EP1120557A2 - Device for operating a vehicle engine with a starter - Google Patents

Device for operating a vehicle engine with a starter Download PDF

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Publication number
EP1120557A2
EP1120557A2 EP00127063A EP00127063A EP1120557A2 EP 1120557 A2 EP1120557 A2 EP 1120557A2 EP 00127063 A EP00127063 A EP 00127063A EP 00127063 A EP00127063 A EP 00127063A EP 1120557 A2 EP1120557 A2 EP 1120557A2
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EP
European Patent Office
Prior art keywords
electric motor
internal combustion
combustion engine
fuel pump
fuel
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Withdrawn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
EP00127063A
Other languages
German (de)
French (fr)
Other versions
EP1120557A3 (en
Inventor
Klaus Joos
Jens Wolber
Thomas Frenz
Markus Amler
Hansjoerg Bochum
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1120557A2 publication Critical patent/EP1120557A2/en
Publication of EP1120557A3 publication Critical patent/EP1120557A3/en
Withdrawn legal-status Critical Current

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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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • 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
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/06—Feeding by means of driven pumps mechanically driven
    • 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
    • F02N11/00—Starting of engines by means of electric motors

Definitions

  • the invention relates to an operating device for an internal combustion engine of a motor vehicle with a Starter according to the preamble of claim 1.
  • Such a facility with a starter is off literature, car electronics, car electronics, Vieweg Verlag, 1998 page 191.
  • the starter of the operating facility has an electric motor.
  • the electric motor With the known Operating equipment, the electric motor is only used for a short time Start the engine and operated during the No longer operating the fuel press.
  • the electric motor the starter must be sufficiently dimensioned to be under starting the internal combustion engine in all circumstances ensure.
  • the electric motor will Weight of the motor vehicle increases and this remains during the operation of the internal combustion engine unused.
  • Fuel pump is used by a given Injection pressure of the fuel is generated. With little Delivery pressures are driven by an electric motor Fuel pumps are used and are at high discharge pressure mechanically driven by the internal combustion engine Fuel pumps used. There is a large discharge pressure for example with direct fuel injection in the combustion chambers of the cylinders of the internal combustion engine required. This is what is known as direct petrol injection with spark-ignited internal combustion engines Case.
  • the operating device according to the invention with the features according to claim 1 has the advantage that the Electric motor of the starter is better used and that for the fuel pump does not require its own drive.
  • FIG. 1 shows an operating device for an internal combustion engine of a motor vehicle in schematic representation according to a first Embodiment and Figure 2, the operating facility according to a second embodiment.
  • FIG. 1 and 2 is an operating device for a Internal combustion engine 10 of a motor vehicle shown.
  • the Operating device has a starter 12 to the To start internal combustion engine 10.
  • the starter 12 has an electric motor 14 which is sufficient is dimensioned to the internal combustion engine 10 among all To be able to put it into operation safely.
  • the Electric motor 14 has a motor shaft 16, which at Powering the electric motor 14 in a rotary motion is driven.
  • a gear 18 is located on the motor shaft 16 non-rotatably arranged with a gear 20 with essential smaller diameter, a pinion 20 is engaged.
  • the pinion 20 is rotatably connected to a shaft 22 which approximately parallel to the motor shaft 16, offset from this is arranged.
  • With the shaft 22 is at one end another gear 24 with a small diameter rotatably connected, which forms a starter pinion.
  • the shaft 22 is on one or more bearing points 26 rotatably mounted.
  • the internal combustion engine 10 has, for example Crankshaft with which a gear 28 is connected in a rotationally fixed manner which has a much larger diameter than the starter pinion 24.
  • the starter 12 has one Electromagnet 30 on, by means of which the shaft 22 in the direction its longitudinal axis is displaceable.
  • the electromagnet 30 has a coil 32 surrounding the shaft 22 and one on the Shaft 22 arranged armature 34. If the coil 32 of the Electromagnet 30 is not current-carrying, so located the shaft 22 in a right hand shown in Figure 1 Position in which the starter pinion 24 does not engage the gear 28 of the internal combustion engine 10.
  • the electric motor 14 in Operation set and the coil 32 of the electromagnet 30th energized.
  • the shaft 22 is, according to FIG. 1, in a left position Position shifted in which the starter pinion 24 is engaged with the gear 28 of the internal combustion engine 10.
  • the Motor shaft 16 is via the gear 18 and the pinion 20 Shaft 22 driven and by the shaft 22 is on the Starter pinion 24 and the gear 28 the crankshaft Internal combustion engine 10 driven.
  • the shaft 22 is replaced by a Reset device, for example in the form of a spring 36 moved back to its right position, in which the Starter pinion 24 no longer meshes with gear 28 stands.
  • the electromagnet 30 can also be separate from the shaft 22 may be arranged, this over a Transmission device such as one Engagement lever causes a displacement of the shaft 22.
  • the internal combustion engine 10 is preferably a spark ignition internal combustion engine and has a Injection system through which fuel into the Intake system or directly into the combustion chambers of the cylinders Internal combustion engine 10 is injected. Through the Injection system, fuel is injected under pressure, for which a fuel pump 40 is provided. When a Fuel injection into the intake system of the Internal combustion engine 10 takes place, so this is only one low pressure of up to about 5bar, which is sufficient Fuel pump 40 is generated. When a Fuel injection directly into the combustion chambers of the cylinders of the internal combustion engine 10, this is a higher pressure of about 30 to 100 bar required by the fuel pump 40 must be generated.
  • the Fuel pump 40 can be used as a flow pump or as Displacement pump be formed. According to the invention provided that the fuel pump 40 does not have its own Has drive, but that the electric motor 14 of the Starter 12 at least indirectly to drive the Fuel pump 40 is used.
  • FIG 1 the operating device according to a first Embodiment for driving the fuel pump shown.
  • the shaft 22 With the shaft 22 is the other Starter pinion 24 opposite end a gear 42 rotatably connected, which forms a pump pinion.
  • the Fuel pump 40 has a drive shaft 44 with which a gear 46 is rotatably connected. If the wave 22 is in its right position according to Figure 1, so the pump pinion 42 is in engagement with the gear 46.
  • the electric motor 14 is in operation, the Shaft 22 via the pump pinion 42 and the gear 46 Drive shaft 44 and thus fuel pump 40 driven so that this promotes fuel.
  • the Electric motor 14 is used during operation of the Internal combustion engine 10 operated to deliver fuel by the fuel pump 40.
  • the operation of the electric motor 14 can be controlled by a control device 48 be controlled or regulated, the speed at which the electric motor 14 for driving the fuel pump 40 is operated by the speed at which the electric motor 14th is operated to start the internal combustion engine 10, can deviate.
  • the electromagnet 30 to start the Internal combustion engine 10 is in the energized state, so located the shaft 22 according to FIG. 1 in its left position, so that the starter pinion 24 is in engagement with the gear 28 and the pump pinion 42 does not mesh with the gear 46 stands so that the fuel pump 40 is not driven.
  • the fuel requirement of the internal combustion engine 10 can be dependent be different from their operating parameters, so that the amount of fuel generated by the fuel pump 40 must be promoted, is not constant but changeable. Also the pressure with which the fuel is optimal is injected, depending on the operating parameters Internal combustion engine 10 may be different. It can be provided that by the control device 48 Electric motor 14 is operated such that Fuel pump 40 the required amount of fuel is promoted and / or the required pressure is generated becomes. The electric motor can be controlled by the control device 48 14 for varying the speed of the fuel pump 40 and thus the fuel delivery rate and / or the pressure be operated clocked, for example.
  • the electromagnet 30 forms a coupling device that optionally the drive of the Internal combustion engine 10 for starting by the electric motor 14 enables and in the de-energized state to drive the Fuel pump 40 during operation of the Internal combustion engine 10 made possible by the electric motor 14.
  • the motor shaft 16 with the gear 18, the shaft 22 with the Pinion 20 as well as the pump pinion 42 and the drive shaft 44 with the gear 46 form a transmission device for Transmission of the rotary motion of the electric motor 14 and Drive the fuel pump 40.
  • FIG 2 the operating device according to a second Embodiment for driving the fuel pump 40 shown.
  • the structure of the starter 12 is essentially same as in the first embodiment, the Electric motor 14 via the motor shaft 116 arranged gear 18, which engages with the pinion 20 stands, drives the shaft 22, which in turn is energized Electromagnet 30 via the starter pinion 24, which with the Gear 28 is engaged, the crankshaft Internal combustion engine 10 drives to start.
  • the motor shaft 116 protrudes on the side opposite the gear 18 the electric motor 14 and serves as a drive shaft for the Fuel pump 40.
  • the fuel pump 40 can be approximately coaxial be arranged to the motor shaft 116 or to the motor shaft 116 offset, then a transmission device for the Rotary movement of the motor shaft 116 on a drive shaft Fuel pump 40 is provided, for example in the form a transmission, a belt or chain drive.
  • the Fuel pump 40 constantly, so also during Starting the internal combustion engine 10 via the starter 12, are driven.
  • the electric motor 14 is powered by the voltage of the on-board battery of the motor vehicle, which is usually about 12 volts is.
  • the one explained above is particularly advantageous Drive the fuel pump 40 when the motor vehicle is with an on-board battery with a voltage of about 42 volts for the operation of the electric motor 14 is equipped.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

Die Betriebseinrichtung weist einen Starter (12) mit einem Elektromotor (14) zum Starten der Brennkraftmaschine (10) auf. Durch den Elektromotor (14) wird zum Starten der Brennkraftmaschine (10) über ein Getriebe die Kurbelwelle der Brennkraftmaschine (10) angetrieben. Die Brennkraftmaschine (10) weist eine Kraftstoffeinspritzeinrichtung auf, durch die Kraftstoff in die Ansauganlage oder direkt in die Brennräume der Zylinder der Brennkraftmaschine (10) eingespritzt wird. Die Kraftstoffeinspritzeinrichtung weist eine Kraftstoffpumpe (40) auf, um Kraftstoff in der erforderlichen Menge zu fördern und auf den erforderlichen Einspritzdruck zu verdichten. Für den Antrieb der Kraftstoffpumpe (40) wird der Elektromotor (14) genutzt, wobei die Kraftstoffpumpe (40) permanent oder nach dem Starten der Brennkraftmaschine (10) durch den Elektromotor (14) angetrieben werden kann. Für die Kraftstoffpumpe (40) ist somit kein eigener Antriebsmotor erforderlich. <IMAGE>The operating device has a starter (12) with an electric motor (14) for starting the internal combustion engine (10). The crankshaft of the internal combustion engine (10) is driven by the electric motor (14) to start the internal combustion engine (10) via a gear. The internal combustion engine (10) has a fuel injection device, through which fuel is injected into the intake system or directly into the combustion chambers of the cylinders of the internal combustion engine (10). The fuel injector has a fuel pump (40) to deliver fuel in the required amount and to compress it to the required injection pressure. The electric motor (14) is used to drive the fuel pump (40), wherein the fuel pump (40) can be driven permanently or after the internal combustion engine (10) has been started by the electric motor (14). A separate drive motor is therefore not required for the fuel pump (40). <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Betriebseinrichtung für eine Brennkraftmaschine eines Kraftfahrzeugs mit einem Starter nach der Gattung des Anspruchs 1.The invention relates to an operating device for an internal combustion engine of a motor vehicle with a Starter according to the preamble of claim 1.

Eine solche Betriebseinrichtung mit einem Starter ist aus der Literatur, Autoelektrik, Autoelektronik, Vieweg Verlag, 1998 Seite 191, bekannt. Der Starter der Betriebseinrichtung weist dabei einen Elektromotor auf. Bei der bekannten Betriebseinrichtung wird der Elektromotor nur kurzzeitig zum Starten der Brennkraftmaschine betrieben und während des Betriebs der Brennkaftmaschine nicht mehr. Der Elektromotor des Starters muß ausreichend dimensioniert sein, um unter allen Umständen ein Starten der Brennkraftmaschine sicherzustellen. Durch den Elektromotor wird somit das Gewicht des Kraftfahrzeugs erhöht und dieser bleibt während des Betriebs der Brennkraftmaschine ungenutzt.Such a facility with a starter is off literature, car electronics, car electronics, Vieweg Verlag, 1998 page 191. The starter of the operating facility has an electric motor. With the known Operating equipment, the electric motor is only used for a short time Start the engine and operated during the No longer operating the fuel press. The electric motor the starter must be sufficiently dimensioned to be under starting the internal combustion engine in all circumstances ensure. The electric motor will Weight of the motor vehicle increases and this remains during the operation of the internal combustion engine unused.

Es ist darüberhinaus bekannt, daß für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine eine Kraftstoffpumpe verwendet wird, durch die ein vorgegebener Einspritzdruck des Kraftstoffs erzeugt wird. Bei geringem Förderdruck werden mit einem Elektromotor angetriebene Kraftstoffpumpen verwendet und bei großem Förderdruck werden mechanisch durch die Brennkraftmaschine angetriebene Kraftstoffpumpen verwendet. Ein großer Förderdruck ist beispielsweise bei direkter Einspritzung des Kraftstoffs in die Brennräume der Zylinder der Brennkraftmaschine erforderlich. Dies ist bei sogenannter Benzin-Direkt-Einspritzung bei fremdgezündeten Brennkraftmaschinen der Fall.It is also known that for a Fuel injection device of an internal combustion engine Fuel pump is used by a given Injection pressure of the fuel is generated. With little Delivery pressures are driven by an electric motor Fuel pumps are used and are at high discharge pressure mechanically driven by the internal combustion engine Fuel pumps used. There is a large discharge pressure for example with direct fuel injection in the combustion chambers of the cylinders of the internal combustion engine required. This is what is known as direct petrol injection with spark-ignited internal combustion engines Case.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Betriebseinrichtung mit den Merkmalen gemäß Anspruch 1 hat demgegenüber den Vorteil, daß der Elektromotor des Starters besser genutzt wird und daß für die Kraftstoffpumpe kein eigener Antrieb erforderlich ist.The operating device according to the invention with the features according to claim 1 has the advantage that the Electric motor of the starter is better used and that for the fuel pump does not require its own drive.

In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Betriebseinrichtung angegeben. Aufgrund der Dimensionierung des Elektromotors zum Starten der Brennkraftmaschine kann dieser auch wie im Anspruch 2 angegeben zum Antrieb einer Kraftstoffpumpe genutzt werden, die einen hohen Förderdruck erzeugt, wie er bei Kraftstoffeinspritzung direkt in die Brennräume der Zylinder der Brennkraftmaschine erforderlich ist. Durch die Ausbildung gemäß Anspruch 3 ist sichergestellt, daß zum Starten der Brennkraftmaschine die gesamte Leistung des Elektromotors zur Verfügung steht.In the dependent claims are advantageous Refinements and developments of the invention Factory equipment specified. Because of the dimensioning of the electric motor for starting the internal combustion engine this also as specified in claim 2 for driving one Fuel pumps are used that have a high delivery pressure generated as it is with fuel injection directly into the Combustion chambers of the cylinders of the internal combustion engine are required is. By training according to claim 3 ensured that to start the engine total power of the electric motor is available.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine Betriebseinrichtung für eine Brennkraftmaschine eines Kraftfahrzeugs in schematischer Darstellung gemäß einem ersten Ausführungsbeispiel und Figur 2 die Betriebseinrichtung gemäß einem zweiten Ausführungsbeispiel.Two embodiments of the invention are in the Drawing shown and in the description below explained in more detail. 1 shows an operating device for an internal combustion engine of a motor vehicle in schematic representation according to a first Embodiment and Figure 2, the operating facility according to a second embodiment.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In den Figuren 1 und 2 ist eine Betriebseinrichtung für eine Brennkraftmaschine 10 eines Kraftfahrzeugs dargestellt. Die Betriebseinrichtung weist einen Starter 12 auf, um die Brennkraftmaschine 10 in Betrieb zu setzen. Der Starter 12 weist einen Elektromotor 14 auf, der ausreichend dimensioniert ist, um die Brennkraftmaschine 10 unter allen Umständen sicher in Betrieb setzen zu können. Der Elektromotor 14 weist eine Motorwelle 16 auf, die bei Bestromung des Elektromotors 14 in einer Drehbewegung angetrieben wird. Auf der Motorwelle 16 ist ein Zahnrad 18 drehfest angeordnet, das mit einem Zahnrad 20 mit wesentlich kleinerem Durchmesser, einem Ritzel 20 in Eingriff steht. Das Ritzel 20 ist drehfest mit einer Welle 22 verbunden, die etwa parallel zur Motorwelle 16, zu dieser versetzt angeordnet ist. Mit der Welle 22 ist an einem Ende ein weiteres Zahnrad 24 mit kleinem Durchmesser drehfest verbunden, das ein Starterritzel bildet. Die Welle 22 ist an einer oder mehreren Lagerstellen 26 drehbar gelagert.In Figures 1 and 2 is an operating device for a Internal combustion engine 10 of a motor vehicle shown. The Operating device has a starter 12 to the To start internal combustion engine 10. The starter 12 has an electric motor 14 which is sufficient is dimensioned to the internal combustion engine 10 among all To be able to put it into operation safely. The Electric motor 14 has a motor shaft 16, which at Powering the electric motor 14 in a rotary motion is driven. A gear 18 is located on the motor shaft 16 non-rotatably arranged with a gear 20 with essential smaller diameter, a pinion 20 is engaged. The pinion 20 is rotatably connected to a shaft 22 which approximately parallel to the motor shaft 16, offset from this is arranged. With the shaft 22 is at one end another gear 24 with a small diameter rotatably connected, which forms a starter pinion. The shaft 22 is on one or more bearing points 26 rotatably mounted.

Die Brennkraftmaschine 10 weist beispielsweise eine Kurbelwelle auf, mit der ein Zahnrad 28 drehfest verbunden ist, das einen wesentlich größeren Durchmesser aufweist als das Starterritzel 24. Der Starter 12 weist einen Elektromagneten 30 auf, mittels dem die Welle 22 in Richtung ihrer Längsachse verschiebbar ist. Der Elektromagnet 30 weist eine die Welle 22 umgebende Spule 32 und einen an der Welle 22 angeordneten Anker 34 auf. Wenn die Spule 32 des Elektromagneten 30 nicht stromdurchflossen ist, so befindet sich die Welle 22 in einer in Figur 1 dargestellten rechten Stellung, in der das Starterritzel 24 nicht in Eingriff mit dem Zahnrad 28 der Brennkraftmaschine 10 steht. Zum Starten der Brennkraftmaschine 10 wird der Elektromotor 14 in Betrieb gesetzt und die Spule 32 des Elektromagneten 30 bestromt. Wenn durch die Spule 32 ein Strom fließt, so wird durch diesen ein Magnetfeld erzeugt, durch das der Anker 34 und damit die Welle 22 in die Spule 32 hineingezogen wird. Die Welle 22 wird dabei gemäß Figur 1 in eine linke Stellung Stellung verschoben, in der das Starterritzel 24 in Eingriff mit dem Zahnrad 28 der Brennkraftmaschine 10 steht. Von der Motorwelle 16 wird über das Zahnrad 18 und das Ritzel 20 die Welle 22 angetrieben und durch die Welle 22 wird über das Starterritzel 24 und das Zahnrad 28 die Kurbelwelle der Brennkraftmaschine 10 angetrieben. Nach dem Starten der Brennkraftmaschine 10 wird die Spule 32 des Elektromagneten 30 wieder stromlos und die Welle 22 wird durch eine Rückstelleinrichtung, beispielsweise in Form einer Feder 36 wieder in ihre rechte Stellung verschoben, in der das Starterritzel 24 nicht mehr in Eingriff mit dem Zahnrad 28 steht. Der Elektromagnet 30 kann auch getrennt von der Welle 22 angeordnet sein, wobei dieser über eine Übertragungseinrichtung wie beispielsweise einen Einrückhebel eine Verschiebung der Welle 22 bewirkt.The internal combustion engine 10 has, for example Crankshaft with which a gear 28 is connected in a rotationally fixed manner which has a much larger diameter than the starter pinion 24. The starter 12 has one Electromagnet 30 on, by means of which the shaft 22 in the direction its longitudinal axis is displaceable. The electromagnet 30 has a coil 32 surrounding the shaft 22 and one on the Shaft 22 arranged armature 34. If the coil 32 of the Electromagnet 30 is not current-carrying, so located the shaft 22 in a right hand shown in Figure 1 Position in which the starter pinion 24 does not engage the gear 28 of the internal combustion engine 10. To start the engine 10, the electric motor 14 in Operation set and the coil 32 of the electromagnet 30th energized. When a current flows through the coil 32, so this generates a magnetic field through which the armature 34 and thus the shaft 22 is drawn into the coil 32. The shaft 22 is, according to FIG. 1, in a left position Position shifted in which the starter pinion 24 is engaged with the gear 28 of the internal combustion engine 10. Of the Motor shaft 16 is via the gear 18 and the pinion 20 Shaft 22 driven and by the shaft 22 is on the Starter pinion 24 and the gear 28 the crankshaft Internal combustion engine 10 driven. After starting the Internal combustion engine 10 becomes coil 32 of the electromagnet 30 again without current and the shaft 22 is replaced by a Reset device, for example in the form of a spring 36 moved back to its right position, in which the Starter pinion 24 no longer meshes with gear 28 stands. The electromagnet 30 can also be separate from the shaft 22 may be arranged, this over a Transmission device such as one Engagement lever causes a displacement of the shaft 22.

Die Brennkraftmaschine 10 ist vorzugsweise eine fremdgezündete Brennkraftmaschine und weist eine Einspritzanlage auf, durch die Kraftstoff in die Ansauganlage oder direkt in die Brennräume der Zylinder der Brennkraftmaschine 10 eingespritzt wird. Durch die Einspritzanlage wird Kraftstoff unter Druck eingespritzt, wozu eine Kraftstoffpumpe 40 vorgesehen ist. Wenn eine Kraftstoffeinspritzung in die Ansauganlage der Brennkraftmaschine 10 erfolgt, so ist hierfür nur ein geringer Druck von bis etwa 5bar ausreichend, der durch die Kraftstoffpumpe 40 erzeugt wird. Wenn eine Kraftstoffeinspritzung direkt in die Brennräume der Zylinder der Brennkraftmaschine 10 erfolgt, so ist hierfür ein höherer Druck von etwa 30 bis 100bar erforderlich, der durch die Kraftstoffpumpe 40 erzeugt werden muß. Die Kraftstoffpumpe 40 kann als Strömungspumpe oder als Verdrängerpumpe ausgebildet sein. Erfindungsgemäß ist vorgesehen, daß die Kraftstoffpumpe 40 keinen eigenen Antrieb aufweist, sondern daß der Elektromotor 14 des Starters 12 zumindest mittelbar zum Antrieb der Kraftstoffpumpe 40 genutzt wird.The internal combustion engine 10 is preferably a spark ignition internal combustion engine and has a Injection system through which fuel into the Intake system or directly into the combustion chambers of the cylinders Internal combustion engine 10 is injected. Through the Injection system, fuel is injected under pressure, for which a fuel pump 40 is provided. When a Fuel injection into the intake system of the Internal combustion engine 10 takes place, so this is only one low pressure of up to about 5bar, which is sufficient Fuel pump 40 is generated. When a Fuel injection directly into the combustion chambers of the cylinders of the internal combustion engine 10, this is a higher pressure of about 30 to 100 bar required by the fuel pump 40 must be generated. The Fuel pump 40 can be used as a flow pump or as Displacement pump be formed. According to the invention provided that the fuel pump 40 does not have its own Has drive, but that the electric motor 14 of the Starter 12 at least indirectly to drive the Fuel pump 40 is used.

In Figur 1 ist die Betriebseinrichtung gemäß einem ersten Ausführungsbeispiel zum Antrieb der Kraftstoffpumpe dargestellt. Mit der Welle 22 ist dabei an deren dem Starterritzel 24 gegenüberliegendem Ende ein Zahnrad 42 drehfest verbunden, das ein Pumpenritzel bildet. Die Kraftstoffpumpe 40 weist eine Antriebswelle 44 auf, mit der ein Zahnrad 46 drehfest verbunden ist. Wenn sich die Welle 22 in ihrer rechten Stellung gemäß Figur 1 befindet, so steht das Pumpenritzel 42 in Eingriff mit dem Zahnrad 46. Wenn der Elektromotor 14 in Betrieb ist, so wird von der Welle 22 über das Pumpenritzel 42 und das Zahnrad 46 die Antriebswelle 44 und damit die Kraftstoffpumpe 40 angetrieben, so daß diese Kraftstoff fördert. Der Elektromotor 14 wird während des Betriebs der Brennkraftmaschine 10 betrieben, um eine Kraftstofförderung durch die Kraftstoffpumpe 40 aufrechtzuerhalten. Der Betrieb des Elektromotors 14 kann durch eine Steuereinrichtung 48 gesteuert oder geregelt werden, wobei die Drehzahl, mit der der Elektromotor 14 zum Antrieb der Kraftstoffpumpe 40 betrieben wird von der Drehzahl, mit der der Elektromotor 14 zum Starten der Brennkraftmaschine 10 betrieben wird, abweichen kann. Wenn der Elektromagnet 30 zum Starten der Brennkraftmaschine 10 in bestromtem Zustand ist, so befindet sich die Welle 22 gemäß Figur 1 in ihrer linken Stellung, so daß das Starterritzel 24 in Eingriff mit dem Zahnrad 28 ist und das Pumpenritzel 42 nicht in Eingriff mit dem Zahnrad 46 steht, so daß die Kraftstoffpumpe 40 nicht angetrieben wird.In Figure 1, the operating device according to a first Embodiment for driving the fuel pump shown. With the shaft 22 is the other Starter pinion 24 opposite end a gear 42 rotatably connected, which forms a pump pinion. The Fuel pump 40 has a drive shaft 44 with which a gear 46 is rotatably connected. If the wave 22 is in its right position according to Figure 1, so the pump pinion 42 is in engagement with the gear 46. When the electric motor 14 is in operation, the Shaft 22 via the pump pinion 42 and the gear 46 Drive shaft 44 and thus fuel pump 40 driven so that this promotes fuel. The Electric motor 14 is used during operation of the Internal combustion engine 10 operated to deliver fuel by the fuel pump 40. The operation of the electric motor 14 can be controlled by a control device 48 be controlled or regulated, the speed at which the electric motor 14 for driving the fuel pump 40 is operated by the speed at which the electric motor 14th is operated to start the internal combustion engine 10, can deviate. When the electromagnet 30 to start the Internal combustion engine 10 is in the energized state, so located the shaft 22 according to FIG. 1 in its left position, so that the starter pinion 24 is in engagement with the gear 28 and the pump pinion 42 does not mesh with the gear 46 stands so that the fuel pump 40 is not driven.

Der Kraftstoffbedarf der Brennkraftmaschine 10 kann abhängig von deren Betriebsparametern unterschiedlich sein, so daß die Kraftstoffmenge, die durch die Kraftstoffpumpe 40 gefördert werden muß, nicht konstant ist sondern veränderlich. Auch der Druck, mit dem der Kraftstoff optimal eingespritzt wird, kann abhängig von Betriebsparametern der Brennkraftmaschine 10 unterschiedlich sein. Es kann vorgesehen sein, daß durch die Steuereinrichtung 48 der Elektromotor 14 derart betrieben wird, daß durch die Kraftstoffpumpe 40 die erforderliche Kraftstoffmenge gefördert wird und/oder der erforderliche Druck erzeugt wird. Durch die Steuereinrichtung 48 kann der Elektromotor 14 zur Variation der Drehzahl der Kraftstoffpumpe 40 und damit der Kraftstoffördermenge und/oder des Drucks beispielsweise getaktet betrieben werden.The fuel requirement of the internal combustion engine 10 can be dependent be different from their operating parameters, so that the amount of fuel generated by the fuel pump 40 must be promoted, is not constant but changeable. Also the pressure with which the fuel is optimal is injected, depending on the operating parameters Internal combustion engine 10 may be different. It can be provided that by the control device 48 Electric motor 14 is operated such that Fuel pump 40 the required amount of fuel is promoted and / or the required pressure is generated becomes. The electric motor can be controlled by the control device 48 14 for varying the speed of the fuel pump 40 and thus the fuel delivery rate and / or the pressure be operated clocked, for example.

Der Elektromagnet 30 bildet eine Kupplungseinrichtung, die wahlweise in bestromtem Zustand den Antrieb der Brennkraftmaschine 10 zum Starten durch den Elektromotor 14 ermöglicht und in nicht bestromtem Zustand den Antrieb der Kraftstoffpumpe 40 während des Betriebs der Brennkraftmaschine 10 durch den Elektromotor 14 ermöglicht. Die Motorwelle 16 mit dem Zahnrad 18, die Welle 22 mit dem Ritzel 20 sowie das Pumpenritzel 42 und die Antriebswelle 44 mit dem Zahnrad 46 bilden eine Übertragungseinrichtung zur Übertragung der Drehbewegung des Elektromotors 14 und zum Antrieb der Kraftstoffpumpe 40.The electromagnet 30 forms a coupling device that optionally the drive of the Internal combustion engine 10 for starting by the electric motor 14 enables and in the de-energized state to drive the Fuel pump 40 during operation of the Internal combustion engine 10 made possible by the electric motor 14. The motor shaft 16 with the gear 18, the shaft 22 with the Pinion 20 as well as the pump pinion 42 and the drive shaft 44 with the gear 46 form a transmission device for Transmission of the rotary motion of the electric motor 14 and Drive the fuel pump 40.

In Figur 2 ist die Betriebseinrichtung gemäß einem zweiten Ausführungsbeispiel zum Antrieb der Kraftstoffpumpe 40 dargestellt. Der Aufbau des Starters 12 ist im wesentlichen gleich wie beim ersten Ausführungsbeispiel, wobei der Elektromotor 14 über das auf dessen Motorwelle 116 angeordnete Zahnrad 18, das mit dem Ritzel 20 in Eingriff steht, die Welle 22 antreibt, die wiederum bei bestromtem Elektromagneten 30 über das Starterritzel 24, das mit dem Zahnrad 28 in Eingriff steht, die Kurbelwelle der Brennkraftmaschine 10 zum Starten antreibt. Die Motorwelle 116 ragt auf der dem Zahnrad 18 gegenüberliegenden Seite aus dem Elektromotor 14 und dient als Antriebswelle für die Kraftstoffpumpe 40. Die Kraftstoffpumpe 40 kann etwa koaxial zur Motorwelle 116 angeordnet sein oder zur Motorwelle 116 versetzt, wobei dann eine Übertragungseinrichtung für die Drehbewegung der Motorwelle 116 auf eine Antriebswelle der Kraftstoffpumpe 40 vorgesehen ist, beispielsweise in Form eines Getriebes, eines Riemen- oder Kettentriebes. Bei der Betriebseinrichtung gemäß dem zweiten Ausführungsbeispiel kann die Kraftstoffpumpe 40 ständig, also auch während des Startens der Brennkraftmaschine 10 über den Starter 12, angetrieben werden.In Figure 2, the operating device according to a second Embodiment for driving the fuel pump 40 shown. The structure of the starter 12 is essentially same as in the first embodiment, the Electric motor 14 via the motor shaft 116 arranged gear 18, which engages with the pinion 20 stands, drives the shaft 22, which in turn is energized Electromagnet 30 via the starter pinion 24, which with the Gear 28 is engaged, the crankshaft Internal combustion engine 10 drives to start. The motor shaft 116 protrudes on the side opposite the gear 18 the electric motor 14 and serves as a drive shaft for the Fuel pump 40. The fuel pump 40 can be approximately coaxial be arranged to the motor shaft 116 or to the motor shaft 116 offset, then a transmission device for the Rotary movement of the motor shaft 116 on a drive shaft Fuel pump 40 is provided, for example in the form a transmission, a belt or chain drive. In the Operating device according to the second embodiment can the fuel pump 40 constantly, so also during Starting the internal combustion engine 10 via the starter 12, are driven.

Der Elektromotor 14 wird mit der Spannung der Bordbatterie des Kraftfahrzeugs betrieben, die üblicherweise etwa 12 Volt beträgt. Besonders vorteilhaft ist der vorstehend erläuterte Antrieb der Kraftstoffpumpe 40, wenn das Kraftfahrzeug mit einer Bordbatterie mit einer Spannung von etwa 42 Volt für den Betrieb des Elektromotors 14 ausgerüstet ist.The electric motor 14 is powered by the voltage of the on-board battery of the motor vehicle, which is usually about 12 volts is. The one explained above is particularly advantageous Drive the fuel pump 40 when the motor vehicle is with an on-board battery with a voltage of about 42 volts for the operation of the electric motor 14 is equipped.

Claims (9)

Betriebseinrichtung für eine Brennkraftmaschine eines Kraftfahrzeugs mit einem Starter (12), der einen Elektromotor (14) aufweist, dadurch gekennzeichnet, daß der Elektromotor (14) zusätzlich zumindest mittelbar zum Antrieb einer Kraftstoffpumpe (40) genutzt wird.Operating device for an internal combustion engine Motor vehicle with a starter (12), the one Electric motor (14), characterized in that the Electric motor (14) additionally at least indirectly for driving a fuel pump (40) is used. Betriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Kraftstoffpumpe (40) eine Hochdruckpumpe ist, die einen Druck von etwa 30bar bis etwa 100bar erzeugt.Operating device according to claim 1, characterized characterized in that the fuel pump (40) a High pressure pump, which has a pressure of about 30bar to about 100bar generated. Betriebseinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kraftstoffpumpe (40) während des mittels des Starters (12) erfolgenden Startens der Brennkraftmaschine (10) vom Elektromotor (14) abgekoppelt ist.Operating device according to claim 1 or 2, characterized characterized in that the fuel pump (40) during the by means of the starter (12) starting the Internal combustion engine (10) uncoupled from the electric motor (14) is. Betriebseinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kraftstoffpumpe (40) permanent durch den Elektromotor (14) angetrieben wird.Operating device according to claim 1 or 2, characterized characterized in that the fuel pump (40) permanently by the electric motor (14) is driven. Betriebseinrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Kraftstoffpumpe (40) direkt durch den Elektromotor (14) angetrieben wird.Operating device according to one of the preceding Claims, characterized in that the fuel pump (40) is driven directly by the electric motor (14). Betriebseinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Kraftstoffpumpe (40) über eine Übertragungseinrichtung durch den Elektromotor (14) angetrieben wird. Operating device according to one of claims 1 to 4, characterized in that the fuel pump (40) over a transmission device through the electric motor (14) is driven. Betriebseinrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß eine Kupplungseinrichtung (30) vorgesehen ist, die wahlweise entweder den Antrieb der Brennkraftmaschine (10) zum Starten durch den Elektromotor (14) ermöglicht oder den Antrieb der Kraftstoffpumpe (40) während des Betriebs der Brennkraftmaschine (10) durch den Elektromotor (14) ermöglicht.Operating device according to one of the preceding Claims, characterized in that a Coupling device (30) is provided, which is optional either the drive of the internal combustion engine (10) for starting made possible by the electric motor (14) or the drive of the Fuel pump (40) during operation of the Internal combustion engine (10) by the electric motor (14) enables. Betriebseinrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Elektromotor (14) zum Antrieb der Kraftstoffpumpe (40) mit einer anderen Drehzahl betrieben wird als zum Starten der Brennkraftmaschine (10).Operating device according to one of the preceding Claims, characterized in that the electric motor (14) to drive the fuel pump (40) with another Speed is operated as to start the Internal combustion engine (10). Betriebseinrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der Elektromotor (14) zum Antrieb der Kraftstoffpumpe (40) mit derart veränderlicher Drehzahl betrieben wird, daß daß durch die Kraftstoffpumpe (40) eine vorgegebene Kraftstoffmenge gefördert und/oder ein vorgegebener Kraftstoffdruck erzeugt wird.Operating device according to claim 8, characterized characterized in that the electric motor (14) for driving the Fuel pump (40) with such a variable speed is operated that that by the fuel pump (40) predefined amount of fuel promoted and / or predetermined fuel pressure is generated.
EP00127063A 2000-01-28 2000-12-11 Device for operating a vehicle engine with a starter Withdrawn EP1120557A3 (en)

Applications Claiming Priority (2)

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DE10003736 2000-01-28
DE10003736A DE10003736A1 (en) 2000-01-28 2000-01-28 Operating device for an internal combustion engine of a motor vehicle with a starter

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EP1120557A3 EP1120557A3 (en) 2002-06-26

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EP1120557A3 (en) 2002-06-26
US20010011537A1 (en) 2001-08-09
US6453879B2 (en) 2002-09-24
DE10003736A1 (en) 2001-08-02
JP2001227437A (en) 2001-08-24

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