US2567753A

US2567753A - Hydraulic governor

Info

Publication number: US2567753A
Application number: US652137A
Authority: US
Inventors: Alfaro Heraclio
Original assignee: American Bosch Arma Corp
Current assignee: Ambac International Corp
Priority date: 1946-03-05
Filing date: 1946-03-05
Publication date: 1951-09-11
Anticipated expiration: 1968-09-11

Description

Sept. 11, 1951 H. ALFARO HYDRAULIC GOVERNOR Filed March 5, 1946 HEEACLIO ALF'AEO INVENTOR. fi

ATTORNEY Patentecl Sept. 11, 195 1 HYDRAULIC GOVERNOR Heraclio Alfaro, Springfield, Mass., assignor to American Bosch Corporation,

Springfield,

Mass., a corporation of New York Application March 5, 1946, Serial No. 652,137

1 Claim.

This invention relates to hydraulic governors for internal combustion engines and has particular reference to a new and improved hydraulic governor adapted to be operated by oil from the engine oil supply and which is relatively simple and economical in construction yet efflcient in operation.

An object of the invention is to provide a new and improved hydraulic type governor which is relatively simple and economical in construction yet efiicient in operation.

Another object of the invention is to provide a new and improved hydraulic type governor of the type set forth which is adapted to be operated by the oil supply of an internal combustion engine.

Another object of the invention is to provide a new and improved control means for a hydraulic governor of the type set forth.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the acompanying drawing. It will be understood that many changes may be made in the details of construction and arrangement of parts without departing from the spirit of the invention as expressed in the accompanying claim, and, therefore, the preferred form of the invention has been shown by way of illustration only.

Referring to the drawing:

Fig. 1 is a sectional view of a governor constructed according to the invention;

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1 looking in the direction of the arrows; and

Fig. 3 is a fragmentary, sectional view taken on line 3-3 of Fig. 1 looking in the direction of the arrows.

Referring more particularly to the drawing, wherein similar reference characters designate corresponding parts throughout the several views, the hydraulic governor shown embodying the invention comprises a supporting frame having a limb or flange H' through which extends the shaft l2 which is supported thereby and which is connected to the self-aligning drive shaft l3 which has one end I splined for connection with the drive shaft of the engine and having at its opposite end a spline construction arranged to permit smooth axial sliding by means of the four balls l6 held in the cross-like cage i! which is retained between the end l of the shaft I3 and the adjacent end of the shafts I2.

On the shaft I2 is provided the spinner 5 which is adapted to rotate at cam shaft speed upon rotation of the shafts l3 and which spinner I8 is adapted to slide axially in the chamber 19,

acting as a detector. The spinner [8 has the

marginal flanges

20 and 2|.

In the frame or support [0 are provided the pressure inlet ports or

lines

22 and 23 which provide fluid for operating the servomotor and detector valve. The line 22 is connected to the oil supply of the engine on which the governor is employed and is adapted to be aligned with either of the

grooves

23a or 24 in the circumference of the shaft 12.

The line 23 is connected to the servomotor cylinder 25 and is likewise connected to groove 26 adapted to be aligned with either of the grooves 2311 or 24 in the shaft 12.

In the frame or support [0 there is also provided a low pressure sump 21 adapted to contain oil at atmospheric pressure and which has an outlet 28, and which is connected to the pressure inlet line 22 through the

lines

29 and 30 to retain the low pressure sump 21 filled with oil. In these lines is a restriction 29a.

The servomotor cylinder 25 is connected to the low pressure sump 27 by the opening 3|.

On the frame or support l0 adjacent the periphery of the spinner I8 is provided the impact tube 32 which is provided for the purpose of increasing the dynamic pressure created dynamically by the rotation or spinning of the spinner l8. This impact tube 32 is connected by the lines 33 and 34 with the chamber I9. If desired, the flange 20 on the spinner l8 may be omitted in which event the impact tube 32 could also be omitted.

The controls or control levers provided may be arranged to suit the particular engine on which the device is employed, and include a manual speed setting or control lever 35, the actuator lever 36 and the servomotor compensating lever 31. The compensating lever 31 is pivotally connected at one end to the lever or rod 38, which, in the case of a Diesel engine, is connected to the injection pump capacity control, or in other engines is connected to the throttle.

The lever 35 is pivotally mounted at 39 to the bracket 46 which is adjustably mounted on the frame or support [0 such as by a serrated adjustment ll as shown in Fig. 1 of the drawing.

The lever 35 is connected to the lever 31 by suitable means as by the pin 42 and slot 43 as shown and is thus adapted to actuate the compensating lever 37 which, in turn, adjusts the spinner l8 through the rod 44 connected to the lever 31 and the coil spring 45 which is interposed between the rod 4 3 and the spinner l8, and urges the spinner away from the rod 44 and also adjusts the rod 44 according to movement of the spinner IS. The lever 35 is also adjusted by the servomotor piston 46 through the rod 41 which is also connected to the compensating lever 31, and simultaneously the rod 38 is adjusted to adjust the injection pump capacity control in the case of a Diesel engine or the throttle in the case of other engines. As shown, the levers may be exposed and can be covered by a sheet metal stamping, or else three oil seals for the rods should be provided.

As shown, the coil spring 25a in the servomotor cylinder 25 engages the servomotor piston and normally urges it toward the end of the line 23.

The servomotor is of the single acting type having a spring 25a that will cut off the fuel delivery in case the hydraulic system should fail.

The compensating lever 31 also functions as a presetting device, that is, the controls may be adjusted manually toward the desired speed, and the servomotor readjusts the controls to the exact setting required.

In the operation of the governor when the shaft [2 is moved to the'left, in which direction it is normall urged by the coil spring 45, the pressure inlet line 22 and the line 23 are connected through the circumferential groove 2% on the shaft l2 and the oil is fed to the servomotor and pushes back the servomotor piston 46 against the action of the spring 25a and through the piston rod 4'! which is actuated by movement of the piston 26, causes movement of the compensating lever 31 which automatically adjusts the lever 38 to increase the amount of fuel supplied to the motor. This continues until the speed of rotation of the shaft [2 and spinner I8 is such that the flow of oil flowing through the ports Q8 in the spinner i8 and passing through the impact tube 32 and line 33 is of such force as to move the spinner 18 against the force of the coil spring 45 and through the rod &4 adjust the lever 31 and rod 38 to'cut down the supply of fuel to the motor which reduces the speed of the shaft [2. When the shaft 12 and spinner [8 have moved a, sufiicient distance against the action of the spring 45, the circumferential groove 23a on the shaft I 2 is aligned with the pressure inlet line 23 and the oil passes through the opening 49 in the shaft I2 to the low pressure sump 2'! from which it flows through the outlet 28 to the circulating system.

As pointed out above, the rim or edge 20 on the spinner could be removed and such removal might even facilitate the axial movement of the spinner.

It is pointed out that with the construction of this invention the oil supply pressure may vary within a, wide range without necessaril affectin its operation. Also, the spring rate of the servomotor spring need not be precise.

It i particularly pointed out that with the present construction the actual movement of the spinner against the action of the spring is effected by fluid pressure created by the rotation of the spinner itself.

From the above it will be seen that I have provided simple, efiicient and economical means for obtaining all of the objects and advantages of the invention.

Having described my invention, I claim:

, In a. hydraulic governor, a bore, a shaft in said bore and adapted to be rotated by the engine with which the governor is employed, a spinner on said shaft, said spinner having radial fluid passage means, a lever for controlling the supply of fuel to the engine, a fluid inlet line connected to said bore, an impact tube tangential to said radial fluid passage means for increasing the pressure of fluid received from said radial fluid passage means whereby pressure of fluid from said radial passage means will actuate said spinner and shaft in a direction along the axis of said shaft and means connected to said control lever and resiliently urging said spinner against the action of fluid from said radial passage means, a compensating lever connected to said lever for controlling the supply of fuel to the engin and a servomotor operativel connected to said compensating lever, a fluid passageway connecting said bore and servomotor, said servomotor being actuated by fluid from said pressure inlet line and adapted to automatically control said compensating lever and thereby adjust the supply of fuel to the engine, and a second control lever for manually presetting the supply of fuel to the engine.

HERACLIO ALFARO.

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

UNITED STATES PATENTS Number Name Date 794,898 Stumpf July 18, 1905 1,762,357 Schmidt June 10, 1930 1,986,415 Schmidt Jan. 1, 1935 2,247,989 Cita July 1, 1941 2,378,558 Kalin June 19, 1945 FOREIGN PATENTS Number Country Date 262,172 Great Britain Nov. 29, 1926