EP1216384A1 - Bougie crayon de prechauffage - Google Patents

Bougie crayon de prechauffage

Info

Publication number
EP1216384A1
EP1216384A1 EP00967518A EP00967518A EP1216384A1 EP 1216384 A1 EP1216384 A1 EP 1216384A1 EP 00967518 A EP00967518 A EP 00967518A EP 00967518 A EP00967518 A EP 00967518A EP 1216384 A1 EP1216384 A1 EP 1216384A1
Authority
EP
European Patent Office
Prior art keywords
glow plug
control circuit
glow
switch
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00967518A
Other languages
German (de)
English (en)
Other versions
EP1216384B1 (fr
Inventor
Hans-Peter Bauer
Albrecht Geissinger
Johannes Locher
Werner Teschner
Jochen Neumeister
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.)
Robert Bosch GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7922103&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1216384(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1216384A1 publication Critical patent/EP1216384A1/fr
Application granted granted Critical
Publication of EP1216384B1 publication Critical patent/EP1216384B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • 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 present invention relates to a glow plug as it is used in glow systems consisting of control unit and glow plug for self-igniting internal combustion engines.
  • Glow plugs are known for example from DE-OS 28 02 625.
  • Such a glow plug consists of a tubular metallic housing which has a thread on its outer circumference, with the aid of which the glow plug is screwed into the cylinder.
  • a glow plug is cantilevered from the housing so that it projects into the combustion chamber when a glow plug is installed in the engine.
  • a heating device is arranged in the glow plug, which is in contact with the supply voltage on the combustion chamber side for the ground connection to the closed bottom of the glow plug and away from the combustion chamber via a contact bolt.
  • Ceramic glow plugs are also known in which the part protruding into the combustion chamber consists of ceramic.
  • the current through the heating device is switched on or off by a glow time control device via a switch (relay, power transistor) in the control device.
  • the glow plug with the characterizing features of the main claim has the advantage over the known arrangement that the switch for switching the glow current on and off is integrated in the housing of the glow plug. Since this switch only switches the current of a single candle, it can be made relatively small. Due to the arrangement in the vicinity of the candle thread and the good coupling to the cylinder head, good cooling is also guaranteed for the operation of the candle when the engine is cold before starting or in the warm-up phase. At the
  • Circuit breaker built-in an integrated circuit part also reduces the total number of electrical lines required.
  • a separate glow time control device can be completely dispensed with under certain circumstances or a more compact design is possible. If the control is integrated into the glow plug housing, there is also the option of recording and evaluating the glow temperature directly on site. In this way, changes in operating conditions can be reacted to very quickly and in the best possible way.
  • the glow time control device ensures the regulation of the glow temperature
  • the control coil which ensures due to its positive resistance coefficient that the glow temperature does not reach impermissibly high values, can be dispensed with in the glow plug.
  • Another The advantage results from the use of a semiconductor chip as switching means. By installing in the housing of the glow plug, the chip is adequately protected from external influences, so that when the semiconductor switch is installed in the glow plug, the commercially available transistor housing can be omitted and costs can be reduced.
  • FIG. 1 shows a first embodiment
  • FIG. 2 shows a second embodiment
  • FIG. 3 shows a third embodiment
  • FIG. 4 shows a fourth embodiment
  • FIG. 5 shows a fifth embodiment of the glow plug according to the invention
  • FIGS. 7 and 9 electrical equivalent circuit diagrams for glow plug according to the invention
  • FIG. 10 a sixth embodiment of the glow plug according to the invention.
  • the basic structure of a glow plug according to FIGS. 1 to 5 consists of a tubular metallic housing 10, in the longitudinal bore of which a glow plug 11 is inserted with part of its length in a sealing manner.
  • the glow plug 11 consists of a glow tube 12 which is closed at the end on the combustion chamber side and in which there is an axially
  • Extends heating device which consists of a heating coil 14 arranged on the combustion chamber side and a control coil 15 arranged remote from the combustion chamber.
  • the known heating coils are shown here for simplicity as resistors.
  • the heating device is embedded in insulating material 16 and thus insulated from the wall of the glow tube 12.
  • the structure and mode of operation of such a glow plug are already sufficiently known from the prior art cited at the beginning and are not to be explained in more detail here.
  • the glow tube 12 with the heating coils 14 represents a heating element protruding into the combustion chamber.
  • the housing 10, together with the insulation material 16 and the control coil 15, represents an electrical feedthrough for supplying electrical energy to the combustion chamber. Since in FIGS the same basic structure of the glow plug is assumed, the same components have been given the same reference numerals.
  • a switching unit is arranged in a housing 300 on the side facing away from the combustion chamber in the glow plug according to the invention.
  • a switch is provided in the switching unit 300, by means of which the current flow through the heating device 13 can be switched on or off.
  • the switching unit 300 is over Plug contacts 301 are connected to leads 19, via which a supply voltage and signals of a control device, not shown here, are supplied. It is essential that a temperature suitable for the use of semiconductor circuits prevails inside the housing 10. This results from the fact that the housing represents a passage of current through the wall of a cylinder of an internal combustion engine and such cylinders are cooled (as a rule by water cooling). Since the housing is in direct contact with the wall of the cylinder, the housing 10 and the interior of the housing are also cooled. Semiconductor circuits can thus be used for the switches according to the invention in the area or interior of the housing.
  • the control coil 15 is contacted on the side facing away from the combustion chamber by means of a metallic connecting element 120.
  • a metallic connecting element 120 is now shown, which on the side of the candle facing away from the combustion chamber, i.e. towards the connecting lines 19 has a flattened area.
  • the switching unit 300 is now arranged on this flattened area and is coated with the flattened side of the surface using a metallically conductive layer, for example a solder or a conductive adhesive
  • the switching unit 300 consists, for simplification, of a transistor which has a metallic drain connection on the underside and two connection lugs 301 which are then connected to the source and the gate of the transistor.
  • a semiconductor switch transistor
  • any combination of a semiconductor switch (transistor) with an "intelligent" circuit can of course also be used.
  • the advantage of a packaged component is that it Components in the manufacture of the glow plugs are particularly easy to handle.
  • FIG. 2 shows a second exemplary embodiment in which the switching unit is designed as an unencapsulated silicon chip 302.
  • the silicon chip 302 is arranged on an insulating layer 304, so that the underside of the silicon chip is electrically insulated from the flattened region of the connecting element 120.
  • the connection to the connecting lines 19 is established by bonding wires 303.
  • An electrical connection to the connecting element 120 is likewise produced from the top side of the silicon chip 302 by means of bonding wires 303. It is advantageous here that unencapsulated silicon elements are generally cheaper than packaged components, require less space and that the housing of the glow plug itself is sufficient packaging for the silicon chip 302.
  • FIG. 1 A further exemplary embodiment of the glow plug according to the invention is shown in FIG.
  • the connecting element 120 is designed as it was already described for FIG. 1 with a round part for contacting the control coil 15 and with a flattened part to the rear on which a semiconductor chip 302 without a housing is applied according to FIG. Contacting the
  • the connecting line 19 is here again made by bonding wires 303 which are fastened on the upper side of the semiconductor chip 302 and thus create a connection to the connecting lines 19.
  • the electrical contact to the metallic connecting element 120 is made simply by the fact that the
  • Semiconductor chip 302 is applied with its rear side directly to the area of the metallic connecting element 120 flattened to the rear.
  • the semiconductor chip 302 contains a power transistor whose drain connection is formed by the rear side of the semiconductor chip 302.
  • the example according to FIG. 4 differs from the example according to FIG. 3 only in that the last piece of the feed lines 19 is designed such that it can be attached directly to the surface of the chip 302. This can take place, for example, in that the last piece of the supply lines 19 is designed as thin sheets which can be soldered directly to the surface of a semiconductor chip 302 by means of corresponding soldering points 305.
  • a connecting element 120 is used in FIG. 5, which is completely rotationally symmetrical and has a completely flattened side on the side facing away from the combustion chamber.
  • the semiconductor chip 302 is applied on this flattened side, so that electrical contact is again established between the underside of the semiconductor chip 302 and the connecting element 120.
  • Solder balls 305 are again provided on the upper side of the semiconductor chip 302 and are used for contacting the leads 19.
  • FIG. 6 shows a block diagram of the entire glow system consisting of control unit 60 and glow plugs 61.
  • Control unit 60 is connected to glow plug 61 with a common line 19.
  • the glow plugs are connected to the supply voltage 200 via a further line 19.
  • FIG. 7 shows the equivalent circuit diagram of a glow plug according to FIG. 6.
  • a switch 70 is connected with one connection to the supply voltage 200 and on the other side in series with the control coil 15 and the heating coil 14 against a ground connection 201.
  • the switch 70 is opened or closed by a control circuit 73 via a corresponding line, the control circuit 73
  • Corresponding signals from control unit 60 are received via line 19.
  • the control circuit 73 receives an operating current from the supply connection 200.
  • the glow plugs described in FIGS. 1 to 7 thus have three electrical connections, the ground connection 201 generally being realized by the housing 10.
  • the supply connection 200 provides the electrical current, which supplies the electrical energy for heating via the switch 70.
  • the switching state of the switch 70 is ultimately determined via a third electrical connection.
  • Commercially available p- or n-channel power MOS fets can usually be used for the switches 70.
  • the drive circuit 73 and the switch 70 are integrated on a semiconductor chip.
  • the connecting line 19 between the control unit 60 and the glow plugs 61 can also be used for the backflow of information from the glow plugs 61 to the control unit 60.
  • the control circuit 73 is then to be equipped with correspondingly more intelligence, ie it must then be able to transmit certain information from the individual glow plug back to the control unit 60.
  • This function can also be activated, for example, only for diagnostic purposes, ie an individual query is made in a special operating state individual glow plugs 61 with regard to the functions they perform.
  • FIG. 8 shows a further connection of a control device 60 with glow plugs 61.
  • the glow plugs 61 have only a single connection with which they are then connected to the control device 60 via the line 19.
  • the control unit 60 provides the operating energy necessary for the operation of the glow plugs 61 via the line 19.
  • the control signal for the circuit is additionally modulated onto line 19.
  • both the switch 70 and the evaluation circuit 73 are connected to the one connecting line. There is then always a voltage level on line 19 which is sufficient for the operation of glow plugs 61, with additional ones
  • Voltage pulses the control circuit 73 recognizes that the switch 70 should now be operated. This can be done, for example, by bit sequences or frequency signals, which are then recognized by the control circuit 73.
  • a simple example can consist in that a higher-frequency signal is simply superimposed on the usual voltage level, which signal is then recognized by the control circuit 73 and leads to the switch 70 being closed.
  • FIG. 9 shows a further advantageous circuit example which is based on a connection 200 for the operating voltage and a line 19 for the control signals from the control unit 60.
  • the switching unit 73 receives the control signals from the control unit 60 and a supply voltage from the connection 200 here.
  • the switch 70 is arranged here in series with the voltage supply 200 to the heating coil 14 and the ground connection 201.
  • the use of a control coil is dispensed with and only one heating coil 14 is used intended.
  • the function of the control coil is to limit the current flow through the heating coil 14 after a certain warm-up period. This is done by choosing a material for the control coil, the resistance of which increases with increasing temperature.
  • a temperature measuring element can then be arranged on the semiconductor chip, which measures the temperature of the glow plug.
  • the temperature of the glow plug at the location of the semiconductor chip depends on the temperature at the tip of the glow plug, so that the temperature at the tip of the glow plug can be inferred from the temperature measured on the semiconductor chip.
  • Another way of determining the temperature of the glow plug is to measure the temperature of the heating pin.
  • the temperature of the heating pin can be measured if the heating resistor has a temperature dependence of the resistance.
  • the temperature of the glow plug can then be determined by measuring the resistance of the heating element.
  • other temperature-sensitive measuring elements can be provided, which can be arranged in the area of the heating element.
  • the drive circuit is then designed so that it in
  • the current flow through the heating coil 14 is limited. This can be done for example by pulse modulation, ie the control circuit 73 will open or close the switch 70 depending on the temperature profile in order to set a desired temperature on the heating coil 14. This measure would significantly simplify the construction of the glow plug.
  • the current flow through the heating coil can also be integrated via the current flow through the heating coil the time, resistance of the heating coil or other methods can be inferred indirectly from the temperature of the glow plugs. These methods are therefore technically equivalent.
  • FIG. 10 A further embodiment of the glow plug according to the invention is shown in FIG. 10, a so-called ceramic glow plug being shown in FIG.
  • the glow tube 11 consists of a first and a second conductive ceramic layer 501, 502 between which an insulating ceramic layer 503 is arranged.
  • the first and second conductive ceramic layers 501, 502 are connected to one another with a thinned tip region 504, so that a current flow from the ceramic conductive layer 501 over the thinned one
  • Tip area 504 to the second conductive ceramic layer 502 is possible.
  • the glow tube 11 is in turn held at the end facing away from the combustion chamber by a housing 10.
  • the first ceramic conductive layer 501 extends further to the right in the housing 10 and a chip 302 is then applied to this area, which is connected to a lead 19 by means of a bonding wire 303.
  • a vertical transistor is again arranged in the chip 202, which allows a current to flow from the upper side of the chip 202 to the lower side of the chip 202, so that an electrical current can be fed into the first conductive layer 501 via the chip 202.
  • the entire ceramic layers are covered here with a superficial thin glass layer, which is only in the area under the silicon chip 302 and in one

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Resistance Heating (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

L'invention concerne une bougie crayon de préchauffage pour moteurs à combustion interne à auto-allumage, qui comporte un élément chauffant électrique faisant saillie dans une chambre de combustion du moteur à combustion interne et un passage permettant l'amenée d'un courant de chauffage destiné à l'élément de chauffage, par une ouverture de la chambre de combustion. Dans la zone dudit passage est placé un commutateur, le courant de chauffage pouvant être commandé par ouverture et fermeture de ce commutateur.
EP20000967518 1999-09-15 2000-08-12 Bougie crayon de prechauffage Revoked EP1216384B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19944193 1999-09-15
DE19944193A DE19944193A1 (de) 1999-09-15 1999-09-15 Glühstiftkerze
PCT/DE2000/002730 WO2001020229A1 (fr) 1999-09-15 2000-08-12 Bougie crayon de prechauffage

Publications (2)

Publication Number Publication Date
EP1216384A1 true EP1216384A1 (fr) 2002-06-26
EP1216384B1 EP1216384B1 (fr) 2004-10-27

Family

ID=7922103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000967518 Revoked EP1216384B1 (fr) 1999-09-15 2000-08-12 Bougie crayon de prechauffage

Country Status (10)

Country Link
EP (1) EP1216384B1 (fr)
JP (1) JP4605735B2 (fr)
KR (1) KR100709910B1 (fr)
BR (1) BR0014006A (fr)
CZ (1) CZ2002845A3 (fr)
DE (2) DE19944193A1 (fr)
HU (1) HU224254B1 (fr)
PL (1) PL195184B1 (fr)
SK (1) SK286219B6 (fr)
WO (1) WO2001020229A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI21857A (sl) * 2004-07-19 2006-02-28 Cosylab, D.O.O. Zarilna svecka z integriranim krmilnikom
JP4225273B2 (ja) 2004-11-25 2009-02-18 株式会社デンソー グロープラグ
DE102006005710A1 (de) * 2006-02-08 2007-08-09 Robert Bosch Gmbh Vorrichtung und Verfahren zur Steuerung wenigstens einer Glühkerze eines Kraftfahrzeugs
JP5948740B2 (ja) * 2011-06-01 2016-07-06 株式会社デンソー 制御部一体型グロープラグとその通電制御方法
JP5720452B2 (ja) * 2011-07-12 2015-05-20 株式会社デンソー 発熱体通電制御装置
JP5884390B2 (ja) * 2011-10-11 2016-03-15 株式会社デンソー 発熱装置
JP5817688B2 (ja) 2011-11-17 2015-11-18 株式会社デンソー グロープラグ通電制御装置
DE102013201048B4 (de) * 2013-01-23 2015-08-13 Robert Bosch Gmbh Glühstiftkerze
DE102013225267B4 (de) * 2013-12-09 2018-01-18 Robert Bosch Gmbh Glühkerze mit einem Glühelement und einem Brennraumdrucksensor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2802625C3 (de) * 1978-01-21 1985-07-18 BERU Ruprecht GmbH & Co KG, 7140 Ludwigsburg Glühkerze
JPS5949374A (ja) * 1982-09-15 1984-03-21 Nippon Denso Co Ltd グロ−プラグの通電装置
DE3327773A1 (de) * 1983-05-13 1984-11-15 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur kraftstoffeinspritzung in brennraeume
JPS63182280U (fr) * 1987-05-19 1988-11-24
JPH07167433A (ja) * 1993-12-13 1995-07-04 Isuzu Ceramics Kenkyusho:Kk 自己電流制御形グロープラグ
JPH07305845A (ja) * 1994-05-13 1995-11-21 Isuzu Ceramics Kenkyusho:Kk 自己制御型セラミツクス・グロープラグ
KR19980028424A (ko) * 1996-10-22 1998-07-15 김영귀 디젤 엔진용 글로우 플러그 및 그 제조방법
DE19842148C2 (de) * 1998-09-15 2002-02-07 Beru Ag Ionenstrom-Meßglühkerze für Brennkraftmaschinen und Anordnung zum Glühen und/oder Ionenstrommessen mit einer derartigen Glühkerze
DE19852485C2 (de) * 1998-11-13 2002-09-19 Beru Ag Glühkerze und Steckanschluss für eine Glühkerze

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0120229A1 *

Also Published As

Publication number Publication date
SK3532002A3 (en) 2002-12-03
HUP0202564A2 (en) 2002-12-28
PL353996A1 (en) 2003-12-15
DE50008442D1 (de) 2004-12-02
JP2003509652A (ja) 2003-03-11
EP1216384B1 (fr) 2004-10-27
WO2001020229A1 (fr) 2001-03-22
CZ2002845A3 (cs) 2002-09-11
JP4605735B2 (ja) 2011-01-05
BR0014006A (pt) 2002-05-21
DE19944193A1 (de) 2001-04-19
PL195184B1 (pl) 2007-08-31
KR20020035596A (ko) 2002-05-11
SK286219B6 (sk) 2008-05-06
KR100709910B1 (ko) 2007-04-24
HU224254B1 (hu) 2005-07-28

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