DE102009037434B3 - Length adjustable connecting rod for motor, has eccentric shaft that detachably connects connecting rod arm with another connecting rod arm such that two different lengths are adjusted - Google Patents

Length adjustable connecting rod for motor, has eccentric shaft that detachably connects connecting rod arm with another connecting rod arm such that two different lengths are adjusted Download PDF

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Publication number
DE102009037434B3
DE102009037434B3 DE200910037434 DE102009037434A DE102009037434B3 DE 102009037434 B3 DE102009037434 B3 DE 102009037434B3 DE 200910037434 DE200910037434 DE 200910037434 DE 102009037434 A DE102009037434 A DE 102009037434A DE 102009037434 B3 DE102009037434 B3 DE 102009037434B3
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Germany
Prior art keywords
connecting rod
eccentric shaft
profile
rod arm
rotation
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DE200910037434
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German (de)
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Juergen Werner Kropp
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Kropp Juergen Werner
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Kropp Juergen Werner
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/04Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/045Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/06Adjustable connecting-rods

Abstract

The length adjustable connecting rod has an eccentric shaft (15) that detachably connects a connecting rod arm (13) with another connecting rod arm (14) such that two different lengths are adjusted. The former connecting rod arm is formed within the range of the eccentric shaft as U-section. The length variation of the connecting rod of the compression relationship is changed.

Description

Stand der Technik:State of the art:

Bei den bereits bekannten variablen Pleuelstangen wird die Position der Lagerung mit der Kurbelwelle oder dem Kolben verändert. Dieses geschieht mit verschiedenartigen Exzentern, die je nach Ansteuerung den Abstand zwischen Kolben und Zylinder verändern. Diese Änderung an den Pleuelstangen fand in Motoren für hohe Drücke noch keine Anwendung, obwohl die Forderung nach einer Lösung besteht.In the known variable connecting rods, the position of the bearing with the crankshaft or the piston is changed. This is done with various eccentrics that change the distance between the piston and cylinder depending on the control. This change in the connecting rods has not yet been used in high pressure engines, although there is a demand for a solution.

In den Druckschriften FR 895 270 A und DE 1 871 435 U sind Schubstangen beschrieben, die nicht im Betrieb verstellt werden können und bei denen keine Exzenterwelle zum Einsatz kommt.In the pamphlets FR 895 270 A and DE 1 871 435 U are push rods described that can not be adjusted during operation and where no eccentric shaft is used.

Aufgabenstellung:Task:

Der Erfindung liegt die Aufgabe zugrunde, eine verstellbare Pleuelstange in zwei Längen für einen Motor zu schaffen, der den erzeugten Druck (P) auf den Kolben sicher auf die Kurbelwelle überträgt. Die Schnittstelle zu der Kurbelwelle und dem Kolben soll nicht geändert werden. Die neue Pleuelstange soll aus wenigen Teilen bestehen, leicht ansteuerbar sein und eine feste, jedoch lösbare Verbindung im Betrieb ermöglichen.The invention has for its object to provide an adjustable connecting rod in two lengths for an engine that transmits the generated pressure (P) on the piston securely on the crankshaft. The interface to the crankshaft and the piston should not be changed. The new connecting rod should consist of a few parts, be easily controllable and allow a firm, but detachable connection during operation.

Ausführungsbeispiel:Embodiment:

Die Erfindung wird im Folgenden an Hand der Zeichnungen mit 1, 2 und 3 erläutert. Dabei zeigt 1 in schematischer Darstellung als Schnitt die drei Teile Pleuelarm (13), Pleuelarm (14) und Exzenterwelle (15) mit Flügel (16). Die 2 zeigt dazu die Draufsicht und 3 die Anordnung mit Kolben, verstellbarer Pleuelstange und Kurbelwelle. Die Pleuelstange bildet sich aus dem Pleuelarm (13), dem Pleuelarm (14) und der Exzenterwelle (15) mit Flügel (16). Die Exzenterwelle (15) lagert in den Seitenwänden des Pleuelarms (13), der zu einem Teil als U-Profil geformt ist. Der Pleuelarm (14), der in fixierter Position in dem Bereich gleichen Profils mit einer Seite auch an der Innenwand zwischen den Seitenwänden vom Pleuelarm (13) anliegt, lagert in der Innenwelle der Exzenterwelle (15). Durch die Verlängerung der Pleuelstange kann mehr Druck übertragen werden.The invention will be described below with reference to the drawings 1 . 2 and 3 explained. It shows 1 in a schematic representation as a section of the three parts Pleuelarm ( 13 ), Connecting rod ( 14 ) and eccentric shaft ( 15 ) with wings ( 16 ). The 2 shows the plan view and 3 the arrangement with piston, adjustable connecting rod and crankshaft. The connecting rod is formed by the connecting rod ( 13 ), the connecting rod ( 14 ) and the eccentric shaft ( 15 ) with wings ( 16 ). The eccentric shaft ( 15 ) stores in the side walls of the connecting rod ( 13 ), which is shaped in part as a U-profile. The connecting rod ( 14 ), in the fixed position in the region of the same profile with one side also on the inner wall between the side walls of the connecting rod ( 13 ) bears, in the inner shaft of the eccentric shaft ( 15 ). By extending the connecting rod more pressure can be transferred.

Die Kompression kann erhöht werden, indem die Exzenterwelle (15) über seinen Flügel (16) in der Hubbewegung von Kolben (12) gedreht wird. Die beiden Pleuelarme lösen sich und setzen sich in veränderter Position wieder fest. Ist die Pleuelstange verlängert, ist der obere Totpunkt höher gelegt. Etwa 30 Prozent Verringerung des Volumens des komprimierten Raumes (P) sollte erreicht werden. Die Drehung der Exzenterwelle (15) wird erreicht durch das Einführen eines Bolzens in den Kurbelraum, z. B. ausgelöst durch einen Magneten. Über die Geometrie der Exzenterwelle (15) wird die Längenänderung der Pleuelstange bestimmt, die sich je nach Ausführung um etwa 80 bis 180 Grad dreht. Nach der Drehung sind die beiden Pleuelarme auf einer Linie verschoben und fest verbunden. Weder Zug- noch Druckkräfte über die Enden der Pleuelstange können diese lösen. Die Exzenterwelle (15) in Verbindung mit den beiden Pleuelarmen wirkt wie ein überhängendes Gelenk mit Verkeilung, und das in beiden Richtungen gleich. Der Pleuelarm (13) ist zum Teil in U-Profil oder Vierkant-Profil (hohl) ausgeführt, und in seinen Seitenwänden lagert die Exzenterwelle (15). Der neuralgische Bereich dieser Pleuelarmverbindung ist dieses Lager. Es muss für den Zünddruck ausgelegt sein.The compression can be increased by the eccentric shaft ( 15 ) over his wing ( 16 ) in the stroke movement of pistons ( 12 ) is rotated. The two connecting arms release and reassemble in a different position. If the connecting rod is extended, the top dead center is higher. Approximately 30 Percent reduction of the volume of the compressed space (P) should be achieved. The rotation of the eccentric shaft ( 15 ) is achieved by the insertion of a bolt in the crankcase, z. B. triggered by a magnet. About the geometry of the eccentric shaft ( 15 ), the change in length of the connecting rod is determined, which rotates depending on the version by about 80 to 180 degrees. After rotation, the two connecting arms are moved in a line and firmly connected. Neither tensile nor compressive forces over the ends of the connecting rod can solve this. The eccentric shaft ( 15 ) in conjunction with the two connecting rod arms acts as an overhanging joint with wedging, and the same in both directions. The connecting rod ( 13 ) is executed partly in U-profile or square profile (hollow), and in its side walls supports the eccentric shaft ( 15 ). The neuralgic area of this Pleuelarmverbindung is this camp. It must be designed for the ignition pressure.

Claims (1)

In der Länge verstellbare Pleuelstange, die an ihren Enden einen Kolben mit einer Kurbelwelle für einen Motor verbindet, bestehend aus dem Pleuelarm (14) mit Vollprofil, dem Pleuelarm (13) mit Voll- und U-Profil und einer Exzenterwelle (15), die mit zwei Kurbelzapfen in den Bohrungen des Pleuelarms (13) gelagert ist und den Pleuelarm (14) aufnimmt, wobei die Pleuelarme (13) und (14) wahlweise an der Kurbelwelle und dem Kolben befestigt sind, mit Rücksicht auf deren Durchmesser an den Lagerstellen, dadurch gekennzeichnet, dass die Exzenterwelle (15) den Pleuelarm (13) mit dem Pleuelarm (14) lösbar, jedoch an den Anschlagpunkten fest – wie ein Schloss – verbindet, so dass zwei unterschiedliche Längen einstellbar sind, wobei der Pleuelarm (13) im Bereich der Exzenterwelle (15) als U-Profil (auch ein Vierkant-Hohlprofil oder gerundet ist möglich) ausgebildet ist, dort den an der festzusetzenden Innenwand profilgleichen Pleuelarm (14) in sich aufnimmt und mit ihm in der ersten Anschlagsposition eine starre Verbindung bildet, bis die Exzenterwelle (15) gedreht wird, den Pleuelarm (14) dann bogenförmig von der Innenwand des Pleuelarms (13) abhebt und in der zweiten Anschlagsposition neu fixiert, wodurch die Pleuelstange verlängert bzw. verkürzt wird, wobei dieses durch Drehung eines an der Exzenterwelle (15) angebrachten Flügels (16), der sich dreht, bis er auf einen Anschlag trifft, und durch das Einführen eines Bolzens in den Kurbelraum erreicht wird, was auch mit Hilfe einer Hydraulik- oder einer Magnetvorrichtung bewerkstelligt werden kann; die Drehung der Exzenterwelle (15) kann hierbei während der Drehung der Kurbelwelle (11) erfolgen, wobei die daraus resultierende Längenänderung der Pleuelstange das Kompressionsverhältnis verändert und eine Rückkehr zu dem vorherigen Kompressionsverhältnis durch Drehung des Flügels (16) in umgekehrter Richtung erreicht wird.Length-adjustable connecting rod connecting at its ends a piston with a crankshaft for a motor, consisting of the connecting rod ( 14 ) with solid profile, the connecting rod ( 13 ) with solid and U-profile and an eccentric shaft ( 15 ) with two crank pins in the bores of the connecting rod ( 13 ) and the connecting rod ( 14 ), wherein the connecting arms ( 13 ) and ( 14 ) are selectively attached to the crankshaft and the piston, with regard to their diameter at the bearing points, characterized in that the eccentric shaft ( 15 ) the connecting rod ( 13 ) with the connecting rod ( 14 ) releasably, but at the attachment points firmly - like a lock - connects, so that two different lengths are adjustable, the connecting rod ( 13 ) in the region of the eccentric shaft ( 15 ) as a U-profile (also a square hollow profile or rounded is possible) is formed, there the profile on the fixed inner wall profile-like Pleuelarm ( 14 ) receives in itself and forms a rigid connection with him in the first stop position until the eccentric shaft ( 15 ), the connecting rod ( 14 ) then arcuately from the inner wall of the Pleuelarms ( 13 ) lifts and repositioned in the second stop position, whereby the connecting rod is extended or shortened, this by rotation of a on the eccentric shaft ( 15 ) mounted wing ( 16 ), which rotates until it encounters a stop, and is reached by the insertion of a bolt into the crank chamber, which can also be accomplished by means of a hydraulic or a magnetic device; the rotation of the eccentric shaft ( 15 ) can during the rotation of the crankshaft ( 11 ), wherein the resulting change in length of the connecting rod changes the compression ratio and a return to the previous compression ratio by rotation of the wing ( 16 ) is achieved in the reverse direction.
DE200910037434 2009-08-13 2009-08-13 Length adjustable connecting rod for motor, has eccentric shaft that detachably connects connecting rod arm with another connecting rod arm such that two different lengths are adjusted Withdrawn - After Issue DE102009037434B3 (en)

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DE200910037434 DE102009037434B3 (en) 2009-08-13 2009-08-13 Length adjustable connecting rod for motor, has eccentric shaft that detachably connects connecting rod arm with another connecting rod arm such that two different lengths are adjusted

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DE200910037434 DE102009037434B3 (en) 2009-08-13 2009-08-13 Length adjustable connecting rod for motor, has eccentric shaft that detachably connects connecting rod arm with another connecting rod arm such that two different lengths are adjusted

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018127741A1 (en) * 2018-11-07 2020-05-07 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine for a motor vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR895270A (en) * 1943-06-08 1945-01-19 Motor timing adjustment device
DE1871435U (en) * 1963-02-18 1963-05-02 Bbc Brown Boveri & Cie PUSH ROD WITH ADJUSTABLE EFFECTIVE LENGTH.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR895270A (en) * 1943-06-08 1945-01-19 Motor timing adjustment device
DE1871435U (en) * 1963-02-18 1963-05-02 Bbc Brown Boveri & Cie PUSH ROD WITH ADJUSTABLE EFFECTIVE LENGTH.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018127741A1 (en) * 2018-11-07 2020-05-07 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine for a motor vehicle
DE102018127741B4 (en) * 2018-11-07 2020-11-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Internal combustion engine for a motor vehicle

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R020 Patent grant now final

Effective date: 20110917

R120 Application withdrawn or ip right abandoned