EP1725849A1 - Dispositif pour detecter la pression dans la chambre de combustion d'un moteur a combustion interne - Google Patents

Dispositif pour detecter la pression dans la chambre de combustion d'un moteur a combustion interne

Info

Publication number
EP1725849A1
EP1725849A1 EP05707764A EP05707764A EP1725849A1 EP 1725849 A1 EP1725849 A1 EP 1725849A1 EP 05707764 A EP05707764 A EP 05707764A EP 05707764 A EP05707764 A EP 05707764A EP 1725849 A1 EP1725849 A1 EP 1725849A1
Authority
EP
European Patent Office
Prior art keywords
sensor
glow plug
combustion chamber
housing
fixing member
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Withdrawn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
EP05707764A
Other languages
German (de)
English (en)
Inventor
Thomas Ludwig
Christoph Kern
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 EP1725849A1 publication Critical patent/EP1725849A1/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Withdrawn legal-status Critical Current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
    • G01L23/22—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
    • 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
    • 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 is based on a device for detecting the combustion chamber pressure in an internal combustion engine.
  • a device for detecting a combustion chamber pressure in a diesel engine is already known from DE 196 80 912 C2, with a pressure sensor and a heating section of a glow plug. This heating section faces an interior of a cylinder of the diesel engine and can be acted upon by the combustion chamber pressure.
  • the heating section is fixed within a housing of the glow plug by a fixing member.
  • the pressure sensor is arranged between this fixing member and the heating section.
  • the heating section designed as a glow plug and the pressure sensor are supported by the same fixing member with respect to the housing of the glow plug, so that the pressure sensor is acted on at least approximately by the entire force acting on the glow plug.
  • the arrangement of the pressure sensor described above with its spatial proximity to the interior of the cylinder and with its direct coupling to the Glow plug in operation of the diesel engine disadvantageously connected to a significant thermal load on the pressure sensor, so that its operational safety is at risk.
  • This can lead, particularly if the signal output of the pressure sensor is discontinuous due to fluctuations between high and low operating temperatures, to malfunctions of the device for detecting the combustion chamber pressure in the internal combustion engine and thus also to an uncertain measurement of the combustion chamber pressure in the internal combustion engine.
  • the device according to the invention with the characterizing features of the main claim has the advantage that the aforementioned shortcomings are avoided to a satisfactory extent.
  • the senor is arranged between the fixing element of the glow plug of the glow plug and a second end of the glow plug. This offers the possibility to decouple the sensor from the full force acting on the glow plug and to operate it in its linear and low-hysteresis range.
  • the load range of the sensor can be deliberately limited so that the signal-optimal range of the sensor can be used with regard to a safe and reproducible detection of the combustion chamber pressure in the internal combustion engine.
  • the sensor is thermally relieved, so that the sensor is relieved with regard to its
  • the at least indirect non-positive connection of the sensor with the fixing member takes place with pretension. This counteracts a hysteresis effect during the acquisition of measured values.
  • the senor is separated from the fixing member or the fixing element by at least one spacer.
  • the maximum force acting on the sensor can be set.
  • the at least one spacer body is designed as an intermediate sleeve, the sensor as a piezo ring and the fixing element as a sleeve.
  • glow and signal lines for the glow plug or the sensor can be passed through in a simplified manner.
  • a device for detecting the combustion chamber pressure in an internal combustion engine contains a glow plug 11 which is mounted by means of an external thread 12 of a tubular housing 13 made of metal in a cylinder head 14 of the internal combustion engine, only a part of which is shown, in particular a diesel engine.
  • the glow plug 11 has a glow plug 17 which partially protrudes from the housing 13 and projects with a free end 18 into an interior 19 of the internal combustion engine which forms a combustion chamber.
  • the glow plug 17 is fastened in the glow plug 11 by a fixing member 22.
  • This fixing member 22 is designed as a support tube which, in one end region 23 of the other end of the glow plug 17, surrounds it fixedly on the circumference, the fixing member 22 projecting slightly beyond the other end of the glow plug 17.
  • the fixing member 22 is in turn pressed into the housing 13.
  • the fixing member 22 could also be realized by a graphite sleeve or in the form of a material connection, for example as a welded connection.
  • a sensor 26 is arranged between the fixing member 22 and the second end 24 of the glow plug 11.
  • the sensor 26 is spaced from the facing end of the fixing member 22 in the exemplary embodiment by a spacer 27.
  • the sensor 26 could also bear directly against the facing end of the fixing member 22.
  • the sensor 26 is supported by a fixing element 29 for the sensor 24, with a spacer 28 being interposed, which is fixed in the housing 13 and thus fixes the position of the sensor 24 in the housing 13.
  • the fixing element 29 is designed, for example, as a sleeve caulked in the housing 13 and, alternatively, could also be in direct contact with the sensor 26.
  • the spacer 27 and the spacer 28 are each in the form of an intermediate sleeve 31, which is preferably made of ceramic or steel.
  • contacting elements which are not detailed, emerge in the form of electrical lines, which serve, for example, on the one hand to supply power to the glow plug 17 and on the other hand to forward the signals emitted by the sensor 26.
  • part of the compressive force on the glow plug 17 leads to an elastic longitudinal deformation of the housing 13 between the end of the fixing member 22 which faces the sensor 26 and the fixing point of the fixing element 29 on the housing 13 on this force transmission path.
  • This deformation is caused by the Sensor 26, which is implemented, for example, in the exemplary embodiment by a force or displacement sensor designed as a piezo ring.
  • the signal emitted by the sensor 26 can be correlated with the pressure in the combustion chamber 19 via characteristic curves. In the ideal case, the signal emitted by the sensor 26 is a variable that is proportional to the pressure in the combustion chamber 19.
  • the sensor 26 can also be operated in a preloaded manner in order to detect the pressure in the combustion chamber 19, for example in order to reduce hysteresis effects.
  • the sensor 26 after the glow plug 17 has been fixed by the fixing member 22 on the housing 13, is subjected to a predetermined force which, even when the internal combustion engine is not in operation, alternatively also only presses it indirectly against the fixing member 22 via the intermediate spacer 27.
  • This preload is maintained by the fixing element 29, which is fixedly mounted in the housing 13, or a spacer element 28 fixed to the housing 13.
  • the maximum force on the sensor 26 can be determined by the
  • Stiffness of the housing 13, the fixing member 22 or the fixing element 29 can be set.
  • the area of the sensor 26 that is optimal in terms of signal technology can be used are, so that a safe and reproducible detection of the combustion chamber pressure is possible in the internal combustion engine.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

La présente invention concerne un dispositif conçu pour détecter la pression dans la chambre de combustion d'un moteur à combustion interne de manière sûre et reproductible. A cette fin, dans une bougie de préchauffage (11), un crayon de préchauffage (17) exposé à la pression de la chambre de combustion est fixé dans un boîtier (13) de la bougie de préchauffage (11) au moyen d'un organe de fixation (22). Un capteur (26) est fixé dans le boîtier (13) de la bougie de préchauffage (11) au moyen d'un élément de fixation (29) éloigné dudit organe de fixation (22). Ledit capteur (26) détecte la dilatation longitudinale élastique du boîtier (13), induite par la pression dans la chambre de combustion, entre l'extrémité de l'organe de fixation (22) qui fait face au capteur (26) et le point de fixation de l'élément de fixation (29) sur le boîtier (13). Le dispositif selon cette invention est de préférence utilisé dans le domaine de la construction automobile.
EP05707764A 2004-03-06 2005-01-13 Dispositif pour detecter la pression dans la chambre de combustion d'un moteur a combustion interne Withdrawn EP1725849A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004011098A DE102004011098A1 (de) 2004-03-06 2004-03-06 Vorrichtung zur Erfassung des Brennraumdrucks bei einer Brennkraftmaschine
PCT/EP2005/050123 WO2005085787A1 (fr) 2004-03-06 2005-01-13 Dispositif pour detecter la pression dans la chambre de combustion d'un moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP1725849A1 true EP1725849A1 (fr) 2006-11-29

Family

ID=34877508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707764A Withdrawn EP1725849A1 (fr) 2004-03-06 2005-01-13 Dispositif pour detecter la pression dans la chambre de combustion d'un moteur a combustion interne

Country Status (5)

Country Link
US (1) US7730771B2 (fr)
EP (1) EP1725849A1 (fr)
JP (1) JP2007527541A (fr)
DE (1) DE102004011098A1 (fr)
WO (1) WO2005085787A1 (fr)

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FR2869394B1 (fr) * 2004-04-27 2006-07-14 Siemens Vdo Automotive Sas Tete de bougie de prechauffage et capteur de pression piezo-electrique correspondant
DE102004063750A1 (de) * 2004-12-29 2006-07-13 Robert Bosch Gmbh Glühstiftkerze mit integriertem Brennraumdrucksensor
DE102005021229A1 (de) * 2005-05-09 2006-11-16 Robert Bosch Gmbh Glühstiftkerze mit Brennraumdrucksensor
DE102005051817B4 (de) * 2005-10-28 2008-06-05 Beru Ag Druckmessglüheinrichtung, insbesondere Druckmessglühkerze
DE102006008639A1 (de) * 2005-12-23 2007-06-28 Robert Bosch Gmbh Glühstiftkerze
DE102006049079A1 (de) * 2006-10-13 2008-04-17 Robert Bosch Gmbh Druckmesseinrichtung
DE102007044967A1 (de) * 2007-09-19 2009-04-02 Beru Ag Glühkerze mit verkokungsoptimiertem Design, spezielle Ringspaltausbildung
DE102008017110B3 (de) * 2008-04-02 2009-09-10 Beru Ag Druckmessglühkerze
DE102008020509B4 (de) * 2008-04-23 2010-02-25 Beru Ag Verfahren zur Herstellung einer Vorrichtung zur Ermittlung des Brennraumdrucks und eine solche Vorrichtung
US9581058B2 (en) 2010-08-13 2017-02-28 Eaton Corporation Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US9228454B2 (en) 2010-03-19 2016-01-05 Eaton Coporation Systems, methods and devices for rocker arm position sensing
US9708942B2 (en) 2010-03-19 2017-07-18 Eaton Corporation Rocker arm assembly and components therefor
US9938865B2 (en) 2008-07-22 2018-04-10 Eaton Corporation Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US8985074B2 (en) 2010-03-19 2015-03-24 Eaton Corporation Sensing and control of a variable valve actuation system
US9284859B2 (en) 2010-03-19 2016-03-15 Eaton Corporation Systems, methods, and devices for valve stem position sensing
US10415439B2 (en) 2008-07-22 2019-09-17 Eaton Intelligent Power Limited Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US20190309663A9 (en) 2008-07-22 2019-10-10 Eaton Corporation Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
US9016252B2 (en) 2008-07-22 2015-04-28 Eaton Corporation System to diagnose variable valve actuation malfunctions by monitoring fluid pressure in a hydraulic lash adjuster gallery
US9291075B2 (en) 2008-07-22 2016-03-22 Eaton Corporation System to diagnose variable valve actuation malfunctions by monitoring fluid pressure in a control gallery
US9038586B2 (en) 2010-03-19 2015-05-26 Eaton Corporation Rocker assembly having improved durability
US11181013B2 (en) 2009-07-22 2021-11-23 Eaton Intelligent Power Limited Cylinder head arrangement for variable valve actuation rocker arm assemblies
US9194261B2 (en) 2011-03-18 2015-11-24 Eaton Corporation Custom VVA rocker arms for left hand and right hand orientations
US10087790B2 (en) 2009-07-22 2018-10-02 Eaton Corporation Cylinder head arrangement for variable valve actuation rocker arm assemblies
US8505365B2 (en) * 2010-03-16 2013-08-13 Eaton Corporation Magnetically coded pressure detection apparatus
US8863569B2 (en) 2010-03-16 2014-10-21 Eaton Corporation Magnetically coded temperature and pressure detection apparatus
US9885258B2 (en) 2010-03-19 2018-02-06 Eaton Corporation Latch interface for a valve actuating device
US9874122B2 (en) 2010-03-19 2018-01-23 Eaton Corporation Rocker assembly having improved durability
EP2444786B1 (fr) * 2010-10-20 2013-07-17 Sensata Technologies, Inc. BOUGIE DE PRÉCHAUFFAGE MUNIE de mesure de la pression pour un moteur à combustion
EP2679972B1 (fr) * 2011-02-25 2017-07-26 Honda Motor Co., Ltd. Dispositif de détection de la pression intérieure d'un cylindre d'un moteur à combustion interne du type à injection directe
USD750670S1 (en) 2013-02-22 2016-03-01 Eaton Corporation Rocker arm
CN105121090A (zh) 2014-03-03 2015-12-02 伊顿公司 气门致动装置及其制造方法
US20160232438A1 (en) 2015-02-06 2016-08-11 American Express Travel Related Services Company, Inc. Ceramic-containing transaction cards
DE102016114929B4 (de) * 2016-08-11 2018-05-09 Borgwarner Ludwigsburg Gmbh Druckmessglühkerze

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DE10218544A1 (de) * 2001-04-26 2002-11-28 Denso Corp Glühkerze mit eingebautem Verbrennungsdrucksensor
WO2005040681A1 (fr) * 2003-10-29 2005-05-06 Siemens Vdo Automotive Bougie de prechauffage comprenant un capteur de pression et moteur ainsi equipe

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Also Published As

Publication number Publication date
US20080028841A1 (en) 2008-02-07
JP2007527541A (ja) 2007-09-27
DE102004011098A1 (de) 2005-09-22
WO2005085787A1 (fr) 2005-09-15
US7730771B2 (en) 2010-06-08

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