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 operationInfo
- 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- Withdrawn
Links
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
- F01B1/06—Reciprocating-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
- F01B1/0675—Controlling
- F01B1/0686—Controlling by changing the effective piston stroke
- F01B1/0689—Controlling by changing the effective piston stroke by changing the excentricity of one element relative to another element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
- F01B1/04—Reciprocating-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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D15/00—Varying compression ratio
- F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/22—Cranks; Eccentrics
- F16C3/28—Adjustable cranks or eccentrics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1808—Number 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
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.
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.
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)
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 |
Family
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 |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3711729A1 (en) |
Cited By (5)
| 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 |
-
1987
- 1987-04-07 DE DE19873711729 patent/DE3711729A1/en not_active Withdrawn
Cited By (9)
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |