EP2856035B1 - Druckmessglühkerze - Google Patents

Druckmessglühkerze Download PDF

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Publication number
EP2856035B1
EP2856035B1 EP13718861.1A EP13718861A EP2856035B1 EP 2856035 B1 EP2856035 B1 EP 2856035B1 EP 13718861 A EP13718861 A EP 13718861A EP 2856035 B1 EP2856035 B1 EP 2856035B1
Authority
EP
European Patent Office
Prior art keywords
pressure
sensor
housing
glow plug
glow
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.)
Not-in-force
Application number
EP13718861.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2856035A1 (de
Inventor
Janpeter Wolff
Wolfgang Koetzle
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2856035A1 publication Critical patent/EP2856035A1/de
Application granted granted Critical
Publication of EP2856035B1 publication Critical patent/EP2856035B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/028—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs the glow plug being combined with or used as a sensor
    • 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
    • F23Q2007/002—Glowing plugs for internal-combustion engines with sensing means

Definitions

  • the invention relates to a pressure measuring glow plug for insertion into a cylinder head of an internal combustion engine having the features of the preamble of claim 1.
  • Such a Druckmessglühkerze is made WO 2007/096208 A1 in which a glow plug for igniting a combustion mixture of an internal combustion engine and a pressure measuring device with a pressure sensor for detecting a combustion chamber pressure of the internal combustion engine are arranged in a housing.
  • the glow plug is exposed to the combustion chamber pressure and transmits as a pressure transducer, the combustion chamber pressure on the pressure sensor, wherein the pressure sensor between the acting as a pressure transducer glow pin and a support member is received in a sensor housing.
  • a flexurally elastic membrane is arranged, which allows the required axial longitudinal movement of the glow pin for pressure transmission and at the same time applies the required biasing force for the pressure sensor.
  • the forces acting on the flexurally elastic membrane during assembly of the annealing and pressure measuring module also have an effect on the preload of the pressure sensor.
  • the invention with the characterizing features of claim 1 has the advantage that an annealing and pressure measuring module was provided, wherein the pressure sensor is biased by means of a clamping sleeve used in addition to the sensor housing between the pressure transmission piece and the support element becomes.
  • the biasing force for the pressure sensor during installation of the annealing and pressure measuring module in the housing of Druckmessglühkerze remains unaffected.
  • the clamping sleeve, the pressure transmitting piece, the support element and the pressure sensor surrounded by it form a preassembled sensor unit, which can be inserted into an end portion of the sensor housing facing away from the combustion chamber.
  • the sensor unit can be mounted independently of the annealing and pressure measuring module.
  • the forces acting on the flexurally elastic membrane during assembly thus do not affect the bias of the pressure sensor.
  • the support member receives its fixation fixed to the housing characterized in that the sensor housing is connected to an end portion facing away from the combustion chamber with the support element and at one end facing the combustion chamber with the housing of Druckmessglühkerze. As a result, the sensor unit is fixed fixed to the housing at the same time in the sensor housing.
  • the glow plug is connected to the sensor housing by means of the flexurally elastic membrane at an end section facing the combustion chamber.
  • a connecting sleeve is flanged to the pressure transmitting piece, which surrounds the glow plug on the end portion facing away from the combustion chamber and which is at least indirectly connected to the glow plug.
  • the connecting sleeve forms a receiving space for a glow current contact on the glow plug side, in which the glow current contact is contacted with a glow current conductor.
  • the Glühstromtechnisch is thereby guided by the sensor unit, to which the pressure transfer piece a first implementation and the support member having a second passage through which the Glühstromtechnisch is guided, wherein the Glühstrom effet is contacted with a lying outside the sensor unit high current connection.
  • the components connected to the sensor housing form an annealing and pressure measuring module, which can be used as a preassembled unit in the glow module housing of the Druckmessglühkerze.
  • the annealing and pressure measuring module is firmly connected by means of an attachment point formed on the sensor housing with the housing of the Druckmessglühkerze, wherein the attachment point is formed by a formed on the sensor housing support portion.
  • FIG. 1 illustrated Druckmessglühkerze combines a conventional glow plug 20 for use in auto-ignition internal combustion engine with an additional pressure measurement function of a pressure measuring device 30 for detecting a combustion chamber pressure of the internal combustion engine.
  • the pressure measuring glow plug essentially comprises an annealing and pressure measuring module 11, which is housed in a housing 13 of the Druckmessglühkerze, which is hereinafter referred to as Glühmodulgetude, and a non-illustrated connection module 14, which is housed in a terminal module housing 15.
  • connection module 14 two sensor connections 16 for the pressure measuring device 30 and a high-current connection 17 for the glow plug 20 are projecting into the glow module housing 13 and exposed there, which lead in the connection module 14 to not shown electrical connections for a connector.
  • a signal processing unit for the preprocessing of the signals of the pressure measuring device 30 may be integrated.
  • the components of the glow plug 20 for igniting the internal combustion engine and the components of the pressure measuring device 30 are housed for combustion chamber pressure measurement.
  • the glow plug 20 comprises a glow plug 21 protruding from the glow plug housing 13 on the combustion chamber side, which protrudes with the projecting part into the combustion chamber of the internal combustion engine and thereby simultaneously forms a pressure sensor for the pressure prevailing in the combustion chamber.
  • the glow plug 21 is in the present embodiment, a ceramic glow plug, in which an unillustrated electrical heating element is embedded.
  • the ceramic glow plug 21 is surrounded by a metallic support tube 22.
  • the heating element is connected to form a pole via an external contact with the support tube 22 and the formation of the other pole via an electrical connection 23 with a GlühstromWallet 24, wherein the GlühstromWallet 24 exposed as a solid terminal bolt with a side facing away from the combustion chamber end portion 25 is led out of the support tube 22.
  • the electrical connection from the GlühstromWallet 24 to the high current terminal 17 on the connection module 12 is realized by means of a Glühstromtechnisch 27.
  • an electrically insulating sealing element 29 is further arranged between support tube 22 and glow current contact 24, an electrically insulating sealing element 29 is further arranged.
  • the glow plug 21 is also conceivable to perform the glow plug 21 as a metallic glow tube with an embedded heating coil.
  • the pressure measuring device 30 is accommodated within the glow module housing 13 and comprises a sensor unit 40, a flexurally elastic membrane 32, a sensor housing 33 and a connecting sleeve 34.
  • the sensor unit 40 comprises a piezoelectric pressure sensor 41, a glow pin side pressure piece 42, a support element side pressure piece 43, a pressure transmission piece 44, a support member 45 and a clamping sleeve 46.
  • the clamping sleeve 46 is resilient in order to realize an axial movement of the pressure transmission piece 44 for the transmission of force to the pressure sensor 41 educated.
  • the clamping sleeve 46 is designed for example as a tubular spring.
  • the pressure pieces 41, 42 are made of an electrically insulating material.
  • the pressure sensor 41 is between the glow pin side pressure piece 42 and the support member side pressure piece 43 by means of a biasing force, by the clamping sleeve 46 is applied, positioned.
  • the pressure sensor 41 has two sensor lines 47, which are electrically connected to the two sensor terminals 16.
  • the pressure transmission piece 44 and the support member 45 are connected by means of the resilient clamping sleeve 46, such that on the one hand acts on the pressure sensor 41, the required bias and on the other hand, the pressure transmission piece 44 can perform the necessary for the transmission of force to the pressure sensor 41 axial movement.
  • the clamping sleeve 46 forms a separate clamping element for the pressure sensor 41 independently of the sensor housing 33.
  • the clamping sleeve 46 is connected to the pressure transmission piece 44 by means of a first weld 48 and the support member 45 by means of a second weld 49.
  • the sensor unit 40 forms a unit that can be preassembled separately from the annealing and pressure measuring module 11.
  • the sensor lines 47 are led out of the sensor unit 40 on the connection module side. These are in accordance with FIG. 2 in the support member 45, two passages 51 are provided, through which the two sensor lines 47 are guided to the sensor terminals 16 out.
  • the Glühstrom endeavor 27 is guided by the sensor unit 40.
  • the pressure transfer piece 44 has a first passage 52 for passing the Glühstromtechnisch 27 for GlühstromWallet 24 out and the support member 45 a second passage 53 for passing the Glühstrom réelle 27 to the high-current terminal 17 toward.
  • the Glühstrom réelle 27 guided substantially axially through the sensor unit 30 has a first 90 degree bend on the glow plug side and a second 90 degree bend on the connection side, so that the glow current line 27 can be guided axially through the sensor unit 40.
  • a radial bore is introduced into the connection-side end portion 25 of the GlühstromWallets 24, in which the first 90-degree bend of Glühstromtechnisch 27 introduced and contacted there is electrically.
  • the glow plug 21 is mounted axially displaceably in the glow module housing 13 by means of the flexurally elastic diaphragm 32. Furthermore, there is a power transmission from the glow plug 21 to the pressure transmission piece 44 of the sensor unit 40 instead.
  • the support tube 22 fixedly connected to the glow plug 21 is extended with the connection sleeve 34 axially in the direction of the sensor unit 40 with an end section 55.
  • the extended end portion 55 is placed on a formed on the pressure transmitting piece 44 collar and connected there by means of a first weld 56 with the pressure transmitting piece 44.
  • the support tube 22 and the connecting sleeve 34 are firmly connected by means of a second weld seam 57.
  • Within the end portion 55 thus forms a wood-cylindrical receiving space 58, in which the connection-side end portion 25 of the Glühstromnaps 24 is exposed and contacted there with the Glühstrom effet 27.
  • the flexurally elastic membrane 32 is connected to the sensor housing 33 by means of a third weld seam 59.
  • the sensor housing 33 is welded to the support element 45 by means of a fourth weld 61.
  • the second weld 49 for connecting the clamping sleeve 46 and the fourth weld 61 for connecting the Sensorgeophüses 33 are performed at different diameters of the support member 45.
  • annular gap 36 serves to provide a friction-free distance for the axial displacement of the connecting sleeve 34 and the resilient clamping sleeve 34 relative to the housing-fixed sensor housing 33.
  • an outer support portion 64 is formed on the sensor housing 33, which is adapted to the outer diameter of the glow module housing 13 with the outer diameter is.
  • the support portion 64 forms a connection point on the sensor housing 13, with which the sensor housing 33 is connected to the glow module housing 13 by means of another weld 62.
  • the further weld 62 and the third weld 59 are designed to seal circumferentially.
  • the bias voltage for the pressure sensor 41 is thus applied by the clamping sleeve 46 and not by the spring force of the flexurally elastic membrane 32.
  • the bias for the pressure sensor 41 outside the annealing and pressure measuring module 11 on the preassembled sensor unit 40 is adjustable.
  • the bias of the pressure sensor 41 is thereby not influenced by the spring force of the resilient membrane 32 and also not by the subsequent assembly steps in the insertion of the annealing and pressure measuring module 11 in the Glühmodulgephase 13.
  • the prevailing pressure in the combustion chamber which exerts a compressive force acting as a pressure transducer glow plug 21 causes due to the flexurally elastic membrane 32 of the glow plug 21 with the support tube 22 and the connecting sleeve 34 an axial movement relative to the firmly fixed in the cylinder head Glühmodulgephaseuse 13 along the Longitudinal axis of the Druckmessglühkerze performs.
  • the pressure force acts on the pressure transmission piece 44 and this presses due to the elastic effect of the clamping sleeve 46 via the first pressure piece 42 on the pressure sensor 41, which is supported via the second pressure piece 43 on the fixedly connected to the sensor housing 33 and thereby fixed support member 45.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)
EP13718861.1A 2012-05-31 2013-04-30 Druckmessglühkerze Not-in-force EP2856035B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012209237A DE102012209237A1 (de) 2012-05-31 2012-05-31 Druckmessglühkerze
PCT/EP2013/058958 WO2013178416A1 (de) 2012-05-31 2013-04-30 Druckmessglühkerze

Publications (2)

Publication Number Publication Date
EP2856035A1 EP2856035A1 (de) 2015-04-08
EP2856035B1 true EP2856035B1 (de) 2016-12-14

Family

ID=48190524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13718861.1A Not-in-force EP2856035B1 (de) 2012-05-31 2013-04-30 Druckmessglühkerze

Country Status (7)

Country Link
US (1) US9874195B2 (enrdf_load_stackoverflow)
EP (1) EP2856035B1 (enrdf_load_stackoverflow)
JP (1) JP5890938B2 (enrdf_load_stackoverflow)
CN (1) CN104508379B (enrdf_load_stackoverflow)
DE (1) DE102012209237A1 (enrdf_load_stackoverflow)
IN (1) IN2014DN09912A (enrdf_load_stackoverflow)
WO (1) WO2013178416A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015114811A1 (de) 2015-09-04 2017-03-09 Borgwarner Ludwigsburg Gmbh Druckmessglühkerze
DE102015224166A1 (de) 2015-12-03 2017-06-08 Robert Bosch Gmbh Sensorhalter für eine Druckmessglühkerze einer Brennkraftmaschine
DE102015224168A1 (de) 2015-12-03 2017-06-08 Robert Bosch Gmbh Vorrichtung zum Erfassen eines Brennraumdrucks in einem Brennraum einer Brennkraftmaschine
DE102015224169A1 (de) 2015-12-03 2017-06-08 Robert Bosch Gmbh Sensorhalter für eine Druckmessglühkerze einer Brennkraftmaschine
JP6686673B2 (ja) 2016-04-27 2020-04-22 株式会社デンソー 歪み検出センサ
DE102016114929B4 (de) * 2016-08-11 2018-05-09 Borgwarner Ludwigsburg Gmbh Druckmessglühkerze
CN114323661A (zh) * 2022-03-07 2022-04-12 江铃汽车股份有限公司 发动机缸内燃烧噪声测试分析方法及系统

Family Cites Families (24)

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Publication number Priority date Publication date Assignee Title
JP2559858Y2 (ja) * 1992-12-09 1998-01-19 日本特殊陶業株式会社 圧力センサ
JP3911930B2 (ja) * 1999-10-28 2007-05-09 株式会社デンソー 燃焼圧センサ付きグロープラグ
JP3912352B2 (ja) * 2002-10-07 2007-05-09 株式会社デンソー 燃焼圧センサ付きグロープラグ
DE10343521A1 (de) * 2003-09-19 2005-04-21 Beru Ag Druckmessglühkerze für einen Dieselmotor
JP4708711B2 (ja) * 2004-02-03 2011-06-22 株式会社デンソー 圧力センサ
ATE544034T1 (de) * 2004-09-15 2012-02-15 Beru Ag Druckmessglühkerze für einen dieselmotor
JP4903165B2 (ja) 2005-02-24 2012-03-28 キストラー ホールディング アクチエンゲゼルシャフト 電気絶縁皮膜によって保持された圧電式力センサ用部品又は圧電式圧力センサ用部品
DE102005016463A1 (de) 2005-04-11 2006-10-12 Robert Bosch Gmbh Glühstiftkerze mit integriertem Druckmesselement
FR2884299B1 (fr) 2005-04-12 2007-06-29 Siemens Vdo Automotive Sas Bougie de prechauffage a capteur de pression integre et corps d'une telle bougie de prechauffage
DE102005035062A1 (de) 2005-07-27 2007-02-15 Robert Bosch Gmbh Vorrichtung zur Erfassung des Brennraumdrucks einer Brennkraftmaschine
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Also Published As

Publication number Publication date
WO2013178416A1 (de) 2013-12-05
CN104508379B (zh) 2016-12-21
CN104508379A (zh) 2015-04-08
JP2015525334A (ja) 2015-09-03
US20150136054A1 (en) 2015-05-21
JP5890938B2 (ja) 2016-03-22
DE102012209237A1 (de) 2013-12-05
US9874195B2 (en) 2018-01-23
IN2014DN09912A (enrdf_load_stackoverflow) 2015-08-14
EP2856035A1 (de) 2015-04-08

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