EP2006534B1 - Système de préchauffage et procédé de commande de puissance d'une bougie de préchauffage - Google Patents

Système de préchauffage et procédé de commande de puissance d'une bougie de préchauffage Download PDF

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Publication number
EP2006534B1
EP2006534B1 EP08011014A EP08011014A EP2006534B1 EP 2006534 B1 EP2006534 B1 EP 2006534B1 EP 08011014 A EP08011014 A EP 08011014A EP 08011014 A EP08011014 A EP 08011014A EP 2006534 B1 EP2006534 B1 EP 2006534B1
Authority
EP
European Patent Office
Prior art keywords
glow plug
gnd
supply voltage
ground
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08011014A
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German (de)
English (en)
Other versions
EP2006534A2 (fr
EP2006534A3 (fr
Inventor
Martin Blanc
Peter Schäfer
Gerd Bräuchle
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.)
BorgWarner Ludwigsburg GmbH
Original Assignee
BorgWarner Beru Systems GmbH
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Publication date
Application filed by BorgWarner Beru Systems GmbH filed Critical BorgWarner Beru Systems GmbH
Publication of EP2006534A2 publication Critical patent/EP2006534A2/fr
Publication of EP2006534A3 publication Critical patent/EP2006534A3/fr
Application granted granted Critical
Publication of EP2006534B1 publication Critical patent/EP2006534B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • 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

Definitions

  • the invention relates to an annealing system for a diesel engine of a motor vehicle having the features specified in the preamble of claim 1 and a method for power control of a glow plug.
  • An annealing system with the features specified in the preamble of claim 1 is known from DE 197 44 924 A1 known, a method having the features of the preamble of claim 7 of the EP 1 933 025 A1 ,
  • the strength of the electrical supply voltage is subject in motor vehicles usually more or less large fluctuations.
  • a measurement of the strength of the available supply voltage is required.
  • the pulse width ie the duration of the time intervals during which the supply voltage for supplying a desired electrical power to the Consumer is created, depending on the value of the supply voltage can be selected.
  • a poor connection of a measuring or control device to a ground potential applied to the consumer can lead to a faulty value being determined during a measurement of the supply voltage, since the supply voltage in such a case is measured relative to a reference potential, that of the consumer deviates from the applied ground potential.
  • Using an incorrect supply voltage value for power control will result in too much or too little power being delivered, which can lead to damage. For example, glow plugs that overheat due to excessive power have a reduced life. Glow plugs that do not reach their specified final temperature lead to a deterioration of the ignition behavior.
  • a common cause of a poor connection of a measuring or control device to a ground potential are faulty or aged connectors that can create a significant resistance.
  • the object of the invention is therefore to show a way how the power control of glow plugs can be improved.
  • the invention enables a better power control by a more precise determination of the supply voltage.
  • this measurement takes place with respect to a reference potential, which may deviate from the ground potential applied to the consumer, for example due to bad contacts, so that the actual value of the consumption voltage applied to the consumer the determined value deviates by the difference between the reference potential and the ground potential.
  • a possible deviation of the reference potential detected by the ground potential and used for a correction of a measured value of the supply voltage is a possible deviation of the reference potential detected by the ground potential and used for a correction of a measured value of the supply voltage.
  • the value of the supply voltage of the load can be determined with greater precision, so that, for example, in a power control by pulse width modulation, the duration of supply voltage pulses applied to the consumer for introducing a desired power can be calculated on a more reliable basis.
  • the supply voltage is measured in a first step relative to a reference potential. Since the value of this reference potential for various reasons may deviate from the value of a ground potential applied to the consumer, it is checked in a further step whether the reference potential deviates from the ground potential and determines a value of a possibly existing deviation. Preferably, the value of a possible deviation of the reference potential from the ground potential is determined with a voltage divider circuit and a test voltage source.
  • a test voltage for example, the operating voltage required for electronic components can be used. Suitable voltage sources are already integrated in many electronic devices anyway, so that, for example, a voltage of 5 volts with little effort can be provided reliably and largely free of voltage fluctuations available.
  • the supply voltage between a measuring input and a ground input of a measuring device integrated in the control device is measured relative to a reference potential which is applied to the ground input of the control device.
  • the control device has a test input which is connected in operation via a first resistor to a test voltage source and via a second resistor to the potential connection of the glow plug.
  • the two resistors form a voltage divider circuit, so that it is known or easy to determine which potential difference should be present under ideal conditions between the potential of the test input and the potential of the ground input, ie if the reference potential is identical to the ground potential. Is from the controller if the expected value is not measured, a possible deviation is based on a difference between the reference potential and the ground potential. A possibly determined deviation can therefore be used for a correction of the measured value of the supply voltage.
  • An essential component of an inventive glow system is the control device described above, which can be readily used for power control of other consumers as glow plugs.
  • FIG. 1 schematically illustrated glow system comprises a plurality of glow plugs, which in FIG. 1 are shown as resistors RG1 and RG2. Of course, more glow plugs can be added to the annealing system as needed.
  • Each of the glow plugs RG1, RG2 has a potential connection, which can be applied to a supply voltage U1 via a supply line G1 or G2.
  • a switch S1 is arranged, so that the energization of the glow plugs RG1, RG2 for power control by pulse width modulation can be interrupted as needed.
  • the switch S1 preferably a power transistor, is actuated by a control unit 1 for power control.
  • the control unit 1 comprises a microprocessor with an analog-to-digital converter.
  • the power control is performed by the control unit 1 by a pulse width modulation method in which the switch S1 for generating the pulse widths is opened or closed for suitable time intervals for feeding a desired electric power into the glow plug RG1.
  • the duration of the pulse widths are set by the control unit 1 for feeding the desired electric power depending on the magnitude of the supply voltage U1.
  • the supply voltage U1 for example, about 11 volts is provided by the electrical system of the motor vehicle.
  • the control device 1 has a measuring input ADC1 of its integrated analog-to-digital converter.
  • the fair entrance ADC1 is in accordance with FIG. 1 as well as the potential connection of the glow plugs RG1, RG2 the supply voltage U1 supplied.
  • the supply voltage U1 is measured by the control device 1 relative to a reference potential GND ', which is applied to a ground input ADC2 of the control device 1.
  • the reference potential GND ' can deviate from the ground potential GND which is applied to the ground terminal of the glow plugs RG1, RG2, for example because of bad contacts, which can be based on defective connectors, which are common for connection of electronic components in the automotive industry.
  • the resistor R3 is located, which is based on a poor connection of the ground input ADC2 of the control device 1 to the ground potential GND.
  • the disturbance resistor R3 causes the reference potential GND 'to deviate from the ground potential GND and consequently the voltage value determined by the control device 1 for the supply voltage U1 deviates from the voltage drop across the glow plug RG1, RG2.
  • the control device 1 has a test input ADC3, which is connected via a first fixed resistor R1 to a test voltage source which supplies the constant test voltage U2.
  • the test input ADC3 is further connected via a second fixed resistor R2 to the potential terminal of the glow plug RG1, RG2.
  • the fixed resistor R2 is connected in parallel with a respective glow plug RG1, RG2.
  • the supply voltage U1 is disconnected from the potential terminal of the glow plug RG1, RG2.
  • the switch S1 is opened by the control device 1.
  • the defined resistors R1 and R2 form a voltage divider circuit, so that at the test input ADC3 a voltage U3 is applied, the value of which is very accurately known with respect to the ground potential GND, since in the first approximation only the value of the test voltage U2, and the fixed resistors R1 and R2 depends.
  • the exact value of the voltage U3 is naturally also influenced by other factors, for example the electrical resistance of the glow plugs RG1, RG2. Since the electrical resistance of a glow plug including feed lines at room temperature is typically only about 0.5 ohms, these influences are usually negligible and can be taken into account, if necessary, by a more accurate calculation.
  • the fixed resistors R1 and R2 typically have a value of a few hundred ohms, the test voltage U2 preferably has a value of 5 volts.
  • the test voltage source preferably also supplies the operating voltage required by the control device. Therefore, the voltage supply required for the microprocessor of the control device 1 can be used as the test voltage source.
  • the first resistor R1 and the second resistor R2 are each at least 50 times, preferably at least 200 times, in particular at least 1000 times, as large as the resistance of the glow plug RG1, RG2.
  • This measure has the advantage that the electrical resistance of the glow plug RG1, RG2 has no influence on the potential U3 applied to the test input ADC3 in good nutrition.
  • control device 1 determines that the value of the potential U3 present at the test input ADC3 deviates relative to the reference potential GND 'from a desired value which, as explained above, depends in first approximation only on the fixed resistors R1, R2 and the value of the test voltage U2 , this means that also the reference potential GND 'deviates from the ground potential GND.
  • a possibly determined deviation is used by the control device 1 for a correction of the measured value of the supply voltage U1, which was measured relative to the reference potential GND 'present at the ground input. In this way For example, the desired electrical power can be fed into the glow plug RG1, RG2 for the power control with greater precision.
  • the test voltage U2 is preferably smaller than the supply voltage U1, which is for example 11 volts.
  • a diode D1 or D2 is arranged in the illustrated embodiment.
  • the diode D1, D2 prevents the supply voltage U1 from influencing the value of the potential U3 applied to the test input ADC3 of the control device 1.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Resistance Heating (AREA)

Claims (9)

  1. Système à incandescence pour un moteur diesel d'un véhicule automobile, avec :
    - une bougie de préchauffage (RG1, RG2), comportant une borne de potentiel pour l'application d'une tension d'alimentation (U1), et une borne de masse pour le raccordement à un potentiel de masse (GND),
    - un dispositif de commande (1) pour commander la puissance électrique alimentée vers la bougie de préchauffage (RG1, RG2) pendant le fonctionnement, dans lequel le dispositif de commande (1) comporte une entrée de masse (ADC1) et une entrée de masse (ADC2), afin de déterminer, pendant le fonctionnement, une valeur de mesure de la tension d'alimentation U1 par rapport à un potentiel de référence (GND') appliqué à l'entrée de masse (ADC2), dans lequel le dispositif de commande (1) possède une entrée de contrôle (ADC3) raccordée, pendant le fonctionnement, à une source de tension de contrôle par une première résistance (R1) et à la borne de potentiel de la bougie de préchauffage (RG1, RG2) par une deuxième résistance (R2),
    dans lequel, pendant le fonctionnement, le dispositif de commande (1) détermine une différence de potentiel entre le potentiel de l'entrée de contrôle (ADC3) et le potentiel (GND') de l'entrée de masse (ADC2), et détermine un écart entre la différence de potentiel et
    une valeur théorique, et si cet écart est différent de zéro, utilise l'écart pour une correction de la valeur de mesure de la tension d'alimentation (U1), mesurée par rapport au potentiel de référence (GND') appliqué à l'entrée de masse (ADC2), tout en se basant sur la valeur corrigée de la tension d'alimentation (U1) pour commander la puissance, caractérisé en ce qu'une diode est agencée entre la deuxième résistance (R2) et la borne de potentiel de la bougie de préchauffage (RG1, RG2).
  2. Système à incandescence selon la revendication 1, caractérisé en ce que la commande de la puissance est effectuée par une modulation de la largeur d'impulsion.
  3. Système à incandescence selon l'une des revendications précédentes, caractérisé par une ligne d'alimentation (G1) raccordée à la borne de potentiel de la bougie de préchauffage (RG1, RG2), pour le raccordement à une source de tension d'alimentation, dans lequel un interrupteur (S1) actionné par le dispositif de commande (1) pour la commande de puissance est agencé dans la ligne d'alimentation (G1).
  4. Système à incandescence selon l'une des revendications précédentes, caractérisé par plusieurs bougies de préchauffage (RG1, RG2).
  5. Système à incandescence selon l'une des revendications précédentes, caractérisé en ce que la source de tension de contrôle fournit une tension de service nécessaire au dispositif de commande (1), de préférence de 5V.
  6. Système à incandescence selon l'une des revendications précédentes, caractérisé en ce que la première résistance (R1) et la deuxième résistance (R2) sont respectivement au moins 50 fois supérieures à la résistance de la bougie de préchauffage (RG1, RG2), de préférence au moins 200 fois, en particulier au moins 1000 fois.
  7. Procédé pour la commande de la puissance d'une bougie de préchauffage (RG1, RG2), par une modulation de la largeur d'impulsion d'une tension d'alimentation (U1), dans lequel la tension d'alimentation (U1) est mesurée par rapport à un potentiel de référence (GND') appliqué à l'entrée de masse (ADC2) d'un appareil de mesure de tension,
    - tout en contrôlant si le potentiel de référence (GND') s'écarte d'un potentiel de masse (GND) appliqué à la bougie de préchauffage (RG1, RG2), et en déterminant une valeur d'un éventuel écart,
    - la durée temporelle d'impulsions de tension d'alimentation, appliquées à la bougie de préchauffage (RG1, RG2) pour obtenir une puissance souhaitée, est calculée à partir d'une valeur de la tension d'alimentation (U1) mesurée par rapport au potentiel de référence (GND'), et de la valeur d'un écart éventuel entre le potentiel de référence (GND') et le potentiel de masse (GND), caractérisé en ce que la tension d'alimentation (U1) est mesurée au moyen d'une source de tension de contrôle raccordée à une borne de potentiel de la bougie de préchauffage (RG1, RG2), par une première résistance (R1), une deuxième résistance (R2) et une diode (D1, D2).
  8. Procédé selon la revendication 7, caractérisé en ce qu'un écart du potentiel de référence (GND') par rapport au potentiel de masse (GND) est déterminé avec un circuit diviseur de tension (R1, R2) et une source de tension de contrôle.
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que pour vérifier si le potentiel de référence (GND') s'écarte du potentiel de masse (GND) appliqué à la bougie de préchauffage (RG1, RG2), la tension d'alimentation (U1) est découplée de la bougie de préchauffage (RG1, RG2).
EP08011014A 2007-06-23 2008-06-18 Système de préchauffage et procédé de commande de puissance d'une bougie de préchauffage Not-in-force EP2006534B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007029022A DE102007029022B4 (de) 2007-06-23 2007-06-23 Glühsystem, Steuereinrichtung und Verfahren zur Leistungssteuerung einer Glühkerze

Publications (3)

Publication Number Publication Date
EP2006534A2 EP2006534A2 (fr) 2008-12-24
EP2006534A3 EP2006534A3 (fr) 2010-03-24
EP2006534B1 true EP2006534B1 (fr) 2013-01-02

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EP08011014A Not-in-force EP2006534B1 (fr) 2007-06-23 2008-06-18 Système de préchauffage et procédé de commande de puissance d'une bougie de préchauffage

Country Status (5)

Country Link
US (1) US8017888B2 (fr)
EP (1) EP2006534B1 (fr)
JP (1) JP5153473B2 (fr)
KR (1) KR101501044B1 (fr)
DE (1) DE102007029022B4 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007029022B4 (de) * 2007-06-23 2009-05-14 Beru Ag Glühsystem, Steuereinrichtung und Verfahren zur Leistungssteuerung einer Glühkerze
DE102008054510A1 (de) * 2008-12-11 2010-06-17 Robert Bosch Gmbh Steuereinheit für eine Mehrzahl von Glühstiftkerzen und Verfahren hierzu
JP2014025447A (ja) * 2012-07-30 2014-02-06 Ngk Spark Plug Co Ltd グロープラグの通電制御装置及びグロープラグの通電制御方法
DE102015222722A1 (de) * 2015-11-18 2017-05-18 Robert Bosch Gmbh Verfahren zum Betreiben und Vorrichtung zum Betreiben einer Anzahl von n Glühkerzen

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1132661A (fr) * 1979-02-14 1982-09-28 Rodney Hayden Senseur resistif
EP0315934B1 (fr) * 1987-11-09 1994-01-19 Siemens Aktiengesellschaft Méthode pour le réglage de la température des bougies dans un moteur diesel et circuit pour la réalisation de la méthode
US4939347A (en) * 1987-12-17 1990-07-03 Jidosha Kiki Co., Ltd. Energization control apparatus for glow plug
JP2794295B2 (ja) * 1988-07-11 1998-09-03 ヤマハ発動機株式会社 ガスエンジン発電装置
DE4328719A1 (de) * 1993-08-26 1995-03-02 Bosch Gmbh Robert Verfahren zur Überwachung wenigstens eines elektrischen Verbrauchers
DE19708430A1 (de) * 1996-05-21 1997-11-27 Stribel Gmbh Verfahren und Vorrichtung zur Steuerung des Glühvorgangs einer Glühkerze eines Dieselmotors
EP0809021B1 (fr) * 1996-05-21 2005-01-19 Alcoa Fujikura Gesellschaft mit beschränkter Haftung Méthode et dispositif de commande de préchauffage des bougies de réchauffage d'un moteur diesel
DE29620634U1 (de) * 1996-11-27 1997-02-06 Hella Kg Hueck & Co Steuergerät in einem Kraftfahrzeug
JP4256517B2 (ja) * 1999-02-25 2009-04-22 日本特殊陶業株式会社 グロープラグ制御装置及びグロープラグの制御方法
JP3616320B2 (ja) * 2000-09-21 2005-02-02 本田技研工業株式会社 内燃機関の点火時期制御装置
JP3810744B2 (ja) * 2003-01-29 2006-08-16 日本特殊陶業株式会社 グロープラグ通電制御装置及びグロープラグ通電制御方法
JP4391774B2 (ja) * 2003-07-17 2009-12-24 トヨタ自動車株式会社 内燃機関の制御装置および内燃機関の制御方法
JP4422693B2 (ja) * 2006-03-20 2010-02-24 トヨタ自動車株式会社 内燃機関の点火時期制御装置
EP1933025A1 (fr) * 2006-12-16 2008-06-18 GM Global Technology Operations, Inc. Système et méthode pour contrôler des charges résistives avec masse connectée à la masse du moteur
DE102007029022B4 (de) * 2007-06-23 2009-05-14 Beru Ag Glühsystem, Steuereinrichtung und Verfahren zur Leistungssteuerung einer Glühkerze

Also Published As

Publication number Publication date
KR20080113161A (ko) 2008-12-29
EP2006534A2 (fr) 2008-12-24
US20080314889A1 (en) 2008-12-25
JP5153473B2 (ja) 2013-02-27
EP2006534A3 (fr) 2010-03-24
JP2009002347A (ja) 2009-01-08
DE102007029022B4 (de) 2009-05-14
KR101501044B1 (ko) 2015-03-10
US8017888B2 (en) 2011-09-13
DE102007029022A1 (de) 2008-12-24

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