US1759758A - Carbureto - Google Patents

Description

E." H. PHILLIPS May 20, .1930.

CARB-URETOR Filed Jan. 11, 1928 Patented May 20, 1930 I STATES TE- O F CE f EDWARD HENRY PHILLIPS, or 'KENSINGTOE:AUSTRALIA, IASSIGNGR TO PHILLIBS I ,voLAT'ILIson SYNDICATE :ICOMPANTY, 1 LIMITED, or "SYDNE EW sourn WALES, 1

AUSTRALIA, A'ooMPANY'on NEW soUTHWALE's i Application filed January 11, 1928, Serial no,

simple and efiicient carburetor.

lilanylappliances have hitherto been invented andfused for thejpurpose of gasifying ances have been noreor less eff cient. For

some purposes it is only necessary to produce whatis known as al'weak iniXtureat a comparativelyslow speed, but for the'purpose of power production the appliances used for the gasification of the liquid fuel mustbe capable ofproducingithe gas rapidly or slowly andin variable degrees of ri'chness. lVhilst many of the'carburetors. that are now used for power production give satisfactory results few if any of thein produce whatmight' "be calledja'dry'gaaor in otherv words a percentage of the fuelis not' gasiiiedat the proper time and in some instances enters the engine cylinders thereby causing carb oniza- "tlon'and of course result ng- 1n wastage of fuel. The general practice adopted is to cause the current-ofairinduced byeach' suction stroke of the engine to 'bedrawn through a mixing chamber Wherein a. predetermined quantity 'oflliquid fuel is projected, induced 'or contained so thattheair-is brought into Contact wlth a' et .or over the surface of the liquid'fueli f Attimes the atmospheric con ditions are such thatthe gas mixture thus obtained is not suflicientlyrich and supplemen .tary means are adopted for the purpo'se of strengthening the mixture, I

I WVhen a relatively richinixtiire is required it is not sufficient to pass theairlthrough the liquid fuel in the form of large bubbles, as the superficial area of contact between the air and the liquid is not large enough to bring about the required amount of vapori-' zation. According to my invention I employ a container into Whichthe liquid fuel is controllably fed, and which is connected to the engine intake so that each suction stroke of' the engine Will create a partial vacuum with? submerged in the liquid fuel and having a number of perforations preferably in the top thereof. This chamber is connected to one" the engine intake.

' which; r

248,057, andin -Australia ,rebmar jis 1921 I end of a pipe through which air may becontrollably drawn into the chamber, such ,air

passing thence through the perforations, in

thetop of the chamber, upwardly through I I I the-liquid fuel Within the container, to the "liquid fuels such as petrol and these.appli air space above it, in its passage to the pipe connected to the engine intake The combined cross sectional area of the perforations I is preferably equal or thereabouts to the cross sectional area of theair inlet pipe connected to the chamber that when a" partial vacuuin'is' created within the container by each intake stroke of the engine, the consequential in-rushof air to displace the partial vacuum will escape partly through each perforation. The number and positions of the perforations additional controllable air inlet forthe'purpose of weakening the mixture i when necessary, thedischarge orifice of such inlet' pipe beingsituated above'the level of the liquid fuel, Whilst means are provided to prevent the possibility of the fuel inits liquid state from entering the pipeth'at' is connected to "The invention naybe applied in various forms bu't'i'n order thatit may thoroughly understood more detailed description: will now be given and reference will bemadej to' the accompanying sheet 'of drawings in The figure is a perspective View of the: inventioninone of its simplest forms, aporza't-ion is effected being broken away to expose the interior parts. r g

' The container 10in which vaporization is effected is provided with aflange 11 whereon is seatedand secured in any suitable manner a tionof the'wall of the vessel'in which vaporilidor'cover l2, an air tight joint between those I two parts being made by any knoWn means. Connected to the underside of the cover plate '12 is a chamber 13 which functions'as a dry-' ing chamber and thereby prevents the fuel in its liquid state from entering the draw off pipe 14 which is connected to the engine intake, It is so constructed that should'fanyl 7 fuel in itsliquid state enter thechamber it is conveyed to a point where it is'immediate- V 7 1y drained off but the gas that enters passes onto the draw off pipe. 'The cover plate12 may'formthe topeof the chamber 13 and internallcominunication betweenf the pipe 14;

' and the chamber 13 be established through fan orifice in the-cover plate. At oneside of e ,iiand near the top of. the chamber '13 is an rificel5 to theinner' s ide of which a pipe 16 is connected, such pipe being bent and-extending downwardly to near the bottom of the drying chamber13. It is preferable thatthe bottom of the drying chamber 13 be slightly inclined to a point immediately below the lower end-of.the pipe 16'so that should violent 1 vibration cause theliquid fuel Within'the con- 'tainer to enter through the orifice .15 it will pass downthe pipe 16 and be discharged on to thejlowest point of the bottom and immediately gravitate back into the container through a drain pipe 17. It will be seen that the pipe 16 isthe mechanicaljequivalent ofa bafiie plate and it will in some cases be advantageous to dispense with the pipe 16 and substitute therefor a plurality of baflie plates so that the gas entering the orlfice willbe caused to take a serpentine course 1n itsv passage through the drying, chamber to the-pipe 14. ,Connected to and passing through the cover plate 12 are two air inlet 7 pipes 18 and 19 the lower endof the former terminating at a point about midway between theends of ,th'e'vessel'whilst the lower end of the latter terminates in an orifice in the top of a flat air distributingcham-ber 20.} The top of the chamber 20 is provided with a number of perforations 21. The horizontal cross sectionalshape of the air distributing chamber in the container 10-at a'predetermined level,

7' the vinlet pipe 23 passing through the bottom of the container 10 and being connected vdirectly orindi-rectly; to a liquid fuel supply tank. or strengthening purposes the pipes '18'and'19 may pass through orifices in and be rigidly secured to a bracket 24'which is 'fixed to'theside of the'chamber 13.7 The pipe'18 is preferably closed at its lower end andxprovided with a number of perforations 28,

venient known means may be 'adoptedi'for operating these valves either separately or co'njointly.

V .The pipe ll will be provided'with one or more back pressure valves 27 to obviate the risk of fire or explosion caused by back firing and asianadditional precaution against such valve will of course be interposed between the Valve 27 and the engine intake. l

I claim: V 1. A carburetor comprising chamber 'withilr' the container, an air inlet pipe having one end connected to the air distributing chamber,the=other end being controllably open to'at mosphere, a float valve for maintaining the liquid fuel at a level above the air distributing'chamber,aidrying cham- "happenings, the vessel 10 may be provided with a relief valve 29, and another relief a a container for i I :liquid fuel, a perforated air distributing ber having an orifice through-which the mix- I V ture from the container'may enter, a pipe connected to the orifice in the drying chamber and extending downwardly within and. to near the bottom of the dryingchamber, a gas draw off pipe connected to thedryingcham ,ber, andv means for, draining said drying i chamber.

2. A carburetor comprising a container for liquid fuel, a perforated air distributing chamber within the container, anzair inlet pipe having one end connected to thedistributing chamber, the other end bein control lably opened to -the atmosphere, afloat. valve forv maintaining'the liquid fuel at ,a level above the air distributing chamber, a second air inlet conduit', one end of'which is con-,7 1 trollably. openedtothe atmosphere, the other 7 endterminating at a" point above-the levelof the liquid fuel within the container, a drying chamber havinganorifice throughwhich the mixture fromthe container may enter,a V conduit connected to the orificein the drying chamber and extending [downwardly within F and near the bottom of the drying chamber, a mixture outlet conduitconnected to the drying chamber, and means for draining said drying chamber. r

In testimony whereof, I havethis fifteenth b day of December, A. to this specification.

1 2 gned y n m EDWARD HENRY PH i sQ through which air will issue radially and be thereby more thoroughly mixed withgas con- :ta ined in the space above the liquid fuel within the container 10. The'pipe 18 may be dis- V pensedwith and other means employed for the purpose ofreducing the richness of the gas'that passes 'intothe pipe 14'. Each of the pipes 18. and 19 may be controlled by suitable valves 25' 211K126 respectively and any con--

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