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WO2014083913A1 - Bougie de préchauffage d'élément chauffant en céramique et son procédé de fabrication - Google Patents

Bougie de préchauffage d'élément chauffant en céramique et son procédé de fabrication Download PDF

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Publication number
WO2014083913A1
WO2014083913A1 PCT/JP2013/074635 JP2013074635W WO2014083913A1 WO 2014083913 A1 WO2014083913 A1 WO 2014083913A1 JP 2013074635 W JP2013074635 W JP 2013074635W WO 2014083913 A1 WO2014083913 A1 WO 2014083913A1
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WO
WIPO (PCT)
Prior art keywords
ceramic heater
outer cylinder
metal outer
glow plug
metallized
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.)
Ceased
Application number
PCT/JP2013/074635
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English (en)
Japanese (ja)
Inventor
勝美 高津
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
Priority to EP13858638.3A priority Critical patent/EP2927590A4/fr
Priority to JP2014550061A priority patent/JP6005175B2/ja
Publication of WO2014083913A1 publication Critical patent/WO2014083913A1/fr
Anticipated expiration legal-status Critical
Ceased 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 as a starting aid for a diesel engine and a method for manufacturing the same.
  • the present invention relates to a ceramic heater type glow plug having a structure in which a ceramic heater is fixed to a metal outer cylinder by brazing and a manufacturing method thereof.
  • Ceramic heater type glow plugs used for diesel engine start-up assistance are generally joined to a metal outer cylinder by brazing the rear end side with the heat generation part on the front end side of the ceramic heater protruding outside. It has a structure.
  • the rear end side of the metal outer cylinder is inserted and fixed into the front end portion of a cylindrical housing which is a fitting for mounting on the cylinder head of the engine.
  • a brazing material is disposed in the vicinity of the joint between the ceramic heater and the metal outer cylinder, the brazing material is heated above the melting temperature, and the brazing material is poured into the gap between the joints by surface tension. Join.
  • the wettability of the brazing material with respect to the material of the joint is important, and if the contact angle is large, the brazing material is difficult to flow into the gap of the joint. Therefore, it is disclosed that an alloy plating 118d is applied to the surface of the metal outer cylinder 118 (see Patent Document 1).
  • the contact angle of the brazing material is almost zero by performing the alloy plating 118d treatment on the surface of the metal outer cylinder 118 as in the method of manufacturing the glow plug of Patent Document 1, the brazing material on the surface of the alloy plating 118d is almost zero.
  • the fluidity of is extremely high.
  • a brazing material is placed inside the metal outer cylinder 118 and heat treatment or the like is performed.
  • the alloy plating 118d applied to the surface of the metal outer cylinder 118 is sufficient if it exists only in the position where the brazing material is placed and the joint (brazing portion) 119.
  • the plating peeling portion 118a is formed to prevent the brazing material from flowing to the outer peripheral surface 118b side of the metal outer cylinder 118.
  • the brazing material is an area unrelated to bonding. It becomes easy to move to.
  • a brazing material having a capacity of, for example, 3 to 10 times the volume of the gap In order to uniformly fill the brazing material between the surface of the ceramic heater 130 and the corresponding inner peripheral surface 118c of the metal outer cylinder 118, a brazing material having a capacity of, for example, 3 to 10 times the volume of the gap. The material has to be disposed inside the metal outer cylinder 118, and the consumption of the relatively expensive brazing material increases, which may lead to an increase in the manufacturing cost of the glow plug.
  • An object of the present invention is to provide a ceramic heater type glow plug that can be used and a method for manufacturing the same.
  • the outer circumference in the circumferential direction of the ceramic heater Forming a first metallized portion so as to cover the electrode exposed to the portion, and improving surface wettability at a position corresponding to the distal end portion of the metal outer cylinder on the distal end side with respect to the first metallized portion.
  • a ceramic heater type glow plug manufacturing method characterized by including a bonding step, and the above-described problems can be solved.
  • the metal layer peeling portion is formed at the tip portion of the metal outer cylinder, and the joint portion covering the electrode as the metallized portion provided on the outer peripheral portion of the ceramic heater.
  • the ceramic heater and the metal outer cylinder are arranged with their tip ends facing upward. It is preferable that the brazing material is placed on the tip of the metal outer cylinder and melted.
  • the metal layer peeling portion at the tip of the metallic outer cylinder prevents the brazing material from wrapping around the outer peripheral surface side of the metallic outer cylinder, and the second metallized portion.
  • the brazing material can be efficiently poured into the joint between the ceramic heater and the metal outer cylinder.
  • the surface area of the second metallized portion is smaller than the surface area of the first metallized portion.
  • the first metallized portion and / or the second metallized portion are divided into a plurality of sections.
  • the bonding area of the ceramic heater and the metal outer cylinder is further reduced, and the thermal stress generated at each bonded portion is further reduced. Can do.
  • the axial length of the ceramic heater in each of the second metallized parts divided into the plurality of sections is determined from the circumferential length. It is preferable to lengthen the length.
  • the metal layer on the inner peripheral surface of the metal outer cylinder is formed on the ceramic heater from the tip of the metal outer cylinder. It is preferable to provide in the area
  • a ceramic heater comprising: a ceramic heater; and a metal outer cylinder in which the ceramic heater is held on one end side and the other end side is inserted and fixed in an internal hole of the housing.
  • the ceramic heater has one electrode on a circumferential outer peripheral portion and a first metallized portion so as to cover the one electrode, and at least an inner peripheral surface of the metal outer cylinder Is provided with a metal layer peeling portion at the tip of the metal outer cylinder, and the ceramic metal heater and the metal outer cylinder are formed with the first metallized portion and the metal layer, respectively.
  • the tip of the metal outer cylinder that is joined by brazing in the formed region and that is more distal than the first metallized portion of the ceramic heater A position corresponding to a ceramic heater glow plug, characterized in that it comprises a second metallization for surface wettability improvement.
  • the metal layer peeling portion is provided at the front end portion of the metal outer cylinder, and the metallized portion provided on the outer peripheral portion of the ceramic heater serves as a joining portion that covers the electrode.
  • FIG. 1 is an axial sectional view of a glow plug according to a first embodiment of the present invention. It is an axial sectional view of the ceramic heater assembly of the glow plug according to the first embodiment. It is an axial sectional view of the modification of a ceramic heater assembly. It is a figure shown in order to demonstrate the manufacturing method of a ceramic heater assembly. It is a figure shown in order to demonstrate the manufacturing method of a ceramic heater assembly. It is a figure shown in order to demonstrate the manufacturing method of a ceramic heater assembly. It is a figure shown in order to demonstrate the manufacturing method of a ceramic heater assembly. It is a figure shown in order to demonstrate the manufacturing method of a ceramic heater assembly. It is an axial sectional view of a ceramic heater assembly of a glow plug according to a second embodiment. It is an axial sectional view of a ceramic heater assembly of a glow plug according to a third embodiment. It is a figure shown in order to demonstrate the structure of the ceramic heater assembly of the conventional glow plug.
  • FIG. 1 is an axial cross-sectional view of a glow plug 10 for a diesel engine according to a first embodiment of the present invention.
  • a 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 (sheath) 25, a large-diameter lead portion 40, and the like as main components.
  • the ceramic heater 21, the large-diameter lead portion 40, the external connection terminal 15, and the like are shown as side views instead of sectional views.
  • the ceramic heater 21 has a U-shaped ceramic heating element 37 embedded in a ceramic insulating base 39 constituting the main body.
  • a positive electrode 31 and a negative electrode 33 are provided on both ends of the ceramic heating element 37 via metal leads 35, respectively.
  • the negative electrode 33 is taken out on the outer peripheral surface of the ceramic insulating base 39, and the first metallized portion (negative electrode side metalized portion) 24 a is formed on the outer peripheral surface of the ceramic insulating base 39 including the negative electrode 33. ing.
  • the first metallized portion 24 is joined to the inner 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 taken out to the outer surface of the ceramic insulating base 39 at the rear end portion opposite to the front end side where the ceramic heating element 37 is embedded.
  • the rear end surface of the ceramic insulating base 39 including the positive side electrode 31 is joined to the front end surface of the large diameter lead portion 40 by brazing using the brazing material 23, and the positive side electrode 31 and the large diameter lead portion 40 are electrically connected. It is connected to the.
  • the ceramic heater assembly 20 configured in this manner is press-fitted into a cylindrical housing 11 which is a mounting bracket to a cylinder head of an engine (not shown), and is fixed by brazing or the like.
  • the metal outer cylinder 25 is fixed to the inside of the housing 11 by brazing or the like, but the metal outer cylinder 25 is fixed to the inside of a metal pipe or the like by brazing or the like. It is also possible to form the housing 11 integrally by welding the members constituting the housing body.
  • the rear end surface of the large-diameter lead portion 40 is joined and electrically connected to the front end surface of the external connection terminal 15 by welding or the like.
  • the external connection terminal 15 is held by the insulator 12 at the rear end portion of the housing 11, and the rear end portion is exposed to the outside of the housing 11 and connected to the round pin 14.
  • the large-diameter lead portion 40 provided in the glow plug 10 of the present embodiment is, for example, a lead rod having a relatively large diameter having a cross-sectional area of 20% or more of the cross-sectional area of the ceramic insulating base 39. Defined.
  • a high temperature and a large current for example, 4 to 30 amperes
  • flow through the large diameter lead portion 40 if the diameter of the large diameter lead portion 40 is too small, for example, less than 1 mm, There is a risk of oxidation in a short time due to heat generation.
  • the cross-sectional area of the large-diameter lead portion 40 is 20% or more of the cross-sectional area of the ceramic insulating base 39, the area of the joint portion between the rear end surface of the ceramic heater 21 and the front end surface of the large-diameter lead portion 40. Can be ensured greatly, and the bonding strength can be ensured. That is, it is possible to obtain a bonding strength that can withstand vibrations that occur when used while being fixed to a vehicle engine or the like, and stress that is applied when the glow plug 10 is manufactured.
  • the cross-sectional area of the large-diameter lead portion 40 is preferably 70% or less of the cross-sectional area of the ceramic insulating base 39, for example.
  • the cross-sectional area of the large-diameter lead portion 40 is more preferably 50% or less, and further preferably 40% or less of the cross-sectional area of the ceramic insulating base 39.
  • the large-diameter lead portion 40 is made of a material having lower rigidity than the lead rod as the external connection terminal 15. Examples of such a material include copper (Cu), aluminum (Al), and alloys thereof. Alternatively, a low-rigidity iron alloy or cast iron can be used. If the large-diameter lead portion 40 having relatively small rigidity is used as described above, the ceramic heater 21 and the large-diameter lead portion 40 are caused by vibration applied when the engine is driven or stress applied to the periphery of each joint portion when the glow plug 10 is assembled. Even when a bending stress is generated at the joint portion, the large-diameter lead portion 40 bends and concentration of the bending stress at the joint portion can be avoided. Further, in order to avoid bending stress concentration, it is preferable that the length of the large-diameter lead portion 40 is not less than twice the diameter so that the large-diameter lead portion 40 is easily bent.
  • the resistance value of the large-diameter lead portion 40 can be reduced. Therefore, even when a high temperature and a large current flow, the self-heating is suppressed, and the long-term lead portion 40 can be used for a long time. Therefore, deterioration due to oxidation can be prevented. Further, by applying nickel (Ni) plating or the like to the large diameter lead portion 40, the heat resistance can be further improved. Furthermore, if the thermal conductivity of the large-diameter lead portion 40 is further increased, the heat transmitted from the ceramic heater 20 can be efficiently transmitted to the external connection terminal 15, and the heat resistance of the large-diameter lead portion 40 is further increased. Can be increased.
  • the external connection terminal 15 is filled with a filler 17 made of resin or low-melting glass between the external connection terminal 15 and the housing 11 in the housing 11. It is fixed by that. Therefore, when a connector (not shown) is inserted into the round pin 14 or screwed, stress applied to the external connection terminal 15 is applied to the joint between the external connection terminal 15 and the large-diameter lead portion 40. It is possible to prevent the joint from being broken without being applied. Further, stress may be generated in each part of the glow plug 10 due to vibration applied from the engine in a state where the glow plug 10 is attached to the engine. However, since the external connection terminal 15 is fixed by the filler 17.
  • the glow plug 10 having such a structure can shorten the ceramic heater 21 and omits the step of filling the metal outer cylinder 25 with powder and the step of reducing the diameter of the metal outer cylinder 25. And the manufacturing process can be simplified. In addition, since the glow plug 10 of the present embodiment fixes the metal outer cylinder 25 in the housing 11 by brazing rather than press-fitting, the process itself is also simplified. Furthermore, since the constituent members such as the external connection terminal 15, the large-diameter lead portion 40, and the metal outer cylinder 25 are not complicated shapes and structures but are simplified, the manufacturing cost can be reduced.
  • FIG. 2 is a sectional view in the axial direction of the ceramic heater assembly 20 provided in the glow plug 10 according to the present embodiment. It is shown as a diagram.
  • the metal layer 26 is provided on the inner peripheral surface and the outer peripheral surface of the metal outer cylinder 25.
  • the tip of the metal outer cylinder 25 is a metal layer peeling portion 26 a that does not have the metal layer 26.
  • the metal layer 26 is formed, for example, by applying Ni—B (nickel-boron) alloy plating.
  • Ni—B nickel-boron
  • the brazing material is silver brazing
  • the contact angle of the silver brazing with respect to the Ni—B alloy plating is almost zero, so that the optimum metal layer 26 is obtained.
  • a material other than Ni—B alloy plating can be suitably used as long as the material has high wettability with a brazing material such as silver brazing.
  • first metallized part (negative electrode side metallized part) 24a is provided on the radially outer peripheral surface of the ceramic heater 21.
  • These metallized portions are formed using, for example, a silver-copper (Ag—Cu) based brazing material containing titanium (Ti).
  • the first metallized portion 24 a and the second metallized portion 24 b are provided to join the outer peripheral surface of the ceramic heater 21 and the inner peripheral surface of the metal outer cylinder 25 with a brazing material 27.
  • the negative electrode 33 and the metal outer cylinder 25 are electrically connected through the first metallized portion 24a.
  • the second metallized portion 24 b is used for joining the ceramic heater 21 and the metal outer cylinder 25, but its main function is to improve the wettability of the surface of the ceramic heater 21.
  • the brazing material 27 is efficiently poured into the gap that becomes the joining portion.
  • the metal layer peeling portion 26 a described above is provided at the tip of the metal outer cylinder 25, so that the brazing material 27 is difficult to go around to the outer peripheral surface side of the metal outer cylinder 25.
  • the first metallized part 24a and the second metallized part 24b are formed as an integrated metallized part without being divided, the amount of expensive material used to form the metallized part increases. . Further, due to the difference in thermal expansion coefficient between the material of the metallized portion and the ceramic heater 21 and the metal outer cylinder 25, excessive thermal stress is generated on the surface of the ceramic insulating base 39, and the high temperature state and the room temperature state are repeated. As a result, the surface of the ceramic insulating base 39 may be damaged. Therefore, the first metallized portion 24a and the second metallized portion 24b are formed separately.
  • the surface area of the second metallized portion 24b is smaller than the surface area of the first metallized portion 24a. Accordingly, the brazing material 27 may not be sufficiently present for the second metallized portion 24 b that does not contribute to the electrical connection between the negative electrode 33 and the metal outer cylinder 25. The amount can be reduced, which can contribute to a reduction in manufacturing cost.
  • FIG. 3 shows a ceramic heater assembly 20 used in a variation of the glow plug of the present embodiment.
  • a metal layer peeling portion 26 b is provided not only on the metal layer peeling portion 26 a at the tip of the metal outer cylinder 25 but also on the inner peripheral surface of the metal outer cylinder 25.
  • This metal layer peeling part 26b is provided in the position of the rear end side rather than the area
  • the metal layer peeling portion 26a can also reduce the amount of brazing material 27 used.
  • a silver-copper (Ag—Cu) -based brazing material containing titanium (Ti) is used on the radially outer peripheral surface of the ceramic heater 21.
  • One metallized portion 24a and a second metallized portion 24b are formed.
  • the first metallized portion 24a is formed corresponding to the position where the negative electrode 33 is provided.
  • the second metallized portion 24b is formed at a position corresponding to the position of the tip of the metal outer cylinder when assembled to the metal outer cylinder.
  • the large-diameter lead portion 40 is joined to the rear end surface of the ceramic heater 21 from which the positive electrode 31 is exposed using the brazing material 27.
  • a metal layer 26 is formed on the entire inner peripheral surface and outer peripheral surface of the metal outer cylinder 25 by nickel-boron (Ni-B) plating, and then the metal A part of the layer 26 is mechanically removed to form metal layer peeling portions 26a and 26b as shown in FIG.
  • the metal layer peeling portion 26a is formed by removing the metal layer at the tip of the metal outer cylinder 25, and the metal layer peeling portion 26b is provided on the outer peripheral surface of the ceramic heater 21 when the ceramic heater 21 is assembled. It is formed by removing the metal layer in the region located on the rear end side with respect to the first metallized portion 24a.
  • the ceramic heater 21 is inserted into the metal outer cylinder 25.
  • the ceramic heater 21 and the metal outer cylinder 25 are arranged with their tip ends upward.
  • a brazing material 27a such as silver brazing 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 cannot be placed inside the metal outer cylinder 25. It has become a thing. Therefore, it is supposed to be placed at the entrance of the gap.
  • the brazing material 27 a is heated and melted and poured into 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 27 a is less likely to flow to the outer peripheral surface side of the metal outer cylinder 25.
  • the brazing material 27a is efficiently used. It flows into the gap.
  • brazing material 27a Since the brazing material 27a is poured in the state where the ceramic heater 21 and the metal outer cylinder 25 are held so that the front end faces upward, the brazing material 27a reaches the region of the first metallized portion 24a. This makes it easier to reduce the amount of brazing material 27a used.
  • the metal layer peeling part 26b is provided also in the part located in this. Therefore, the brazing material 27a is prevented from flowing out to a region that does not contribute to bonding.
  • the ceramic heater assembly 20 is obtained by joining the cylinder 25. Thereafter, although not shown, the ceramic heater glow plug 10 shown in FIG. 1 is manufactured through steps such as joining the ceramic heater assembly 20 in the housing 11 and electrically connecting the external connection terminals 15. be able to.
  • a metal is attached to the tip of the metal outer cylinder 25.
  • the metallized portion provided on the outer peripheral portion of the ceramic heater 21 as well as forming the layer peeling portion 26a, the first metallized portion 24a serving as a joint portion covering the negative electrode 33, and the brazing material 27 are made of the ceramic heater 21 and the metal outer portion.
  • the glow plug 10 and the manufacturing method thereof according to the present embodiment since the first metallized portion 24a and the second metallized portion 24b are formed separately, one metallized portion in a wide range. As compared with the case of forming the wire, the area of the joint that contributes to the electrical connection between the negative electrode 33 and the metal outer cylinder 25 can be reduced, and the amount of the brazing material 27 used can be easily reduced. In addition, the amount of material used to form the metallized portions 24a and 24b is also reduced. Therefore, an increase in manufacturing cost of the ceramic heater type glow plug 10 can be suppressed.
  • the brazing material 27a is disposed, and in the process of melting, the ceramic heater 21 and the metal outer cylinder 25 are disposed with the front end side upward.
  • the brazing material 27a is placed on the tip of the metal outer cylinder 25 and melted.
  • the metal layer peeling portion 26a at the tip of the metallic outer cylinder 25 prevents the brazing material from wrapping around the outer peripheral surface side of the metallic outer cylinder 25.
  • the brazing material 27a can be efficiently poured into the joint between the ceramic heater 21 and the metal outer cylinder 25 by the two metallized portions 24b.
  • the surface area of the second metallized portion 24b is made smaller than the surface area of the first metallized portion 24a.
  • the metal layer 26 on the inner peripheral surface of the metal outer cylinder 25 is formed on the ceramic heater 21 from the tip of the metal outer cylinder 25.
  • the first metallized portion 24a is provided in a region up to a position corresponding to the end portion on the rear end side.
  • the glow plug and the method for manufacturing the same according to the second embodiment of the present invention are the first in that at least one of the first metallized portion 24a and the second metallized portion 24b is divided into a plurality of sections. This is different from the glow plug according to the embodiment.
  • FIG. 8A and 8B are axial sectional views of ceramic heater assemblies 20A and 20B of the glow plug according to the present embodiment.
  • the second metallized portion 24b is divided into a plurality of sections 24ba and 24bb.
  • the first metallized portion 24a is divided into a plurality of sections 24aa and 24ab.
  • the first metallization unit 24a and the second metallization unit 24b may be divided into a plurality of sections.
  • the joint area between the ceramic heater 21 and the metal outer cylinder 25 can be further reduced in addition to the effects described in the first embodiment.
  • damage to the surface of the ceramic heater 21 can be further reduced.
  • the glow plug and the manufacturing method thereof according to the third embodiment of the present invention when the second metallized portion 24b is divided into a plurality of sections, the axial length of the ceramic heater 21 in each of the divided sections. This is different from the glow plugs according to the first and second embodiments in that the length is longer than the circumferential length.
  • FIG. 9 shows an axial sectional view of a ceramic heater assembly 20C of the glow plug according to the present embodiment.
  • each of the sections 24ba, 24bb, 24bc of the divided second metallized portion 24b has a length along the axial direction (X direction) of the ceramic heater 21 in the circumferential direction (Y direction). It is formed longer than the length along. Therefore, when the brazing material 27 is melted and poured into the gap between the ceramic heater 21 and the metal outer cylinder 25, the brazing material 27 can be efficiently moved to the joint portion of the first metallized portion 24a.
  • the brazing material 27 to the first metallized portion 24a is further provided. Is efficiently performed, and an effect of improving the reliability of electrical connection between the negative electrode 33 of the ceramic heater 21 and the metal outer cylinder 25 can be obtained.
  • the glow plug according to the embodiment of the present invention described above shows one aspect of the present invention and does not limit the present invention, and each embodiment is arbitrarily changed within the scope of the present invention. Is possible.
  • the present invention is not limited to such a configuration.

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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)

Abstract

La présente invention concerne une bougie de préchauffage d'élément chauffant en céramique permettant d'empêcher, dans la mesure du possible, les zones autres qu'une partie joint d'être entourées de matériau à braser lorsqu'un élément chauffant en céramique et un tube externe métallique sont brasés, et permettant d'appliquer à la partie joint le moins de matériau à braser possible. La présente invention concerne également un procédé permettant de fabriquer ladite bougie de préchauffage. Le procédé permettant de fabriquer une bougie de préchauffage d'élément chauffant en céramique (dans laquelle une extrémité d'un tube externe métallique retient un élément chauffant en céramique et l'autre extrémité est insérée à l'intérieur et fixée dans un trou intérieur d'un logement) comprend une étape au cours de laquelle une première partie métallisée est formée de façon à recouvrir une électrode exposée au niveau de la partie circonférentielle externe de l'élément chauffant en céramique dans la direction circonférentielle, et une seconde partie métallisée dans le but d'améliorer la mouillabilité de la surface est formée à l'emplacement correspondant à la partie pointe du tube externe métallique, plus proche de la pointe que la première partie métallisée.
PCT/JP2013/074635 2012-11-29 2013-09-12 Bougie de préchauffage d'élément chauffant en céramique et son procédé de fabrication Ceased WO2014083913A1 (fr)

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EP13858638.3A EP2927590A4 (fr) 2012-11-29 2013-09-12 Bougie de préchauffage d'élément chauffant en céramique et son procédé de fabrication
JP2014550061A JP6005175B2 (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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JP2012-260603 2012-11-29

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2015163112A1 (fr) * 2014-04-24 2015-10-29 ボッシュ株式会社 Procédé de fabrication de bougie de préchauffage du type à élément chauffant en céramique et bougie de préchauffage du type à élément chauffant en céramique
WO2016152302A1 (fr) * 2015-03-23 2016-09-29 ボッシュ株式会社 Bougie de préchauffage du type à élément chauffant en céramique
JP2019124367A (ja) * 2018-01-11 2019-07-25 株式会社デンソー グロープラグ
JP2021099175A (ja) * 2019-12-20 2021-07-01 ボッシュ株式会社 グロープラグ

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Publication number Priority date Publication date Assignee Title
JP6665495B2 (ja) 2015-11-11 2020-03-13 株式会社デンソー セラミックヒータ

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