EP2601497A1 - Dispositif pour détecter une pression de chambre de combustion d'un moteur à combustion interne - Google Patents

Dispositif pour détecter une pression de chambre de combustion d'un moteur à combustion interne

Info

Publication number
EP2601497A1
EP2601497A1 EP11733844.2A EP11733844A EP2601497A1 EP 2601497 A1 EP2601497 A1 EP 2601497A1 EP 11733844 A EP11733844 A EP 11733844A EP 2601497 A1 EP2601497 A1 EP 2601497A1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
housing
pressure transducer
mechanical
pressure
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Withdrawn
Application number
EP11733844.2A
Other languages
German (de)
English (en)
Inventor
Holger Scholzen
Janpeter Wolff
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 EP2601497A1 publication Critical patent/EP2601497A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
    • G01L23/10—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by pressure-sensitive members of the piezoelectric type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
    • G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
    • G01L23/222—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines using piezoelectric devices

Definitions

  • combustion chamber pressure sensors in which the combustion chamber pressure sensor is integrated in a glow plug are known from the prior art.
  • the integration into engine components is also discussed in principle, for example, in a spark plug, but such integration in gasoline engines with significant disadvantages, especially in the
  • a device for detecting a combustion chamber pressure of an internal combustion engine which can be used in particular in gasoline engines or gasoline engines.
  • a combustion chamber facing the opening of a sensor housing is closed by a membrane.
  • a mechanical-electrical transducer element is accommodated, and there is provided a transmission element for transmitting a deformation of the membrane to the mechanical-electrical transducer element.
  • Internal combustion engine has at least one housing, an adapter element accommodated in the housing and a mechanical-electrical housing arranged in the housing
  • the adapter element is operatively connected to a pressure transducer and at least one transmission element and comprises a stationary element connected to the housing and a movable element, wherein the movable element of the pressure transducer engages, and wherein the movable member is adapted to a by the combustion chamber pressure on the Pressure Transducer applied force at least partially transmitted to the mechanical-electrical transducer element.
  • a ring-shaped flexurally elastic web is formed, which ensures the relative movement of the movable element as a flexible membrane.
  • a mechanical-electrical transducer element is generally to be understood as an element which can convert mechanical effects, for example a force and / or a pressure effect and / or a change in length of the transducer element, into electrical signals.
  • mechanical effects for example a force and / or a pressure effect and / or a change in length of the transducer element.
  • the mechanical-electrical transducer element can also be other types of
  • a sensor housing is generally understood to mean an element which may be designed in one piece or also in several parts and which completely or partially surrounds the device or closes it to the outside.
  • the sensor housing can in particular the outer shape of the device determine and can protect the device by a suitable mechanical stability, in particular from mechanical damage or mechanical and / or chemical and / or electrical influences.
  • the sensor housing may further include one or more fasteners to fix the device, for example, in a wall of a combustion chamber of the internal combustion engine, for example, one or more threads.
  • a pressure transducer is generally to understand an element which is adapted to receive a force, pressure or deformation, which are caused by the pressure and / or pressure changes in the interior of the combustion chamber, and to the device, in particular directly or indirectly to the mechanical-electrical transducer element to forward.
  • the adapter element is configured to move one through the combustion chamber pressure to the
  • the movable element is designed as a sleeve with a first end face formed on a combustion chamber side opening and with a second end face formed on an inner side opening, wherein the pressure sensor can be fully or partially inserted into the combustion chamber side opening, so that the sleeve encloses the pressure transducer or a part of the pressure transducer.
  • the pressure transducer may have a projection, for example a cylindrical projection, in particular a circular cylindrical projection, which is completely or partially enclosed by the receptacle or a part of the receptacle. For example, at the transition between the transition between the
  • Projection and the remaining part of the pressure transducer shoulder be provided to a defined insertion of the pressure transducer in the
  • the receptacle may also be one or more differently shaped
  • the pressure sensor may comprise a glow module, so that the device as a whole can be configured as a glow plug.
  • a glow module is a module to understand how it is in self-igniting
  • Internal combustion engines can be used, for example in diesel engines, to effect or promote auto-ignition of the internal combustion engine,
  • the glow module may in particular comprise one or more Glühstrom füren, by means of which a heating of the Glühmoduls is effected.
  • the glow module may in particular be connected to the receptacle in such a way that the glow module protrudes completely or partially out of the receptacle into the combustion chamber.
  • the device can as
  • Pressure sensor also include at least one sensor tip. Under one
  • Sensor tip is basically to understand a pressure transducer, which, preferably without other functions of electrical type exhibited, is adapted to receive pressures and / or forces from the combustion chamber for their forwarding.
  • the sensor tip can in particular be designed as a purely mechanical component.
  • the sensor tip at least one
  • combustion chamber facing plug and / or cover which may be configured, for example, cylindrical.
  • a blanking plug can be provided, which can be inserted or placed in the receptacle and / or on the receptacle.
  • the plug may in particular, as well as the glow module, comprise a projection which can be inserted into an optionally annular designed receptacle.
  • the stationary element of the adapter element may be an annular part of the housing, for example a part of an inner housing which completely or partially encloses an interior space of the device and / or a sensor module of the device.
  • the movable element is generally an element to understand which a change in position relative to the stationary element, ie in terms of the housing, for example, with respect to an outer housing, perform, in particular due to a change in pressure in the combustion chamber. While the stationary designed part is thus part of the rest of the housing, the movable element may be part of a force path, via which a movement, a force or a pressure from the combustion chamber to the mechanical-electrical
  • Transducer element is transmitted.
  • the movable element in the form of the sleeve is suspended by means of a flexurally elastic web on the stationary element.
  • the flexurally elastic web is designed, for example, like a membrane.
  • the combustion chamber side recording of the movable element may be configured such that, for example, the
  • Transducer element may be arranged in particular at least one transmission element for transmitting force to the mechanical-electrical transducer element.
  • a force transmission can basically the transfer of forces, pressures,
  • the transmission element may be designed in particular rod-shaped or annular. Particularly preferred is the embodiment as a one-piece or multi-part V-cylinder, the outside of which may be cylindrical or stepped. For example, that can
  • Transmission element on the side facing away from the combustion chamber on the receptacle for example on the movable element of the receptacle, in particular the receiving ring to be supported.
  • the transmission element for example, in turn have a projection which projects into the interior side opening of the innraum disorderen recording.
  • a groove or a shoulder may be provided on which the Receiving ring and / or designed differently receiving recording can be supported.
  • the transmission element may in particular have at least one passage for performing at least one electrical supply line of the pressure transducer.
  • this may be at least one bore
  • This bore may be arranged parallel to an axis of the device, but may in principle be arranged at an angle to the axis, for example at an angle between 5 degrees and 70 degrees, in particular a Wnkel between 30 degrees and 60 degrees.
  • the supply line which, for example, centrally from the pressure transducer, for example, the Glühmodul, on the
  • Combustion chamber remote from the side thereof can be guided laterally on the preferably arranged on the axis of the device mechanical-electrical transducer element and / or on parts of the transmission element. Wrd the implementation is not required and the recording is open to the combustion chamber, so through the pressure transducer, in particular through the sensor tip (preferably the plug), the implementation of the combustion chamber
  • Passage can extend through the entire transmission element or even merely through parts thereof, for example, only by an optional compensation body of the transmission element, which will be described in more detail below.
  • the transmission element can be designed in one piece or also in several parts.
  • the transmission element comprises one or more compensation bodies for at least partial compensation of thermomechanical stresses.
  • the compensation element can be set up, for example, by a suitable choice of its length and / or its thermal expansion coefficient, so that the thermal expansions of the different transmission paths are at least largely identical, at least within typical temperature ranges to which the device can be exposed, for example within the scope of a tolerable deviation from not more than 20%, in particular not more than 10% and preferably not more than 5%. For example, you can
  • Compensation elements for a compensation of the type described above provide. For example, this can be done by suitable choice of material, for. B. by using ceramic materials with appropriate properties.
  • the housing may in particular be designed in several parts and have at least one outer housing and at least one of the outer housing at least partially enclosed inner housing.
  • the adapter element can
  • This inner housing may in particular comprise an inner housing wall, wherein the adapter element is arranged on the combustion chamber side in the inner housing wall.
  • the adapter element itself is part of the whole or in part, for example, with its part fixed to the housing
  • Interior housing wall is.
  • the inner housing wall can be closed on at least one fixation on a side facing away from the combustion chamber.
  • the mechanical-electrical transducer element can be supported on this fixation.
  • This multi-part embodiment can in particular realize the concept of the above-described multiple transmission paths. So can the actual Force path of the pressure transducer via the adapter element and optionally the transmission element to the mechanical-electrical transducer element lead.
  • a second transmission path, via which, however, preferably no or a significantly lower transmission of forces and / or linear expansion takes place, can lead via the pressure sensor and the inner housing as well as the fixation to the mechanical-electrical transducer element.
  • Compensating body can provide compensation for thermo-mechanical stresses between these transmission paths.
  • the inner housing wall may in particular have a cylindrical shape, in particular in the form of a hollow cylinder.
  • the movable element for example the receiving ring, can in particular extend from the inner housing wall into the interior of the inner housing and form the receptacle or a part of the receptacle there.
  • the receiving ring may have a T-shape, in particular in a sectional plane parallel to an axis of the device, wherein the base of the T connects the receiving ring with the inner housing wall and wherein the transverse line of the T forms the actual recording.
  • Figure 1 shows a first embodiment of a device according to the invention for detecting a combustion chamber pressure in a combustion chamber of an internal combustion engine for use in self-igniting
  • FIG. 2 shows an alternative embodiment of the device for FIG
  • the combustion chamber is denoted symbolically in FIGS. 1 and 2 by the reference numeral 1 12 and is located in FIGS. 1 and 2 on the left of the device 1 10.
  • FIG. 1 shows this
  • Embodiment of the device 1 10 for use in non-self-igniting internal combustion engines shows.
  • the device 110 essentially comprises two assemblies, namely one
  • the pressure transducer 1 16 16 includes a glow module 1 18, the pressure transducer comprises 1 16 in the embodiment for non-self-igniting internal combustion engine sensor tip 120th in the form of a plug 122.
  • the plug 122 may be designed in particular in the form of a dummy plug and / or lid.
  • the sensor unit 1 14 comprises a housing 124, which in this exemplary embodiment has an exemplary multi-part design.
  • the housing 124 accordingly includes an outer housing 126 as well as one of these
  • the inner housing 128 encloses with a substantially cylindrical in this embodiment configured
  • Inner housing wall 130 an interior 132 of the housing 124, in which a sensor module 134 with a mechanical-electrical transducer element 136, such as a piezoelectric element, is added. This is on one
  • Fixing element 140 supported on the side facing away from the combustion chamber 1 12 side of the housing 124 and is electrically contacted by sensor contacts 138, which are passed for example by the fixing element 140.
  • an adapter element 142 is arranged within the outer housing 126.
  • the adapter element 142 comprises a stationary element 144 which is arranged relative to the housing 124 and which forms part of the housing
  • Inner housing wall 130 may be, and a spaced from the stationary member 144 movable member 146. Between the stationary member 144 and the
  • the movable member 146 is a flexurally elastic web 147 is formed.
  • the stationary member 144 is annular and fixed to the inner wall of the outer housing 126 or is itself part of the outer housing 126.
  • the movable member 146 is in the form of a sleeve 148 or a ring.
  • the sleeve 148 or the ring indicates a combustion chamber side opening on a first end face and on the opposite inner side opening on a second end face.
  • the first end surface forms a combustion chamber-side support surface 152 for the pressure sensor 116 and the second end surface forms an interior-side support surface 155 for a first transmission element 156.
  • Combustion chamber open, but is closed by the pressure transducer 1 16.
  • Another embodiment is possible in principle.
  • the pressure transducer 1 16 has in the illustrated embodiment
  • a fixation of the pressure transducer 1 16 in the combustion chamber side opening take place, for example, a frictional, a positive or a cohesive fixation.
  • a combination of different fixation types is possible.
  • the flexurally elastic web 147 is preferably as a ring-shaped or
  • the closed web 147 forms a gas-tight partition between the combustion chamber 112 and the interior 132.
  • Active compound is still facing the interior 132 facing first
  • the first transmission element 156 is on its side facing the pressure transducer 1 16 side also designed with a projection 158, which another, the combustion chamber 1 12 facing the combustion chamber side
  • the first transmission element 156 can serve, for example, as compensation body for compensation of thermo-mechanical stresses.
  • the inner housing 128 is secured to the inner housing wall 130.
  • the inner housing 128 is further connected to a fixing element 140.
  • the sensor module 132 is below the inner housing 128 between the movable member 146 and the fixing member 140 under
  • Transmission element 156 and further transmission element 154 extends to the mechanical-electrical transducer element 136 of the sensor module 134.
  • a second force path extends over the pressure transducer 1 16, the fixed element 144, and the fixing element 140. To compensate for different expansions of these transmission paths, the first executed as a compensation body
  • the pressure transducer comprises 16 16 in the diesel engine variant according to Figure 1, the glow module 118. This is basically einbaukompatibel respect to the pressure transducer 1 16 and the sensor tip 120 at the
  • the glow module 118 includes the actual glow plug 162, which is enclosed on the housing side by a support tube 164 which is fixedly connected to the glow plug 162, for example non-positively, positively or materially.
  • the support tube 164 has the projection 150, which is inserted into the combustion chamber-side opening of the sleeve 148 and there with a unspecified shoulder as
  • the glow module 118 is electrically contacted by means of one or more electrical leads 166, which also as Glühstromtechnisch be designated.
  • the Glühstromtechnisch can be guided by one or more bushings 168, for example, one or more holes in the transmission element 154, for example, the compensation body 156, preferably eccentrically. This implementation can be done either axially, as shown, or obliquely.
  • the eccentric passage causes the electrical supply line 166 also eccentrically through the interior 132 and thus exits laterally adjacent to the sensor module 134.
  • the electrical supply line 166 preferably does not represent a disturbing contour next to the sensor module 134. In particular, because of this electrical supply line 166, it is not necessary to make the adjacent components smaller or to carry out any other redesign of the components accommodated in the interior 132.
  • the electrical supply line 166 may be passed through a further passage 170, again an eccentric bore, through the fixing element 140,
  • the feedthroughs 168, 170 for the electrical supply line 166 can also in the
  • Sensor unit 1 14 be present if they, as shown in Figure 2, are shown for non-self-igniting internal combustion engines such as gasoline engines.
  • the bushings 168, 170 although without function, but can be used unchanged, since they are not hindering due to the sealing of the interior 132 by the pressure transducer 1 16.
  • the sensor module 134 On the side facing away from the combustion chamber 112 of the fixing element 140 is an electrical contacting of the sensor module 134 by means of the sensor contacts 138 and optionally (in the variant of Figure 1) of the electrical supply line 166 as in known from the prior art devices for combustion chamber pressure detection. Alternatively, it is also possible to lead the electrical supply line 166 laterally out of the rear region of the support tube 164 of the glow module 118, for example shortly before the compensation body. This variant is not shown.

Abstract

L'invention concerne un dispositif pour détecter une pression dans une chambre de combustion (112) d'un moteur à combustion interne. Le dispositif comprend au moins un boîtier (124), un élément adaptateur (142) logé dans le boîtier (124) et un élément de conversion mécanico-électrique (136) disposé dans le boîtier (124), l'élément adaptateur (142) étant en liaison fonctionnelle avec un capteur de pression (116) et avec au moins un élément de transmission (156). L'élément adaptateur (142) comprend un élément fixe (144) relié au boîtier (124) et un élément mobile (146), le capteur de pression (116) entrant en prise avec l'élément mobile (146) et l'élément mobile (146) étant conçu pour transmettre au moins en partie à l'élément de conversion mécanico-électrique (136) une force exercée par la pression de la chambre de combustion sur le capteur de pression (116). L'élément mobile (146) présente un logement du côté chambre de combustion pour le capteur de pression (116) et un logement du côté intérieur pour l'élément de transmission (156). Un pont (147) élastiquement flexible réalisé en forme d'anneau est formé entre l'élément fixe (144) et l'élément mobile (146).
EP11733844.2A 2010-08-02 2011-07-18 Dispositif pour détecter une pression de chambre de combustion d'un moteur à combustion interne Withdrawn EP2601497A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010038798 DE102010038798A1 (de) 2010-08-02 2010-08-02 Vorrichtung zur Erfassung eines Brennraumdrucks
PCT/EP2011/062210 WO2012016811A1 (fr) 2010-08-02 2011-07-18 Dispositif pour détecter une pression de chambre de combustion d'un moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP2601497A1 true EP2601497A1 (fr) 2013-06-12

Family

ID=44628738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11733844.2A Withdrawn EP2601497A1 (fr) 2010-08-02 2011-07-18 Dispositif pour détecter une pression de chambre de combustion d'un moteur à combustion interne

Country Status (5)

Country Link
EP (1) EP2601497A1 (fr)
JP (1) JP2013532832A (fr)
CN (1) CN103026196A (fr)
DE (1) DE102010038798A1 (fr)
WO (1) WO2012016811A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011017647A1 (de) 2011-04-28 2012-10-31 Robert Bosch Gmbh Vorrichtung zur Erfassung eines Drucks, insbesondere eines Brennraumdrucks einer Brennkraftmaschine
DE102011017667A1 (de) 2011-04-28 2012-10-31 Robert Bosch Gmbh Vorrichtung zur Erfassung eines Drucks, insbesondere eines Brennraumdrucks einer Brennkraftmaschine
DE102012209237A1 (de) * 2012-05-31 2013-12-05 Robert Bosch Gmbh Druckmessglühkerze
DE102013215860A1 (de) * 2013-08-12 2015-02-12 Robert Bosch Gmbh Sensormodul für Druckmessglühstiftkerze
DE102014200349A1 (de) 2014-01-10 2015-07-16 Robert Bosch Gmbh Temperaturleitelement für einen Brennraumdrucksensor
CH709304A1 (de) * 2014-02-25 2015-08-28 Kistler Holding Ag Glühkerzenadapter.
DE102014222787A1 (de) 2014-11-07 2017-04-27 Robert Bosch Gmbh Vorrichtung und Verfahren zur Erfassung eines Brennraumdrucks
DE102015205671A1 (de) 2015-03-30 2016-10-06 Robert Bosch Gmbh Brennraumdruckaufnehmer, Verbrennungskraftmaschine und Verfahren zur Messung eines Brennraumdrucks in einem Brennraum einer Verbrennungskraftmaschine
DE102015224168A1 (de) * 2015-12-03 2017-06-08 Robert Bosch Gmbh Vorrichtung zum Erfassen eines Brennraumdrucks in einem Brennraum einer Brennkraftmaschine

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US20050061063A1 (en) 2003-09-19 2005-03-24 Beru Ag Pressure glow plug for a diesel engine
US20100037698A1 (en) * 2006-12-05 2010-02-18 Christoph Kern Pressure-measuring device

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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
DE10044478C2 (de) * 2000-09-08 2002-11-28 Bosch Gmbh Robert Schwingungsaufnehmer bzw. Isolierscheibe für einen Schwingungsaufnehmer
JP3942176B2 (ja) * 2003-03-17 2007-07-11 日本特殊陶業株式会社 燃焼圧検知機能付きグロープラグ及びその製造方法
JP2004278934A (ja) * 2003-03-17 2004-10-07 Ngk Spark Plug Co Ltd 燃焼圧検知機能付きグロープラグ
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
DE102005035062A1 (de) * 2005-07-27 2007-02-15 Robert Bosch Gmbh Vorrichtung zur Erfassung des Brennraumdrucks einer Brennkraftmaschine
JP2007177782A (ja) * 2005-11-30 2007-07-12 Ngk Spark Plug Co Ltd 燃焼圧力センサ付きグロープラグ
WO2009146565A1 (fr) * 2008-06-04 2009-12-10 Kistler Holding Ag Capteur de pression pour des mesures dans une chambre d’un moteur à combustion interne
DE102009026436A1 (de) 2009-05-25 2010-12-09 Robert Bosch Gmbh Vorrichtung zur Erfassung eines Brennraumdrucks einer Brennkraftmaschine

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US20050061063A1 (en) 2003-09-19 2005-03-24 Beru Ag Pressure glow plug for a diesel engine
US20100037698A1 (en) * 2006-12-05 2010-02-18 Christoph Kern Pressure-measuring device

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Title
See also references of WO2012016811A1 *

Also Published As

Publication number Publication date
DE102010038798A1 (de) 2012-02-02
WO2012016811A1 (fr) 2012-02-09
CN103026196A (zh) 2013-04-03
JP2013532832A (ja) 2013-08-19

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