US2607570A - Diesel carburetor attachment - Google Patents

Description

19, 2 D. R. BARNETT 2,607,570

DIESEL CARBURETOR ATTACHMENT Filed Aug. 26, 1946 INVEN TOR.

Daniel R. Barneii. BY

I ATTORNEY.

Patented Aug. 19, 1952 UNITED STATES PATENT OFFICE DIESEL CARBURETOR ATTACHMENT Daniel R. Barnett, Long Beach, Calif.

Application August 26, 1946, Serial No. 693,142

2 Claims. (01. 261-18) This invention relates to a diesel oil carburetor attachment which can be mounted on the usual internal combustion engine whereby diesel fuel can be burned in the engine.

An object of my invention is to provide a novel diesel oil carburetor attachment which may be mounted between the usual gasoline carburetor and the intake manifold, and which will meter diesel fuel into the intake manifold when the throttle valve of the attachment is opened.

An object of my invention is to provide a novel diesel oil carburetor attachment which can be simply and easily mounted on the usual internal combustion engine, and is provided with a control operating coincidentally with the throttle valve of the gasoline carburetor.

Another object of my invention is to provide a novel diesel oil carburetor attachment of the character stated in which the metering valve operates simultaneously with the throttle valve.

A feature of my invention resides in the novel means of closing the throttle valve of the gasoline carburetor when the diesel carburetor attachment is being operated.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description and appended claims.

In the drawing:

Figure 1 is a side elevation of my diesel carburetor attachment with parts broken away to show interior construction.

Figure 2 is a side elevation of the same showing the side opposite to that illustrated in Figure 1.

Figure 3 is a sectional view taken on line 33 of Figure 1.

Figure 4 is a side elevation of the metering valve disc.

Figure 5 is a perspective view of the carburetor attachment.

Referring more particularly to the drawing, my diesel carburetor attachment I is mounted between the gasoline carburetor 2 and the intake manifold 3. My attachment consists of an adapter 4 which is bolted to one end of the carburetor 2, and at the other end to the intake manifold 3. A bore 5 extends vertically through the adapter to permit the flow of gas from the carburetor 2 into the intake manifold. The adapter 4 is formed as a T and a second bore 6 extends horizontally into the bore 5. An air horn I opens into the bore 6 and this horn is bolted or otherwise fixedly attached to the side of the adapter 4.

An air valve 6 is urged into closed position by the spring 9. A gasoline throttle valve I0 is mounted in the bore 5 on the shaft I I. This throttle valve controls the flow of gases from the gasoline carburetor 2 and replaces the usual carburetor throttle valve. A diesel throttle valve I2 is mounted in the bore 6 on a shaft I3. A diesel fuel metering valve I4 consists of adisc fixed to the shaft I3. This valve is formed with an arouate tapered groove I5, the purpose of this groove being to meter the fuel into the carburetor as will be further described.

An intake duct I6.in the body of the adapter 4 opens against the face of the disc I4. An outlet duct I'I also opens against the face of the disc I4 and is spaced from the duct I6. The groove I5 operates over the open ends of the ducts I6-II and into the taper of this groove. The amount of fuel passing from I6 into I! will be determined by the position of the groove I5.

A fuel intake pipe I8 extends into the duct I6 and a fuel outlet pipe I9 extends from the duct I1. The fuel outlet pipe I9 extends into an exhaust pipe 20 which extends from the exhaust manifold 2I into the air horn 1. Thus the metered fuel is carried into the bore 6, together with a small quantity of hot exhaust gases. The diesel fuel will thus be heated and will also be atomized by the exhaust gases flowing through the pipe 20.

A throttle arm 2I is attached to the outer end of the shaft I3 and this throttle arm is controlled by the foot throttle of the vehicle (not shown). To close the throttle valve I0 when the throttle I2 is being operated, I may include the following structure: An arm 22 is attached to the end of the shaft II. An arcuate spring finger 23 extends from the arm 22 and is engaged by the lug 24 on the throttle arm 2I. Thus as the arm 2| is swung downwardly as viewed in Figure 2, the lug 24 will engage the end of the finger 23, and will swing the throttle I0 into closed position. To hold the throttle I0 closed, I provide a pin 25 in the arm 22 and this pin moves over the cam 26 and rides on the outer peripheral curved edge of this cam while the arm 2I is moved to control throttle valve I2. Thus the arm 2| can move back and forth to adjust the throttle I2 and the throttle I0 may be held closed. To release the throttle I0, the arm 2I is moved upwardly to the fullest extent, and the pin 25 will slip over the end of the curved surface of the cam 26, the pin 25 rides over the inclined slope of the cam 26, and snaps over the outer edge of the cam to hold the arm 22, down, and the valve I0, closed. A

disc 14 moves with the arm 2! and these two parts are connected by a pin 21. A coil spring 28 bears against the disc M to hold it tightly against the face of the adapter 4.

In operation, my carburetor attachment is intended to be used primarily with a diesel fuel and the gasoline throttle I is only used in starting. Consequently, the throttle valves l0 and [2 are synchronously used in starting and then as soon as the engine starts the valve is latched in a closed position. When the arm 21 is moved downwardly to open the throttle I2, the finger 23 is engaged and this moves the throttle [0 towards closed position. In other words, as the throttle I2 opens, the throttle l0 closes. When it is desired to shut off the gasoline supply,.the throttle I2 is moved to fully open position just momentarily and this moves the pin 25 over the face of the cam 26 and causes the pin 25 to drop over the periphery of the cam 26 which holds the throttle I0 fully closed and permits the throttle l2 to be manipulated from fully closed to almost fully open position.

Having described my invention, I claim:

1. A carburetor attachment comprising an adapter having a bore extending therethrough, and an air intake port opening into said bore, a throttle'valve in said port, a metering valve connected to said throttle valve and operating coincidentally therewith said metering valve consisting of a disc having a tapered groove therein, said adapter having a fuel intake duct and a fuel outlet duct, both of said ducts opening against the face of the said disc, and a fuel outlet pipe extending from the outlet duct into the air intake port, a second throttle valve mounted in said bore, an arm attached to said second throttle valve, a finger extending from said arm, a second arm attached to the first named throttle valve and means on the last named arm, engaging said finger, whereby the second throttle valve is closed when the first named throttle valve is opened, a cam on the last named arm, a pin on the first named arm engaging said cam, whereby the second throttle valve is heldin closed position.

2. A carburetor attachment comprising an adapter having a bore extending therethrough, and an air intake port opening into said bore, a throttle valve in said intake port, a second throttle valve mounted in said bore, an arm attached to said second throttle valve, a finger extending from said arm, a second arm attached to the first named throttle valve, and means on the last named arm engaging said finger whereby the second throttle valve is closed when the first named throttle valve is opened, a cam on the last named arm, a pin on the first named arm engaging said cam whereby the second throttle valve is held in closed position.

DANIEL R. BARNETT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,374,262 Wasserlein Apr. 12, 1921 1,801,684 Olerich Apr. 21, 1931 2,114,548 Stadlman Apr. 19, 1938 2,206,824 Behling 1 July 2, 19 40 2,339,867 Mann Jan. 25, 1944 FOREIGN PATENTS Number Country Date 15,825 Great Britain Nov. 9, 1915 r-fr

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