EP1920157B1 - Electric starting device for an internal combustion engine - Google Patents

Electric starting device for an internal combustion engine Download PDF

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Publication number
EP1920157B1
EP1920157B1 EP06762887A EP06762887A EP1920157B1 EP 1920157 B1 EP1920157 B1 EP 1920157B1 EP 06762887 A EP06762887 A EP 06762887A EP 06762887 A EP06762887 A EP 06762887A EP 1920157 B1 EP1920157 B1 EP 1920157B1
Authority
EP
European Patent Office
Prior art keywords
starting device
electric starting
starter motor
combustion engine
spur gear
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.)
Not-in-force
Application number
EP06762887A
Other languages
German (de)
French (fr)
Other versions
EP1920157A1 (en
Inventor
Sebastian Sekira
Andreas Bilek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KTM Sportmotorcycle AG
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KTM Sportmotorcycle AG
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Filing date
Publication date
Application filed by KTM Sportmotorcycle AG filed Critical KTM Sportmotorcycle AG
Publication of EP1920157A1 publication Critical patent/EP1920157A1/en
Application granted granted Critical
Publication of EP1920157B1 publication Critical patent/EP1920157B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/006—Assembling or mounting of starting devices
    • 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
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • 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
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/13—Machine starters
    • Y10T74/131—Automatic
    • Y10T74/137—Reduction gearing

Definitions

  • the present invention relates to an electric starting device of an internal combustion engine according to the preamble of claim 1.
  • the starter motor is usually arranged on the drive motor so that the longitudinal center axis of the motor shaft of the starter motor is parallel to the central axis of the crankshaft, the engine.
  • the starter motor can be viewed in the direction of travel of the motorcycle in front of the crankshaft or, if it is to be mounted outside the engagement area, for example, by the front wheel of the motorcycle whirled stones or the like, behind the crankshaft.
  • the electric starter motor can put the crankshaft in rotation via a freewheel, wherein the freewheel can be mounted on the primary drive side or also on the ignition side of the crankcase.
  • the freewheel can be mounted on the primary drive side or also on the ignition side of the crankcase.
  • the freewheel usually runs in an oil bath, which is why such an arrangement is usually found in four-stroke engines.
  • the electric starter motor can be brought via an angle gearbox with the interposition of a thrust screwdriver with a toothing for acting on the crankshaft of the internal combustion engine in engagement.
  • the motor shaft of the starter motor can be mounted in a deviating from the parallel alignment to the central axis of the crankshaft installation situation due to the angular gear, for example, approximately at right angles to the crankshaft axis.
  • a worm screw is usually arranged on the motor shaft of the electric starter motor, which meshes with a worm wheel, wherein the crankshaft of the internal combustion engine can be set in rotation via the worm wheel.
  • an exact alignment of the screw to the worm wheel is required, both in terms of axial offset and angular offset.
  • Such an arrangement is for example based on the DE 197 12 968 A1 become known, which describes a reciprocating internal combustion engine with a worm gear-cranking device, which communicates via a freewheel with the crankshaft of the internal combustion engine and describes a connected to the electric starter motor screw, which meshes with the worm wheel.
  • Such a worm gear has In addition, a poor efficiency and requires a large and therefore heavy starter motor. Also, the self-locking of the worm gear can be a problem, namely, when the drive motor does not start, but beats back, as may be the case with large-volume single-cylinder engines.
  • an electric starting device with an angle gear in which the electric starter motor can be brought via an angle gearbox with the interposition of a screwdriver with a toothing for acting on a crankshaft of the internal combustion engine engaged and thus the internal combustion engine can be started electrically.
  • the toothing for an output pinion of the thrust screw drive is mounted on an external flywheel of the crankshaft, wherein this engine is a lawnmower engine.
  • the motor shaft of the electric starter motor runs at right angles to the axis of the crankshaft, the output shaft of this electric starter motor directly to the shaft of the thrust screw drive acts.
  • the direct drive of the thrust screwdriver via the electric starter motor requires a large diameter gearing, which in this case is mounted on the flywheel, which in turn results in a high rotational moment of inertia, which is undesirable in off-highway sport motorcycles.
  • the object of the invention to provide an electric starting device of an internal combustion engine, which is compact and lightweight and can also be attached to an existing internal combustion engine, be it factory or even for subsequent arrangement on the engine as add -on-component, so that it is also possible to provide a motor equipped with such an engine later with an electric starter. Also to be created according to the invention, a two-stroke internal combustion engine with an electric starter and a motorcycle equipped with such a two-stroke internal combustion engine.
  • the invention now provides for solving this problem, an electric starting device with the features of claim 1, wherein advantageous embodiments thereof are described in the further claims.
  • the invention also provides a two-stroke internal combustion engine according to claim 9 and a motorcycle according to claim 10.
  • the invention now provides an electric starting device of an internal combustion engine, with a starter motor, which is engageable via an angle gearbox with the interposition of a thrust screw drive with a toothing on a firing rotor for acting on a crankshaft of the internal combustion engine and the motor shaft of the starter motor is arranged substantially perpendicular to the crankshaft axis, wherein the angular gear has a crown gear and a spur gear, which are arranged non-rotatably on an intermediate shaft and the spur gear meshes with a spur gear of the thrust screw drive.
  • the electric starter motor or the motor shaft of the electric starter motor is not directly with the thrust screw engaged but with the interposition of a crown gear and a spur gear having angular gear, which on the one hand allows close-to-motor mounting of the starter motor, ie closely adjacent to a cylinder of the engine and / or to frame components of the frame of the motorcycle and beyond also a simple retrofitting of the electric starting device allows, as the crown wheel allows axial freedom of the spur gear of the electric starter motor and thus easy subsequent attachability, since the accuracy of the assembly and the axial alignment of Motor shaft of the electric starter motor relative to the crown wheel is lower than the requirements for mounting accuracy in a bevel gear having bevel gear.
  • an electric starting device with only low dead weight be implemented, ie the desired lightweight construction be taken into account, since due to the crown wheel even with operational deformations during operation of the electric starting device, the contact pattern between the spur gear of the motor shaft and the crown wheel is little affected at different loads.
  • the crown wheel can be finished, for example, by means of a cold press process and therefore, in contrast to a bevel gear toothing inexpensive to manufacture and assemble and allows greater assembly and manufacturing tolerances.
  • the arrangement of the starter motor is such that a longitudinal center axis of the motor shaft aligned in the direction of the spur gear teeth of the helical gear extends such that the longitudinal center axis and the spur gear teeth are arranged on one side of a longitudinal center plane of the crown wheel, so that a little space width consuming electric starting device possible is, in which the starter motor close to the cylinder and can be mounted close to the frame and thus outside the sphere of influence, for example, from the front wheel of the motorcycle whirled stones.
  • the angular gear and the thrust screw drive between a crankcase of the internal combustion engine and a Zündungsrotor covering cap, which is fixed to the crankcase are arranged.
  • the bevel gear and the thrust screw driver can be mounted below the shutter cover covering the ignition rotor, which is also referred to as the ignition cover, and hence out of the range of influence of the above-mentioned stones stirred by the front wheel.
  • this embodiment has the advantage that no modifications to the construction of the internal combustion engine are necessary, so that the internal combustion engine on the one hand as a pure Kickstarter solution is possible, as an internal combustion engine is possible with only one electric starter or as an internal combustion engine with both an electric starter and a kickstarter.
  • the starter motor is located outside of the closure cap and can be fixed by means of a support on a frame member of the single-track vehicle, which may be, for example, a competition-competitive off-road motorbike.
  • the frame component can be, for example, a frame support which is provided at the factory with a threaded projection or the like, to which the electric starter motor can be screwed by means of the support, the support may be a support having only a support or else about a two support beam having support, so that, for example, the electric starter motor can be fixed to the frame under cover by means of a V-shaped support.
  • Such a support can also be provided on the starter motor itself, for example integrated on a housing component of the starter motor. About this support the starter motor can then be set on the drive motor itself.
  • the starter motor can be set, for example, on the ignition cover by means of threaded bolts. The ignition cover in turn can be fixed to the crankcase of the drive motor, so that so that the starter motor is attached to the drive motor.
  • the arrangement of the starter motor on the frame component or on the drive motor is chosen such that it is viewed in the direction of travel of the single-track vehicle behind a combustion gas guide member and below and within an outer surface of a fuel tank of the single-track vehicle.
  • this means that the electric starter motor is set as close to the cylinder on the frame member or on the drive motor, that he in Direction seen behind an exhaust manifold, which may be in a two-stroke engine is a so-called two-stroke bulb is arranged, from which it is protected against the front wheel of the motorcycle stones and also underneath and inside an outer surface of the fuel tank of the motorcycle, so that the electric Starter motor does not come into contact with the ground even in a fall of the off-road sport motorcycle.
  • the arrangement of the thrust screw drive is chosen so that a longitudinal central axis of a, a plug-in pinion of the thrust screw shaft bearing substantially parallel to the longitudinal central axis of the crankshaft.
  • the invention also provides a two-stroke internal combustion engine having an electric starting device as described above, and a vehicle having a frame and at least one front wheel and at least one rear wheel having the aforementioned two-stroke internal combustion engine.
  • the thus formed two-stroke internal combustion engine for competition motorcycles can - should it be desired - also on a two-lane vehicle, such as an ATV (All Terrain Vehicle) are mounted.
  • the electric starting device according to the invention is now characterized by many advantages over a starter device mounted, for example, in the direction of travel behind the cylinder of the internal combustion engine.
  • the location at which the drive torque is generated for starting the internal combustion engine is closer to the location at which this output torque is then introduced into the crankshaft of the internal combustion engine.
  • the electric starter motor - as is the case in known starting devices - is located behind the cylinder of the internal combustion engine, then the output torque of the electric starter motor must be transmitted to the crankshaft, for example by means of a gear cascade, a chain or a toothed belt or the like. This leads not only to the increased manufacturing costs but also to increased Maintenance of the said chain and / or the belt drive.
  • Such an arrangement also means a collision with the fuel tank of the vehicle and would lead to the fact that the small tank volume of such a fuel tank, which would anyway be low in weight, would be further reduced.
  • a motor housing accommodating an electric starter motor behind the cylinder of the internal combustion engine could be used only in connection with the electric starting device, but not as a motor housing for an engine having only one kickstart device.
  • the electric starting device according to the invention can also be retrofitted to an internal combustion engine and the electric starter motor is located outside the sphere of influence of swirled stones and outside the fall-prone area of the motorcycle.
  • the bevel gear and the thrust screw can be mounted below the ignition cover, so in a ⁇ lbadenfin space, without increasing the overall width of the equipped with the electric starting device according to the invention internal combustion engine.
  • the starter motor is located in the immediate vicinity of the bolted to the crankshaft ignition rotor, so that the output torque of the starter motor does not have to be introduced over a long transmission path in the teeth of the ignition rotor, so that by eliminating this long transmission path and the total weight of the electric starting device according to the invention can be.
  • the electric starting device can be mounted both at the factory, as well as retrofitted as an add-on solution to be delivered without electric starter internal combustion engine, so that a subsequent equipment of the off-road motor with the electric starting device according to the invention is possible.
  • the electric starting device 1 has a starter motor 2, which is provided with a spur gear 2a, which is connected to the non-illustrated Motor shaft of the starter motor 2 is arranged rotatably, with a crown gear 3 meshes.
  • the longitudinal center axis of the motor shaft runs along the direction of the double arrow L.
  • the crown wheel 3 is arranged axially and rotationally fixed to an intermediate shaft 4, wherein the intermediate shaft 4 also has a axially and non-rotatably mounted spur gear 5 with a spur gear toothing 6.
  • This spur gear 6 is in a meshing engagement with a spur gear toothing 7 of a spur gear 8, which is arranged axially and rotationally fixed to a shaft 9 of a thrust screw 10.
  • the thrust screw drive 10 also has a slide-in pinion 11, which can engage with a toothing 12 which is attached to an ignition rotor 13.
  • the position of the starter motor 2 relative to the crown gear 3 of the angle gear 14 is selected such that the longitudinal center axis L of the motor shaft of the starter motor 2 extends in the direction of the spur gear 6 of the spur gear in such a way that both the spur gear 5 and the Spur gear 2a together on one side of a through the crown gear 3 through and the intermediate shaft 4 at right angles intersecting longitudinal center plane.
  • FIG. 2 The drawing now shows in a partially sectioned illustration a single-cylinder two-stroke engine 15 with gear and an electric starting device 1 arranged thereon according to the present invention.
  • the engine 15 is a high-performance single-cylinder two-stroke engine, as it is to be placed on a competitive for example Enduro is provided.
  • the ignition rotor 13 is located in the direction of travel F on the left hand side arranged on a crankshaft of the engine 15, not shown, and is located below an ignition cover 16 which can be screwed to the crankcase 17.
  • the ignition cover 16 also covers the thrust screw spindle 10 and the angle gear 14.
  • the arrangement of the starter motor 2 is chosen so that it is located on the one hand close to the cylinder 18 and on the other hand close to a frame undercarriage 19 of the off-road sport motorcycle not shown.
  • the starter motor 2 can be determined via a support 20 on the frame member 19 or by means of the support 20 which can be bolted to the crankcase 17 and a neck of the crankcase 17, in which case a corresponding connection point on the frame support 19 need not be provided , Such an embodiment is in Fig. 4 the drawing shown.
  • the starter motor 2 has a support 20 integrated on a housing component of the starter motor 2.
  • the starter motor 2 can be set on the drive motor 15 itself via the ignition cover 16.
  • the ignition cover 16 has two threaded holes into which two bolts 23 can be screwed, which set the starter motor 2 on the drive motor 15, since the ignition cover 16 can be fixed by means of bolts 24 on the crankcase 17 of the drive motor 15. In this embodiment, therefore, a corresponding connection point on the frame support 19 is not provided.
  • the drawing further shows that the starter motor 2 is viewed in the direction of travel F of the motorcycle behind an exhaust guide device 21 (two-stroke bulb) arranged so that whirled stones are held by the two-stroke bulb 21 and the starter motor 2 can not hit.
  • the starter motor 2 is also below and within an outer surface 22 of a not illustrated fuel tanks of the motorcycle, so that even in the event of a fall on the left side of the motorcycle, the starter motor 2 does not come into contact with the ground.
  • the thrust screw drive 10 and the angle gear 14 are mounted in dry-running wear-resistant bushings in the crankcase 17 and in the ignition cover 16 and the crown wheel 3 covering cover 26. As a result, compared to a storage in, for example, rolling bearings a less space accommodating storage is achieved.
  • Fig. 5 The drawing now shows that the starter motor 2 and arranged under the lid 26 crown gear 3 can be covered by a cover 25 which can be attached via the bolt 24 on the drive motor 15, which also determines the ignition cover 16 on the crankcase 17 of the Drive motor 15 serve.
  • the inventively provided electric starting device is now characterized by the fact that they can be mounted on an off-road sports bike due to their compact, lightweight and little space-consuming construction, without negatively affecting the overall weight and thus the driving dynamics.
  • the electric starting device on the internal combustion engine of the off-road motorbike can also be mounted so that it can be protected from external influence z. As rockfall, falls, moisture, etc. is protected.
  • the electric starting device can be integrated into existing engine concepts, without any changes to the engine concept being necessary.
  • the starter motor can be mounted on the motorcycle so that the motorcycle itself need not be modified in any way, but only required for the electric start operation attachments, such as a vehicle battery and a Starter button must be added without the removal of the assembled drive motor from the chassis is required or the drive motor must be disassembled.
  • an originally designed for pure Kickstarter tribe engine concept can be modified by a manufacturer's slight modification of a crankcase half in the ignition cover later on the operation with the starting device.
  • the electric starting device does not increase the width of the motorcycle equipped therewith and is lightweight and compact, the motorcycle does not lose competitiveness and the entire drive torque transmission path from the starter motor to the crankshaft of the engine can be mounted below the ignition cover and thus protected from outside damage ,
  • the inventive electrical starting device requires no oil bath and can thus be integrated into the dry ignition space.
  • the thrust screw provided according to the invention allows a complete decoupling of the starting device from the drive motor after the start of the drive motor in contrast to a known solution with a freewheel running in the oil bath, which generates friction in the freewheeling operation.
  • the required ratio of the starter motor speed is slow to start the crankshaft realized without the need for translation-modifying intermediate wheels are necessary.
  • no modifications are necessary for the use of the electric starting device according to the invention, so that it may be provided for operation with the electric starting device, for a mixed operation, ie with the electric starting device and a Kickstarter or for operation only with a kickstarter, so that in this case, the electric starting device can be retrofitted.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Arrangement Of Transmissions (AREA)

Description

Die vorliegende Erfindung betrifft eine elektrische Startvorrichtung einer Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1.The present invention relates to an electric starting device of an internal combustion engine according to the preamble of claim 1.

Brennkraftmaschinen mit elektrischen Startvorrichtungen sind bereits in einer Vielzahl bekannt geworden. Wenn die Brennkraftmaschine bzw. der Antriebsmotor eines einspurigen Fahrzeugs, insbesondere eines Motorrades mit einer elektrischen Startvorrichtung ausgerüstet werden soll, so befindet sich der Startermotor am Antriebsmotor üblicherweise so angeordnet, dass die Längsmittelachse der Motorwelle des Startermotors parallel zur Mittelachse der Kurbelwelle,des Motors verläuft. Der Startermotor kann dabei in Fahrtrichtung des Motorrads betrachtet vor der Kurbelwelle liegen oder auch, wenn er außerhalb des Eingriffsbereiches beispielsweise vom Vorderrad des Motorrads aufgewirbelter Steine oder dergleichen angebracht werden soll, hinterhalb der Kurbelwelle.Internal combustion engines with electric starting devices have already become known in a variety. If the internal combustion engine or the drive motor of a single-track vehicle, in particular a motorcycle to be equipped with an electric starting device, the starter motor is usually arranged on the drive motor so that the longitudinal center axis of the motor shaft of the starter motor is parallel to the central axis of the crankshaft, the engine. The starter motor can be viewed in the direction of travel of the motorcycle in front of the crankshaft or, if it is to be mounted outside the engagement area, for example, by the front wheel of the motorcycle whirled stones or the like, behind the crankshaft.

Bei einer bekannten Startvorrichtung kann der elektrische Startermotor über einen Freilauf die Kurbelwelle in Drehung versetzen, wobei der Freilauf primärantriebsseitig oder auch auf der Zündungsseite des Kurbelgehäuses angebracht sein kann. Über Zahnräder zwischen dem Startermotor und dem Freilauf wird die Übersetzung der hohen Startermotordrehzahlen ins Langsame auf die benötigte Startdrehzahl der Kurbelwelle realisiert. Der Freilauf läuft dabei üblicherweise im Ölbad, weshalb sich eine derartige Anordnung normalerweise bei Viertaktmotoren wiederfindet.In a known starting device, the electric starter motor can put the crankshaft in rotation via a freewheel, wherein the freewheel can be mounted on the primary drive side or also on the ignition side of the crankcase. About gears between the starter motor and the freewheel, the translation of the high starter engine speeds to slow to the required starting speed of the crankshaft is realized. The freewheel usually runs in an oil bath, which is why such an arrangement is usually found in four-stroke engines.

Es sind aber auch bereits elektrische Startvorrichtungen für Brennkraftmaschinen bekannt geworden, bei denen der elektrische Startermotor über ein Winkelgetriebe unter Zwischenschaltung eines Schubschraubtriebs mit einer Verzahnung zur Beaufschlagung der Kurbelwelle der Brennkraftmaschine in Eingriff gebracht werden kann. Bei einer solchen Anordnung kann aufgrund des Winkelgetriebes die Motorwelle des Startermotors auch in einer von der parallelen Ausrichtung zur Mittelachse der Kurbelwelle abweichenden Einbausituation angebracht werden, beispielsweise in etwa rechtwinklig zur Kurbelwellenachse.But there are already known electrical starting devices for internal combustion engines, in which the electric starter motor can be brought via an angle gearbox with the interposition of a thrust screwdriver with a toothing for acting on the crankshaft of the internal combustion engine in engagement. In such an arrangement, the motor shaft of the starter motor can be mounted in a deviating from the parallel alignment to the central axis of the crankshaft installation situation due to the angular gear, for example, approximately at right angles to the crankshaft axis.

Bei solchen Anordnungen ist an der Motorwelle des elektrischen Startermotors üblicherweise eine Schneckenspindel angeordnet, welche mit einem Schneckenrad kämmt, wobei über das Schneckenrad die Kurbelwelle der Brennkraftmaschine in Drehung versetzt werden kann. Bei einer solchen Anordnung ist eine exakte Ausrichtung der Schneckenspindel zum Schneckenrad erforderlich und zwar sowohl bezüglich Achsversatz als auch Winkelversatz. Eine solche Anordnung ist beispielsweise anhand der DE 197 12 968 A1 bekannt geworden, die eine Hubkolben-Brennkraftmaschine mit einer Schneckengetriebe-Anlassvorrichtung beschreibt, die über einen Freilauf mit der Kurbelwelle der Brennkraftmaschine in Verbindung steht und eine mit dem elektrischen Startermotor verbundene Schneckenspindel beschreibt, die mit dem Schneckenrad kämmt. Ein solches Schneckengetriebe weist darüber hinaus einen schlechten Wirkungsgrad auf und benötigt einen großen und damit schweren Startermotor. Auch kann die Selbsthemmung des Schneckengetriebes ein Problem sein, nämlich dann, wenn der Antriebsmotor nicht startet, sondern zurück schlägt, wie dies bei großvolumigen Einzylindermotoren der Fall sein kann.In such arrangements, a worm screw is usually arranged on the motor shaft of the electric starter motor, which meshes with a worm wheel, wherein the crankshaft of the internal combustion engine can be set in rotation via the worm wheel. In such an arrangement, an exact alignment of the screw to the worm wheel is required, both in terms of axial offset and angular offset. Such an arrangement is for example based on the DE 197 12 968 A1 become known, which describes a reciprocating internal combustion engine with a worm gear-cranking device, which communicates via a freewheel with the crankshaft of the internal combustion engine and describes a connected to the electric starter motor screw, which meshes with the worm wheel. Such a worm gear has In addition, a poor efficiency and requires a large and therefore heavy starter motor. Also, the self-locking of the worm gear can be a problem, namely, when the drive motor does not start, but beats back, as may be the case with large-volume single-cylinder engines.

Anhand der GB 782,140 A1 ist eine elektrische Startvorrichtung für einen Motorroller bekannt geworden, bei der eine Schneckenspindel wieder mit einem Schneckenrad kämmt, wobei das Schneckenrad eine Welle antreibt, die über eine Stirnverzahnung mit einer weiteren Welle im Eingriff steht, an deren abseitigem Ende ein Winkelgetriebe angeordnet ist, welches wiederum die Kurbelwelle des Antriebsmotors des Motorrollers in Drehung versetzen kann. Bei dieser Anordnung ist daher einerseits ein Schneckengetriebe vorgesehen und andererseits auch ein Winkelgetriebe in der Form einer Kegelradverzahnung, sodass neben der richtigen Ausrichtung des Schneckengetriebes auch eine entsprechend aufwendige und richtige Lagerung des Kegelgetriebes erforderlich ist, sodass ein großer konstruktiver und Kostenaufwand zur Implementierung dieser bekannten elektrischen Startvorrichtung betrieben werden muss.Based on GB 782,140 A1 an electric starting device for a scooter has become known, in which a worm gear meshes again with a worm wheel, wherein the worm wheel drives a shaft which is engaged via a spur gear with another shaft, at whose abseitigen end an angle gear is arranged, which in turn the crankshaft of the drive motor of the scooter can set in rotation. In this arrangement, therefore, on the one hand, a worm gear is provided and on the other hand, an angular gear in the form of bevel gear, so that in addition to the correct orientation of the worm gear and a correspondingly complex and correct storage of the bevel gear is required, so a great constructive and cost to implement this known electrical Starting device must be operated.

Schließlich ist anhand der DE-PS 1 912 228 bereits eine elektrische Startvorrichtung mit einem Winkelgetriebe bekannt geworden, bei der der elektrische Startermotor über ein Winkelgetriebe unter Zwischenschaltung eines Schubschraubtriebs mit einer Verzahnung zur Beaufschlagung einer Kurbelwelle der Brennkraftmaschine in Eingriff gebracht werden kann und somit die Brennkraftmaschine elektrisch gestartet werden kann. Bei dieser bekannten elektrischen Startvorrichtung befindet sich die Verzahnung für ein Abtriebsritzel des Schubschraubtriebs an einer außenliegenden Schwungscheibe der Kurbelwelle angebracht, wobei es sich bei dieser Brennkraftmaschine um einen Rasenmähermotor handelt. Die Motorwelle des elektrischen Startermotors verläuft dabei im rechten Winkel zur Achse der Kurbelwelle, wobei die Abtriebswelle dieses elektrischen Startermotors direkt auf die Welle des Schubschraubtriebs wirkt. Auch erfordert der direkte Antrieb des Schubschraubtriebs über den elektrischen Startermotor eine Verzahnung mit großem Durchmesser, die im vorliegenden Fall an der Schwungscheibe angebracht ist, was wiederum zu einem hohen Rotationsträgheitsmoment führt, das bei Geländesportwettbewerbsmotorrädern unerwünscht ist.Finally, based on the DE-PS 1 912 228 already become known an electric starting device with an angle gear, in which the electric starter motor can be brought via an angle gearbox with the interposition of a screwdriver with a toothing for acting on a crankshaft of the internal combustion engine engaged and thus the internal combustion engine can be started electrically. In this known electric starting device, the toothing for an output pinion of the thrust screw drive is mounted on an external flywheel of the crankshaft, wherein this engine is a lawnmower engine. The motor shaft of the electric starter motor runs at right angles to the axis of the crankshaft, the output shaft of this electric starter motor directly to the shaft of the thrust screw drive acts. Also, the direct drive of the thrust screwdriver via the electric starter motor requires a large diameter gearing, which in this case is mounted on the flywheel, which in turn results in a high rotational moment of inertia, which is undesirable in off-highway sport motorcycles.

Wenn nun eine Brennkraftmaschine zum Antrieb eines Geländesportmotorrades, welches für Wettbewerbszwecke vorgesehen ist, eingesetzt wird, so besteht ein wesentliches Kriterium darin, das Gesamtgewicht dieses Motorrades und damit das Gesamtgewicht der Brennkraftmaschine niedrig zu halten. Daher besitzen solche Brennkraftmaschinen oder Antriebsmotoren von wettbewerbstauglichen Geländesportmotorrädern üblicherweise keine elektrische Startvorrichtung, da diese das Gesamtgewicht des Fahrzeugs deutlich steigert. Die hier eingesetzten Antriebsmotoren werden daher üblicherweise mittels eines Kickstarters gestartet, was bei körperlich anstrengenden Geländesportwettbewerben den Fahrer eines solchen Geländesportmotorrads zusätzlich körperlich erheblich belasten kann, da es durchaus vorkommt, dass ein beispielsweise unbeabsichtigt abgestorbener Antriebsmotor vom erschöpften und unkonzentrierten Fahrer nicht beim ersten Startversuch mit dem Kickstarter wieder gestartet werden kann. Ein solcher Stillstand des Fahrzeugs kann dabei zu einem Zeitverlust beim Wettbewerb führen.Now, if an internal combustion engine for driving a terrain sport motorcycle, which is intended for competition purposes, is used, so there is an essential criterion is to keep the overall weight of this motorcycle and thus the total weight of the engine low. Therefore, such internal combustion engines or drive motors of competitive off-road motorcycles usually have no electric starting device, since this significantly increases the total weight of the vehicle. The drive motors used here are therefore usually started by means of a kick starter, which can also physically burden the driver of such a terrain sports motorcycle in physically strenuous off-road competitions, since it is quite possible that, for example, unintentionally dead drive engine exhausted and unfocused driver not at the first start attempt with the Kickstarter can be restarted. Such a stoppage of the vehicle can lead to a loss of time in the competition.

Ausgehend hiervon liegt der vorliegenden Erfindung nunmehr die Aufgabe zugrunde, eine elektrische Startvorrichtung einer Brennkraftmaschine zu schaffen, die kompakt und leicht aufgebaut ist und darüber hinaus an einer bestehenden Brennkraftmaschine angebracht werden kann, sei dies nun werkseitig oder auch zur nachträglichen Anordnung an der Brennkraftmaschine als add-on-Bauteil, sodass es auch möglich ist, ein mit einer solchen Brennkraftmaschine ausgestattetes Motorrad nachträglich mit einer elektrischen Startvorrichtung zu versehen. Auch soll nach der Erfindung eine Zweitaktbrennkraftmaschine mit einer elektrischen Startvorrichtung geschaffen werden und ein mit einer solchen Zweitaktbrennkraftmaschine ausgestattetes Motorrad.Based on this, the present invention, the object of the invention to provide an electric starting device of an internal combustion engine, which is compact and lightweight and can also be attached to an existing internal combustion engine, be it factory or even for subsequent arrangement on the engine as add -on-component, so that it is also possible to provide a motor equipped with such an engine later with an electric starter. Also to be created according to the invention, a two-stroke internal combustion engine with an electric starter and a motorcycle equipped with such a two-stroke internal combustion engine.

Die Erfindung schafft nun zur Lösung dieser Aufgabe eine elektrische Startvorrichtung mit den Merkmalen des Anspruchs 1, wobei vorteilhafte Ausgestaltungen hiervon in den weiteren Ansprüchen beschrieben sind. Auch schafft die Erfindung eine Zweitaktbrennkraftmaschine nach Anspruch 9 sowie ein Motorrad nach Anspruch 10.The invention now provides for solving this problem, an electric starting device with the features of claim 1, wherein advantageous embodiments thereof are described in the further claims. The invention also provides a two-stroke internal combustion engine according to claim 9 and a motorcycle according to claim 10.

Die Erfindung schafft nun eine elektrische Startvorrichtung einer Brennkraftmaschine, mit einem Startermotor, der über ein Winkelgetriebe unter Zwischenschaltung eines Schubschraubtriebs mit einer Verzahnung auf einem Zündungsrotor zur Beaufschlagung einer Kurbelwelle der Brennkraftmaschine in Eingriff bringbar ist und die Motorwelle des Startermotors weitgehend rechtwinklig zur Kurbelwellenachse angeordnet ist, wobei das Winkelgetriebe ein Kronenrad und ein Stirnrad besitzt, die drehfest an einer Zwischenwelle angeordnet sind und das Stirnrad mit einem Stirnrad des Schubschraubtriebs kämmt.The invention now provides an electric starting device of an internal combustion engine, with a starter motor, which is engageable via an angle gearbox with the interposition of a thrust screw drive with a toothing on a firing rotor for acting on a crankshaft of the internal combustion engine and the motor shaft of the starter motor is arranged substantially perpendicular to the crankshaft axis, wherein the angular gear has a crown gear and a spur gear, which are arranged non-rotatably on an intermediate shaft and the spur gear meshes with a spur gear of the thrust screw drive.

Damit steht der elektrische Startermotor bzw. die Motorwelle des elektrischen Startermotors nicht direkt mit dem Schubschraubtrieb in Eingriff sondern unter Zwischenschaltung des ein Kronenrad und ein Stirnrad aufweisenden Winkelgetriebes, was einerseits eine motornahe Montage des Startermotors ermöglicht, also eng benachbart zu einem Zylinder des Motors und/oder zu Rahmenbauteilen des Rahmens des Motorrads und darüber hinaus auch eine einfache nachträgliche Montage der elektrischen Startvorrichtung ermöglicht, da das Kronenrad eine axiale Freiheit des Stirnrads des elektrischen Startermotors ermöglicht und damit eine einfache nachträgliche Anbringbarkeit, da die Genauigkeit bei der Montage und der axialen Ausrichtung der Motorwelle des elektrischen Startermotors relativ zum Kronenrad niedriger ist, als die Anforderungen bezüglich der Montagegenauigkeit bei einem ein Kegelrad aufweisenden Winkelgetriebe. Auch kann dadurch eine elektrische Startvorrichtung mit nur wenig Eigengewicht implementiert werden, d. h. also dem gewünschten Leichtbau Rechnung getragen werden, da aufgrund des Kronenrads auch bei betriebsbedingten Verformungen während des Betriebs der elektrischen Startvorrichtung das Tragbild zwischen dem Stirnrad der Motorwelle und dem Kronenrad bei unterschiedlichen Lasten wenig beeinflusst wird. Das Kronenrad kann beispielsweise mittels eines Kaltpressvorgangs fertig bearbeitet werden und ist daher im Gegensatz zu einer Kegelradverzahnung kostengünstig herzustellen und zu montieren und erlaubt größere Montage- und Fertigungstoleranzen.Thus, the electric starter motor or the motor shaft of the electric starter motor is not directly with the thrust screw engaged but with the interposition of a crown gear and a spur gear having angular gear, which on the one hand allows close-to-motor mounting of the starter motor, ie closely adjacent to a cylinder of the engine and / or to frame components of the frame of the motorcycle and beyond also a simple retrofitting of the electric starting device allows, as the crown wheel allows axial freedom of the spur gear of the electric starter motor and thus easy subsequent attachability, since the accuracy of the assembly and the axial alignment of Motor shaft of the electric starter motor relative to the crown wheel is lower than the requirements for mounting accuracy in a bevel gear having bevel gear. Also, by an electric starting device with only low dead weight be implemented, ie the desired lightweight construction be taken into account, since due to the crown wheel even with operational deformations during operation of the electric starting device, the contact pattern between the spur gear of the motor shaft and the crown wheel is little affected at different loads. The crown wheel can be finished, for example, by means of a cold press process and therefore, in contrast to a bevel gear toothing inexpensive to manufacture and assemble and allows greater assembly and manufacturing tolerances.

Die Anordnung des Startermotors ist dabei so, dass eine Längsmittelachse der Motorwelle in Richtung zur Stirnradverzahnung des Stirnrads des Winkelgetriebes ausgerichtet verläuft derart, dass sich die Längsmittelachse und die Stirnradverzahnung auf einer Seite einer Längsmittelebene des Kronenrades angeordnet befinden, sodass eine wenig Bauraumbreite beanspruchende elektrische Startvorrichtung möglich ist, bei der der Startermotor zylindernah und rahmennah montiert werden kann und somit auch außerhalb des Einflussbereichs von beispielsweise vom Vorderrad des Motorrads aufgewirbelter Steine.The arrangement of the starter motor is such that a longitudinal center axis of the motor shaft aligned in the direction of the spur gear teeth of the helical gear extends such that the longitudinal center axis and the spur gear teeth are arranged on one side of a longitudinal center plane of the crown wheel, so that a little space width consuming electric starting device possible is, in which the starter motor close to the cylinder and can be mounted close to the frame and thus outside the sphere of influence, for example, from the front wheel of the motorcycle whirled stones.

Es ist dabei nach der Erfindung vorgesehen, dass das Winkelgetriebe und der Schubschraubtrieb zwischen einem Kurbelgehäuse der Brennkraftmaschine und einem den Zündungsrotor abdeckenden Verschlussdeckel, der am Kurbelgehäuse festlegbar ist, angeordnet sind. Mit dieser Anordnung wird es erreicht, dass das Winkelgetriebe und der Schubschraubtrieb unterhalb des den Zündungsrotor abdeckenden Verschlussdeckels, der auch als Zündungsdeckel bezeichnet wird, montiert werden können und somit außerhalb des Einflussbereichs der vorstehend erwähnten vom Vorderrad aufgewirbelten Steine liegen. Zudem bietet diese Ausgestaltung den Vorteil, dass an der Konstruktion der Brennkraftmaschine keine Modifikationen notwendig sind, also die Brennkraftmaschine einerseits als reine Kickstarterlösung möglich ist, als Brennkraftmaschine möglich ist, mit nur einer elektrischen Startvorrichtung oder auch als Brennkraftmaschine mit sowohl einer elektrischen Startvorrichtung als auch einem Kickstarter.It is provided according to the invention that the angular gear and the thrust screw drive between a crankcase of the internal combustion engine and a Zündungsrotor covering cap, which is fixed to the crankcase, are arranged. With this arrangement, it is achieved that the bevel gear and the thrust screw driver can be mounted below the shutter cover covering the ignition rotor, which is also referred to as the ignition cover, and hence out of the range of influence of the above-mentioned stones stirred by the front wheel. In addition, this embodiment has the advantage that no modifications to the construction of the internal combustion engine are necessary, so that the internal combustion engine on the one hand as a pure Kickstarter solution is possible, as an internal combustion engine is possible with only one electric starter or as an internal combustion engine with both an electric starter and a kickstarter.

Der Startermotor befindet sich dabei außerhalb des Verschlussdeckels angeordnet und kann mittels einer Abstützung an einem Rahmenbauteil des einspurigen Fahrzeugs, bei dem es sich beispielsweise um ein wettbewerbstaugliches Geländesportmotorrad handeln kann, festgelegt werden. Bei dem Rahmenbauteil kann es sich beispielsweise um einen Rahmenunterzug handeln, der werkseitig mit einem Gewindeansatz oder dergleichen versehen ist, an dem der elektrische Startermotor mittels der Abstützung verschraubt werden kann, bei der Abstützung kann es sich um eine nur einen Träger aufweisende Abstützung handeln oder auch um eine zwei Stützträger aufweisende Abstützung, sodass beispielsweise der elektrische Startermotor am Rahmenunterzug mittels einer V-förmigen Abstützung festgelegt werden kann.The starter motor is located outside of the closure cap and can be fixed by means of a support on a frame member of the single-track vehicle, which may be, for example, a competition-competitive off-road motorbike. The frame component can be, for example, a frame support which is provided at the factory with a threaded projection or the like, to which the electric starter motor can be screwed by means of the support, the support may be a support having only a support or else about a two support beam having support, so that, for example, the electric starter motor can be fixed to the frame under cover by means of a V-shaped support.

Eine solche Abstützung kann auch am Startermotor selbst vorgesehen sein, beispielsweise an einem Gehäusebauteil des Startermotors integriert. Über diese Abstützung kann der Startermotor dann am Antriebsmotor selbst festgelegt werden. Zu diesem Zweck kann der Startermotor beispielsweise am Zündungsdeckel mittels Gewindebolzen festgelegt werden. Der Zündungsdeckel wiederum kann am Kurbelgehäuse des Antriebsmotors festgelegt werden, so dass damit der Startermotor am Antriebsmotor befestigt ist.Such a support can also be provided on the starter motor itself, for example integrated on a housing component of the starter motor. About this support the starter motor can then be set on the drive motor itself. For this purpose, the starter motor can be set, for example, on the ignition cover by means of threaded bolts. The ignition cover in turn can be fixed to the crankcase of the drive motor, so that so that the starter motor is attached to the drive motor.

Die Anordnung des Startermotors am Rahmenbauteil oder am Antriebsmotor ist dabei derart gewählt, dass er in Fahrtrichtung des einspurigen Fahrzeugs betrachtet hinter einem Verbrennungsgasführungsbauteil und unterhalb sowie innerhalb einer Außenfläche eines Kraftstofftanks des einspurigen Fahrzeugs angeordnet ist.The arrangement of the starter motor on the frame component or on the drive motor is chosen such that it is viewed in the direction of travel of the single-track vehicle behind a combustion gas guide member and below and within an outer surface of a fuel tank of the single-track vehicle.

Es bedeutet dies mit anderen Worten, dass der elektrische Startermotor so nahe am Zylinder liegend am Rahmenbauteil oder am Antriebsmotor festgelegt wird, dass er in Fahrtrichtung betrachtet hinterhalb eines Abgaskrümmers, bei dem es sich bei einer Zweitaktbrennkraftmaschine um eine sogenannte Zweitaktbirne handeln kann, angeordnet ist, von der er gegen vom Vorderrad des Motorrads aufgewirbelte Steine geschützt ist und auch unterhalb und innerhalb einer Außenfläche des Kraftstofftanks des Motorrads, sodass der elektrische Startermotor auch bei einem Sturz des Geländesportmotorrads nicht mit dem Boden in Kontakt kommt.In other words, this means that the electric starter motor is set as close to the cylinder on the frame member or on the drive motor, that he in Direction seen behind an exhaust manifold, which may be in a two-stroke engine is a so-called two-stroke bulb is arranged, from which it is protected against the front wheel of the motorcycle stones and also underneath and inside an outer surface of the fuel tank of the motorcycle, so that the electric Starter motor does not come into contact with the ground even in a fall of the off-road sport motorcycle.

Die Anordnung des Schubschraubtriebs ist dabei so gewählt, dass eine Längsmittelachse einer, ein Einschubritzel des Schubschraubtriebs tragenden Welle weitgehend parallel zur Längsmittelachse der Kurbelwelle verläuft. Schließlich schafft die Erfindung auch eine Zweitaktbrennkraftmaschine mit einer elektrischen Startvorrichtung, wie sie vorstehend beschrieben worden ist, und Fahrzeug mit einem Rahmen und mindestens einem Vorderrad sowie mindestens einem Hinterrad, welches die vorstehend genannte Zweitaktbrennkraftmaschine besitzt. Die so ausgebildete Zweitaktbrennkraftmaschine für Wettbewerbsmotorräder kann dabei - sollte es gewünscht sein - auch an einem zweispurigen Fahrzeug, beispielsweise einem ATV (All Terrain Vehicle) angebracht werden.The arrangement of the thrust screw drive is chosen so that a longitudinal central axis of a, a plug-in pinion of the thrust screw shaft bearing substantially parallel to the longitudinal central axis of the crankshaft. Finally, the invention also provides a two-stroke internal combustion engine having an electric starting device as described above, and a vehicle having a frame and at least one front wheel and at least one rear wheel having the aforementioned two-stroke internal combustion engine. The thus formed two-stroke internal combustion engine for competition motorcycles can - should it be desired - also on a two-lane vehicle, such as an ATV (All Terrain Vehicle) are mounted.

Die erfindungsgemäße elektrische Startvorrichtung zeichnet sich nun gegenüber einem beispielsweise in Fahrtrichtung betrachtet hinterhalb des Zylinders der Brennkraftmaschine angebrachten Startvorrichtung durch viele Vorteile aus. Der Ort, an dem das Antriebsmoment zum Starten der Brennkraftmaschine erzeugt wird, befindet sich näher an dem Ort, an dem dieses dann Abtriebsmoment in die Kurbelwelle der Brennkraftmaschine eingeleitet wird. Befindet sich nämlich der elektrische Startermotor - wie dies bei bekannten Startvorrichtungen der Fall ist - in Fahrtrichtung betrachtet hinterhalb des Zylinders der Brennkraftmaschine, so muss das Abtriebsmoment des elektrischen Startermotors beispielsweise mittels einer Zahnradkaskade, einer Kette oder einem Zahnriemen oder dergleichen auf die Kurbelwelle übertragen werden. Dies führt neben den damit erhöhten Herstellkosten auch zu erhöhtem Wartungsaufwand bezüglich der genannten Kette und/oder dem Zahnriemenantrieb. Auch bedeutet eine solche Anordnung eine Kollision mit dem Kraftstofftank des Fahrzeugs und würde dazu führen, dass das ohnehin - zur Gewichtseinsparung - geringe Tankvolumen eines solchen Kraftstofftanks weiter verringert werden würde. Aufgrund des längeren Momentenübertragungswegs zwischen dem elektrischen Startermotor und der Kurbelwelle bei einem hinterhalb des Zylinders angebrachten Startermotor ist ein aufwendiges und komplexes Motorgehäuse erforderlich, was wiederum mit der Absicht kollidiert, ein bestehendes Motorkonzept nachträglich mit einer elektrischen Startvorrichtung versehen zu können. Auch könnte ein solches, einen elektrischen Startermotor hinterhalb des Zylinders der Brennkraftmaschine aufnehmendes Motorgehäuse nur in Verbindung mit der elektrischen Startvorrichtung benutzt werden, nicht aber als Motorgehäuse für einen Motor mit nur einer Kickstartvorrichtung.The electric starting device according to the invention is now characterized by many advantages over a starter device mounted, for example, in the direction of travel behind the cylinder of the internal combustion engine. The location at which the drive torque is generated for starting the internal combustion engine is closer to the location at which this output torque is then introduced into the crankshaft of the internal combustion engine. If, in fact, the electric starter motor - as is the case in known starting devices - is located behind the cylinder of the internal combustion engine, then the output torque of the electric starter motor must be transmitted to the crankshaft, for example by means of a gear cascade, a chain or a toothed belt or the like. This leads not only to the increased manufacturing costs but also to increased Maintenance of the said chain and / or the belt drive. Such an arrangement also means a collision with the fuel tank of the vehicle and would lead to the fact that the small tank volume of such a fuel tank, which would anyway be low in weight, would be further reduced. Due to the longer torque transmission path between the electric starter motor and the crankshaft at a mounted behind the cylinder starter motor a complex and complex engine housing is required, which in turn collides with the intention to provide an existing engine concept later with an electric starter. Also, such a motor housing accommodating an electric starter motor behind the cylinder of the internal combustion engine could be used only in connection with the electric starting device, but not as a motor housing for an engine having only one kickstart device.

All die vorstehend geschilderten Nachteile werden nun durch die erfindungsgemäße elektrische Startvorrichtung beseitigt. Die erfindungsgemäße elektrische Startvorrichtung kann an einer Brennkraftmaschine auch nachträglich angebracht werden und der elektrische Startermotor befindet sich außerhalb des Einflussbereiches von aufgewirbelten Steinen und außerhalb des sturzgefährdeten Bereiches des Motorrads. Darüber hinaus können das Winkelgetriebe und der Schubschraubtrieb unterhalb des Zündungsdeckels angebracht werden, also in einem ölbadfreien Raum, ohne die gesamte Baubreite der mit der elektrischen Startvorrichtung nach der Erfindung ausgestatteten Brennkraftmaschine ansteigen zu lassen.All the above-described disadvantages are now eliminated by the electric starting device according to the invention. The electric starting device according to the invention can also be retrofitted to an internal combustion engine and the electric starter motor is located outside the sphere of influence of swirled stones and outside the fall-prone area of the motorcycle. In addition, the bevel gear and the thrust screw can be mounted below the ignition cover, so in a Ölbadfreien space, without increasing the overall width of the equipped with the electric starting device according to the invention internal combustion engine.

Der Startermotor befindet sich in unmittelbarer Nähe des mit der Kurbelwelle verschraubten Zündungsrotors, sodass das Abtriebsmoment des Startermotors nicht über einen langen Übertragungsweg in die Verzahnung des Zündungsrotors eingebracht werden muss, sodass durch den Wegfall dieser langen Übertragungsstrecke auch das Gesamtgewicht der elektrischen Startvorrichtung nach der Erfindung verringert werden kann. Die elektrische Startvorrichtung kann sowohl werkseitig montiert werden, als auch nachträglich als add-on-Lösung an ohne elektrische Startvorrichtung ausgelieferten Brennkraftmaschinen angebracht werden, sodass auch eine nachträgliche Ausstattung des Geländesportmotorsrads mit der erfindungsgemäßen elektrischen Startvorrichtung möglich ist.The starter motor is located in the immediate vicinity of the bolted to the crankshaft ignition rotor, so that the output torque of the starter motor does not have to be introduced over a long transmission path in the teeth of the ignition rotor, so that by eliminating this long transmission path and the total weight of the electric starting device according to the invention can be. The electric starting device can be mounted both at the factory, as well as retrofitted as an add-on solution to be delivered without electric starter internal combustion engine, so that a subsequent equipment of the off-road motor with the electric starting device according to the invention is possible.

Die Erfindung wir nun im Folgenden anhand der Zeichnung näher erläutert. Diese zeigt in:

  • Fig. 1 eine perspektivische Darstellung einer Ausführungsform einer elektrischen Startvorrichtung nach der vorliegenden Erfindung;
  • Fig. 2 eine perspektivische und teilweise geschnittene Darstellung einer Brennkraftmaschine mit daran angeordneter elektrischer Startvorrichtung;
  • Fig. 3 eine perspektivische Darstellung einer in einem Motorradrahmen eingesetzten Brennkraftmaschine mit elektrischer Startvorrichtung;
  • Fig. 4 eine perspektivische Darstellung einer Brennkraftmaschine mit einer zweiten Ausführungsform der elektrischen Startvorrichtung; und
  • Fig. 5 eine Darstellung ähnlich Fig. 4, die eine Abdeckung an der elektrischen Startvorrichtung zeigt.
  • Fig. 1 der Zeichnung zeigt in einer perspektivischen Darstellung eine Ausführungsform einer elektrischen Startvorrichtung 1 nach der vorliegenden Erfindung.
The invention will now be explained in more detail below with reference to the drawing. This shows in:
  • Fig. 1 a perspective view of an embodiment of an electric starting device according to the present invention;
  • Fig. 2 a perspective and partially sectioned view of an internal combustion engine with arranged thereon electric starting device;
  • Fig. 3 a perspective view of an internal combustion engine used in a motorcycle frame with electric starting device;
  • Fig. 4 a perspective view of an internal combustion engine with a second embodiment of the electric starting device; and
  • Fig. 5 a representation similar Fig. 4 showing a cover on the electric starting device.
  • Fig. 1 The drawing shows a perspective view of an embodiment of an electric starting device 1 according to the present invention.

Wie es ohne weiteres ersichtlich ist, weist die elektrische Startvorrichtung 1 einen Startermotor 2 auf, der mit einem Stirnrad 2a, welches an der nicht näher dargestellten Motorwelle des Startermotors 2 drehfest angeordnet ist, mit einem Kronenrad 3 kämmt. Die Längsmittelachse der Motorwelle verläuft dabei entlang der Richtung des Doppelpfeiles L.As can be readily seen, the electric starting device 1 has a starter motor 2, which is provided with a spur gear 2a, which is connected to the non-illustrated Motor shaft of the starter motor 2 is arranged rotatably, with a crown gear 3 meshes. The longitudinal center axis of the motor shaft runs along the direction of the double arrow L.

Das Kronenrad 3 befindet sich dabei an einer Zwischenwelle 4 axial- und drehfest angeordnet, wobei die Zwischenwelle 4 auch ein daran axial- und drehfest angeordnetes Stirnrad 5 mit einer Stirnradverzahnung 6 aufweist.The crown wheel 3 is arranged axially and rotationally fixed to an intermediate shaft 4, wherein the intermediate shaft 4 also has a axially and non-rotatably mounted spur gear 5 with a spur gear toothing 6.

Diese Stirnradverzahnung 6 befindet sich in einem kämmenden Eingriff mit einer Stirnradverzahnung 7 eines Stirnrades 8, welches an einer Welle 9 eines Schubschraubtriebs 10 axial und drehfest angeordnet ist. Der Schubschraubtrieb 10 weist darüber hinaus ein Einschubritzel 11 auf, welches mit einer Verzahnung 12, die an einem Zündungsrotor 13 angebracht ist, in Eingriff kommen kann.This spur gear 6 is in a meshing engagement with a spur gear toothing 7 of a spur gear 8, which is arranged axially and rotationally fixed to a shaft 9 of a thrust screw 10. The thrust screw drive 10 also has a slide-in pinion 11, which can engage with a toothing 12 which is attached to an ignition rotor 13.

Wie es Fig. 1 der Zeichnung zeigt, ist die Lage des Startermotors 2 relativ zum Kronenrad 3 des Winkelgetriebes 14 derart gewählt, dass die Längsmittelachse L der Motorwelle des Startermotors 2 in Richtung zur Stirnradverzahnung 6 des Stirnrades verläuft und zwar derart, dass sich sowohl das Stirnrad 5 als auch das Stirnrad 2a gemeinsam auf einer Seite einer durch das Kronenrad 3 hindurch gelegten und die Zwischenwelle 4 rechtwinklig schneidenden Längsmittelebene befinden. Durch diese Anordnung wird eine kompakte und platzsparende Konfiguration der erfindungsgemäßen elektrischen Startvorrichtung 1 erreicht.Like it Fig. 1 The drawing shows, the position of the starter motor 2 relative to the crown gear 3 of the angle gear 14 is selected such that the longitudinal center axis L of the motor shaft of the starter motor 2 extends in the direction of the spur gear 6 of the spur gear in such a way that both the spur gear 5 and the Spur gear 2a together on one side of a through the crown gear 3 through and the intermediate shaft 4 at right angles intersecting longitudinal center plane. By this arrangement, a compact and space-saving configuration of the electric starting device 1 according to the invention is achieved.

Fig. 2 der Zeichnung zeigt nun in einer teilweise geschnittenen Darstellung einen Einzylinder-Zweitaktmotor 15 mit Getriebe und einer daran angeordneten elektrischen Startvorrichtung 1 nach der vorliegenden Erfindung. Fig. 2 The drawing now shows in a partially sectioned illustration a single-cylinder two-stroke engine 15 with gear and an electric starting device 1 arranged thereon according to the present invention.

Bei dem Motor 15 handelt es sich um einen hochleistungsfähigen Einzylinder-Zweitaktmotor, wie er zur Anordnung beispielsweise an einer wettbewerbstauglichen Enduro vorgesehen ist. Wie es ohne weiteres ersichtlich ist, befindet sich der Zündungsrotor 13 in Fahrtrichtung F betrachtet linksseitig an einer nicht näher dargestellten Kurbelwelle des Motors 15 angeordnet und liegt unterhalb eines Zündungsdeckels 16, der mit dem Kurbelgehäuse 17 verschraubt werden kann.The engine 15 is a high-performance single-cylinder two-stroke engine, as it is to be placed on a competitive for example Enduro is provided. As can be readily seen, the ignition rotor 13 is located in the direction of travel F on the left hand side arranged on a crankshaft of the engine 15, not shown, and is located below an ignition cover 16 which can be screwed to the crankcase 17.

Der Zündungsdeckel 16 deckt auch die Schubschraubspindel 10 und das Winkelgetriebe 14 ab. Wie Fig. 2 und insbesondere 3 der Zeichnung ohne weiteres zeigen, ist die Anordnung des Startermotors 2 so gewählt, dass er einerseits nahe am Zylinder 18 und andererseits nahe an einem Rahmenunterzug 19 des nicht näher dargestellten Geländesportmotorrads angeordnet ist. Der Startermotor 2 kann dabei über eine Abstützung 20 am Rahmenbauteil 19 festgelegt werden oder auch mittels der Abstützung 20, die am Kurbelgehäuse 17 bzw. einem Ansatz des Kurbelgehäuses 17 verschraubt werden kann, wobei in diesem Fall ein entsprechender Anbindungspunkt am Rahmenunterzug 19 nicht vorgesehen sein muss. Eine solche Ausführungsform ist in Fig. 4 der Zeichnung dargestellt. Hier weist der Startermotor 2 eine an einem Gehäusebauteil des Startermotors 2 integrierte Abstützung 20 auf. Über diese Abstützung 20 kann der Startermotor 2 am Antriebsmotor 15 selbst festgelegt werden und zwar über den Zündungsdeckel 16. Zu diesem Zweck besitzt der Zündungsdeckel 16 zwei Gewindebohrungen, in die zwei Schraubbolzen 23 eingeschraubt werden können, die so den Startermotor 2 am Antriebsmotor 15 festlegen, da der Zündungsdeckel 16 über Schraubbolzen 24 am Kurbelgehäuse 17 des Antriebsmotors 15 festgelegt werden kann. Bei dieser Ausführungsform ist also ein entsprechender Anbindungspunkt am Rahmenunterzug 19 nicht vorgesehen.The ignition cover 16 also covers the thrust screw spindle 10 and the angle gear 14. As Fig. 2 and 3 in particular of the drawing readily show, the arrangement of the starter motor 2 is chosen so that it is located on the one hand close to the cylinder 18 and on the other hand close to a frame undercarriage 19 of the off-road sport motorcycle not shown. The starter motor 2 can be determined via a support 20 on the frame member 19 or by means of the support 20 which can be bolted to the crankcase 17 and a neck of the crankcase 17, in which case a corresponding connection point on the frame support 19 need not be provided , Such an embodiment is in Fig. 4 the drawing shown. Here, the starter motor 2 has a support 20 integrated on a housing component of the starter motor 2. About this support 20, the starter motor 2 can be set on the drive motor 15 itself via the ignition cover 16. For this purpose, the ignition cover 16 has two threaded holes into which two bolts 23 can be screwed, which set the starter motor 2 on the drive motor 15, since the ignition cover 16 can be fixed by means of bolts 24 on the crankcase 17 of the drive motor 15. In this embodiment, therefore, a corresponding connection point on the frame support 19 is not provided.

Wie Fig. 3 der Zeichnung weiter zeigt, befindet sich der Startermotor 2 in Fahrtrichtung F des Motorrads betrachtet hinterhalb einer Abgasführungseinrichtung 21 (Zweitaktbirne) angeordnet, sodass aufgewirbelte Steine von der Zweitaktbirne 21 abgehalten werden und den Startermotor 2 nicht treffen können. Darüber hinaus liegt der Startermotor 2 auch unterhalb und innerhalb einer Außenfläche 22 eines nicht näher dargestellten Kraftstofftanks des Motorrads, sodass auch im Falle eines Sturzes auf die linke Seite des Motorrads der Startermotor 2 nicht mit dem Boden in Kontakt kommt. Der Schubschraubtrieb 10 und das Winkelgetriebe 14 sind in trockenlauffähigen verschleißfesten Buchsen im Kurbelgehäuse 17 und im Zündungsdeckel 16 sowie einem das Kronenrad 3 abdeckenden Deckel 26 gelagert. Dadurch wird gegenüber einer Lagerung in beispielsweise Wälzlagern eine weniger Bauraum einnehmende Lagerung erzielt.As Fig. 3 the drawing further shows that the starter motor 2 is viewed in the direction of travel F of the motorcycle behind an exhaust guide device 21 (two-stroke bulb) arranged so that whirled stones are held by the two-stroke bulb 21 and the starter motor 2 can not hit. In addition, the starter motor 2 is also below and within an outer surface 22 of a not illustrated fuel tanks of the motorcycle, so that even in the event of a fall on the left side of the motorcycle, the starter motor 2 does not come into contact with the ground. The thrust screw drive 10 and the angle gear 14 are mounted in dry-running wear-resistant bushings in the crankcase 17 and in the ignition cover 16 and the crown wheel 3 covering cover 26. As a result, compared to a storage in, for example, rolling bearings a less space accommodating storage is achieved.

Fig. 5 der Zeichnung nun zeigt noch, dass der Startermotor 2 und das unter dem Deckel 26 angeordnete Kronenrad 3 mittels einer Abdeckung 25 abgedeckt werden können, die über die Schraubbolzen 24 am Antriebsmotor 15 befestigt werden kann, die auch der Festlegung des Zündungsdeckels 16 am Kurbelgehäuse 17 des Antriebsmotors 15 dienen. Fig. 5 The drawing now shows that the starter motor 2 and arranged under the lid 26 crown gear 3 can be covered by a cover 25 which can be attached via the bolt 24 on the drive motor 15, which also determines the ignition cover 16 on the crankcase 17 of the Drive motor 15 serve.

Die erfindungsgemäß vorgesehene elektrische Startvorrichtung zeichnet sich nun dadurch aus, dass sie aufgrund ihrer kompakten, leichtgewichtigen und wenig Bauraum einnehmenden Bauweise an einem Geländesportmotorrad angebracht werden kann, ohne dessen Gesamtgewicht und damit die Fahrdynamik negativ zu beeinflussen.The inventively provided electric starting device is now characterized by the fact that they can be mounted on an off-road sports bike due to their compact, lightweight and little space-consuming construction, without negatively affecting the overall weight and thus the driving dynamics.

Aufgrund seiner Kompaktheit kann die elektrische Startvorrichtung an der Brennkraftmaschine des Geländesportmotorrads auch so angebracht werden, dass sie vor äußerer Einwirkung z. B. Steinschlag, Stürze, Nässe usw. geschützt ist.Due to its compactness, the electric starting device on the internal combustion engine of the off-road motorbike can also be mounted so that it can be protected from external influence z. As rockfall, falls, moisture, etc. is protected.

Die erfindungsgemäße elektrische Startvorrichtung kann in bestehende Motorkonzepte integriert werden, ohne dass Änderungen an dem Motorkonzept notwendig sind. Der Startermotor kann am Motorrad so angebracht werden, dass das Motorrad selbst in keiner Weise modifiziert werden muss, sondern nur für den Elektrostartbetrieb erforderliche Anbauteile, wie beispielsweise eine Fahrzeugbatterie und ein Starterknopf hinzugefügt werden müssen, ohne dass ein Ausbau des montierten Antriebsmotors aus dem Fahrgestell erforderlich ist oder der Antriebsmotor zerlegt werden muss. Andererseits lässt sich auch ein ursprünglich auf reinen Kickstarterbetrieb ausgelegtes Motorkonzept durch eine herstellerseitige geringfügige Modifikation einer Kurbelgehäusehälfte im Bereich des Zündungsdeckels nachträglich auf den Betrieb mit der Startvorrichtung modifizieren. Da die elektrische Startvorrichtung die Baubreite des damit ausgestatteten Motorrads nicht ansteigen lässt und leicht und kompakt aufgebaut ist, verliert das Motorrad nicht an Wettbewerbsfähigkeit und der gesamte Antriebsmomentübertragungsweg vom Startermotor zur Kurbelwelle der Brennkraftmaschine kann unterhalb des Zündungsdeckels angebracht werden und ist somit vor Beschädigung von außen geschützt. Darüber hinaus benötigt die erfindungsgemäße elektrische Startvorrichtung kein Ölbad und kann somit in den trockenen Zündungsraum integriert werden. Der nach der Erfindung vorgesehene Schubschraubtrieb gestattet eine vollständige Entkopplung der Startvorrichtung vom Antriebsmotor nach erfolgtem Start des Antriebsmotors im Gegensatz zu einer bekannten Lösung mit einem im Ölbad laufenden Freilauf, der auch im Freilaufbetrieb Reibung erzeugt. Durch die große Verzahnung am Zündungsrotor und die nach der Erfindung vorgesehene Zwischenwelle wird die benötigte Übersetzung der Startermotordrehzahl ins Langsame zum Starten der Kurbelwelle realisiert, ohne dass dazu übersetzungsmodifizierende Zwischenräder notwendig sind. An der Brennkraftmaschine sind für den Einsatz der elektrischen Startvorrichtung nach der Erfindung keine Modifikationen notwendig, sodass sie für den Betrieb mit der elektrischen Startvorrichtung vorgesehen sein kann, für einen gemischten Betrieb, d. h. mit der elektrischen Startvorrichtung und einem Kickstarter oder auch für einen Betrieb nur mit einem Kickstarter, sodass in diesem Fall auch die elektrische Startvorrichtung nachträglich angebracht werden kann.The electric starting device according to the invention can be integrated into existing engine concepts, without any changes to the engine concept being necessary. The starter motor can be mounted on the motorcycle so that the motorcycle itself need not be modified in any way, but only required for the electric start operation attachments, such as a vehicle battery and a Starter button must be added without the removal of the assembled drive motor from the chassis is required or the drive motor must be disassembled. On the other hand, an originally designed for pure Kickstarterbetrieb engine concept can be modified by a manufacturer's slight modification of a crankcase half in the ignition cover later on the operation with the starting device. Since the electric starting device does not increase the width of the motorcycle equipped therewith and is lightweight and compact, the motorcycle does not lose competitiveness and the entire drive torque transmission path from the starter motor to the crankshaft of the engine can be mounted below the ignition cover and thus protected from outside damage , In addition, the inventive electrical starting device requires no oil bath and can thus be integrated into the dry ignition space. The thrust screw provided according to the invention allows a complete decoupling of the starting device from the drive motor after the start of the drive motor in contrast to a known solution with a freewheel running in the oil bath, which generates friction in the freewheeling operation. Due to the large teeth on Zündungsrotor and provided according to the invention intermediate shaft, the required ratio of the starter motor speed is slow to start the crankshaft realized without the need for translation-modifying intermediate wheels are necessary. At the internal combustion engine no modifications are necessary for the use of the electric starting device according to the invention, so that it may be provided for operation with the electric starting device, for a mixed operation, ie with the electric starting device and a Kickstarter or for operation only with a kickstarter, so that in this case, the electric starting device can be retrofitted.

Hinsichtlich im Vorstehenden nicht näher erläuterter Merkmale wird im Übrigen auf die Ansprüche und die Zeichnung verwiesen.With regard to features not explained in detail above, reference is made to the claims and the drawings, moreover.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
elektrische Startvorrichtungelectric starting device
22
Startermotorstarter motor
2a2a
Stirnradspur gear
33
Kronenradcrown
44
Zwischenwelleintermediate shaft
55
Stirnradspur gear
66
Stirnradverzahnungspur
77
Stirnradverzahnungspur
88th
Stirnradspur gear
99
Wellewave
1010
Schubschraubtrieb, SchubschraubspindelThrust screw drive, thrust screw spindle
1111
Einschubritzelslide-pinion
1212
Verzahnunggearing
1313
Zündungsrotorignition rotor
1414
Winkelgetriebeangle gear
1515
Antriebsmotordrive motor
1616
Zündungsdeckelignition cover
1717
Kurbelgehäusecrankcase
1818
Zylindercylinder
1919
Rahmenunterzugdowntube
2020
Abstützungsupport
2121
ZweitaktbirneTwo clock pear
2222
Außenflächeouter surface
2323
Schraubbolzenbolts
2424
Schraubbolzenbolts
2525
Abdeckungcover
2626
Deckelcover

Claims (10)

  1. An electric starting device of a combustion engine having a starter motor (2), which can be brought into engagement with a toothing (12) on an ignition rotor (13) for driving a crankshaft of the combustion engine (15) via an angular gearing (14) subject to the intermediate connection of a screw-push drive (10) and the motor shaft of the starter motor (2) is largely arranged at a right angle to the crankshaft axis, characterized in that the angular gearing (14) comprises a crown wheel (3) and a spur gear (5), which are arranged on an intermediate shaft (4) in a rotationally fixed manner and in that the spur gear (5) meshes with a spur gear (8) of the screw-push drive (10).
  2. The electric starting device according to Claim 1, characterized in that on the motor shaft of the starter motor a spur gear (2a) is arranged, which meshes with the crown wheel (3) in such a manner that a longitudinal centre axis of the motor shaft runs orientated in the direction of the spur gear toothings (6) of the spur gear (5) of the angular gearing (14) in such a manner that the longitudinal centre axis and the spur gear toothing (6) are located arranged on a side of a longitudinal centre plane of the crown wheel (3).
  3. The electric starting device according to Claim 1 or 2, characterized in that the combustion engine is a drive engine (15) of a single-track vehicle, in particular off-road sports motorcycle.
  4. The electric starting device according to any one of the preceding Claims, characterized in that the angular gearing (14) and the screw-push drive (10) are arranged between a crankcase (17) and a closing cover (16), which can be fixed on the crankcase (17), covering the ignition rotor (13).
  5. The electric starting device according to Claim 4, characterized in that the starter motor (2) is arranged outside the closing cover (16) and can be fixed on a frame component of the single-track vehicle or on the drive engine (15) by means of a support (20).
  6. The electric starting device according to Claim 5, characterized in that the starter motor (2) is fixed in such a manner that it is viewed in travelling direction of the single-track vehicle behind a combustion gas-conducting component (21) and within an outer surface (22) of a fuel tank of the single-track vehicle.
  7. The electric starting device according to any one of the preceding Claims, characterized in that a longitudinal centre axis of a shaft of the screw-push drive (10) largely runs parallel to the longitudinal centre axis of the crankshaft.
  8. The electric starting device according to any one of the Claims 4 to 7, characterized in that the screw-push drive (10) and the angular gearing (14) are mounted in dry running-capable bushes in the crankcase (17) and in the closing cover (16) and in a cover (26) covering the crown wheel (3).
  9. A two-stroke combustion engine (15) having an electric starting device according to any one of the preceding claims.
  10. A vehicle having a frame and at least one front wheel as well as a rear wheel, characterized by a two-stroke combustion engine (15) according to Claim 9.
EP06762887A 2005-08-01 2006-07-28 Electric starting device for an internal combustion engine Not-in-force EP1920157B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005036087A DE102005036087A1 (en) 2005-08-01 2005-08-01 Electric starting device of an internal combustion engine
PCT/EP2006/007506 WO2007014719A1 (en) 2005-08-01 2006-07-28 Electric starting device for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1920157A1 EP1920157A1 (en) 2008-05-14
EP1920157B1 true EP1920157B1 (en) 2012-12-19

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Application Number Title Priority Date Filing Date
EP06762887A Not-in-force EP1920157B1 (en) 2005-08-01 2006-07-28 Electric starting device for an internal combustion engine

Country Status (8)

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US (1) US20090293670A1 (en)
EP (1) EP1920157B1 (en)
JP (1) JP2009503347A (en)
AU (1) AU2006275095A1 (en)
DE (1) DE102005036087A1 (en)
ES (1) ES2402271T3 (en)
WO (1) WO2007014719A1 (en)
ZA (1) ZA200801191B (en)

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DE102015006365B4 (en) * 2015-05-20 2021-09-30 Deutz Aktiengesellschaft Internal combustion engine with at least one electric motor
CN110690550B (en) * 2019-10-31 2020-11-20 湖南省通信建设有限公司 Antenna device

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Also Published As

Publication number Publication date
JP2009503347A (en) 2009-01-29
DE102005036087A1 (en) 2007-02-08
AU2006275095A1 (en) 2007-02-08
WO2007014719A1 (en) 2007-02-08
ZA200801191B (en) 2008-11-26
US20090293670A1 (en) 2009-12-03
ES2402271T3 (en) 2013-04-30
EP1920157A1 (en) 2008-05-14

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