EP2201298A2 - Glow plug having coking-optimized design - Google Patents
Glow plug having coking-optimized designInfo
- Publication number
- EP2201298A2 EP2201298A2 EP08801195A EP08801195A EP2201298A2 EP 2201298 A2 EP2201298 A2 EP 2201298A2 EP 08801195 A EP08801195 A EP 08801195A EP 08801195 A EP08801195 A EP 08801195A EP 2201298 A2 EP2201298 A2 EP 2201298A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- glow plug
- annular gap
- space
- cylinder head
- internal combustion
- 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.
- glow plugs are known for. B. from DE 10346295. This is disadvantageous that takes place during normal operation of the glow plugs in an internal combustion engine, coking of the glow plugs between the heating element and cylinder head and in the annular gap of the glow plug, thereby causing problems in disassembly of the mounted in the cylinder head glow plugs and Drucksensorglühkerzen , as well as the heat conduction on or in the glow plug.
- Figure 1 Installation situation of the glow plug with volume in the cylinder head according to the
- FIG. 3 glow plug with varied volume and two-part body
- FIG. 5 Volume and annular gap Description
- FIG. 8 pressure sensor
- FIG. 2 shows a glow plug arranged in a cylinder head 5, which has an annular gap 3 arranged between heating rod 1 and body 2 of the glow plug and a space 4 adjoining the annular gap 3, which communicates with the combustion chamber of the internal combustion engine in the manner of an annular gap 3, that oxygen-containing gas enters the room 4.
- annular gap 3 and the space 4 there is the possibility of a volume flow from the combustion chamber of the internal combustion engine in the space 4, which ensures a reliable gas exchange and thus for a sufficient oxygen content in the contact surfaces between the cylinder head and glow plug.
- very high temperatures are achieved in the annular gap 3 and in the free space 4 by means of oxidative processes. As a result of these high temperatures, the carbon present in this region is burned, which thus can not be deposited in the region relevant for trouble-free operation of an internal combustion engine.
- this annular gap 3 / free space 4 combination is provided for movably holding the heating element 1.
- a corresponding volume can be achieved, which in a particularly advantageous embodiment comprises approximately 140 mm 3 in order to allow sufficient combustion gas flow.
- the defined annular gap 3 and the corresponding free space 4, which allows a volume as described above for gas exchange during the combustion process, is based on the principle of the so-called Helmholtz resonator.
- the volume of the hollow Helmholtz hollow body is composed of the annular gap volume formed from b and c.
- the radius of the Helmholtz tube results, as can likewise be seen in FIG. 5, from the dimension at the annular gap 3, the inner length of the annular gap 3 corresponding to the length of the tube 1 of the Helmholtz formula.
- the effect can be enhanced by a targeted and advantageous coating of the surfaces with a catalytically active material.
- a platinum coating is particularly advantageous here.
- At least one element such as the bellows consists of a catalyst-containing coating and / or material pairing in order to lower the ignition temperature for combustion residues.
- Suitable catalyst materials are, for example, platinum and / or palladium, cerium iron, Raney nickel, rhodium, hopkalite, vanadium pentoxide and samarium oxide. Any other element of the described glow plug may also be catalyst coated. In temperature measurements with the described inventive configurations, temperatures were measured at which the carbon burns without residue.
- FIG. 2 shows a glow plug arranged in a cylinder head 5, which has an annular gap 3 arranged between heating rod 1 and body 2 of the glow plug and a space 4 adjoining the annular gap 3, which communicates with the combustion chamber of the internal combustion engine in the manner of an annular gap 3 in that oxygen-containing gas enters the room 4.
- annular gap 3 and the space 4 there is the possibility of a volume flow from the combustion chamber of the internal combustion engine in the space 4, which ensures a reliable gas exchange and thus for a sufficient oxygen content in the contact surfaces between the cylinder head and glow plug.
- the annular gap 3 and in the free space 4 by means of complete combustion temperatures above 600 degrees or less, when a corresponding catalyst surface is present, Celsius is reached. As a result of these high temperatures, the carbon present in this region is burned, which thus can not be deposited in the region relevant for trouble-free operation of an internal combustion engine.
- FIG. 3 shows a glow plug arranged in a cylinder head 5, which has an annular gap 3 arranged between heating rod 1 and two-part body 2 of the glow plug and a space 4 adjoining the annular gap 3, which communicates with the combustion chamber of the fuel-cell engine by means of annular gap 3 in such a way in that oxygen-containing gas enters the room 4.
- annular gap 3 and the space 4 there is the possibility of a volume flow from the combustion chamber of the internal combustion engine in the space 4, which ensures a reliable gas exchange and thus for a sufficient oxygen content in the contact surfaces between the cylinder head and glow plug.
- very high temperatures are achieved in the annular gap 3 and in the free space 4 by means of oxidative processes. As a result of these high temperatures, the carbon present in this region is also burned, which thus can not be deposited in the region relevant for trouble-free operation of an internal combustion engine.
- a glow plug arranged in a cylinder head 5, which is arranged between heating element 1 and body 2 of the glow plug, with the additional space 8, whose length is attributable to the length of the tube in the Helmholtz formula, annular gap 3 whose radius corresponds to the radius of the Pipe corresponds in the Helmholtz formula and has a subsequent to the annular gap 3 space 4, which communicates by means of annular gap 3 with the combustion chamber of the internal combustion engine in such a way that oxygen-containing gas enters the room 4 shown.
- the free space 4 is produced by a two-part body 2, 2a, as shown in FIG. 7, by means of the body upper part (2) and body lower part (2a), wherein the body parts 2, 2a are arranged around the heating bar 1.
- FIG. 6 shows a movable heating element 1 with a bellows 7, which together with the body 2 produces a glow plug in a cylinder head 5. Between body 2 and heating element 2 there is an annular gap 3. The bellows 7 is arranged in a movable space 4. The space 4 and the annular gap 3 communicate with the combustion chamber arranged in the cylinder head 5, which also is not expressly shown, internal combustion engine.
- FIG. 8 shows a pressure sensor which, as shown in FIG. 6, is arranged in a cylinder head 5 of an internal combustion engine (not shown).
- the pressure sensor comprises a two-part housing 2, 2a, which may also be in one piece, as shown in FIG.
- a bellows 7 between the housing 2 and push rod Ia is arranged thereon, that the push rod Ia is movable together with the bellows 7 substantially along its longitudinal axis.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Resistance Heating (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007044967A DE102007044967A1 (en) | 2007-09-19 | 2007-09-19 | Glow plug with coking-optimized design, special annular gap formation |
PCT/DE2008/001372 WO2009036724A2 (en) | 2007-09-19 | 2008-08-21 | Glow plug having coking-optimized design |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2201298A2 true EP2201298A2 (en) | 2010-06-30 |
EP2201298B1 EP2201298B1 (en) | 2015-03-04 |
Family
ID=40364418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08801195.2A Not-in-force EP2201298B1 (en) | 2007-09-19 | 2008-08-21 | Glow plug having coking-optimized design |
Country Status (7)
Country | Link |
---|---|
US (1) | US8479697B2 (en) |
EP (1) | EP2201298B1 (en) |
KR (1) | KR20100069654A (en) |
CN (1) | CN101828076A (en) |
DE (1) | DE102007044967A1 (en) |
RU (1) | RU2480676C2 (en) |
WO (1) | WO2009036724A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010011044B4 (en) * | 2010-03-11 | 2012-12-27 | Borgwarner Beru Systems Gmbh | Method for controlling a glow plug |
GB2500215B (en) * | 2012-03-12 | 2018-07-11 | Gm Global Tech Operations Llc | Design optimization for an in-cylinder sensor seat |
JP5965181B2 (en) * | 2012-03-29 | 2016-08-03 | 日本特殊陶業株式会社 | Glow plug and manufacturing method thereof |
JP5872697B2 (en) * | 2012-08-09 | 2016-03-01 | ボッシュ株式会社 | Glow plug with integrated pressure sensor |
DE102013111922B4 (en) | 2013-10-29 | 2016-04-14 | Borgwarner Ludwigsburg Gmbh | glow plug |
JP2015190689A (en) * | 2014-03-28 | 2015-11-02 | 日本特殊陶業株式会社 | internal combustion engine |
JP6225925B2 (en) * | 2015-01-28 | 2017-11-08 | トヨタ自動車株式会社 | Internal combustion engine |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3307109A1 (en) | 1982-08-14 | 1984-03-15 | Robert Bosch Gmbh, 7000 Stuttgart | DEVICE FOR INJECTING FUEL INTO COMBUSTION ROOMS, IN PARTICULAR SELF-IGNITION COMBUSTION ENGINES |
DE19506711C1 (en) * | 1995-02-25 | 1996-05-09 | Beru Werk Ruprecht Gmbh Co A | Flame glow plug for Diesel engines |
DE19506950C2 (en) * | 1995-02-28 | 1998-07-23 | Bosch Gmbh Robert | Glow plug for diesel engines |
DE19849120C2 (en) * | 1998-10-23 | 2000-09-28 | Beru Ag | Glow plug |
JP4121342B2 (en) * | 2001-11-13 | 2008-07-23 | 日本特殊陶業株式会社 | Metal part for plug with chromate coating and method for manufacturing the same |
RU2229062C2 (en) * | 2002-08-20 | 2004-05-20 | Общество с ограниченной ответственностью "Общемаш" | Hot-bulb ignition burner |
JP3900059B2 (en) | 2002-10-07 | 2007-04-04 | 株式会社デンソー | Mounting structure and mounting method of glow plug with combustion sensor and glow plug with combustion pressure sensor |
DE102004044727A1 (en) * | 2003-09-19 | 2006-03-16 | Beru Ag | Pressure-measuring glow plug for diesel engine, has heating rod arranged in plug body to slide in axial direction relative to plug body, where seal in form of bellows-shaped component is provided between heating rod and plug body |
DE102004011098A1 (en) | 2004-03-06 | 2005-09-22 | Robert Bosch Gmbh | Device for detecting the combustion chamber pressure in an internal combustion engine |
FR2869393B1 (en) * | 2004-04-27 | 2006-07-14 | Siemens Vdo Automotive Sas | DEVICE FOR ACTING ON A PRESSURE SENSOR MOUNTED ON A PREHEATING CANDLE |
ATE544034T1 (en) * | 2004-09-15 | 2012-02-15 | Beru Ag | PRESSURE MEASUREMENT GLOW PLUG FOR A DIESEL ENGINE |
DE102004045383A1 (en) | 2004-09-18 | 2006-03-23 | Robert Bosch Gmbh | Glow plug with combustion chamber pressure sensor |
DE102004063750A1 (en) * | 2004-12-29 | 2006-07-13 | Robert Bosch Gmbh | Glow plug with integrated combustion chamber pressure sensor |
JP4903165B2 (en) * | 2005-02-24 | 2012-03-28 | キストラー ホールディング アクチエンゲゼルシャフト | Piezoelectric force sensor parts or piezoelectric pressure sensor parts held by an electrical insulating film |
DE102005015569A1 (en) | 2005-04-05 | 2006-10-12 | Robert Bosch Gmbh | Ceramic resistance or sensor element |
DE102005042667A1 (en) * | 2005-09-08 | 2007-03-15 | Robert Bosch Gmbh | Pressure measuring device for measuring very high fluid pressure, has sensor element and two application surfaces which connected by deformable bridge element and to which the force applied by piston element and counter force add |
DE102006008350A1 (en) * | 2006-02-21 | 2007-08-30 | Robert Bosch Gmbh | Pressure measuring glow plug for arranging in chamber of internal combustion engine has centering element and pressure sensor assembled together, wherein centering section of centering element engages in recess of pressure sensor |
-
2007
- 2007-09-19 DE DE102007044967A patent/DE102007044967A1/en not_active Withdrawn
-
2008
- 2008-08-21 CN CN200880108407A patent/CN101828076A/en active Pending
- 2008-08-21 EP EP08801195.2A patent/EP2201298B1/en not_active Not-in-force
- 2008-08-21 WO PCT/DE2008/001372 patent/WO2009036724A2/en active Application Filing
- 2008-08-21 RU RU2010115078/07A patent/RU2480676C2/en not_active IP Right Cessation
- 2008-08-21 US US12/678,736 patent/US8479697B2/en not_active Expired - Fee Related
- 2008-08-21 KR KR1020107006347A patent/KR20100069654A/en active Search and Examination
Non-Patent Citations (1)
Title |
---|
See references of WO2009036724A2 * |
Also Published As
Publication number | Publication date |
---|---|
DE102007044967A1 (en) | 2009-04-02 |
RU2480676C2 (en) | 2013-04-27 |
WO2009036724A3 (en) | 2009-06-11 |
US20100236512A1 (en) | 2010-09-23 |
EP2201298B1 (en) | 2015-03-04 |
RU2010115078A (en) | 2011-10-27 |
KR20100069654A (en) | 2010-06-24 |
US8479697B2 (en) | 2013-07-09 |
WO2009036724A2 (en) | 2009-03-26 |
CN101828076A (en) | 2010-09-08 |
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Inventor name: VOLLAND, KARSTEN Inventor name: PECHHOLD, FRANK Inventor name: EHLERT, RALF Inventor name: POTTIEZ, CHRISTIAN Inventor name: HAUSSNER, MICHAEL Inventor name: VON HACHT, DIRK Inventor name: LAST, BERND Inventor name: HOUBEN, HANS |
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