WO2016096519A1 - Élément électrique chauffant et mise en contact présentant une durabilité améliorée - Google Patents

Élément électrique chauffant et mise en contact présentant une durabilité améliorée Download PDF

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Publication number
WO2016096519A1
WO2016096519A1 PCT/EP2015/078902 EP2015078902W WO2016096519A1 WO 2016096519 A1 WO2016096519 A1 WO 2016096519A1 EP 2015078902 W EP2015078902 W EP 2015078902W WO 2016096519 A1 WO2016096519 A1 WO 2016096519A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating element
contact point
contacting means
electric heating
contacting
Prior art date
Application number
PCT/EP2015/078902
Other languages
German (de)
English (en)
Inventor
Dietmar Hahn
Simon Schmittinger
Bruno CERON NICOLAT
Manuel Giesen
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN201580069469.3A priority Critical patent/CN107113922A/zh
Priority to EP15816104.2A priority patent/EP3234467A1/fr
Publication of WO2016096519A1 publication Critical patent/WO2016096519A1/fr

Links

Classifications

    • 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
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/027—Heaters specially adapted for glow plug igniters

Definitions

  • the invention relates to an electrical heating element and an arrangement of such a heating element and an associated contacting means.
  • glow plugs are used, which preheat the combustion chamber electrically.
  • glow plugs are for example from the
  • EP 1 328 138 A1 from JP 4310565 B2, from EP 1 768 456 B1, from WO 2014/064279 AI and from WO 2010/071049 AI.
  • the glow plug contains an electrical heating element that requires a supply line to the positive pole and a supply line to the negative pole of the vehicle battery for operation.
  • the supply line for the negative terminal is usually provided by a corresponding on the outer circumference of the electric heating element
  • Heating element and associated contacting means according to the independent claims. Further advantageous embodiments will be apparent from the dependent claims.
  • an electrical heating element which contains an electrically insulating base body, in which a heating conductor is embedded. From the heat conductor at least two leads are to
  • these contact points are connected by flush-contacting means with a arranged outside the main body power source.
  • the resulting thermal stresses during heating of the heating element are partially deflected by the chamfered contact point, so that their tendency to interrupt the connection of the contact point with the contacting, is reduced.
  • connection between the contact point and the contacting agent need not be held exclusively by pressing. It may, for example, additionally be secured by soldering or local melting of the contact zone. If these methods are used, pressing can be dispensed with altogether.
  • the contacting means may be connected in any way with a pole of the power source or an outgoing from it feed, for example by welding, soldering or local melting of the contact zone.
  • the supply line does not have to be chamfered along one plane.
  • Cut surface, along which it is chamfered, can also be curved. she may in particular run along a cone sheath.
  • Cut surface arises, for example, when a body with a embedded lead is cut conically.
  • the heating conductor For the main body, the heating conductor, the supply lines and the
  • the base body may be a ceramic.
  • a heating element according to the invention does not necessarily have to be made from scratch. It is also possible to upgrade heating elements according to the prior art to heating elements according to the invention. For this purpose, for example, the heating element provided with a slope, there a
  • At least one of the contact points is connected to a supply line via an electrically conductive bridge running at least partially outside the main body.
  • the bridge for example, by a metal pin, a
  • Metallization on the surface of the body or be realized by a solder joint may be realized by a solder joint.
  • the base is cylindrical in at least part of the area between the two contact points.
  • This cylinder is particularly preferably a circular cylinder. This shape is not only rotationally symmetric, but also the easiest to machine mechanically. However, the cylinder may also have a polygonal cross-section, for example.
  • the cylindrically shaped region of the main body opens into a cone or truncated cone.
  • the first contact point is arranged in the region of the jacket of the cone or truncated cone, so that the heating conductor can be connected to the current source on a path leading through this jacket.
  • the cone does not have a circular base, but can expressly have a polygonal base, so that its coat has edges.
  • the designed as a cone or truncated cone portion of the body is on the one hand particularly easy to manufacture mechanically, such as by twisting. On the other hand, it enables a self-centering connection between the contact point and the contacting means in a particularly simple manner.
  • At least one second contact point is advantageously arranged in the region of the jacket of the region in which the base body is of cylindrical design.
  • the heating conductor can be connected to the current source on a path leading through this jacket.
  • Such a contact point is particularly easy to connect with a contacting agent. For example, it may be sufficient to clamp the cylindrical base body precisely in a cylindrical holder.
  • the heating element is designed as a starting aid for a vehicle engine.
  • a first advantageous arrangement of an electrical heating element according to the invention and an associated contacting means utilizes a cylinder, which is arranged on a cylinder of the vehicle engine and is connected to the vehicle mass, as contacting means.
  • the connection to the contact point, which is arranged in the region of the cylinder jacket of the main body, is produced by inserting this cylindrical basic body into the cylindrical socket. Then, no additional line in the vehicle must be laid for the connection of the heating element to the negative terminal of the battery.
  • the socket can be used to remove excess heat from the heating element. A particularly high temperature is needed only at the end of the glow plug, which is the combustion chamber in the cylinder
  • a circumferential sleeve which is supported on the first contact point, as a contacting means.
  • This sleeve can in particular run within a socket, in which the electric heating element can be inserted.
  • the heat emitted by the heating element is not only emitted as desired in the environment of the heating element, but at the same time by heat conduction in both leads (plus and minus) coupled.
  • a circumferential sleeve makes it possible to accommodate a large cross-section for the dissipation of this heat in a very small volume of construction.
  • such a sleeve is particularly well suited for a self-centering mounting of the contact point of the contacting.
  • the connection can be made, for example, by applying a biasing force between the heating element and the
  • the contacting means is designed as a spring element for exerting a normal force on the first contact point.
  • the contacting means may be formed, for example, as a grid or mesh, which may then be stretchable in particular.
  • the contacting means on a strain compensation area for receiving forces due to thermal expansion of the body. Then this thermal expansion does not necessarily mean that the contact force between the body and the contacting, and thus the quality of the connection between the contacting and the contact point, permanently weakened by frequent heating and cooling
  • an at least partially bounded by the contacting means space is filled with a heat-insulating material. The room does not have to go through that
  • the main body or a pole of the power source or an outgoing from such a pole lead to which the contacting is attached contribute.
  • the thermal insulation reduces unwanted heat input, for example, to the pole, the lead or the connection of the pole or the lead with the contacting.
  • heat-insulating material are suitable in addition to air or vacuum, for example:
  • a porous or cellular structure such as a foam, made of carbon, ceramic or a metal
  • FIG. 5 Conversion of a heating element according to the prior art to a heating element according to the invention.
  • FIG. la shows the basic use of a heating element 1 for
  • the heating element 1 is guided through a hole in the wall 2a of the cylinder 2 into the combustion chamber 2e. Air can be sucked into the combustion chamber through an inlet valve 2b. Combustion gases can be expelled via an exhaust valve 2c. An injector 2d supplies the diesel fuel in the finest droplets.
  • Glow plug is enclosed, supported.
  • Figure lb illustrates the electrical contact and the internal structure of the heating element 1.
  • the heating element consists of a base body 11 and includes a heating element 12, from the leads 13a and 13b go out.
  • the supply line 13a is led to a first contact point +, which is connected by a solder connection with a contacting means 14a.
  • the supply line 13b is connected by the lateral surface of the substantially cylindrical main body 11 with a second contact point.
  • a metallic frame 14b, with the Vehicle mass is connected and into which the body is accurately inserted, serves as a contacting means for the contact point.
  • Contacting means 14a and 14b are connected to a current source 15.
  • Figure 2 shows an embodiment of the invention, in which a conically tapered body 11 via a peripheral sleeve than this
  • the main body 11 has an area IIa, in which it is formed as a rounding or as a truncated cone. When operating in a glow plug, this area is arranged in the combustion chamber 2e. A region IIb adjoins the region IIa along the longitudinal axis of the main body 11, in which region the basic body is circular-cylindrical. In this area, the contact point - is arranged, which belongs to the supply line 13b. By the base body 11 is inserted accurately in a connected to the vehicle ground socket 14b, the contact point - is connected to the negative pole of the power source 15 (vehicle battery).
  • the power source 15 vehicle battery
  • the area 11c adjoins the area IIb, in which the base body is formed as a truncated cone.
  • the supply line 13a opens into a contact point +, which lies on the lateral surface of the truncated cone 11c and is thereby bevelled.
  • the circumferential sleeve 14a is supported on the mantle of the truncated cone 11c and thus also on the contact point +. It runs concentrically to the socket 14b. With the positive terminal 15a of the power source 15, the sleeve 14a is connected by soldering, welding, caulking or pressing.
  • the filling material 14al consists of a powder or a porous body, which is formed as metal, ceramic or as a mixture of metal and ceramic.
  • FIG. 3 shows the integration of a strain compensation region into the exemplary embodiment shown in FIG.
  • the expansion-compensating portion 14a2 is disposed on the circumferential sleeve 14a between the truncated cone 11c and the positive pole 15a. If the elongated main body 11 thermally expands, the Expansion compensation area 14a2 on the resulting forces. If the main body 11 cools down again, the expansion compensation area 14a2 springs back, so that the prestressing force between the sleeve 14a and the contact point + is retained.
  • the contact point is - as in the previous embodiment by the version IIb with the vehicle mass, and thus also with the negative pole of the
  • FIG. 4 shows the combination of a tapered heating element 1 with a contacting element 14a designed as a spring element 14a3.
  • the spring element 14a3 has jaws 14a4, which against the spring force in
  • Base 11 is pressed from the right against the jaws 14a4, so that the spring force exerts a normal force on the contact point + on the truncated cone shell at the end of the main body 11.
  • the contact point - on the cylinder surface of the base body 11 is as in the previous embodiments by
  • Spring element 14a3 is filled with filling material 14al to prevent heat transfer to the positive pole 15a.
  • 5 shows the conversion of a heating element 1 according to the prior art to a heating element 1 according to the invention.
  • the left end of the main body 11 (area 11c) was as cylindrical as the adjacent area IIb before the conversion.
  • the supply line 13a occurred in the region 11c in the
  • the cylindrical shape was first ground to a truncated cone in area 11c.
  • a new contact point + was created by applying a metallization. This was made with a metallic bridge 16 with the from the central axis of the
  • Truncated truncated lead 13a connected. On the coat of the Truncated cone, and thus also on the new contact point +, the circumferential sleeve 14a is supported as a contacting. It is connected via a solder connection to the positive terminal 15a of the power source.
  • the second contact point - which belongs to the supply line 13b - is connected to the vehicle ground via the holder 14b, in which the main body 11 is inserted. This closes the circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)

Abstract

L'invention concerne un élément électrique chauffant (1) qui contient un corps de base (11) électriquement isolant dans lequel est incorporé un conducteur chauffant (12). Au moins deux lignes d'alimentation (13a, 13b) sont amenées du conducteur chauffant jusqu'à des points de contact (+, -), ces points de contact pouvant être connectés, par des moyens de mise en contact (14a, 14b) en affleurement, à une source de courant agencée à l'extérieur du corps de base. Selon l'invention au moins une première ligne d'alimentation (13a) est biseautée à un angle de 5° à 80°, de préférence de 30° à 50° au niveau d'un premier point de contact (+) auquel elle est amenée. Il est apparu qu'il est ainsi possible de créer une butée mécanique définie pour la connexion du premier point de contact (13a) au moyen de mise en contact (4a). Ceci permet de maintenir la connexion du point de contact (13a) au moyen de mise en contact (14a) par pression mécanique. La connexion tient et ne se défait plus, et présente la durabilité des connexions par brasage ou des cordons de soudure. L'invention concerne également des ensembles d'éléments chauffants (1) selon l'invention et de moyens de mise en contact (14a, 14b) configurés spécialement, lesquels sont caractérisés par une durabilité sensiblement améliorée, en particulier lors de cycles de températures fréquents, du fait de la meilleure connexion entre le conducteur chauffant (12) et les moyens de contact (14a, 14b).
PCT/EP2015/078902 2014-12-18 2015-12-08 Élément électrique chauffant et mise en contact présentant une durabilité améliorée WO2016096519A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580069469.3A CN107113922A (zh) 2014-12-18 2015-12-08 具有改善的耐用性的电加热元件和接触装置
EP15816104.2A EP3234467A1 (fr) 2014-12-18 2015-12-08 Élément électrique chauffant et mise en contact présentant une durabilité améliorée

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014226433.2A DE102014226433A1 (de) 2014-12-18 2014-12-18 Elektrisches Heizelement und Kontaktierung mit verbesserter Haltbarkeit
DE102014226433.2 2014-12-18

Publications (1)

Publication Number Publication Date
WO2016096519A1 true WO2016096519A1 (fr) 2016-06-23

Family

ID=55022426

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/078902 WO2016096519A1 (fr) 2014-12-18 2015-12-08 Élément électrique chauffant et mise en contact présentant une durabilité améliorée

Country Status (4)

Country Link
EP (1) EP3234467A1 (fr)
CN (1) CN107113922A (fr)
DE (1) DE102014226433A1 (fr)
WO (1) WO2016096519A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2117280A1 (fr) * 2007-02-22 2009-11-11 Kyocera Corporation Dispositif de chauffage en ceramique, bougie de prechauffage utilisant le dispositif de chauffage en ceramique, et procede de fabrication du dispositif de chauffage en ceramique
DE102009056057A1 (de) * 2008-11-27 2010-06-10 Beru Ag Glühkerze und Verfahren zu ihrer Herstellung
EP2247156A1 (fr) * 2008-01-29 2010-11-03 Kyocera Corporation Dispositif de chauffage en céramique et bougie de préchauffage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10208853A (ja) * 1996-11-19 1998-08-07 Ngk Spark Plug Co Ltd セラミックヒータ、およびその製造方法
JP4310565B2 (ja) 2000-10-13 2009-08-12 ボッシュ株式会社 セラミックヒータ型グロープラグおよびその製造方法
JP3589206B2 (ja) 2000-10-17 2004-11-17 株式会社ボッシュオートモーティブシステム セラミックスヒータ型グロープラグおよびその製造方法。
EP1768456B1 (fr) 2004-05-27 2013-06-26 Kyocera Corporation Radiateur céramique, et connecteur néon utilisant ledit radiateur
CN101228396B (zh) * 2005-07-26 2010-06-23 京瓷株式会社 钎焊构造体、陶瓷加热器以及热线点火塞
WO2010071049A1 (fr) 2008-12-15 2010-06-24 京セラ株式会社 Dispositif de chauffage céramique
EP2725298B1 (fr) 2012-10-26 2017-11-22 SIEVA d.o.o., PE Spodnja Idrija Procédé de fabrication d'une bougie de préchauffage à bimatériau

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2117280A1 (fr) * 2007-02-22 2009-11-11 Kyocera Corporation Dispositif de chauffage en ceramique, bougie de prechauffage utilisant le dispositif de chauffage en ceramique, et procede de fabrication du dispositif de chauffage en ceramique
EP2247156A1 (fr) * 2008-01-29 2010-11-03 Kyocera Corporation Dispositif de chauffage en céramique et bougie de préchauffage
DE102009056057A1 (de) * 2008-11-27 2010-06-10 Beru Ag Glühkerze und Verfahren zu ihrer Herstellung

Also Published As

Publication number Publication date
EP3234467A1 (fr) 2017-10-25
DE102014226433A1 (de) 2016-06-23
CN107113922A (zh) 2017-08-29

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