CH108784A

CH108784A - Carburetor for internal combustion engines.

Info

Publication number: CH108784A
Authority: CH
Inventors: Botta Ferruccio
Original assignee: Botta Ferruccio
Priority date: 1923-07-02
Filing date: 1924-06-24
Publication date: 1925-02-02

Description

Carburateur pour moteurs ä, explosions. L'irivention a trait ä un carburateur pour moteurs ä explosions du genre de ceux Jans lesquels 1e carburant est fourni du reservoir au gicleur ii, travers un Passage calibr6 noye. Ce carburateur est earacteris6 en ce que 1'espace coinpris entre 1e Passage susdit et la base du gicleur- est en communication avec un conduit en _communication avec Patmosphere de fagon qu'au-dessous d'un r6- gime de vitesse determin6 ce conduit est plein de combustible, tandis qu'au-dessus de ce regime il se vide dans 1e gicleur, 1e car- burant s'ecoulant alors ä travers 1e Passage par gravite et sann etre aspire. Carburettor for ä engines, explosions. The invention relates to a carburettor for spark-ignition engines of the kind in which the fuel is supplied from the tank to the nozzle ii, through a calibrated drowned passage. This carburettor is characterized in that the space comprised between the aforesaid passage and the base of the jet is in communication with a duct in communication with the atmosphere so that below a determined speed this duct is full of fuel, while above this rate it empties into the nozzle, the fuel then flowing through the passage by gravity and not being sucked in.

Sur 1e dessin annexe est montre, ä eitre d'exemple, en coupe axiale, un carburateur selon Pinvention. In the accompanying drawing is shown, by way of example, in axial section, a carburettor according to the invention.

1 est la chambre de carburation compor- tant, comme d'habitude, Petrangleur 2 et reglee par une soupape 3 ä Papillon. 1 is the carburation chamber comprising, as usual, a throttle valve 2 and regulated by a butterfly valve 3.

Dans la region la plus etroite de 1'6tran- gleur 2 d6bouche 1e gicleur 4 loge ä Pinte- rieur d'un manchon 5 dont la base est en communication avec 1'exterieur ä, travers un conduit 6'. A la base du gicleur 4 sont menag6s des trous 4' qui etablissent la communication avec une Borge 19 ainsi qu'avec un conduit 12'; celui-ei communique, dune Part, ä tra vers une jauge 7.0, avec un puits 9 oii arrive 1e carburant contenu dass 1e reservoir 8 et, d'autre Part, ä travers des trous 16, avec un coriduit 13 qui etablit la communication avec Pair exterieur et peut Ure regle ä 1'aide d'un bouchon perce 15. In the narrowest region of the throttle 2, the nozzle 4 emerges, housed inside a sleeve 5, the base of which is in communication with the outside, through a duct 6'. At the base of the nozzle 4 are made holes 4' which establish communication with a Borge 19 as well as with a duct 12'; the latter communicates, on the one hand, through a 7.0 gauge, with a well 9 where the fuel contained in the reservoir 8 arrives and, on the other hand, through holes 16, with a conduit 13 which establishes communication with Outside air and can be adjusted with a 15 bore plug.

Les trous 16 sont menages au fond dune douille 17 qui constitue la Partie inf6rieure du conduit 13 et qui se termine, vis-ä-vis du trou de la jauge 10, par une piece coni- que 18; 1'ensemble des trous 16 constitue un Passage etrangle entre les conduits 13 et 12'. The holes 16 are provided at the bottom of a sleeve 17 which constitutes the lower part of the conduit 13 and which ends, vis-a-vis the hole of the gauge 10, by a conical piece 18; the set of holes 16 constitutes a narrow passage between the ducts 13 and 12'.

Lorsque 1e moteur est ä 1'arret ou qu'il marche 5, basse vitesse, 1e carburant occupe 1e conduit 12', 1e gicleur 4, 1e nianchon 5 et une Portion des conduits 6' et 13 oix il atteint 1e meme niveau que dans 1e recipient B. Par conAquent, Tors de la mise en marche ou lors dune brusque acceleration de la marche, 1e moteur peut aspirer cette reserve de carburant, ce qui assure de bonnes re- prises. When the engine is stopped or running at low speed, the fuel occupies line 12', nozzle 4, sleeve 5 and a portion of lines 6' and 13 where it reaches the same level as in 1st container B. Consequently, when starting or during a sudden acceleration of travel, the motor can suck up this reserve of fuel, which ensures good pick-up.

Lorsque 1e regime est normal, la conduite 13 et 1e manchon 5 sont vides de carburant car la jauge 10 donne passage ä, une quan- tit6 de liquide ä peu pres egale ä celle qui est d6bitee par 1e gicleur 4. When the engine speed is normal, the pipe 13 and the sleeve 5 are empty of fuel because the gauge 10 gives passage to a quantity of liquid approximately equal to that which is delivered by the nozzle 4.

Puisque Jans 1e conduit 12' ne peut pas se cr6er une d6pression, 6tant donnee sa communication avec 1'exterieur, ä travers 1e bouchon perfor6 15, loi-sque la conduite 13 est vide, 1e oarburant West pas appele par aspiration ä travers la jauge 10, mais il arrive dann 1e conduit 12' par effet de la Charge existant dans 1e reservoir et fournit la quantite de combustible liquide necessaire pour alimenter 1e gicleur sans que Paspiration du moteur ait une influence quelconque Sur 1e d6bit du combustible. Le combustible d6bitä daris Ces conditions par 1e gicleur 4 forme un premier m61ange avec fair parcourant 1'interstice form6 par 1e manchon 5 et ä ce m61ange s'additionne ensuite Pair de la chambre 1. Since the line 12' cannot create a depression, given its communication with the outside, through the perforated plug 15, the line 13 is empty, the fuel will not be drawn in by suction through the gauge. 10, but it arrives in the first pipe 12' by the effect of the existing load in the tank and supplies the quantity of liquid fuel necessary to supply the first nozzle without the suction of the engine having any influence whatsoever on the fuel flow rate. The fuel delivered under these conditions by the nozzle 4 forms a first mixture with air flowing through the interstice formed by the sleeve 5 and to this mixture is then added air from chamber 1.

Loraque 1e moteur manche ä une vitesse tres 61ev6e, 1'aspiration du moteur provoque un rappel plus Brand d'air ä travers la conduite 13 et cet air se melange avec 1e carburant, de Sorte que, däns 1e conduit 12', il se forme d6jä un melange d'air et de com- bustible liquide auquel s'additionne encore de Pair dans la partie sup6rieure du man- chon 5. When the engine runs at a very high speed, the suction of the engine causes more air to be drawn up through the line 13 and this air mixes with the fuel, so that in the line 12' it is formed. already a mixture of air and liquid fuel to which is still added air in the upper part of the sleeve 5.

De cette fargon, an realise automatique_ ment une correction tres exacte du melange en 6vitant une consommation excessive de carburant aux vitesses les plus 61evees, tandis que 1e d6bit du combustible est suffisant ä la manche normale et abondant Tors de la mixe en manche et des reprises. In this way, a very precise correction of the mixture is automatically carried out, avoiding excessive fuel consumption at the highest speeds, while the fuel flow is sufficient in the normal heat and abundant during the mixture in the heat and at the times. .

L'etranglement form6 par les trous 16 entre les conduites 13 et 12' sert ä r6gler 1e fonctionnement du carburateur pendant les reprises. En effet, au d6but est aspii#6e rapidement la quantite de carburant qui occupe la conduite 6', tandis que, dans 14 periode suivante, s'epuise peu ä peu la r6serv e de carburant contenue dans les conduits 13 et 12' et qui s'ajoute lentement au carburant d6bit6 par la jauge 10; dans cette p6riode, 1e debit du carburant ä travers la jauge 10 est influenc6 par 1'aspiration du moteur, car la communication du conduit 12' avee 1'ext6- rieur est empechee par la colonne de carbu- rant qui occupe encore 1e conduit 13. The restriction formed by the holes 16 between the pipes 13 and 12' serves to regulate the operation of the carburettor during the strokes. In fact, at the beginning, the quantity of fuel which occupies the conduit 6' is quickly sucked up, while, in the following period, the reserve of fuel contained in the conduits 13 and 12' is gradually depleted and which slowly adds to the fuel delivered by gauge 10; during this period, the flow of fuel through the gauge 10 is influenced by the suction of the engine, since the communication of the pipe 12' with the outside is prevented by the column of fuel which still occupies the pipe 13 .

Le carburateur decrit combine donc les conditions necessaires pour obtenii# un bon mölange ä tous les regimes du nioteur ainsi que pour permettre de passen, automatique- ment et sans interruption, dune condition ä 1'autre. The carburettor described therefore combines the conditions necessary to obtain a good mixture at all engine speeds as well as to allow automatic and uninterrupted passage from one condition to the other.

Claims

TXF FR="3" WI="73" HE="64" LX="1268" LY="924" SIZE="10" FONT="Arial"> CLAIM Carburettor for internal combustion engines, having a calibrated bore, , to regulate the exit of the liquid fuel from its reservoir, characterized in that the space comprised between this passage and the base of the nozzle is in communication with a duct in communication with the atmosphere, so that at the - Below a determined speed regime this pipe is full of fuel, while above this regime it empties into the nozzle, the fuel then flowing through the passage by gravity and without being sucked up. SUB-CLAIMS 1 Carburetor according to claim, characterized in that the nozzle is arranged in a tube in communication with the atmosphere, tobe which, below a speed of tei-min6, is filled with fuel and which, above this regime, empties and then brings to do the jet.

2 Carburettor according to claim, characterized in that the communication of the aforementioned space with the aforementioned duct open to the outside is established through calibrated holes.

3 Carburettor according to sub-claim 2, characterized in that the communication of said space with the outside is established through holes which do not open directly onto the outlet passage. of the tank, to avoid any action of the air current on the fuel jet spurting from said outlet passage.