US1483323A - Carburetor - Google Patents

Description

R. M. ANDERSON Bebe 112, 1924.,

CARBURETOR Filed Aug. 14 1920 2 Sheets-Sheet 1 FIGrIlI YINVENTOR.

' W ITNESS:

Feb 112 9 N24;

R. M. ANDERSON CARBURETOR Filed Aug. 14 1920 2 Sheets-Sheet 2 I r INVENTOR. W MW WITNESS:

Km/5M Patented Feb. 1;, 1924.

RAYMOND M. ANDERSON, OF DETROIT, MICHIGAN, ASSIG-NOR TO GEORGE M. HOLLEY,

OF DETROIT, MICHIGAN.

CARBURETOB.

Application filed August 14, 1920. Serial No. 403,585.

To all whom it may concern:

Be it known that I, RAYMOND M. ANDER- soN, citizen of the United States, residing at Detroit, in the county of Wayne and State .of Michigan, have invented certain new and useful Improvements in Carburetors, of which the following is a specification.

The invention relates to improvements-in carburetors having means for supplying fuel to a high speed nozzle and a low speed fuel receiver having a restricted opening through which a jet of fuel issues when the throttle is substantially closed, said low speed receiver being constructed to allow fuel to stand therein above the level of the fuel in the high speed nozzle so as to provide a supply of fuel available to cause an increased flow from thehigh speed nozzle upon a sudden opening of the throttle valve thereby causing the engine to run quite regularly and to prevent stalling thereof. It is therefore, a primary purpose of this invention to provide a carburetor having a reserve supply of fuel which accumulates in the low speed fuel receiver and which stands above the level in the high speed nozzle, so that "-during that period in which the throttle is being rapidly opened, the surplus fuel from said receiver is supplied to the high speed nozzle to assist in maintaining a constant mixture and to permit a rapid acceleration ofthe engine.

In the accompanying drawings, I have shown a preferred embodiment of my invention, but it will be clearly appreciated that such a disclosure is merelymade for the purpose of illustrating one convenient form ofthe invention and that various changes can be made without departing from the spirit of the appended claims. i

In the drawings, Fig. 1 shows a vertical section of. a carburetor in a somewhat diagrammatic form.

' Fig. 2 illustrates a detail showing of one of the parts of the carburetor.

Fig. 3 is a fragmentary sectional view. showing the low speed fuel receiver in operation. Y x

Fig. 4 is a section on line 4.4 of 5 of a commercial type of carburetor embodying this invention.

s Fig. 5 is a similar section of line 5-5 of' Fig. 4.

Referring now more particularly to the drawings wherein like reference character .the conventional indicate corresponding parts, the carburetor comprises the usual casing having an air inlet 1 therein at the atmospheric side of the throttle valve. Controlling said air inlet, there is a choke valve 2 which may be of type and is usually operated upon the starting of the engine. The interior of the carburetor is formed with a venturi 3, which is common in carburetors of this general type and into which venturi the fuel from the constant level reservoir 4 is discharged by means of a high speed jet which will be later described.

At one side of the carburetor, I provide the usual constant level supply chamber, preferably having a float valve 4 therein, and I also provide in this chamber a 'needle valve 5 for regulating the passage of fuel through a restricted opening 6 in the con- 1 stant fuel supply chamber which fuel passes and high speed jet which will be hereinafter described.

The auxiliary supply chamber 8 is formed with a vented closure 9 whereby air may'enter the top of this chamber. In this chamber there is also mounted a tube 11 suspended from the closure series of perforations 12 and a restricted bottom opening 13 from which fuel dis charges. This chamber and tube retains a slight reserve supply of fuel and when the 9 and having therein a engine throttle is suddenly opened after the engine-has been idling the supply of fuel in this chamber 8 discharges through the enlarged opening leading to the fuel passage 7 and from said vpassage on to the high speed jet 17. It will be appreciated that when the engine is'idling as shown in Figure 3, the fuel in the receiver 20 is rising with fuel. I

. upwardly in a stream and should the-throttle The passage 7, leading from the restricted opening regulated by the valve 5, communicates with a low speed fuel receiver 14 having a restricted opening l l at its upper end and also with the high speed nozzle 17 having aninterior air passage communicating with the atomizing air conduit 18' leading from the main air inlet 1. The carburetor is, of course controlled by the usual throttle 16 on the other side of which there is the mixture outlet 19. Entering the carburetor, adjacent the throttle valve when it is closed or partially closed, is the low speed outlet port 15 leading from the mixing chamber 15 disposedin the wall of the carburetor.

From the foregoing description of the various parts, it will be clearly appreciated that when, the engine is idling the throttle valve is in the position shown in Figs. 1 and 3 the combustible mixture is entering the mixing chamber as disclosed by the reference character A in Fig.v 3 above the throttle valve. This is caused by air passing up through the channel 1? from the main air inlet 1 around the restricted opening of the fuel receiver 14 where it comniingles' with the issuing jet of fuel, vaporizing the discharged fuel in the chamber 15, the vaporized mixture then passing on through the port 15. The fuel in the low speed fuel receiver at this time stands substantially above the fuel level in the nozzle 17 and also above the level of the fuel in theconstant fuel reservoir. Therefore, should'the throttle he suddenly opened as frequently occurs,-in the operation of an engine, the suction would be entirely destroyed at the re stricted opening 'of' the low speed fuel receiver and an intense suction would .be created at the high speed nozzle. .The fuel standing in the low speed fuel receiver above the level of the fuel in the "nozzle would then flow out through the high speed nozzle under its static head, and the discharge offuel from this high speed nozzle 17 would be thereby momentarily increased so as to supply the proper quantity of fuel upop the rapid opening of the throttle to permit a satisfactory acceleration and prevent a stalling of the engine' This body of fuel in the low speedreceiver maintained above the level of the fuel in the high speed nozzle therefore most satisfactorily acts to supply that needed additional quantity of fuel that should issue into the mixing 'chamber the.

moment the throttle is opened. The regulated or restr cted openmg controlled by the valve 9 of course prevents this fuelfrom' going back into the constant fuel reservoir and it must discharge through the highl speed nozzle. a

It will be furthermore understood that when running idle or under a light load the throttle 16 is opened but slightly and some fuel outlet 14:. The fuel issuing from the restricted opening 14 is also aspirated with air by-passed around the throttle 16 through the angular air passage 1.

Having thus described my invention, what I claim is:

1. A carburetor comprising a body having a constant level fuel reservoir and a mixing chamber adjacent said reservoir, a mixture outlet and a throttle valve in said mixture outlet, a fuel feeding nozzlefiextending into said mixing chamber, said carburetor being formed with a fuel receiver having its upper end extending to a plane above the fuel level maintained in said nozzle to permit fuel to stand in said receiver so as to be available to cause an increase of flow from the nozzle on opening movement of the throttle, a regulated connection from said constant fuel liquid reservoir to both said nozzle and said fuel receiver, said fuel receiver having a restricted outlet at its upper end for the discharge of a jet of fuel, said carburetor being formed with an opening for the passage of air past said restricted outlet and providing a mixing chamber for the air and fuel adjacent said outlet, the carburetor body being further formed with-a passage 'a constant level fuel reservoir and a mixing chamber, a throttle valve on the engine side of said mixing chamber, of a high speed fuel feeding nozzle discharging into said mixing chamber on the atmospheric side of said throttle, a. fuel receiver in communication with said nozzle and extending to a plane above the level of the fuel in the nozzle to permit fuel to stand in said receiver so as to be avallable to cause an increase of flow from the nozzle on opening movement'of'the with the mixture outlet'passage on the en'-.

gine side of the throttle valve and an air vented auxiliary fuel reservoir in communication with said nozzle to supply an initial fuel charge to the nozzle upon an increased air flow past said nozzle.

. In testimony whereof he afiixes his signature. 1

RAYMOND M. ANDERSON.

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