EP0816673B1 - Method of operating a flame starting system for internal combustion engine and flame starting system for internal combustion engine - Google Patents

Method of operating a flame starting system for internal combustion engine and flame starting system for internal combustion engine Download PDF

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Publication number
EP0816673B1
EP0816673B1 EP97109978A EP97109978A EP0816673B1 EP 0816673 B1 EP0816673 B1 EP 0816673B1 EP 97109978 A EP97109978 A EP 97109978A EP 97109978 A EP97109978 A EP 97109978A EP 0816673 B1 EP0816673 B1 EP 0816673B1
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EP
European Patent Office
Prior art keywords
flame
fuel
internal combustion
combustion engine
glow plug
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Expired - Lifetime
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EP97109978A
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German (de)
French (fr)
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EP0816673A1 (en
Inventor
Andreas Bäumer
Martin Eller
Thomas Spannbauer
Ulrich Stephan
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BERU RUPRECHT AG
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Beru AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
    • F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
    • F02N19/06—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of combustion-air by flame generating means, e.g. flame glow-plugs
    • 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

Definitions

  • the invention relates to a method for operating a Flame start system for an internal combustion engine, especially one Diesel engine with a flame glow plug in the air intake duct of the Internal combustion engine is arranged and supplied with fuel as well as a flame start system for an internal combustion engine, especially a diesel engine with a flame glow plug, which in Air intake duct of the internal combustion engine is arranged and over a fuel line is supplied with fuel.
  • Such a flame start system with a flame glow plug is from DE 4 032 758, known from DE 4 243 959 A1 and DE 4 243 965 A1 and serves to enable a cold start of the internal combustion engine.
  • the flame glow plug with a fixed or each variable depending on engine operating parameters Fuel metering supplied on a high Heat output designed at idle speed of the internal combustion engine is.
  • Fuel metering supplied on a high Heat output designed at idle speed of the internal combustion engine is.
  • the result is that with internal combustion engines with small displacement or internal combustion engines with a low one Compression problems occur in the tempering phase that point to it base that the flame of the flame glow plug has too much oxygen consumed and therefore a relative lack of oxygen for the Machine occurs. Because of such a lack of oxygen does not find sufficient combustion in the internal combustion engine instead, what is white smoke formation from unburned fuel and results in condensation. If the continue Flame glow plug has a small nozzle or orifice design the fuel supply to the flame glow plug at higher speed the internal combustion engine too low.
  • the object underlying the invention is in contrast therein, a method of operating a flame start system and a flame start system for an internal combustion engine of the type mentioned at the beginning, with which a reliable Operation of the internal combustion engine over the entire speed range is possible.
  • the flame start system according to the invention is defined in claim 4.
  • the fuel supply i.e. the fuel flow at the flame glow plug fixed nozzle size and given pre-pressure in the starting phase, avoiding start problems due to lack of oxygen become. It is still possible to supply fuel the flame glow plug optimally over the entire speed range dosing.
  • the internal combustion engine can be adjusted, results better emission behavior and the smoke emission reduced after starting the internal combustion engine.
  • one at cold start Internal combustion engine especially a diesel engine through the Flame glow plug of a flame start system initially 20 to 30 seconds long preheated.
  • the starter and the starter of the internal combustion engine the fuel supply the flame glow plug is picked up by the air sucked in the air intake duct and that through the flame glow plug prepared fuel ignited a flame.
  • the start-up phase is followed by an after-flame phase.
  • FIGS. 1 and 2 the one shown in FIGS. 1 and 2 is shown Flame start system, which has a flame glow plug 1, which is supplied with fuel via a fuel line 5, with a valve for controlling the amount of fuel, namely one Solenoid valve 2 provided in the fuel line 5 for Supply of the flame glow plug is arranged. Via a control section 3, the solenoid valve 2 is controlled so that the fuel supply for the flame glow plug especially in the starting phase and throttled at low engine speed is so that the flame occurring at the flame glow plug does not consumed too much oxygen.
  • FIGS. 1 and 2 are 2 clock signals on the solenoid valve, from the control part 3 generated depending on the respective operating phases become.
  • the control part 3 can in particular clock signals with varying Clock frequency fx and / or clock length tx, i.e. opening time of the solenoid valve 2 deliver.
  • the control part 3 lies in the starting phase clock signals with a relatively low clock frequency fx on solenoid valve 2 so that the amount of fuel supply the flame glow plug 1 is reduced accordingly.
  • the clock frequency fx of the clock signal from the control part 3 and thus the amount of fuel supply to the flame glow plug 1 to.
  • Different clock frequencies can be driven around the control section Height of the fuel supply to the flame glow plug 1 accordingly to control or to dose. If after about 40 seconds Internal combustion engine running at a higher speed can over a detection of the respective speed of the internal combustion engine the clocking of the solenoid valve 2 can be stopped, so that the solenoid valve 2 is constantly open.
  • acts Hose that the part of the fuel supply line 5 between the solenoid valve 2 and the flame glow plug 1 forms as Buffer, but it can also be a fuel storage 4 in the fuel supply line 5 between the flame glow plug 1 and the solenoid valve 2 may be arranged.
  • Farther can choke 6, 7 in front of and / or behind the solenoid valve 2 and / or be provided in front of the flame glow plug.
  • the buffer, the fuel accumulator and the throttle plates ensure you uniform fuel flow and fuel degradation and this reduces the pulsation of the flame on the flame glow plug 1.
  • the throttle orifices 6 and 7 have similar to one Delay function to throttle the pressure.
  • Using a flame start system with the one described above Construction can take place over the entire speed range of the internal combustion engine and with different pressure conditions in the fuel supply the flame glow plug stabilizes their burning behavior and optimized that improved cold start properties the internal combustion engine and the emissions in warm-up mode as well as in idle and overrun conditions are reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

A procedure for operating a flame starting system for a diesel engine uses a glow plug in the air induction channel, supplied with fuel. The fuel supply is metered according to the operating phase of the engine and is cycled using a chosen frequency or period. There is a solenoid valve in the plug to control the fuel flow. There is a buffer between the valve and the plug. The buffer is a fuel store. In front of or behind the valve are throttle screens.

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Flammstartanlage für eine Brennkraftmaschine, insbesondere einen Dieselmotor mit einer Flammglühkerze, die im Luftansaugkanal der Brennkraftmaschine angeordnet ist und mit Kraftstoff versorgt wird, sowie eine Flammstartanlage für eine Brennkraftmaschine, insbesondere einen Dieselmotor mit einer Flammglühkerze, die im Luftansaugkanal der Brennkraftmaschine angeordnet ist und über eine Kraftstoffleitung mit Kraftstoff versorgt wird.The invention relates to a method for operating a Flame start system for an internal combustion engine, especially one Diesel engine with a flame glow plug in the air intake duct of the Internal combustion engine is arranged and supplied with fuel as well as a flame start system for an internal combustion engine, especially a diesel engine with a flame glow plug, which in Air intake duct of the internal combustion engine is arranged and over a fuel line is supplied with fuel.

Eine derartige Flammstartanlage mit einer Flammglühkerze ist aus der DE 4 032 758, der DE 4 243 959 A1 sowie der DE 4 243 965 A1 bekannt und dient dazu einen Kaltstart der Brennkraftmaschine zu ermöglichen.Such a flame start system with a flame glow plug is from DE 4 032 758, known from DE 4 243 959 A1 and DE 4 243 965 A1 and serves to enable a cold start of the internal combustion engine.

Bei den bekannten Flammstartanlagen wird die Flammglühkerze mit einer festen oder each in Abhängigkeit von Motorbetriebsparametern variablen Kraftstoffdosierung versorgt, die auf eine hohe Wärmeleistung bei Leerlaufdrehzahl der Brennkraftmaschine ausgelegt ist. Das hat zur Folge, daß bei Brennkraftmaschinen mit kleinem Hubraum oder Brennkraftmaschinen mit einer niedrigen Verdichtung Probleme in der Anlaßphase auftreten, die darauf beruhen, daß die Flamme der Flammglühkerze zu viel Sauerstoff verbraucht und daher ein relativer Sauerstoffmangel für die Maschine auftritt. Aufgrund eines derartigen Sauerstoffmangels findet keine ausreichende Verbrennung in der Brennkraftmaschine statt, was eine Weißrauchbildung durch unverbrannten Kraftstoff und eine Kondensatbildung zur Folge hat. Wenn weiterhin die Flammglühkerze eine kleine Düsen- oder Blendenauslegung hat, ist die Kraftstoffversorgung der Flammglühkerze bei höherer Drehzahl der Brennkraftmaschine zu gering.In the known flame start systems, the flame glow plug with a fixed or each variable depending on engine operating parameters Fuel metering supplied on a high Heat output designed at idle speed of the internal combustion engine is. The result is that with internal combustion engines with small displacement or internal combustion engines with a low one Compression problems occur in the tempering phase that point to it base that the flame of the flame glow plug has too much oxygen consumed and therefore a relative lack of oxygen for the Machine occurs. Because of such a lack of oxygen does not find sufficient combustion in the internal combustion engine instead, what is white smoke formation from unburned fuel and results in condensation. If the continue Flame glow plug has a small nozzle or orifice design the fuel supply to the flame glow plug at higher speed the internal combustion engine too low.

Bei den bekannten Flammstartanlagen erfolgt eine Kraftstoffdosierung z.B. über die Größe der in der Flammglühkerze verwendeten Düse oder Blende und den Kraftstoffdruck. Die Kraftstoffmenge kann von der Flammstartanlage selbst weder gesteuert noch geregelt werden. Die Kraftstoffdrücke in den verschiedenen Systemen bei den Motor- und Kraftfahrzeugherstellern sind aber über den gesamten Drehzahlbereich so verschieden, daß eine derartige Dosierung des Kraftstoffes für die Flammglühkerze nicht ausreicht, um die Brennkraftmaschine bei sehr tiefen Temperaturen zu starten.In the known flame start systems, fuel is metered e.g. about the size of that in the flame glow plug used nozzle or orifice and the fuel pressure. The amount of fuel cannot be controlled by the flame start system itself still to be regulated. The fuel pressures in the different Systems at the motor and motor vehicle manufacturers are So different over the entire speed range that such Dosing of fuel for the flame glow plug is not sufficient to the internal combustion engine at very low temperatures to start.

Die der Erfindung zugrunde liegende Aufgabe besteht demgegenüber darin, ein Verfahren zum Betreiben einer Flammstartanlage sowie eine Flammstartanlage für eine Brennkraftmaschine der eingangs genannnten Art anzugeben, mit denen ein zuverlässiger Betrieb der Brennkraftmaschine über den gesamten Drehzahlbereich möglich ist.The object underlying the invention is in contrast therein, a method of operating a flame start system and a flame start system for an internal combustion engine of the type mentioned at the beginning, with which a reliable Operation of the internal combustion engine over the entire speed range is possible.

Diese Aufgabe wird gemäß der Erfindung bei dem erfindungsgemäßen Verfahren nach Anspruch 1 gelost.This object is achieved according to the invention in the invention Method according to claim 1 solved.

Die erfindungsgemäße Flammstartanlage ist in Anspruch 4 definiert.The flame start system according to the invention is defined in claim 4.

Gemäß der Erfindung ist es möglich, die Kraftstoffversorgung, d.h. den Kraftstoffdurchfluß an der Flammglühkerze bei fester Düsengröße und gegebenem Vordruck in der Anlaßphase abzusenken, wodurch Startprobleme wegen Sauerstoffmangels vermieden werden. Es ist weiterhin möglich, die Kraftstoffversorgung der Flammglühkerze über den gesamten Drehzahlbereich optimal zu dosieren.According to the invention it is possible to change the fuel supply, i.e. the fuel flow at the flame glow plug fixed nozzle size and given pre-pressure in the starting phase, avoiding start problems due to lack of oxygen become. It is still possible to supply fuel the flame glow plug optimally over the entire speed range dosing.

Da somit die Flammengröße der Flammglühkerze an den Luftdurchsatz der Brennkraftmaschine angepaßt werden kann, ergibt sich ein besseres Emissionsverhalten und wird der Rauchausstoß nach dem Anlassen der Brennkraftmaschine vermindert.Since the flame size of the flame glow plug is related to the air flow the internal combustion engine can be adjusted, results better emission behavior and the smoke emission reduced after starting the internal combustion engine.

Besonders bevorzugte Ausführungsbeispiele des erfindungsgemäßen Verfahrens sowie der erfindungsgemäßen Flammstartanlage sind Gegenstand der Patentansprüche 2 und 4 bis 7 jeweils.Particularly preferred embodiments of the invention Process and the flame start system according to the invention are the subject of claims 2 and 4 to 7 each.

Im folgenden wird anhand der zugehörigen Zeichnung ein besonders bevorzugtes Ausführungsbeispiel der Erfindung näher beschrieben. Es zeigen

  • Fig. 1 ein schematisches Diagramm des Aufbaus der Flammstartanlage,
  • Fig. 2 den Kraftstoffversorgungsteil der Flammglühkerze der in Fig. 1 dargestellten Flammstartanlage im einzelnen,
  • Fig. 3 in einem Diagramm den Betrieb der Flammstartanlage insbesondere der Flammglühkerze in den verschiedenen Betriebsphasen einer Brennkraftmaschine gegenüber der Zeit und
  • Fig. 4 in einem Diagramm die am Magnetventil der Flammstartanlage gemäß Fig. 1 liegenden Taktsignale gegenüber der Zeit.
    • A particularly preferred exemplary embodiment of the invention is described in more detail below with reference to the accompanying drawing. Show it
  • 1 is a schematic diagram of the structure of the flame start system,
  • 2 the fuel supply part of the flame glow plug of the flame start system shown in FIG. 1 in detail,
  • Fig. 3 in a diagram the operation of the flame start system, in particular the flame glow plug in the different operating phases of an internal combustion engine over time and
  • FIG. 4 shows the clock signals on the solenoid valve of the flame start system according to FIG. 1 in relation to time.

    • Wie es in Fig. 3 dargestellt ist, wird beim Kaltstart einer Brennkraftmaschine, insbesondere eines Dieselmotors durch die Flammglühkerze einer Flammstartanlage zunächst 20 bis 30 Sekunden lang vorgeglüht. Nach der Vorglühzeit wird durch Betätigung des Starters und des Anlassers der Brennkraftmaschine die Kraftstoffversorgung der Flammglühkerze aufgenommen und wird durch die im Luftansaugkanal angesaugte Luft und den durch die Flammglühkerze vorbereiteten Kraftstoff eine Flamme gezündet. An die Anlaßbetriebsphase schließt sich eine Nachflammphase an.As shown in Fig. 3, one at cold start Internal combustion engine, especially a diesel engine through the Flame glow plug of a flame start system initially 20 to 30 seconds long preheated. After the preheating time is activated the starter and the starter of the internal combustion engine the fuel supply the flame glow plug is picked up by the air sucked in the air intake duct and that through the flame glow plug prepared fuel ignited a flame. To the The start-up phase is followed by an after-flame phase.

    Damit die Flamme an der Flammglühkerze insbesondere in der Anlaßphase und bei niedriger Drehzahl der Brennkraftmaschine nicht zuviel Sauerstoff verbrennt, wird die Höhe der Kraftstoffversorgung der Flammglühkerze in Abhängigkeit von der jeweiligen Betriebsphase der Brennkraftmaschine entsprechend dosiert. Das heißt insbesondere, daß der Kraftstoffdurchfluß an der Flammglühkerze in der Anlaßphase und bei niedriger Drehzahl abgesenkt wird, um dadurch den Sauerstoffverbrauch herabzusetzen.So that the flame on the flame glow plug especially in the Starting phase and at low engine speed Do not burn too much oxygen, the amount of fuel supply the flame glow plug depending on the particular Operating phase of the internal combustion engine dosed accordingly. The means in particular that the fuel flow at the flame glow plug lowered in the starting phase and at low engine speed to reduce oxygen consumption.

    Um das zu erreichen ist die in Fig. 1 und Fig. 2 dargestellte Flammstartanlage, die eine Flammglühkerze 1 aufweist, die über eine Kraftstoffleitung 5 mit Kraftstoff versorgt wird, mit einem Ventil zum Steuern der Kraftstoffmenge, nämlich einem Magnetventil 2 versehen, das in der Kraftstoffleitung 5 zur Versorgung der Flammglühkerze angeordnet ist. Über einen Steuerteil 3 wird das Magnetventil 2 so gesteuert, daß die Kraftstoffversorgung für die Flammglühkerze insbesondere in der Anlaßphase und bei niedriger Drehzahl der Brennkraftmaschine gedrosselt wird, so daß die an der Flammglühkerze auftretende Flamme nicht zuviel Sauerstoff verbraucht.To achieve this, the one shown in FIGS. 1 and 2 is shown Flame start system, which has a flame glow plug 1, which is supplied with fuel via a fuel line 5, with a valve for controlling the amount of fuel, namely one Solenoid valve 2 provided in the fuel line 5 for Supply of the flame glow plug is arranged. Via a control section 3, the solenoid valve 2 is controlled so that the fuel supply for the flame glow plug especially in the starting phase and throttled at low engine speed is so that the flame occurring at the flame glow plug does not consumed too much oxygen.

    Bei dem in Fig. 1 und Fig. 2 dargestellten Ausführungsbeispiel liegen am Magnetventil 2 Taktsignale, die vom Steuerteil 3 in Abhängigkeit von den jeweiligen Betriebsphasen erzeugt werden. Der Steuerteil 3 kann insbesondere Taktsignale mit variierender Taktfrequenz fx und/oder Taktlänge tx, d.h. Öffnungszeit des Magnetventils 2 liefern.In the embodiment shown in FIGS. 1 and 2 are 2 clock signals on the solenoid valve, from the control part 3 generated depending on the respective operating phases become. The control part 3 can in particular clock signals with varying Clock frequency fx and / or clock length tx, i.e. opening time of the solenoid valve 2 deliver.

    Wie es in Fig. 4 dargestellt ist, liegen vom Steuerteil 3 in der Anlaßphase Taktsignale mit relativ niedriger Taktfrequenz fx am Magnetventil 2, so daß die Höhe der Kraftstoffversorgung der Flammglühkerze 1 entsprechend reduziert ist. In einem sich daran anschließenden Bereich nach dem Anlassen der Brennkraftmaschine nimmt die Taktfrequenz fx des Taktsignals vom Steuerteil 3 und damit die Höhe der Kraftstoffversorgung der Flammglühkerze 1 zu. Über diese verschiedenen Drehzahlbereiche können je nach Steuerteil verschiedene Taktfrequenzen gefahren werden, um die Höhe der Kraftstoffversorgung der Flammglühkerze 1 entsprechend zu steuern oder zu dosieren. Wenn nach etwa 40 Sekunden die Brennkraftmaschine mit einer höheren Drehzahl läuft, kann über eine Erfassung der jeweiligen Drehzahl der Brennkraftmaschine das Takten des Magnetventils 2 beendet werden, so daß das Magnetventil 2 konstant geöffnet ist.As shown in FIG. 4, the control part 3 lies in the starting phase clock signals with a relatively low clock frequency fx on solenoid valve 2 so that the amount of fuel supply the flame glow plug 1 is reduced accordingly. In one yourself adjoining area after starting the internal combustion engine takes the clock frequency fx of the clock signal from the control part 3 and thus the amount of fuel supply to the flame glow plug 1 to. Depending on these different speed ranges Different clock frequencies can be driven around the control section Height of the fuel supply to the flame glow plug 1 accordingly to control or to dose. If after about 40 seconds Internal combustion engine running at a higher speed can over a detection of the respective speed of the internal combustion engine the clocking of the solenoid valve 2 can be stopped, so that the solenoid valve 2 is constantly open.

    Wie es im einzelnen in Fig. 2 dargestellt ist, wirkt ein Schlauch, der den Teil der Kraftstoffversorgungsleitung 5 zwischen dem Magnetventil 2 und der Flammglühkerze 1 bildet, als Puffer, es kann jedoch zusätzlich auch noch ein Kraftstoffspeicher 4 in der Kraftstoffversorgungsleitung 5 zwischen der Flammglühkerze 1 und dem Magnetventil 2 angeordnet sein. Weiterhin können Drosselblenden 6, 7 vor und/oder hinter dem Magnetventil 2 und/oder vor der Flammglühkerze vorgesehen sein. Der Puffer, der Kraftstoffspeicher und die Drosselblenden sorgen für einen vergleichmäßigten Kraftstoffdurchlauf und Kraftstoffabbau und verringern dadurch das Pulsieren der Flamme an der Flammglühkerze 1. Die Drosselblenden 6 und 7 haben dabei ähnlich wie ein Verzögerungsglied die Funktion, den Druck zu drosseln.As shown in detail in Fig. 2, acts Hose that the part of the fuel supply line 5 between the solenoid valve 2 and the flame glow plug 1 forms as Buffer, but it can also be a fuel storage 4 in the fuel supply line 5 between the flame glow plug 1 and the solenoid valve 2 may be arranged. Farther can choke 6, 7 in front of and / or behind the solenoid valve 2 and / or be provided in front of the flame glow plug. The buffer, the fuel accumulator and the throttle plates ensure you uniform fuel flow and fuel degradation and this reduces the pulsation of the flame on the flame glow plug 1. The throttle orifices 6 and 7 have similar to one Delay function to throttle the pressure.

    Mittels einer Flammstartanlage mit dem oben beschriebenen Aufbau kann über den gesamten Drehzahlbereich der Brennkraftmaschine und bei verschiedenen Druckzuständen in der Kraftstoffzufuhr der Flammglühkerze deren Brennverhalten so stabilisiert und optimiert werden, daß sich verbesserte Kaltstarteigenschaften der Brennkraftmaschine ergeben und die Emissionen im Warmlaufbetrieb sowie im Leerlauf- und Schubbetrieb vermindert sind.Using a flame start system with the one described above Construction can take place over the entire speed range of the internal combustion engine and with different pressure conditions in the fuel supply the flame glow plug stabilizes their burning behavior and optimized that improved cold start properties the internal combustion engine and the emissions in warm-up mode as well as in idle and overrun conditions are reduced.

    Claims (8)

    1. A method of operating a flame starting system for an internal combustion engine, especially a diesel engine, having a flame glow plug which is arranged in the air intake channel of the internal combustion engine and is supplied with fuel, in which method the flame glow plug is operated with a reduced heating capacity in a specific operating phase of the internal combustion engine, characterised in that the specific operating phase is the starting operating phase up to the attainment of a specific speed of the internal combustion engine and, in that operating phase, the flame glow plug is supplied in a proportioned manner with a reduced quantity of fuel, and then the flame glow plug is supplied with the full quantity of fuel.
    2. A method according to claim 1, characterised in that the fuel supply of the flame glow plug in the starting operating phase is effected in a timed manner with timing pulse frequencies and/or timing pulse lengths chosen in dependence upon the speed attained.
    3. A method according to claim 2, characterised in that the timing pulse frequency and/or the timing pulse length is kept constant over specific speed ranges.
    4. A flame starting system for an internal combustion engine, especially a diesel engine, having a flame glow plug which is arranged in the air intake channel of the internal combustion engine and is supplied with fuel via a fuel line, in which a valve for controlling the quantity of fuel is arranged to which control signals from a control unit are applied, characterised in that the control unit is configured in such a manner that, in the starting operating phase up to the attainment of a specific speed of the internal combustion engine, the flame glow plug is supplied with a reduced quantity of fuel and then the valve is completely opened.
    5. A flame starting system according to claim 4, characterised in that the valve for controlling the quantity of fuel is a timed solenoid valve to which timing signals from the control unit are applied, the frequency and/or length of which timing signals depend upon the speed of the internal combustion engine attained at the time.
    6. A flame starting system according to claim 5, characterised by a buffer device which lies in the fuel line between the solenoid valve and the flame glow plug.
    7. A flame starting system according to claim 6, characterised in that the buffer device is a fuel reservoir.
    8. A flame starting system according to any one of claims 4 to 7, characterised by throttle restrictors which are arranged in the fuel line upstream and/or downstream of the valve for controlling the quantity of fuel and/or the flame glow plug.
    EP97109978A 1996-06-24 1997-06-18 Method of operating a flame starting system for internal combustion engine and flame starting system for internal combustion engine Expired - Lifetime EP0816673B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19629928 1996-06-24
    DE19629928A DE19629928A1 (en) 1996-07-24 1996-07-24 Method for operating a flame start system for an internal combustion engine and flame start system for an internal combustion engine

    Publications (2)

    Publication Number Publication Date
    EP0816673A1 EP0816673A1 (en) 1998-01-07
    EP0816673B1 true EP0816673B1 (en) 2002-04-17

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    EP97109978A Expired - Lifetime EP0816673B1 (en) 1996-06-24 1997-06-18 Method of operating a flame starting system for internal combustion engine and flame starting system for internal combustion engine

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    US (1) US5937814A (en)
    EP (1) EP0816673B1 (en)
    AT (1) ATE216464T1 (en)
    DE (2) DE19629928A1 (en)
    ES (1) ES2174149T3 (en)

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    AT391352B (en) * 1986-01-23 1990-09-25 Steyr Daimler Puch Ag AIR COMPRESSING, SELF-IGNITION INJECTION INTERNAL COMBUSTION ENGINE WITH A FLAME STARTING DEVICE
    DE3602136A1 (en) * 1986-01-24 1987-07-30 Kloeckner Humboldt Deutz Ag Flame glow plug
    DE4010093C1 (en) * 1990-03-29 1991-08-14 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Flame plug for IC-engine - has fuel metering insert and spaced evaporator tube to enclose heating bar
    DE4032758A1 (en) * 1990-10-16 1992-04-30 Daimler Benz Ag Intake air heater for IC engine flame starting - supplies metered fuel vol., controlled by detected engine operating parameters
    DE4041631C1 (en) * 1990-12-22 1992-02-06 Daimler Benz Ag
    DE4041630A1 (en) * 1990-12-22 1992-07-02 Daimler Benz Ag METHOD FOR HEATING THE SUCTION AIR IN INTERNAL COMBUSTION ENGINES BY MEANS OF A FLAME STARTING SYSTEM
    DE4243959A1 (en) * 1992-12-23 1994-06-30 Beru Werk Ruprecht Gmbh Co A Flame start system for a combustion device
    DE4243965A1 (en) * 1992-12-23 1994-06-30 Beru Werk Ruprecht Gmbh Co A Flame annealing plant
    DE29501494U1 (en) * 1995-01-31 1995-03-23 Beru Ruprecht Gmbh & Co Kg, 71636 Ludwigsburg Flame start system

    Also Published As

    Publication number Publication date
    DE59707014D1 (en) 2002-05-23
    US5937814A (en) 1999-08-17
    DE19629928A1 (en) 1998-01-29
    EP0816673A1 (en) 1998-01-07
    ES2174149T3 (en) 2002-11-01
    ATE216464T1 (en) 2002-05-15

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