EP2927590A1 - Glühkerze für keramisches heizelement und verfahren zur herstellung davon - Google Patents

Glühkerze für keramisches heizelement und verfahren zur herstellung davon Download PDF

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Publication number
EP2927590A1
EP2927590A1 EP13858638.3A EP13858638A EP2927590A1 EP 2927590 A1 EP2927590 A1 EP 2927590A1 EP 13858638 A EP13858638 A EP 13858638A EP 2927590 A1 EP2927590 A1 EP 2927590A1
Authority
EP
European Patent Office
Prior art keywords
ceramic heater
outer cylinder
section
metal outer
glow plug
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.)
Withdrawn
Application number
EP13858638.3A
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English (en)
French (fr)
Other versions
EP2927590A4 (de
Inventor
Katsumi Takatsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Corp
Original Assignee
Bosch Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bosch Corp filed Critical Bosch Corp
Publication of EP2927590A1 publication Critical patent/EP2927590A1/de
Publication of EP2927590A4 publication Critical patent/EP2927590A4/de
Withdrawn legal-status Critical Current

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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
    • 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
    • F23Q2007/004—Manufacturing or assembling methods

Definitions

  • the present invention relates to a ceramic heater type glow plug used for start aid of a diesel engine and a manufacturing method thereof. More particularly, the present invention relates to a ceramic heater type glow plug with a structure in which a ceramic heater is fixed to a metal outer cylinder by brazing and a manufacturing method thereof.
  • a ceramic heater type glow plug used for start aid of a diesel engine generally has a structure in which the rear end side is bonded with the inside of the metal outer cylinder by brazing in a state in which a heating section on the front end side of a ceramic heater projects outward.
  • the rear end side of the metal outer cylinder fixed by being inserted into the front end of the cylindrical housing, which is a fitting for installation in the cylinder head of an engine.
  • brazing material is disposed in the vicinity of the bonded section between the ceramic heater and the metal outer cylinder and the brazing material is heated to the melting temperature or higher so that the brazing material flows into the gap of the bonded section for bonding due to surface tension.
  • the wettability of the brazing material relative to the material of the bonded section is important and, when the contact angle is large, the brazing material does not easily flow into the gap of the bonded section. Therefore, the technique for applying alloy plating 118d to the surface of a metal outer cylinder 118 has been disclosed (see PTL 1).
  • the contact angle of the brazing material becomes substantially zero, significantly increasing the flowability of the brazing material on the surface of the alloy plating 118d surface.
  • processing such as heating is performed with brazing material placed in the metal outer cylinder 118.
  • the alloy plating 118d applied to the surface of the metal outer cylinder 118 only needs to be present in a position where the brazing material is placed and in the bonded section (brazed section) 119. However, when the plating is applied to such a limited area, masking needs to be applied to the surface of the metal outer cylinder 118 and this may increase the production cost.
  • the brazing material is likely to move to an area not related to bonding.
  • the amount of brazing material for example, three to ten times as much as the volume of the gap needs to be disposed in the metal outer cylinder 118 and the amount of relatively-expensive brazing material consumed increases, possibly increasing the production cost of the glow plug.
  • an object is to provide a ceramic heater type glow plug in which as little brazing material as possible may be supplied efficiently to a bonded section by preventing the brazing material from entering portions other than a bonded section as much as possible when a ceramic heater and a metal outer cylinder are bonded together by brazing, and a manufacturing method thereof.
  • a method for manufacturing a ceramic heater type glow plug including a ceramic heater and a metal outer cylinder having one end holding the ceramic heater and another end fixed by being inserted into an internal hole of a housing, the method including the steps of forming a first metallization section so as to cover an electrode exposed on an outer peripheral portion in circumferential direction of the ceramic heater and forming a second metallization section for improving surface wettability in a position corresponding to a front end of the metal outer cylinder closer to a front end side than the first metallization section, forming a metal layer removed section by providing a metal layer at least on an inner peripheral surface of the metal outer cylinder and removing the metal layer formed at the front end of the metal outer cylinder, inserting a rear end of the ceramic heater into one end side of the metal outer cylinder and disposing brazing material at an entrance of a gap between the ceramic heater and the metal outer cylinder, heating the ceramic heater and the metal outer cylinder so as to melt and pass the brazing material through the gap, and
  • the metal layer removed section is formed at the front end of the metal outer cylinder and the first metallization section used as a bonded portion covering the electrode and the second metallization section used to pass the brazing material through the gap between the ceramic heater and the metal outer cylinder are formed as metallization sections provided in the outer peripheral portion of the ceramic heater, so that the brazing material does not easily enter portions other than the gap and the brazing material can efficiently flow into the gap.
  • the area in which the brazing material spreads can be reduced, enabling reduction in the amount of brazing material used. Accordingly, an increase in the production cost of the ceramic heater type glow plug can be suppressed.
  • the bonded area between the ceramic heater and the metal outer cylinder is reduced, enabling reduction in the thermal stress generated in the bonded section between the ceramic heater and the metal outer cylinder.
  • the ceramic heater and the metal outer cylinder are preferably disposed with the front end sides facing upward and the brazing material is preferably placed at the front end of the metal outer cylinder and then melted.
  • the metal layer removed section at the front end of the metal outer cylinder prevents the brazing material from entering the outer peripheral surface side of the metal outer cylinder and the second metallization section efficiently passes the brazing material through the bonded section between the ceramic heater and the metal outer cylinder.
  • the surface area of the second metallization section is preferably smaller than the surface area of the first metallization section.
  • one or both of the first metallization section and the second metallization section are preferably formed by being divided into a plurality of portions.
  • the length in the ceramic heater axial direction of each of the plurality of portions generated by dividing the second metallization section is preferably larger than the length in the circumferential direction.
  • the metal layer on the inner peripheral surface of the metal outer cylinder is preferably formed in a region from the front end of the metal outer cylinder to a position corresponding to an end on a rear end side of the first metallization section formed on the ceramic heater.
  • the metal layer formed in this way prevents the brazing material from flowing into the region at the back of the metal outer cylinder not contributing to bonding, thereby reducing the amount of the brazing material used.
  • a ceramic heater type glow plug including a ceramic heater and a metal outer cylinder having one end holding the ceramic heater and another end fixed by being inserted into an internal hole of a housing, in which the ceramic heater has one electrode in an outer peripheral portion in a circumferential direction and a first metallization section so as to cover the one electrode, the metal outer cylinder has a metal layer formed at least on an inner peripheral surface and a metal layer removed section formed at a front end, the ceramic heater and the metal outer cylinder are bonded together by brazing in regions in which the first metallization section and the metal layer have been formed, and a second metallization section for improving surface wettability is formed in a position corresponding to the front end of the metal outer cylinder closer to a front end side than the first metallization section of the ceramic heater.
  • the ceramic heater type glow plug according to the invention includes the metal layer removed section at the front end of the metal outer cylinder and, as metallization sections provided in the outer peripheral portion of the ceramic heater, the first metallization section that is a bonded portion covering the electrode and the second metallization section that passes the brazing material through the gap between the ceramic heater and the metal outer cylinder, so that the amount of the brazing material used can be reduced and an increase in the production cost can be suppressed.
  • the bonded area between the ceramic heater and the metal outer cylinder is reduced, enabling reduction in the thermal stress generated in the bonded section between the ceramic heater and the metal outer cylinder.
  • Fig. 1 is a cross-sectional view showing a cross section including an axis of a diesel engine glow plug 10 according to a first embodiment of the invention.
  • the glow plug 10 shown in Fig. 1 is configured as a ceramic heater type glow plug including a ceramic heater assembly 20.
  • the ceramic heater assembly 20 includes a ceramic heater 21, a metal outer cylinder (sheathe) 25, a large diameter lead section 40, and so on as main components.
  • Fig. 1 the ceramic heater 21, the large diameter lead section 40, an external connection terminal 15, and so on are shown in a side view not in a cross-sectional view.
  • the ceramic heater 21 has a U-shaped ceramic heating element 37 embedded in a ceramic insulation base 39 that configures the main unit.
  • a positive electrode 31 and a negative electrode 33 are provided at both ends of the ceramic heating element 37, respectively, via metal leads 35.
  • the negative electrode 33 is drawn out onto the outer peripheral surface of the ceramic insulation base 39 and, on the outer peripheral surface of the ceramic insulation base 39 including the negative electrode 33, the first metallization section (negative electrode side metallization section) 24a is formed.
  • the first metallization section 24 is bonded with the internal surface of the metal outer cylinder 25 by brazing and the negative electrode 33 is electrically connected to the metal outer cylinder 25.
  • the positive electrode 31 is drawn out onto the outer surface of the ceramic insulation base 39 at the rear end opposite to the front end side in which the ceramic heating element 37 is embedded.
  • the rear end surface of the ceramic insulation base 39 including the positive electrode 31 is bonded with the front end surface of the large diameter lead section 40 by brazing using brazing material 23 to electrically connect the positive electrode 31 with the large diameter lead section 40.
  • the ceramic heater assembly 20 configured in this way is press-inserted into a cylindrical housing 11, which is a fitting for installation in the cylinder head of an engine (not shown), and fixed by brazing or the like.
  • the metal outer cylinder 25 is fixed in the housing 11 by brazing or the like.
  • the metal outer cylinder 25 may be fixed in a metal tube or the like by brazing or the like and the metal tube may be welded with a member included in the main body of the housing to integrally form the housing 11.
  • the rear end surface of the large diameter lead section 40 is electrically connected with a front end surface of the external connection terminal 15 by being bonded through welding or the like.
  • the external connection terminal 15 is held by an insulator 12 at the rear end of the housing 11, and the rear end is exposed to the outside of the housing 11 and connected to a round pin 14.
  • the large diameter lead section 40 included in the glow plug 10 is defined as a lead bar having a relatively large diameter and a sectional area, which is, for example, 20% or more of the cross sectional area of the ceramic insulation base 39. Since the temperature is high and a large current (for example, 4 to 30 amperes) flows through the large diameter lead section 40 during operation of the glow plug 10, if the diameter of the large diameter lead section 40 is too small for example, less than 1 mm, in addition, self heating occurs, therefore, oxidation may occur in a short time.
  • a large current for example, 4 to 30 amperes
  • the cross sectional area of the large diameter lead section 40 is 20% or more of the cross sectional area of the ceramic insulation base 39, the area of the bonded section between the rear end surface of the ceramic heater 21 and the front end surface of the large diameter lead section 40 becomes large, thereby securing the bonding strength. That is, it is possible to obtain the bonding strength that bears vibrations caused during installation in the engine or the like of a vehicle or a stress applied during manufacturing of the glow plug 10.
  • the cross sectional area of the large diameter lead section 40 is, for example, preferably 70% or less of the cross sectional area of the ceramic insulation base 39.
  • the cross sectional area of the large diameter lead section 40 is more preferably 50% or less, and still more preferably 40% or less of the cross sectional area of the ceramic insulation base 39.
  • the large diameter lead section 40 is preferably made of a material with a lower stiffness than a lead bar as the external connection terminal 15.
  • a material for example, copper (Cu), aluminum (Al), or alloy of these materials can be used. Alternatively, iron alloy or cast iron with low stiffness can also be used.
  • the large diameter lead section 40 is bent to prevent the bending stress from concentrating on the bonded section.
  • the length of the large diameter lead section 40 is preferably increased to twice or more of the diameter.
  • the resistance of the large diameter lead section 40 can be reduced in such a large diameter lead section 40, even when the temperature is high and a large current flows, self heating can be suppressed and deterioration due to oxidation can be prevented for a long period of time.
  • application of nickel (Ni) plating or the like to the large diameter lead section 40 further improves the heat resistance.
  • an increasing in the thermal conductivity of the large diameter lead section 40 efficiently transfers the heat transferred from a ceramic heater 21 to the external connection terminal 15, thereby improving the heat resistance of the large diameter lead section 40.
  • the external connection terminal 15 is fixed in the housing 11 by filling the gap between the external connection terminal 15 and the housing 11 with a filler 17 including resin, low-melting glass, or the like. Accordingly, when a connector (not shown) is inserted or screwed onto the round pin 14, a stress added to the external connection terminal 15 is not applied to the bonded section between the external connection terminal 15 and the large diameter lead section 40, thereby preventing the bonded section from being broken.
  • the ceramic heater 21 can be shortened and the step of filling the metal outer cylinder 25 with powder and the step of reducing the diameter of the metal outer cylinder 25 can be omitted, thereby simplifying the manufacturing process. Since the glow plug 10 according to the embodiment fixes the metal outer cylinder 25 to the inside of the housing 11 using brazing instead of press-insertion, this step can also be simplified. In addition, structural members such as the external connection terminal 15, the large diameter lead section 40, and the metal outer cylinder 25 are simplified without having complicated shapes or structures, so the production cost can be reduced.
  • Fig. 2 is a cross-sectional view showing a cross section including an axis of the ceramic heater assembly 20 included in the glow plug 10 according to the embodiment.
  • the ceramic heater 21 and the large diameter lead section 40 are shown in a side view not in a cross-sectional view.
  • a metal layer 26 is provided on the inner peripheral surface and the outer peripheral surface of the metal outer cylinder 25.
  • a metal layer removed section 26a not having the metal layer 26 is formed at the front end of the metal outer cylinder 25.
  • This metal layer 26 is formed by applying, for example, Ni-B (nickel-boron) alloy plating.
  • Ni-B nickel-boron
  • the brazing material is brazing silver
  • the contact angle of brazing silver relative to Ni-B alloy plating is substantially zero, the metal layer 26 becomes optimum.
  • the material can be advantageously used.
  • a second metallization section 24b as well as the first metallization section (metallization section on the negative electrode side) 24a is provided on the outer peripheral surface in the radial direction of the ceramic heater 21.
  • These metallization sections are formed by, for example, silver-copper (Ag-Cu) brazing material including titanium (Ti).
  • the first metallization section 24a and the second metallization section 24b are provided to bond the outer peripheral surface of the ceramic heater 21 with the inner peripheral surface of the metal outer cylinder 25 using a brazing material 27.
  • the negative electrode 33 and the metal outer cylinder 25 are electrically connected together via the first metallization section 24a.
  • the second metallization section 24b is used to bond the ceramic heater 21 with the metal outer cylinder 25 and has a main function of causing the brazing material 27 to efficiently flow into the gap, which becomes a bonded portion, when bonding the ceramic heater 21 with the metal outer cylinder 25 by improving the wettability of the surface of the ceramic heater 21. Since the above metal layer removed section 26a is provided at the front end of the metal outer cylinder 25 at this time, the brazing material 27 does not easily enter the outer peripheral surface side of the metal outer cylinder 25.
  • the first metallization section 24a and the second metallization section 24b are formed as one integrated metallization section without being separated, the amount of expensive material used to form the metallization section increases.
  • a difference in the thermal expansion coefficient between the material of the metallization section and the ceramic heater 21 and the metal outer cylinder 25 generates an excess thermal stress on the surface of the ceramic insulation base 39 and breakage of the surface of the ceramic insulation base 39 may occur due to repetition of a high temperature state and a room temperature state. Accordingly, the first metallization section 24a is formed separately from the second metallization section 24b.
  • the surface area of the second metallization section 24b is smaller than the surface area of the first metallization section 24a. Accordingly, since the brazing material 27 does not need to be present sufficiently in the second metallization section 24b, which does not contribute to an electric connection between the negative electrode 33 and the metal outer cylinder 25, the amount of the brazing material 27 used can be reduced, thereby contributing to reduction in the production cost.
  • Fig. 3 shows the ceramic heater assembly 20 used in a modification of the glow plug according to the embodiment.
  • a metal layer removed section 26b is provided not only in the metal layer removed section 26a at the front end of the metal outer cylinder 25, but also on the inner peripheral surface of the metal outer cylinder 25.
  • This metal layer removed section 26b is provided in a position closer the rear end than a region corresponding to the first metallization section 24a to prevent the brazing material 27 from flowing into a region not used for bonding with the first metallization section 24a.
  • This metal layer removed section 26a also reduces the amount of the brazing material 27 used.
  • the first metallization section 24a and the second metallization section 24b are formed on the outer peripheral surface in the radial direction of the ceramic heater 21 using silver-copper (Ag-Cu) brazing material including, for example, titanium (Ti).
  • the first metallization section 24a is formed in a position corresponding to the position where the negative electrode 33 is provided.
  • the second metallization section 24b is formed in a position corresponding to the position of the front end of the metal outer cylinder during assembly to the metal outer cylinder.
  • the large diameter lead section 40 is bonded with the rear end surface of the ceramic heater 21 on which the positive electrode 31 is exposed, using the brazing material 27.
  • the metal layer 26 is formed on the entire inner peripheral surface and the entire outer peripheral surface of the metal outer cylinder 25 using the nickel-boron (Ni-B) plating, and then the metal layer removed sections 26a and 26b are formed as shown in Fig. 5(c) by mechanically removing a part of the metal layer 26.
  • the metal layer removed section 26a is formed by removing the metal layer at the front end of the metal outer cylinder 25 and the metal layer removed section 26b is formed by removing the metal layer located in a region closer to the rear end side than the first metallization section 24a provided on the outer peripheral surface of the ceramic heater 21 during assembly of the ceramic heater 21.
  • brazing material 27a such as silver brazing material is disposed at the entrance of the gap between the outer peripheral surface of the ceramic heater 21 and the inner peripheral surface of the metal outer cylinder 25.
  • the brazing material since the large diameter lead section 40 is used as an electrode draw-out lead that draws out the positive electrode 33 of the ceramic heater 21, the brazing material cannot be disposed in the metal outer cylinder 25. Accordingly, the brazing material is disposed at the entrance of the gap.
  • the brazing material 27a is heated and melted so as to flow into the gap between the outer peripheral surface of the ceramic heater 21 and the inner peripheral surface of the metal outer cylinder 25. Since the metal layer removed section 26a is provided at the front end of the metal outer cylinder 25, the brazing material 27a does not easily flow onto the outer peripheral surface side of the metal outer cylinder 25. In addition, since the second metallization section 24b for improving the surface wettability is formed on the outer peripheral surface of the ceramic heater 21 corresponding to the front end of the metal outer cylinder 25, the brazing material 27a efficiently flows into the gap.
  • the brazing material 27a flows in a state in which the ceramic heater 21 and the metal outer cylinder 25 are held with their front end sides facing upward, the brazing material 27a easily reaches the region of the first metallization section 24a, thereby facilitating reduction in the amount of the brazing material 27a used.
  • the metal layer removed section 26b is also provided in a portion closer to the rear end side than the region in which the first metallization section 24a has been provided, in the metal layer 26 formed on the inner peripheral surface of the metal outer cylinder 25. Accordingly, the brazing material 27a is prevented from flowing into the region not contributing to bonding.
  • the ceramic heater 21 is bonded with the metal outer cylinder 25 as shown in Fig. 7(b) and the ceramic heater assembly 20 is obtained.
  • the ceramic heater type glow plug 10 shown in Fig. 1 can be manufactured through a step for, for example, bonding the ceramic heater assembly 20 with the inside of the housing 11 and making an electric connection of the external connection terminal 15.
  • the ceramic heater type glow plug 10 and the manufacturing method thereof by forming the metal layer removed section 26a at the front end of the metal outer cylinder 25 and forming, as metallization sections provided in the outer peripheral portion of the ceramic heater 21, the first metallization section 24a used as a bonded portion covering the negative electrode 33 and the second metallization section 24b used to pass the brazing material 27 through the gap between the ceramic heater 21 and the metal outer cylinder 25, the brazing material 27 does not easily enter portions other than the gap and the brazing material 27 can efficiency flow into the gap. Accordingly, the amount of the brazing material 27 used can be reduced.
  • the first metallization section 24a is formed separately from the second metallization section 24b in the glow plug 10 and the manufacturing method thereof according to the embodiment, the area of the bonded section contributing to the electric connection of the negative electrode 33 and the metal outer cylinder 25 can be reduced as compared with the case in which one metallization section is formed in a wide range, and the amount of the brazing material 27 used can be easily reduced. The amount of material of the metallization sections 24a and 24b can also be reduced. Accordingly, an increase in the production cost of the ceramic heater type glow plug 10 can be suppressed.
  • the bonded area by the metallization sections is reduced, thereby preventing breakage caused by repetition of a high temperature and a room temperature when an excess thermal stress is generated on the surface of the ceramic insulation base 39 due to a difference in the thermal expansion coefficient between the metallization sections and the ceramic insulation base 39 and the metal outer cylinder 25.
  • the ceramic heater 21 and the metal outer cylinder 25 are disposed with their front end sides facing upward and the brazing material 27a is placed at the front end of the metal outer cylinder 25 and then melted.
  • the metal layer removed section 26a at the front end of the metal outer cylinder 25 prevents the brazing material from entering the outer peripheral surface side of the metal outer cylinder 25 and the second metallization section 24b efficiently passes the brazing material 27a through the bonded section between the ceramic heater 21 and the metal outer cylinder 25.
  • the surface area of the second metallization section 24b is smaller than the surface area of the first metallization section 24a.
  • the metal layer 26 on the inner peripheral surface of the metal outer cylinder 25 is provided in a region from the front end of the metal outer cylinder 25 to a position corresponding to the end of the rear end side of the first metallization section 24a formed on the ceramic heater 21. Forming of the metal layer 26 in this way prevents the brazing material 27 from flowing into the region at the back of the metal outer cylinder 25 not contributing to bonding.
  • a glow plug and a manufacturing method thereof according to a second embodiment of the invention is different from the glow plug according to the first embodiment in that at least one of the first metallization section 24a and the second metallization section 24b is formed by being divided into a plurality of portions.
  • Figs. 8(a) and (b) are cross-sectional views showing cross sections including axes of ceramic heater assemblies 20A and 20B of the glow plug according to the embodiment.
  • the second metallization section 24b is divided into a plurality of portions 24ba and 24bb.
  • the first metallization section 24a is divided into a plurality of portions 24aa and 24ab.
  • both the first metallization section 24a and the second metallization section 24b may be divided into a plurality of portions.
  • the glow plug and the manufacturing method thereof according to the embodiment have the effect of further reducing the bonded area between the ceramic heater 21 and the metal outer cylinder 25 so as to reduce the thermal stress generated in their bonded sections, in addition to the effect described in the first embodiment. As a result, breakage of the surface of the ceramic heater 21 can be further reduced.
  • a glow plug and a manufacturing method thereof according to a third embodiment of the invention is different from the glow plugs according to the first embodiment and the second embodiment in that, when the second metallization section 24b is divided into a plurality of portions, the length in the ceramic heater 21 axial direction of each of the divided portions is longer than the length in the circumferential direction.
  • Fig. 9 is a cross-sectional view showing a cross section including an axis of a ceramic heater assembly 20C of the glow plug according to the embodiment.
  • the length in the ceramic heater 21 axial direction (X-direction) of each of the divided portions 24ba, 24bb, and 24bc of the second metallization section 24b is larger than the length in the circumferential direction (Y-direction). Accordingly, when the brazing material 27 is melted and flows into the gap between the ceramic heater 21 and the metal outer cylinder 25, the brazing material 27 can be efficiently moved to the bonded portion of the first metallization section 24a.
  • the glow plug and the manufacturing method thereof according to the third embodiment have the effect of causing the brazing material 27 to efficiently flow onto the first metallization section 24a so as to improve the reliability of an electric connection between the negative electrode 33 of the ceramic heater 21 and the metal outer cylinder 25, in addition to the effects described in the first and second embodiments.
  • the above glow plug according to the embodiments of the invention indicates an aspect of the invention and does not limit the invention and the embodiments may be arbitrarily changed within the scope of the invention.
  • the ceramic heater assembly 20 using the large diameter lead section 40 as an electrode draw-out member drawing out the positive electrode 31 of the ceramic heater 21 to the outside of the metal outer cylinder 25 is adopted, but the invention is not limited to such a structure.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
EP13858638.3A 2012-11-29 2013-09-12 Glühkerze für keramisches heizelement und verfahren zur herstellung davon Withdrawn EP2927590A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012260603 2012-11-29
PCT/JP2013/074635 WO2014083913A1 (ja) 2012-11-29 2013-09-12 セラミックスヒータ型グロープラグ及びその製造方法

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EP2927590A1 true EP2927590A1 (de) 2015-10-07
EP2927590A4 EP2927590A4 (de) 2016-08-17

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EP (1) EP2927590A4 (de)
JP (1) JP6005175B2 (de)
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE102016121467B4 (de) 2015-11-11 2018-09-20 Denso Corporation Keramikheizer

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JP6265570B2 (ja) * 2014-04-24 2018-01-24 ボッシュ株式会社 セラミックスヒータ型グロープラグの製造方法及びセラミックスヒータ型グロープラグ
JP6395239B2 (ja) * 2015-03-23 2018-09-26 ボッシュ株式会社 セラミックスヒータ型グロープラグ
JP2019124367A (ja) * 2018-01-11 2019-07-25 株式会社デンソー グロープラグ
JP7313268B2 (ja) * 2019-12-20 2023-07-24 ボッシュ株式会社 グロープラグ

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JPH07233944A (ja) * 1994-02-25 1995-09-05 Ngk Spark Plug Co Ltd 発熱素子
US6727473B2 (en) * 2001-03-09 2004-04-27 Ngk Spark Plug Co., Ltd. Ceramic heater device and method for manufacturing the device
JP4632565B2 (ja) * 2001-03-09 2011-02-16 日本特殊陶業株式会社 セラミックヒーター装置及びその製造方法
JP2005315447A (ja) * 2004-04-27 2005-11-10 Kyocera Corp セラミックヒーターおよびグロープラグ
US8324535B2 (en) * 2005-07-26 2012-12-04 Kyocera Corporation Brazing structure, ceramic heater, and glow plug
JP5645529B2 (ja) * 2010-07-29 2014-12-24 京セラ株式会社 セラミックヒータおよびこれを備えたグロープラグ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016121467B4 (de) 2015-11-11 2018-09-20 Denso Corporation Keramikheizer

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WO2014083913A1 (ja) 2014-06-05
EP2927590A4 (de) 2016-08-17
JP6005175B2 (ja) 2016-10-12
JPWO2014083913A1 (ja) 2017-01-05

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