EP1273795A2 - Method and apparatus for injecting fuel - Google Patents

Method and apparatus for injecting fuel Download PDF

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Publication number
EP1273795A2
EP1273795A2 EP02008887A EP02008887A EP1273795A2 EP 1273795 A2 EP1273795 A2 EP 1273795A2 EP 02008887 A EP02008887 A EP 02008887A EP 02008887 A EP02008887 A EP 02008887A EP 1273795 A2 EP1273795 A2 EP 1273795A2
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EP
European Patent Office
Prior art keywords
injection
pump piston
pump
early
eccentric
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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.)
Granted
Application number
EP02008887A
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German (de)
French (fr)
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EP1273795B1 (en
EP1273795A3 (en
Inventor
Udo Schlemmer-Kelling
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Caterpillar Motoren GmbH and Co KG
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Caterpillar Motoren GmbH and Co KG
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Publication of EP1273795A3 publication Critical patent/EP1273795A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/16—Adjustment of injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/16—Adjustment of injection timing
    • F02D1/162—Adjustment of injection timing by mechanical means dependent on engine speed for angular adjustment of driving and driven shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders

Definitions

  • the invention relates to a method and an apparatus for injecting fuel into a combustion chamber a diesel engine through an injector that connected to an injection pump by means of a pressure line which is an adjustable pump piston with a Control edge has.
  • the object of the invention is a method and an apparatus for injecting fuel into a combustion chamber to create a diesel engine with the harmful Exhaust emissions in a simple manner at predetermined Load conditions of the engine can be reduced.
  • the injection timing can be achieved in the "early" direction is, that is, when the start of delivery and the time of injection accordingly before an TDC position is made so-called soot formation at partial and light loads avoided.
  • This is done when the pump piston is adjusted in the injection pump at partial load and low load achieved high injection pressure at the injector, which in a range of about minus 20 ° to minus 10 ° of the piston angle before TDC of the engine piston and in an area of the Pump piston speed of about 2.5 to 3.5 m / s lies.
  • the early start of delivery and injection timing will achieved by using the pump piston of the injection pump its control edge via a control rod in a conveying position is rotatable in the direction of "early” and this Twisting movement "early” is an axial adjusting movement for Corresponding start of injection via a Pump piston functionally connected control device, such as a Eccentric device is superimposed. Combined by this continuous adjustment of the pump piston optimal early injection take place, which also at high piston speed is achieved, resulting in a relatively high injection pressure is guaranteed.
  • the axial displacement of the pump piston is dependent of the piston position of the engine and this points the eccentric device is held on an eccentric Rocker arm on, with its free end by means of a roller between the pump piston and a camshaft is arranged and via the eccentric to the camshaft adjustable in an injection position in the "early" direction is.
  • This eccentric setting allows it to be easier Way by adjusting the eccentric a start of funding Direction "early” or “late”, that is, the Roller can be adjusted to cam the camshaft accordingly be so that according to the invention at partial load or Low load the adjustment in the "early” direction can be selected and then again at full load, for example an adjustment towards "late” or in another way can be made.
  • an internal combustion engine 1 for example a diesel engine, takes place by means of a fuel-pump unit 2, via a pressure line 3 with an injection nozzle 4 is connected.
  • the injection pump 2 has an adjustable pump piston 5 with a control edge 6 and a longitudinal groove 7.
  • An adjustment of the pump piston 5 to regulate the Flow is by means of a control rod 15 or same means.
  • the end of funding is determined by the position the control edge 6 after a rotation of the piston 5 determined who trained according to the objective is.
  • the feed wells are also decisive for the production 8, which are essential for the Delivery stroke and the delivery rate.
  • the axial rise of the pump piston 5 takes place via a on a rocker arm 9 arranged roller 10, which is in operative connection stands with a cam II of a camshaft 12.
  • the adjustable according to the setting "early” or “late” is. This changes the position of the roller 10 for cam II and the injection timing can be changed, that is, the injection timing can be according to the Load state of the engine can be changed, which in interaction with the promotion of fuel over the position the control edge in the injection pump 2.
  • the "early" injection timing E1 before the "late” injection timing E in a range from minus 20 ° to minus 10 ° of the crank angle K provided before TDC and the injection takes place at a speed V of the pump piston 5 in a range from 2.5 to 3.5 M / S.
  • the injection timing is advanced by 14 ° crank angle K. and this at an increased piston speed V of 3 m / s of the injection pump 2.
  • the injection timing is brought forward at shown version by approx. 14 ° crank angle from E to E2, the start of fuel delivery in particular achieved the adjustment of the eccentric 12 on the pivot lever 9 and the shift in fuel delivery by approx 1.8 m / s to 3.5 m / s by turning the Pump piston 5 according to E1. Enable both measures a relocation of the start of delivery and the injection point towards "early”.

Abstract

During partial/low load combined adjustment of a pump piston (5) in an injection pump (2) generates high injection pressure at an injection nozzle (4) set in a crank angle range of -20 degrees to -10 degrees before the top dead center of an engine's piston and in a speed range for the pump piston between 2.5 and 3.5 m/s. With its control edge (6) the pump piston can be twisted 'early' in a feed direction by means of a control rod (15). An Independent claim is also included for a device for carrying out the method of the present invention.

Description

Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum Einspritzen von Kraftstoff in einen Verbrennungsraum eines Dieselmotors über eine Einspritzdüse, die mittels einer Druckleitung mit einer Einspritzpumpe verbunden ist, welche einen verstellbaren Pumpenkolben mit einer Steuerkante aufweist.The invention relates to a method and an apparatus for injecting fuel into a combustion chamber a diesel engine through an injector that connected to an injection pump by means of a pressure line which is an adjustable pump piston with a Control edge has.

Es hat sich durch verschärfte Anforderungen an Verbrauch und Abgasemission gezeigt, daß ein unveränderlicher Förderbeginn des Kraftstoffs nicht mehr zu vertreten ist. Im Zusammenhang mit gesetzlichen Emissionsbeschränkungen ist es erforderlich, durch Verlegung des Zündzeitpunktes den NOx-Ausstoß zu beeinflussen. Dies kann beispielsweise durch die Verwendung einer besonderen obenliegenden Steuerkante am Pumpenkolben, mit der eine regelweg- und damit lastabhängige Förderbeginnverstellung erreichbar ist. Die Geometrie von aufeinander abgestimmter Steuerkante und Steuerbohrung erlaubt keine beliebige Förderbeginnänderung über den Regelweg. Diese Förderbeginnänderung wird auch erzielt, wenn eine motorseitige Lagerstelle eines Schwinghebels im Antrieb der Einspritzpumpe als Exzenter ausgebildet ist, so daß durch ein Verstellen des Exzenters eine Förderbeginnänderung in Richtung "früh" oder "spät" vorgenommen werden kann (Handbuch Dieselmotor, Klaus Mollenhauer, Springer-Verlag 1997, S. 207).It has been tightened due to consumption requirements and exhaust emissions showed that a constant start of production of the fuel is no longer responsible. in the Is related to legal emission restrictions it is necessary to change the ignition timing To influence NOx emissions. This can be done, for example, by the use of a special overhead control edge on the pump piston, with which a control path and thus load-dependent Funding start adjustment is achievable. The geometry of coordinated control edge and control bore does not allow any change to start of funding the control path. This change in funding start will also be achieved if an engine-side bearing of a rocker arm in Drive of the injection pump is designed as an eccentric, so that by changing the eccentric a change in funding start towards "early" or "late" can (manual diesel engine, Klaus Mollenhauer, Springer-Verlag 1997, p. 207).

Aufgabe der Erfindung ist es, ein Verfahren und eine Vorrichtung zum Einspritzen von Kraftstoff in einen Verbrennungsraum eines Dieselmotors zu schaffen, mit dem schädliche Abgasemissionen in einfacher Weise bei vorbestimmten Lastzuständen des Motors herabsetzbar sind.The object of the invention is a method and an apparatus for injecting fuel into a combustion chamber to create a diesel engine with the harmful Exhaust emissions in a simple manner at predetermined Load conditions of the engine can be reduced.

Diese Aufgabe wird erfindungsgemäß durch die Verfahrensmerkmale der Ansprüche 1 und 2 gelöst, wobei die Durchführung des Verfahrens weiterbildende Vorrichtungsmerkmale in den Ansprüchen 3 bis 6 dargestellt sind.This object is achieved by the method features of claims 1 and 2 solved, the implementation Device features further developing the method are presented in claims 3 to 6.

Damit der Einspritzzeitpunkt in Richtung "früh" erzielbar ist, das heißt, wenn der Förderbeginn sowie der Einspritzzeitpunkt entsprechend vor einer OT-Stellung erfolgt, wird eine sogenannte Rußbildung bei Teil- und Schwachlast vermieden. Hierzu wird bei einer Verstellung des Pumpenkolbens in der Einspritzpumpe bei Teillast- und Schwachlast ein hoher Einspritzdruck an der Einspritzdüse erzielt, der in einem Bereich von etwa minus 20° bis minus 10° des Kolbenwinkels vor OT des Motorkolbens und in einem Bereich der Geschwindigkeit des Pumpenkolbens von etwa 2,5 bis 3,5 m/s liegt. Der hohe Einspritzdruck bei einem Kurbelwinkel von etwa minus 14° vor OT des Motorkolbens und bei einer Geschwindigkeit von etwa 3 m/s des Pumpenkolbens liegt. Durch diese Maßnahme wird sowohl der Einspritzzeitpunkt vorverlegt, als auch der Förderbeginn des Kraftstoffs.So that the injection timing can be achieved in the "early" direction is, that is, when the start of delivery and the time of injection accordingly before an TDC position is made so-called soot formation at partial and light loads avoided. This is done when the pump piston is adjusted in the injection pump at partial load and low load achieved high injection pressure at the injector, which in a range of about minus 20 ° to minus 10 ° of the piston angle before TDC of the engine piston and in an area of the Pump piston speed of about 2.5 to 3.5 m / s lies. The high injection pressure at a crank angle of about minus 14 ° before TDC of the engine piston and at one Speed of about 3 m / s of the pump piston. Through this measure, both the injection timing brought forward, as well as the start of fuel delivery.

Der frühe Förderbeginn und Einspritzzeitpunkt wird erreicht, indem der Pumpenkolben der Einspritzpumpe mit seiner Steuerkante über eine Regelstange in eine Förderstellung in Richtung "früh" verdrehbar ist und dieser Verdrehbewegung "früh" eine axiale Stellbewegung zum korrespondierenden Einspritzbeginn über eine mit dem Pumpenkolben wirkverbundenen Steuereinrichtung, wie eine Exzentereinrichtung, überlagert ist. Durch diese kombinierte kontinuierliche Verstellung des Pumpenkolbens kann eine optimale frühe Einspritzung erfolgen, die zudem bei hoher Kolbengeschwindigkeit erzielt wird, wodurch ein relativ hoher Einspritzdruck gewährleistet ist.The early start of delivery and injection timing will achieved by using the pump piston of the injection pump its control edge via a control rod in a conveying position is rotatable in the direction of "early" and this Twisting movement "early" is an axial adjusting movement for Corresponding start of injection via a Pump piston functionally connected control device, such as a Eccentric device is superimposed. Combined by this continuous adjustment of the pump piston optimal early injection take place, which also at high piston speed is achieved, resulting in a relatively high injection pressure is guaranteed.

Insbesondere wird durch diese kombinierte und aufeinander abgestellte Verstellung des Pumpenkolbens die Frühförderstellung des Kraftstoffs bei einem Kurbelwinkel von etwa minus 40° vor OT bis zu einem Kurbelwinkel von etwa minus 14° vor OT erzielt, und bei etwa minus 14° vor OT ist eine Kraftstoffeinspritzung in Richtung "früh" über die Exzentereinrichtung steuerbar.In particular, this is combined and one on the other stopped adjustment of the pump piston the early delivery position of the fuel at a crank angle of about minus 40 ° before TDC up to a crank angle of approximately minus 14 ° before TDC, and at about minus 14 ° before TDC there is one Fuel injection in the "early" direction via the eccentric device controllable.

Die axiale Verstellung des Pumpenkolbens erfolgt in Abhängigkeit von der Kolbenstellung des Motors und hierzu weist die Exzentereinrichtung einen auf einem Exzenter gehaltenen Schwinghebel auf, der mit seinem freien Ende mittels einer Rolle zwischen dem Pumpenkolben und einer Nockenwelle angeordnet ist und über den Exzenter zur Nockenwelle in eine Einspritzstellung in Richtung "früh" einstellbar ist. The axial displacement of the pump piston is dependent of the piston position of the engine and this points the eccentric device is held on an eccentric Rocker arm on, with its free end by means of a roller between the pump piston and a camshaft is arranged and via the eccentric to the camshaft adjustable in an injection position in the "early" direction is.

Diese Exzentereinstellung ermöglicht es, in einfacher Weise durch Verstellen des Exzenters eine Förderbeginn in Richtung "früh" oder "spät" vorzunehmen, das heißt, die Rolle kann zum Nocken der Nockenwelle entsprechend eingestellt werden, so daß erfindungsgemäß bei Teillast bzw. Schwachlast die Verstellung in Richtung "früh" wählbar ist und danach beispielsweise bei Volllast nachfolgend wieder eine Verstellung in Richtung "spät" oder in anderer Weise vorgenommen werden kann.This eccentric setting allows it to be easier Way by adjusting the eccentric a start of funding Direction "early" or "late", that is, the Roller can be adjusted to cam the camshaft accordingly be so that according to the invention at partial load or Low load the adjustment in the "early" direction can be selected and then again at full load, for example an adjustment towards "late" or in another way can be made.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben.
Es zeigen:

Fig. 1
ein Diagramm mit einem über die Geschwindigkeit des Pumpenkolbens zum Kurbelwinkel aufgetragenen Kurvenverlauf mit Förderbeginn und "frühen und/späten" Einspritzzeit,
Fig. 2
eine schematische Darstellung der Vorrichtung zur Durchführung des Verfahrens mit Einspritzpumpe und axialer Verstellung und Drehverstellung des Pumpenkolbens.
An embodiment of the invention is shown in the drawings and will be described in more detail below.
Show it:
Fig. 1
1 shows a diagram with a curve profile plotted against the speed of the pump piston to the crank angle with the start of delivery and "early and / or late" injection time,
Fig. 2
is a schematic representation of the device for performing the method with injection pump and axial adjustment and rotary adjustment of the pump piston.

Ein Einspritzen des Kraftstoffs in einen Verbrennungsraum einer Brennkraftmaschine 1 beispielsweise eines Dieselmotors, erfolgt mittels einer kraftstofffördernden Pumpeneinheit 2, die über eine Druckleitung 3 mit einer Einspritzdüse 4 verbunden ist. Die Einspritzpumpe 2 weist einen verstellbaren Pumpenkolben 5 mit einer Steuerkante 6 sowie einer Längsnut 7 auf.Injecting the fuel into a combustion chamber an internal combustion engine 1, for example a diesel engine, takes place by means of a fuel-pump unit 2, via a pressure line 3 with an injection nozzle 4 is connected. The injection pump 2 has an adjustable pump piston 5 with a control edge 6 and a longitudinal groove 7.

Eine Verstellung des Pumpenkolbens 5 zur Regelung der Fördermenge erfolgt mittels einer Regelstange 15 oder der gleichen Mittel. Das Förderende wird durch die Stellung der Steuerkante 6 nach einer Verdrehung des Kolbens 5 bestimmt, die entsprechend der Zielsetzung ausgebildet ist. Bestimmend für die Förderung sind auch die Zulaufbohrungen 8, die wesentlich mitbestimmend sind für den Förderhub und die Fördermenge.An adjustment of the pump piston 5 to regulate the Flow is by means of a control rod 15 or same means. The end of funding is determined by the position the control edge 6 after a rotation of the piston 5 determined who trained according to the objective is. The feed wells are also decisive for the production 8, which are essential for the Delivery stroke and the delivery rate.

Die axiale Anhebung des Pumpenkolbens 5 erfolgt über eine an einem Schwinghebel 9 angeordnete Rolle 10, die in Wirkverbindung mit einem Nocken II einer Nockenwelle 12 steht. Zur Veränderung der Stellung der Rolle 10 zum Nocken II ist der Schwinghebel 9 auf einem Exzenter 12 gelagert, der entsprechend der Einstellung "früh" oder "spät" verstellbar ist. Hierdurch ändert sich die Position der Rolle 10 zum Nocken II und der Einspritzzeitpunkt ist veränderbar, das heißt, es kann der Einspritzzeitpunkt entsprechend dem Lastzustand des Motors verändert werden, was im Zusammenspiel mit der Förderung des Kraftstoffs über die Stellung der Steuerkante in der Einspritzpumpe 2 erfolgt.The axial rise of the pump piston 5 takes place via a on a rocker arm 9 arranged roller 10, which is in operative connection stands with a cam II of a camshaft 12. To change the position of the roller 10 to the cam II the rocker arm 9 is mounted on an eccentric 12, the adjustable according to the setting "early" or "late" is. This changes the position of the roller 10 for cam II and the injection timing can be changed, that is, the injection timing can be according to the Load state of the engine can be changed, which in interaction with the promotion of fuel over the position the control edge in the injection pump 2.

Wie in Fig. 2 anhand des Diagramms näher dargestellt, ist der "frühe" Einspritzzeitpunkt E1 vor dem "späten" Einspritzzeitpunkt E in einem Bereich von minus 20° bis minus 10° des Kurbelwinkels K vor dem OT vorgesehen und die Einspritzung erfolgt bei einer Geschwindigkeit V des Pumpenkolbens 5 in einem Bereich von 2,5 bis 3,5 M/S. Insbesondere ist der Einspritzzeitpunkt um 14° Kurbelwinkel K vorverlegt und dies bei einer erhöhten Kolbengeschwindigkeit V von 3 m/s der Einspritzpumpe 2.As shown in more detail in FIG. 2 using the diagram the "early" injection timing E1 before the "late" injection timing E in a range from minus 20 ° to minus 10 ° of the crank angle K provided before TDC and the injection takes place at a speed V of the pump piston 5 in a range from 2.5 to 3.5 M / S. In particular the injection timing is advanced by 14 ° crank angle K. and this at an increased piston speed V of 3 m / s of the injection pump 2.

Die Vorverlegung des Einspritzzeitpunktes erfolgt bei der gezeigten Ausführung um ca. 14° Kurbelwinkel von E zu E2, wobei der Förderbeginn des Kraftstoffs insbesondere durch die Verstellung des Exzenters 12 am Schwenkhebel 9 erzielt wird und die Verlagerung der Kraftstofförderung von ca. 1,8 m/s auf 3,5 m/s durch entsprechende Verdrehung des Pumpenkolbens 5 nach E1 erfolgt. Beide Maßnahmen ermöglichen eine Verlegung des Förderbeginns und des Einspritzpunktes in Richtung "früh".The injection timing is brought forward at shown version by approx. 14 ° crank angle from E to E2, the start of fuel delivery in particular achieved the adjustment of the eccentric 12 on the pivot lever 9 and the shift in fuel delivery by approx 1.8 m / s to 3.5 m / s by turning the Pump piston 5 according to E1. Enable both measures a relocation of the start of delivery and the injection point towards "early".

Ausgehend von einer Basisauslegung wird somit eine doppelte (gegenläufige) Förderbeginn-Verstellung durchgeführt. Bei Teillast wird über die Lenkerwelle der Förderbeginn weit nach früh verschoben, von E auf E2. Um in Bereiche höherer Plungergeschwindigkeit zu gelangen, wird über die Pumpe wieder eine Rückstellung nach spät durchgeführt. Dadurch kommt eine Einstellung von E2 zu E1 zustande.Starting from a basic design, it becomes a double one (Opposing) funding start adjustment carried out. At partial load, delivery begins via the handlebar shaft shifted far ahead, from E to E2. To in To reach areas of higher plunger speed The pump is reset late. This brings E2 to E1 conditions.

Hierdurch wird eine wesentlich höhere Einspritzintensität zu einem frühen Zeitpunkt zur Rußsenkung erzielt. Die Verbrennung bei Teillast wird intensiviert, um die Ruß-Emission zu reduzieren.This results in a significantly higher injection intensity achieved at an early stage to reduce soot. The Partial load combustion is intensified to reduce soot emissions to reduce.

Neben dem Nockenprofil über einen exzentrischen Lenker ist eine Verdrehung der Nockenwelle im Antriebszahnrad möglich. Die Verstellung des Förderbeginns erfolgt über die Förderbeginnkante die Plungers der Pumpe.Next to the cam profile is an eccentric handlebar a rotation of the camshaft in the drive gear possible. The start of funding is adjusted via the pump start edge the plungers of the pump.

Claims (6)

Verfahren zum Einspritzen von Kraftstoff in einen Verbrennungsraum eines Dieselmotors, über eine Einspritzdüse, die mittels einer Druckleitung mit einer Einspritzpumpe verbunden ist, welche einen verstellbaren Pumpenkolben mit einer Steuerkante und Steuerbohrungen aufweist, dadurch gekennzeichnet, daß über eine kombinierte Verstellung des Pumpenkolbens (5) in der Einspritzpumpe (2) bei Teil- und Schwachlast ein hoher Einspritzdruck an der Einspritzdüse (4) erzeugt wird, der in einem Bereich von etwa minus 20° bis minus 10° des Kurbelwinkels (K) vor OT des Motorkolbens und in einem Bereich der Geschwindigkeit (V) des Pumpenkolbens (5) von etwa 2,5 bis 3,5 m/s liegt, wobei der Pumpenkolben (5) der Einspritzpumpe (2) mit seiner Steuerkante (6) über eine Regelstange (15) in eine Förderrichtung "früh" verdrehbar ist und dieser Verdrehbewegung in Richtung "früh" eine axiale Stellbewegung zum korrespondierenden Einspritzbeginn über eine mit dem Pumpenkolben (5) wirkverbundene Steuereinrichtung, wie eine Exzentereinrichtung (12), überlagert ist.Method for injecting fuel into a combustion chamber of a diesel engine, via an injection nozzle, which is connected by means of a pressure line to an injection pump, which has an adjustable pump piston with a control edge and control bores, characterized in that a combined adjustment of the pump piston (5) in the injection pump (2) at partial and low load, a high injection pressure is generated at the injection nozzle (4), which is in a range from approximately minus 20 ° to minus 10 ° of the crank angle (K) before TDC of the engine piston and in a range of speed (V) of the pump piston (5) is from approximately 2.5 to 3.5 m / s, the pump piston (5) of the injection pump (2) with its control edge (6) via a control rod (15) in a delivery direction "early.""is rotatable and this twisting movement in the" early "direction is an axial adjusting movement for the corresponding start of injection via a control operatively connected to the pump piston (5) ereinrichtung, such as an eccentric (12), is superimposed. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der hohe Einspritzdruck bei einem Kurbelwinkel (K) von etwa minus 14° vor OT des Motorkolbens und bei einer Geschwindigkeit (V) von etwa 3 m/s des Pumpenkolbens (5) liegt.Method according to claim 1, characterized in that the high injection pressure is at a crank angle (K) of approximately minus 14 ° before TDC of the engine piston and at a speed (V) of approximately 3 m / s of the pump piston (5). Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß die Förderstellung in Richtung "früh" des Kraftstoffs bei einem Kurbelwinkel (K) von etwa minus 40° vor OT bis zu ein Kurbelwinkel (K) von etwa minus 14° vor OT verläuft und bei etwa minus 14° vor OT eine Kraftstoffeinspritzung in Richtung "früh" über die Exzentereinrichtung (12) steuerbar ist.Device for carrying out the method according to claims 1 or 2, characterized in that the delivery position in the "early" direction of the fuel at a crank angle (K) of approximately minus 40 ° before TDC to a crank angle (K) of approximately minus 14 ° runs before TDC and at approximately minus 14 ° before TDC a fuel injection in the "early" direction can be controlled via the eccentric device (12). Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß die Exzentereinrichtung (12) aus einem auf einem Exzenter gehaltenen Schwinghebel (9) besteht, der mit seinem freien Ende mittels einer Rolle (10) zwischen dem Pumpenkolben (5) und einer Nockenwelle (16) angeordnet und über den Exzenter (12) zur Nockenwelle (16) in eine Einspritzstellung in Richtung "früh" einstellbar ist. Device for carrying out the method according to claims 1 or 2, characterized in that the eccentric device (12) consists of a rocker arm (9) held on an eccentric, the free end of which, by means of a roller (10), between the pump piston (5) and a camshaft (16) is arranged and can be set via the eccentric (12) to the camshaft (16) in an injection position in the "early" direction. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Exzenter (12) zur Verstellung der Rolle (10) des Schwinghebels (9) zur Nockenwelle (16) in Abhängigkeit von einer Teil- und Schwachlast des Motors einstellbar ist.Device according to one of claims 1 to 4, characterized in that the eccentric (12) for adjusting the roller (10) of the rocker arm (9) to the camshaft (16) is adjustable depending on a partial and low load of the engine. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß eine direkte Verdrehung der Nockenwelle über ein Antriebszahnrad einstellbar ist.Device according to one of claims 1 to 5, characterized in that a direct rotation of the camshaft is adjustable via a drive gear.
EP02008887A 2001-07-04 2002-04-20 Method and apparatus for injecting fuel Expired - Lifetime EP1273795B1 (en)

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DE10132363 2001-07-04
DE10132363 2001-07-04

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2136054A1 (en) 2008-06-18 2009-12-23 Caterpillar Motoren GmbH & Co. KG Method and device for controlling the operation of an internal combustion engine
EP2634389A1 (en) 2012-02-28 2013-09-04 Caterpillar Motoren GmbH & Co. KG Self ignition operation of alternative fuel internal combustion engines
EP2677142A1 (en) 2012-06-22 2013-12-25 Caterpillar Motoren GmbH & Co. KG Method and device for controlling the operation of dual-fuel engine
EP2752561A1 (en) 2013-01-07 2014-07-09 Caterpillar Motoren GmbH & Co. KG Method and device for controlling the operation of an internal combustion engine
EP2752571A1 (en) 2013-01-07 2014-07-09 Caterpillar Motoren GmbH & Co. KG Method and device for controlling the operation of a dual fuel engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT311727B (en) * 1971-11-04 1973-11-26 List Hans Injection pump for diesel engines
GB2014656A (en) * 1978-02-20 1979-08-30 List H Improvements in or relating to Internal Combustion Engines Having Fuel Injection
DE19721841A1 (en) * 1997-05-24 1998-09-03 Mtu Friedrichshafen Gmbh Fuel injection system for air compressing, self-igniting combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT311727B (en) * 1971-11-04 1973-11-26 List Hans Injection pump for diesel engines
GB2014656A (en) * 1978-02-20 1979-08-30 List H Improvements in or relating to Internal Combustion Engines Having Fuel Injection
DE19721841A1 (en) * 1997-05-24 1998-09-03 Mtu Friedrichshafen Gmbh Fuel injection system for air compressing, self-igniting combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2136054A1 (en) 2008-06-18 2009-12-23 Caterpillar Motoren GmbH & Co. KG Method and device for controlling the operation of an internal combustion engine
EP2634389A1 (en) 2012-02-28 2013-09-04 Caterpillar Motoren GmbH & Co. KG Self ignition operation of alternative fuel internal combustion engines
WO2013127527A1 (en) 2012-02-28 2013-09-06 Caterpillar Motoren Gmbh & Co. Kg Self ignition operation of alternative fuel internal combustion engines
EP2677142A1 (en) 2012-06-22 2013-12-25 Caterpillar Motoren GmbH & Co. KG Method and device for controlling the operation of dual-fuel engine
WO2013189603A1 (en) 2012-06-22 2013-12-27 Caterpillar Motoren Gmbh & Co. Kg Method and device for controlling the operation of dual-fuel engine
EP2752561A1 (en) 2013-01-07 2014-07-09 Caterpillar Motoren GmbH & Co. KG Method and device for controlling the operation of an internal combustion engine
EP2752571A1 (en) 2013-01-07 2014-07-09 Caterpillar Motoren GmbH & Co. KG Method and device for controlling the operation of a dual fuel engine

Also Published As

Publication number Publication date
EP1273795B1 (en) 2005-07-13
ATE299555T1 (en) 2005-07-15
DE50203607D1 (en) 2005-08-18
EP1273795A3 (en) 2004-08-25

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