US2072147A - Carburetor - Google Patents

Description

March 2, 1937. M. WINTER ET AL CARBURETOR Filed Aug. 14, 1934 n fer l/lfo Di r7070 INVENJ'OR Wm /w% M v ATTORNEY Mart Patented Mar. 2, 1937 PATENT OFFICE CARBURETOR .Martin Winter,.New York, and Vito DAmato, Corona, N. Y.; said DAmato assignor to said Winter Application August 14, 1934, Serial No. 739,722

7 Claims.

This invention is an improvement in the carburetor shown in our prior application with the Serial Number 732,752, and was filed in the Patent Oflice June 28, 1934, in that afuel injection 5 pump is incorporated in the carburetor, the location of the auxiliary fuel connection is changed to increase the efficiency and the general design of the respective casings is changed to reduce the manufacturing cost.

: J The purpose of thisinvention is to improve the carburetor of our prior application by increasing the pick-up speed with a fuel injecting pump, which supplies an additional amount of fuel for an instant when this fuel is required.

5 Fuel pumps of this type have been used on different types of carburetors, however, the spe cial design of the pump, as shown and described herein is desired for this carburetor as it is desired to arrange the pump so that it will not supply additional fuel when the plunger is moved down slowly and, therefore, will only supply the additional fuel when it is moved down with a comparatively quick movement.

The object is, therefore, to increase acceleration by supplying additional fuel in which the supplying means is operated by the foot throttle, and also in which said supplyingj means only operates when the foot throttle is moved with a comparatively quick movement.

3) Another object is to improve the design of the carburetor in order to reduce the cost there- A further object is to provide a carburetor of this type having an accelerator pump which does not interfere with the normal operation thereof.

And a still further object is to provide an improvement in carburetors of this type in which an accelerator pump may be used which is of a simple and economical construction.

With these ends in view the invention embodies .a carburetor having a substantially rectangular shaped central casing provided with the usual carburetor flange at the upper end and open at the lower end, and auxiliary rectangular shaped tanks projecting into the sides of said casing and provided with inlet and outlet connections, in which one of said tanks is adapted to supply fuel and the other water, and also a fuel injection pump positioned on the tank used for fuel and 5" taken in connection with the drawing, wherein;

Figure 1 is a plan view of the carburetor with partsbroken away.

Figure 2 is a side elevation ofthe carburetor with parts broken away showing the interior construction thereof. 5

Figure 3 is a detail showing a fuel injection pump of an alternate design.

In the drawing the carburetor is shown as it may be made wherein numeral 1 indicates the central tubular chamber, numeral 2 the fuel tank, and numeral 3 the water tank.

In the design shown the chamber-l is formed with square tubing, however, it will be understood that this may be made ofany material and of any shape or design. This chamberis provided with a flange 4 at the top, similar .to a carburetor flange, and adapted to be .bolted' to the intake manifold of an internal combustion engine and at the lower end is a hood 5 forming an air horn,- and a connection for an air filter, 5120 or the like. This memberis shown attachedto the lower end of the'chamber l by rivetsfi, however, it will be understood that it may beattached in any manner. In the central part of the chamber 1 is a restricted area formed by baffie plates 1 extending inward, as indicated by the shading, however,- it will be understoodthat any means may be used for restricting the area of this chamber in order to accelerate the passage of air therethru.

.In the upper part of the chamber I is a butterfly valve 8 adapted to be connected by an arm 9 to the accelerator and'in the lower part of the chamber is a second butterfly valve II], also adapted to be connected thru an arm I I to a point from which it may be operated, and it will be noted' that these valves may be operated independently, so that either may be used to obtain substantially any flow of air thru the chamber. It will also be understood that valves of any other type may be used, and these may be operated in any man- In this design, the valves are formed of flat plates and mounted in shafts l2 and I3, which are journalled in the sides of the casing ofthe chamber I. The fuel tank 2 is also formed of square tubing, and this is provided with a base l4 and a head l5, both of which may be held in. the tube in any manner. This tank is provided with an inlet connection l6, which may extend 'to the vacuum tank, or to any means for supply- 350 tank 2, and an outlet passage 2| communicating with a tube 22 extending upward therefrom and also extending thru the wall of the tank 2, as shown at the point 23. The end of this tube forms a nozzle, and air passing upward thru the restricted area of the chamber draws fuel from the interior of the tank 2, thru the valve I1, and thru the tube 22, so that it will be injected in the form of a. spray into the restricted area of the member I. The valve I1 is also provided with an inlet passage 24, which communicates with the lower end of a chamber 25, which forms a pump, and the chamber 25 is provided with a piston 26 with a connecting rod 21 extending upward thru the head 28 thereof and pivotally connected to a connecting link 29, as shown at the point 30. The upper end of the link 29 is pivotally connected to an arm 3| at the point 32, and it will be noted that the arm 3|, which extends outward from the hub of the member 9, is provided with a plurality of openings so that the link 29 may be connected at a plurality of points in order to increase or decrease the stroke of the piston 26. It will be understood, however, that the arm 3| may be replaced by an arm 33, which may extend directly outward from the hub of the member 9, and this may be provided with a slotted opening to which the upper end of a connecting rod 34, may be attached, as shown in Figure 3. It will be understood that either connection-rnay be used with either type of pump, and also that any other means may be used for connecting the plunger of the pump to the operating means or butterfly valve, so that as the valve isv opened the plunger will move downward.

In the design shown in Figure 3, the pump is similar to that shown in Figure 2, except that it is formed with a tubular cylinder 35 having a head 36, and the connecting rod 34 extends downward into the tube, forming the plunger. In either design the lower end of the pump cylinder commmunicates with the passage 24 thru which it is connnected in the valve I1, and thru the valve to the tube 22, and just above the opening 24 and communicating withthe lower end of the tank,22, is an opening 31, which is substantially smaller than the opening 24, and it will be noted that as the plunger moves downward with a slow movement, any substance in the cylinder will pass thru the opening 31, whereas if the plunger moves downward with a quick movement, the flow of the substance thru the passage 3'! will be restricted, so that substantially all of the substance will be forced thru the opening 34, thereby providing additional fuel to the mixing chamber in order to accelerate the speed of the vehicle. In the design shown the chamber 24 is provided with an inlet opening 38 directly below the piston 26, with the piston at the upper end of the stroke, and above the piston is an opening 39, which permits liquid accumulating on top of the piston to drain backinto the tank. It will be understood that these openings are only typical, as any other arrangement of openings may be provided. In the design shown in Figure 2, thecylinder is of a rectangular shape, whereas in the design shown in Figure 3, it is shown of a cylindrical shape, however, it will be understood that this cylinder may be of any shape and the piston or plunger may be of any type or design.

The tank 2 is also provided with an auxiliary connection 40, which extendsfrom a point 4| at the lower end thereof to a member 42 on the upper part of the chamber I, and this connection communicates with the interior of the cham-- ber thru a passage 43, which is located so that the center line thereof corresponds with the upper edge of the plate 8 forming the upper butterfly valve, with the valve in the closed position, as shown. This is a typical arrangement, and it will be understood that this connection may be provided in any other manner, or'formed by any means.

The water tank 3 is substantially similar to the tank 2, and this is also provided with a base 44 and a head 45, and the head is provided with a connection 46, which extends to a tank or any means for supplying water. Both of the heads l5 and 45 are provided with valves 41 having stems 48 extending downward which are adapted to be engaged by floats 49 in order to'control the flow of liquid in the tanks, and it will be noted that as the floats rise, they will engage the valve stems 48 and close the valves, thereby shutting off the supply of liquid.

The tanks 2 and 3 are inserted in openings in the sides of the chamber and these are positioned so that the inner corners extend into the chamber. It will be understood, however, that these tanks may be formed in the chamber or positioned therein in any other manner, and it will be understood that these tanks may be made integral with the chamber, or may be readily removed and replaced, as shown in our prior application. It will also be understood that the connections thru which water and fuel are injected into the chamber I may extend thru the walls of the tanks, as shown in Figure 2, or may also extend thru the heads of the tanks, as shown in our prior application. The tank 3 may also be provided with a valve 50, similar to the valve I I, and a tube 5|, similar to the tube 22, may extend upward from this valve. Y

It will be understood that other changes may be made in the construction without departing from the spirit of the invention. One of which changes may be in the use of other means for injecting an extra supply of fuel into the chamber or into the intake manifold when acceleration is desired, another may be in the use of other means for operating the pump or accelerating means, and still another may be in the use of this device with a carburetor of any other type.

The construction will readily be understood from the foregoing description. In use the carburetor will function similar to that shown in my prior application, however, when it is desired to accelerate the speed of the vehicle and the foot throttle is forced downward with a quick movement, the plunger will move downward into the pump chamber, thereby forcing an extra supply of fuel upward into the mixing chamber however, during normal operation of the vehicle, the plunger will move downward slowly, and the slow movement will permit fluid in the chamber to pass thru the opening 31, back into the tank. The operation is otherwise similar to that of the carburetor in our former application.

Having thus fully described the invention, what we claim as new and desire to secure by Letters fuel and water, respectively, simultaneously, to said vertical mixing chamber, butterfly valves in said vertical mixing chamber, and means increasing the injection of fuel into said vertical mixing chamber as one of the butterfly valves is opened.

with a comparatively quick movement.

2. A carburetor as described in claim 1 in which the fuel tank is provided with an auxiliary fuel supply connection entering the upper part of said vertical tubular section.

3, A carburetor as described in claim 1 in which the fuel tank is provided with an auxiliary fuel supply connection entering the upper part of said vertical tubular section at a point centered on the lower edge of said butterfly valve with the valve in the closed position.

4. In a carburetor of the type used for internal combustion engines, a vertical tubular chamber, water and fuel chambers positioned at each side of said tubular chamber, inlet connections from said water and fuel connections to said vertical chamber, means controlling the amount of fuel passing thru said mixing chamber on each side of the connections with said water and fuel chambers, an auxiliary connection from said fuel chamber between the air control means and the connection of said mixing chamber to an intake manifold, and means accelerating the injection of fuel into the mixing chamber.

5. The combination with a carburetor of the type having a vertical central chamber open at the lower end, provided with upper and lower butterfly valves operated independently, water and fuel tanks positioned at the sides and extending into the interior thereof, upwardly inclined nozzles adapted to discharge water and fuel simultaneously into said central chamber at a point between said butterfly valves the part of the central chamber into which the nozzles discharge the water and fuel being restricted, means regulating the fuel supply to said nozzles, and a fuel injection pump on said fuel tank adapted to accelerate the injection of fuel into said chamber as one of the butterfly valves is opened.

6. The combination with a carburetor of the type having a vertical central chamber open at the lower end, provided with upper and lower butterfly valves operated independently, water and fuel tanks positioned at the sides and extending into the interior thereof, upwardly inclined nozzles adapted to discharge water and fuel simultaneously into said central chamber at a point between said butterfly valves; means regulating the fuel supply to said nozzles, a fuel injection pump on said fuel tank adapted to accelerate the injection of fuel into said chamber as one of the butterfly valves is opened, said fuel injection pump comprising a piston in a cylinder with openings from the cylinder to the fuel tank.

'7. The combination with a carburetor of the type having a vertical central chamber open at the lower end, provided with upper and lower butterfly valves operated independently, water and fuel tanks positioned at the sides and extending into the interior thereof, upwardly inclined nozzles adapted to discharge water and fuel simultaneously into said central chamber at a point between said butterfly valves; means regulating the fuel supply to said nozzles, a fuel injection pump on said fuel tank adaptel to accelerate the injection of fuel into said chamber as one of the butterfly valves is opened, the lower part of said pump being provided with a small escape opening for the escape of fuel back to the fuel tank when the pump operates with a slow movement.

VITO DAMATO. MARTIN

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