetic, long-term sealing of the sensor module 30 against the effects of aggressive combustion media, especially against high combustion pressures, against sooting and accumulating soot particles as well as corrosion effects.
- the ceramic heater 12 is made of a ceramic having a relatively low coefficient of thermal expansion (CTE), while the material of the support tube 14 itself has a comparatively higher CTE (steel) value.
- the sealing element 40 is preferably made from a material having a CTE value which lies in the relevant operating temperature range below the CTE value of the ceramic heating element 12, approaches it or approaches it only insignificantly exceeds.
- Such a combination of properties of the material has the constructive advantage that the interference fit 38 between the sealing element 40 in annular form 18 and the ceramic heater 12 increases with increasing temperature. If the solder breaks between the jacket surface of the ceramic heating element 12 and the inner jacket of the support tube 14, the sealing of the pressure measuring glow plug 10 is still ensured by the sealing element 40 in annular form 18.
- metal alloys come into question, which have a so-called Invar effect. Above all, these alloys are characterized by an almost constant, invariant thermal expansion as a function of the temperature over a wide temperature range.
- the pressure measuring glow plug 10 comprises the metal diaphragm 46 above the one or more support tube 14.
- the metal diaphragm 46 is substantially radially symmetrical and forms a first joint 48 for the support tube 14 formed in one or more parts and a further, second one Joint 50 for sleeve-shaped in this embodiment sensor cage 32nd Der Sensor cage 32 in turn encloses the fixing element 28, the thermal insulation and force transmission element 26 and the compensation element 24.
- the Glühstromtechnisch 20 may - as shown in Figure 2 - run substantially straight, it may also include one or more helical turns, depending on the application.
- the sensor cage 32 encloses the sensor module 30, which cooperates in the embodiment shown in Figure 2 with the compensation element 24 and the thermal insulation and force transmission element 26.
- the sensor module 30 may be formed, for example, as a piezoelectric or as a piezoresistive sensor module for pressure measurement.
- the body of the Druckmessglühkerze 10 includes an opening 52 through which the support tube 14 extends.
- the ceramic heater 12 Inside the support tube 14 is the ceramic heater 12.
- the partially shown in Figure 2 ceramic heater 12 is enclosed along its axial extent in the support tube 14 by a solder joint.
- the combustion chamber-side end face 16 of the one or more parts designed support tube 14 is indicated, on which the sealing element 40 in annular form 18 abuts.
- the sealing element 40 rests on the one hand on the shrink fit 38 on the lateral surface of the ceramic heater 12 and on the other hand connected via the already mentioned in connection with Figure 1 cohesive connection 44 with the combustion chamber side end 16 of the support tube 14.
- the sealing of the ceramic heater 12 is effected by the arranged on the combustion chamber side end 16 of the one or more parts support tube 14 sealing element 40. This is secured via a frictional or cohesively formed joint connection 44 on the combustion chamber side end 16 of the one or more parts support tube 14 ,
- the sealing element 40 is made according to the proposed invention, made of a material having a CTE value, which is in the relevant operating temperature range below the CTE value of the ceramic heater 12 or approaches this or exceeds this insignificant.
- a property combination has the constructive advantage that the interference fit on the shrink fit 38 between the sealing element 40 and the ceramic heater 12 increases with increasing temperature.
- the sealing of the pressure sensing device by the Sealing element 40 can be ensured, which works reliably both at low and at higher operating temperatures.
- As material for the sealing element 40 a metal alloy with Invar effect is used.
- the base alloy having this property is a ferromagnetic, face-centered cubic FeNi alloy having a stoichiometry of approximately Fe 6S Ni 35 .
- This alloy is characterized by a nearly constant, invariant thermal expansion as a function of temperature over a wide temperature range.
- FIGS. 3 and 4 show further embodiments of sealing element 40.
- the sealing element 40 can also be designed as a sleeve 54, as described above.
- the support tube 14 and the sleeve 54 are fixed together at a joint 60.
- the joint 60 between the sleeve 54 and the support tube 14 can comprise at least one or more bevels, so that the configuration of an oblique joint 60 shown in FIG. When trained with bevels joint 60 results in an improvement of cohesive Fügbarkeit, in particular the weldability during manufacture. If, as shown in FIG.
- a sleeve 54 with inner profiling 55 is used, an increased Hertzian pressure on the contact line on the circumference of the ceramic heating element 12 can be realized. This improves the sealing effect. Furthermore, an additional seal can be achieved by the cohesive connection embodied at the joint 60.
- the joint 60 between the sealing element 54 and the support tube 14 may also be formed step-shaped, as shown in Figure 4.
- the stepped step seen in the axial direction is present on the support tube 14, which engages in a correspondingly configured inner recess of the sleeve 54.
- an improved Hertzian pressure can be achieved at the contact line on the circumference of the ceramic heating element 12.
- the metallic Invar effect alloy may be one of the base alloys listed below. Noteworthy is Fe-36Ni, commonly known as Invar, and also Fe-32Ni-5Co, commonly known as Superinvar. Furthermore, Fe-29Ni-17Co, which is commonly known as Kovar ® known to be used, as well as Fe-42Ni-Cr-Ti, which is commonly known as Ni-Span-C.
- the individual components of these alloys vary widely, namely (in% by weight below):
- Fe-36Ni, Fe-Ni42 and Fe-Ni43 generally known as Invar
- concentration ranges result for the individual alloying elements: Ni from 35.0 to 44.0% by weight, Mn ⁇ 1.0 % By weight, Si ⁇ 0.50% by weight and C ⁇ 0.10% by weight, remainder Fe.
- the following concentration ranges result: Ni from 31.0 to 33.0% by weight, Co from 4.0 to 6.0% by weight. %, Mn ⁇ 0.50 wt .-% and Si ⁇ 0.50 wt .-%, C ⁇ 0.10 wt .-%, balance Fe.
- Ni 28.0 to 30.0 wt%
- Co from 17.0 to 18.0 wt%
- Mn 0.50 Wt .-%
- Si ⁇ 0.30 wt .-%
- C ⁇ 0.05 wt .-%
- Ni from 41.0 to 43.0% by weight, Co from 6.0 to 7.0% by weight %, Mn ⁇ 1.0% by weight, Si ⁇ 0.50% by weight and C ⁇ 0.10% by weight, remainder Fe.
- the WA K reference values for the KOVAR ® alloy and of commonly used steels such as ferritic steels, and ceramics heater are listed (for example, silicon nitride-base).
- the table shows that a significant reduction in the CTE difference at the interface can be achieved by using this alloy instead of a steel.
- a good seal, in particular at higher temperatures, such as occur during operation of the internal combustion engine can be achieved.
- the sealing of the pressure-measuring glow plug 10 can also be realized only via the support tube 14.
- the support tube 14, made, for example, of Fe-29Ni-17Co has at a region facing away from the combustion chamber 12 'two adjacent sections 62 with reduced wall thickness. Between these sections 62 is another section which forms a shrink fit 38 with the ceramic heater 12, wherein the shrink fit 38 forms the sealing element 40 at this point.
- the support tube 14 bears against the preferably radially symmetrical metal diaphragm 46, which in turn encloses the Glühstromtechnisch 20 and the contacting 22 on the ceramic heater 12.
- the support tube 14 and the ceramic heater 12 are connected to each other in the kerzenangenahen area 12 ', for example via a solder connection 56.
- the solder connection 56 represents the electrical contacting of the ceramic heating element 12 and its attachment in the support tube 14.
- a clearance 58 is formed between the inner circumferential surface of the support tube 14 and the lateral surface of the ceramic heater 12. above the shrink fit 38 is filled with solder 56.
- FIG. 6 shows a further embodiment of the design of the seal of the pressure-measuring glow plug 10.
- the pressure measuring glow plug 10 comprises a sealing cone 34.
- the support tube 14 is received, which is preferably made of a metallic alloy, such as Fe-29Ni-17Co.
- the support tube 14 is adjacent to the metal membrane 46, which is preferably formed radially symmetrical and the contact 22 and the Glühstrom effet 20 encloses.
- the support tube 14 forms in the upper region of the ceramic heater 12 to the lateral surface a clearance fit, which is filled with solder 56. From the embodiment according to FIG. 6, it can be seen that at least one peripheral bead 64 extends in the axial direction of the support tube 14.
- the Filling of solder 56 which serves for the electrical contacting of the ceramic heater 12, extends to above the peripheral bead 64.
- the at least one circumferential bead 64 of the shrink fit 38 between the outer surface of the ceramic heater 12 and the inner circumferential surface of the support tube 14 is formed.
- the at least one peripheral bead 64 on the circumference of the support tube 14 a local interference fit with gentle course of the joint pressure in the direction of the edge of the press fit 38 can be achieved with the ceramic heater 12.
- the sealing element 40 is formed between the support tube 14 and the ceramic heater 12.
- the pressure measuring glow plug 10 comprises the sleeve 54, which is fastened in the region of the sealing cone 34 in the plug body of the pressure measuring glow plug 10.
- the sleeve 54 which is made of, for example, Fe-29Ni-17Co, is disposed on the region 12 'facing away from the combustion chamber.
- the sleeve 54 adjoins the preferably radially symmetrical metal diaphragm 46, which in turn encloses the contact 22 and the Glühstrom effet 20.
- the support tube made of conventional steel 14 is at a junction 68 with the sleeve 54, the material of Invar effect, such as Fe-29Ni-17Co, materially connected. While between the sleeve 54 and the peripheral surface of the ceramic heater 12 over the axial extent of the sleeve 54 of the shrink fit 38 is formed as a sealing element 40 in the form of a press fit to ensure tightness, is between the support tube 14 and the lateral surface of the ceramic heater 12, a clearance fit 66 filled with solder.
- the material of Invar effect such as Fe-29Ni-17Co
- the design according to FIG. 8 shows a design of the sealing of the pressure-measuring glow plug 10, the ceramic heating element 12 being surrounded by the support tube 14, and the clearance-filled clearance 66 present between the lateral surface of the ceramic heating element 12 and the inner peripheral surface of the support tube 14 , 8 can be further removed, the support tube 14 is fixed in the opening 52 of the sealing cone 34 of the plug body of the Druckmessglühkerze 10 and adjacent to a preferably radially symmetrical metal diaphragm 46.
- the preferably radially symmetrical metal diaphragm 46 in turn enclosing the contact 22, in which the Glühstrom effet 20 is connected to the upper end face of the ceramic heater 12.
- the support tube 14 according to the embodiment shown in Figure 8, the pressure measuring glow plug 10 made of Fe-29Ni-17Co or the above procured base alloys and has a lower coefficient of thermal expansion (WAK) in the rear region 12 'on.
- WAK coefficient of thermal expansion
- the smallest thermally induced differences in length between the metallic material and the ceramic heating element 12 occur, so that the sleeve 54 forms there as a sealing element 40 due to the temperature distribution.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200831058T SI2135008T1 (en) | 2007-03-15 | 2008-03-06 | Glow plug |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007013127 | 2007-03-15 | ||
DE102007024393 | 2007-05-25 | ||
DE102008009429A DE102008009429A1 (en) | 2007-03-15 | 2008-02-15 | Seal for a glow plug |
PCT/EP2008/052720 WO2008110496A1 (en) | 2007-03-15 | 2008-03-06 | Seal for a glow plug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2135008A1 true EP2135008A1 (en) | 2009-12-23 |
EP2135008B1 EP2135008B1 (en) | 2013-07-03 |
Family
ID=39688418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08717467.8A Not-in-force EP2135008B1 (en) | 2007-03-15 | 2008-03-06 | Glow plug |
Country Status (6)
Country | Link |
---|---|
US (1) | US8003917B2 (en) |
EP (1) | EP2135008B1 (en) |
JP (1) | JP5119274B2 (en) |
DE (1) | DE102008009429A1 (en) |
SI (1) | SI2135008T1 (en) |
WO (1) | WO2008110496A1 (en) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007049971A1 (en) * | 2007-10-18 | 2009-04-23 | Robert Bosch Gmbh | glow plug |
JP5161121B2 (en) * | 2008-03-28 | 2013-03-13 | 日本特殊陶業株式会社 | Glow plug |
DE102009056057B4 (en) * | 2008-11-27 | 2016-04-21 | Borgwarner Ludwigsburg Gmbh | Glow plug and method for its production |
US8217309B2 (en) | 2008-12-15 | 2012-07-10 | Federal-Mogul Italy Srl. | Glow plug with pressure sensing canister |
DE102009011415B4 (en) * | 2009-03-03 | 2013-09-26 | Beru Ag | Ceramic glow plug |
DE102010055119B4 (en) * | 2010-12-18 | 2012-08-09 | Borgwarner Beru Systems Gmbh | glow plug |
EP2469171A1 (en) * | 2010-12-22 | 2012-06-27 | HIDRIA AET Druzba za proizvodnjo vzignih sistemov in elektronike d.o.o. | Glow plug with a plug body formed of multiple tubes end to end |
EP2472181B1 (en) * | 2010-12-22 | 2014-09-10 | HIDRIA AET Druzba za proizvodnjo vzignih sistemov in elektronike d.o.o. | Glow plug with a load sensing sleeve surrounding the heating rod outside the combustion chamber |
DE102011002596A1 (en) * | 2011-01-12 | 2012-07-12 | Robert Bosch Gmbh | Combustion chamber pressure sensor for detecting a pressure in a combustion chamber of an internal combustion engine |
JP5854638B2 (en) * | 2011-05-19 | 2016-02-09 | 株式会社ミクニ | Glow plug |
DE102011052565B4 (en) * | 2011-08-10 | 2019-04-18 | Vacuumschmelze Gmbh & Co. Kg | Thermoelectric module and method for producing a thermoelectric module |
JP5911399B2 (en) * | 2011-08-19 | 2016-04-27 | 日本特殊陶業株式会社 | Glow plug with combustion pressure detection sensor |
JP6151067B2 (en) * | 2012-06-28 | 2017-06-21 | 日本特殊陶業株式会社 | Glow plug with pressure sensor |
EP2725298B1 (en) * | 2012-10-26 | 2017-11-22 | SIEVA d.o.o., PE Spodnja Idrija | Method of manufacturing a bi-material glow plug |
WO2014122958A1 (en) * | 2013-02-08 | 2014-08-14 | ボッシュ株式会社 | Pressure sensor-type glow plug and method for producing same |
US9829197B2 (en) * | 2013-02-08 | 2017-11-28 | Bosch Corporation | Pressure-sensor-integrated glow plug and manufacturing method thereof |
DE102013219266A1 (en) | 2013-09-25 | 2015-03-26 | Robert Bosch Gmbh | Glow plug with integrated pressure sensor |
DE102013112806B4 (en) * | 2013-11-20 | 2016-06-23 | Borgwarner Ludwigsburg Gmbh | Method for producing a glow plug |
JP6228861B2 (en) * | 2014-02-18 | 2017-11-08 | 株式会社Soken | Glow plug integrated combustion pressure sensor |
US10253982B2 (en) * | 2014-12-22 | 2019-04-09 | Ngk Spark Plug Co., Ltd. | Glow plug with pressure sensor |
DE102016114929B4 (en) * | 2016-08-11 | 2018-05-09 | Borgwarner Ludwigsburg Gmbh | pressure measuring glow |
JP7037338B2 (en) * | 2017-11-24 | 2022-03-16 | ボッシュ株式会社 | Glow plug |
DE102018108427B3 (en) * | 2018-04-10 | 2019-07-25 | Borgwarner Ludwigsburg Gmbh | Heating rod for a glow plug and method for producing a heating rod and glow plug |
CN114342196B (en) | 2019-09-06 | 2022-09-27 | 联邦-富豪燃气有限责任公司 | Electrode material for spark plug |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
JP2002098333A (en) * | 2000-09-26 | 2002-04-05 | Ngk Spark Plug Co Ltd | Glow plug |
JP4562315B2 (en) * | 2001-06-07 | 2010-10-13 | 日本特殊陶業株式会社 | Ceramic heater, ceramic heater manufacturing method, and glow plug |
JP2002367760A (en) * | 2001-06-11 | 2002-12-20 | Ngk Spark Plug Co Ltd | Heater and glow plug |
JP4559671B2 (en) * | 2001-08-28 | 2010-10-13 | 日本特殊陶業株式会社 | Glow plug and manufacturing method thereof |
JP2003148731A (en) * | 2001-08-28 | 2003-05-21 | Ngk Spark Plug Co Ltd | Glow plug |
US7402777B2 (en) * | 2004-05-20 | 2008-07-22 | Alexza Pharmaceuticals, Inc. | Stable initiator compositions and igniters |
DE102004043874A1 (en) * | 2004-09-10 | 2006-03-16 | Robert Bosch Gmbh | Device for detecting the pressure in a combustion chamber of an internal combustion engine |
DE102005017802A1 (en) | 2005-04-18 | 2006-10-19 | Robert Bosch Gmbh | Glow plug with combustion chamber pressure sensor and sealing element |
-
2008
- 2008-02-15 DE DE102008009429A patent/DE102008009429A1/en not_active Withdrawn
- 2008-03-06 US US12/305,054 patent/US8003917B2/en not_active Expired - Fee Related
- 2008-03-06 EP EP08717467.8A patent/EP2135008B1/en not_active Not-in-force
- 2008-03-06 SI SI200831058T patent/SI2135008T1/en unknown
- 2008-03-06 WO PCT/EP2008/052720 patent/WO2008110496A1/en active Application Filing
- 2008-03-06 JP JP2009553114A patent/JP5119274B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2008110496A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102008009429A1 (en) | 2008-09-18 |
US8003917B2 (en) | 2011-08-23 |
JP5119274B2 (en) | 2013-01-16 |
EP2135008B1 (en) | 2013-07-03 |
US20090321408A1 (en) | 2009-12-31 |
WO2008110496A1 (en) | 2008-09-18 |
JP2010521645A (en) | 2010-06-24 |
SI2135008T1 (en) | 2014-03-31 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20091015 |
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