US2032638A

US2032638A - Combination of carburetor and governor

Info

Publication number: US2032638A
Application number: US733905A
Authority: US
Inventors: Floyd H Steele
Original assignee: HANDY GOVERNOR CORP
Current assignee: HANDY GOVERNOR Corp
Priority date: 1934-07-05
Filing date: 1934-07-05
Publication date: 1936-03-03
Anticipated expiration: 1953-03-03

Description

March 3, 1936. F. H. STEELE COMBINATION OF CARBURETOR AND GOVERNOR Filed July 5. 1934 2 Sheets-#Sheet 1 March 3, 1936. H. STEELE 2,032,638

COMBINATION OF CARBURETOR AND GOVERNOR Filed July 5, 1934 2 Sheets-Sheet 2 Patented Mar. 3, 1936 UNITED STATES PATENT OFFICE COMBINATION OF CARBURETOR AND GOVERNOR Floyd H. Steele, Detroit, Mich., assignor to Handy Governor Corporation, Detroit, Mich., a corporation of Michigan The present invention relates to a combination of carburetor and governor for internal combustion motors and more particularly to anautomatc device associated with the governor to operate the power jet and/or accelerating pump of the carburetor of the motor.

Today most carburetors are provided with some form of power jet which enriches the mixture as the speed or load increases. This jet is usually controlled from the carburetor throttle spindle, the mixture being enriched as the throttle is opened.

When a governor is installed on a motor and `the motor speed controlled by the governor valve,

1 the carburetor throttle is held in a wide Aopen position. Where there is a power jet, this position corresponds to a maximum enrichment of the explosive mixture supplied to the motor. When the governor valve need only. be opened slightly to give the proper speed and carry the load, the mixture furnished by the carburetor is that corresponding to high speed` as the carburetor valve is wide open. Under such conditions the mileage per gallon decreases, and a loss of as much as twenty per cent in mileage may result by equipping the motor with a governor.

One form of carburetor now on the market has an accelerating pump and power jet actuated by a rocker arm operated by a link connection to a crank on the carburetor spindle.

The principal object of the present invention is to provide a governor which has means to take over the operation of said link when the governor is associated with the carburetor, whereby 35 the accelerating pump and fuel jet are no longer operated from the valvespindle. .Thus the loss in mileage which would result if the governor were associated with the carburetor, and no change made in the connections for operating the accelerating pump and power jet, is eliminated.

Other objects and features of novelty will be apparent from the description taken in connection with the drawings, in which:

Figure 1 is a diagrammatic sectional elevation of a carburetor 'and governor constructed in accordance with the present invention;

Figure 2 is a similar view showing a modified power jet;

Figure 3 is a plan view of one form of governor unit built in accordance with the present invention; ,v Figure 4 is a front elevation of the same; and Figure 5 is a side elevation. f Referring to the drawings, the carburetorI C comprises a conduit member IIl having the usual throttle valve Il carried by the valve spindle I2, venturi I3, and mixing tube I4. The carburetor shown is a down-draft carburetor, and so the choke valve I5 is located above the Venturi I3.

To one side of the conduit member is the usual oat chamber i6, the main jet I'I being supplied with fuel from this chamber through the tube I8. Associated with'the float chamber is an accelerating pump, consisting of the bcylinder I9 in which a ball and socket joint 28 to one arm of a twoarmed lever 29, the other arm being connected by a similar ball and socket joint 30 and link 3i, shown in dotted lines, to the end of a crank 32, shown in full lines, on the valve spindle I2. A

suitable ball and socket joint is provided to connect the end of the crank 32 to the link 3 I Other parts of the carburetor need not be shown or described since they have nothing to do with the present invention. i

The carburetor consisting of the above described parts is well-known and is'on the market at the present time. In operation, fuel is supplied through the main jet il in the usual way. When starting up the motor or accelerating, an increased opening of the throttle valve will depress the piston 2l) of the accelerating pump and thereby discharge an accelerating charge through the jet or nozzle 25. .if the throttle is he1d-sui ciently open, say for the upper power range or speed, the piston 2li holds the power jet valve 22 open so that the mixture supplied to the motor is enriched as long as the power jet valve 22 is held open.

As previously stated, the present invention is concerned with the combination of the above described carburetor and a governor. The governor G comprises a governor conduit member 33 having a flange 3l at its upper end adapted to be bolted to the flange 35 on `the lower end. of the carburetor conduit member. The governor -valve 36, disposed Within the gas passage tl of the conduit member, is adapted to control the supply of combustible mixture to the motor so as to maintain the, speed of the motor constant.

any suitable mechanism may be used for controlling the valve 36. As shown, the valve 36 is an unbalanced butterfly valve, and the governor ls preferably of the well-known Handy type, such as described in application Serial No. 369,489, led June 8, 1929, by Arthur A. Bull.-

If this governor were merely associated with the carburetor as thus far described, without any modification of the means lfor controlling the power jet, at speeds or loads requiring. the governor valve to be only partly open there would be a loss in eiiiciency of the fuel consumption. It is the object of the present invention to provide the governor with a device which will eliminate this disadvantage when a governor is associated with a carburetor of the form already described.

As shown, the governorvhas lassociated therewith a cylinder 38 in which is slidably fitted a piston 39. The lower end of the cylinder 38 is connected with gas passage 31 by means of ports 40 and 4I the' port 4I opening into the passage on the low pressure side of the governor valve, that ls to say, on the down-stream side of the governor valve. 'Ihe subatmospheric pressure in the gas passage 31 tends to move the piston 39 downwardly, which motion is opposed by the spring Y through the cylinder head 44 and at its upper end has a ball constituting one member of a ball and socket joint. The piston rod 4,3 is of such length that the link 3| may be disconnected at its lower end from the crank 32 and said lower end connected to the ball 45.

Thus it will be seen that the control of the accelerating pump and the power jet is taken over by the spring 42 and subatmosp'heric pressure in the gas passage 31. .The position of the carburetor throttle I I no longerhas any influence on these parts. In operation, when the motor is dead, the accelerating pump piston 20 is in its lowermost position, being iorcedthere by spring 42, the power jet is open, and the governor valve is open. In starting the motor, the choke valve I5 is usually closed whereby turning over the motor with the starter produces reduced pressure in the passage 31 which pulls down the governor piston 39, thereby raising pump piston 20 and permitting the power jet valve 22 to be closed. However, if the choke valve is promptly opened, the pressure in passage 31 will rise so that the spring 42 can act to force piston 39 upwardly and piston 20 of the accelerating pump downwardly, thereby giving an accelerating charge to the mixing tube. If the carburetor valve is left open, the speed of the motor will increase until it reaches f the governed speed, whereupon the governor valve 36 will move in a vclosing direction, reducing the pressure in the passage 31 and thus causing the piston 2li to rise in the accelerating pump.

With the motor idling and the car at rest, the carburetor valve is substantially closed, the governor valve is open, the governor piston 39 is down due to the closed position of the carburetor valve, and the accelerating pump piston 20 is in its upper position. yNow, if it is desired to start the car in motion, the carburetor throttle valve is opened substantially, whereupon the governor valve 33 will remain open until the motor reaches the governed speed.

Immediately after opening ythe carburetor valve fo start the car, the governor piston 39 is forced upwardly by the spring since the pressure in the passage 31 increases. This motion of piston 39 forces the pump piston 20 downwardly to supply 'aosao'ss an accelerating charge to the nozzle 'Furthermore, thev piston 20 will hold the power jet valve f 22 open until the governed speed is reached, when the pistons take positions dependent on the reduced pressure in the passage 31. If the engine is operating in the upper load range, the governor valve will be opened wide enough so that the spring 42 will overcome the suction on piston 39,

and the pump piston 2li will be held downy and keep the power jet valve open. If the engine is operating in a lower power range, the governor valve more nearly closes, and the resulting reduced pressure in the passage 31 will pull the governor piston 39 downwardly, resulting in raising the pump piston 20 and permitting the power jet valve 22'to close. If the motor is operating at governed speed and it is desired to reduce the same, then the carburetor throttle is closed more than the governor throttle. This increases 'the `vacuum or reduction of pressure in the passage 31 and causes the pump piston to rise, permitting the power jet valve 22 to close.

Where the motor is operating below the governed speed and it is desired to accelerate up to governed speed, the governor valve will be open. To accelerate, the carburetor throttle is opened, thus increasing the pressure in the gas passage 31 and causing the accelerating pump piston to' move downwardly, lsupplying an accelerated charge to nozzle 25 and opening the power jet valve 22, which will remain open as long as the load on the motor is suillcient to require a substantial opening of the governor valve.

In the form of the invention illustrated inrig- Y Vure 2, instead of having the power jet operate only through the upper load range, means is supplied whereby, as load or speed conditions require it, the fuel supplied through the power jet valve increases gradually with increased speed or increased load. To accomplish this result, as shown to the lower end of the accelerating pump piston 20 and cooperates with a valve opening 22b in the plug 22- This valve is guided and pressed upwardly by a spring 22d. It is thought to be apparent that as the accelerating pump piston 20 is moved downwardly, the conical valve 22 will vmove with it, thereby increasing the annular opening between it and the plug 22.

As previously stated, the governor valve 36 may be controlled in any suitable manner so as to maintain the motor at a constant xed speed. Whatever form of governor control is employed, the vacuum cylinder 38 is directly associated with the governor conduit member or block 33. Preferably the cylinder is cast integral with the block.

One form of preferred governor unit is illustrated in Figures 3, 4, and 5. This governor is of the suction type; that is to say, the governor valve is controlled by the suction, vacuum, flow of gases, or a combination of two or more of these items. As shown, the conduit member or governor block 33 is provided with two gas passages 31, the governor and carburetor being adapted for an eight-cylinder motor. The governor valves 36 disposedin these gas passages and mounted on spindle 36" are shown type,

Mechanism for balancing the closing forces as of the unbalanced acting on the unbalanced valves is housed -in the is shown and described in Patent No. 1,604,283, granted October 26, 1926.

The conduit member or governor block 33 has the vacuum cylinder 38 cast therein. 'I'he piston 39 of this vacuum' cylinder has its piston rod 43 projecting upwardly and provided at its upper end with a ball 45, which, with the lower end of the link 3|,'forms a ball and socket connection between the two. As previously stated, the length of the piston rod 43 is such that the ball 45 may be easily connected to the lower end of the link 3l, and the positions of the piston of the accelerator pump will be the same when thus connected as when the lower end of the link is connected to the crank 32. The port 4| connecting the lower end of the vacuum cylinder and one of the gas passages 31 is clearly shown in Figures 3 and 4.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. The combination with the carburetor for an internal combustion motor having a conduit member, a throttle valve therein having a crank, a main jet, a power jet, a lever pivoted on the carburetor to control said power jet, and a link of proper length to connect said lever and crank but disconnected from the latter; of a governor comprising a conduit member in alignment with the carburetor conduit member, a governor valve in the governor conduit, means to actuate said governor valve to maintain the motor at a substantially constant speed, a cylinder associated with said governor conduit member in communication with the governor conduit on the downstream side of the governor valve, a piston in said cylinder actuated in one direction by thevacuum on the downstream side of the governor valve, a spring to move the piston in the other direction, and a piston rod for the piston projecting from the cylinder, the lower end of said link being connected to the upper end of said piston rod to operate the lever, substantially as described.

2. The combination with the carburetor for an internal combustion motor having a conduit member, a throttle valve therein having a crank, an accelerating pump, a power jet controlled by the piston of the pump, a lever pivoted on the carburetor to actuate said piston, and a link of proper length to connect said lever and crank but disconnected from the latter; of a governor comprising a conduit member in alignment with the carburetor conduit, a governor valve in the governor conduit, means to actuate said governor valve to maintain the motor at a substantially constant speed, a cylinder associated with said governor conduit member in communication with said conduit on the downstream side of the governor valve, a piston in said cylinder actuated in one direction by the vacuum on the downstream side of the governor valve, a spring to move the piston in the other direction, and a piston rod for the piston projecting from the cylinder, the lower end of said link being connected to the upper end of said piston rod to operate the lever substantially as described.

3. A governor for internal combustion motors comprising, in combination, a conduit member having a throttle valve therein, means to actuate said valve to maintain the motor at a substantially constant speed; a cylinder associated with said `member in communication with said conduit on the downstream side of said valve, a piston in said cylinder actuated in one direction by the vacuum on the downstream side of the valve, a spring to move the piston in the other direction, and a piston rod for the piston projecting from the cylinder and of proper length to be connected to a link of a carburetor designed to control the power jet of the carburetor substantially as described.

4. The combination with the carburetor for an internal combustion motor having a conduit member, a throttle valve therein having a spindle, a fuel system discharging into said conduit, means to change the richness of the mixture discharged by said fuel system including a member actuated by said spindle when the carburetor without a governor is used but disconnectible atone end when a governor is used; of a governor comprising a conduit member in alignment with the carburetor conduit member, a governor valve in the governor conduit, means to actuate said governorvalve to maintain the motor at a substantially constant speed, a cylinder associated with said governor conduit member in communication with the governor conduit on the downstream side of the governor valve, a piston in said cylinder actuated in one direction by the vacuum on the downstream side of the governor valve, a spring to move the piston in the other direction, and a piston rod for the piston projecting from the cylinder, the upper end thereof being connected to the disconnected end of said member substantially as described.

5. The combination with the carburetor for an internal combustion motor having a conduit member, a throttle valve therein having a spindle, a crank on the spindle, a fuel system discharging into said conduit, means to change the richness of the mixture discharged by said fuel system including a link; of a governor comprising a conduit member in alignment with the carburetor conduit member, a governor valve in the governor conduit, means to actuate said governor valve to maintain the motor at a substantially constant speed, acylinder associated with said governor conduit member in communication with the governor conduit on the downstream side of the governor valve, a piston in said cylinder actuated in one direction by the vacuum on the downstream side of the governor valve, a

spring to move the piston in the other direction,

a piston rod for the piston projecting from the cylinder, and means to selectively .connect one end of said link to the crank or upper end of said piston rod substantially as described.

6. As a unit of manufacture, a complete governor for internal combustion motors, comprising, in combination, a conduit member having a throttle valve therein, means to actuate said valve to maintain the motor at substantially constant speed, a cylinder cast in said member in communication with said conduit on the' downstream side of said valve, a piston in said cylinder actuated in one direction by the vacuum on the downstream side of the valve, a spring to move the piston in the other direction, and-a piston rod for the piston projecting from the cylinder and designed to be connected to a member of a carburetor which controls the power jet thereof, substantially as described.

FLOYD H. STEELE.