EP2669578B1 - Glühkerze - Google Patents
Glühkerze Download PDFInfo
- Publication number
- EP2669578B1 EP2669578B1 EP12739873.3A EP12739873A EP2669578B1 EP 2669578 B1 EP2669578 B1 EP 2669578B1 EP 12739873 A EP12739873 A EP 12739873A EP 2669578 B1 EP2669578 B1 EP 2669578B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axis
- contact member
- axial bore
- end portion
- center shaft
- 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.)
- Active
Links
- 230000008961 swelling Effects 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 description 36
- 238000009413 insulation Methods 0.000 description 20
- 239000000463 material Substances 0.000 description 11
- 239000000758 substrate Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000010355 oscillation Effects 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229920001973 fluoroelastomer Polymers 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 102200082816 rs34868397 Human genes 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
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 second contour segment having the radius R2 of curvature extends along the second axis with a radius of curvature greater than that of the first contour segment having the radius R1 of curvature.
- the second contour segment can function as a core which supports the entire contact member and restrains the contact member from bending and being dragged inward. Therefore, the contact member is restrained from bending or wrinkling at the second contour segment.
- the overlap region of the forward end portion 31 and the connection ring 85 is subjected to laser welding, whereby the forward end portion 31 and the connection ring 85 are joined together.
- the center shaft 3 is electrically connected to the electrode lead portion 26 of the ceramic heater 2 via the connection ring 85.
- the center shaft 3 and the metallic shell 4 are held mutually in an electrically insulated condition in the axial bore 43.
- connection terminal 5 is fixedly attached to the connection end portion 36 of the center shaft 3.
- the connection terminal 5 has a cap-like trunk portion 52 which is fitted externally to the connection end portion 36, and a pin-like protrusion 53 protruding rearward from the trunk portion 52.
- the trunk portion 52 has a flange portion 51 provided at its forward open end in such a manner as to radially project along the entire circumference.
- a plug cap (not shown) is fitted to the protrusion 53 of the connection terminal 5.
- the heat-generating element 24 (see FIG. 1 ) of the ceramic heater 2 generates heat through application of electricity between one end of the heat-generating resistor 27 which is grounded to the engine via the holding member 8 and the metallic shell 4, and the other end of the heat-generating resistor 27 which is connected to the plug cap via the connection terminal 5 and the center shaft 3.
- the contour 70 has three kinds of contour segments (line segments which constitute the contour); namely, a second contour segment 71, a first contour segment 72, and third contour segments 73.
- the second contour segment 71 extends in the form of a straight line along the axis P.
- the first contour segment 72 assumes the form of a curve extending along the axis P and swelling radially outward in a direction orthogonal to the axis P.
- the third contour segments 73 connect the second contour segment 71 and the first contour segment 72 at their ends located on the same side with respect to the axis P, and each of the third contour segments 73 assumes the form of a curve extending toward the outside of the cross section 75 while swelling.
- connections between the first contour segment 72 and the third contour segments 73 are upper and lower (forward and rear) ends of the contact member 7 with respect to the direction of the axis P.
- the first contour segment 72 is disposed radially outward of the second contour segment 71 and is longer in length along the direction of the axis P than the second contour segment 71. Therefore, each of the third contour segments 73 extends radially outward from the end of the second contour segment 71 and is connected to the end of the first contour segment 72. Furthermore, the contour 70 forms a mirror image with respect to the center position (represented by the dash-dot-dot line A-A in FIG. 3 ) in the direction of the axis P. That is, the contact member 7 has a symmetrical shape along the direction of the axis P.
- the contact member 7 can reliably hold the center shaft 3 in the axial bore 43 and thus can restrain oscillation of the center shaft 3 when the glow plug 1 receives external vibration or the like.
- the contact members 107, 207, and 307 shown in FIGS. 6 , 7, and 8 , respectively, are similar in preferred features to the contact member 7 of the present embodiment shown in FIG. 3 .
- the cross section is such that the length L1 along the extending direction of the axis P is longer than the length L2 along a direction orthogonal to the extending direction of the axis P (along a radial direction); i.e., the cross section has a short radial length so as to have a flat profile (L1 > L2).
- the cross section is such that the radial length L2 is half the length L1 along the direction of the axis P or less (L1/2 ⁇ L2).
- this relationship half of the length along the axis P > the radial length (L1/2 ⁇ L2)
- this relationship may not be satisfied so long as the relationship L1 > L2 is satisfied).
- connection base portion 37 of the center shaft 3 may have, at a position located toward its forward end, a stopper in the form of a flange or a protrusion for forming some level difference.
- a stopper in the form of a flange or a protrusion for forming some level difference.
- the stopper prevents movement of the contact member 7 to the intermediate trunk portion 33 of the center shaft 3.
- the contact member 7 may be disposed between the connection base portion 37 and the inner circumferential surface of the axial bore 43 in a noncontacting manner in relation to the insulation member 6.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
Claims (5)
- Glühkerze (1), umfassend:einen Heizer (2), der in einem vorderen Endabschnitt (22) einen wärmeerzeugenden Widerstand (27) aufweist, der Wärme durch Erregung erzeugt;eine metallische Hülle (4), die die Form eines Rohres mit einer axialen Bohrung (43) annimmt, die sich entlang einer ersten Achse (O) erstreckt, die die Achse der metallischen Hülle (4) ist, und die den Heizer (2) direkt oder indirekt an einem vorderen Endabschnitt (41) hält;einen zentralen Schaft (3), der eine stabförmige Form annimmt, die in der axialen Bohrung (43) der metallischen Hülle (4) mit einem Spalt angeordnet ist, der zwischen diesem und einer inneren Umfangsfläche der axialen Bohrung (43) gebildet ist, und der einen Endabschnitt (31) aufweist, der mit einem hinteren Endabschnitt (23) des Heizers (2) verbunden ist, und der einen anderen Endabschnitt (36) aufweist, der von einem hinteren Ende (48) der metallischen Hülle (4) vorsteht; undein Kontaktelement (7), das aus einem elektrisch isolierenden elastischen Element gebildet ist, das eine ringförmige Form annimmt, und das in die axiale Bohrung (43) an einem hinteren Endabschnitt der axialen Bohrung (43) eingesetzt ist und so angeordnet ist, dass es mit der inneren Umfangsfläche der axialen Bohrung (43) und mit dem zentralen Schaft (3) in Kontakt steht;die Glühkerze (1) istdadurch gekennzeichnet, dass:eine Kontur (70) eines (75) von zwei Querschnitten, die sich aus dem Schneiden des Kontaktelements (7) in einem Zustand vor der Befestigung an der Glühkerze (1) durch eine Ebene ergibt, die eine zweite Achse (P) enthält, die die Achse des Kontaktelements (7) aufweist,ein erstes Kontursegment (72) aufweist, das die Form einer Kurve annimmt, die sich entlang der zweiten Achse (P) erstreckt und mit einem Krümmungsradius R1 radial nach außen quillt, undein zweites Kontursegment (71) aufweist, das eines der folgenden a) oder b) annimmt:a) die Form einer geradlinigen Durchgangslinie, die sich entlang der zweiten Achse (P) erstreckt;b) die Form einer Kurve, die sich entlang der zweiten Achse (P) erstreckt und radial nach innen mit einem Krümmungsradius R2 anschwillt, der einer Ungleichung R1 < R2 genügt.
- Glühkerze (1) nach Anspruch 1, wobei das Kontaktelement (7) so beschaffen ist, dass wenn man auf den einen Querschnitt (75) sieht, eine Länge entlang einer sich erstreckenden Richtung der zweiten Achse (P) länger ist als eine Länge entlang einer Richtung orthogonal zur zweiten Achse (P).
- Glühkerze (1) nach Anspruch 1 oder 2, wobei:Der zentrale Schaft (3) ferner umfassteinen hinteren Rumpfabschnitt (37), der an einer solchen Position in Bezug auf die Längsrichtung der ersten Achse (O) der metallischen Hülle (4) angeordnet ist, dass er dem hinteren Endabschnitt der inneren Umfangsfläche der axialen Bohrung (43) zugewandt ist, und der einen größeren Durchmesser als der des anderen Endabschnitts (36) aufweist, undeinen Schulterabschnitt (38), der den hinteren Rumpfabschnitt (37) und den anderen Endabschnitt (36) in sich verjüngender Weise verbindet;die metallische Hülle (4) ferner einen Kegelabschnitt (47) umfasst, der sich am hinteren Endabschnitt der axialen Bohrung (43) von einer Position, die vor einem vorderen Ende des Schulterabschnitts (38) angeordnet ist, in Richtung des hinteren Endes (48), das rückwärts von der Position in Bezug auf die Längsrichtung der ersten Achse (O) angeordnet ist, verjüngt; unddas Kontaktelement (7) so angeordnet ist, dass das zweite Kontursegment (71) mit dem zentralen Schaft (3) in Kontakt steht und dass das erste Kontursegment (72) mit einer inneren Umfangsfläche der vor dem Kegelabschnitt angeordneten axialen Bohrung (43) in Kontakt steht.
- Glühkerze (1) nach Anspruch 3, wobei die Kontur (70) des Kontaktelements (7) ferner ein drittes Kontursegment (73) umfasst, das an einem Ende mit dem zweiten Kontursegment (71) verbunden ist; das sich von einem Ende zum anderen Ende hin radial nach außen erstreckt und sich entlang der zweiten Achse (P) erstreckt; und das am anderen Ende mit dem ersten Kontursegment (72) verbunden ist; und dessen Verbindungspunkt mit dem ersten Kontursegment (72) ein Ende des Kontaktelements (7) in Bezug auf die Erstreckungsrichtung der zweiten Achse (P) ist.
- Glühkerze (1) nach Anspruch 4, wobei die Kontur (70) ein Spiegelbild in Bezug auf eine zentrale Position (A-A) in Längsrichtung der zweiten Achse (P) bildet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011013388 | 2011-01-25 | ||
PCT/JP2012/050708 WO2012102109A1 (ja) | 2011-01-25 | 2012-01-16 | グロープラグ |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2669578A1 EP2669578A1 (de) | 2013-12-04 |
EP2669578A4 EP2669578A4 (de) | 2018-01-03 |
EP2669578B1 true EP2669578B1 (de) | 2019-08-14 |
Family
ID=46580681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12739873.3A Active EP2669578B1 (de) | 2011-01-25 | 2012-01-16 | Glühkerze |
Country Status (5)
Country | Link |
---|---|
US (1) | US20130248508A1 (de) |
EP (1) | EP2669578B1 (de) |
JP (1) | JP5806211B2 (de) |
KR (1) | KR101638670B1 (de) |
WO (1) | WO2012102109A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9574774B2 (en) * | 2014-03-27 | 2017-02-21 | Kyocera Corporation | Heater and ignition apparatus equipped with the heater |
US10253982B2 (en) * | 2014-12-22 | 2019-04-09 | Ngk Spark Plug Co., Ltd. | Glow plug with pressure sensor |
DE102016114929B4 (de) * | 2016-08-11 | 2018-05-09 | Borgwarner Ludwigsburg Gmbh | Druckmessglühkerze |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0484863U (de) * | 1990-11-29 | 1992-07-23 | ||
EP0989370A3 (de) * | 1998-09-25 | 2005-04-20 | Delphi Technologies, Inc. | Metallspitze für Glühsensor |
DE10012266A1 (de) * | 2000-03-14 | 2001-09-20 | Bosch Gmbh Robert | Glühstiftkerze für eine Brennkraftmaschine |
JP2002013736A (ja) * | 2000-06-27 | 2002-01-18 | Denso Corp | グロープラグ |
JP2006112478A (ja) * | 2004-10-13 | 2006-04-27 | Nok Corp | 往復動用密封リング |
JP4960118B2 (ja) * | 2006-03-30 | 2012-06-27 | 日本特殊陶業株式会社 | グロープラグ |
DE102007015491A1 (de) * | 2006-03-30 | 2007-10-04 | NGK Spark Plug Co., Ltd., Nagoya | Glühkerze |
JP4897467B2 (ja) * | 2006-12-19 | 2012-03-14 | 日本特殊陶業株式会社 | グロープラグおよびその製造方法 |
JP5964547B2 (ja) * | 2011-01-25 | 2016-08-03 | 日本特殊陶業株式会社 | グロープラグおよびその製造方法 |
-
2012
- 2012-01-16 WO PCT/JP2012/050708 patent/WO2012102109A1/ja active Application Filing
- 2012-01-16 US US13/991,369 patent/US20130248508A1/en not_active Abandoned
- 2012-01-16 EP EP12739873.3A patent/EP2669578B1/de active Active
- 2012-01-16 JP JP2012515276A patent/JP5806211B2/ja active Active
- 2012-01-16 KR KR1020137020826A patent/KR101638670B1/ko active IP Right Grant
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
KR101638670B1 (ko) | 2016-07-11 |
JPWO2012102109A1 (ja) | 2014-06-30 |
EP2669578A4 (de) | 2018-01-03 |
WO2012102109A1 (ja) | 2012-08-02 |
US20130248508A1 (en) | 2013-09-26 |
EP2669578A1 (de) | 2013-12-04 |
KR20140037817A (ko) | 2014-03-27 |
JP5806211B2 (ja) | 2015-11-10 |
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