US1437281A

US1437281A - Fuel-feeding means for internal-combustion engines

Info

Publication number: US1437281A
Authority: US
Publication date: 1922-11-28
Anticipated expiration: 1939-11-28

Description

I. TWOMBLY. FUEL FEEDING MEANS FOR INTERNAL COMBUSTION ENGINES.

APPLICA'I'ION FILED MAN. 4, I919. RENEWED JUNE 1,437,281.

Patented Nov. 28, 1922.

III/VENTOR Patented Nov. 28, 1922.

UNITED STATES 1,437,281 PATENT OFFICE.

. WILLARD IRVING TWOMBLY, OF NEWARK, JERSEY, ASSIGNOR TO ACME ACCESSORIES CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

FUEL-FEEDING MEANS FOR INTERNAL-COMBUSTION ENGINES. Application filed March 4, 1919, Serial No. 280,674. Renewed June 5, 1922. Serial No. 565,894.

reservoir the fue is delivered from the usual supply tank located at a point either above or below the engine, and it is the primary object of the invention to provide improved means for this purpose which are simple and cheap in constructlon comprising a few number of parts and one in which the constant and eflicient operation thereof is assured.

It is a further object of the invention to provide fuel feeding system of this character in which a pump is utilized to draw the fuel from the supply tank and deliver it to an auxiliary reservoir, improvedmeans to con' trol the delivery of fuel to the reservoir and to maintain the fuel below a predetermined level in the reservoir.

Another object of the invention is to pro vide a fuel feeding system in which the pumping mechanism is connected to the engine cylinder and operable by the engine motive actuating fluid in the engine cylinder, and so arranging the pumping mechanism and reservoir whereby the heat ofthe motive :lt'orce for the pump from the engine is utilized to heat the fuel in the reservoir prior to its delivery to the carburetor of the engine and thereby facilitate the vaporizing of they fuel.

It is another object of the inventionto provide improved valve mechanism for the out let of the pump mechanism, and means to control the same to regulate the fuel. level in the reservoir.

Other objects and advantages will. hereinafter appear.

In the drawing accompanying and forming a part of this specification, Figure 1 is a side elevation of a motor vehicle showing in a diagrammatic manner the application of my invention thereto utilized to lift liquid fuel or gasolene from a supply tank located at a point below the fuel intake of the engine and deliver it to the auxiliary reservoir from which it is fed to the carburetor of the engine. a

Figure 2 is a sectional side elevation of my improved pumping mechanism combined with a reservoir for use in connection with my improved fuel feeding means and sy stem, and showing my improved valve mechanism for the outlet of the pump into the reservoir, and the means to control the same ang thereby the fuel level in the reservoir, an

Figure 3 is a plan view of the valve for the pump outlet.

Similar characters of reference designate like parts throughout the difierent views of the drawing.

In Figure 1 of the drawing I have shown an embodiment of my invention applied as a fuel or gasolene feeding means for a motor vehicle, the motive power of which is an internal combustion engine 6 to which is connected a carburetor 7 by a manifold intake 8, and a liquid fuel supply tank 9 located at the rear ofthe vehicle at a point below the carburetor and fuel intake of the engine. The supply tank 9 is connected by a pipe 10 to suction creating means comprising a pumping mechanism combined with an auxiliary fuel reservoir (shown in a general way at 11), the pumping mechanism being connected by a pipe 12 to the combustion chamber of the engine cylinder, as through the opening for the priming cup for the engine, as shown at 13, to be operable by the engine motive actuating fluid in the engine cylinder.- The auxiliary reservoir of the pumping mechanism is connected by a pipe 14 with the reservoir of the carburetor 7 The suction creating means or pumping mechanism operable by the engine motive actuating fluid, such as by the compression and expansion pressure of the engine motive actuating fluid, or during the compression and power strokes of the engine piston, to draw anddeliver the fuel from the supply tank to the reservoir, comprises a cylinder 16 mounted in or integral with a re ervoir 1'7 constituting the auxiliary supply reservoir so that the cylinder may be submerged in the liquid in the reservoir for a purpose to be hereinafter described. A piston 18 to slidably reci rocatein the cylinder 16 separates the cylin er into a pump chamber 19 at one end of the piston and a motrve chamber 20 at the opposite end of the p ston. The motive chamber 20 has a port'2lthrough a nipple connected to thecyhnder thepump chamber, a second spring 28in the pump chamber yieldingl resisting the movementof the piston into t e pump cham bcr by the pressure of the motive fluid after the piston has moved a predetermined distance into the pump chamber.- The springs,

27, 28 are arranged-one within the other and are preferably 0 positely spiraled. The pump chamber 19' as'a suction inlet 29, from the supply tank 9 through the pipe 1O controlled by a check valve, shown in i so chamber to the reservoir, said valve com-j the form of aball valve 30 opening into and closing outward from the pump chamher, and an outlet 31 into the reservoir 17 through a projection or stand pipe 32 'eX- tending up into the reservoir. The outlet 31 is restricted relative to the

inlet

10, 29. The pump outlet 31 is controlled by a. check valve 33 closing the opening from the pump prising a disk seating against the annular flanged end 34 of thej'st'a nd pipe 32 and normally urged to its seat by a spring 35.

ln-operatlon as the engine 6' is'operated the engine motive actuatin fluid during the compression and expansion thereof, as during the fuel compression and power strokes of the engine piston, will pass" through the connection 12, 2t oi the engine with the motivechaml'ier 20 and operate to force the piston 18 into the pump chamber 19 of the cylinder 16 a ainst the action'of the springs 27 28 firmly seating the valve 30 to the inlet of the pump chamberand forcibly ejecting any liquidfuel in the pump chamber through the outlet 31 in the stand pipe 32 into the reservoir 17 the pressure of the ejected fluid lifting or u nseating the valve 33 and ejecting the fuel substantially as shown in-Figure" 2. the pressure of the engine motlve actuatlng fluid is relieved on'the piston 18, as during the suction and exhaust strokes -oi? the engine piston, the piston 18 will be moved into the motive chamber of the cylinder 16 by the spring 28, 27. As the valve 33 will be immediately seated by its spring 35' as soon-'asthepiston 18begins its return movement such return movement of the piston imparted thereto by the springs 28, 27 will create a vacuum in the pump chamber 19 which will operate to unseat the valve 30 for the inlet to the pump chamber and draw fuel from the'supply tank into the pump chamber, this operation being repeated duringthe alternate movements of the piston 18. To prevent the piston 18 striking against the end wall of the motive chamber 20 with the consequent clicking and, knocking noises there is interposed between the end of the piston and motive chamber a spring 37 to act as a yielding bumper for the, piston. The fuel is delivered from the reservoir 17 to the reservoir of the carlmre'toi" by gravity through the pipe 14 i The piston 18 reciprocates rapidly in accordance with the rapidity of the reciprocations of the engine piston, andvby restricting the outlet of the pump chamber in relation to the inlet thereof the'discharge I of the fuel from the pump to the reservoir is retarded creating pressure in the pump chamber which operates to quickly close and positively maintain the inlet valve tothe pump chamber closed during the ejecting movement of the piston 18. i y

The engine motive actuatingfluid during the compression of the sairie'in the engine cylinder, as well as during the expansion or combustion of such fluid or fuel, is heated, and as it is during the compression and expansion of this actuating fluid in the engine cylinder that it is utilized to actuate the pumping mechanism it. also tends to heat the cylinder 16, and to cool and prevent the overheating of this cylinder it is mounted inthe reservoir 17 to be immersed in the fuel therein. The heat radiated by the cylinder 16 also heats the fuel in the reservoir 17 and as it is delivered to the reservoir in such heated condition the fuel is: readily vaporized increasing the efliciency thereoit.

- To prevent flooding of the reservoir 17 means are provided. to shut ofl' the supply oi fuel; to the reservoir when the fuel level in the reservoir rises to a predetermined level and below thefoutlet of the pump chamber in the stand pipe. For this pur-.

pose there is provided in the reservoir a float 40 carried at one end of a stem 41 which is 'fixed at the opposite endto a rod 42pivotally supportedin opposite walls of the reservoir. The end of the float carrying stem where it is connected to its support 42 is tormed into a downwardly extending loop as shown at 43, to engage in a transverse slot 44 in a boss extending up from the valve 33 with a pin 45 extending transversely of the boss slot 44 and through the opening inthe loop 43. The spring 35 is confined between the float sup iiort 42 and the valve'bo'ss and normally urges the valve l l U 33 to the end of the pipe, and the valve is adapted to be opened by being moved against the action of such spring as the fuel is discharged from the pump chamber by the-piston 18. The valve 33 also has sliding movement on its seat laterally of the stand pipe to connect the outlet of the pump chamber with the reservoir to prevent creation of suction in the pump chamber. With the float in the full line position shown in Figure 2 the valve disk is maintained in the position shown in full lines. However, as the fuel level rises in the reservoir substantially to the position shown with the float moved to the dotted line position such rising of the float will impart lateral movement to the valve 33 to substantially the position shown in dotted lines causing a recessed portion 47 in the valve to uncover the outlet 31 in the stand pipe, the valve being main tained in this position until the level of the liquid is again lowered by the discharge of the fuel from the reservoir 17 to the carburetor. While the valve is open the reciprocation of the piston 18 Will draw air from and again discharge it into the reservoir, such air impairing the suction or preventing the creating of a vacuum in the pump chamber with the result that the inlet valve 30 for the inlet of the pump chamber through the supply pipe will not be opened.

Having thus described my invention, I claini:

1. In fuel feeding means for internal combustion engines, the combination with a carburetor connected to the fuel intake of the engine and a liquid fuel tank, of a reservoir having a projection extending thereinto and an outlet connected to the carburetor; suction creating means having a suction inlet from the tank and a valved outlet through said projection tocontrol the delivery of the fuel from the tank to the reservoir; and means to maintain the fuel level .in the reservoir below the outlet in the projection extending into the reservoir.

2. In. fuel feeding means for internal co1nbustion engines, the combination with. a carburetor connected to the fuel intake of the engineiand a liquid fuel tank, of a reservoir having an outlet connected to the carburetor;suction creating meanshaving a suction inlet from the tank and an outlet into the reservoir; and means to open the outlet from the suction means to the reservoir when the fuel reaches a predetermined level in the latter, below that of said outlet.

8. In fuel feeding means for internal combustion engines, the combination with a liquid fueltank, of a reservoir having an outlet; a pump chamber having a suction inlet from the tank and a restricted valved outlet in a portion projecting up into the from the tank to the reservoir; and means to maintain the fuel level in the reservoir below the outlet in the portion projecting into the reservoir for the purpose specified. 4;. In liquid fuel feeding means for internalcombustion engines, the combination with a liquid fuel tank and a carburetor of a reservoir from which the fuel is fed to the reservoir of the carburetor; a pump having a suction inlet from the tank and a valved outlet into the reservoir; and means operable by the rising fuel level in the reservoir to maintain the fuel level below the outlet of the pump into the reservoir for the purpose specified;

5. In fuel feeding means for internal combustion engines, the combination with a liquid fuel tankand a carburetor of a reservoir from which the fuel is fed to the carburetor; a pump having a suction inlet from the tank and a valved outlet into the reservoir; and means operable when the fuel reaches a predetermined level in the reservoir to shut off the delivery of fuel by the pump and maintain the fuel level below the outlet of the pump in the reservoir for the purpose specified.

6. In fuel feeding means for internal combustion engines, the combination with a liquid fuel tank and a carburetor of a reservoir from which the fuel is fed to the carburetor said reservoir having a stand pipe; a pump having a suction inlet from the tank and an outlet in said stand pipe; a valve normally. yieldingly urged to position to close the outlet of the pump in the stand pipe; and means to operate the valve when the fuel reaches a predetermined level in the reservoir below the outlet of'the stand pipe to maintain an open connection between the reservoir and pump and shut off the supply of fuel by the pump to the reservoir for the purpose specified.

7. In fuel feeding means for internal combustion engines, the combination with a liquid fuel. tank and a carburetor of reservoir from which the fuel fed. to the carbu retor said reservoir having a stand pipe; a pump having a suction inlet froin the tank and an outlet in said stand pipe; a valve normally urged to position to close the outlet of the pump in the pipe; and a float in the reservoir operable to open and maintain communication between the pump and reservoir when the fuel reaches a predetermined level in the reservoir below the outlet of the pipe for the purpose specified.

8. In fuel feeding means for internal combustion engines, the combination with a liquid fuel tank and a carburetor of a 1 fed to thereservoir from which the fuel is carburetor said reservoir having a stand pipe; a pump having a suction inlet from the tank and a restricted outlet in said stand pipe; a pivoted float carrying support; and

liquid fuel tank and a carburetor of a reservoir from which the fuel is fed to the carburetor said reservoir havlng a stand pipe; a pump having a suction inlet from the tank and a restricted outlet in .said stand pipe;

a pivoted float carrying support; a valve to close the outlet of the pipe adapted-to open and close the outlet by a bodily movement toward and away from the end of the pipe in a direction in line wit'hthe outlet and laterally of the pipe for the purpose specified. v i

'10. In fuel feeding means for internal combustion engines, the combination with a liquid fuel tankand a carburetor of a reservoir from which the fuel is fedto the car- I buretor said reservoir having a stand pipe;

a pump having a suction inlet from the tank and a restrictedoutlet in said stand pipe; a pivoted float carrying support; a disk valve carried by the float support to engage the outer end of the pipe to close the outlet therein, and adapted to open and close the outlet by a movement toward and away from the end of the pipe in a direction in line with the outlet and laterally of the pipe; and a spring to yieldingly urge the valve toward the-end of the plpe to close the outlet and adapted to be unseated against the action of the spring by the pressure of the fuel vdelivered by the pump.

11. In fuel feeding means for internal combustion engines, the combination with a fuel tank, and a carburetor of a reservoir from which the fuel. islfed to the carburetor said reservoir having a standpipe; a pump having a suction inlet from the tank and a restricted outlet in said stand pipe; a pivotally supported float in the reservoir; a disk valve carried by the float support to engage the outer end of the pipe to close the outlet therein, and adapted to open and close the outlet by a movement toward and away from the end of the pipe'in a direction in line with theoutlet and laterally of the pipe; and a spring to yieldingly urge the valve toward the end of the pipe to close the outlet and adapted to be unseated against the action of the spring by the pressure of the fuel delivered by the pump, said valve having a recessed portion and adapted to have lateral movement imparted thereto to. place said recess in register with the pipe outlet by the float as the fuel rises to a predetermined levelin the reservoirbelow the outlet inthe pipe for the purpose specified.

12. In liquid fuel feeding means for in ternal combustion engines the combination I with a liquid fuel tank and a carburetor of a reservoirfrom which the fuel is fed to the carburetor said reservoir having" a stand pipe; a pump the cylinder of which is arranged to be submerged in the fuel in the reservoir; a suction inlet tothe-pump from the tank; arestricted outlet forthe pump into the reservoir in said stand pipe; a float in the reservoir; a pivotal support for the float; a disk valve, carried by said float support to engage with the end ofthe stand pipe toclose the outlet of the pump and to have movementtoward and away from the end of the pipe; a spring to urge the valve to the end of the pipe to close the outlet, said valve being adapted to be unseated by the pressure of the fuel delivered by the pump, and to have movement imparted thereto laterally of the pipe to uncover the outlet therein by movement imparted to the float support by the float when the fuel reaches a predetermined level .in the reser-, voir below the outlet of the pipeto, control the delivery of the fuel to the reservoir by the pump for the purpose specified.

13. In fuel feeding means for internal" combustion engines, the combination with a liquid fuel tank and a carburetor of a. fuel reservoir from which the fuel is delivered to the carburetor said reservoir havinga stand pipe; a cylinder; a rectproeable piston in said cylinder separatingthecylinder intoa pump chamber at one end of the piston having a suction inlet from the tank and a restricted check valved outlet in said stand pipe in the reservoir, and a motive chamber at the opposite end of the piston open to the engine cylinder,-said piston be ing moved in one direction by the engine iinotive actuating fluid (in the engine cylllO inder; aspring in the pump chamber to urge the piston iutothe motive chamber of pipe; a cylinder in the reservoir arranged to be submerged by the fuel in-the reser-- voir; a reciprocable piston in said cylinder separating the cylinder into apump chamher at one end of the piston having a suction inlet from the tank anda restricted valve controlled outlet in said stand pipe in the reservoir, and a, motive chamber at the opposite end of the piston open to the engine cylinder, said piston being moved in one direction by the engine motive actuating fluid in the engine cylinder; a spring in the pump chamber to move the piston in the opposite direction; and a float in the reservoir connected to the valve of the out- 10 let'of the pump chamber operable to open said valve to shut off delivery of the fuel to the reservoir by the pump when the fuel rises to a predetermined level below the outlet of the pipe in the reservoir for the purpose specified.

Signed at the city of New York, in the county and State of New York, this 11th day of February, 1919.

WILLARD IRVING TWOMBLY.