EP0767300B1 - Moteur en V à deux temps - Google Patents

Moteur en V à deux temps Download PDF

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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
Application number
EP19960810631
Other languages
German (de)
English (en)
Other versions
EP0767300A1 (fr
Inventor
Urs Wenger
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.)
Wenko AG Burgdorf
Original Assignee
Wenko AG Burgdorf
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 Wenko AG Burgdorf filed Critical Wenko AG Burgdorf
Publication of EP0767300A1 publication Critical patent/EP0767300A1/fr
Application granted granted Critical
Publication of EP0767300B1 publication Critical patent/EP0767300B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)

Claims (3)

  1. Moteur à deux temps en V, comprenant au moins une unité à deux cylindres qui comporte deux pistons montés chacun sur une bielle indivisée et agissant sur un vilebrequin commun, caractérisé en ce que les deux cylindres (36, 37) possèdent un carter (40) commun et balayé, et que le vilebrequin (48) est extérieurement étanché dans ledit espace de carter (40) par deux garnitures d'arbre (45) seulement et ne comporte que deux paliers de vilebrequin principaux (50) et trois flasques de manivelle (44).
  2. Unité motrice selon la revendication 1, caractérisée en ce que les pistons (34, 35) sont reliés au vilebrequin (48) de telle manière que leur mouvement est essentiellement de même sens.
  3. Unité motrice selon la revendication 1 ou 2, caractérisée en ce qu'elle présente une admission (41) et deux échappements (42, 43).
EP19960810631 1995-10-03 1996-09-25 Moteur en V à deux temps Expired - Lifetime EP0767300B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2783/95 1995-10-03
CH278395 1995-10-03
CH278395 1995-10-03

Publications (2)

Publication Number Publication Date
EP0767300A1 EP0767300A1 (fr) 1997-04-09
EP0767300B1 true EP0767300B1 (fr) 2000-03-22

Family

ID=4241501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960810631 Expired - Lifetime EP0767300B1 (fr) 1995-10-03 1996-09-25 Moteur en V à deux temps

Country Status (3)

Country Link
EP (1) EP0767300B1 (fr)
DE (1) DE59604747D1 (fr)
ES (1) ES2144719T3 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
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 (de) * 1936-03-10 1939-03-13 Else Gockerell Mehrzylinderzweitaktbrennkraftmaschine mit V-foermig angeordneten Zylindern
JP2730997B2 (ja) * 1989-10-31 1998-03-25 ヤマハ発動機株式会社 Ｖ型２サイクルエンジンを搭載した自動二輪車

Also Published As

Publication number Publication date
DE59604747D1 (de) 2000-04-27
EP0767300A1 (fr) 1997-04-09
ES2144719T3 (es) 2000-06-16

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