FR2683857A1 - Combustion engine with three connecting rods per piston - Google Patents
Combustion engine with three connecting rods per piston Download PDFInfo
- Publication number
- FR2683857A1 FR2683857A1 FR9114466A FR9114466A FR2683857A1 FR 2683857 A1 FR2683857 A1 FR 2683857A1 FR 9114466 A FR9114466 A FR 9114466A FR 9114466 A FR9114466 A FR 9114466A FR 2683857 A1 FR2683857 A1 FR 2683857A1
- Authority
- FR
- France
- Prior art keywords
- piston
- connecting rods
- connecting rod
- crankshafts
- chamber
- 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- Withdrawn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
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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/24—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type
- F02B75/246—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type with only one crankshaft of the "pancake" type, e.g. pairs of connecting rods attached to common crankshaft bearing
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- 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
- F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
- F01B9/02—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with crankshaft
- F01B9/026—Rigid connections between piston and rod; Oscillating pistons
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- 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
- F02B75/06—Engines with means for equalising torque
- F02B75/065—Engines with means for equalising torque with double connecting rods or crankshafts
Abstract
Description
La présente invention concerne les moteurs thermiques à pistons animés d'un mouvement alternatif à deux ou quatre temps mais est particulièrement adaptée aux deux temps. The present invention relates to internal combustion piston engines with a reciprocating two or four stroke movement, but is particularly suitable for two strokes.
Les moteurs thermiques ont généralement leurs pistons actionnés par une bielle dont le pied de bielle est accouplé au piston, lequel a un mouvement rectiligne de va-et-vient à l'intérieur du cylindre, et une tête de bielle accouplée au maneton de la manivelle d'un vilebrequin, lequel a un mouvement rotatif. Ainsi le mouvement particulier de la bielle exige un débattement important à la base du cylindre. Heat engines generally have their pistons actuated by a connecting rod, the connecting rod foot of which is coupled to the piston, which has a rectilinear reciprocating movement inside the cylinder, and a connecting rod head coupled to the crank pin of the crank. a crankshaft, which has a rotary movement. Thus the particular movement of the connecting rod requires significant clearance at the base of the cylinder.
I1 en va de même dans le cas où le piston est accouplé à deux bielles jumelles actionnant chacune un vilebrequin. I1 is the same in the case where the piston is coupled to two twin connecting rods each actuating a crankshaft.
D'autre part les moteurs à deux temps souffrent dlun mauvais remplissage de la chambre de combustion en air ou en mélange du fait que l'admission se produit pratiquement simultanément à l'expulsion des gaz brûlés
Le dispositif suivant l'invention permet de remédier à ces inconvénients. I1 comporte en effet un système de trois bielles actionnant deux vilebrequins jumeaux tournant en sens inverse. La première de ces bielles (1) a son pied fixé au piston et sa tête fixée aux pieds des deux autres bielles (2, 3) qui ont elles-mêmes leur tête accouplée au maneton de leur vilebrequin respectif (6, 7).Ces vilebrequins (6, 7) classiques peuvent être communs à un ou plusieurs pistons, et ont pour particularités d'avoir leur axe disposé de façon symétrique de chaque coté de l'axe déplacement du ou des pistons (8) et donc de la première bielle (1). Ces vilebrequins seront synchronisés entre eux par des roues dentées en bout d'arbres et serviront l'un ou l'autre dg d'arbre de sortie. Ceux-ci tournant en sens inverse le choix se fera en fonction du sens de rotation désiré.On the other hand, two-stroke engines suffer from poor filling of the combustion chamber with air or in mixture because the admission occurs practically simultaneously with the expulsion of the burnt gases.
The device according to the invention overcomes these drawbacks. I1 indeed comprises a system of three connecting rods actuating two twin crankshafts rotating in opposite directions. The first of these connecting rods (1) has its foot fixed to the piston and its head fixed to the feet of the two other connecting rods (2, 3) which themselves have their head coupled to the crankpin of their respective crankshaft (6, 7). conventional crankshafts (6, 7) can be common to one or more pistons, and have the particularity of having their axis disposed symmetrically on each side of the displacement axis of the piston (s) (8) and therefore of the first connecting rod (1). These crankshafts will be synchronized with each other by toothed wheels at the end of the shafts and will serve one or the other of the output shafts. These rotating in the opposite direction the choice will be made according to the desired direction of rotation.
Ce système a pour première conséquence que les forces latérales engendrées par l'oblicité des bielles du fait de la rotation de leur tête, se trouvent annulées l'une par l'autre au niveau de leur accouplement commun avec la première bielle
Ainsi le piston et la première bielle ont un mouvement parfaitement rectiligne sans risque d'usure latérale anormale comme c'est le cas dans les moteurs classiques à une seule bielle et un seul vilebrequin.The primary consequence of this system is that the lateral forces generated by the obliquity of the connecting rods due to the rotation of their head, are canceled out by one another at their joint coupling with the first connecting rod.
Thus the piston and the first connecting rod have a perfectly rectilinear movement without risk of abnormal lateral wear as is the case in conventional engines with a single connecting rod and a single crankshaft.
D'autre part le mouvement alternatif du piston n'est plus régulier par rapport à la rotation des vilebrequins c 'est à dire que la descente du piston et sa remontée s'effectue suivant un cycle non symétrique de 1400 et 2200 par exemple ceci en fonction de l'écartement des deux vilebrequins, de la longueur de leur manivelle, de la longueur des bielles (2, 3) ainsi que du sens de rotation choisi. Cette particularité permet une meilleure exploitation de la détente des gaz brûlés, une augmentation du couple sur les vilebrequins du fait de la direction des forces engendrées par les bielles.On the other hand the reciprocating movement of the piston is no longer regular with respect to the rotation of the crankshafts, that is to say that the descent of the piston and its ascent takes place according to a non-symmetrical cycle of 1400 and 2200 for example this function of the spacing of the two crankshafts, the length of their crank, the length of the connecting rods (2, 3) as well as the direction of rotation chosen. This feature allows better exploitation of the expansion of the burnt gases, an increase in the torque on the crankshafts due to the direction of the forces generated by the connecting rods.
Enfin le mouvement parfaitement rectiligne de cette première bielle (l) en tête et pied, permet d'obturer la base du cylindre par une paroi (4) afin de créer sous le piston une chambre d'admission et de précompression (5)
Ainsi l'air ou le mélange aspiré par la montée du piston sous celui-ci, dans la chambre (5) sera précomprimé et vigoureusement soufflé dans la chambre de combustion (11) supérieure assurant ainsi un remplissage parfait de celle-ci tout en expulsant les gaz brûlés.Finally, the perfectly rectilinear movement of this first connecting rod (l) at the top and bottom, allows the base of the cylinder to be closed by a wall (4) in order to create an intake and precompression chamber (5) under the piston.
Thus the air or the mixture sucked by the rise of the piston under it, in the chamber (5) will be precompressed and vigorously blown into the upper combustion chamber (11) thus ensuring a perfect filling thereof while expelling the burnt gases.
Cette paroi (4) à la base du cylindre sera donc percée d'un trou permettant le passage de; la première bielle. Cette première bielle (1) devra donc être parfaitement rectiligne, lisse, de section cylindrique ou ovale afin de maintenir une étanchéité correcte à cette chambre de remplissage (5).This wall (4) at the base of the cylinder will therefore be pierced with a hole allowing the passage of; the first connecting rod. This first connecting rod (1) must therefore be perfectly rectilinear, smooth, of cylindrical or oval section in order to maintain a correct seal at this filling chamber (5).
Cette paroi (4) devra également permettre le positionnement de soupapes commandées ou de simples clapets (9) destinés à assurer l'admission de l'air carburé ou non, dans la chambre de précompression (5) sous le piston (8)
Cette paroi (4) devra enfin permettre le départ de l'air à destination de la chambre de combustion (11) au travers d'un canal (10) . Ce canal (10) ouvre dans la chambre de combustion (ll) juste au-dessus du piston lorsque celui-ci est en position point mort bas . Ce canal doit permettre le positionnement d'un gicleur ou d'un injecteur de carburant si l'on choisit d'admettre de l'air pur non carburé dans la chambre de remplissage (5) ceci dans le cas évidemment où le moteur ne comporte pas déjà un injecteur en lieu et place de la bougie d'allumage (14).This wall (4) should also allow positioning of controlled valves or simple valves (9) intended to ensure the admission of air, carbureted or not, in the precompression chamber (5) under the piston (8)
This wall (4) should finally allow the departure of air to the combustion chamber (11) through a channel (10). This channel (10) opens in the combustion chamber (ll) just above the piston when the latter is in the bottom neutral position. This channel must allow the positioning of a nozzle or a fuel injector if one chooses to admit pure non-carburized air into the filling chamber (5) this in the case obviously where the engine does not include not already an injector in place of the spark plug (14).
Afin que l'air ou le mélange admis dans la chambre (5) sous le piston ne s'échappe pas avec les gaz brûlés ou que ceux-ci ne soient aspirés par la remontée du piston, la lumière d'échappement doit être soit équipée d'une soupape commandée soit obturée par un tiroir (12) solidaire du piston et coulissant dans un orifice adapté dans la paroi (4) à la base du cylindre
Ce dispositif à trois bielles et deux vilebrequins peut être installé de plusieurs manières: 1) de façon classique avec les bielles (2, 3) poussant sur les manetons des vilebrequins lors de la détente des gaz de la combustion et ce, quel que soit le sens de la rotation des vilebrequins (fig 1).So that the air or the mixture admitted into the chamber (5) under the piston does not escape with the burnt gases or that these are not sucked by the ascent of the piston, the exhaust light must be equipped a controlled valve is closed by a drawer (12) integral with the piston and sliding in a suitable opening in the wall (4) at the base of the cylinder
This device with three connecting rods and two crankshafts can be installed in several ways: 1) in a conventional manner with the connecting rods (2, 3) pushing on the crankshaft crank pins during the expansion of the combustion gases and this, whatever the direction of rotation of the crankshafts (fig 1).
2) avec les vilebrequins positionnés près de la base du cylindre, la première bielle étant un peu plus longue, les deux autres bielles travailleront en tirant sur les manetons lors de la détente des gaz (fig 2).2) with the crankshafts positioned near the base of the cylinder, the first connecting rod being a little longer, the other two connecting rods will work by pulling on the crankpins when the gases are released (fig 2).
3) on constate que ces deux montages peuvent s'associer sans problèmes, et qu'il est possible d'installer un piston de chaque côté du dispositif (fig 3). Toutefois le deuxième piston sera actionné par les mêmes vilebrequins qui pour lui tourneront en sens inverse. Les deux pistons auront donc des cycles différents pour ce qui concerne les temps de compression et de détente. Ceci peut être très intéressant dans de nombreux cas, en particulier si les pistons inversés ne sont que des compresseurs.3) it can be seen that these two assemblies can be combined without problems, and that it is possible to install a piston on each side of the device (fig 3). However the second piston will be actuated by the same crankshafts which for it will turn in opposite direction. The two pistons will therefore have different cycles with regard to the compression and expansion times. This can be very interesting in many cases, especially if the inverted pistons are only compressors.
4) si les deux bielles (2, 3) ont une longueur égale à la distance séparant l'axe du vilebrequin à l'axe de déplacement des pistons, augmentée de la longueur de la manivelle, la première bielle passera librement entre les deux vilebrequins jusqu'au point symétrique du point mort haut précédent. Ce montage permet de doubler la course de cette première bielle donc des pistons situés à chaque extrémité de celle-ci, ce qui offre de nouvelles possibilités d'exploitation du moteur.4) if the two connecting rods (2, 3) have a length equal to the distance separating the axis of the crankshaft from the axis of displacement of the pistons, increased by the length of the crank, the first connecting rod will pass freely between the two crankshafts to the symmetrical point of the previous top dead center. This arrangement makes it possible to double the travel of this first connecting rod, therefore of the pistons located at each end thereof, which offers new possibilities for operating the engine.
Ce dispositif à trois bielles, deux vilebrequins et chambre de précompression sous le piston, permet une meilleure exploitation du cycle à deux temps puisqu'il permet d'une part d'améliorer considérablement le remplissage de la chambre de combustion, d'autre part de jouer avec les différences du cycle entre les temps de compression et de détente suivant le type de montage, le sens de rotation des vilebrequins, leur diamètre et leur écartement. This device with three connecting rods, two crankshafts and precompression chamber under the piston, allows a better exploitation of the two-stroke cycle since it allows on the one hand to considerably improve the filling of the combustion chamber, on the other hand play with the differences in the cycle between compression and expansion times depending on the type of assembly, the direction of rotation of the crankshafts, their diameter and their spacing.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9114466A FR2683857A1 (en) | 1991-11-18 | 1991-11-18 | Combustion engine with three connecting rods per piston |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9114466A FR2683857A1 (en) | 1991-11-18 | 1991-11-18 | Combustion engine with three connecting rods per piston |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2683857A1 true FR2683857A1 (en) | 1993-05-21 |
Family
ID=9419257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9114466A Withdrawn FR2683857A1 (en) | 1991-11-18 | 1991-11-18 | Combustion engine with three connecting rods per piston |
Country Status (1)
Country | Link |
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FR (1) | FR2683857A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004016203A1 (en) * | 2004-04-01 | 2005-10-27 | Rolf Prillwitz | Low-speed marine diesel engine with two contra-rotating crankshafts driven by a single connecting rod |
WO2008019826A1 (en) * | 2006-08-16 | 2008-02-21 | Peter Pelz | Internal combustion engine having integrated supercharging |
EP1934446A1 (en) * | 2005-10-13 | 2008-06-25 | Thomas J. Dougherty | Engine having axiallyy opposed cylinders |
FR2955149A1 (en) * | 2010-01-14 | 2011-07-15 | Gerard Cerdan | Four stroke or two stroke internal combustion heat engine i.e. diesel engine, for e.g. aircraft, has rods including feet provided on axle of piston, where rods are actuated by piston descending in symmetric movement between crankshafts |
DE102013000092A1 (en) * | 2013-01-08 | 2014-07-10 | Helmut Obieglo | Lifting piston gearbox for combustion engine, has axis of rotation, output element for torque reduction- or conduction, piston guided in cylinder, and eccentricity, at which connecting rod is articulated |
-
1991
- 1991-11-18 FR FR9114466A patent/FR2683857A1/en not_active Withdrawn
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004016203A1 (en) * | 2004-04-01 | 2005-10-27 | Rolf Prillwitz | Low-speed marine diesel engine with two contra-rotating crankshafts driven by a single connecting rod |
EP1934446A1 (en) * | 2005-10-13 | 2008-06-25 | Thomas J. Dougherty | Engine having axiallyy opposed cylinders |
EP1934446A4 (en) * | 2005-10-13 | 2012-01-25 | Thomas J Dougherty | Engine having axiallyy opposed cylinders |
WO2008019826A1 (en) * | 2006-08-16 | 2008-02-21 | Peter Pelz | Internal combustion engine having integrated supercharging |
EP2241736A3 (en) * | 2006-08-16 | 2011-06-22 | Peter Pelz | Internal combustion engine having integrated supercharging |
FR2955149A1 (en) * | 2010-01-14 | 2011-07-15 | Gerard Cerdan | Four stroke or two stroke internal combustion heat engine i.e. diesel engine, for e.g. aircraft, has rods including feet provided on axle of piston, where rods are actuated by piston descending in symmetric movement between crankshafts |
DE102013000092A1 (en) * | 2013-01-08 | 2014-07-10 | Helmut Obieglo | Lifting piston gearbox for combustion engine, has axis of rotation, output element for torque reduction- or conduction, piston guided in cylinder, and eccentricity, at which connecting rod is articulated |
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Legal Events
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ST | Notification of lapse |