Патент USA US2126132код для вставки
Aug. 9, 1938. J. A. PAAscl-IE ' 2,126,132 cARBuREToR Filed May '7, 1934 3 Sheets-Sheet 1 //////// // / / / // /////// / Il L llxxm S M Imre/1115i?. tTem/.9 J?. Paœche, 92 WMM ¿WAC/3752 Aug. 9, 1938. J. A, PAAscHE 2,126,132 CARBURETOR Filed May '7, '1934 5 Sheets-Sheet 2 E. k , `. MQ 2%/ \\ ,v l w. w @si Aug. 9, 1938. J. A. PAAscHE 2,126,132 cARBuREToR Filed May '7, 1954 " k s sheets-sheet s _ ‘ v ` Inverti/'UTP . Jän/5 ß, Pau/57216, @www [email protected] Patented Aug. 9, 193s 2,126,132 UNITED sTATEs PATENT OFFICE v2.12am cannnnn'ron Til Jens A. Panache, Wilmette, Ill. Application May 1, 1934, serial No. '124,313 3 claim.A (ci. zel-4s) The present invention relates generally to4 stantly and completely burned or exploded means for vaporizing or carbureting liquid fuel whereby materially to increase the operating eili for various purposes as in the production of an ciency of the instrumentality to which the fuel is supplied. explosive mixture for internal combustion en Other objects and advantages will become ap- 5 gines. parent in the following description and from the ' An object of the invention is to provide a novel device of this character which is capable, in op accompanying drawings, in which: Figure 1 is a substantially axial section through - eration, of producing a combustible or explosive mixture of fuel and- air in an exceedingly iinely a device embodying the features of the invention, certain associated parts being fragmentary or in 10 10 divided, dry, smoke-like form. Another object is to provide an improved fuel carbureting device having means therein for com bining a liquid fuel and a `vaporizing gas, usually air, -to reduce the fuel to a thoroughly vaporized condition, and means for subsequently mixing elevation. ` Fig. 2 is an axial section on an enlarged scale throughthe atomizing or vaporizing section of the device. i Fig. 3 is a top plan view of a mixing element 1 such vaporized fuel intimately with air to pro-v forming a part of the vaporizing section. Fig. 4 is a side, elevation of a discharge cap duce an explosive mixture. structure for _effecting a mixing flow of part of the secondary air stream into the volatilizled fuel. Another object is to provide a device of this character having means for varying the volume of the air introduced to vaporize the fuel ac 'Fig. 5 is a transverse section taken as indicated ‘20 by the line~5---5 of Fig. 2. _ cording to the quantity of fuel, the proportion Fig. 6 is an elevational view partially in section looking at the device from the right as shown by Vthe arrows 6-6 in Fig. 1. being suchv as to effect an efficient volatil'ization of the fuel, and which embodies means for vari ably adjusting the lratio of the quantity oftvolatil. ized fuel and the volume of the air subsequently added to produce an efliciently explosive mixture. The air which is added in successive steps will hereinafter be termed respectively “primary air’ and “secondary air”. ' Fig.~7 is a similar view‘looking at the rear side 28 of the ‘device as shown in Fig. 6. i ‘ Fig. 8 is a horizontal section through thevsec ondary air valve showing the operating mech anism and parts associated therewith. ‘ Fig. 9 is a detail view of the temperature con- 30 Another object is to provide a >novel carburet ing device wherein the fuel to be carbureted is acted upon by air in separate stages, ñrst to trolled mechanism and the direction in which the view is taken is indicated by the arrows 9--9 in Fig. 6. Fig. 10 shows the device in elevation as viewed atomize or volatilize the fuel to _effect complete transformation >thereof >to a gaseous state, and next to introduce air intimately into such gaseous fuel to produce an eiîiciently combustible or ex plosive mixture, said device having fuel and air inlets which are variably controlled to obtain that proportion of air to fuel or fuel mixture from the left in Fig. 6. valve cam assembly. " While the invention is susceptible of various modifications and alternative constructions, I have shown in the drawings and will herein de- 4o which will most efficiently produce the required results. . Fig. il is a side face view of the secondary air , Another object is to provide, in a device of this character, means for controlling the admission of secondary air which is effective to admit air . .practically in measured volume as required by scribe in detail the preferred‘embodiment, but'it ' is to be understood that I do not thereby intend to limit the invention to the specific form dis closed, but intend to cover all modifications and alternative constructions falling within the spirit 4i. the volume of introduced fuel, _and further to and scope'oi’ the invention as expressed in the associate therewith such means as a thermally appended claims. responsive device for varying the actionof the air control means to meet changing temperature conditions. . A general object of the invention is to provide a carbureting device of simple operation and inexpensive construction which will reduce liquid fuel to such a ñnely-divided condition that the ultimate fuel mixture is capable of _being in ‘ According to the present invention, the liquid fuel is reduced to an explosive mixture in several stages, the ñrst of which is the conversion of the liquid fuel into substantially a volatilized condi tion by the action thereon of a relatively small volume of gas or air which is ample to produce a complete vaporization of the introduced fuel, but is otherwise ‘insumcient to produce an efii- y 2 2,126,132 ciently explosive mixture. The gas and fuel mixture are momentarily confined in a mixing chamber wherein the gas is violently agitated to insure complete volatilization of the fuel. Sub sequently, such volatilized ,fuel is thoroughly mixed with air from a secondary air stream, part of the secondary air being drawn into the mixing chamber to produce a thoroughly homogeneous mixture and to further insure that no liquid particle of fuel remains unvaporized. The vol ume of secondary air admitted is accurately and variably proportioned with respect to the quan tity of fuel in the gaseous mixture to produce an eiiicient explosive mixture. 15 . From the following detailed description, a pre ferred form of device embodying the invention will for illustrative purposes be considered in op erative association with an internal combustion engine as an example of a fuel consuming instru mentality. It will be evident, however, that the device may, without substantial modification, be used with instrumentalities other than that shown. Referring to the drawings, IIJ and II indicate 25 respectively the intake and exhaust manifold of an internal combustion engine. Secured in open communication with the intake manifold is a tubular member I2 which may, if desired, extend through the exhaust manifold but, of course, has 30 no communication therewith. The member I2 constitutes one section of the enclosing member or housing of the fuel vaporizing device, and a continuing housing section I3, suitably secured to the outer free end of the section l2, completes 35 the housing. The section I3 has an angular bend therein to provide a laterally directed tubular end I4 constituting the secondary air intake as will presently be more fully described. The carburetingdevice embodies mechanism 40 for discharging fuel and a relatively small volume purpose of the container and tube 21 will here inafter be described. _ Extending horizontally from the head 24 is a boss 28 (Fig. 7) -which is screw threaded external ly to receive a valve supporting gland 29. The 5 boss has an axial bore 28a communicating with the passageway 25 preferably at a point below the upper end of the induction tube 21. A rotatable valve 30 in the gland is held in place by cooperat ing shoulders on the gland and valve and an actu ating stem 3I projects through the outer end of the gland for connection with a radial arm 32. The valve has an L-shaped bore 33 therein, one leg of which registers as a continuation of the bore in the boss 28 while the other legis arranged to be moved variably into communication with a primary air inlet port 34 provided in the gland 29. lThe fitting I1 (Fig. 6) has a second laterally extending nipple 35 thereon which is shown as being located a quarter circumference from the nipple 22. The nipple 35 constitutes the liquid fuel intake and has a bore 36 which communi cates with the passage 31 through the tube Iii. The outer or lower end of the tubular fitting I1 has an axial recess 38 (Figs. 1 and 6) therein, the base of which is formed by an annular shoul der 39. A The restricted bore defined by the shoul der forms a sliding bearing for a lower inter mediate portion of an elongated valve stem 4U which extends upwardly approximately to the tops of the tubes I9, 20 and downwardly beyond the fitting I1. v The valve stem controls a fuel inlet valve, to be presently described, and the stem is adapted to be manipulated by means which is supported by an end section 4I provided herein as a detach able continuation of the fitting I1. The abutting ends of the fitting and end section preferably have complementarily formed flared and tapered sur faces 42 for accurately determining the proper of air into the casing I2 and towardthe intake » relation of one part to the other, and an annular 40 manifold I0 in a highly volatilized condition. shoulder 43 on »the end section is engageable by Preferably this mechanism comprises the follow ing arrangement of parts, reference being had particularly to Fig. 1. The outer bend of the section I3,is apertured, as at I5, and about the margin of the aperture is an outstanding flange I6 which is internally screw threaded for engage ment by a tubular fitting I1 having an enlarged recess I8 facing inwardly of the housing. Prefer ably the axes of the fitting and of the recess I8 are located on the axis of the housing. An elon gated tube I9 is screw threaded onto the fitting to extend from the base of the recess I8 concentri Cn ci cally through the recess and along the axis of the casing a considerable distance toward the intake manifold. A larger tube 20 has internal screw threaded engagement with the mouth of the re cess I8 and extends concentrically along the duct 60 I 9 to provide a passageway 2I therebetween. The fitting I1 has a laterally extending nipple 22 for connection with the primary air intake con trolling means. Internally of the fitting, the pas sageway 23 through the nipple communicates with the enlarged recess I8 and thence with the passageway 2| which in consequence becomes the primary air conduit. Connected with the nipple 22'is a head 24 (Figs. 1 and 7) having a passage way 25 therein. The passageway is longitudinally angular so that when the parts are assembled the outer end of the passageway opens downwardly into communication with an upright container 28. An induction tube 21 extends from the bot tom of the container loosely in'to and a short dis 75 tance along the passageway 25 (see Fig, 1).A The a gland 44 which is screw threaded over the end of the ñtting to secure the parts rigidly together. The end section has an axial recess 45 therein which, when the parts are assembled, is a con 45 tinuation of the recess 38. Together the recesses 38 and 45 receive the spring and packing ele ments of a conventional compression packing, generally designated at 46, for preventing leakage along the valve stem. The bottom wall 41 of the ' recess 45 provides a bearing for the valve stem as does a plug 48 in the extreme end wall of the end section. Between the wall 41 and plug 48, the end sec tion has a generally rectangular transverse open 55 ing 49 therethrough for receiving a part of the operating mechanism for the valve stem. vRefer ring to Figs. 1 and 6, the valve stem, near the bottom wall of the opening 49, has a collar 58 rigidly secured thereto. A lever 5I, which is pref 60 erably formed of a metal strip bent transversely into a U-shaped member to straddle the valve stem, is pivoted on the end section, as at 52, and extends laterally and horizontally (as shown) across the collar and beyond the side of the end section. Hence, downward movement of the longer end of ’the lever moves the valve stem downwardly and the return movement is effected by a spring 53xbearing between the collar 50 and 70 plug 48. Preferably the surfaces of the lever which engage the collar are arcuate, as shown at 54 (Fig. 6), to minimize friction. The lower end of the end section preferably carries such means~ as a set screw 55 for adjustable engagement with 2,126,1sa 3 the short end of the lever and is effective to set mixture of the two streams and final vaporization ‘ of any remaining liquid fuel particles. Thus, the the normal or idle position of the valve stem. 'I'he structure of the vaporizing means proper upper end of the sleeve 56 has screw threaded to which the primary air and fuel passageways _thereonto _an elongated discharge _cap 15 which 2| and 31 respectively lead, may best be seen in may be held in any position of axial adjustment Fig. 2. The inner or free end of the tube 28 by such means as a lock nut 16. The cap has a supports in axial alinement therewith a relatively cylindrical side wall 82 in which an annular series elongated tubular sleeve 56. Internally the sleeve of spaced slots 11 (Figs. 2 and 4) is formed, which has enlarged chamber 51 into which the tube slots in assembly are located immediately above I9 extends a short distance beyond the end of the the upper surface of the element_13. The slots 10 are also formed generally on a spiral angle as l tube 28. 'I'his end of the tube I9 carries an en largedv head 58 having a tapered external sur- _ in the case of ‘the element slots 14 and the _whirl face 59 for abutment with a complementary sur face 60 provided internally of the sleeve 56 at the outer en`d of the. chamber 51. The external sur face of the head 58 is mutilated or cut away at ing action of the volatilized fuel mixture causes an inward flow of secondary air through the slots 11 and into the fuel mixture. 15 At its upper end the cap is closed by a coni a number of equidistantlyv spaced points (see 6I, Fig. 5) to provide clearances 62 between the op posing surfaces of the head and sleeve through 20 which air may flow from the chamber 51. cally shaped head 18v which extends annularly beyond the cylindrical side wall to form a flange ,19. 'I‘he head also has a series of slots 88 therein formed to discharge the fuel mixture into the in 20 terior of casing section l2 and toward the lintake manifold on a spiral angle. The annular flange 19 faces away from the intake manifold I0, and is dimensioned to form with the surrounding Wall Axially the head has a tapering bore 63 which co operates with a needle valve 64 of substantial length formed upon the end of a valve stem 40. It is preferred to employ an elongated needle valve in order that the flow of liquid through the bore 63 may be accurately controlled` by minute increments. l ' , Surrounding the emission mouth of the bore 63 is an annular flange 65 constiîutinga tip which 30 internally is fashioned to define an‘ outwardly flaring liquid fuel> nozzle 66.' About the flange 65 the sleeve 56 is internally enlarged to provide an air chamber 61 surrounding the flange _and com municating with the clearances 62 and the en largement is terminated rather abruptly by a shoulder 68 located about on the line of the mouth of the nozzley66. The shoulder defines an annular port 69 about the nozzle and from the shoulder the internal wall of the sleeve 56 flares sharply, as indicated at 18, and then terminates in a cylindrical portion 1I. The walls 18 and 1I of the tubular casing a passageway 8| for `the remaining part of the secondary air stream. It is preferred, in order to prevent condensa tion ofthe vaporized fuel, to provide sharp edges . at the discharge ends of all of the passageways through whichrthe vaporized material flows. Air 30 expanding through an >opening or port having blunt edges creates turbulence or eddy currents around the port which do not prevent' the con densation of vaporized fuel due to the cooling ac tion of the expanding fuel stream as it issues 35 through the port. By providing a substantially knife edge around the port, the expanding ñuid discharged therefrom induces a flow of air along the knife surface outside of the stream and into the stream to draw into the stream any particles 40 tending to condense. Thus, the annular flange define a volatilizing chamber 12 in which an ex 65 and the slots 14 and 80 are fashioned to pre ceedingly fine atomization of the fuel stream dis charged from the nozzle 66 is attained by the action thereon of the air stream issuing through the port 69. -To produce an intimate mixture of air and fuel particles, aswell as further to insure a complete reduction of fuel particles substantially to a dry, smoke-like gaseous state, means is provided for discharging the vaporized fuel from the chamber 12 in a plurality of relatively small streams and sent substantially knife edges at the discharge sides thereof thereby minimizing condensation. Referring to Figs. 1, 6 and 7, liquid fuel is de 45 with a whirling action. In this instance, an an nular element 13 somewhat in the shape of a . hollow cone is fixed in the outer end of the sleeve livered to the fuel nipple 35 ‘through a conduit 84 which is connected with a conventional type of fuel pump 85 and ñlter 86. It may be desir able to preheat the fuel before _delivery to the carburetor, and in this embodiment this end is 50 attained by forming an intermediate coil 81 in the conduit, enclosing said coil in a leak proof casing 88 secured to the exhaust manifold ll, and diverting a portion of> the hot exhaust gases through the casing 4by such means as a cap 89 55 56 to traverse the end of the chamber 12 and this in the exhaust manifold communicating with the- ` element has a circumferentlally spaced series of casing through an intake slot 98 and a similar cap 9| having a discharge slot ‘92 therein for re turning the gases to the manifold. To produce radially extending slots 14 (Figs. 2 and 3) therein. These slots are quite narrow and are cut through circulation through the casing 88, the intake slot 60 which herein is the slot 9i) faces toward the gas flow through the exhaust manifold while the `other slot 92 is oppositely faced. The construction and arrangement of parts a spiral angle so that a circular whirling motion by which the admission òf secondary air is ef 65 of the stream results. Preferably the central por fected and controlled will now be described. 'I'he tion of the element is imperforate (see Fig. 3) face of the tubular >end I4 of casing section I3 is the element in planes which extend transversely of rather than parallel to either the axis or radius of the element. In other words, the stream issues from the slots in a direction which is neither axial nor radial but is generally along to eliminate a direct axial flow. 'I‘he secondary air stream is, as Will `become ap-. parent, introduced into the housing to flow up wardly about the vaporizing means toward the ' intake manifold. At least a part of the secondary air is preferably introduced into the circular whirling stream of vaporized fuel whereby to util ize the violent tubulence to effect an intimate beveled, as at 93 (Figs. l and 8), to form a valve seat for _a circular secondary air valve 94. The valve is supported for axial reciprocatory move ment in any suitable manner, as by a curved arm 95 projecting endwise from the casing and having an axially alined bearing 96 for a stem `91 on the valve. A nut 98 onv the stem adjustably limits the closed position ofthe valve while a 4 2,128, 132 spring 90, about the stem and exerting its force between ' the valve and the bearing, normally urges the valve toward its seat. cam counterclockwise or advances the cam to open the valve, thus admitting additional sec ondary air in proportion to temperature increase. The type of valve herein shown is capable oi' ~ Experimentation will determine the proper re controlling the admission of air with exceeding lationship between the several forces involved, accuracy and the actuating mechanism therefor as well as the speed of the cam and the shape is likewise accurate in its operation of the valve of its surface so that the increased volume of whereby the volume of secondary air admitted secondary air admitted as temperature increases may be varied in proportion to the quantity of 10 fuel introduced with unusual precision to produce will be in proper proportion to the fuel to pro duce an efficiently explosive mixture at any tem at all times the most eillciently explosive mix perature. If the temperature decreases, the ther ture. In this embodiment, a shaft |00 extends unit, of course, has an opposite action to horizontally through the opposite side walls of mal decrease the volume of admitted secondary air. the casing immediately adjacent to the inner Should the shaft |00 be rotated, such movement face of the valve 94. At one end the shaft is is transmitted to the cam through the strip |06 - joumaled in the associated wall. The shaft car and the sleeve |0| without disturbing the ther ries an elongated sleeve |0| which is loose on mally adjusted relationship between the shaft the shaft and is journaled in the other casing and cam. ‘ wall. The sleeve extends inwardly approxi The assembly on the shaft |00 may be main 20 mately to a point opposite the center of the tained against endwise movement in any suitable 20 valve 94 and on its inner end has a cam |02 manner as by the actuating connections to and fixed rigidly thereto for engagement with the from the shaft. If desired, an air filter of con-' adjacent face yof the valve. The shape of the ventional form may be connected with the sec cam is accurately predetermined to produce an 25 accurately graduated opening and closing of the ondary air inlet, as illustrated in dotted outline in Fig. 1. valve upon rotation of the sleeve. Herein the manipulable means by which the The present invention embodies a temperature operator conventionally controls engine opera control means for automatically varying the ad tion is represented generally by the end of a mitted volume of secondary air as such adjust 30 ment becomes necessary during operation of the power transmitting connecting rod H0 (Fig. 1) a thrust being theA valve opening movement. device whereby to maintain the explosive mix This rod is suitably connected through a link | | | ture at its maximum eiiiciency. For example, with the shaft |00 inlsuch manner that a push or in internal combustion engines tlie carbureting pull on the rod ||0 rotates the shaft correspond mechanism is usually set for operation at an ingly to open or close the secondary air inlet 35 average or mean temperature. An eilìciently combustible mixture at this temperature will not, however, be eillcient at a different temperature. Hence, while the engine is heating it is operating inefliciently, and atmospheric temperature changes have the same effect. The present temperature control. means em bodies a lost motion connection between the valve. Such operator controlled movements are also utilized to actuate the fuel inlet valve 64 and _the primary air inlet valve 30. Referring to Figs. 6, 7 and 10, the end of shaft |00, opposite that to which link ||| is connected, is engaged by a split clamping member ||2 which 40 has a longitudinal screw threaded extension ||3 thereon. Preferably, both ends of shaft |00 are shaft |00 and sleeve | 0| which, while it allows serrated to provide a non-slipping connection the sleeve to be moved by the shaft, also permits ~with the associated parts. _ The extension || 3 of independent movement of the sleeve accord engages a nut ||4 which is pivotally supported ing to the action of a thermally responsive de between the arms | l5 of a yoke || 6 forming the vice. Referring to Fig. 11, the side face of the cam |02 at the end of sleeve |0| has a sector shaped recess |03 therein. The sleeve |0| is cir cumferentially cut away through that part which opposes the recess to allow a pin |05, rigid with the shaft |00, to extend into the recess, A spac ing sleeve or collar interposed between the end of the sleeve |0| and -the casing wall maintains the centered relationship of the valve and cam and also substantially closes the open face of the recess |03. As shown in Figs. 8 and 9, the shaft beyond the outer end of the sleeve has one end of a spirally wound bimetallic thermally re 60 sponsive strip |06 secured thereto, as at |01. The other end of the strip is fastened rigidly to the sleeve, as by the adjustable clamping device |00. 'I'he operation of this particular part of the mechanism maybe best understood byconsidering 65 that the cam |02 will normally be rotated in a counterclockwise direction to open the valve. The mechanism being properly adjusted for eili cient operation, the pin |05 at'minimum tem perature engages one end of recess |03 (the low er end as the parts are shown in Fig. 11). Coun terclockwise movement of the shaft to open the valve will accordingly be transmitted to the cam through the pin |05. As the temperature increases, the bimetallic strip is arranged to ex 75 ert a force on the sleeve |0| which rotates the upper end of an actuating link assembly, gener- . ally designated ||'|. The link assembly depends from the nut ||4 and at its lower end terminates in a head H08 which is receivable between the arms of the needle valve actuating lever 5| and is plvotally secured thereto, as shown at H9, at one of several positions provided along the length of the lever. This adjustment, together with that provided by the nut ||4 and extension H3, serve generally to establish the desired operating rela tionship between the shaft |00 and lever 5|. How ever, a finer and more accurate adjustment is usually necessary and means has been provided for attaining this end with micrometer-like ac curacy. To this end, the link assembly ||'| is formed in sections. The lower section |20 which carries the head ||8 and is connected with the lever 5| has 4 an externally screw threaded upper end as shown in Fig. 6. An intermediate section |22 is tubular and one end thereof has a swivel connection with a stem |23 on yoke || 6, said yoke being the third section of the link assembly ||'|. 'I'he opposite end of the tubular section |22 is internally screw threaded for ermagement with the screw threads of the lower section |20. This end of section |22 is slotted as shown at |24 (Fig. 10), is externally tapered, andy is 'screw threaded for engagement by a complementary nut |2| carried by section 75 5 2,126,132 V I 20.k Thus, when section |22 and nut I2| are dis connected, the tubular section I2'I may be screwed and air-so that the stream which issues through the slots 80 is practically a dry, uniformly atom onto or of! of section |20 to increase or decrease ized mixture of fuel and air. . the effective length of the link assembly II1, after which the adjustment may be definitely and - ñrmly maintained by engagement between section |22 and nut I2 I. Thus, the overall length of` the link assembly H1. may be `readily increased or decreased and such adjustment may be made 10 vwith exceeding accuracy. Actuation of the shaft |00 by the operator will, therefore, be effective through the above described connections to open and close the needle yvalve 64 as the secondary air valve 94Jis corresponding 15 ly actuated and the intermediate connections are so accurately adjustable that the most efficient proportion of secondary air to fuel may be ob tained. » - - i The primary air valve 30 is controlledv by the 20 movements of the lever 5I by such means as a` link H25 (Figs. 6 and 7) connected at one end with the radial arm 32 on the primary air lvalve stem 3l and _at the other end with lever 5l. This connection is adjustable but exceeding accuracy 25 thereof is not so necessary since the volume of primary air admitted is relatively small and is only suilicient to produce an efficient vaporization' of the fuel. In adjusting the device for operation, the fuel " 30 valve 64 and the primary air valve 30 are setto a normal, slightly open position which determines the idling or minimum' speed of operation of the engine; The adjustments are correlated in such manner that at the idling speedthe fuel which. 35 is introduced will be acted _on by just that volume of primary air necessary to produce a complete atomization of _the fuel. The secondary air valve 94 is valso adjusted to an‘initial slightly open po « As the stream issues from the slots 80, the whirling motion previously imparted thereto is C7. continued and is generally in the direction indi cated by the arrows A. The relatively restricted and obstructed passageway 8l causes the sec ondary air stream to converge inwardly, as indi cated by the broken lines B, as it passes the 10 flange 19 to meet the diverging fuel mixture stream. Consequently a final thorough mixing of the fuel and air streamsoccurs as the fuel mixture travels to they intake manifold to pro duce a mixture which is in its most eñiciently. 15 combustible state. Variations in secondary air requirements, caused by increasing or decreasing temperature, are met by the action of the thermally responsive means associated with the secondary air valve. 20 Consequently, the proper volume of air is mixed with the fuel and the fuel cannot vary from a too lean to a too rich mixture because of tem perature changes. » The cam actuator for the secondary air valve 25 and the elongated needle valve permit the ac tions of these two Valves to be accurately corre lated and the proportion of the substances ad mitted can be deñnitely adjusted and main tained. :sov ` The purpose of the container 26 is to receive excess and unused fuel which might occasionally pass from the fuel duct, as would possibly oc cur when the engine is stopped. , Such fuel drains downwardly through the primary air passage ways 2l and 23 and into the container where it is retained until the engine is started. There upon the initial lloW of primary air will, as it passes the mouth of induction tube 21, draw the ~ sition, such as will produce an efñciently com 40 40 bustible mixture of fuel and air at a predeter- f fuel from the container and ‘discharge it from the vaporizing device to produce a rich fuel mix - minedaverage temperature, which may be ap proximately the minimum ytemperature at which the engine will be operated. ' ' , , These adjustments having been made, fuel is 45 Adelivered from the pump 65 by conduit 84, duct 36, and passageway 31 to- discharge through the ta pering bore 63 and nozzle 66. Primary air is drawn into the device through- port 34, bore 33 in air valve 30, bore 28“, passages 23- and 21,* chamber 51, clearances 62 and chamber 61 to dis charge into the volatilizing chamber 12 through the restricted port 69 which closely encircles the fuel discharge nozzle 66. The force which causes » such primary' air flow is the diminished pressure 55 in the intake manifold and in some measure the inductive action of the discharging fuel stream. The wall which defines the fuel discharge nozzle flares outwardly (see Fig. 2) to produce a diver gent discharge of fuel into~the encircling air stream whereby to produce a violent turbulence in the volatilizing chamber with the result that the fuel stream is broken up into exceedingly finely divided particles. This volatilized fuel then passesfthrough the slots 'i4 in the element 65 13 and the several streams issuing from the slots encounter the internal wall of the cap ‘l5 and -a whirling action within said _chamber results. This motion serves to draw secondary air through the slots 'l1 and an intimate mixture of the streams 70 is produced. The passage of the fuel and air mix ture through the slots, together withnthe subse quent mixing of the vaporized fuel with a part of the secondary air, completes the atomization of the fuel into its finest possible state and pro 2 duc-es a completely homogeneous mixture of fuel ture. Consequently the action is similar to the Operation of choking an engine in starting. The present device has been illustrated as be ing of the type known commercially as an “up draft” carburetor. 45. However, without substan tial modiiication it will also serve effectively as a “down-draft” carburetor, it being necessary merely to turn the device upside down through 180°. Of course, in the last mentioned position 50 the container 26 and its associated induction tube are not required since any unused fuel will iìow to the intake manifold and be available there in starting. ` yIt will be seen moreover that the present de 55 vice is capable of operation in positions other than a. vertical one. Consequently this carburet ing device may be readily adapted for eiiicient operation on a great variety of engine and like constructions. 60 ‘ I claim as my invention: 1. In a device of the character described, the ' combination of a chamber having an outlet, means for delivering an atomized mixture of fuel and air to said chamber for discharge from said outlet, a member in said chamber having slots extending generally radially and formed on an angle. more nearly transverse of the axis of the chamber than parallel for imparting a> whirling action to the mixture, means for im parting a whirling movement to the streamflow ing from said outlet, a casing in which said chamber is located and into which said stream is discharged, and means for delivering air to 6 8,126,132 said casing for discharge into the whirling fuel stream. 2. In a carbureting device of the character de scribed, the combination of an air intake, a valve for controlling the volume of air> entering through said intake, means mounted adjacent the valve for controlling said valve and including a coaxial shaft and sleeve, a cam mounted on said sleeve and arranged to move said valve to open posi 10 tion, actuating means for rotating said shaft, and thermally responsive means connecting said shaft and sleeve for joint rotation to move said cam and thereby adjust the position of said valve for various operative conditions, said thermally 15 responsive means being movable due to variations in temperature for effecting relative rotation be tween said shaft and sleeve to shift the circum ferential position of said sleeve and cam on the shaft to move said valve for variabiy governing 20 the volume of air admitted into said intake in any adjusted position established by said actu ating means. ` 3. In comblnation‘in a carburetor construction of the character described, an elongated fuel de livery passage having a restricted discharge port, a needle valve for accurately controlling the dis charge of liquid fuel from said port and having a valve stem extending therefrom to the opposite end of said passage, a primary air passage hav~ ing its discharge end coactive with said fuel discharge port to produce an atomized fuel-air stream, 'a valve for controlling the ñow of pri mary air through said air passage, a secondary air passageway arranged for supplying a, large volume stream of air to combine with said fuel air stream to produce an efficient combustible mixture, a valve for controlling the volume of air ilow in said secondary passageway', means for adjusting the secondary air valve including an operating shaft and means for actuating the saine, a lever operatively associated with the end of said needle valve stem for adjusting the same longitudinally and having an adjustable con- nection with said shaft for operation thereby, and means connecting said lever with said pri mary air valve for effecting adjustment of the latter simultaneously with said needle valve. ' JENS A. PAASCHE.