EP1929151A1 - Procede de commande d'un groupe de bougies de prechauffage d'un moteur diesel - Google Patents

Procede de commande d'un groupe de bougies de prechauffage d'un moteur diesel

Info

Publication number
EP1929151A1
EP1929151A1 EP06805793A EP06805793A EP1929151A1 EP 1929151 A1 EP1929151 A1 EP 1929151A1 EP 06805793 A EP06805793 A EP 06805793A EP 06805793 A EP06805793 A EP 06805793A EP 1929151 A1 EP1929151 A1 EP 1929151A1
Authority
EP
European Patent Office
Prior art keywords
glow
glow plug
pulse width
resistance
voltage
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Withdrawn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
EP06805793A
Other languages
German (de)
English (en)
Inventor
Markus Kernwein
Olaf Toedter
Andreas Bleil
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
Beru AG
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 DE102006010083A external-priority patent/DE102006010083B4/de
Priority claimed from DE102006010082A external-priority patent/DE102006010082B4/de
Priority claimed from DE102006010081A external-priority patent/DE102006010081B4/de
Application filed by Beru AG filed Critical Beru AG
Publication of EP1929151A1 publication Critical patent/EP1929151A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F02P19/021—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 characterised by power delivery controls
    • F02P19/022—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 characterised by power delivery controls using intermittent current supply
    • 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
    • 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
    • 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
    • F02P19/026—Glow plug actuation during engine operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2024—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control switching a load after time-on and time-off pulses
    • F02D2041/2027—Control of the current by pulse width modulation or duty cycle control
    • 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
    • F02P19/021—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 characterised by power delivery controls
    • F02P19/023—Individual control of the glow plugs

Definitions

  • the invention is based on a method having the features specified in the preamble of claim 1. Such a method is in the article "The electronically controlled glow system ISS for diesel engines, published in DE-Z: MTZ Motortechnische Zeitschrift 61, (2000) 10, pp. 668-675 known.
  • FIG. 1 shows the block diagram of a glow plug control unit 1 for carrying out the known method.
  • This control unit comprises a microprocessor 2 with integrated digital-to-analog converter, a number of MOSFET power semiconductors 3 for switching on and off an equal number of glow plugs 4, an electrical interface 5 for connection to a motor control unit 6 and an internal power supply 7 for the microprocessor 2 and for the interface 5.
  • the internal power supply 7 has via the "terminal 15" of the vehicle connection to the vehicle battery.
  • the microprocessor 2 controls the power semiconductors 3, reads their status information and communicates via the electrical interface 5 with the engine control unit 6.
  • the interface 5 makes an adjustment of the signals required for communication between the engine control unit 6 and the microprocessor 2.
  • the power supply 7 supplies a stable voltage for the microprocessor 2 and for the interface 5.
  • a glow plug should maintain a constant temperature (nominal temperature or steady-state temperature), for which approx. 1000 ° C is a typical value.
  • steady-state temperature modern glow plugs do not require the full voltage from the vehicle electrical system, but only a voltage of typically 5 volts to 6 volts.
  • the microprocessor 2 controls the power semiconductors 3 for this purpose by a method of pulse width modulation, with the result that the voltage from the electrical system, which is the power semiconductors 3 via the "terminal 30" of the vehicle is modulated so that the desired voltage is applied to the glow plugs in the time average. Fluctuations in the vehicle electrical system voltage can be compensated by changing the switch-on time in the pulse width modulation.
  • the glow plugs in the cylinders of the engine are cooled to different degrees. Nevertheless, in order to keep the glow plug temperature constant when the engine is warm, the electric power supplied to the glow plugs is adapted to the changing conditions. This is done in accordance with the specifications of the engine control unit 6 by raising or lowering the same for all glow plugs final value of the voltage applied to the glow plugs 4 on average over time.
  • the present invention has for its object to provide a way how the ignition performance of a diesel engine and the life of the glow plugs used therein can be improved.
  • a group of glow plugs in a diesel engine apart from manufacturing tolerances are preferably equal to each other and are connected by individual leads to a DC power source, driven by a pulse width modulation method to the glow plugs in any case To operate temporally at the same temperature.
  • the electrical resistance of the glow plugs minus the resistance of the supply line to the glow element of the glow plugs during operation of the engine is determined and calculated from a relative pulse width with which the glow plugs are driven.
  • the glow plugs can be controlled uniformly and in total as a group. This is particularly useful if there is an average value for the resistance of the leads leading to the glow elements, from which the resistance of the individual leads deviates so little that by simplifying the average value of the resistance of the leads nor an approximation is available to the true value of the resistance of the heating elements, which allows a more precise control of their heating. It is also possible to uniformly control subgroups of glow plugs of an engine. However, it is preferred to individually and individually control the glow plugs, because then the influence of the resistance of the different supply lines and also the influence of the resistance of the different current paths in the control unit can be taken into account individually.
  • An advantage of the invention is that in addition to the resistance of the glow plug and other parameters which are suitable to influence the temperature of the individual glow plugs, used as input variables of the control of the glow plugs by Puls shimmerenmo- dulation and thus can be considered when driving the individual glow plugs ,
  • Such another parameter, which can be used with particular advantage as an input for the control by pulse width modulation, is the electrical resistance of the glow element of the glow plugs, which shows a production-related scattering.
  • the electrical resistance of their glow element during operation of the engine is determined for each individual glow plug, calculated from an individual relative pulse width and individually controlled with each individual glow plug of the engine.
  • the electrical resistance of glow plugs changes with age usually and leads in the prior art to a lower glow plug temperature, which entails a worse ignition behavior and starting behavior.
  • the change in the resistance of the glow plug is used as an input for controlling the glow plug by pulse width modulation to extend the relative pulse width corresponding to the changed glow plug resistance and thereby compensate for the change in resistance so that it does not lead to a reduction in the glow plug temperature.
  • a group of glow plugs in a diesel engine which - apart from manufacturing tolerances - are preferably equal to each other and are connected by individual leads to a DC power source, driven by a method of pulse width modulation to the glow plugs in any case
  • their resistance is determined for each individual glow plug, from which an individual relative pulse width is calculated, and thus each individual glow plug is controlled individually.
  • the electrical resistance of glow plugs changes with age usually and leads in the prior art to a lower glow plug temperature, which leads to a worse ignition behavior and starting behavior.
  • the change of the resistance of the glow plug is used as an input for the control of the glow plug by pulse width modulation to extend the relative pulse width according to the changed glow plug resistance and thereby compensate for the change in resistance so that it does not lead to a reduction in the glow plug temperature.
  • a group of glow plugs in a diesel engine which - apart from manufacturing tolerances - are preferably equal to each other and are connected by individual leads to a Gleichstromquel- Ie, driven by a method of pulse width modulation to the glow plugs in any case To operate temporal means at the same temperature.
  • the pulse width modulation method determines the energy to be introduced into the glow plugs per period.
  • supplying predetermined amounts of energy per period advantageously causes a predetermined Temperature rise of the glow elements of the glow plugs.
  • the supply of predetermined amounts of energy indirectly means a consideration of the resistance of the glow plugs and their supply line, which deal with the solutions according to claims 1 and 10.
  • the duration of a period in the cyclic activation of glow plugs is typically 10 ms to 100 ms, preferably 30 ms to 35 ms.
  • a certain amount of electric power can be supplied to the glow plug.
  • the actual energy introduced can be determined and input Energy loss or an excess of energy in one of the following periods are compensated. It is preferable to calculate the shortfall or surplus of energy introduced in a period in the next period and to settle it in the next period.
  • a measure of the energy supplied to the glow plugs is the product of the square of the voltage applied to the glow plug and the amount of time that the voltage is applied.
  • an amount of energy to be supplied to the glow plug of the glow plugs in each period is set, and based on the specifications of the glow plugs and taking into account a predetermined voltage of the DC power source, an initial pulse width determined while the voltage in the period considered located on the glow plugs.
  • the pulse width is then adjusted taking into account one or more parameters which influence the operating temperature of the glow plug of the glow plugs.
  • the relative pulse width is expediently changed by changing the absolute pulse width while the period remains the same. Under the period is understood here the sum of the duty cycle and the subsequent turn-off of a glow plug. However, it would also be possible to change the relative pulse width by keeping the absolute pulse width constant and instead changing the switch-off duration or the duration of a period as a whole.
  • the glow plugs are controlled as far as possible in succession, ie, the turn-on of the glow plugs are placed so that they connect to each other. If the sum of the pulse widths of the group of glow plugs exceeds the duration of one period, then the excess pulse width is transmitted to the following period in which it overlaps in time the starting times of the glow plugs which start there again.
  • the process can be carried out uniformly for the group of glow plugs. This does not take account of differences between the individual glow plugs, which result in the operating temperatures which reach the glow elements of the glow plugs of a motor when the engine is warm, not matching, but scattering.
  • the inventive method is preferably carried out separately for each glow plug and determines the pulse width separately for the introduction of a predetermined amount of energy in the glow plugs for each glow plug.
  • the electrical resistance of the glow plugs and in particular their glow element belongs.
  • the values of the electrical resistance can scatter considerably.
  • the resistance or the resistance of its heating element is determined for each individual glow plug, calculated from an individual relative pulse width and thus individually controlled each glow plug.
  • the electrical resistance of glow plugs changes with age usually and leads in the prior art to a lower glow plug temperature, which entails a worse ignition behavior and starting behavior.
  • the change in the resistance of the glow plug is used as an input for controlling the glow plug by pulse width modulation to extend the relative pulse width corresponding to the changed glow plug resistance and thereby compensate for the change in resistance so that it does not lead to a reduction in the glow plug temperature.
  • the relative pulse width is understood to be the pulse width related to the length of the period of the modulation.
  • the period duration is preferably kept constant and instead only the pulse width is changed. But it is also possible to maintain the pulse width and to change the period duration instead.
  • Another advantage of the invention is that in addition to the resistance of the glow plug and other parameters which are suitable to influence the temperature of the individual glow plugs, used as input variables of the control of the glow plugs by pulse width modulation and thus taken into account when driving the individual glow plugs can.
  • One such other parameter that can be used to advantage as an input to control by pulse width modulation is the voltage of the DC power source feeding the glow plugs, particularly the voltage of the battery of a vehicle equipped with the diesel engine. This voltage can vary depending on the current load, the temperature and the age of the battery, which fluctuation may be time dependent and different for the glow plugs of an engine.
  • Another parameter that can be used with particular advantage as an input for the control by pulse width modulation is the resistance of the supply line, which leads from the control unit of the glow plugs to the respective glow plug or to its glow element. Since the leads are of different lengths, this results in different lead resistances. They are in the supply line existing contact resistance, in particular of electrical connectors, add. For lead resistance one expediently expects the resistance of running in the respective glow plug, the actual annealing element ending supply line.
  • the resistance of a supply line from the glow plug control device to the glow element of the glow plug is typically 10 m ⁇ to 20 m ⁇ .
  • the resistance of the glow element of a glow plug at room temperature is typically 400 m ⁇ to 500 m ⁇ .
  • the resistance of the supply line to the glow element of the respective glow plug is preferably assumed to be constant, neglecting its manufacturing tolerances, preferably with its nominal value, which is given for a series of diesel engines by their design plan as a typical value.
  • the current flowing through the respective glow plug current is calculated, taking into account the known nominal value of the supply line resistance caused by the supply voltage drop and from this, taking into account the known or currently measured voltage of the DC power source calculated voltage actually drops on the glow plug and is used as input for the control by pulse width modulation.
  • the effective voltage drop across the glow element of the glow plug can be optimized and adjusted so accurately that the different resistances of the individual supply lines no longer or no longer appreciably affect the effective voltage drop across the glow element.
  • the control unit typically contains, for each glow plug as a current gate, a switchable power semiconductor, in particular a MOSFET, which is switched on and off by an arithmetic circuit, in particular by a microprocessor or a microcontroller.
  • the resistance of the current paths provided in the control unit for the individual glow plugs can advantageously be selected as a further parameter influencing the glow plug temperature and used as an input variable for the control of the voltage on the glow plugs as a function of time by means of pulse width modulation.
  • the current flowing through the respective glow plug is measured, taking into account the known nominal value of the resistor on the respective current path, preferably also taking into account the known nominal value of the resistance of the associated Zulei- direction from the control unit to the glow element of the glow plug, which calculates the voltage drop caused by the current path and calculates the voltage actually dropping on the glow plug or its glow element taking into account the known or measured voltage of the DC power source and calculates an input variable for the control by pulse width modulation.
  • the influence of the high current losses in the control unit on a scattering of the glow plug temperatures can be compensated.
  • a parameter which can be advantageously used as an input for controlling the effective voltage dropping across the glow plug or its glow element by pulse width modulation is the voltage of the DC power source feeding the glow plugs, in particular the voltage of the battery of one Diesel engine equipped vehicle. This voltage can vary depending on the current load, the temperature and the age of the battery, which fluctuation may be time dependent and different for the glow plugs of an engine.
  • Different glow plug types can differ in terms of different electrical resistances and / or due to different heat capacities. Different resistances can be detected by a current and voltage measurement, different heat capacities by different heating rates with the same heat output.
  • the ability to detect different types of glow plugs has two essentials Advantages: On the one hand, if necessary, different glow plugs can be used simultaneously in one and the same engine, because it is possible for the glow plug control device to nevertheless bring the different glow plugs to the same steady-state temperature.
  • the control unit by storing characteristic values, eg. B. the electrical resistance at a selected temperature of z. B. 2O 0 C, and / or characteristics of different glow plug types are able to automatically adjust to the built-in glow plug types. As a characteristic is particularly the dependence of the electrical resistance of the temperature into consideration.
  • the temperature of the glow plugs can be selected according to the invention and used as input for the control of the average voltage across the glow plugs by pulse width modulation, in particular to regulate the temperature of the respective glow plug to a desired value. If the resistance of the heating element is known, it is possible to deduce from the known dependence of the resistance of the heating element on the temperature of the current element of the heating element and take this as the actual value in a temperature controller in the glow plug control unit, in order to set it to a setpoint specified by the control unit to regulate.
  • Another parameter which can be taken into account in the pulse width modulation is the aging of the respective glow plug.
  • the useful life of the glow plug increases, its resistance usually changes, so that older glow plugs, which are activated in a conventional manner, show a decreasing annealing temperature as they age.
  • This can be counteracted according to the invention by individually taking into account the aging of the glow plugs.
  • the number of revolutions of the diesel engine that has occurred since its installation can be selected. This number can be supplied to the glow plug control unit by an engine control unit of the diesel engine or by means of a speed signal coming from a tachometer in the glow plug control unit itself.
  • the product is preferably selected from the square of the voltage dropped on the glow element of the glow plug and the duration of its contact with the glow plug. This product is determined for all or for selected periods of pulse width modulation and, for example, summed in a counter.
  • the product of the square of the voltage and the duration of its request need not be determined for all periods and then added up. For example, one could limit oneself to every hundredth or thousandth period. Preferably, however, all periods are taken into account, because this gives a more reliable statement about aging, without any additional expense, since the method can be implemented in software in the glow plug control unit, for which purpose the software that determines the method steps is stored in memory Microprocessor or microcontroller is stored.
  • counting stages are preset and each time the pulse width is adjusted according to the aging progress when they are reached.
  • the counting stages can be equally spaced from each other; in this case, it is advantageous, in the event of aging, which depends nonlinearly on the amount of energy introduced, to weight the energy amounts to be summed between two counting stages in accordance with the nonlinear dependence of the aging on the increasing amount of energy and thus to weight them.
  • the aging of the glow plugs can be used to control the pulse width in the manner be taken into account that a characteristic curve or a field of characteristic curves is formed, which indicate the electrical resistance of the glow element of a typical glow plug occurring at one or more specific temperatures as a function of the progressive aging.
  • the effective voltage is determined according to the invention, which has to drop at the glow element of the glow plugs, if they are to be supplied with a certain amount of energy per period for which the square of the product the voltage applied to the glow element and the relative pulse width is a measure.
  • the invention makes it possible to carry out a current correction of the relative pulse width on the basis of current measurements.
  • the invention makes it possible to predict future changes in the pulse width with which the individual glow plugs are driven, by modeling a model for the progressive change of a parameter which influences the temperature of the glow plug resulting from the pulse width modulation is formed. Based on this model, from one or more previously determined values of the parameter in question, a prediction for the value of the parameter in the near future and the predicted value of the parameter as an input for the control of the voltage applied to the respective glow plugs in the mean time by Pulse width modulation can be used.
  • the model is preferably formed from empirical data on the evolution of the particular parameter considered, but may also be developed based on theoretical considerations about the behavior of a glow plug.
  • the development of the resistance of the glow element of the glow plug is particularly suitable, so that a model is preferably formed for this development.
  • the model preferably indicates the change in the resistance of the glow plug for one or more selected temperatures as a function of the aging of the glow plug and can be stored in the form of a characteristic curve or a characteristic field in the glow plug control unit.
  • a measure of aging can - as previously mentioned - z.
  • B. the sum of the occurred since the installation of the glow plug number of revolutions of the diesel engine or the sum of the fed into the glow plug electrical energy can be selected.
  • the method according to the invention is particularly suitable for energy-controlled heating of the glow plugs.
  • the procedure defined by the pulse width modulation determines the periodic energy to be introduced into a single glow plug.
  • This energy value, which is to be introduced into the individual glow plug per period, is adjusted according to the invention by taking into account one or more parameters which are important for the temperature of the glow plug, so that the scattering of the temperatures of the glow plugs belonging to an engine is significantly reduced becomes.
  • the invention makes it possible to minimize the spread of glow plug temperatures by balancing parameters that affect glow plug temperatures.
  • the glow plugs can therefore be controlled more accurately than in the prior art.
  • both the life of the glow plugs and the nominal temperature, which should reach the glow plugs in continuous operation be raised.
  • the resistance of the glow plugs of the glow plugs can be determined more precisely from current and voltage, taking into account the line losses and the internal losses occurring in the glow plug control device, which can be derived from the constructive design of the glow plug control device and the supply lines, thus monitoring the condition of the glow plugs .
  • Experience from previous periods of pulse width modulation can be used to optimize the relative pulse width in later periods.
  • the influence of the individual aging of individual glow plugs can be compensated.
  • Future changes in the resistance of the heaters may be proactively compensated based on a model and / or by observing the aging-related change in the resistance of the heaters. It is even possible to detect and compensate for influences on the glow plug temperature, which result from different installation conditions and / or combustion cycles and / or charge changes in the various cylinders of the diesel engine, because the temperatures of the individual glow plugs are individually detected and taken into account in the determination of the relative pulse width can be.

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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)

Abstract

L'invention concerne un procédé de commande d'un groupe de bougies de préchauffage d'un moteur Diesel. Ces bougies sont raccordées à une source de tension continue par des câbles d'alimentation individuels et doivent fonctionner par un procédé de modulation d'impulsions en largeur en tout cas dans la moyenne temporelle à la même température. Selon l'invention, on calcule la résistance électrique des bougies de pré-chauffage de laquelle on soustrait la résistance du câble d'alimentation de l'élément incandescent de la bougie, lorsque le moteur est en marche, pour calculer une largeur d'impulsion relative avec laquelle les bougies sont commandées ou bien on détermine pour chaque bougie la résistance de son élément incandescent lorsque le moteur est en marche, ce qui permet de calculer une durée d'impulsion relative individuelle pour commander individuellement chaque bougie, ou encore la modulation en largeur d'impulsion permet de déterminer la période par énergie électrique à céder aux bougies de préchauffage.
EP06805793A 2005-09-21 2006-09-21 Procede de commande d'un groupe de bougies de prechauffage d'un moteur diesel Withdrawn EP1929151A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102005044854 2005-09-21
DE102006010083A DE102006010083B4 (de) 2005-09-21 2006-03-04 Verfahren zum Ansteuern einer Gruppe von Glühkerzen in einem Dieselmotor
DE102006010082A DE102006010082B4 (de) 2005-09-21 2006-03-04 Verfahren zum Ansteuern einer Gruppe von Glühkerzen in einem Dieselmotor
DE102006010081A DE102006010081B4 (de) 2005-09-21 2006-03-04 Verfahren zum Ansteuern einer Gruppe von Glühkerzen in einem Dieselmotor
PCT/EP2006/009176 WO2007033825A1 (fr) 2005-09-21 2006-09-21 Procede de commande d'un groupe de bougies de prechauffage d'un moteur diesel

Publications (1)

Publication Number Publication Date
EP1929151A1 true EP1929151A1 (fr) 2008-06-11

Family

ID=37497059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06805793A Withdrawn EP1929151A1 (fr) 2005-09-21 2006-09-21 Procede de commande d'un groupe de bougies de prechauffage d'un moteur diesel

Country Status (5)

Country Link
US (1) US7957885B2 (fr)
EP (1) EP1929151A1 (fr)
KR (1) KR101212461B1 (fr)
CN (1) CN101268274B (fr)
WO (1) WO2007033825A1 (fr)

Families Citing this family (34)

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DE102006010194B4 (de) 2005-09-09 2011-06-09 Beru Ag Verfahren und Vorrichtung zum Betreiben der Glühkerzen einer selbstzündenden Brennkraftmaschine
DE102006025834B4 (de) * 2006-06-02 2010-05-12 Beru Ag Verfahren zum Steuern einer Glühkerze in einem Dieselmotor
EP2122157A1 (fr) 2007-03-09 2009-11-25 Beru AG Procédé et dispositif de commande d'excitation de bougie de préchauffage
DE102007038131B3 (de) * 2007-07-06 2008-12-24 Beru Ag Verfahren zum Aufheizen einer keramischen Glühkerze und Glühkerzensteuergerät
GB2456784A (en) * 2008-01-23 2009-07-29 Gm Global Tech Operations Inc Glow plug control unit and method for controlling the temperature in a glow plug
DE102008007394A1 (de) * 2008-02-04 2009-08-06 Robert Bosch Gmbh Verfahren zur Steuerung von einer Mehrzahl von Glühstiftkerzen in einem Brennkraftmotor und Motorsteuergerät
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US20100094523A1 (en) 2010-04-15
US7957885B2 (en) 2011-06-07
KR20080046700A (ko) 2008-05-27
KR101212461B1 (ko) 2012-12-14
CN101268274B (zh) 2010-12-01
CN101268274A (zh) 2008-09-17

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