EP3027970A1 - Glühstiftkerze mit keramischem heizelement mit innenliegender kontaktierung, und herstellungsverfahren derselben - Google Patents
Glühstiftkerze mit keramischem heizelement mit innenliegender kontaktierung, und herstellungsverfahren derselbenInfo
- Publication number
- EP3027970A1 EP3027970A1 EP14752286.6A EP14752286A EP3027970A1 EP 3027970 A1 EP3027970 A1 EP 3027970A1 EP 14752286 A EP14752286 A EP 14752286A EP 3027970 A1 EP3027970 A1 EP 3027970A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glow plug
- connecting element
- heating element
- plug according
- receiving part
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/027—Heaters specially adapted for glow plug igniters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2214/00—Aspects relating to resistive heating, induction heating and heating using microwaves, covered by groups H05B3/00, H05B6/00
- H05B2214/03—Heating of hydrocarbons
Definitions
- the invention relates to a glow plug or glow plug, and more particularly to a ceramic glow plug for arrangement in a chamber of an internal combustion engine, such as a forward, swirl or combustion chamber of an air compressing,
- the invention relates to a production method of such a glow plug according to the invention.
- diesel engines are widely used, which have a higher efficiency compared to gasoline-fueled internal combustion engines.
- diesel engines require during the
- Diesel engines usually each have at least one electrically heatable glow plug, also called GLP (by the English term “glow plug"), by means of which the diesel engine is preheated in the startup phase glow plugs may have a heating element made of metal or ceramic, also called glow plug
- GLP electrically heatable glow plug
- glow plugs may have a heating element made of metal or ceramic, also called glow plug
- the glow plug is usually made of electrically insulating
- Ceramic material such as silicon nitride, may be embedded in the highly electrically conductive leads and an internal heating conductor.
- the heating and control function is combined in the heating element.
- the ceramic glow plug is fixed in a metal tube and gas-tight pressed into a glow plug.
- the electrical contacting of the positive pole of the glow plug which is usually provided by a provided at one end of the glow plug contact point of the heating element, takes place by a connecting bolt, which is connected via a wire to the positive pole of the ceramic glow plug, and the electrical contact of the Minuspols the glow plug, that is, the ground connection to the engine block is made via the metal tube of the glow plug and the housing.
- DE 100 30 924 A1 discloses a glow plug 9, as shown in FIG. 2 in a schematic sectional view.
- Glow plug 9 consists in principle of a heating element 91, a present in the form of a central electrode of the glow plug, for example, connecting pin 92, a
- Sheathed glow plug housing is disposed between the heating element and the connecting bolt.
- the graphite tablet is held in each of the DE 10 2009 045 273 A1 removable embodiments by a solid ceramic element in the form of a ceramic ring and isolated from the housing.
- the known solution by a wire bonding, as described above, inter alia, is expensive to manufacture, must be soldered at the increased, which makes the installation of the glow plug difficult and expensive.
- the ground connection to the engine always takes place via the plug housing. For this reason, the complete must
- Plus path relative to the housing which usually consists of metal, are electrically insulated.
- the housing which usually consists of metal, are electrically insulated.
- ceramic or plastic sleeves are used, which fix the graphite tablet in the housing and electrically insulated from this.
- an electrically heatable glow plug with the features of claim 1 is proposed, preferably for the cold start aid of a self-igniting internal combustion engine, such as a diesel engine.
- Advantageous developments of the invention are characterized by the features of the dependent claims.
- an electrically heatable glow plug according to the invention comprises a receiving part, a ceramic heating element held in the receiving part with a positive pole and a negative pole, an electrically conductive connecting pin which is in electrical connection with the positive pole, and an electrically conductive connecting element is arranged between the terminal bolt and the positive pole.
- at least the positive pole and the connecting element are arranged in a recess in the heating element.
- the receiving part is usually a tubular component, preferably a support tube, which may be formed either as a separate part or sometimes as part of a housing of the glow plug.
- the ceramic heating element of the glow plug according to the invention also called glow plug, consists in principle of electrically insulating ceramic material, for example silicon nitride, in which highly electrically conductive leads and an internal heating conductor can be embedded, as is known from the prior art discussed above, wherein the heating and cooling elements are embedded Control function is combined in the heating element.
- the positive terminal is formed by one end of the heating conductor, which according to the invention is exposed to the recess, unlike the prior art, and the negative terminal is connected by a connection of the heating conductor the outer shell of the glow plug instead, which is connected via the receiving part and the housing of the glow plug, which are preferably formed of metal, with the engine block as a ground connection.
- the glow plug according to the invention may be formed so that a dimension of the recess in the width direction is greater than a dimension of the connecting element in the width direction, ie a width extension of the recess perpendicular to the longitudinal axis of the heating element greater than one
- Width extension of the connecting element is perpendicular to the longitudinal axis, preferably with a dimension range of the width dimension of the recess of 1 to 2mm. This can be achieved that the connecting element between
- Connecting element have a tablet form, wherein the connecting element further preferably consists of elastic material.
- the connecting element further preferably consists of elastic material.
- Connecting element designed as a compact and / or as produced by a conventional ceramic manufacturing process element.
- the conductive wire designed as a compact and / or as produced by a conventional ceramic manufacturing process element.
- Connecting element has in this case electrically conductive properties, wherein the conductive connecting element may comprise, for example, one or more of the following materials in solidified form: a metal powder, in particular a silver powder; a conductive ceramic powder; a graphite. Graphite is preferably used as the material for the connecting element. A wrapped metal mesh would be considered
- the connecting element also conceivable, wherein the metal should not oxidize.
- examples of such a metal are copper, bronze, brass, steel, stainless steel, nickel.
- the use of other suitable electrically conductive materials is possible.
- a combustion chamber-side end or a combustion chamber-side portion of the connecting bolt which is in communication with the connecting element to an electrical contact between the terminal bolt and the positive pole of
- Terminal bolt can be permanently maintained with the positive pole of the heating element via the connecting element, without being prone to disconnections due to slight displacements between the individual components.
- Connecting element in the recess can thereby distribute the connecting element around the arranged in the recess end of the connecting bolt around and to invest in this.
- the bias of the connecting element or the connecting bolt must also be held by suitable measures in the region of the receiving part or the housing, with a variety of solutions are conceivable.
- Heating element is achieved isolation of these components relative to the usually electrically conductive receiving part, which can be dispensed with additional insulating components between receiving part, connecting bolt and connecting component.
- the cavity may be at least partially filled with a material, preferably a ceramic powder such as magnesium oxide and / or alumina, wherein the powder may be compacted, for example by the receiving part by a
- the glow plug according to the invention may further comprise a cover component.
- the lid member may be a seal that seals the cavity to hold the ceramic powder in the receiving part and dirt and Moisture does not penetrate. Additionally or alternatively, the lid member may be implemented in the form of an electrically insulating sleeve, which
- Connection bolt against the receiving component additionally electrically isolated and mechanically supported.
- a method for producing a previously described electrically heatable glow plug comprises in particular the step of biasing the connecting bolt against the connecting element.
- the connecting element is arranged in the recess of the heating element and is in electrical connection with the positive pole of the heating element.
- one end of the connecting bolt which is connected to the connecting element in order to produce an electrical contact between the connecting bolt and the positive pole of the heating element, is arranged at least partially in the recess of the heating element.
- a glow plug according to the invention has over the above-discussed prior art due to the use of the connecting element the advantage that no wires for contacting between the terminal bolt and the heating element of the glow plug are used, whereby a soldering of wires between these components is unnecessary and this reduces the cost of the entire manufacturing process and reduces waste due to the usually difficult and sometimes faulty assembly. Furthermore, by the inventive solution with internal contact, ie arranged in the interior of the ceramic heater connecting member and combustion chamber end of the connecting bolt an additionally provided support the connecting bolt, at least on the side of the heating element, as well as a separate insulation of the connecting bolt relative to the receiving part, for example a ceramic insulating sleeve, be avoided, which in turn components and assembly steps are reduced and thereby further
- Figure 1 is a schematic cross-sectional view of a part of a glow plug according to a preferred embodiment of the invention.
- Figure 2 is a schematic cross-sectional view of a glow plug according to the prior art. Preferred embodiment of the invention
- Figure 1 shows a schematic sectional view of a front part of a preferred embodiment of a glow plug 1 according to the present invention.
- Sheathed-element glow plug 1 consists of a receiving part or support tube 2, a heating element or glow plug 3, a connecting bolt 4, a connecting component or
- a cavity 6 which may optionally be filled with a ceramic powder, such as a magnesium oxide and or alumina, which can be compressed, for example by the diameter of the support tube 2 by a ceramic powder, such as a magnesium oxide and or alumina, which can be compressed, for example by the diameter of the support tube 2 by a ceramic powder, such as a magnesium oxide and or alumina, which can be compressed, for example by the diameter of the support tube 2 by a
- the thus compacted powder supports the arrangement of the connecting bolt 4 in the interior of the metal support tube 2 and its electrical insulation with respect to the inner wall of the support tube 2.
- the contacting of the ceramic glow plug 3 is provided so that the positive pole 31 of the glow plug 3 in a
- Recess 33 of the glow plug 3 is provided on the side remote from the combustion chamber, so to speak as inside positive pole contacting, and wherein the negative terminal 32, optionally as a coating, is provided on the brennraumabgewandten end of the glow plug 3, wherein the negative terminal 32 in direct contact with a tapered portion 21 of the support tube 2 is by the glow plug 3 is pressed or soldered into this and the optional coating between glow plug 3 and section 21 is located.
- the shape of the Supporting tube 2, in particular the provision of a tapered portion 21 at the combustion chamber end of the support tube 2 is not mandatory, and any other
- Cross-sectional shape of the support tube 2 is also conceivable, for example, a cylindrical shape with the same diameter or the like throughout.
- the graphite tablet 5 For continuous maintenance of the positive electrical contact, the graphite tablet 5 must be under tension, the graphite tablet 5 being elastic in this preferred embodiment for this purpose.
- the connecting bolt 4 When mounting the glow plug 1 according to the invention, the connecting bolt 4 is pressed into the support tube 2, so that the elastic graphite tablet 5, which is located completely in the recess 33, is biased.
- a combustion chamber-side end 41 of the connecting bolt 4 is likewise located at least partially in the recess 33 of the glow plug 3.
- the end of the ceramic glow plug 3 remote from the combustion chamber assumes the insulation with respect to the support tube 2.
- Glow pin end face 34 provided recess 33 having an inner diameter, the width of which is greater than the outer diameter of the circular
- Graphite tablet 5 is.
- the graphite of the tablet 5 can flow around the combustion chamber end 41 of the connecting bolt 4 to a certain extent or spread around it, so that the connection between the connecting pin 4 and the ceramic glow plug 3 is formed as an elastic connection.
- This can, for example, vibrations of the glow plug 1 according to the invention during use in a diesel engine or be equalized without interrupting a contact between terminal pin 4 and glow plug 3 or deteriorate.
- the cavity 6 of the preferred embodiment of the glow plug according to the invention may also be sealed with the sealing washer 7 so as not to allow dirt and moisture to penetrate and / or to hold the optional ceramic powder in the receiving part.
- the outer diameter of the sealing washer 7 is in contact with the inner diameter of a wide portion 22 of the support tube 2. Further, the
- Gasket 7 implemented in the embodiment shown in Figure 1 as an electrically insulating sleeve, in the middle of a recess 71 is provided, in which the
- Connection bolt 4 is arranged to be stored, whereby the connecting bolt 4 is additionally electrically insulated from the support tube 2. On one or more additional
- Insulating components between the terminal bolt 4 and the support tube 2 can be dispensed with.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013215269.8A DE102013215269A1 (de) | 2013-08-02 | 2013-08-02 | Glühstiftkerze mit einem Heizelement mit innen liegender Kontaktierung, und Herstellungsverfahren derselben |
PCT/EP2014/066283 WO2015014844A1 (de) | 2013-08-02 | 2014-07-29 | Glühstiftkerze mit keramischem heizelement mit innenliegender kontaktierung, und herstellungsverfahren derselben |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3027970A1 true EP3027970A1 (de) | 2016-06-08 |
EP3027970B1 EP3027970B1 (de) | 2018-05-16 |
Family
ID=51355514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14752286.6A Not-in-force EP3027970B1 (de) | 2013-08-02 | 2014-07-29 | Glühstiftkerze mit keramischem heizelement mit innenliegender kontaktierung, und herstellungsverfahren derselben |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3027970B1 (de) |
JP (1) | JP2016522386A (de) |
DE (1) | DE102013215269A1 (de) |
WO (1) | WO2015014844A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016121346B4 (de) * | 2016-10-27 | 2018-05-09 | Borgwarner Ludwigsburg Gmbh | Glühkerze |
DE102018108427B3 (de) * | 2018-04-10 | 2019-07-25 | Borgwarner Ludwigsburg Gmbh | Heizstab für eine Glühkerze sowie Verfahren zur Herstellung eines Heizstabs und Glühkerze |
US20230130672A1 (en) * | 2021-10-22 | 2023-04-27 | Bloom Energy Corporation | Glow plug for a fuel cell system |
JP2023063254A (ja) * | 2021-10-22 | 2023-05-09 | ブルーム エネルギー コーポレイション | グロープラグ及び固体酸化物燃料電池システム |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4816643A (en) * | 1985-03-15 | 1989-03-28 | Allied-Signal Inc. | Glow plug having a metal silicide resistive film heater |
US5880432A (en) * | 1996-12-23 | 1999-03-09 | Le-Mark International Ltd. | Electric heating device with ceramic heater wedgingly received within a metalic body |
JP3810947B2 (ja) | 1999-06-16 | 2006-08-16 | ボッシュ株式会社 | セラミックヒータ型グロープラグ |
US6884967B1 (en) * | 1999-06-16 | 2005-04-26 | Chongging Le-Mark Ceramic Technology Co. Ltd. | Multi-layer ceramic heater element and method of making same |
ATE265023T1 (de) * | 1999-08-27 | 2004-05-15 | Bosch Gmbh Robert | Keramische glühstiftkerze |
DE10030924A1 (de) | 2000-06-24 | 2002-01-03 | Bosch Gmbh Robert | Glühstiftkerze |
JP2005180855A (ja) * | 2003-12-22 | 2005-07-07 | Bosch Automotive Systems Corp | セラミックスヒータ型グロープラグ |
US20070221647A1 (en) * | 2006-03-23 | 2007-09-27 | Federal-Mogul World Wide, Inc. | Multi-layer heating element |
DE102009045273A1 (de) | 2009-10-02 | 2011-04-07 | Robert Bosch Gmbh | Verfahren zum Herstellen einer Glühkerze |
-
2013
- 2013-08-02 DE DE102013215269.8A patent/DE102013215269A1/de not_active Withdrawn
-
2014
- 2014-07-29 EP EP14752286.6A patent/EP3027970B1/de not_active Not-in-force
- 2014-07-29 WO PCT/EP2014/066283 patent/WO2015014844A1/de active Application Filing
- 2014-07-29 JP JP2016520544A patent/JP2016522386A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2015014844A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102013215269A1 (de) | 2015-02-05 |
WO2015014844A1 (de) | 2015-02-05 |
EP3027970B1 (de) | 2018-05-16 |
JP2016522386A (ja) | 2016-07-28 |
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