US1761007A

US1761007A - Carburetor for internal-combustion engines

Info

Publication number: US1761007A
Application number: US755296A
Authority: US
Inventors: Claudel Charles Henri
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-10-24
Filing date: 1924-12-11
Publication date: 1930-06-03
Anticipated expiration: 1947-06-03

Description

June 3, 1930. f c. H. CLAUDEL CARBURETO FOR INTERNAL GOMBUSTION ENGINES 2 Sheets-Sheet Filed Deo. 1,1, 1924 IIIIIII June 3, 1930,

c. CLAUDEL CARBURETOR FOR INTERNAL COMBUSTION ENGINES g Sheets-Sheet 2 Filed Dec. ll, 1924 Patented luide13,4193@ i Unirse sra-rss earan'rorricr. Y 7

CHARLES'HENRI CLAUDEL, or NEUILLY-sun-sarivn, FRANCE? I CAR-BURETOB FOR INTERNAL-COMBUSTION ENGINES Y .Appli'catian ianeqemberii, A1924i, serial No. 755,299, and in France october e4, 1924. Y

The present invention relates to carburetors for internal combustion engines fand has for its object to render the essential parts of a carburetor readily accessible and` readily removable and replaceable, so that theyV may be inspected and cleaned v with great facility.`

According Ato, the invention va carburetor, comprising a 'system of nozzles communicating freely with an air inlet passage and carried by a removable hollow connecting member `fitting tightly into afloat chamber, is provided,'in` which the vfloat chamber and the body ofthe carburetor containing the air inlet passage are in one piece the connecting V member which isadapted to engage Ywith i' the body containing .the air inlet passage without being secured therein beingsecured to the oat chamber by an assembling bolt traversing the chamberjaxially and capable of being dismounted without removing the Y float annularly disposed ar-ound the bolt'.V

, According to a further feature of the invention the assembling bolt, which isl also utilized vfor securing the cover of the float chamber in position as has previously been proposed, contains axially arranged therein la screw having, at its lower end, a fuel passage, which, contrary to known arrangements, is not regulated by a needle or any other valve but is constituted by av calibrated orifice adapted to control, the supply of liquid fuel from the float chamber. Still further features of the invention will be apparent from the following description and will be set out arated or dismounted. y Figure l isa sectional view on the line (3,1) of Figure 1, showing the slowspeedregulating screw; and Figure 5 5y is a plan view of the device drawn tothe same scale as Figure 2; FigurelfL is a View l50 illustratmg a portion of Figure'l on a larger scale.

Y Figure 6 is a view illustratinganother por-i` i tion of Figure 1. Figure 7 is an axialy sectional view of a portion of a -modiiiedfform of the device in which the calibrated slow-speed lorifice is situated at a point between the axis of the nozzles and theV float chamber, and is thus made more readily accessible; Figures 8 and 9vare partly sectional: views of modified 60 forms ofthe device in which the calibrated slow-speed orice is transferred to the centre line of the float chamber, or close to the same, in order that it -shall'be unaifected by vari'ations inthe inclination of the carburetor, 65 While being supplied through themain cali, brated orice and being removable independently ofthe latter. Figure lOillustrates a device in which the calibrated, slow-speed orice, which is coaxial 'with the main cali- 7D brated orifice, is removable together with the latter.

Referring now to Figures 1 vto 6, it will be seen that a carbureting chamber l, ioat chamber 2 and atmospheric inlet passage 3 arey vformedin a single piece. Y, A fuel nozzle device 1s connected withthe 'float chamber by means of a member 5 having'l va suitable connectingtub'e 5 provided therein. The member 5 vserves to support thelncz- 80 zle device and is secured in position by means of a special assembling bolt 6 disposedalong the centre line of the float chamber, this bolt also serving to secure a rotatable cover?V com-V prising a pipe coupling device 13 for the ad- 85 mission of liquid fuel to the Vfloat chamber, a filter 14 and needle valve 15 controlledV by a float 16. yThe bolt 6 is hollow and contains a' p screw 8 having a milled head at vits upperlend andvshaped at'itslower end as illustrated in 90 einem Figure 1a. rlhe screw 8 is provided with a head t having an internal chamber into which the fuel flows from the float chamber, through lateral orifices 9 formed in the bolt 6, and through'the annular space l etween this bolt and the head t and through the orifices 9 provided in the walls of the latter. rllhe head t cooperates with a seat formed in the lower bored part of the bolt 6 below the orifices 9, and a calibrated oriiice 10 is formed in this head. When the head t rests on its seat, liquid fuel is supplied to the tube 5 in the member 5 and consequently to the fuel nozzle device which comprises a normal speed nozzle 17 and the slow-speed nozzle 11, the latter being su plied through a calibrated slow speed orifice 11', The slow speed nozzle device is secured by a member 12 removably mounted in the member 5, as shown in Figure 3. rlhe normal speed nozzle 17 is screwed into an element having a hexagonal portion 4t as-illustrated in Figure 3, which contains the conduits of theV main fuel nozzleand is screwed into the support 5. The whole device comprising the nozzle 17 can thus be removed together with the member 5by detaching the bolt G, and can then be separated if desired from the member 5 by unscrewing the element comprisingl the hexagonal portion 4l.

A tapered element 21 serving to correct the air supply is controlled by an externalk handle 22 and is guided atits lower end by a tube 24 screwed or otherwise secured to the air inlet 3, and in view of this construction, the. noz-` `zle:17 can readily be removedor replaced.

The air supply at. slow speed isregulated bymeans of a double screw (Figs. 1 and 4.). A screw 19 with milled head 19 is screwed into the body of the carbureting chamber 1,r

. 20', the end of the screw being movable lengthwise so as to close more or less a passage extending centrally through the barrel for the admission of air when operating at slow speed,.that is, in the closed position of the barrel 18.

A particular feature of the invention con sists in the joint providedbetween the Hoat chamber 2 and the support 5 whereby the device may be cleaned by emptying the said chamber. As shown in Figs. 1 and 5, the socket 25 of the support 5 entering the aperture in the bottom of the chamber 2 is provided with a plurality of longitudinal grooves 25'; the joint between the main body 5 and the chamber 2 is made fluidtight by a paching washer 2G which is tightened by means of the screw 6. The Afloat chamber can be cleaned by loosening said screw, whereby the liquid in the bottom of the chamber together with all the impurities which it contains will flow out through the grooves 25.

It will be noted that the screw 8 together with the main calibrated orifice 10 can be inspected or replaced and may even be removedv if the barrel 18 is in the closed position, while the engine continues to run at slow speed, since combustible iiuid-is freel supplied through the passage in the support 5 to the oriice 11 of the slow speed nozzle 11.

The cover owing to its particular construction may be removed for the inspection of the chamber merely by removing' the bolt 6, i. e. even during the slow speedrunning.

As shown in Figures 1 and 6 the apparatus may be enabled' to: operate inthe most favorable conditionsat low temperatures. The connecting tube15f'wvithin-the support 5 is surrounded by a free space 28 forming a 'jacket for the circulation' ofa heat-ing agent which enters through the

Vorifices

29, 29 and is discliargedthrough theorifice 30. It will be observed thatthe conduit connecting; the main calibratedzorifice with the fuel nozzle as weil asthe .baseof the fuel. nozzle, will be the only parts heated by the small quantity of. heating. fluid, which may consist` of the water or the. cooling. mediuinservingto cool the engine to. which the carburetor is supplying. combustible mixture, or. of the water or other fluid whichv has: been: heated by contact with the exhaust. piping.V

SinceV the iioat chamber'itself. is-not heated. it will continuev to operate normally even: when the temperature ofthe heating medium rises to. an abnormal extent.. Furthermore, since the. nozzle device itself is heatedby direct conductionffrom itsbase, the device is not liable to beffrozen'.Y Y A A Fig. 7 shows a modiiication. iny whichy the calibrated slow-speed'oriice is situated-at 11a, while theslow speedfuel nozzle 1.1A as the. construction above describcd'pis disposed coaxially with the suction? conduit. The: calibrated. orifice lla is situated at the endf of a bolt 81, which is constructe'dlin. an analogous manner to the bolt 8 shown iniFig. l and in order to change. the said calibrated slow-speed ori.- ticev it is only-necessary to-remove the bolt 31.

Figs. 8` and 9 show further'modifications' in which the calibrated orifice 11G, is situated upon or ne'arf the centre line ofthe float chamber so that its output will be unaffected in the same'manner asth'aft of the main. calibrated orifice by any inclined positions assumedby the apparatus. in Fig. 8,- the support 5 comprises two` ductsv 38 andl 3l; the: duct 33 connects the main calibrated orificev l0 with the compound nozzle 17, andtheduct 3l connects the slow-speed: calibrated oriice. llb with the slow-speed sprayer l1 gthecalibrated orifice 11:1, iscarriedA by a low-speed nozzle 11'; the calibrated oriicc 11"bl1ieing formed in the screw 32. which iscoaxial with the said chamber, while:thernodication'.ile4

lil)

lustrated in Fig. 9 consists simply in that'the screw 32 is disposed in a horizontal position,

In these two figures, as well as in the preceding, the two calibrated orifices can be remove-d separately, and may be arranged 1n series, as shown, or in parallel, so that the main orifice may be changed while the motor is run-v ning at slow speed.

F ig. l0 shows an arrangement in which the calibrated slow speed orifice is removable at the same time as the main'orifice 10. For this purpose, the bolt 6 has for instance a recess 35 formed in its lower portion, a plug 36 having the calibrate-d slow speed orifice 1lb formed therein being slidably disposed in this recess, and held by a 'spring 37 upon a seat which separates the two

ducts

33 and 34. To provide for the removal of the plug 36 together with the main orifice 10a detent pin 38 forms a support for the plug 36, so that the latter ismaintained in its recess, attached to the screw 6, and may thus be removed with the latter.

Obviously the arrangements hereinbefore set forth are applicable to other types of carbureting devices, such as those comprising Vbutterfly throttling devices or the llike and fuel nozzles disposed in series as shown or in parallel. Y

j What I claim and desire t0 secure by Letters Patent is: Y f

l. A carburetor comprising` in combination, a carburetor body and float chamber solidly joined together,aremovable cover cap fork said float chamber,` a removable hollow connecting member fitting tightly on one side within the bottom of said ioat chamber and laid on other side on the bottom of said carburetor body, a removable hollow assembling bolt fitted through said cover cap and the float and screwed in the corresponding end of said hollow connecting member and a system of spray nozzlescarried by the other end of saidhollow connecting member and eX- tending into the vaporizing chamber of the carburetor through a suitable orifice.

2. A carburetor comprising in combination, a carburetor body and float chamber solidly joined together, aremovable cover cap for said float chamber,`a removable hollow connecting member fitting tightly on one side within the bottomof said float chamber and laid yonother side on the bottom of said carburetor body, a removable hollow assembling bolt fitted through said cover cap and the float and screwed inthe corresponding end of said hollow connecting member and a system of spray nozzles carriedby the other end of said hollow connecting member and extending into the vaporizingchamber of the carburetor through a suitable orifice, a removable boltprovided inside said hollow assembling bolt and a calibrated `main orilice provided inthe lower part of said inner bolt positional between the interior ofthe niovable ioat chamber and the hollowpart of saidk connecting member.

3. A carburetor comprising inrcombination, a lcarburetor-body and float chamber solidly' joined together,'a removable cover cap for said float chamber, a removable hollow connecting memberA fitting tightly on one side within thebottom of said float chamber and laid on other sideronthe bottom of said carburetor body, a removable -lhollow kassembling bolt` fitted through said cover cap and the fioat-and screwed in the corresponding end of said hollow connecting member, a main spray .nozzleremovably connected to the other end of'said hollow connecting member n and extending into the vaporizingV 'chamber of the carburetor, and a separately tending into the vaporizing chamber of the carburetor, and a separately removable slow speed spray nozzle lodged axially within said main spray nozzle, and a tubular vsection secured to the vaporizing chamber around saidmain nozzle, and an air controller slidably mounted on said tubular section and said main nozzle.

5. A carburetor comprising in combination, a carburetor body and ioat chamber solidly joined together, a removable cover cap for said fioatchamber, a removable hollow connecting member fitting tightly on one side within the bottom of said float chamber by a socket'provided upon said connecting member and laid onother side on the bottom of the carburetor body, peripheral grooves upon thek outerfaces of said socket, a rehollow assembling bolt fitted through said cover cap and the float and screwed. in the corresponding end of said hollow connecting member and a system of one side within the bottom of said floaty chamber and laid on other side on the bottom of said said carburetor body, a heating` jacket in sadeonnectng member, L removable hollow assembling bolt tted through Said cover Cap and the float and screwed in the corresponding end of said hollow conmeeting member and a system of spray noz- Zles carried by the other end of said hollow connecting member and extending into the vaporzng chamber of the carburetor through a suitable. orifice.

In testimony whereof I have hereunto set my hand.

CHARLES HENRI. CLAUDEL.