US1870663A - Carburetor - Google Patents

Description

Aug. 9, -1932. s. K. WOOD ET AL GARBURETOR Filed May 21, 1928 INVENTO I W170i ma JCZ/[Lig A TTORNEYS.

Patented Aug. 9, 1932 UNITED STATES- rants.

PATENT orrics STRAUID K. WOOD, 01 DENVER, AND JESSE KING, OF LA JUNTA, COLORADO CAR-BUR-ETOR Application filed May 21,

cylinders a combustible mixture without previous compression thereof.

One object of the invention is to produce a carburetor having a vaporizing chamber of which the outer wall is subjected to the heating action of the exhaust gases of the engine,

and in which the liquid fuel is discharged against said wall to be heated and thereby facilitate and make more thorough the vaporizing action and the charging of the air with hot vapor.

A further object is to provide means actuated by the suctional force of the engine, for imparting a whirling action to the mixture of air and hot vapor to insure practically instantaneous and intimate and uniform mixture thereof and thus provide for more perfect combustion in the cylinders and easier and quicker starting of the engine in any kind of weather.

WVith these general objects in View and others as hereinafter appear, the invention consists in certain novel and useful features of construction and combinations of parts as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawing, in which:

Figure 1 is a central vertical section of a carburetor embodying the invention. 2

Figure 2 is a horizontal section taken on the line AA ofFigure 1.

In the said drawing, 1 indicates a chamber, 2- an air passage leading to said chamber and controlled by a choke valve 8, the shaft 4 of which is adapted to be connected in any conventional manner to the dash of the car so that it may be convenientlyturned for adjustment of the choke valve. A gasoline chamber 5 has a float 6 which is for the performance of the customary function and hence the conventional connections for controlling the supply of gasoline are omitted, V

the gasoline chamber having a depending tubular stem 7 having lntake openings 8 guarded by screens 9 for excluding forelgn 1928. Serial No. 279,492.

particles from the gasoline chamber. A cup 10 encloses the depending stem 7 and is provided with a gasoline-intake nipple 11, for connection with the gas supply, not shown. he cup is clamped in position against the bottom of the chamber 5 by a screw 12.

The gasoline chamber 5 is partitioned from chamber 1 as at 13, except for the provision of a passage 14 leading to a tubular jet-post 15 mounted in chamber 1. The post is provided with a shelf 16 and with a valve seat 17 controlled by a needle valve 17 mounted in the bottom of the chamber.

A cylindrical casing 18 is arranged in superposed relation with respect to and communicates at its lower end with chamber 1, and is provided at its upper end with an outwardly projecting flange 19. Within the casing is a Venturi-tuhe 20 for the purpose of increasing the speed of air flow and hence suctional force within the casin Vertically above and spaced as at 21 from the upper end of casing 18 is a cylindrical casing 22, and around the lower end of said casing is formed a skirt portion 23 which fits around and is secured in any suitable manner to the peripheral edge of flange 19, the space between the lower end of the casing 22 and the enlargement or skirt 23 providing an annular vaporizing chamber 2 1- which communicates with the passage of casing 22 through a series of vapor-inlet openings 25.

The skirt portion of casing 22 is surrounded by a passage 26 for hot gases, such as the exhaust gases from an internal combustion engine, not shown, one end of the passage having an opening 27 which constitutes an inlet for such gases from the exhaust manifold (not shown) and the other end an opening 28 which constitutes an outlet for the exhaust gases. It will thus be seen that the passage 26 forms an adjunct of the exhaust conduit of the engine and that the hot gases passing therethrough will heat the skirt portion for the purpose of transforming any unvaporized fuel entering the chamber 2 1 into vapor.

Above the plane of the openings 25, is a spider or cross bar 29 forming a firm support for a vertical oiling spindle or tube 30 carrying an agitator or fan consisting of a band substantially closing the space 21, and a series of lnchned blades 36. The sleeve has a partition formed with a hearing socket 37 conforming to and engaging the conical end of the oiling tube for centering purposes, and for receiving oil from the orifices to insure the rotation of the sleeve without undue friction. The arrangement is such that the suction produced in the engine cylinders and intensified by the Venturi tube, will effect rapid rotation of said agitator or fan, for a purposegwhich hereinafter appear p A plurality of tubes 38 communicate at their lower ends With a socket or chamber 39 in the lower end of the sleeve. At their upper ends the tubes are secured in and project outwardly through the band 35 for the purpose of discharging liquid gasoline against the wall of the skirt, which as stated, becomes highly heated I and thus instantly converts such gasoline into vapor. The socket 89 receives the upper end of the post 15, and when the latter is at rest, the'sleeve stands upon the flange 16 of said post. When the engine is in operation the suction will tend to lift the sleeve slightly so that free running of the fan or agitator is permitted, the lift .being slight so that buta minor flow of air will enter the socket 39 and pass with the. liquid fuel from the post, up through the tubes 38 to the vaporizing chamber 24. p

' Within the casing 22, constituting the mixing chamber, is the throttle valve 40 and communicating with said chamber. above the said valve whenthe latter is pra'ctically'closed is an idling fuel-jetsupply nipple 41, connected by a tube 42 with a well 43 in communication with passage 14:. ,To regulate the quantity of gas permitted passage to the 'mixing chamber, the tube 42 is sectional and one sectionhas an air-inlet orifice 44, a coupling 45 being adjustable on the tube at the joint thereof and having an air-inlet orifice :16, the coupling'being capable of suchad- Justment as to effect full or partial registration of orifices 44 and 46, or of entirely clos ing the former to prevent any air entering the mixing chamber in the event it is desired to to enrich the whirling combustible mixture I passing up through the mixing chamber.

As thefunctions of the different parts of the carburetor have been set forth in connection with the description thereof, it is ber.

believed no recapitulation of the operation is needed, other than to call attention to the fact that the speed of the engine governs the centrifugal vapor suction force exerted at the upper ends of tubes 38, that a more perfect combustible gas is obtained through the preheating of the vapor and its mixture while hot, with the air, it being also desirable to emphasize the relatively remote position of the heated part from the gasoline chamber of the carburetor, as minimizing danger of fire or explosion. It will be understood that variouschanges of construction may be resorted to without departure from the principle of construction and mode of operation involved or from the spirit and scope of the appended claims.

lVe claim:

1. In a gas mixing device having an'air chamber, a mixing chamber in communication therewith, a gasifying chamber around the mixing chamber, a heating chamber adapted to be heated b exhaust gases of an engine around the gasi ying chamber to heat the same, a fan in the mixing chamber rotated by the passage of air from the air chamber through the mixing chamber, and ne or more fuel-supply tubesrotatable with the fan and discharging into the gasifying.

2. In a gas mixing device, an air chamber,

a casing communicating therewith, a second casing in communication with the first casing and constituting a mixing chamber, a gasifying chamber around the second casing, the latter having openings communicating with the gasifying chamber, a heating chamber around the gasifying chamber to heat the latter, one or more fuel supply tubes projecting into the gasifying chamber to discharge fuel therein, and means for effecting revolving action of the fuel supply tube or tubes around the axis of the mixing chamber. 7 I

3.111 a gas mixing device, anairchamber, a. casing communicating therewith, a second casing in communication with the first casing and constituting a mixing chamber, a gasifyingchamber around the; second casing, the latter having openings communicating with the gasifying chamber, a heating chamber around the gasifying chamber to heat the latter, one or more fuel supply tubes projecting into the gasifying. chamber to discharge fuel therein, andmeans for agitating air-in its passage up through the casings for mixing with the vapors entering the second casing from said gasifying chamber, and means for revolving the fuel supply tube or tubes around the axis of the mixing cham- 4. A gas mixing device comprising an air chamber, a casing communicating therewith,

a second casing communicating with and spaced from the first casing, and provided with a series of openings, a gasifying chainber around the adjacent ends of said pair of casings and the space between the same and the series of open ngs in the second casing, heating means for said gasifying chamher, a fuel jet, a suitably journaled sleeve fitting around and communicating with the fuel jet, a fan or agitator rigid with the sleeve and substantially closing the space between the two casings, and one or more fuel pipes secured to the sleeve and to said fan or agitator for receiving fuel supplied by the jet and conducting it through the space between said casings into the gasifying chamher.

5. A gas mixing device comprising an air chamber, a casing communicating therewith, a seconl casing communicating with and spaced from the fi st casing, and provided with a series of openings, a gasifying chamber around the adjacent ends of said pair of casings and the space between the same and the series of openings in the second casing, heating means for said gasifying chamber, a fuel jet, a suitably journaled sleeve fitting around and communicating with the fuel jet, a fan or agitator rigid with tie sleeve and substantially closing the space between the two casings, one or more fuel pipes secured to the sleeve and to said fan or agitator for receiving fuel supplied by the jet and conductin it through the space between said casings into the gasifying chamber, and means for supplying lubricant to the journaled portion of the sleeve.

6. In a as mixing device, an air chamber, an adjustable cho-lre for controlling the entrance of air into said chamber, a cylindrical casing communicating at one end with the air chamber, a second cylindrical casing,

alined with but spaced from the other end of the first-named casing and provided with a series of openings, a slrirt for the perforated end of the second casing and enclosing the adjacent end of the first-named casing, the space within the skirt communicating with the space between the casings, a heating cham ber adapted to be heated by exhaust gases of an engine surrounding the said shirt to heat the same, a valve-controlled fuel jet disposed axially of the casings and located in the air chamber, a sleeve ext nding axially of the casings and provided with a chamber enclosing the discharge end of the fuel jet tube, a fan or agitator rigid with said sleeve and having a band practically closing the space between said casing, one or more tubes extending from the fuel-receiving chamber of the sleeve through said band to discharge into the gasifying chamber and against the outer wall thereof, and a rigid oiling tube within the second cylindrical casing and said sleeve and forming a bearing for the latter and provided with an orifice for supplying oil to lubricate such bearing.

7. In a gas mixing crevice, a choke-controlled air-receiving casing, a valve-con trolled fuel jet tube within said casing, a gasoline container in communication with the fuel jet tube, a vertical casing upon and communicating with the air casing, a Venturi tube in said casing, a second casing vertically above and spaced from the first casing and provided near its lower end with a series of openings and with a skirt portion enclosing the up er end of the first-named casing, and providing a gasifying chamber in communication with the space between the casings and the openings of the second casing, an exhaustgas container encircling the shirt portion and forming a part of the outer wall of the gasifying chamber, a throttle in the said second casing, a cross bar in the latter between the throttle and the said series of openings, an oiling tube secured in and depending from the cross bar and provided at its lower end with an oil-discharge opening, an oil supply tube communicating with said oiling tube, a sleeve journaled in the oiling tube and provided at its lower end with a chamber for receiving gas from the gas-jet tube, a circular fan rigid with the sleeve and comprising inclined blades and an enclosing band for practically closing the space between the two casings, one or more fuel tubes secured to the lower end of the sleeve and communicating with the second casing, a tube connecting said gas tube with the gasoline chamber, and means for supplying air for mixture with the fuel supplied through said last-named tube to the said casing.

8. A gas mixer having alincd casings spaced apart, one constituting an air chamher and the other a mixing chamber and provided with openings in proximity to the air chamber, the carburetor also having a vaporizing cham er surrounding the adjacent ends of said casings and the space between them and communicating with the mixing chamber through said openings, a heating chamber around the vaporizing chamber, means in the air chamber to be revolved by air passing therethrough to the mixing chamber, and one or more liquid fuel-supply tubes to be revolved by said means to discharge liquid fuel by centrifugal force directly into the vaporizing chamber.

9. A gas mixer having alined casings spaced apart, one constituting an air cham her and the other a mixing chamber and provided with penings in proximity to the air chamber, the carburetor also having a vaporizing chamber surroimding the adjacent ends of said casings and the space between them and communicating with the mixing chamber through said openin s, a heating chamber around the vaporizing chamber, means in the air chamber to be revolved by air passing therethrough to the mixing chamber, a ring rotatable with said means and substantially closingthe space between the casings, and one or more liquid fuel-supply tubes rigid with said ring and projecting into the vaporizingchamber to discharge liquid fuel there- 10. A gas mixer having alined casings spaced apart, one constituting an air chamber and the other a mixing chamber and provided'with openings in proximity to'the air chamber, the carburetor also having a vaporizing chamber surrounding the adjacent ends of said casings and the space between them and communicating with the mixing chamber through said openings, a heating chamber around the vaporizing chamber, a fan in the air chamber to be rotated bythe passage of air from the latter to the mixing chamber, and one or more tubes rotatable with the fan and adapted to discharge liquid fuel into the vaporizing chamber.

11. A gas mixer having alined casings spaced apart, one constituting an air chamber and the other a mixing chamber and provided with openings in proximity to the air chamber, the carburetor also having a vaporizing chamber surrounding the adjacent ends of said casings and the space between them and communicating with the mixing chamber through said openings, a heating chamber around the vaporizing chamber, a liquid fuel jet tube disposed axially of the said casings, a suitably journaled sleeve fitting over the discharge end of the said jet tube and disposed axially of the casings, a rotary fan rigid with said sleeve, aring rigid with the fan and closing the space between the adjacent ends of the casings, and a liquid fuel supply tube rigid with the said sleeve and the vaporizing chamber.

In testimony whereof we afiix our signatures.

STRAUD K. WOOD. JESSE C. KING;

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