EP0767300B1 - Two stroke V-engine - Google Patents
Two stroke V-engine Download PDFInfo
- Publication number
- EP0767300B1 EP0767300B1 EP19960810631 EP96810631A EP0767300B1 EP 0767300 B1 EP0767300 B1 EP 0767300B1 EP 19960810631 EP19960810631 EP 19960810631 EP 96810631 A EP96810631 A EP 96810631A EP 0767300 B1 EP0767300 B1 EP 0767300B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- crankshaft
- pistons
- stroke
- cylinders
- 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.)
- Expired - Lifetime
Links
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Classifications
-
- 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
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/14—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
-
- 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
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/26—Multi-cylinder engines other than those provided for in, or of interest apart from, groups F02B25/02 - F02B25/24
- F02B25/28—Multi-cylinder engines other than those provided for in, or of interest apart from, groups F02B25/02 - F02B25/24 with V-, fan-, or star-arrangement of cylinders
-
- 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
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
-
- 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
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
-
- 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
Definitions
- the present invention relates to a two-stroke V-engine with at least one consisting of two cylinders Unit, with two pistons, each arranged on a one-piece connecting rod are that act on a common crankshaft.
- the present application relates in particular to an engine for racing motorcycles, where it v. a. on good acceleration and top speed arrives.
- Such racing engines have become two-stroke engines in particular enforced in a V-arrangement, because in this case the Carburetor right in front of the engine and exhaust right behind the engine can be arranged, and in particular a Narrow construction is achieved, which among other things Turning brings advantages.
- Cylinders are known from DE-C-672 964, in which it is mentioned that two cylinders each from a single one Crank chamber are flushed out, however, the two cylinders connected with a pin and staggered. The difficulties arising from this arrangement for the crank chamber by means of an additional, double-acting compensating piston released. In addition, the Crankshaft supported with a bearing in the middle.
- each cylinder pair has a common crank chamber and the crankshaft is not supported in the middle, however the cylinders are offset by 180 ° to each other, i.e. it is a boxer engine. Also are the connecting rods are made up of several parts and are therefore heavier as one piece.
- the two-stroke V-engine dates from 1922, or 1939 moved in another direction.
- a two-cylinder unit consists of two of each other separate single cylinders, each with a crankcase space have, the pistons in this way on the common Crankshafts are arranged that one in time staggered movement arises from this in particular Figure 1 emerges.
- FIGs 1 and 2 show schematically a two-stroke V-engine 1 according to the prior art with the two pistons 2 and 3, which are attached to a connecting rod 4 and 5, one of the two inlets 6 and the two outlets 7 and 8.
- This engine is a crankcase-flushed engine, the Fuel-air mixture in the crankcase is compressed and then gets into the cylinders 9 or 10.
- crankshaft 11 can also be seen in FIG as well as the crank arm pairs 12 and 13 and the power output 14. It can also be seen from FIG. 2 that the two crankcase spaces 16 and 17 separated and on the Crankshaft are sealed via shaft seals 15. At In this construction, there are three main crankshaft bearings 24 necessary.
- the usual piston rings 18 can also be seen as well as the spark plugs 19.
- FIG two cylinder housings 20 and 21 and the crankcase housing 22 and a crank pin 23 can be seen.
- FIGs 3 and 4 is an embodiment of a Racing engine according to the invention with a two-cylinder unit shown.
- the piston 34 is located in the cylinder housing and 35, which run in the cylinders 36 and 37 and on the, as seen in Figure 3, one-piece connecting rods 38 and 39 are arranged.
- the two connecting rods are with the common crankshaft 48 via the known Elements such as crank pin 49 and bends connected.
- the two are Pistons arranged on the crankshaft so that they run in the same direction, d. that is, both pistons are working simultaneously are in the top dead center position, as in Figure 3 shown, or simultaneously in the bottom dead center position.
- Such a piston arrangement gives one maximum pre-compression, but can in this engine arrangement also offset pistons can be used.
- the pistons with the piston rings 46 can in themselves worked the same as the known pistons.
- the spark plugs 47 are also indicated.
- the present exemplary embodiment is a two-cylinder two-stroke V-engine, but can do that above principle disclosed, of course, with adjustments, for an engine with more than one two-cylinder unit be taken over, especially for a four-cylinder engine.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Description
Die vorliegende Erfindung bezieht sich auf einen Zweitakt V-Motor mit mindestens einer aus zwei Zylindern bestehenden Einheit, mit zwei Kolben, die an je einer einteiligen Pleuelstange angeordnet sind, die auf eine gemeinsame Kurbelwelle wirken. Die vorliegende Anmeldung bezieht sich insbesondere auf einen Motor für Rennmotorräder, wobei es dort v. a. auf gute Beschleunigung und Höchstgeschwindigkeit ankommt. Bei solchen Rennmotoren haben sich insbesondere Zweitaktmotoren in V-Anordnung durchgesetzt, da in diesem Falle der Vergaser direkt vor dem Motor und der Auspuff direkt hinter dem Motor angeordnet werden können, und insbesondere eine schmale Bauweise erzielt wird, die unter anderem beim Kurvenfahren Vorteile bringt.The present invention relates to a two-stroke V-engine with at least one consisting of two cylinders Unit, with two pistons, each arranged on a one-piece connecting rod are that act on a common crankshaft. The present application relates in particular to an engine for racing motorcycles, where it v. a. on good acceleration and top speed arrives. At Such racing engines have become two-stroke engines in particular enforced in a V-arrangement, because in this case the Carburetor right in front of the engine and exhaust right behind the engine can be arranged, and in particular a Narrow construction is achieved, which among other things Turning brings advantages.
Ein Mehrzylinder-Zweitaktmotor mit V-förmig angeordneten Zylindern ist aus der DE-C-672 964 bekannt, worin zwar erwähnt wird, dass zwei Zylinder jeweils von einer einzigen Kurbelkammer ausgespült werden, jedoch die beiden Zylinder mit einem Zapfen verbunden und versetzt angeordnet sind. Die durch diese Anordnung sich ergebenden Schwierigkeiten für die Kurbelkammer werden mittels einem zusätzlichen, doppelt wirkenden Ausgleichkolben gelöst. Ausserdem ist die Kurbelwelle mit einem Lager in der Mitte abgestützt.A multi-cylinder two-stroke engine with a V-shaped arrangement Cylinders are known from DE-C-672 964, in which it is mentioned that two cylinders each from a single one Crank chamber are flushed out, however, the two cylinders connected with a pin and staggered. The difficulties arising from this arrangement for the crank chamber by means of an additional, double-acting compensating piston released. In addition, the Crankshaft supported with a bearing in the middle.
Beim Motor gemäss GB-A-185,181 aus dem Jahre 1922 besitzt jedes Zylinderpaar zwar eine gemeinsame Kurbelkammer und die Kurbelwelle ist in der Mitte nicht abgestützt, doch sind die Zylinder um 180° zueinander versetzt angeordnet, d.h, es handelt sich um einen Boxer-Motor. Ausserdem sind die Pleuelstangen mehrteilig aufgebaut und somit schwerer als einteilige.In the engine according to GB-A-185,181 from 1922 each cylinder pair has a common crank chamber and the crankshaft is not supported in the middle, however the cylinders are offset by 180 ° to each other, i.e. it is a boxer engine. Also are the connecting rods are made up of several parts and are therefore heavier as one piece.
Der Zweitakt V-Motor hat sich jedoch vom Jahre 1922, bzw. 1939 an in eine andere Richtung bewegt. Bei den vorbekannten Zweitakt V-Motoren der neueren Zeit, siehe Figuren 1 und 2, besteht eine Zweizylindereinheit aus zwei voneinander getrennten Einzelzylindern, die je ein KurbelgehäuseRaum aufweisen, wobei die Kolben derart an der gemeinsamen Kurbelwelle angeordnet sind, dass jeweils eine zeitlich versetzte Bewegung entsteht, wie dies insbesondere aus Figur 1 hervorgeht.The two-stroke V-engine, however, dates from 1922, or 1939 moved in another direction. With the previously known Modern two-stroke V-engines, see Figures 1 and 2, a two-cylinder unit consists of two of each other separate single cylinders, each with a crankcase space have, the pistons in this way on the common Crankshafts are arranged that one in time staggered movement arises from this in particular Figure 1 emerges.
Es ist von diesem bekannten Stand der Technik ausgehend
Aufgabe der vorliegenden Erfindung, einen Zweitakt V-Motor
anzugeben, der einerseits eine höhere Vor-Kompression und
andererseits Gewichts- und Volumeneinsparungen ermöglicht.
Ein Motor, der diese Aufgabe löst, ist in Patentanspruch 1
angegeben.It is based on this known prior art
Object of the present invention, a two-stroke V-engine
specify the one hand a higher pre-compression and
on the other hand, weight and volume savings are possible.
A motor that solves this problem is in
Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels näher erläutert.
- Die
Figuren 1 und 2 - zeigen in zwei Schnitten schematisch einen vorbekannten Zweizylinder Zweitakt V-Motor, und
- die
Figuren 3 und 4 - zeigen zwei schematische Schnitte eines erfindungsgemässen Motors.
- Figures 1 and 2
- schematically show in two sections a previously known two-cylinder two-stroke V-engine, and
- Figures 3 and 4
- show two schematic sections of an engine according to the invention.
Die Figuren 1 und 2 zeigen schematisch einen Zweitakt V-Motor
1 nach Stand der Technik mit den zwei Kolben 2 und 3,
die an je einer Pleuelstange 4 und 5 befestigt sind, einen
der beiden Einlässe 6 und die beiden Auslässe 7 und 8. Aus
der Zeichnung geht hervor, dass die Pleuelstangen einteilig
gefertigt sind, wie dies insbesondere bei Rennmaschinen aus
Gewichtsgründen üblich ist. Bei diesem Motor handelt es
sich um einen kurbelkastengespülten Motor, wobei das
Kraftstoff-Luftgemisch im Kurbelgehäuse komprimiert wird
und dann in die Zylinder 9, bzw. 10 gelangt. Figures 1 and 2 show schematically a two-stroke V-
Aus Figur 1 ist ersichtlich, dass die beiden Kolben nicht
gleichzeitig arbeiten, d. h. der eine Kolben 2 befindet
sich in einem Arbeitstakt, in einer Zwischenstellung und
der Kolben 3 in der oberen Totpunktstellung.From Figure 1 it can be seen that the two pistons are not
work at the same time, d. H. which is a
In Figur 2 erkennt man zudem die gemeinsame Kurbelwelle 11
sowie die Kurbelwangenpaare 12 und 13 und den Kraftabtrieb
14. Man erkennt ferner aus Figur 2, dass die beiden Kurbelgehäuseräume
16 und 17 voneinander getrennt und auf der
Kurbelwelle über Wellendichtungen 15 abgedichtet sind. Bei
dieser Konstruktion sind drei Kurbelwellen-Hauptlager 24
notwendig. Ferner erkennt man die üblichen Kolbenringe 18
sowie die Zündkerzen 19. Ausserdem sind in Figur 1 die
beiden Zylindergehäuse 20 und 21 sowie das Kurbelkastengehäuse
22 und ein Kurbelzapfen 23 ersichtlich.The
In den Figuren 3 und 4 ist ein Ausführungsbeispiel eines
erfindungsgemässen Rennmotors mit einer Zweizylindereinheit
dargestellt. Man erkennt den Motor 30 mit den beiden
Zylindergehäusen 31 und 32 sowie das Kurbelkastengehäuse
33. In den Zylindergehäusen befindet sich der Kolben 34
bzw. 35, die in den Zylindern 36 bzw. 37 laufen und an den,
wie in Figur 3 ersichtlich, einteilige Pleuelstangen 38 und
39 angeordnet sind. Die beiden Pleuelstangen sind mit der
gemeinsamen Kurbelwelle 48 über die an sich bekannten
Elemente wie Kurbelzapfen 49 und Abkröpfungen verbunden.In Figures 3 and 4 is an embodiment of a
Racing engine according to the invention with a two-cylinder unit
shown. You can see the
Im Unterschied zu dem vorbekannten Zweitaktmotor gemäss den
Figuren 1 und 2 besitzt diese Zweizylindermotor-Einheit
einen gemeinsamen Kurbelgehäuseraum 40. Dies bedeutet,
dass es nur einen gemeinsamen Einlass 41 und die beiden
Auslässe 42 und 43 gibt, und v. a., dass es keine Abtrennung
im Kurbelgehäuseraum mehr gibt und nur drei Kurbelwangen
44 vorhanden sind. Die mittlere Dichtung und das
mittlere Hauptlager entfallen und es sind nur noch insgesamt
zwei Wellendichtungen 45 sowie zwei Kurbelwellen-Hauptlager
50 vorhanden. Ferner erkennt man den Abtrieb 51.In contrast to the previously known two-stroke engine according to the
Figures 1 and 2 has this two-cylinder engine unit
a
Um diese Anordnung maximal auszunutzen, sind die beiden
Kolben derart auf der Kurbelwelle angeordnet, dass sie
gleichsinnig laufen, d. h., dass beide Kolben sich gleichzeitig
in der oberen Totpunktstellung befinden, wie in
Figur 3 dargestellt, oder gleichzeitig in der unteren Totpunktstellung.
Eine solche Kolbenanordnung ergibt eine
maximale Vorkompression, doch können in dieser Motorenanordnung
auch versetzt angeordnete Kolben verwendet werden.
Die Kolben mit den Kolbenringen 46 können an sich
gleich gearbeitet sein wie die vorbekannten Kolben. In
Figur 3 sind ferner die Zündkerzen 47 angedeutet.To make maximum use of this arrangement, the two are
Pistons arranged on the crankshaft so that they
run in the same direction, d. that is, both pistons are working simultaneously
are in the top dead center position, as in
Figure 3 shown, or simultaneously in the bottom dead center position.
Such a piston arrangement gives one
maximum pre-compression, but can in this engine arrangement
also offset pistons can be used.
The pistons with the
Durch die in den Figuren 3 und 4 offenbarte Anordnung wird, bei gleichem Zylinderinhalt, ein insgesamt kleinerer Kurbelgehäuseraum erzielt, womit durch die gleichsinnige Bewegung der beiden Kolben eine insgesamt höhere Vor-Kompressionsrate erzeugt wird, denn beim Abwärtsbewegen der Kolben wirken beide Kolben auf das im Kurbelkastengehäuseraum befindliche Kraftstoff-Luftgemisch.Due to the arrangement disclosed in FIGS. 3 and 4, with the same cylinder content, a smaller overall Achieved crankcase space, with what by the same Movement of the two pistons has a higher overall pre-compression rate is generated because when moving the Pistons act on both pistons in the crankcase housing area fuel-air mixture.
Beim vorliegenden Ausführungsbeispiel handelt es sich um einen Zweizylinder Zweitakt V-Motor, doch kann das oben offenbarte Prinzip selbstverständlich auch, mit Anpassungen, für einen Motor mit mehr als eine Zweizylinder-Einheit übernommen werden, insbesondere für einen Vierzylinder-Motor.The present exemplary embodiment is a two-cylinder two-stroke V-engine, but can do that above principle disclosed, of course, with adjustments, for an engine with more than one two-cylinder unit be taken over, especially for a four-cylinder engine.
Ein weiterer Vorteil ergibt sich daraus, dass durch den gemeinsamen Kurbelgehäuseraum dieser kompakter gebaut werden kann, da eine Abtrennung mit Abdichtung und Hauptlager dazwischen entfällt, wodurch ein insgesamt schmälerer Motor entsteht und Gewichtseinsparungen möglich sind. Diese Vorteile zusammen ergeben bei gleichem Hubraum gegenüber dem Stand der Technik einen Rennmotor mit kleineren Abmessungen und einem geringerem Gewicht sowie höherer Leistung.Another advantage results from the fact that common crankcase space this can be built more compact can, as a partition with seal and main bearing in between is omitted, resulting in an overall narrower engine arises and weight savings are possible. These advantages together result in the same displacement compared to State of the art a racing engine with smaller dimensions and a lower weight and higher performance.
Claims (3)
- Two-stroke V engine comprising at least one unit consisting of two cylinders comprising two pistons which are each mounted on an undivided connecting rod and act upon a common crankshaft, characterised in that the two cylinders (36, 37) have a common, scavenged crankcase space (40) and the crankshaft (48) is externally sealed in the crankcase space (40) by two shaft seals (45) only and comprises two crankshaft main bearings (50) and three crank webs (44) only.
- Motor unit according to claim 1, characterised in that the pistons (34, 35) are connected to the crankshaft (48) in such a manner that their movements are essentially in the same direction.
- Motor unit according to claim 1 or 2, characterised in that it comprises one inlet (41) and two outlets (42, 43).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH278395 | 1995-10-03 | ||
CH278395 | 1995-10-03 | ||
CH2783/95 | 1995-10-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0767300A1 EP0767300A1 (en) | 1997-04-09 |
EP0767300B1 true EP0767300B1 (en) | 2000-03-22 |
Family
ID=4241501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960810631 Expired - Lifetime EP0767300B1 (en) | 1995-10-03 | 1996-09-25 | Two stroke V-engine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0767300B1 (en) |
DE (1) | DE59604747D1 (en) |
ES (1) | ES2144719T3 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB185181A (en) * | 1921-05-25 | 1922-08-25 | Pedro Sorriguieta E Ibarra | A two cycle internal combustion engine having one or more pairs of opposed cylinders |
DE672964C (en) * | 1936-03-10 | 1939-03-13 | Else Gockerell | Multi-cylinder two-stroke internal combustion engine with V-shaped cylinders |
JP2730997B2 (en) * | 1989-10-31 | 1998-03-25 | ヤマハ発動機株式会社 | Motorcycle equipped with V-type two-cycle engine |
-
1996
- 1996-09-25 DE DE59604747T patent/DE59604747D1/en not_active Expired - Fee Related
- 1996-09-25 ES ES96810631T patent/ES2144719T3/en not_active Expired - Lifetime
- 1996-09-25 EP EP19960810631 patent/EP0767300B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59604747D1 (en) | 2000-04-27 |
EP0767300A1 (en) | 1997-04-09 |
ES2144719T3 (en) | 2000-06-16 |
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