US1771666A - Internal-combustion engine - Google Patents

Description

July 29, 1930. c. P. VALDATA Er AL 1,771,656

INTERNAL COMBUSTION ENGINE FiledV July 24, 1928 'lllllllllll Si fmf" Patented July 29,` 1930 u1fiirr-*D STATES PA'rENr VOFFICE CAMILO rnYNE'rTi vALnAmA, or Mexico, Ann traitant cnnsro GARCIA, or 'taurina` MEXICO INTERNAL-comisnsrron ENGINE Application Yinstantly a4, 192s, serial No. 295,050, ad m Mexico november `1o, 19217'.-

i pression chamber is connected by an outwardly located conduit with the combustion chamber of the cylinder, bothcharnbers being internally separated from each other by the piston.

- Referring to the drawings,

Fig. 1 is a sectional view, in side elevation, of a cylinder and crank case embodying featurcs of the invention.

Fig. 2 is a view of the same cylinder partly in section and partly in front elevation.

lig. 3 is a sectional view of the bottom plate of the cylinder.`

Referring to these drawings in detail, in which similar reference characters correi spond to similar parts throughout the sev'-v eral views, the numeral 1 indicates Va steel cylinder, the lower extremity of which is closed by a cup-shaped circular plate 2, having in its center a tubular guiding member V- 8 which extends inwardly into'the cylinder y 1 and serves as a guide for the rod/l rigidly is preferably hollow in order to reduce' itsv weight, is provided with a` fork and con-- attached to the head of the hollow piston 5. The other end of said piston rod 4, which nected by a cross pin to a short connecting rod 6, which in turn is connected to theA crank shaft 7, thelength of said piston rod 4t being calculated so that at the highest position of the piston 5 its joint with the connecting rod 6 enters from below into the tubular guide 3. 1

The upper extremity of cylinder 1 is closed by a circular plate or cover 8V of inwardly concave shape and having at its center a The improvements substan-' threaded `hole for receivingthe `spark plug' 9. The Vhead plate 8 is further provided n.

ycorresponding recesses in plates 2 andS, in

order to obtain a tight joint, and make 'the whole cylinder practicallyof one piece. The cylinder 1 is surrounded by a. plurality of cooling rings 14, the rods 12passing through holes in said rings.,` u Y At a height determined by the length of the piston 5,'the cylinder 1 is provided with two opposite openings 15 and 16, the rst of which (15) servesas in inletfor the gas into the Vcombustion chamber of the cylinder, while the second opening 16 lets escape the burntgases `through the pipe 17. A further horizontalopening 18 is provided in the side of the bottom plate 2, below the inferior edge of the cylinder 1 andon a vertical line with the opening 15, and both openings 15 and 18 are connected by an "externally located conduit 19 of substantially triangular shape with a broad base and narrow apex,

said conduit having third outlet communi-v cating with `a pipe 20through which enters the gas from thecarburetor. An automatic nen-return yvalve 21 located within this pipe 2O `permits the passage of the gas during the suction stroke and closes as soon as compression ofthe gas by the descending piston sets in. An oil feeding `pipe 22 for `lubricating the piston enters theupper and outer partof the' conduit 19.

The cylinder 1 is fastened with its bottom plate 2 by meansV of screws 23 to the crank l case 2li, the crank shaft 25 passing through the cover 26 of said `crank case. The lubricating oil isfcontained withinthe crankvcase 24 and is splashed by the revolving crank on pistonl rod 4, the Vlong tubular guiding member `3 of said rod impeding the entrance ieu substantially equal to the capacity of the ir ing'chamber and also of the compression chamber, so thata double amount of fuelV is presentin the compression chamber ofl the cylinder and the conduit than would be the case if a simple bye-pass or conduit of aV small and uniform diameter were used. The compression ncreasesin the conduit 19 until the inlet opening 15 has been treed by the` descending piston, when the compressed gas is violently injected above the piston into the combustion chamber of the cylinder, its velocity of flow being increased by the tapered shape of the conduit 19 and its small opening 15, so thatqthe said conduit acts on the principle of the vena contractu. On entering into the combustion chamber, its iow is deflected upwardlyby therecessed projection 27 on the piston head, which causes it to rise to the top of the combustion chamber and to thoroughly expel the burnt` gases through the escape pipe 17. The two opposite openings 15 and 16 are closed again almost instantaneously as the piston ascends on its return stroke into the combustion chamber, where the gas is again compressed and nally eX- ploded.

Obviously, changes inthe details of construct-ion may be made without departing from` thespirit ofthe invention, and we do not care to limit ourselves to any particular form or arrangement of parts.

` l/Vhat we claim is: V

.. 1. In an internal combustion engine, a

cylinder having its extremity adjacent to the crank case closed by a bottom plate; a piston having a rod rigidly attached to its head, said rod passing through an opening in the bottom plate and having its other end connected by a pivoted member to the crank shaft; an externally located conduit connecting the compression chamber formed in the cylinder between said piston and said bottom plate,

with the combustion lchamber of said cylinder, said conduit being broadened at the lower side and progressively contracting to a small opening at its discharge point into the combustion chamber and being of a capacity substantially equal to that of the combustion chamber and of the compression chamber'of the cylinder; means for impeding thereturn of the gas into the carburetor.

2. A combustion engine as claimed in claim` 1 ,A1nf which the piston has a recessed projection on its upper side to deflect the compressed gas upwardly in the combustion chamber when the piston is in the lower limit of its stroke and promote expulsion of burned gases through the exhaust. Y

v In testimony whereof wei aiiix our signatures; l

CAMILO PEYNETTI VALDATA. MANUEL CRESPO GARCIA.

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