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DE3711729A1 - Adjustable crankshaft which makes it possible to perform continuous adjustment of the stroke of piston machines during operation - Google Patents

Adjustable crankshaft which makes it possible to perform continuous adjustment of the stroke of piston machines during operation

Info

Publication number
DE3711729A1
DE3711729A1 DE19873711729 DE3711729A DE3711729A1 DE 3711729 A1 DE3711729 A1 DE 3711729A1 DE 19873711729 DE19873711729 DE 19873711729 DE 3711729 A DE3711729 A DE 3711729A DE 3711729 A1 DE3711729 A1 DE 3711729A1
Authority
DE
Germany
Prior art keywords
stroke
adjustable crankshaft
machines
crankshaft
adjustable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19873711729
Other languages
German (de)
Inventor
Josef Smidrkal
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19873711729 priority Critical patent/DE3711729A1/en
Publication of DE3711729A1 publication Critical patent/DE3711729A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/06Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with cylinders in star or fan arrangement
    • F01B1/0675Controlling
    • F01B1/0686Controlling by changing the effective piston stroke
    • F01B1/0689Controlling by changing the effective piston stroke by changing the excentricity of one element relative to another element
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/04Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with cylinders in V-arrangement
    • 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
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B75/22Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D15/00Varying compression ratio
    • F02D15/04Varying compression ratio by alteration of volume of compression space without changing piston stroke
    • 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
    • F16C3/00Shafts; Axles; Cranks; Eccentrics
    • F16C3/04Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/22Cranks; Eccentrics
    • F16C3/28Adjustable cranks or eccentrics
    • 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
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B2075/1804Number of cylinders
    • F02B2075/1808Number of cylinders two

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The subject-matter of the invention is an adjustable crankshaft. The invention belongs to the field of piston machines. The object of the adjustable crankshaft is to enable the stroke of piston machines to be adjusted from outside during the operation of the machines. With the adjustable crankshaft, machines such as pumps and compressors can be adjusted to the particular operating conditions. In the case of engines such as internal combustion engines, it is possible to exert a positive influence on the fuel consumption and exhaust characteristics. The adjustable crankshaft can be used both with single-cylinder and multi-cylinder machines. It is also possible to use a plurality of crankshafts in a single machine. <IMAGE>

Description

Gegenstand der Erfindung ist eine Kurbelwelle, die es ermöglicht, den Hub von Kolbenmaschinen während des Betriebes stufenlos zu verstellen.The invention relates to a crankshaft that enables the stroke of piston machines continuously adjustable during operation.

Aus der Möglichkeit den Hub von Kolbenmaschinen kontinuierlich verstellen zu können, ergibt sich der Vorteil, daß sich das Verdichtungsverhältnis der Maschinen dem jeweiligen Betriebszustand optimal anpassen läßt. Dieser Vor­ teil kann sowohl bei Kraft- als auch bei Arbeitsmaschinen genutzt werden.From the possibility to continuously adjust the stroke of piston machines to be able to, there is the advantage that the compression ratio of Machines can be optimally adapted to the respective operating state. This before some can be used with both power and work machines.

Bei Ottomotoren lassen sich der spezifische Kraftstoffverbrauch, sowie die Schadstoffkonzentration im Abgas mit den Hauptbestandteilen Kohlenoxid, Kohlenwasserstoffe und Stickoxiden wesentlich reduzieren, wenn die Motoren mit etwa 20% Luftüberschuß betrieben werden. Der Betrieb eines Ottomotors mit einem Luftüberschuß dieser Größenordnung macht es allerdings erforder­ lich, das Verdichtungsverhältnis des Motors in Abhängigkeit von der Dreh­ zahl zu verändern. Dieses Problem läßt sich durch den Einsatz der verstell­ baren Kurbelwelle lösen.In gasoline engines, the specific fuel consumption and the Pollutant concentration in the exhaust gas with the main components carbon oxide, Reduce hydrocarbons and nitrogen oxides significantly when the engines be operated with about 20% excess air. Operation of a gasoline engine with an excess of air of this size, however, makes it necessary Lich, the compression ratio of the engine depending on the rotation change number. This problem can be adjusted by using the Detachable crankshaft.

Bei Kolbenpumpen und Kolbenverdichtern läßt sich die Förderleistung durch Verstellung des Kolbenhubes bei konstanter Drehzahl den jeweiligen Er­ fordernissen entsprechend regulieren.In the case of piston pumps and piston compressors, the delivery rate can be checked Adjustment of the piston stroke at constant speed the respective Er regulate accordingly.

Die Beschreibung und die zeichnerische Darstellung der Erfindung kennzeichnet lediglich den grundsätzlichen Aufbau und die Wirkungsweise der verstellbaren Kurbelwelle. Festigkeitsberechnungen, Dimensionierung und Werkstoffauswahl sind nicht Bestandteil dieses Latentantrages.The description and the graphic representation of the invention characterize only the basic structure and the mode of operation of the adjustable Crankshaft. Strength calculations, dimensioning and selection of materials are not part of this deferred application.

Die Erfindung wird anhand der Zeichnungen Fig. 1 bis Fig. 6 erläutert. Es zeigtThe invention is explained with reference to the drawings Fig. 1 to Fig. 6. It shows

Fig. 1 Ausführungsform I, geeignet zur Übertragung großer Drehmomente, FIG. 1, I, suitable for transmitting large torques,

Fig. 2 Ausführungsform II, geeignet zur Übertragung kleinerer Drehmomente, Fig. 2 embodiment II, suitable for the transmission of small torques,

Fig. 3 Seitenansicht der Ausführungsform II, Fig. 3 side view of the embodiment II,

Fig. 4 Draufsicht der Ausführungsformen I und II, Fig. 4 top view of the embodiments I and II,

Fig. 5 Schnittansicht der Ausführungsformen I und II, Fig. 5-sectional view of the embodiments I and II,

Fig. 6 mögliche Ausführung einer Kolbenmaschine, bei der die verstellbare Kurbelwelle nach Ausführungsform I und II eingesetzt werden kann. Fig. 6 possible embodiment of a piston engine, in which the adjustable crankshaft according to embodiment I and II can be used.

Mit Ziffern sind ausschließlich die Bauteile gekennzeichnet, die für die Be­ schreibung von wesentlicher Bedeutung sind. Only the components that are required for the Be writing are essential.  

Zur Ausführung IFor execution I

Die Hohlwelle (6) ist im Gehäuse (7) drehbar gelagert. Das An- bzw. Abtriebs­ drehmoment der Kolbenmaschine wird über die Hohlwelle übertragen. In der Hohl­ welle ist die Stellwelle (5) drehbar gelagert. Bei Betrieb der Kolbenmaschine drehen sich beide Wellen gemeinsam. Die Führungsplatte (3) ist starr mit der Hohlwelle verbunden. In der Führungsplatte ist der Gleitstein (2) radial ver­ schiebbar angeordnet. Der Kurbelzapfen (1) ist in den Gleitstein eingesetzt und ragt in die Führungsnut der Stellplatte (4). Die Stellplatte ist fest mit der Stellwelle verbunden. Hohlwelle und Stellwelle sind über die Kupplung (8) miteinander verbunden. Die Verbindung erfolgt über Keilwellenprofile. Zwischen Stellwelle und Kupplung ist das Keilwellenprofil achsparallel ausgebildet. Zwischen Kupplung und Hohlwelle ist das Keilwellenprofil gegenüber der Achs­ richtung geneigt angeordnet. Wird die Kupplung in Achsrichtung verschoben, so verdrehen sich Hohlwelle und Stellwelle relativ zueinander. Durch die Anordnung der Führungsnut in der Stellplatte, welche aus Fig. 5 ersichtlich ist, wird der Kurbelzapfen radial verschoben und das Maß der Exzentrizität wird verändert.The hollow shaft ( 6 ) is rotatably mounted in the housing ( 7 ). The input and output torque of the piston machine is transmitted via the hollow shaft. In the hollow shaft, the control shaft ( 5 ) is rotatably mounted. When the piston machine is operating, both shafts rotate together. The guide plate ( 3 ) is rigidly connected to the hollow shaft. In the guide plate, the sliding block ( 2 ) is arranged to slide radially ver. The crank pin ( 1 ) is inserted in the sliding block and protrudes into the guide groove of the setting plate ( 4 ). The setting plate is firmly connected to the setting shaft. Hollow shaft and control shaft are connected to each other via the coupling ( 8 ). The connection is made via spline profiles. The spline profile is formed axially parallel between the adjusting shaft and the coupling. Between the coupling and the hollow shaft, the spline profile is inclined with respect to the axis direction. If the coupling is moved in the axial direction, the hollow shaft and the actuating shaft rotate relative to one another. Due to the arrangement of the guide groove in the setting plate, which can be seen in FIG. 5, the crank pin is displaced radially and the degree of eccentricity is changed.

Zur Ausführung IIFor execution II

Der Aufbau und die Funktion der Ausführung II entsprechen denen der Aus­ führung I bis auf die Verbindung von Hohl- und Stellwelle. Die Verbindung erfolgt über den Mitnehmerstift (8 a). Der Mitnehmerstift wird in der Stell­ welle in einer achsparallelen Nut geführt. In der Hohlwelle ist die Führungs­ nut für den Mitnehmerstift gegenüber der Achsrichtung geneigt angeordnet. Wird der Mitnehmerstift in Achsrichtung verschoben, so verdrehen sich Hohl­ welle und Stellwelle relativ zueinander. Der Mitnehmerstift ragt mit beiden Enden aus der Hohlwelle heraus und in den Stellring (9) hinein. Die Ver­ schiebung des Mitnehmerstiftes erfolgt über den Stellmechanismus mit den Teilen (10) und (11). Der grundsätzliche Aufbau ist aus Fig. 2 und Fig. 3 ersichtlich.The structure and function of version II correspond to those of version I except for the connection of the hollow and actuating shaft. The connection is made using the driver pin ( 8 a) . The driver pin is guided in the adjusting shaft in an axially parallel groove. In the hollow shaft, the guide groove for the driver pin is arranged inclined to the axial direction. If the driver pin is moved in the axial direction, the hollow shaft and the actuating shaft rotate relative to one another. The driver pin protrudes with both ends out of the hollow shaft and into the adjusting ring ( 9 ). The displacement of the driver pin takes place via the adjusting mechanism with the parts ( 10 ) and ( 11 ). The basic structure is shown in FIG. 2 and FIG. 3.

Claims (2)

1. Verstellbare Kurbelwelle, die es ermöglicht, den Hub von Kolben­ maschinen während des Betriebes stufenlos zu verstellen. Das Ver­ stellen erfolgt durch axiales Verschieben einer Kupplung.1. Adjustable crankshaft, which allows the stroke of pistons infinitely adjustable machines during operation. The Ver adjust by axially shifting a coupling. 2. Verstellbare Kurbelwelle wie unter Anspruch 1, jedoch erfolgt das Verstellen durch axiales Verschieben eines Mitnehmerstiftes.2. Adjustable crankshaft as in claim 1, but this is done Adjustment by axially moving a driver pin.
DE19873711729 1987-04-07 1987-04-07 Adjustable crankshaft which makes it possible to perform continuous adjustment of the stroke of piston machines during operation Withdrawn DE3711729A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873711729 DE3711729A1 (en) 1987-04-07 1987-04-07 Adjustable crankshaft which makes it possible to perform continuous adjustment of the stroke of piston machines during operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873711729 DE3711729A1 (en) 1987-04-07 1987-04-07 Adjustable crankshaft which makes it possible to perform continuous adjustment of the stroke of piston machines during operation

Publications (1)

Publication Number Publication Date
DE3711729A1 true DE3711729A1 (en) 1988-10-27

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ID=6325070

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873711729 Withdrawn DE3711729A1 (en) 1987-04-07 1987-04-07 Adjustable crankshaft which makes it possible to perform continuous adjustment of the stroke of piston machines during operation

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DE (1) DE3711729A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0394061A3 (en) * 1989-04-21 1992-05-06 Honda Giken Kogyo Kabushiki Kaisha Variable-stroke crank mechanism
DE4040274A1 (en) * 1990-12-17 1992-06-25 Reinhard Weber Reciprocating piston IC engine - has dead centre adjustable dependent upon temp.
EP1236877A3 (en) * 2001-02-28 2003-05-21 Nissan Motor Co., Ltd. Piston actuation system of V-type engine with variable compression ratio mechanism
WO2003042521A3 (en) * 2001-11-14 2005-02-17 Massachusetts Inst Technology High compression ratio, hydrogen enhanced gasoline engine system
WO2005057007A1 (en) * 2003-12-15 2005-06-23 Hydrostatic Design Technology Pty Ltd Hydraulic motor/pump

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0394061A3 (en) * 1989-04-21 1992-05-06 Honda Giken Kogyo Kabushiki Kaisha Variable-stroke crank mechanism
DE4040274A1 (en) * 1990-12-17 1992-06-25 Reinhard Weber Reciprocating piston IC engine - has dead centre adjustable dependent upon temp.
EP1236877A3 (en) * 2001-02-28 2003-05-21 Nissan Motor Co., Ltd. Piston actuation system of V-type engine with variable compression ratio mechanism
US6729273B2 (en) 2001-02-28 2004-05-04 Nissan Motor Co., Ltd. Piston actuation system of V-type engine with variable compression ratio mechanism
WO2003042521A3 (en) * 2001-11-14 2005-02-17 Massachusetts Inst Technology High compression ratio, hydrogen enhanced gasoline engine system
US7028644B2 (en) 2001-11-14 2006-04-18 Massachusetts Institute Of Technology High compression ratio, hydrogen enhanced engine system
WO2005057007A1 (en) * 2003-12-15 2005-06-23 Hydrostatic Design Technology Pty Ltd Hydraulic motor/pump
CN100482939C (en) * 2003-12-15 2009-04-29 流体静力设计技术集团有限公司 Hydraulic motor/pump
US7637202B2 (en) 2003-12-15 2009-12-29 Hydrostatic Design Technology Pty Ltd Hydraulic motor/pump

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