US1441302A - Apparatus for distributing the combustible fluid and air in explosion engines - Google Patents

Description

i Jan. 9, 1923. 1,441,302. i E. SCHNEIDER.

APPARATUS FOR DISTRIBUTING THE COMBUSTIBLE FLUvID AND AIR IN EXPLOSION ENGINES.

HLED 1uLY21,19`20. 2 SHEETS-sum1.

Jan, 9, 1923. I 1,441,302..

E. SCHNEIDER. APPARATUS FOR DISTRIBUTING THENGOMBUSTIBLE FLUID AND AIR IN EXPLOSION ENGINES.

\FILED JyLY2I,I920. I 2 SHEETS-SHEET Z i Patented dan. 9, i923.

narran sra-.ras

1,441,3ezA

ra'rsur OFFICE.

EUGENE SCHNEIDER, or PARIS, FRANCE, 'nssIGNoia To SCHNEIDER` a CIE., 0F PARIS, FRANCE, A LIMITED JOINT-STOCK COMPANY '0E FRANCE.

APPARATUS Foa nIsrRIBUrING THECOMEUSTIBLE FLUID IAND AIE IN EXPLOSION ENGINES. I

- Application led July 21,

To all whom t may concern:

Be it known that I, EUGENE SCHNEIDER, a citizen of the Republic of France, residenty of Paris, France, have invented new and useful, Improvements in Apparatus for Distributing the Combustible Fluid and Air in Explosion Engineawhich invention is `fully set forth` in the following specification.

The various apparatus employed for distributing combustible fluid andair in engines worked by an .explosive mixture, generally comprise a mixing valve, a cylindrical slide` valve fixed or sliding onthe valve stem for admitting the air and gas into the mixing box, and external regulating devices (throttles, sliding valvesl or lifting valves).

The present invention consists in improvements in apparatus of this kind comprising a mixing valve and two rotary cocks for admitting .the gas and air into the mixing box.

The invention is illustrated in the accompanying drawings in which Fig. 1 is a vertical axial section of the mixing box. y y ,c

Fig. Qfis a horizontalv section on the line 2-2ofFig- 1.

Fig. Sis an elevation of the mechanisms for operating the valve and cocks. g

Fig. 4 is a diagram of the working of the distribution. f

Figs. 5, 6 and 7 are horizontal sections, showing di'erent positions of the cocks, corresponding respectively to the points 13s and t of the diagram.

In the improved distributing apparatus shown, the mixing valve is operated by means of rolling-contact levers from an eccentric ixed on the distribution shaft. The air and gas cocks connected together by rodding, areactuated likewise from an eccentric fixed on the distribution shaft, but are controlled by means of an escapementunder the control of a centrifugal governor. 'At the commencement of the suction stroke the mixing` valve lifts and the air and gascocks operated by their actuating mechanism, uncover the admission ports, thus allowing air and gas torenter' the cylinder.

When the admitted charge corresponds to the power required from the engine, which is determined by theposition of the governor, the escapement acts; the cocks moved back suddenly by any suitable auxiliary mo- 1920. serierNo. 397,954.

tor (generally kof the spring type)l serving as a dampingk device, cover again the admission portsyandthe introduction of the mixture into the cylinder ceases. Themixing valve, whose lift and duration of lift are always the same, kcloses when the piston is on its dead centre, at the end of the suction stroke, orpreferably a little after this point, so as to'assure, if necessary, a maximum possible admission', and thus produce, in case of an overload, a corresponding great power.

The` improved apparatus thus allows of assuring variable admissions, and consequently variable compressions of explosive mixtures of constant richness.

`ln Figs. l and 3, c is the' engine cylinder; b the mixing box; c the gas inlet pipe; c1 the `air inlet pipe; d themixing valve; e the gas cock; e1 the air cook; f f1 are rolling-contact levers for actuating the mixing valve; g is the rod 'of the eccentric that actuates the said rolling-contact levers; 71, is the eccentric that actuates through an escapement, the air and gas cocks; is a shaft driven yby the governor. 4 l

The essential characteristic feature'o'f the invention consists in a special construction of the gasand. air cocks e and l1,'wliereby they are converted into real devices for regulating the explosive mixturewithout it being necessary for this'purpose to provide external devices, such as throttles, slide valves or lift valves; thc ycocks constructed according to this invention having moreover the exactness of action 'which is impossible to be achieved by means of external devices.

With this object, the air and gas cocks are so constructed that the total sections of their orifices uncovered at any given point of the suction stroke, is always less than the section formed at that said point by the opening of the admission valve. If it were otherwise, the gas which is under pressure would form a packing in the mixing box and would. render the explosive mixture defective as has been proved by experience.

In the diagram of Fig. 4, the line A. B represents the suction stroke of the engine piston, this suction taking place in the direction of the arrow. The curve m represents the law of the lift of the mixing valve ol with its slight lead on opening and its lag on closing.

` The curve n in the portion up illustrsitesl the workin@` oit the aiir und gus cocks :is .heretofore practiced'. Since the cross-sectional openings are proportional `to rthe li'l'ts7 .it will be immediately perceived that troni the point o onnf'erds, wher-i the valve closes, the puth traversed by they cocks increases, und that, consequently7 in the .region 0*-5'1 the cross-sectional opening determined by the valve will be less than the. total cross-section uncovered by the cocks, causing :i packing oi? the gris in the mixing' box es above referred to and resulting in u. detective explosion mixture.

This d. 'swhack is avoided by the Yliuct that the cocks which move in the sleeves il lill fitted into the mixing' box and provided with inuitipie ports, comprise orifices equal in number to the number of the rports in the sleeves and of the same Width as the last mentioned ports, with laps soV arranged that the ports are uncovered gradually from the lgieginning` of the suction stroke to the po-int (i und from this time onvfsrdsj ure covered gradually to the end ot the suction stroke.

The positions of the cocks shown et the poi-nts 1?. s. t ot the suction stroke Vof the piston indicate the degrees ot ope-ning ot the orifices for these points. f

The con-sequence is that the curve determining); the cross sections ot the orifices will l'ollioiv the line ii slightlv below the line m, representing the cross sections oi" the mixing nive. The speed oi' the ges and nir being; thus u nisxinnun in the orilices that :ire uncovered by the cocks5 their regulation can be assured in s perfect manner ,by the letter.

iVith this object, n hand mechanism allows et disp-lacing the cocks` longitudi nelly in their lodginent during the work-ing ot' the engine, by causing;` them to slide along` their actuating axles in. such n, inanner as to .niodity in a suitable sense. the ciliective length und consequently the cross section of the gas and uir orifices, and thereby producing' un explosive mixture having :L composition adapted for the best combustion.

l 2 illustrates by WayA of exzfunple u mechanism @t this kind; the smell hand wheels (j, (Il allow ot pulling or pushing; beck the cocks e el so :1s to lengthen or shorten the effective length ot the uncovered orifices.

Hevingr non' particularly described :unl Aascertziined the nature otiuy seid invention and in what manner the suine to be performed7 l dechire that what l ycluin is;-

in appara-tus Yfor distributing;r combustible iinid und air to internal combustion engines, the combination oit e. mixing chamber having n. valve-controlled disch?u ge port sindv inlet ports one oi' which admits combustible and thel other of which sdniits sir. rotary vulve members in seid inlet ports, ineens tor operating;` seid vulve nienib'ers during the suction stroke r.`l'1ereli the total section uncovered by ssid valve lneinbers is alive-ys less tluin the section uncovered by said discharge vulve, :and menus toryetliect'ig the longitudinal displacement ot said vulve n'ieinbers during the working ot the eri-gine tor 'aryiug thi` proportions oi: uir und courl'uistibl'e .ons in the explosive mixture.

in testimony vfhereoii if have signed this specification.

Dated this 21st dey ot liiay 1920.

nusnnr. soumises.

lYitnesses ANDR lios'rronnn, CLEMENT S, EDWARDS.

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