US1269757A - Apparatus for proportioning the charge of fuel and air in internal-combustion engines. - Google Patents

Description

L. s. STEVENS. APPARATUS FOR PROPORTIONING THE CHARGE OF FUEL AND AIR IN INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAYZS, 1915. 1,269,757.

Patented June 18, 1918.

$4. Md; I

v UNITED STATES PATENT omnon.

LYMJAN s. STEVENS, or BALTIMORE, MARYLAND.

dbl-PPABA'IUS EORZPRGPORTION'ING THE CHERGE OF FLT-EL- AND AIRlN INTERNAL- GQ'lVIlBU-STION" ENGINES.

- Specification of Letters Patent. Patented J e 18 1918 npplicationfiled May 25,1915.v Serial No. 30,310.

To. all whom itmay. concern mBe it knqw nvthat LL MA 8.; STEVENS, a rcitizen of, I the ldnitedf States residing. at Baltimore-city, in the, State of,Maryland, a 5. have invented ia certain- ,new and. useful JAP- j-paratus! sfon .Propgortioning, :the: Charge of --Fnel and "Air; in lnternalcqmbustiongEngines, of which the followingris a;.spec1ficaa ti on.

1 My-inventionrelates:to improvements in .;apparatus. for. .'-proportioning the:v charge of r f l: ndi n nterna'leombustl e g ,and .the'objectgof ny invention is the 'providing of \means, tomeasure the; exact amount 5 ofgasonoarburetedairthat is consumed in I the cylinder of an3 internal combustlon ene. I A, further;- object -:of my.- invention is i the providing;. of; meansv of controlling the size -,iofsthe measure measuningi the amount of gas oricanbureted air that is consumed. or .may Vibe regulredto:bQ regUlatBd I A further object. of my invention is an improved regulatorrforiregulatingvthe size .-otsa dim as a furthemobject. of myainvention is the -means of definitely proportioning. the; an

i -1;tu1'e,-o -fuel-Y and air an internal coinbusz :tion engine and ofregulat ng said} proporw l ii ll Y vvi r theaioreg ins other Oblectsview my invention consists of the novelconstnuction, .combinatlon iand arrangement of parts; as 4 hereinafter, specifically. described :iand illustratedin the accompanying. drawing; wherein shown the ;preferred" embodi- 5 irmentiofwmy inwention butit is to be:understood: .tl at; changes, variations .and,inodifica- 1: tions cans-beresorted atO,Wll1Cl1 come w thln e hescope f, i t c ims-he e nt app n In the drawing. of ethe herein described nembodimentof imy inven-tion is shown arview in .el vatio apar v n se io wf my PP ara tus -asapplied-to adouble acting,v;two ,145 cycle internals combustion engine, but I wish 1, itlunders QQd-that it will-be justasgeifective pit -applied to asingleeacting, two cycle, four ';cycl a not ervtyp .,eI1gne a r :19; Similar y, numerals refer to simila'r. I parts i throughout theseveral}lviews.

' luand. 2?:21'8 the;oombustionwcylinders.V 3 wand 4, are;,\pistons operating within said I cylinders; andgin; the .rconstruction shown orm at s ngle pi 5 isanexra isi n ta 1 6 ds ,a' reducingqvalve. 7 s a pipe from. the

l supply. 8 is the conductingchamber which embraces pipes- 9 andcylinder 10. 11 is a delivery pipe connecting expansion tank 5 ity of cylinder 10.

Pipes 9 connect to cylinders 1 and 2 through valves 21 and 22, which valves regulate the admission of fuel into the working cylinders from conducting chamber 8 and are operated and timed by cams 23 on disk 14. 24 is an air pump connected to cylinders 1 and 2 by air pipe 25. The admission of air from pipe 25 is-controlled by pistons 3 and a respectively, uncovering air admission ports at or near the end of-their stroke, the

air in air pipe 25 being undersome pressure.

26 is an exhaust port for cylinder 1.

Thecperation of my invention is as follows:

The fuel which may consist'ofany expansive oXidizable substance, among'which might be enumerated, hydrocarbon. 'miX- turesor evaporates and carbonxmonoxids, is admitted toeXp-ansion tank 5 and there maintained under-substantially a constant pressure, by supply 7 and regulating valve 6.

,Upon the opening of valve 12 conducting chamber 8 is filled with the fuel at the pres sure of that of expansion tank 5', tl1e capacity ofconducting chamber 8 is varied by enlarging orv decreasing the capacity of cylinder 10 on the working side of 'piston 18 by the moving of said" piston, thus the amount of fuel in conducting chamber 8,'under a definite pressure is constant and predetermined and may be 'changedwhen desired.

Valves 12, 21 and 22 are so timed that valve 12 is always closed when either of the others is open, and'the other valves are so timed r as to admit fuel from conducting chamber 8 into the respective cylinders which they each control at the desiredtime V of admisslon, relative to the pistons working therein. v

Upon theopening of either valve 21 or 22, discharge takes place from conducting chamber 8-aiidthepressure drops therein and becomes equalized with the pressure in .the cylinder which is "in communication therewith. I might remark here that the pressure in the expansion tank ismuch in excess of the ressure in the cylinder-sat the time of admission through either valve 21 or22.y'

1 For further information it may be desired to give a concrete exam le of one adjustment 7 and proportioning. ydrocarbon gas may be admitted through supply pi e 7 at-sixty p d g ge pressure and re uced by r ducing valve 6 to thirty pounds gage pressurein expansion tank 5. And under the condition that'conducting chamber Shave a f' relative cubical, contents to'cylinders 1 and 2 of one-sixth the size of each of said cylinders, fuel may enter said cylinders during the compressionstroke at any point below "theexpansion tank pressure, 'I'ha'vej found I betweentwo and five pounds satisfactory.

Having thus described my invention, what 7 I claim and desire to secure by Letters Fat ent is:

fuel in said chamber in combination with means of varying the'capacity of said chainber' within the limit's of its maximum or minimum to predetermine a definite charge for said cylinder and means of maintaining said capacity during the discharge from said J chamber.

2. In an internal combustion engine, a workin' cylinder, means of admitting airto said cy inder from the atmosphere "at at mospheric pressure, a source of gaseous fuel,

aconducting chamber intermediate between said source and said cylinder and means of controlling the entry and exit of gaseous fuel in said chamber in combination with" means of varyingthe capacity of said chamber,consisting of a chamber provided with means of changinigthe volume thereof with- I inthe limits of its maximum or minimum a to" redetermine a definite "charge forflsaid'j I v p x expansion tank into Sald' "COIIdIIGtiIigQGhQm 7 cylinder andmeans of maintaining I said capacity during Ithe discharge from said chamber. j t i 3. In an ,internaljcombustion engine, a 4 workin 1 c linder',' means of admitting'fair to Said; cyfifid er' fromthe atmosphere at atmosphericpressure, a source'ofgaseous fuel, a

conducting chamber intermediatebetween said source, and said cylinder, and means of controlling the entry and exitof gaseous fuel in said chamberincombination with means of varying the capacity of'said chamher, consisting of a chamber provided with meansof changing the volumethereof within i aiu mz amal i I Vided with means of varying the 0 thereof, consisting of a movable.wall

the limits of its maximum or minimum to predetermine a definite charge for said cylinder and meanstf maintaining said cap y' ur g th is arge froms eidch *bBB and external means for making such regulation.- a t a 4. In; an internal combustionfengine, a

workin cylinder, means of admitting air to said cy mder from the atmosphere at atmospheric pressure, means of admitting fuel to said cylinder from a sourceof constant'presitythereof to predetermine a "de nitefcharge for said cylinder, means of maintaining said capacity during the discharge from id chamber and means of controlling the flo of 'fuel in 'and out'of "said chamber.

5. In an internal combustion engine,

means of proportioni'ngthe admixture of' gaseous fuel and air, consisting of an adjustable gaseous fuel measure whereby a predetermined definite" quantity of gaseous fuel is admitted to a'hgiven quantity of air to' predetermine a de nitecharge for said cylinder and means of maintaining said 6. In an" internahcombustion engine "in combination, a plurality of working cylinde'rs provided with means of admittlng fuel from a common "source to each of the said cylinders independently, means of coma ling the discharge into" said common source "a space between said discharge' meansand said'admission means provided with means of varying the capacity of "the" same within the limits of-its maximumorminimum, and

automatic means operating to close said space to each of the cylinderso'r supply as the case may be 7 In aninternal combustion engine, a gaseous fuel expansion tank provided with means of "maintainin a constant' pressure therein, a; working cy inder, means of"con atrolling the admission of fuel into said cyl :inder, a-conducting chamber between said expansion tank and said admission providedwithmeansiofvarying theca'pac 1 thereof, and means of admitting from" sai her and closin'gthe same when said f cylinder admission means pennits"admissio ifmm said conducting chamber into said cylinder;-

, 8;In an'interhal combustion engine; a

gaseous fuel expansiontank provided with nean s of mainta ning a "constant jpressure therein, a working cylmder means' of conlin der,a conducting chamber between sai exj panslon tank and said admission" means *protrolling the admission of fuel tosjaid ure consisting of'anintermediat-e chamber 7 provided with meansofchang'in 'thecapac and means of operating said wafl'rromwith out to change the volume thereof, and means of admission from said expansion tank into said conducting chamber and closingthe same when said cylinder admission means permits admission from said conducting chamber into said. cylinder.

9. In an internal combustion engine in combination a plurality of working cylinders provided with means of admitting fuel from a common source to each of the said cylinders independently, means of controlling the discharge into said common source, a space between said discharge means and said admission means provided with means of varying the same, and automatic means operating to maintain said space closed to each of the cylinders or supply as the case may be, and a gaseous fuel expansion tank provided with means of maintaining a constant pressure therein in communication with said space and controlled by said admission means.

.10. In an internal combustion engine, a working cylinder, means of admitting air to said cylinder from the atmosphere at at mospheric pressure, a source of gaseous fuel, a conducting chamber intermediate between said source and said cylinder and means of controlling the entry and exit of gaseous fuel in said chamber in combination with means of varying the capacity of said chamber to predetermine a definite charge for said cylinder and means of maintaining said capacity during the discharge from said chamber.

11. In an internal combustion engine, a working cylinder, a source of gaseous fuel supply, a conducting chamber intermediate between said source and said cylinder and means of controlling the entry and exit of gaseous fuel in said chamber in combination with means of varying the capacity of said chamber within the limits of its maximum or minimum to predetermine a definite charge for said cylinder and means of maintaining said ca acity during the discharge from said cham er.

12. In an internal combustion engine, a working cylinder, a relatively fixed air supply, a source of gaseous fuel, a conducting chamber intermediate between said source and said cylinder and means of controlling the entry and exit of gaseous fuel in said chamber in combination with means of varying the capacity of said chamber, consisting of a chamber provided with means of changing the volume thereof.

13. In an internal combustion engine, a working cylinder, a source of gaseous fuel, a conducting chamber intermediate between said source and said cylinder and means of controlling the entry and exit of gaseousfuel in said chamber in combination with means of varying the capacity of said chamber, consisting of a chamber provided with means of changing the volume thereof within the limits of its maximum or minimum.

14:- In an internal combustion engine, a working cylinder, a relatively'fixed air supply, a source of gaseous fuel, a conducting chamber intermediate between said source and said cylinder and means of controlling the entry and exit of gaseous fuel in said chamber in combination With means of varying the capacity of said cylinder, consisting of a chamber provided with means of changing the volume thereof and external means for making such regulation.

15. In an internal combustion engine, a working cylinder, a source of gaseous fuel, a conducting chamber intermediate between said source and said cylinder and means of controlling the entry and exit of gaseous fuel in said chamber in combination with means of varying the capacity of said cylinder, consisting of a chamber provided with means of changing the volume thereof within the limits of its maximum or minimum and external means for making such regulation.

LYMAN S. STEVENS. Witnesses 5 HOWARD A. SWEETEN, WILLIAM W. VARNEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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