EP2284444A2 - Glow plug - Google Patents
Glow plug Download PDFInfo
- Publication number
- EP2284444A2 EP2284444A2 EP10007778A EP10007778A EP2284444A2 EP 2284444 A2 EP2284444 A2 EP 2284444A2 EP 10007778 A EP10007778 A EP 10007778A EP 10007778 A EP10007778 A EP 10007778A EP 2284444 A2 EP2284444 A2 EP 2284444A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- glow plug
- housing
- plug according
- substance
- heating element
- 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.)
- Withdrawn
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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
- 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
- F23Q2007/002—Glowing plugs for internal-combustion engines with sensing means
Definitions
- the invention relates to a glow plug with the features specified in the preamble of claim 1.
- a glow plug is from the WO 2005/090865 A1 known.
- Object of the present invention is to show a way how the combustion chamber pressure of a diesel engine by means of a pressure measuring device of a glow plug with greater accuracy can be measured.
- a substance is introduced into a sealed housing interior, which at the temperatures occurring there during operation of liquid to pasty consistency is or will and directs heat generated by the heating element to the housing.
- the heating element is thermally coupled better to the housing.
- the material filled in the housing interior must not prevent an axial movement of the heating element. It is therefore important that the material used is or will be of liquid to pasty consistency at the operating temperatures. It does not hurt if the filled material solidifies with the engine stopped, since pressure measurements are anyway made only when the engine is running.
- the glow plug heats up so that the material used for heat dissipation becomes liquid or pasty.
- the substance used for heat dissipation is preferably liquid or pasty at 100 ° C., more preferably over the entire range of use of -40 ° C. and 400 ° C.
- Suitable examples are organic or organosilicon substances of waxy or oily consistency.
- Oils in particular mineral oils and silicone oils, have an advantageously low viscosity at the temperatures which occur in the interior of a glow plug when the engine is running, so that axial movements of the heating element in the relevant temperature range are hindered, if at all, immaterial.
- the oils used may be liquid or pasty at room temperature, but this is not essential. It does not hurt if the oils used have a waxy consistency at room temperature and liquefy or become pasty only at temperatures of 100 ° C or more.
- the heating element in a front part of the housing may also be surrounded by a metal which liquefies at such temperatures, for example a soft solder, an alkali metal, especially sodium, or their compounds.
- Soft solders such as tin / lead alloys and / or indium alloys, have good thermal conductivity and therefore can dissipate heat from a rear portion of the heater rod to the housing. Since the outside of the heating element is usually grounded in both ceramic and metallic heating elements, electrical insulation of the heating element relative to the housing is not necessary. The electrical conductivity of a heating rod in the housing surrounding soft solder is therefore not a disadvantage.
- the substance used to improve the heat dissipation is filled in a housing chamber which is closed by a seal.
- the interior of the housing chamber extends between the seal and a measuring diaphragm.
- the housing chamber which contains the material used to improve the heat dissipation, filled to at least 50%.
- glow plug has a housing 1 with an external thread 2 for screwing into an engine block. From a front end of the housing 1 protrudes a heating element 3, which is movable in the housing 1 in the axial direction.
- the combustion chamber pressure acting on the heating rod 3 can be measured with a pressure measuring device, which in the illustrated embodiment has a measuring diaphragm 4 which is fastened to the housing 1, for example by being clamped between a front and a rear housing part.
- the Measuring diaphragm 4 divides the housing interior into a front compartment and a rear compartment.
- the measuring diaphragm 4 is preferably fastened with its inner circumference to the heating rod 3.
- the measuring membrane 4 could also be attached to an inner pole 5, via which the heating element 3 is supplied with power during operation.
- the inner pole 5 may be executed in the illustrated embodiment as a rod or strand.
- the inner pole 5 is enclosed by an insulating sleeve 8.
- This movement of the heating element 3 can be used for a pressure measurement.
- an axial movement of the heating element 3 leads to a deformation of the measuring diaphragm 4, which generates a restoring force.
- This deformation can be detected with one or more measuring elements 6 carried by the measuring diaphragm 4, for example strain gauges.
- the measuring elements 6 are preferably arranged on the rear end of the housing 1 facing side of the measuring diaphragm 4.
- the measuring signals generated by the one or more measuring elements can be processed with an electronic module, not shown, before they are transmitted with (not shown) extending at the inner pole 5 along signal lines.
- a housing interior is filled with an organic or silicon-organic substance 7 of waxy or oily consistency, which dissipates heat from the heating element 3 to the housing 1.
- an organic or silicon-organic substance 7 of waxy or oily consistency, which dissipates heat from the heating element 3 to the housing 1.
- a rear part of the housing 1 between the measuring diaphragm 4 and a sealed rear end of the housing with silicone oil 7 is filled.
- the silicone oil 7 surrounds the inner pole 5 leading to the heating element 3 and dissipates heat from the rear end of the heating element 3 and the measuring membrane 4.
- FIG. 2 shows a further embodiment of a glow plug is shown, which differs from the embodiment described above only in that a front part of the space inside the chamber is filled with a heat conductive material 9.
- the housing 1 is closed at its front end with a seal 10, which may be formed, for example, as a fixed to the heating element 3 and the housing 1 membrane.
- the metal membrane used as a seal 10 can be soldered to a ceramic heating element 3 or its metallic protective sleeve can be welded.
- the metal membrane used as the seal 10 is preferably welded, but may also be soldered. If a metallic heating element is used instead of a ceramic heating element, the metal membrane can be welded to the heating element 3.
- the metal diaphragm can also be formed integrally with the housing or the housing part 1a.
- the surrounding the heating element 3 fabric 9 is at least at the occurring in operation in the front housing part 1 a temperatures of more than 200 ° C, preferably already at 100 ° C, of liquid or pasty consistency, preferably liquid, and conducts heat from the heating element. 3 to the surrounding housing from 1, 1a without an axial movement of the heating element 3 to prevent.
- Many indium alloys, in particular indium-bismuth alloys, for example In51Bi32.5Sn16.5, have melting points of considerably less than 100 ° C.
- the available space or partial space in the interior of the housing 1 is only partially filled with the heat-conducting substance 7, 9 and always contains also some air.
- FIG. 2 It can be seen that the partial space between the seal 10 at the front end of the housing 1 and the measuring diaphragm 4 only partially with the heat-conducting Fabric 9 is filled.
- the filling level can be between 20% and 95%. Filling levels of 50% to 95% are preferred.
- the rear subspace is also included FIG. 1 preferably only partially filled with the heat-conducting substance 7.
- FIG. 1 are a corresponding air bubble and a seal at the rear end of the housing 1 for the sake of simplicity not shown.
- thermally conductive material 7 and 9 is filled in both the rear part of the housing 1 and in the front part of the housing 1.
- different substances are preferably used for the front and the rear subspace.
- An electrically insulating oil in particular a silicone oil, is preferably used for the front partial space.
- electrically insulating properties are insignificant and for a higher temperature resistance required.
- the heat dissipation from the heating element 3 to the surrounding housing 1 can be achieved in the case of the FIG. 1 illustrated embodiment also be improved in that between the heating element 3 and the housing 1, a ring or a sleeve are arranged made of an elastomer, for example, a perfluoroelastomer.
- elastomer for example, a perfluoroelastomer.
- Perfluoroelastomers advantageously combine high temperature resistance with a low coefficient of friction.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Fluid Pressure (AREA)
- Fats And Perfumes (AREA)
Abstract
Description
Die Erfindung geht aus von einer Glühkerze mit den im Oberbegriff des Anspruchs 1 angegebenen Merkmalen. Eine derartige Glühkerze ist aus der
Aufgabe der vorliegenden Erfindung ist es, einen Weg aufzuzeigen, wie der Brennraumdruck eines Dieselmotors mittels einer Druckmesseinrichtung einer Glühkerze mit größerer Genauigkeit gemessen werden kann.Object of the present invention is to show a way how the combustion chamber pressure of a diesel engine by means of a pressure measuring device of a glow plug with greater accuracy can be measured.
Diese Aufgabe wird durch eine Glühkerze mit den im Anspruch 1 angegebenen Merkmalen gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand von Unteransprüchen.This object is achieved by a glow plug having the features specified in
Bei einer erfindungsgemäßen Glühkerze ist in einen abgedichteten Gehäuseinnenraum ein Stoff eingefüllt, der bei den dort im Betrieb auftretenden Temperaturen von flüssiger bis pastöser Konsistenz ist oder wird und von dem Heizstab erzeugte Wärme an das Gehäuse leitet. Auf diese Weise wird der Heizstab thermisch besser an das Gehäuse angekoppelt. Überraschenderweise lässt sich dadurch eine deutliche Verbesserung der Messgenauigkeit erzielen. Im Rahmen der Erfindung wurde nämlich festgestellt, dass durch unterschiedliche thermische Ausdehnungen von Gehäuse und Heizstab druckunabhängige axiale Bewegungen des Heizstabs entstehen können, welche die Druckmessung verfälschen. Durch einen in eine Gehäusekammer eingefüllten Stoff können Temperaturgradienten zwischen dem Heizstab und dem Gehäuse abgebaut werden, so dass diese Fehlerquelle reduziert wird.In a glow plug according to the invention, a substance is introduced into a sealed housing interior, which at the temperatures occurring there during operation of liquid to pasty consistency is or will and directs heat generated by the heating element to the housing. In this way, the heating element is thermally coupled better to the housing. Surprisingly, this makes it possible to achieve a significant improvement in the measurement accuracy. In the context of the invention, it has been found that, due to different thermal expansions of the housing and the heating element, pressure-independent axial movements of the heating element can occur which falsify the pressure measurement. By a filled in a housing chamber material temperature gradients between the heating element and the housing can be reduced, so that this source of error is reduced.
Der in den Gehäuseinnenraum eingefüllte Stoff darf eine axiale Bewegung des Heizstabs nicht verhindern. Es ist deshalb wichtig, dass der verwendete Stoff bei den im Betrieb auftretenden Temperaturen von flüssiger bis pastöser Konsistenz ist oder wird. Es schadet nicht, wenn der eingefüllte Stoff bei stillstehendem Motor erstarrt, da Druckmessungen ohnehin nur bei laufendem Motor vorgenommen werden. Bei laufendem Motor erwärmt sich die Glühkerze, so dass der zur Wärmeableitung verwendete Stoff flüssig oder pastös wird. Bevorzugt ist der zur Wärmeableitung verwendete Stoff bei 100°C, besonders bevorzugt bei über den gesamten Einsatzbereich von -40°C und 400°C, flüssig oder pastös.The material filled in the housing interior must not prevent an axial movement of the heating element. It is therefore important that the material used is or will be of liquid to pasty consistency at the operating temperatures. It does not hurt if the filled material solidifies with the engine stopped, since pressure measurements are anyway made only when the engine is running. When the engine is running, the glow plug heats up so that the material used for heat dissipation becomes liquid or pasty. The substance used for heat dissipation is preferably liquid or pasty at 100 ° C., more preferably over the entire range of use of -40 ° C. and 400 ° C.
Geeignet sind beispielsweise organische oder siliziumorganische Stoffe von wachsartiger oder öliger Konsistenz. Öle, insbesondere Mineralöle und Silikonöle, haben bei den Temperaturen, die im Innenraum einer Glühkerze bei laufendem Motor auftreten, eine vorteilhaft geringe Viskosität, so dass axiale Bewegungen des Heizstabs in dem relevanten Temperaturbereich allenfalls unwesentlich behindert werden. Die verwendeten Öle können bei Raumtemperatur flüssig oder pastös sein, jedoch ist dies nicht unbedingt erforderlich. Es schadet nicht, wenn die verwendeten Öle bei Raumtemperatur eine wachsartige Konsistenz haben und sich erst bei Temperaturen von 100°C oder mehr verflüssigen oder pastös werden.Suitable examples are organic or organosilicon substances of waxy or oily consistency. Oils, in particular mineral oils and silicone oils, have an advantageously low viscosity at the temperatures which occur in the interior of a glow plug when the engine is running, so that axial movements of the heating element in the relevant temperature range are hindered, if at all, immaterial. The oils used may be liquid or pasty at room temperature, but this is not essential. It does not hurt if the oils used have a waxy consistency at room temperature and liquefy or become pasty only at temperatures of 100 ° C or more.
Bei laufendem Motor können in einem vorderen, brennraumseitigen Gehäuseabschnitt Temperaturen im Bereich von 100° bis 400°C auftreten. Zur Wärmeableitung kann deshalb der Heizstab in einem vorderen Teil des Gehäuses auch von einem Metall umgeben sein, das sich bei derartigen Temperaturen verflüssigt, beispielsweise einem Weichlot, einem Alkalimetall, insbesondere Natrium, oder deren Verbindungen. Weichlote, beispielsweise Zinn/Blei-Legierungen und/oder Indiumlegierungen, haben eine gute Wärmeleitfähigkeit und können deshalb Wärme von einem hinteren Bereich des Heizstabs an das Gehäuse ableiten. Da sowohl bei keramischen als auch metallischen Heizstäben die Außenseite des Heizstabs in der Regel auf Masse gelegt wird, ist eine elektrische Isolierung des Heizstabs gegenüber dem Gehäuse nicht notwendig. Die elektrische Leitfähigkeit eines den Heizstab in dem Gehäuse umgebenden Weichlots stellt deshalb keinen Nachteil dar.When the engine is running, temperatures in the range of 100 ° to 400 ° C may occur in a front, combustion-chamber-side housing section. For heat dissipation, therefore, the heating element in a front part of the housing may also be surrounded by a metal which liquefies at such temperatures, for example a soft solder, an alkali metal, especially sodium, or their compounds. Soft solders, such as tin / lead alloys and / or indium alloys, have good thermal conductivity and therefore can dissipate heat from a rear portion of the heater rod to the housing. Since the outside of the heating element is usually grounded in both ceramic and metallic heating elements, electrical insulation of the heating element relative to the housing is not necessary. The electrical conductivity of a heating rod in the housing surrounding soft solder is therefore not a disadvantage.
Bevorzugt ist der zur Verbesserung der Wärmeableitung verwendete Stoff in eine Gehäusekammer eingefüllt, die von einer Dichtung verschlossen ist. Besonders bevorzugt erstreckt sich der Innenraum der Gehäusekammer zwischen der Dichtung und einer Messmembran.Preferably, the substance used to improve the heat dissipation is filled in a housing chamber which is closed by a seal. Particularly preferably, the interior of the housing chamber extends between the seal and a measuring diaphragm.
Bevorzugt ist die Gehäusekammer, welche den zur Verbesserung der Wärmeableitung verwendete Stoff enthält, zu mindestens 50 % gefüllt.Preferably, the housing chamber, which contains the material used to improve the heat dissipation, filled to at least 50%.
Weitere Einzelheiten und Vorteile der Erfindung werden an Ausführungsbeispielen unter Bezugnahme auf die beigefügten Zeichnungen erläutert. Gleiche und einander entsprechende Teile sind dabei mit übereinstimmenden Bezugszahlen bezeichnet. Es zeigen:
Figur 1- eine schematische Darstellung eines Ausführungsbeispiels einer erfin- dungsgemäßen Glühkerze; und
Figur 2- ein weiteres Ausführungsbeispiel einer Glühkerze.
- FIG. 1
- a schematic representation of an embodiment of an inventive glow plug; and
- FIG. 2
- Another embodiment of a glow plug.
Die in
Je größer der auf den Heizstab 3 einwirkende Brennraumdruck ist, desto weiter wird der Heizstab 3 gegen eine Rückstellkraft in das Gehäuse 1 hineingedrückt. Diese Bewegung des Heizstabs 3 kann für eine Druckmessung genutzt werden. Bei dem dargestellten Ausführungsbeispiel führt eine axiale Bewegung des Heizstabs 3 zu einer Verformung der Messmembran 4, die eine Rückstellkraft erzeugt. Diese Verformung kann mit einem oder mehreren von der Messmembran 4 getragenen Messelementen 6, beispielsweise Dehnungsmessstreifen, erfasst werden. Die Messelemente 6 sind bevorzugt auf der dem hinteren Ende des Gehäuses 1 zugewandten Seite der Messmembran 4 angeordnet. Die von dem oder den Messelementen erzeugten Messsignale können mit einem nicht dargestellten Elektronikmodul aufbereitet werden, bevor diese mit an dem Innenpol 5 entlang verlaufenden Signalleitungen (nicht dargestellt) übertragen werden.The larger the combustion chamber pressure acting on the
Unterschiedliche thermische Ausdehnungen des Heizstabs 3 und des umgebenden Gehäuses 1 können ebenfalls zu einer Verformung der Messmembran 4 führen und somit die Druckmessung verfälschen. Um dem entgegenzuwirken, ist ein Gehäuseinnenraum mit einem organischen oder silizium-organischen Stoff 7 von wachsartiger oder öliger Konsistenz gefüllt, der Wärme von dem Heizstab 3 an das Gehäuse 1 ableitet. Bei dem in
In
Der in den vorderen Teil des Gehäuses 1 eingefüllte Stoff 9, der den Heizstab 3 umgibt, kann beispielsweise ein Mineralöl oder ein niedrig schmelzendes Metall, beispielsweise ein Weichlot oder ein Alkalimetall sein. Der den Heizstab 3 umgebende Stoff 9 ist zumindest bei den im Betrieb im vorderen Gehäuseteil 1 a auftretenden Temperaturen von mehr als 200°C, bevorzugt bereits bei 100°C, von flüssiger oder pastöser Konsistenz, vorzugsweise flüssig, und leitet Wärme von dem Heizstab 3 an das umgebende Gehäuse ab 1, 1a ohne eine axiale Bewegung des Heizstabs 3 zu verhindern. Viele Indiumlegierungen, insbesondere Indium-Wismut Legierungen, beispielsweise In51Bi32,5Sn16,5, haben Schmelzpunkte von deutlich weniger als 100 °C.The stuffed 9 in the front part of the
Damit eine thermische Ausdehnung des zur Wärmeableitung in den Gehäuseinnenraum eingefüllten Stoffs 7, 9 nicht zu einer Verfälschung der Druckmessung führt, ist mit dem wärmeleitenden Stoff 7, 9 der zur Verfügung stehende Raum bzw. Teilraum im Inneren des Gehäuses 1 nur teilweise gefüllt und enthält stets auch etwas Luft. In
Die in den
Die Wärmeabfuhr von dem Heizstab 3 zu dem umgebenden Gehäuse 1 kann bei dem in
- 11
- Gehäusecasing
- 1 a1 a
- Gehäuseteilhousing part
- 22
- Außengewindeexternal thread
- 33
- Heizstabheater
- 44
- Messmembranmeasuring membrane
- 55
- Innenpolpole
- 66
- DehnungsmessstreifenStrain gauges
- 77
- Stoffmaterial
- 88th
- Isolationshülseinsulation sleeve
- 99
- Stoffmaterial
- 1010
- Dichtungpoetry
Claims (15)
einem Gehäuse (1),
einem Heizstab (3), der in dem Gehäuse (1) in axialer Richtung beweglich ist und aus dem Gehäuse (1) an einem vorderen Ende herausragt, und
einer Druckmesseinrichtung (4, 6) zum Messen eines auf den Heizstab (3) einwirkenden Brennraumdrucks,
dadurch gekennzeichnet, dass in einen abgedichteten Gehäuseinnenraum ein Stoff (7, 9) eingefüllt ist, der bei den im Betrieb auftretenden Temperaturen von flüssiger bis pastöser Konsistenz ist oder es wird und von dem Heizstab (3) erzeugte Wärme an das Gehäuse (1) leitet.Glow plug for diesel engines, with
a housing (1),
a heater rod (3) which is movable in the housing (1) in the axial direction and protrudes from the housing (1) at a front end, and
a pressure measuring device (4, 6) for measuring a combustion chamber pressure acting on the heating element (3),
characterized in that in a sealed housing interior, a substance (7, 9) is filled, which is at the temperatures occurring during operation of liquid to pasty consistency or it is and from the heating element (3) generated heat to the housing (1) passes ,
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009037375A DE102009037375B3 (en) | 2009-08-12 | 2009-08-12 | glow plug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2284444A2 true EP2284444A2 (en) | 2011-02-16 |
EP2284444A3 EP2284444A3 (en) | 2012-01-04 |
Family
ID=43416211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10007778A Withdrawn EP2284444A3 (en) | 2009-08-12 | 2010-07-27 | Glow plug |
Country Status (6)
Country | Link |
---|---|
US (1) | US8389904B2 (en) |
EP (1) | EP2284444A3 (en) |
JP (1) | JP2011038761A (en) |
KR (1) | KR20110016830A (en) |
DE (1) | DE102009037375B3 (en) |
RU (1) | RU2010133110A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5854638B2 (en) * | 2011-05-19 | 2016-02-09 | 株式会社ミクニ | Glow plug |
JP6370663B2 (en) * | 2014-10-09 | 2018-08-08 | 日本特殊陶業株式会社 | Glow plug |
EP3285004A4 (en) * | 2015-04-15 | 2018-03-28 | Bosch Corporation | Glow plug |
DE102016114929B4 (en) * | 2016-08-11 | 2018-05-09 | Borgwarner Ludwigsburg Gmbh | pressure measuring glow |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005090865A1 (en) | 2004-03-16 | 2005-09-29 | Robert Bosch Gmbh | Sheathed-element heater plug comprising an elastically mounted heater plug |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE658420C (en) * | 1936-04-04 | 1938-04-02 | Fritz Zeiss Dipl Ing | Spark plug and glow plug for air-cooled combustion engines |
US4499366A (en) * | 1982-11-25 | 1985-02-12 | Nippondenso Co., Ltd. | Ceramic heater device |
DE3837128C2 (en) * | 1987-11-05 | 1993-11-18 | Hitachi Metals Ltd | Glow plug for diesel engines |
US6575138B2 (en) * | 1999-10-15 | 2003-06-10 | Westport Research Inc. | Directly actuated injection valve |
AT5153U1 (en) * | 2001-03-22 | 2002-03-25 | Avl List Gmbh | OPTICAL SENSOR FOR DETECTING COMBUSTION |
AU2004235350B8 (en) * | 2003-04-24 | 2013-03-07 | Shell Internationale Research Maatschappij B.V. | Thermal processes for subsurface formations |
JP4316474B2 (en) * | 2004-11-02 | 2009-08-19 | 株式会社デンソー | Combustion chamber pressure detector |
DE102005016463A1 (en) * | 2005-04-11 | 2006-10-12 | Robert Bosch Gmbh | Glow plug with integrated pressure measuring element |
DE102005061879A1 (en) * | 2005-12-23 | 2007-07-05 | Robert Bosch Gmbh | Glowplug for engine pressure measurement has sealed cavity bounding end aperture of housing and containing sealant |
JP2007309916A (en) * | 2006-04-20 | 2007-11-29 | Denso Corp | Combustion pressure sensor |
JP2008020176A (en) * | 2006-06-14 | 2008-01-31 | Ngk Spark Plug Co Ltd | Glow plug with built-in sensor |
-
2009
- 2009-08-12 DE DE102009037375A patent/DE102009037375B3/en not_active Expired - Fee Related
-
2010
- 2010-07-21 JP JP2010163721A patent/JP2011038761A/en active Pending
- 2010-07-27 EP EP10007778A patent/EP2284444A3/en not_active Withdrawn
- 2010-08-09 RU RU2010133110/06A patent/RU2010133110A/en not_active Application Discontinuation
- 2010-08-10 US US12/853,819 patent/US8389904B2/en not_active Expired - Fee Related
- 2010-08-11 KR KR1020100077124A patent/KR20110016830A/en not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005090865A1 (en) | 2004-03-16 | 2005-09-29 | Robert Bosch Gmbh | Sheathed-element heater plug comprising an elastically mounted heater plug |
Also Published As
Publication number | Publication date |
---|---|
RU2010133110A (en) | 2012-02-20 |
US20110062136A1 (en) | 2011-03-17 |
EP2284444A3 (en) | 2012-01-04 |
US8389904B2 (en) | 2013-03-05 |
JP2011038761A (en) | 2011-02-24 |
DE102009037375B3 (en) | 2011-03-03 |
KR20110016830A (en) | 2011-02-18 |
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