EP0809021B1 - Méthode et dispositif de commande de préchauffage des bougies de réchauffage d'un moteur diesel - Google Patents

Méthode et dispositif de commande de préchauffage des bougies de réchauffage d'un moteur diesel Download PDF

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Publication number
EP0809021B1
EP0809021B1 EP97108081A EP97108081A EP0809021B1 EP 0809021 B1 EP0809021 B1 EP 0809021B1 EP 97108081 A EP97108081 A EP 97108081A EP 97108081 A EP97108081 A EP 97108081A EP 0809021 B1 EP0809021 B1 EP 0809021B1
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EP
European Patent Office
Prior art keywords
glow plug
temperature
glow
heating
power
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.)
Expired - Lifetime
Application number
EP97108081A
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German (de)
English (en)
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EP0809021A2 (fr
EP0809021A3 (fr
Inventor
Martin Schütz
Bruno Lindl
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
AFL Europe GmbH
Original Assignee
Beru AG
Alcoa Fujikura 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
Priority claimed from DE19708430A external-priority patent/DE19708430A1/de
Application filed by Beru AG, Alcoa Fujikura GmbH filed Critical Beru AG
Publication of EP0809021A2 publication Critical patent/EP0809021A2/fr
Publication of EP0809021A3 publication Critical patent/EP0809021A3/fr
Application granted granted Critical
Publication of EP0809021B1 publication Critical patent/EP0809021B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/025—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs with means for determining glow plug temperature or glow plug resistance

Definitions

  • the present invention relates to a method for operating a Diesel engine by controlling a glow operation of a glow plug, at which of the glow plug initially during the heating phase until reaching a target temperature, an electric heating power is fed, whose Amount is higher than the continuous power of the glow plug in continuous operation without Damage can be supplied, the duration of the heating phase so is dimensioned that no damage to the glow plug takes place, and in which after the heating phase, the heating power of the glow plug maximum of Continuous power corresponds and is regulated by the fact that the temperature of Incandescent filament of the glow plug measured and compared with a setpoint temperature and the heating power is regulated.
  • EP 0 315 934 A1 discloses a method for controlling glow plugs Diesel engines, in which the flow of current to the glow plug through Pulse width modulation periodically off and on.
  • DE 693 04 586 discloses a method for operating a diesel engine, in which in a so-called preheating the filaments of the Glow plugs of all cylinders are supplied. Further, if necessary the start of the engine still provided a reheating by means of the candles.
  • US 4,444,160 also discloses a control for glow plugs of a Diesel engine, whereby the control also provides that before starting of the engine during a first heating period the glow plugs higher current is supplied, until a desired temperature is reached and then the heating power is reduced to the desired Keep temperature until the engine is safely started.
  • US 4,137,885 discloses a circuit for driving glow plugs, where two input variables generate a control time for the glow plugs will not damage the candles and too long a pre-heat time avoid.
  • US 5,144,922 discloses a circuit for driving glow plugs in Heating intervals, wherein between the heating intervals with a measuring current the Glow plug temperature is determined.
  • Object of the present invention is to provide a generic method create, with which diesel engines can be operated optimally.
  • the Glow plug is designed as a fast-heating rod glow plug, which of an electrical control unit can be heated up quickly such that at a given on-board voltage, they supply a certain current for a measured current Can absorb time so that they do not get a candle in no time can absorb harmful heating energy, where it is for applying the large current is advantageous, the rated voltage, i.
  • the for the Continuous operation of the candle suitable voltage to which these are connected can be, without causing damage to the glow plug, smaller than to choose the rated voltage of the ship, and that after reaching the limit for the Ignition necessary candle temperature the energy input advantageously by a clocked power supply up to her Rated continuous power is throttled until the engine is started or the Annealing process is interrupted.
  • the Glow plug control comprises a control unit, the heating power of Supply unit as a function of the temperature difference between the actually prevailing temperature of the filament and a predetermined set temperature controls.
  • an interrupter unit comprises for determining the temperature of the filament, the one of a Supply unit of the filament supplied heating power interrupts.
  • the temperature of the filament can in the inventive method be determined by the fact that the glow plug control an electrical Resistance of the filament determining and from the resistance value the Temperature of the filament calculating measuring unit comprises.
  • the Glow plug is first operated with a power that keeps it in continuous operation can not withstand, but with whom they would blow. This high However, heating power is supplied to her only over a period of time, the like It is estimated that there is no damage to the gradually warming Glow plug enters.
  • the glow plug is only so long with the high Heating power operated until it has reached its target temperature. The duration the heating phase is thus determined by the amount of heating power and can be fixed for each type of glow plug used be specified.
  • one regulates the heating power of the glow plug by repeating the Temperature of a filament of the glow plug determined with a Setpoint temperature compares, and the heating power to reach a Set temperature corresponding to one of the determined temperature difference Value sets.
  • the throttling of the heating power can be done in such a way that you can Amount of practically continuously supplied heating power reduced, or but by supplying the heating power of the glow plug clocked, i. in interrupts certain time intervals, the length of the interrupting Time intervals depending on the actual temperature of the Filament is adjusted.
  • the glow plug in the heating phase with a very high performance operates, so that the glow plug is heated very quickly and that one to another determines the temperature of the filament of the glow plug and so on can determine when the setpoint temperature has been reached. As soon as that happens is throttled, the power supplied to the glow plug and the glow plug is operated at the maximum with the performance of the glow plug in continuous operation can be supplied without damage.
  • All embodiments allow short energy provision times for Ignition of the fuel when starting diesel engines with glow plugs.
  • the Exhaust emissions and engine wear are reduced during cold start occurs an increase in comfort by shortening the preheating time.
  • the candle temperature stabilized by the process is by polling the temperature at the glow plug tip, so that at sinking temperature (low load operation of the engine) by supplying a calculated amount of electrical energy (intermediate annealing) the optimal Candle temperature is reached again, and this scheme during the total working time of the engine.
  • the device according to the invention additionally comprises an arithmetic unit which in Dependence on the temperature difference between the actual value and the Desired value of the temperature of the filament to reach the Target temperature required amount of energy calculated.
  • the glow plug is electrically connected to a Supply unit for providing an electric heating power for the Glow plug connected, wherein the heating power of the supply unit means the glow plug control is controllable.
  • the glow plug with electrical energy supplied wherein the glow plug can be configured in such an advantageous manner can be that the value of the electrical voltage with which they are in continuous operation can be operated without damage, the so-called rated voltage, is lower than the on-board voltage, which is present for example in the vehicle.
  • the nominal voltage of the candles a smaller Voltage is selected as the rated on-board voltage, preferably one Voltage equivalent to about half of the on-board voltage.
  • the computing unit of Glow plug control device is designed such that at start interruption and restart after a short time Time by checking the candle temperature for the first quick start heat pulse the amount of energy or the exposure time is recalculated and regulated
  • each annealing process in Operation of the engine is characterized in that in each case the current Temperature of the glow plug tip measured and for the achievement of the Set temperature necessary electrical energy with the help of the arithmetic unit is determined.
  • one in continuous operation of the glow plug thereby regulates the heating power of the glow plug, by repeatedly determining the temperature of the filament of the glow plug, compared with the set temperature and the heating power to reach the Set temperature corresponding to one of the determined temperature difference Value sets.
  • the adjustment of the heating power for Reaching the setpoint temperature take place in that the value of the heating power is reduced in continuous operation or that the heat output clocked is supplied and the length of the clock intervals of the temperature difference between the actual temperature, i. the actual temperature of the Filament, and the setpoint temperature corresponds.
  • the heating power of the glow plug is also regulated in continuous operation, that is it thereby possible, even during any operating conditions of the engine additionally to perform annealing operations. It is advantageous if you the amounts of energy reaching a given actual temperature the setpoint temperature of the glow plug must be supplied, calculated and then the heating power as long as the glow plug feeds until the Glow plug has received the predetermined amount of energy. Thereby Driving characteristics and exhaust emissions are improved and there is a Reduction of fuel consumption and a reduction in wear of the Motors due to the optimization of combustion.
  • the Heating power supply of the glow plug briefly interrupts.
  • the time until, after an interruption of the heating power supply Temperature equilibrium within the glow plug is dependent on each type of glow plug used.
  • the heating power supply for determining the temperature of Incandescent filament for about 50 to 60 msec interrupts. It turned out that in many cases within such a period of time Temperature equilibrium is achieved within the filament, so that one advantageously at the end of this period, the temperature of the filament determined and used to control the heating power.
  • FIG. 1 is a functional diagram in a schematic manner a plant for controlling the annealing process in particular at Quick start of diesel engines (diesel) with adjustable Glow plugs for preheating during startup shown.
  • the control unit 32 comprises a central control unit in the form of a Micro-controller control and power monitoring with Power output stages, to the terminals G1, G2, G3, G4, G5 and G6 are connected. Both the micro-controller control as well as the current monitoring are to the power supply the connection 29 connected.
  • the micro-controller control is also via a line 12 with the current monitoring and via a line 14 directly to the power output stages connected.
  • the micro-controller control connected via a line 16 to a terminal 31, to the the common ground (GND) is connected.
  • the micro-controller control to a not shown in the drawing Engine control or to an engine management is connectable.
  • To terminals G1 to G6 of the controller 32 glow plugs 20, 22, 24, 26, 28 and 30 are connected, which in addition with the common ground GND in Connection stand.
  • the structure of the micro-controller control results from the Block diagram of the controller 32 in Figure 2.
  • the micro-controller control comprises a power supply unit, a microprocessor and a driver and protection circuit.
  • the microprocessor and the driver and protection circuit are connected by the connected to the terminal 29 of the controller 32 Power unit with electrical energy provided.
  • the illustrated schematically in Figure 1 as a terminal DL Connection between micro-controller control and Motor control or engine management takes place via a data interface.
  • a data interface for example, a single-wire connection or a CAN bus.
  • each glow plug separate power output stage provided.
  • Figure 2 only four output stages and only two glow plugs 28, 30 shown, in fact, however, just as many power amplifiers as Glow plugs used.
  • the power amplifiers are each with the Driver and protection circuit of the micro-controller control in conjunction with a current measuring unit, which in turn to the driver and protection circuit and to the terminal 29th connected.
  • a separate power amplifier can also be provided, 2 or more Glow plugs in a parallel circuit summarize and a glow plug group formed in this way with one final stage connect.
  • the connecting lines between the power output stages and the glow plugs 20 to 30 serve on the one hand, the glow plugs to supply with electrical energy.
  • the determination of the individual takes place via these lines Resistors and thus the temperature of the glow plugs.
  • their power supply is temporarily interrupted, and instead, a test voltage is applied to the glow plugs applied and the current flowing through the filament of the current Current measuring unit measured.
  • the controller the power amplifiers by means of the driver and protection circuit, the in turn is coupled to the microprocessor. From the measured current can be at a known test voltage in the usual Way the electrical resistance of the filament determined which in turn is assigned a certain temperature value can be.
  • the thus determined actual temperature is with the Target temperature of the glow plug compared, and from the temperature difference is used by the microprocessor for reaching the desired temperature required heating power calculated, the then fed to the glow plugs via the output stages becomes.
  • the glow plugs By repeated brief interruption of the heating power supply the glow plugs and determination of the respective Actual temperature is possible, the glow plugs inside heat up in a short time and in a stabilized manner on one To maintain target temperature.
  • the heating power supply is each interrupted for the duration of about 55 ms, so that within the glow plug, a temperature equilibrium established.
  • the current measurement to determine the resistance and therefore the temperature of the glow plug is at the end the interruption interval, the measuring time about 20 microseconds is and with a current measuring range of up to 200 Amp a smallest measurable resolution of about 1 amp is achieved.
  • the control of the glow plugs by means of the above described controller 32 may be such that the supplied heating current of the respective temperature difference between actual and set temperature corresponds.
  • the result resulting temperature and Schustromverlauf is in Figure 3 shown.
  • the Indian respective power output stage associated glow plug is initially a high heating current I supplied, so that the Glow candle heats up considerably. With increasing actual temperature the heating current supply is reduced. This has to Result that the actual temperature of the set temperature of Gradually approaches the glow plug.
  • Control of the glow plugs is the amplitude of the heating current I according to the temperature difference between actual and Desired temperature of the glow plug is reduced.
  • FIG. 5 shows in one upper diagram the adjusting curve of the glow plug temperature T as a function of time t, which is results when the glow plug corresponding to that in a lower Diagram driven in the figure 5 shown control becomes.
  • the lower diagram shows the glow plug control, i.e. the course of the glow plug current, depending on the time t.
  • the heating phase and then holding the temperature are not on the starting process of the diesel engine or on a maximum glow plug temperature limited, but can also to the so-called intermediate annealing with the engine running and at a determined by the diesel engine control annealing temperature be applied.
  • the Schusterzussel regularly interrupted for a duration of about 55 ms and on A temperature determination at the end of the interruption interval be carried out as with reference to the Figures 3 and 4 has already been explained.
  • a corresponding Temperature determination can both during the heating 55 as well as during the hold phase 60. Does that have the the respective output stage assigned glow plug not yet theirs Target temperature reached, then the corresponding power amplifier via the driver and protection circuit of the microprocessor so controlled that the glow plug consistently a heating current supplied with maximum amplitude. After reaching the setpoint temperature, the heating current is only clocked, i.e.
  • the duration of the interruption times i.e. the ratio of on / off times
  • the power amplifiers can be used by the microprocessor by comparing the Actual temperature with the target temperature of the respective glow plug be calculated.

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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)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (11)

  1. Procédé pour le fonctionnement d'un moteur diesel par commande du préchauffage d'une bougie de préchauffage lors duquel une puissance de chauffage électrique, dont la valeur est supérieure à la puissance permanente qui peut être amenée à la bougie de préchauffage en fonctionnement permanent sans dommage, est tout d'abord amenée à la bougie de préchauffage pendant la phase de chauffage jusqu'à ce qu'une température de consigne soit atteinte, la durée de la phase de chauffage étant mesurée de manière à ce que la bougie de préchauffage ne soit pas endommagée et lors duquel, à la fin de la phase de chauffage, la puissance de chauffage maximale de la bougie de préchauffage correspond à la puissance permanente et est réglée en mesurant la température des filaments spiralés de la bougie de préchauffage et en la comparant avec une température de consigne ainsi qu'en réglant la puissance de chauffage,
       caractérisé en ce que des bougies de préchauffage à crayon à chauffage rapide sont utilisées comme bougies de préchauffage, en ce que la température des filaments spiralés des bougies de préchauffage à crayon est mesurée par un dispositif de commande des bougies de préchauffage, en ce que des données sur les états des bougies de préchauffage comprenant la température des bougies de préchauffage sont transmises par la commande des bougies de préchauffage à une commande de moteur, en ce que la température de consigne est prescrite à la commande des bougies de préchauffage par la commande du moteur et en ce que la commande des bougies de préchauffage commande chaque bougie de préchauffage par un étage de puissance final séparé.
  2. Procédé selon la revendication 1, caractérisé en ce que le réglage sur la température de consigne a lieu pendant toute la durée de fonctionnement du moteur.
  3. Procédé selon une des revendications précédentes, caractérisé en ce que la tension nominale des bougies est choisie inférieure à la tension nominale de bord.
  4. Procédé selon la revendication 3, caractérisé en ce que la tension nominale permettant d'atteindre la puissance nominale des bougies de préchauffage correspond à environ la moitié de la tension nominale de bord disponible.
  5. Procédé selon une des revendications précédentes, caractérisé en ce que, en cas d'interruption du démarrage et de redémarrage après une brève durée, la quantité d'énergie et/ou le temps d'action pour la première impulsion de chauffage de démarrage rapide sont à nouveau calculés et réglés par contrôle de la température des bougies de préchauffage.
  6. Procédé selon une des revendications précédentes, caractérisé en ce que lors de chaque procédure de préchauffage pendant le fonctionnement du moteur, la température actuelle de la pointe de la bougie de préchauffage est mesurée et en ce que l'énergie électrique nécessaire pour atteindre la température de consigne est déterminée.
  7. Procédé selon la revendication 6, caractérisé en ce que, pendant le fonctionnement permanent de la bougie de préchauffage, la puissance de chauffage de la bougie de préchauffage est réglée en déterminant la température des filaments spiralés, en ce qu'une différence de température est déterminée par comparaison avec la température de consigne et en ce que la puissance de chauffage permettant d'atteindre la température de consigne est réglée sur une valeur correspondant à la différence de température déterminée.
  8. Procédé selon une des revendications précédentes, caractérisé en ce que l'alimentation en puissance de chauffage est brièvement interrompue par la commande des bougies de préchauffage pour déterminer la température des filaments spiralés de la bougie de préchauffage à crayon et en ce que la température est alors mesurée.
  9. Procédé selon la revendication 8, caractérisé en ce que l'alimentation en puissance de chauffage est interrompue pratiquement jusqu'à ce qu'un équilibre de température soit atteint à l'intérieur des filaments spiralés.
  10. Procédé selon les revendications 8 ou 9, caractérisé en ce que l'alimentation en puissance de chauffage est interrompue pendant environ 50 à 60 ms.
  11. Procédé selon une des revendications précédentes, caractérisé en ce que des bougies de préchauffage qui supportent pendant une brève période la tension nominale double sans être endommagées sont utilisées.
EP97108081A 1996-05-21 1997-05-17 Méthode et dispositif de commande de préchauffage des bougies de réchauffage d'un moteur diesel Expired - Lifetime EP0809021B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19620258 1996-05-21
DE19620258 1996-05-21
DE19708430A DE19708430A1 (de) 1996-05-21 1997-03-01 Verfahren und Vorrichtung zur Steuerung des Glühvorgangs einer Glühkerze eines Dieselmotors
DE19708430 1997-03-01

Publications (3)

Publication Number Publication Date
EP0809021A2 EP0809021A2 (fr) 1997-11-26
EP0809021A3 EP0809021A3 (fr) 1999-08-04
EP0809021B1 true EP0809021B1 (fr) 2005-01-19

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EP97108081A Expired - Lifetime EP0809021B1 (fr) 1996-05-21 1997-05-17 Méthode et dispositif de commande de préchauffage des bougies de réchauffage d'un moteur diesel

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EP (1) EP0809021B1 (fr)
ES (1) ES2237782T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007029022A1 (de) * 2007-06-23 2008-12-24 Beru Ag Glühsystem, Steuereinrichtung und Verfahren zur Leistungssteuerung einer Glühkerze
EP2177743A2 (fr) 2008-10-18 2010-04-21 MAN Nutzfahrzeuge Aktiengesellschaft Installation d'allumage de flamme et son procédé de commande
US8620512B2 (en) 2006-09-12 2013-12-31 Markus KERNWEIN Method for tracking defective functions in operation of motor vehicles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10162253A1 (de) * 2001-12-18 2003-07-10 Daimler Chrysler Ag Glüh- und Ionenstrommeßvorrichtung für einen Dieselmotor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137885A (en) * 1977-10-11 1979-02-06 General Motors Corporation Diesel engine glow plug energization control circuit
US4444160A (en) * 1982-09-09 1984-04-24 General Motors Corporation Energization indication control for diesel glow plug
JPH02149771A (ja) * 1988-11-30 1990-06-08 Diesel Kiki Co Ltd 燃焼式ヒータのグロープラグ印加電圧制御装置
US4934349A (en) * 1987-04-22 1990-06-19 Mitsubishi Denki Kabushiki Kaisha Glow plug controlling apparatus for a diesel engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2547757B2 (ja) * 1987-02-27 1996-10-23 日産自動車株式会社 デイ−ゼル機関のグロ−制御装置
ES2048187T3 (es) * 1987-11-09 1994-03-16 Siemens Ag Procedimiento para la regulacion de la temperatura de bujias de arranque en motores diesel y disposicion de circuito para la realizacion del procedimiento.
US5144922A (en) * 1990-11-01 1992-09-08 Southwest Research Institute Fuel ignition system for compression ignition engines
FR2689569B1 (fr) * 1992-04-07 1996-06-14 Renault Perfectionnements aux moteurs diesel.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137885A (en) * 1977-10-11 1979-02-06 General Motors Corporation Diesel engine glow plug energization control circuit
US4444160A (en) * 1982-09-09 1984-04-24 General Motors Corporation Energization indication control for diesel glow plug
US4934349A (en) * 1987-04-22 1990-06-19 Mitsubishi Denki Kabushiki Kaisha Glow plug controlling apparatus for a diesel engine
JPH02149771A (ja) * 1988-11-30 1990-06-08 Diesel Kiki Co Ltd 燃焼式ヒータのグロープラグ印加電圧制御装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8620512B2 (en) 2006-09-12 2013-12-31 Markus KERNWEIN Method for tracking defective functions in operation of motor vehicles
DE102007029022A1 (de) * 2007-06-23 2008-12-24 Beru Ag Glühsystem, Steuereinrichtung und Verfahren zur Leistungssteuerung einer Glühkerze
DE102007029022B4 (de) * 2007-06-23 2009-05-14 Beru Ag Glühsystem, Steuereinrichtung und Verfahren zur Leistungssteuerung einer Glühkerze
EP2177743A2 (fr) 2008-10-18 2010-04-21 MAN Nutzfahrzeuge Aktiengesellschaft Installation d'allumage de flamme et son procédé de commande
DE102008052309A1 (de) 2008-10-18 2010-04-22 Man Nutzfahrzeuge Aktiengesellschaft Flammstartanlage und Verfahren zu deren Steuerung

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EP0809021A2 (fr) 1997-11-26
EP0809021A3 (fr) 1999-08-04
ES2237782T3 (es) 2005-08-01

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