EP0318350B1 - Verfahren und Vorrichtung zur Steuerung der Vorheizung in einer Dieselmaschine - Google Patents

Verfahren und Vorrichtung zur Steuerung der Vorheizung in einer Dieselmaschine Download PDF

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Publication number
EP0318350B1
EP0318350B1 EP19880402825 EP88402825A EP0318350B1 EP 0318350 B1 EP0318350 B1 EP 0318350B1 EP 19880402825 EP19880402825 EP 19880402825 EP 88402825 A EP88402825 A EP 88402825A EP 0318350 B1 EP0318350 B1 EP 0318350B1
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EP
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Prior art keywords
supply
power
glow plugs
engine
process according
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EP19880402825
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English (en)
French (fr)
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EP0318350A1 (de
Inventor
Patrick Gidoin
Didier Gilbert
Michel Louis Gabadou
Bernard Bonhomme
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Regie Nationale des Usines Renault
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Regie Nationale des Usines Renault
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    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression 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
    • F02P19/021—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 relates to a method and a device for controlling the supply of glow plugs to a diesel engine. It is well known that a diesel engine requires a certain temperature for the ignition of the air-fuel mixture, for spontaneous combustion. When the engine is cold, the compression of the mixture alone does not allow the ignition temperature to be reached and the mixture must then be preheated by means of glow plugs.
  • the glow plugs fitted to diesel engines are electronically controlled so as to regulate the duration of preheating. Thanks to this electronic control, it is even planned to power these spark plugs during engine operation after starting in order to improve combustion, thus avoiding unstable rpm and rising smoke while reducing noise.
  • This post-heating of the mixture is obtained by the continuous feeding of the candles, which is however cut off, either when the temperature of the candles exceeds a threshold, or by a time delay.
  • the object of the present invention is to provide a method for controlling the glow plugs of a diesel engine incorporating post-heating without problem of plug resistance with a constant electrical balance, intended to reduce smoke emissions when cold and at improve the regularity of the engine speed.
  • a control device for these glow plugs comprises an electronic unit 3 supplied by the vehicle battery and comprising a circuit microprocessor 4 controlling power relays 40 intended to direct the power coming from the battery towards the spark plugs 2i.
  • the information on the engine water temperature is indicated to the microprocessor 4 by a thermal switch 5.
  • the engine load information is also delivered to the microprocessor 4 by the position of the load lever 6 of the pump injecting the fuel into the engine cylinders 1.
  • a warning light 8 indicates that the spark plugs 2i are igniting or extinguishing.
  • the candle feed control method according to the invention has three main phases, as shown in the operating diagram in FIG. 2.
  • the first conventional phase of glow plug preheating takes place between the instant in which the engine is brought into contact and the instant td of starting and its duration T1 is controlled by the engine compartment temperature.
  • the water thermal switch 5 closes if the water temperature reaches a given threshold.
  • the extinction of the preheating warning light 8 after a period of T0, indicates that the vehicle is ready to start.
  • the glow plugs remain under tension in order to maintain the temperature at a value essential for the initiation of the combustion of air-fuel mixture.
  • all the glow plugs are fed simultaneously.
  • the second phase of the control process takes place from the start of the engine, from time td and for a period T2 fixed, counted from the instant tD at the end of the start sequence.
  • the method comprises a third phase of controlling the supply of the N candles, alternately by group of n candles so that the product of the number of groups of candles, ie N / n , by the feed-in duty cycle of each group, either R, or equal to unity: NOT not x R 1
  • the method according to the invention can control the supply of the spark plugs, one after the other with a feed cyclic ratio equal to 1/4 or else two groups of two candles each, one after the other, with a duty cycle of 1/2.
  • This third phase of controlling the alternating supply of the N spark plugs has a duration referenced T3 in FIG. 2, which is a function either of the engine water temperature or of the engine load known by the position of the load lever fuel injection pump.
  • the supply of the spark plugs according to the invention is also subject to the water temperature ⁇ of the engine so that, if it exceeds a maximum threshold, 60 ° C. for example, the supply of the spark plugs post-heating is permanently cut to prevent deterioration.
  • the thermal switch 5 closes as soon as this maximum temperature ⁇ is reached.
  • a definitive interruption of the alternating post-heating phase is provided by a maximum use delay, of duration TMAX from the instant tD of end of start sequence. If the engine stalls after starting, the system is protected against battery discharge.

Landscapes

  • 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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Claims (7)

  1. Verfahren zur Steuerung der Versorgung der Vorheizglühkerzen in einem Dieselmotor, wobei in einer ersten Phase der Dauer T1 sie gleichzeitig versorgt werden, um das Luft-Brennstoff-Gemisch des Motors vor dem Starten vorzuheizen und um danach, in einer zweiten Phase der Dauer T2 nach dem Starten, sie gleichzeitig zu versorgen im Hinblick auf die Nachheizung, dadurch gekennzeichnet, daß es eine dritte Phase zur abwechselnden Versorgung von in n Gruppen unterteilten N Kerzen aufweist, dergestalt, daß das Produkt aus der Anzahl der Gruppen von Kerzen, d.h. N/n, mit dem Verhältnis der Versorgung pro Zyklus für jede Gruppe, d.h. R, gleich 1 ist:

    R x N/n = 1
    Figure imgb0005

    und daß außerdem:
    - eine zeitweise Unterbrechung der Versorgung der Kerzen erfolgt infolge einer Information über die Motorvolllast und
    - eine endgültige Unterbrechung der Versorgung der Kerzen erfolgt, entweder infolge einer Information, wenn die Wassertemperatur des Motors eine vorgegebene Schwelle überschreitet oder infolge einer maximalen Verzögerungszeit des Einsatzes Tmax ab dem Starten.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für einen Motor mit vier Zylindern die Versorgung der vier Kerzen nacheinander erfolgt mit einem Verhältnis der Versorgung pro Zyklus von einem Viertel.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für einen Motor mit vier Zylindern die Versorgung der vier Kerzen in Gruppen von jeweils zwei Kerzen nacheinander erfolgt, mit einem Verhältnis der Versorgung pro Zyklus von einer Hälfte.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für einen Motor mit sechs Zylindern die Versorgung der sechs Kerzen nacheinander erfolgt, mit einem Verhältnis der Versorgung pro Zyklus von einem Sechstel.
  5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für einen Motor mit sechs Zylindern die Versorgung der sechs Kerzen in Gruppen von jeweils zwei erfolgt, mit einem Verhältnis der Versorgung pro Zyklus von einem Drittel.
  6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für einen Motor mit sechs Zylindern die Versorgung der sechs Kerzen in Gruppen von jeweils drei Kerzen erfolgt, mit einem Verhältnis der Versorgung pro Zyklus von einer Hälfte.
  7. Vorrichtung zur Steuerung der Versorgung der Glühkerzen (2i) eines Dieselmotors (1) zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie eine elektronische Schaltung (3) aufweist, die von der Fahrzeugbatterie gespeist wird, einen Mikroprozessor (4) aufweist, welcher Leistungsrelais (40) steuert, die den von der Batterie stammenden Strom zu den Glühkerzen (2i) leiten, wobei dem Mikroprozessor (4) Informationen über die Wassertemperatur des Motors über einen Thermofühler (5) und Informationen über die Motorlast durch die Stellung des Steuerhebels (6) der Einspritzpumpe zugeführt werden.
EP19880402825 1987-11-24 1988-11-10 Verfahren und Vorrichtung zur Steuerung der Vorheizung in einer Dieselmaschine Expired - Lifetime EP0318350B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8716279 1987-11-24
FR8716279A FR2623565B1 (fr) 1987-11-24 1987-11-24 Procede de commande d'alimentation des bougies de prechauffage d'un moteur diesel

Publications (2)

Publication Number Publication Date
EP0318350A1 EP0318350A1 (de) 1989-05-31
EP0318350B1 true EP0318350B1 (de) 1993-02-10

Family

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Family Applications (1)

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EP19880402825 Expired - Lifetime EP0318350B1 (de) 1987-11-24 1988-11-10 Verfahren und Vorrichtung zur Steuerung der Vorheizung in einer Dieselmaschine

Country Status (4)

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EP (1) EP0318350B1 (de)
DE (1) DE3878414T2 (de)
ES (1) ES2037863T3 (de)
FR (1) FR2623565B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689569B1 (fr) * 1992-04-07 1996-06-14 Renault Perfectionnements aux moteurs diesel.
DE19922958C2 (de) * 1999-05-19 2003-10-30 Daimler Chrysler Ag Steuervorrichtung
DE102007003854A1 (de) * 2007-01-25 2008-08-07 Siemens Ag Verfahren zum Steuern eines Glühsystems für Dieselmotoren

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1242412B (de) * 1965-07-14 1967-06-15 Bosch Gmbh Robert Gluehstromanlage zum Beheizen der Gluehkerzen einer mehrzylindrigen Brennkraftmaschine
DE2610905A1 (de) * 1976-03-16 1977-09-22 Karl Dr Fracke Blitz-gluehzuendung fuer ottomotoren
JPS59141771A (ja) * 1983-02-03 1984-08-14 Nippon Denso Co Ltd ディ−ゼル機関制御装置
JPS60166759A (ja) * 1984-02-10 1985-08-30 Ngk Spark Plug Co Ltd グロ−プラグの通電制御方法および装置
DE3428619A1 (de) * 1984-08-03 1986-02-13 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur steuerung und/oder regelung einer brennkraftmaschine
DE3713835A1 (de) * 1987-04-24 1988-11-03 Beru Werk Ruprecht Gmbh Co A Verfahren und vorrichtung zum schnellaufheizen einer elektrischen heizvorrichtung

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Publication number Publication date
FR2623565B1 (fr) 1990-03-23
ES2037863T3 (es) 1993-07-01
FR2623565A1 (fr) 1989-05-26
DE3878414T2 (de) 1993-07-29
EP0318350A1 (de) 1989-05-31
DE3878414D1 (de) 1993-03-25

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