US1515384A - Carburetor - Google Patents

Description

Nov, il, 1924.

A` J. FRAME CARBURETOR Filed Jan. 5, 192:2- lf-W je 3 Sheets-Sheet l NW, ll, 1924.

A. J. FRAME CARBURETOR Filed Jan. s, 1922 3 shew-sheet 2 M ell-rouw Nov, 11, 1924.

A. J. FRAME CARBURETOR 3 Sheets-Shea t 3 @Hmmm/4 Patented Nov. lll, i924.

ARCHE JAMES FRAME, 0F MIAMI, FLORIDA, ASSIGNOR 0F ONE-F T0 FRANKL FELIX, 0F HARTFORD, TUCKY.

CARBURETOR.

Application led January 3, 1922. Serial No. 526,741.

To all whom t may concern:

Be it known that I, ARoEm JAMES FRAME, a citizen of the United States, residing at Miami, in the county of Dade and State of Florida, have invented certain new and useful Improvements in Carburetors, of which the following is a speciiication.

My invention consists in a new and useful improvement in carburetors for internal combustion engines and is designed to provide a carburetor capable of supplying two kinds of liquid fuel. It is so constructed that the fuel demand of the engine at low speeds is supplied by gasoline while at high speeds the engine is supplied with a heavier fuel oil.

The improved features of my device are clearly illustrated in the carburetor disclosed in the drawings which show one specific embodiment of my invention, but it `must be understood that .l do not consider my invention limited to the details of construction illustrated in the specific embodiment shown and hereinafter fully described, but refer for its scope to the claims appended hereto.

In the drawings: y

Fig. 1 is a side elevation partly in section of a carburetor embodying my invention.

Fig. 2 is an end elevation partly in section, on the line 2 2 of Fig. 1.

Fig. 3 is a top plan view.

' Fig. 4 is a horizontal section through Fig. l, on the lline 4 4. l

The carburetor disclosed in the drawings has the usual tubular mixing chamber M, the upper end M1 of which is adapted to be attached to the intake manifold of the engine in the ordinary manner. The chamber M is provided with the usual air intakev passage M2. Extending outwardly from the wall of the chamber M there are two wings M8 and M4 to which is bolted the duplicate float chamber C by means ofthe bolts Ms which are screwed into the bosses C1 and C2 of the chamber C. This vchamber C is provided with two compartments G and O designed to contain gasoline and -a heavier fuel oil'respectively. Each of these compartments G and O is provided with the usual form of fuel supply conduit and a. float-controlled valve for same. A removable top C3 is provided to close both compartments G and O. Supply conduits C and C5 lead from the compartments G and O respectively, and communicate with the common conduit CG; Communication between the two conduits C2 and C5 and the conduit C6 is controlled by a two-way plug valve C7 the operation of which will beY presently explained.

The lower end of the mixing chamber M is provided with a centrally disposed bore M6 into which is snugly fitted a fuel nozzle core D held therein by a screw-cap M7 and packing M8. This core D has/a fuel conduit D1 which when the core D is positioned registers with the conduit M9 through the wall of the chamber M, which communicates with the conduit C". Surrounding the upper end of the conduit D1 is the nozzle D2 within ywhich is the needle-valve D3 which is adjustably mounted in the core D and provided with the operating handle D4 which passes through the packing M8 and the cap M7 and is readily accessible at the bottom of the carburetor.

Upon the upper end of the core AD there are mountedvthree guides D5 in which is 80 carried the reciprocable lfuel sprayer D6. The core D is spaced from the nozzle D2 and the lower part of this sprayer D6 lits'loosely about the nozzle D2. rlhe sprayer D6 is provided with a fuel conduit D7 located direct- 85 ly above the nozzle D2 and having a construction Ds therein. This conduit D7 flares abruptly above the constriction DEl and has in its top a wire-mesh screen D9.

Located in the upper part of the mixing of the chamber M there is attached the crank-arm E2. A bracket E3 fixed on the outside of the chamber M above this-'arm E2 carries an adjustable pin E4 which is connected with the arm E2 by a coil spring E5.

Mounted upon the outside of the chamber M below the shaft E1, there is a plate E6 provided with a pintle E7 for the bellcrank lever E8. A link E9 connects the outer end of the arm E2 with one arm ofV this bell-crank lever E8, and a. link E1o connects the other arm with one arm of the bell-crank lever E11 pivotally mounted upon the top of the boss C2 of the fuel chamber C. A link E12 connects the other of this bell-crank lever En with a crank arm E13 whichl is mounted upon the top of the valve-stem CB of the plug `valve C7. 'lhe parts are so proportioned and related that when the vane E is in normal position closing one-half of the passageway through the mixing chamber M, the valve C7 is positioned to afford communication between the conduit C4 of the compartment G containing gasoline, and the conduit C communicating with the fuel conduit D1.

M11 are provided in the mixing chamber M and the air intake passage M2, respectively.

From the foregoing description of the details of construction, the operation of my improved carburetor will be obvious. rlhe carburetor in normal adjustment is adapted to utilize gasoline as fuel. When the speed of the engine increases, the suction through the mixing chamber M causes the vane E to move against the restraint of the spring E5, thus assuming a vertical position and increasing the opening in the upper or fuel discharge end of the carburetor. 'lhis movement of the vane E operates the valve C7 by means of the connections above described, so that the gasoline fuel supply is cut o' and the heavy oil fuel is admitted. When the engine speed is reduced, the consequent reduction of suction through' the mixing chamber M permits the spring E5 to restore the vane ld to its normal position and thus cut o' the heavy fuel oil supply and reestablish the gasoline supply. llt will be seen therefore that ll have provided means for determining the character of fuel supply, which is automatically responsive to the status of the operation of the engine.

Not only" does the status of the engines action determine the character of the fuel but it ualso determines the adjustment of the fuel supply means. 'llhis adjustment is made by the movement of the reciprocable which regulates the fuel supply. When thel speed of the engine increases the suction, the sprayer D6 is caused to rise from the nozzle D2, thus causing the conduit D7 to form av well between the nozzle D2 and the constriction D8. "llhe extent of the movement of the sprayer D6 and the consequent depth I of this well, which is determined by the rTlhe usual throttling elements M10 and degree of suction, determines the amount of fuel supplied.

Having described my invention, what ll claim is:

l. A carburetor for an internal combustion engine provided with two oat chambers, a valve controlling the outlets of said chambers, and a vane adapted to be actuated by the suction of the engine and provided with means adapted to operate said valve.

2. ln a carburetor for an internal combustion engine, the combination of a plurality of fuel chambers; an outlet conduit leading from each of said chambers; a valve adapted to open and close each of said conduits; a mixing chamber; a vane pivotally mounted in said chamber; and a series of cranks and links adapted to be operated by the movement of said vane to operate said valve.

3. A carburetor for an internal combustion engine provided with a plurality of fuel supply means, means responsive to the engine suction adapted to selectively determine the operation of said supply means, said carburetor being also provided with air supply means, and means actuated by the air supply adapted to control each of the fuel supply means to proportion the fuel supply in proper relation to the air supply.

ln testimony whereof l it my signature.

anciana .matins ramas.

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