CH97306A

CH97306A - Two-stroke internal combustion engine.

Info

Publication number: CH97306A
Authority: CH
Inventors: Santagiuliana Alberto
Original assignee: Santagiuliana Alberto
Priority date: 1920-08-25
Filing date: 1921-04-11
Publication date: 1923-01-02

Description

llloteur ä explosions ä deux temps. La presente invention a pour objet un m.oteur ä explosions ä deux temps dans lequel la quantite de melange prenant Part ä 1'ex- plosion peut etre reglee de la faf,on voulue-en dechargeant dans 1e carter une Portion du melange initialement introduit dans 1e cy- lindre. Two-stroke explosion engine. The object of the present invention is a two-stroke spark-ignition engine in which the quantity of mixture taking part in the explosion can be adjusted as desired-by discharging into the crankcase a portion of the mixture initially introduced. in the 1st cylinder.

Suivant 1'invention, chaque cylindre du moteur est en communication avec 1e carter ä travers au moins une lumi.ere d'admission destinee ä etre decouverte par 1e piston ä la fin de sa. course motrice et ä travers au moins une ouverture menagee Jans 1e fond du cy- lindre et reglee par une soupape commanclee. According to the invention, each cylinder of the engine is in communication with the crankcase through at least one intake port intended to be uncovered by the piston at the end of its stroke. driving stroke and through at least one opening in the bottom of the cylinder and regulated by a controlled valve.

Sur 1e dessin annexe est montree, ä titre d'exemple, une forme de realisation de 1'in- vention, et fig. 1 est une coupe, suivant Faxe d'un cylindre, d'un moteur suivant 1'invention; fig. 2 est une vue de cöte du moteur; fig. 3 est la vue frontale, du cöte interne, du couvercle qui forme 1e carter vis- ä-vis de 1'extremite de 1'arbre moteur, ce couvercle comportant los organes de com- mande, ef fig. 4 est une vue de cöte de ce couvercle. In the accompanying drawing there is shown, by way of example, an embodiment of the invention, and FIG. 1 is a section, along the axis of a cylinder, of an engine according to the invention; fig. 2 is a side view of the engine; fig. 3 is the front view, from the internal side, of the cover which forms the casing vis-a-vis the end of the motor shaft, this cover comprising the control members, and fig. 4 is a side view of this cover.

A fig. 1, 1 est 1e cylindre du moteur oü se deplace 1e piston 2 qui est couple par la bielle 3 ä 1a manivelle 4 solidaire de 1'arbre moteur. Le cylindre 1 comporte, comme d'habitude, des lumieres de decharge 5 et d'admission 6, ces dernieres s'ouvrant Jans 1e conduit 7 qui aboutit ä la cavite du car- ter B. A fig. 1, 1 is the cylinder of the engine where the piston 2 moves, which is coupled by the connecting rod 3 to the crank 4 integral with the motor shaft. Cylinder 1 has, as usual, discharge 5 and intake 6 ports, the latter opening in conduit 7 which leads to crankcase cavity B.

Le conduit 7 se prolonge en 7' et<B>11</B> abou- tit ä une autre ouverture, 9 du cy lindre, me- nag6e Jans son fond et reglee par une sou- pape 10. Celle-ei est maintenue en Position de fermeture par un ressort 11 et olle peut eire ouverte par un mecanisme ordinaire de commande constitue, par exemple, par un culbuteur 12 et par une tige 13, mobile axialement dans un guide 14 et dont 1'extre- mit6 appuie constamment sur un organe en train6 en rotation par 1'arbre moteur et ponvant etre regle de 1'exterieur de fa@on tolle' ä laisser la soupape 10 immobile ou ä provoquer un soulevement plus ou moins im- portant de celle-ei Pendant la course de cömpression du piston. The duct 7 is extended at 7' and leads to another opening, 9 of the cylinder, provided at its bottom and regulated by a valve 10. This is maintained in the closed position by a spring 11 and it can be opened by an ordinary control mechanism constituted, for example, by a rocker arm 12 and by a rod 13, axially movable in a guide 14 and whose extremity constantly presses on a member rotating by the drive shaft and capable of being adjusted from the outside in such a way as to leave the valve 10 stationary or to cause a more or less significant lifting of the latter during the travel of the piston compression.

Dans 1'exemple represente, ce mecanisme comprend un clisque 15 pivote, coaxialement ä Farbre du moteur, dans 1e couvercle 8' du In the example shown, this mechanism comprises a flange 15 pivoted, coaxially with the motor shaft, in the cover 8' of the

carter e et solidaire d'un levier 16 pour sa nianc-uvre, ce disque portant pivotee en Po sition excentrk, en 17, une pike 18 Sur un röte de laquelle est piv ote un galet 19 destine ä appuy er Sur la came ZO solida.ire de 1'ar bre moteur. casing and integral with a lever 16 for its nianc-work, this disc bearing pivoted in an eccentric position, at 17, a pike 18 On a röte of which is pivoted a roller 19 intended to press on the cam ZO solida .ire of the motor shaft.

Par consequent, chaque fois quo 1e galet 19 parcourt los rampes de la. came `?0, la piece 18 oscille autour de son pivot 17 kaut rarnen('e ensuite dans sa Position normale par un ressort 18' appuyant contre la goupilie 15' du disque 15. Therefore, each time the first roller 19 travels the ramps of the. cam `?0, the piece 18 oscillates around its pivot 17 kaut rarnen ('e then in its normal position by a spring 18' pressing against the pin 15' of the disc 15.

horsque la Position du disque 15 est teile qu,- Faxe de la tige 13, dopt l'extremite appuie Sur la couronne de la pike 18, passe par Faxe de rotation 17 de rette Piere, 1'oscil lation de la. pike 18 ne se transmet pas ä 1a. tige 13. Par contre rette oscilhition se Iransinet ä la tige 13 en Proportion de plus en plus importante au für et ie mesure quo 1e point de contaet de la tige 13 Sur la piece 18 s'eloigne du centre de son oscillation. horsque the Position of the disc 15 is teile qu, - Faxe of the rod 13, dopt the extremity presses on the crown of the pike 18, passes by Faxe of rotation 17 of rette Piere, the oscillation of the. pike 18 does not pass to 1a. rod 13. On the other hand, this oscillation increases with rod 13 in increasing proportion as the first point of contact of rod 13 on part 18 moves away from the center of its oscillation.

Par la manmuvre du levier 1.6, 1e disque 15 et ses organes annexes peuvent clone eire amenes en Position tolle quo la soupape 10 demeure constamment fermee, dans lequel cis 1e moteur fonetionne de la faVon habi tuelle, ou bien an peut faire en Sorte quo la soupape 10 demeure ouverte Pendant une Portion plus ou moins longue de la course de compression du piston. Il s'ensuit quo Pen dant rette Portion de course 1e piston se li m.ite ä. pousser au devant de lui 1e melange contenu Jans 1e cylindre en 1e refoulant, ä travers la conduite 9, 7', 7, dann le carter B. By maneuvering the lever 1.6, the first disc 15 and its ancillary members can be brought into the position where the valve 10 remains constantly closed, in which the motor operates in the usual way, or else it can ensure that the valve 10 remains open during a more or less long portion of the compression stroke of the piston. It follows quo Pen dant rette Portion of race the first piston is li m.ite ä. push ahead of it the mixture contained in the cylinder by pushing it back, through the pipe 9, 7', 7, into the casing B.

Pa.i, consequent, lörs de 1'admission, ä tra vers los lumieres 6 an introduit toujours dann 1e cylindre une cylindree comp16te de m6 lange frais qui provoque la decharge la. plus complke possible des gaz briiles ä travers los lumieres 5, mais, suivant 1a. Position de 1'organe de commande, 1e volume de nielange Pa.i, therefore, at the time of admission, through the openings 6 an always introduces into the cylinder a complete cylinder of fresh mixture which causes the discharge there. as complete as possible of the burnt gases through the ports 5, but, according to 1a. Position of the control device, the 1st volume of nielange

qui est coniprini6 et qui prendra Part ä 1'ex plosion Sera reduit Jans la Proportion voulue, ,de Sorte qu'il est possible de realiser tont regime de inarche du moteur, nienic it une vitesse tres bisse. which is ignited and which will take part in the explosion will be reduced to the desired proportion, so that it is possible to achieve all engine running speeds, although at a very low speed.

Le dispositi_f de commande peut ötre etabli de fa4on differente de Gelle representee, etant seulenient necessaire qü il permette ou de laisser stationnaire 1a. soupape 10 ou de lui faire accomplir une course de l.oiigticur voulue ä cliaque course de coinpression du piston. The control device can be established in a different way from that represented, being only necessary that it allows or leaves stationary 1a. valve 10 or to cause it to complete a desired stroke at each compression stroke of the piston.

Claims

CLAIM Engine ä, two-stroke explosions, characterized in that each cylinder is in communication corner with the first crankcase ä. through at least one inlet port intended to be covered by the piston at the end of its driving stroke, and through at least one opening in the bottom of the cylinder and regulated by a controlled valve.

SUB-CLAIMS: 1 Engine according to claim, caraete ris6 quo 1'ouverture d'admission and 1'ouverture m6nagee On the bottom of the cylinder end in a single conduit constamin.ent in communiea.tion avee ca.rter. `? Engine according to 1a. claim.tion, character,@ri#e in ee quo la. valve to regulate the opening provided in the first bottom of the cylinder is controlled by a member set in oscillation by the motor shaft and on which rests a rod aetionnant 1a valve, the first point of contact of this rod with 1 the oscillating member can be modified with respect to the center of oscillation thereof.