US1584931A - Governor - Google Patents

Description

May 18, 1926. 1,584,931

R- G. HANDY ET AL GOVERNOR Filed May 8, 1922 El. y

J wo VM,

PatentedMay 18,1926.

UNITED I STATES 1,584,931 PATENT OFFICE.

ROBERT a. nanny Ann ARTHUR A. BULL, or DE ROIT, mronrcnn, AssIeNoRs To HANDY GOVERNOR ooRroRATIo v, or DETROIT, MICHIGAN, a CORPORATION or MICHIGAN.

GOVERNOR.

' Application filed May 8,

' The present invention relates to governors; more particularly forc hydrocarbon motors and of the type actuated by suction in the intake of the motor, being a specles 6 of the invention described and claimed 1n application Serial No. 383,259.

If the intake of a hydrocarbon motor is obstructed, it is found that the' vacuum therein on the cylinder side of the obstruc- 10 tion increases veryrapidly as the obstruction becomes morej complete; that is to say, the vacuum increases at an accelerated rate as distinguished from a uniform or regular rate, when the motor is operating at a constant speed. As is well known, a spring or similar yielding device offers a gradually increasing resistance as it is deformed. Hence governors of'the type mentioned, which employ a throttle valve actuated, or controlled,

9 by vacuum inthe intake conduit, cannot be directly balanced by a spring at all positions of the valve,-when the engine is operating at a constant speed. The spring may balance the governor at one or at two positions of the valve, but will not balance the same at any other points. In order therefore thatthe governor may maintain a predetermined engine speed under varying loads and valve positions, it is necessary to 39 introduce a correcting means between the suction actuated motive device and the -counterbalancing spring.

A suction controlled governorcan be em bodied in several different "forms. In its simplest form the governor may consist of an unbalanced valve pivoted in the intake conduit and counterbalanced bya spring through'the mediumv ofa corrective mechanism. A governor of this description is dis- 40 closedin application No. 383,259. referred to.

above. In the governor described in said prior apphcation, the valve operates both as a throttle means and as the suction re-I sponsive element. In this form the elements of the. governor hav'ebeen reduced and consolidatedinto the fewest possible number. of arts and representaprobably the highest evelo ment of the suction actuated goveranor. owever, it is desirable, in some cases,

, 9-, to use a balanced-throttle valve, or a throttle valve which; not depend upon the suc- {.i-i'onefiect directly onit to actuate it, and in -gsuclij; cases it is necessary to employ a separat'euctibfif actuated motive element or operating theivalve. governor which e npresent invention:

I922. Serial'No. 559,484.

stant, in which case the counterbalancmg force may act on any part of the governor through the mediumbf a corrective mechal5 msm.

2. The suction responsive member may be opposed by a spring or other yielding force and said member connected with the valve through a corrective mechanism which will correlatethe movements of the member and valve to give the desired governor action. The. second of the types just mentionedis described and claimed in our copending application No. 559,435. The present invention has to do with the first type. It comprises a throttle valve in the intake passage, a suction responsive member connected to the intake passage at a point between the valve and the intake manifold, means connecting the suction responsive member and the throttle valve to operate the latter in accordance with movements of the former, yielding means acting on said connecting means to oppose movement of the valve towards closed position, and means modifying the action of said yielding meansto balance the effects of the suction and'the yielding means on said member in all positions of the valve when the motor is operating at a predetermined governed speed. Referring to the accompanying drawin s, which illustrate one embodiment of t e Figure 1 is a side elevation, partly in section, of a governor constructed in accordance with the present invention;

Figure 2 is a vertical section on line 2-2 of Figure 1;and

Figure 3 is a side elevation looking from a position at right angles to Figure 1.

Thenumeral 10 designates a hollow casting having end flanges 11, adapting it to be see at some convenient point in the in- 105 take oonduit'of ahydrocarbon motor. l he casting forms aconduit 12, preferably 6frectangular cross section, and achamber 13. Thegovernor valve 14 is preferablly of the pivoted butterfly type; and, m t 0 form' illustrated, consists'of a rectangular plate secured along its transverse center line to astem 15, which is pivoted in bearings formed in the walls of the conduit. The valve is therefore balanced against suction effects. As shown in Figure 2, one end ofstem 15 projects intochamber 13, and has secured thereon anarm 16 which carries at right angles to. its outer end a pin, on which is journaled an anti-friction roller 17 and one end of alink 18. The other end oflink 18 is pivoted to alug formed on the face of apiston 19, which operates in acylinder 20 bolted to casting 10. The cylinder casting has formed therein aduct 21 which communicates withconduit 12 at a point located between thevalve 14 and the intake manifold of the motor. Pivoted inchamber 13 is acam arm 22 having attached to its free end one end of'aspring 23, the other end of said spring being connected to a swivel 24 carried by an adjustingscrew 25 which is threaded through the wall ofchamber 13. As clearly shown in Figure 1,arm 22 is formed with acam surface 22 which is held in yielding engagement with roller 17 by thespring 23.Chamber 13 may be closed by asuitable cover plate 26.

Normally, that is when the motor is not running,valve 14 is held in fully open position by the operation ofspring 23 acting onarm 16 through the medium ofcam arm 22. When the motor is running the vacuum in the intake, caused by pump action of the engine pistons, is also produced in the cylinder space at the right ofpiston 19, and atmospheric pressure on the other side of said piston tends to cause movement thereof towards the right, as viewed in Figure 1; and, through the connections described, tends'to cause the valve to move towards closed position. The valve will assume a position such as to cause the motor to run at the 'pre determined speed for which the govern'or'is adjusted, and the position assumed by the valve will of course depend upon the load on the motor. The parts are so constructed and proportioned that thespring 23 exactly counterbalances the suction effort onpiston 19 in all positions ,of valve 14:, when the engine is running at its predetermined governed speed. If the speed of the engine varies from this governed speed the balance will be destroyed and thepiston 19 will move to the right or left, closing or 0 ening the valve, as the case may be, an reestablishing the governed speed.

As heretofore pointed out, the resistance of a s ring gradually increases as it is deform while the vacuum in the intake increases at an accelerated rate as the valve is moved towards its closed position, with any constant B. P. M. As disclosed in said prior application, these efforts are equalized by a corrective or compensating means in order that the corrective means employed should a have this capability, for the" reason that it is impossible to design any kind of corrective means merely from theoretical data. This results from the fact that the effort acting on the motive element of the governor is a variable which depends on the position and shape of the valve, the speed of the motor, the load thereon, and numerous other factors, the effects whereof cannot be predetermined but are kndwn only by actual trial, and therefore cannot be compensated except by a corrective means which permits of alteration from its theoretical design at different positions of said means. In the case of a cam any part of the cam surface can be altered and a cam contour produced empirically which will give any desired governor performance.

Changes may be made in the specific construction described without affecting the essentials of the invention. It is obvious, for instance, that a diaphragm may be substituted for the piston, that the spring may be applied at other points than that shown, that the valve may be of a different type, etc.

Having thus described our invention what tion, and cam mechanism modifying the action of said spring to balance the suction and spring effects on said member in all positions of said valve when the motor is operating at the predetermined governed speed.

2. A suction responsive governor for hydrocarbon motors including in combination, a throttle valve in the fuel intake passage, 2. member responsive to the suction in said intake passage on the-cylinder side of said valve, means connecting said member and valve operating the latter in accordance with the movements of the former, yielding means wing the action of opposing movement of said valve towards closed position, and cam mechanism modifysaid yielding means to balance the suction and yielding means efiects on said member in all positions of said valve when the motor is operating at the predetera predetermmed speed, and means connectmined governed speed.

.3. A suction responsive governor for hydrocarbon motors including in combination, a throttle valve in the fuel intake passage a member responsive to the suction in said intake passage on the cylinder side of said valve, means connecting said member and valve operating the latter in accordance with the movements of the former, a spring, and cam mechanism between said spring and said connecting means varying the effective force of said spring on said connecting means to balance the efiects of the suctionand spring on said member in all positions of said valve mined speed. I y I 4. A suction responsivegovernor for hydrocarbon motors includin in combination,

a throttle valve in the fue intake passage,

means forming a chamber adjacent said throttle-valve, a member operating therein, said chamber communicating with the atmosphere on one side of said member and communicating on the opposite side of said member with the intake passage at a pomt between said valve and the intake manifold, means connecting said valve and member,

and yielding 'means; opposing movement of;

said valve. towards closed position, said yielding means including cam mechanism for modifying the action thereof to balance the efiects of said suction and yielding means on said member in all positions of said valve when the motor is operating at a predetermined speed.

5 A suction responsive governor for hy drocarbon motors including in combination, a throttle valve in theciuel intake passage,

a member controlled by the suctiono in the intake passage, yielding means-opposing movement of said member in response to increase of the suction effect thereon, said yielding means including cam mechanism modifymg the eifective opposition thereofto said suction efiect to balance said member in all positions when the motor is running at valve, a member controlled by the suction in the intake passage connected with said arm, a spring and means connecting said o I n l spring and arm, said connectmg means 1ncluding a cam to modify the force exerted by said -s pring',on said arm to balance said member in all positions when the motor is running at a predetermined speed.

drocarbon motors including in combination, a pivoted throttle valve in the intake passage, an arm rigid with the pivot of said valve, a member controlledby the suction in the intake passageronnected to said arm, yielding means-operating on said arm and opposing movement of said valve towards closed position, said yielding means constructed and arranged to balance said memher. in all positions thereof when the motor is operating at a predetermined speed.

8. A suction responsive governor for by? drocarbon motors including in combination, a pivoted throttle valve in the" fuel intake passage, an arm rigid with the pivot of said valve, a member controlled by the suction in the intake assage connected to said arm, a spring, an cam mechanism between said spring and arm for balancing said member and valve in all positions when the motor is running at a constant speed. In testimony whereof we our signatures. 1

' ROBERT G. HANDY.

ARTHUR A.. BULL. r

hereunto aflix 7'. A. suction responsive'governor for'hy- I

Images