US20080296281A1 - Glow Plug Containing a Combustion Chamber Pressure Sensor - Google Patents

Glow Plug Containing a Combustion Chamber Pressure Sensor Download PDF

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Publication number
US20080296281A1
US20080296281A1 US11/662,581 US66258105A US2008296281A1 US 20080296281 A1 US20080296281 A1 US 20080296281A1 US 66258105 A US66258105 A US 66258105A US 2008296281 A1 US2008296281 A1 US 2008296281A1
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US
United States
Prior art keywords
glow plug
recited
heating element
combustion chamber
channel
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.)
Abandoned
Application number
US11/662,581
Other languages
English (en)
Inventor
Oliver Glock
Christoph Kern
Steffen Schott
Jan Bahlo
Pavlo Saltikov
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
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAHLO, JAN, SCHOTT, STEFFEN, KERN, CHRISTOPH, SALTIKOV, PAVLO, GLOCK, OLIVER
Publication of US20080296281A1 publication Critical patent/US20080296281A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • F02P19/025—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 with means for determining glow plug temperature or glow plug resistance
    • 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 present invention relaters to a glow plug for an internal combustion engine, essentially including a plug housing and a glow element disposed in the plug housing, and further including a channel for measuring the combustion chamber pressure.
  • Diesel engines need a heat source to provide good starting and und warm-up performance at low temperatures. Such heat sources preheat either the gaseous mixture, the intake air, or the combustion chamber.
  • glow plugs include a plug housing and a glow element which protrudes from the plug housing and extends from the cylinder head into the combustion chamber of an internal combustion chamber when the glow plug is in the mounted position.
  • the glow elements of the glow plugs extend about 4 mm into the combustion chamber of the internal combustion engine and heat the Diesel-air mixture. The achieved temperature and afterglow time of the glow plug have a considerable influence on the emission performance and fuel consumption of the internal combustion engine.
  • the glow elements may be metallic heating tubes or ceramic glow elements.
  • Sensor-integrative concepts where a pressure sensor is disposed on or in the glow plug, have the advantage of eliminating the need to provide an additional bore in the internal combustion engine.
  • the fact that modern internal combustion engines have very limited space for mounting additional sensors makes this advantage even greater.
  • Pressure transfer between the combustion chamber and the sensor element is through a channel extending longitudinally through the entire glow plug housing.
  • the combustion chamber pressure is transmitted via an air column to the combustion chamber pressure sensor located on the side of the engine compartment.
  • Glow plugs which have an integrated pressure sensor and are based on the principle of transmitting the combustion chamber pressure via an air column can be susceptible to carbon deposits, because entry and accumulation of particles may affect the measurement.
  • the glow plug containing a combustion chamber pressure sensor according to the present invention has the advantage over the related art that the aforementioned shortcoming is avoided to a satisfactory extent.
  • the channel is able to be heated by at least one heating element, whereby the formation of carbon deposits in the channel during the operation of the glow plug is avoided or reduced to a tolerable degree, thereby ensuring the proper functioning of the combustion chamber pressure sensor.
  • a solution that is convenient from a standpoint of production engineering can be achieved by representing the channel using a profiled sleeve.
  • the sleeve is formed by an inner ring and an outer ring. This has the advantage that the heating element can be inserted in the transition area between the rings in a convenient manner from a production engineering point of view.
  • the channel may have a catalytic coating which reduces the burn-off temperature of the carbon deposits, thereby increasing the service life of the glow plug containing the combustion chamber pressure sensor.
  • the heating element is operated using mapping regulation, which leads to additional energy savings.
  • This temperature adjustment is accomplished by the interaction of the temperature sensor and the heater.
  • the sleeve contains a temperature sensor and, at the same time, is located near the combustion chamber, it is possible to also measure the temperature in the combustion chamber. This allows additional conclusions to be drawn about the course of the combustion process and may therefore be used to improve the emission performance.
  • FIG. 1 is a schematic view of the glow plug according to the present invention
  • FIG. 2 is a sectional detail view of the housing of this glow plug
  • FIG. 3 is a detail view of a sleeve of this glow plug
  • FIG. 4 is a cross-section through the sleeve and the housing of the glow plug.
  • FIG. 5 is a view showing an inner ring of the sleeve and the heater sintered therein.
  • FIG. 1 schematically shows a rudimentary glow plug 11 including a housing 13 , a glow element 17 , and a combustion chamber pressure sensor 19 in a sectional view.
  • Glow plug 11 is inserted into a rudimentarily shown cylinder head 14 of an internal combustion engine, in particular a Diesel engine, by an external thread 12 of a tubular housing 13 made of metal. Cylinder head 14 bounds a combustion chamber 16 of the internal combustion engine. A glow element 17 of glow plug 11 partially extends into combustion chamber 16 . Said glow element is secured in housing 13 by a sleeve 18 , which is shown in FIG. 3 . A combustion chamber pressure sensor 19 is disposed in housing 13 behind the end of sleeve 18 facing away from combustion chamber 16 . Combustion chamber pressure sensor 19 is connected to combustion chamber 16 by a channel 21 , such as is shown in FIGS.
  • Channel 21 extends approximately parallel to glow element 17 along an inner wall of housing 13 , so that the risk of deposits forming in channel 21 is kept low from the outset.
  • Sleeve 18 which is shown in FIG. 3 , is made from ceramic materials, but, alternatively, may also take the form of a metal part, and is provided on the outside with a profile in the form of grooves 22 along its entire length, said grooves extending parallel to a longitudinal axis 23 of glow plug 11 .
  • inner wall 24 of housing 13 may be provided with a suitable profile, and for sleeve 18 to have a smooth cylindrical shape on its outside, which may lead to cost advantages, depending on the manufacturing facilities.
  • sleeve 18 is provided with a heating element 26 capable of producing a burn-off temperature of at least 500° C. in channel 21 in order to prevent carbon deposits from forming in channel 21 during the operation of the internal combustion engine.
  • heating element 26 is sintered into sleeve 18 , as separately shown in FIG. 5 .
  • sleeve 18 has an inner ring 27 and a profiled outer ring 28 , as shown in FIG. 4 .
  • Heating element 26 which, according to FIG. 5 , preferably takes the form of a heating meander 29 , is embedded between these two rings 27 , 28 and may be electrically isolated from the two rings 27 , 28 if the material of sleeve 18 is electrically conductive.
  • heating element 26 is enabled to radiate heat in a substantially homogenous manner.
  • heating meander 29 could also be laminated in between two films using thick-film technology. This alternative manufacturing method may lead to cost advantages.
  • said channel may have a catalytic coating 31 .
  • heating element 26 can be operated permanently or cyclically. These two operating modes can be performed statically at a fixed temperature or dynamically in temporally fixed heating cycles. This allows adaptation to the mode of operation of a control unit for the internal combustion engine.
  • heating element 26 could also be operating using mapping regulation, so that, for example, the engine temperature or the current operating point of the internal combustion engine may be taken into account in the heating of channel 21 .
  • heating element 26 can be monitored by a temperature sensor 32 shown in FIG. 4 , which is sintered into outer ring 28 of sleeve 18 .
  • this monitoring could also be accomplished by monitoring the electrical resistance of heating element 26 .
  • heating element 26 is operated with switched current, and the temperature measurement for monitoring the electrical resistance of heating element 26 is performed in the intervals between the heating phases, so that the temperature measurement is decoupled from the operation of heating element 26 and is accurate.
  • channel 21 allows the combustion chamber pressure to be measured with the accuracy of the system, because the cross-sectional area of channel 21 cannot be obstructed and, therefore, remains constant. By preventing particulates from depositing on the sensitive diaphragm of combustion chamber pressure sensor 19 , its proper functioning can be maintained stable over a long period of time.

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)
  • Measuring Fluid Pressure (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
US11/662,581 2004-09-18 2005-07-18 Glow Plug Containing a Combustion Chamber Pressure Sensor Abandoned US20080296281A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004045383.7 2004-09-18
DE102004045383A DE102004045383A1 (de) 2004-09-18 2004-09-18 Glühkerze mit Brennraumdrucksensor
PCT/EP2005/053433 WO2006029923A1 (de) 2004-09-18 2005-07-18 Glühkerze mit brennraumdrucksensor

Publications (1)

Publication Number Publication Date
US20080296281A1 true US20080296281A1 (en) 2008-12-04

Family

ID=35004332

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/662,581 Abandoned US20080296281A1 (en) 2004-09-18 2005-07-18 Glow Plug Containing a Combustion Chamber Pressure Sensor

Country Status (5)

Country Link
US (1) US20080296281A1 (de)
EP (1) EP1794501A1 (de)
JP (1) JP4314303B2 (de)
DE (1) DE102004045383A1 (de)
WO (1) WO2006029923A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7581520B2 (en) * 2004-12-29 2009-09-01 Robert Bosch Gmbh Pencil-type glow plug having an integrated combustion chamber pressure sensor
US20110220073A1 (en) * 2010-03-11 2011-09-15 Borgwarner Beru Systems Gmbh Method for controlling a glow plug
US8479697B2 (en) 2007-09-19 2013-07-09 Borgwarner Beru Systems Gmbh Glow plug having coking-optimized design
US20150275752A1 (en) * 2014-03-25 2015-10-01 Kabushiki Kaisha Toyota Jidoshokki Device for controlling in-cylinder pressure sensor
US20180112874A1 (en) * 2015-04-21 2018-04-26 Bosch Corporation Glow plug
US10244583B2 (en) 2014-05-16 2019-03-26 Ngk Spark Plug Co., Ltd. Glow plug with combustion pressure sensor
US20220372916A1 (en) * 2018-09-12 2022-11-24 Pratt & Whitney Canada Corp. Igniter for gas turbine engine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013020998A1 (de) 2013-12-12 2014-07-31 Daimler Ag Brennraumdrucksensor zum Erfassen eines Drucks in einem Brennraum einer Verbrennungskraftmaschine
DE102016226018A1 (de) 2016-12-22 2018-06-28 Robert Bosch Gmbh Glühkerze mit einem Brennraumdrucksensor für eine Brennkraftmaschine
DE102017216121A1 (de) * 2017-09-13 2019-03-14 Volkswagen Aktiengesellschaft Verfahren zum Betreiben eines Verbrennungsmotors sowie Verbrennungsmotor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7270099B2 (en) * 2003-01-14 2007-09-18 Siemens Vdo Automotive Pressure gauge for combustion chamber of an internal combustion engine
US7350494B2 (en) * 2006-04-20 2008-04-01 Piezocryst Advanced Sensorics Gmbh Glow plug with integrated pressure sensor
US7635826B2 (en) * 2006-06-14 2009-12-22 Ngk Spark Plug Co., Ltd. Glow plug having built-in sensor
US7825352B2 (en) * 2004-04-27 2010-11-02 Continental Automotive France Glow plug provided with a pressure sensor
US7829824B2 (en) * 2005-10-28 2010-11-09 Beru Ag Pressure pickup heating bar, in particular for a pressure pickup glow plug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4132842A1 (de) * 1991-10-02 1993-04-08 Beru Werk Ruprecht Gmbh Co A Gluehkerze mit sensorelement
JP3691649B2 (ja) * 1997-10-28 2005-09-07 日本特殊陶業株式会社 セラミックヒータ
JP3900059B2 (ja) * 2002-10-07 2007-04-04 株式会社デンソー 燃焼センサ付きグロープラグおよび燃焼圧センサ付きグロープラグの取付構造ならびに取付方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7270099B2 (en) * 2003-01-14 2007-09-18 Siemens Vdo Automotive Pressure gauge for combustion chamber of an internal combustion engine
US7825352B2 (en) * 2004-04-27 2010-11-02 Continental Automotive France Glow plug provided with a pressure sensor
US7829824B2 (en) * 2005-10-28 2010-11-09 Beru Ag Pressure pickup heating bar, in particular for a pressure pickup glow plug
US7350494B2 (en) * 2006-04-20 2008-04-01 Piezocryst Advanced Sensorics Gmbh Glow plug with integrated pressure sensor
US7635826B2 (en) * 2006-06-14 2009-12-22 Ngk Spark Plug Co., Ltd. Glow plug having built-in sensor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7581520B2 (en) * 2004-12-29 2009-09-01 Robert Bosch Gmbh Pencil-type glow plug having an integrated combustion chamber pressure sensor
US8479697B2 (en) 2007-09-19 2013-07-09 Borgwarner Beru Systems Gmbh Glow plug having coking-optimized design
US20110220073A1 (en) * 2010-03-11 2011-09-15 Borgwarner Beru Systems Gmbh Method for controlling a glow plug
CN102192070A (zh) * 2010-03-11 2011-09-21 博格华纳贝鲁系统有限公司 一种控制电热塞的方法
US8656898B2 (en) * 2010-03-11 2014-02-25 Borgwarner Beru Systems Gmbh Method for controlling a glow plug
US20150275752A1 (en) * 2014-03-25 2015-10-01 Kabushiki Kaisha Toyota Jidoshokki Device for controlling in-cylinder pressure sensor
US9790854B2 (en) * 2014-03-25 2017-10-17 Toyota Jidosha Kabushiki Kaisha Device for controlling in-cylinder pressure sensor
US10244583B2 (en) 2014-05-16 2019-03-26 Ngk Spark Plug Co., Ltd. Glow plug with combustion pressure sensor
US20180112874A1 (en) * 2015-04-21 2018-04-26 Bosch Corporation Glow plug
US20220372916A1 (en) * 2018-09-12 2022-11-24 Pratt & Whitney Canada Corp. Igniter for gas turbine engine
US11614034B2 (en) * 2018-09-12 2023-03-28 Pratt & Whitney Canada Corp. Igniter for gas turbine engine

Also Published As

Publication number Publication date
DE102004045383A1 (de) 2006-03-23
EP1794501A1 (de) 2007-06-13
WO2006029923A1 (de) 2006-03-23
JP4314303B2 (ja) 2009-08-12
JP2008513717A (ja) 2008-05-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GLOCK, OLIVER;KERN, CHRISTOPH;SCHOTT, STEFFEN;AND OTHERS;REEL/FRAME:020631/0150;SIGNING DATES FROM 20070417 TO 20070503

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION