US1756805A

US1756805A - Rotary vaporizing carburetor

Info

Publication number: US1756805A
Application number: US324721A
Authority: US
Inventors: Walter J Baker
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-12-08
Filing date: 1928-12-08
Publication date: 1930-04-29
Anticipated expiration: 1947-04-29

Description

April 29, 1930; w. J. BAKER ROTARY YAfORIZING CARBURETOR Filed Dec. 8, l92 2 Sheets-Sheet 1 INVENTOR 772L564 M By 2721?. MMW

ATTORNEY April 29, 1930. w, BAKER 1,756,805

ROTARY VAPORIZING CARBURETOR Filed Dec. 8, 1928 2 Sheets-Sheet 2 INVENTOR maawim A TTORNE Y i so Patented Apr. 29, 1930 UNITED STATES PATENT OFFICE W.ALTER J. BAKER, OF CHILLICOTHE, MISSOURI ROTARY VAPORIZING CARB'URETOR Application filed December a, 1928. Serial No. 324,721.

My invention relates to rotary vaporizing carburetors, and the objects of the invention arecentrifugal type having facility to more completely vaporize liquid fuel and mix air therewith to form an explosive mixture for intervaporizing chamber and thereby provide a vaporized gaseous dry mixture to start the engine and obviate the use of the choke only for the purpose, which practice allows the introduction of liquid fuel to the intake manifold and consequent dilution of the crank case contents. v

Fourth. To provide manually operable means to change the relative richness of the fuel mixture to meet variable operating conditions. I

Fifth. A further object of the invention is to provide a rotary carburetor having the throttle valve located at the inlet instead of the outlet end of the carburetor to obtain the advantage of the lower atmosphere pressure behind the throttle and Venturi-tube.

I attain these objects and other advantages that will hereinafter appear by means of the apparatus illustrated in the accompanying drawing in which r Figure 1 is aside elevation of a carburetor embodying my invention and showing the same connected in operative position. Figure 2 is a transverse section of the carburetor, on the line 22 in Figure 1.

Figure 3 is avertical section through the carburetor. v

Figure 4 is an end view of the casing member and,

Figure 5 is a plan view of the head portion of thecarburetor.

First. To provide a carburetor of the rotary Similar numerals of reference refer to corresponding parts throughout the several views.

Referring to the drawings, the numeral 1 designates a carburetor constructed in accordance with my invention. 3 is fairly representative of the conventional float-feed container for liquid fuel having a feed pipe 4 connected thereto. The carburetor comprises a cup-shaped separating and vaporizing chamber 5 having circumferentially of its wall a series of longitudinally extending slots 6 and which extend inwardly to adjacent the bowl 7 of the vaporizer. The side walls of said slots are formed upon different angles, as shown at 8 and 9 in Figure 2, and the inner end walls of the slots are outwardly beveled,

as shown at 10 in Figure 3. The bowl portion of the vaporizer has an annular flange 11 on its outer circumference and an axial bore in which apipe 12, having an annular flange 13 adapted to bear on the inner'side of the bowlto hold the pipe in place with the cooperation of a nut 14 which is screwed on the threaded portion of the pipe. An elbow 15 is screwed on the outer end of the pipe and has a flange 16 adapted for connection to the intakemani fold, not shown, in the well understood manner. Thepipe is extended into the vaporizer chamber to adjacent the inner ends of the slots 6. An annular casing member 17 is arranged to surround the vaporizer chamber and has a diameter adapted to be spaced from the vaporizer a suitable distance to provide of the space an annular chamber 18. The inner end of the casing member bears on the. flange 11 and is held in place by a disk 19 which clamps the casing member to the flange 11; Screws 20 are extended through holes .21 in the disk and screwed into the peripheral edge ofthevaporizer, as shown in;Figure 3. A. Venturi-tube duct 22 is secured in an opening 23 in the lower portion of the casing member and is formed with a converging throat. A butterfly-valve 24 is pivotally mounted in the duct 22 and in such a manner that the pivot 25 carrying the valve shall be stationed above the middle of the valve to thereby invest the valve with an upper short angularly disposed portion 26 and a long vertical lower portion.

' carry particles of the fuel passing from pipe 4.

27 so that when the valve is rotated to the open position air and fuel will first enter at the bottom of the duct and followed by the admission of additional air at the opening of the upper portion of the valve. The rod 25 is extended outwardly of the Venturi-duct a lit-tle distance and a link 28 is secured thereon and connected to a throttle rod, not shown. The feed pipe 4 is extended through the side of the duct 22 and a little distance into the same and there terminating in aninwardly bent portion 29. A mixture distributing pipe 30 is extended through the floor of the duct in diagonal direction to adjacent the end of the pipe 4 and is spacedtherefrom a suitable distance to permit the air drawn through the duct to the vaporizing chamber to contact and to pipe 30. The pipe 30 is downwardly'inclined and extends to the lower side of the casing 17 where it is bent upwardly and the bent portion extended through the casing into the chamber 18 where it terminates in a nozzle 31 adapted to Vent fuel directly into the chamber 18 at a point in line with one of the slots 6. A branch pipe 32 is connected at its one end to pipe 30 and is extended around the inner side of the casing in chamber 18 to a point at the upper side of the vaporizer where its terminal portion is bent at right angles and. the bent portion extended into one of the slots 6, the bent portion terminating in a nozzle 33 adapted to vent fuel into the vaporizer through said slot.

The carburetor constructed in accordance with my invention is connected to the intake manifold of the motor. not shown, in the well understood manner. The fuel feed pipe is connected to the float-feed container and to the Yenturi-tube of the carburetor and the link 28 is connected to the throttle rod, not shown. As the motor starts the down strokes of the pistons the air and fuel mixture is drawn through the Venturi-tube, if the throttle valve is partly opened. The fuel flows through the pipe 4 from the float-feed container and is delivered at the end 29 ofthe pipe to pipe 30. The space between the ends of the

pipes

4 and 30 is for the purpose of allowing the air moving at high velocity induced by the motor suction to mix with the fuel passing from pipe 4 to pipe 30, the mixture passing into the chamber 18, in the direction of the arrows marked on Figure 2, and passing from the chamber 18 through the tangential slots 6 into the separator and vaporizing chamber and assuming therein a rotary motion, as indicated by the arrows on Figure 2. The mixture of air and fuel being drawn into the vaporizing chamber at an angle and at high velocity a gyrating column of cyclonic speed is induced which is capable of disintegrating and vaporizing particles of the liquid fuel in the mixture. The gasoline content of the mixture on entering the separator and vaporizer is in a more or less finely divided state, as mist or drops, and floating in the g rating column are vaporized, whereupon, t e dry gaseous fuel converges to the axis of rotation and by virtue of its low specific gravity is drawn into the pipe 12 and passes into the intake manifold connected therewith. The particles of the liquid fuel are not drawn into the pipe 12 because the high velocity at which the gyratin column rotates induces centrifugal force to old the particles at the outer edge of the column where they are carried about a circular path and are acted upon by the high velocity streams of air moving at an oblique angle to their travel and thereby efi'ecting disintegration and vaporizing the fuel to a gaseous state. The separator and vaporizer functions to hold the fuel particles apart from the dry gas and to vaporize the same by the influx of air at an oblique angle. The auxiliary pipe 32 discharges fuel from the nozzle 33 at an oblique angle into slot 6 at the upper side of the vaporizer, likewise nozzle 31 vents fuel into the chamber 18. A great advantage of the carburetor is that nothing but a dry combustible or explosive mixture can pass into the intake manifold and thereby preventing dilution of the crank case oil and obviatin the use of the choke for starting the motor.

aving described my invention what I claim is- 1. In a rotary vaporizer, the combination with the intake manifold of an internal combustion engine, of a central circular hollow body having circumferentially a series of elongated inlet ports extending obliquely through its wall and provided axially with an outlet pipe communicating with the hollow body and adapted to communicate with the intake manifold of the engine, an annular duct or chamber surrounding said hollow body and communicating with the inlet ports there-' in, a Venturi-tube communicating with said annular duct or chamber and with atmosphere, a main fuel feed pipe communicating with said Venturi-tube and with a source of liquid fuel, and auxiliary fuel feed pipe registering with the end .of said main fuel feed pipe and provided within the annular duct or chamber with nozzle portions adapted to vent liquid fuel therein, and a rotatably mounted valve in said Venturi-tube inwardly of said feed pipes to regulate the admission of a mix-' ture of air and fuel to'said annular duct or chamber to be drawn therefrom by suction into the hollow body in oblique streams of high velocity to produce in the hollow body a rotary gyrating column of explosive mixture capable of vaporizing liquid particles of fuel and collect the dry vapor at the axis of rotation of the rotating column of air and fuel.

2. The combination, in a rotary vaporizing carburetor, of a central cup-shaped body having an outlet portion adapted to communicate with the engine intake manifold and provided circumferentially with an annular series of elongated inlet ports extendin obliquely through its walls, the op osite wa ls of said ports being formed inwar 1y converging and the end walls of the ports being outwardly beveled, a casing secured on said body and spaced apart therefrom to form of the space an annular chamber, said chamber being provided with an inlet portion extending at right angles to the casin to allow fuel mixture to flow into the chain er, and an auxiliary fuel feed mixture pipe extending into the chamber and having in the chamber a plurality of nozzles adapted to vent fuel mixture through the inlet orts in said body.

. EVALTER J. BAKER.