US2669229A - Governor - Google Patents

Description

Filed Dec. 21, 1948- E. M. BIMB ERG GOVERNOR 2 Sheets-Sheet 1 IN V EN TOR.

E915: M. Bmazzo ATTORNEY merits.

Patented Feb. 16, 1954 D PATENT OF CE GUVERNOR Elmer M. Bimlierg, "Detroit,' Mich, assignor to Bendix Aviation Corporation, South Bend, 1116.,- a; corporation of'Delaware ApplicationzDecemb'er 21, 1948,: Serial N 66,451

I Claims.

The present invention relates" to governors for internal: comhustion engines; especially? for auto:- motivevehicles, and more particularly to. governors of the centrifugal weight type for regulating" the speed oi the engine by'controlling the flow of air or fuel-air mixture-to the engine.

On standard engines, the power take-0E adapted for installation of a;- centrifugal govother and the air valve controlled by the governor are often so arranged in relation to one another that a direct drive or linkage for the governor cannot be used. This has often made the: use of a centrituga'l type: governor impractical. It is vtherefore one of the principal objects ot'the present invention. to provide a centrifugal governor which. is readily adaptable for use on any internal combustion engine irrespective of therelative positions of the power take-off for the governor and the air control valve in the induction passage of the ens-me;

Another object of the invention is to provide ameans' for controlling the speed of an internal combustion engine, which can easily hevinstalled on any internal combustion engine and. thereafter readily adjusted to give the desired. max-imam-engine speed.

A further object of the inventionis to provide an accurate and dependable motion transmitting meana'between two parts of a governor; or the like,- such as the centrifugal: weight assemh ly andthe main governor spring and air valve assembly.-

Additional objectsand advantages of my inventiorr will appear from the following description and accompanying drawings, wherein two arrangements of the invention are disclosed; The invention hereinafter described is not limited to the particular embodiments disclosed, but is understood to be available in any case wherein the centrifugal weight type mechanism is employed to control another element or mechanism, such as avalve for controlling the flow of air or fuelair' mixture to the engine or a fuel valve for controlling the flow of fuel in a tuel supply system for an engine or the like;

In the drawings:

Figure 1 is a side elevation of an internal combustion engine on which the present governor is mounted;

Figure? is a cross-sectional View of my gov ernor showing the several elements thereof in operative relationship; and

Figures is a fragmentary cross-sectional view of the governor showing a'modi-fied form of the connecting .means between two governor ele- Referring more specifically to the drawings, and to Figure 1 in particular, in which side ole-- vation ot a conventional internal oom bus'tionem gine is shown, numeral IE3 designates a crank case, 52 a power take-off from thewoamr shaft not shown) M an: element of my governor including the centrifugal weight assembly IS an intake manifold, 18 a conventional carburetor, and 28- another element of the governorihcludingi the main governor spring, mounted on said carburetor at the throttle valve or on a, governor air valve body connected to the governor element 4 by a power transmitting member 22.

In Figure 2 of the drawings, an air valve 30, which, in the present example is the throttle valve of the carburetor, is shown mounted in the. induction passage on; a shaft 32, one end of which extends into housing 34- of the governor element 2%... In some installations the air valve may be mounted in a separategovernor body and operated independently of the throttle valve. A lever 36 is mounted on the end of throttle valiv'e shaft 3-2 and, is held in fixed position in relation to-said shaft by a nut 38 threaded onto the endof the shaft. Throttle valve at is constantly urged toward Wide open position and caused to follow a one way manually actuated throttle control means tnot shown), such as that disclosed in application Serial No. 7361,1 18, now Patent No, 2,613,657, filed March 25,1947, by a' coiled-torque spring to connected at one end to lever 36 and at the other end to a fixed anchor pin 32 seated in a side wall of housin 3 5. Suflioient torque must be provided, in addition to that required to overcome the efiect of air how in the induc tion passage tending to close the throttle valve, to move the throttle valve in the opening direotion when the operator actuates the accelerator lever durin the time the centriiugal'mechanism of the governor is in its inefiectiveposition.

The centrifugal mechanism Ht of the governor includes weights to and 52 mounted on the long arms of hell cranks 5t and 5t, respectively, which are pivoted on pins it and it extending through the tines of bifurcated brackets 52 "an'd 64', said brackets being integrally and rigidhiljoin'edto a sleeve member t6 adapted to rotate in unison with shaft 63. The short arms of levers 54 and 56 bear against a flange iii on one end of a sleeve 72 which is adapted to rotate in unison with shaft til and to move axially thereon as weights 53: and, 52 move outwardly and inwardly with ohanges of engine speed. A flattened; portion 13 is provided on the end of shaft 58 jioroo'nnee'it ins said shaft to the power take off' E2 of the engine! Y e 3 The longitudinal movement of sleeve 12 is transmitted to lever 86 and to the throttle valve 30 through connecting member 22, a lever I4 and a roller I6 mounted on one end of lever 86. Lever I4 is pivoted at one end on a fixed pin I8 and pivotally supports at the other end a nut 88 threaded to receive the convolutions of a main governor spring 82. The spring, acting through lever I4 and connecting member 22, is adapted to oppose the outward movement of fly-balls 5D and. 52 as they are rotated about shaft 68 in accordance with engine speed.

An adjustment means is provided to vary the rate and tension of spring 82 to obtain any desired maximum engine speed. The main governor spring 82, which is threaded into the nut 80 pivotally secured by pins 84 to a pair of arms on the free end of lever I4, is anchored at one end to a screw 86 threadedly received in a nut 88- seated on a boss 89 of the governor housing.

The spring convolutions to the left of nut 80 are ineffective and perform no function in the governing operation. In this arrangement when an adjustment is to be made, the spring rate is changed by rotating screw 86, nut 88 and spring 82 in unison, the spring thus turning in nut- 88 to increase or decrease the number of effective convolutions between said nut and screw 86, while the spring tension is adjusted by turning nut 88 relative to screw 86. A suitable locking means, such as interlocking serrations on nut 88 and boss 89 (not shown) is provided to hold screw 86 and nut 83 in their adjusted position The connecting member 22 consists of a tube 90, such as copper tubing, connected at one end to a bellows 92, abutting against a bearing 84 on sleeve I2, and connected at the other end to a bellows 96 abutting against a boss I88 on lever I4, said bellows 92 and 96 being secured to stationary plates I82 and I84 of assemblies l4 and 20, respectively. The tube and two bellows are completely filled with a hydraulic fluid and then hermetically sealed. A stem I68 may be provided in .each bellows to limit the longitudinal movement thereof and to permit the use of a relatively large bellows while keeping the volume of fluid in the system relatively small. It is thus seen that any movement of sleeve I2 to the left in response 'to the outward movement of fly balls 58 and 52 compresses bellows 92, forcing a portion of the fluid contained therein through tube 98 into bellows 96 and thereby expanding said latter bellows and urging lever I4 in the direction to close throttle valve 30. As the engine speed decreases and spring 82 contracts, lever I I4 moves to the, right, compressing bellows 96 and causing a portion of the fluid contained thereinto flow through tube 90 into bellows 92.

It is thusseen that the centrifugal weight assembly of the governor can conveniently be mounted on any suitable power take-01f drive of the engine and the governor spring and throttle control assembly can be mounted on the carburetor or governor air valve body and the two assemblies connected for operation by member22 regardless of the location of the power take-off to the throttle valve.

In the embodiment shown in Figure 3', in which like numerals are used to designate like parts, a wire H8 or the like having a very low thermal expansion, is securely anchored to the end of bellows 92 adjacent bearing 94 and extends through tube 80 to bellows 96 and is anchored to the end thereof adjacent lever 14. This wire minimizes the effect of fluid expansion resulting from tem- 4 perature changes on the operation of the governor. The operation of the modification shown in Figure 3 is otherwise the same as that shown in Figure 2. Further modifications in the present invention are possible, as will occur to those skilled in the art, for example, various relationships in the size of the two bellows may be used to obtain predetermined governing characteristics. While only two embodiments of my invention are shown herein, various other changes and arrangements of my governor may be made to suit requirements.

I claim:

1. A governor for an engine having an air valve, comprising a yieldable means for urging the air valve in the opening direction, a shaft adapted to be rotated in accordance with engine speed, a plurality of centrifuga1 weights, levers pivoted on said shaft for supporting said weight-s, a member adapted to be moved by said levers, a lever pivoted at one end and spring loaded at the other end for yieldably opposing the movement of said member by said levers, and means including a fluid chamber having a movable wall operatively connected to said member, a second fluid chamber having a movable wall operatively connected to said last mentioned lever, and a conduit connecting said chambers, whereby the motion of said member is transmitted to said last mentioned lever.

2. A governor for an engine having an air valve, comprising a yieldable means for urging the air valve in the opening direction, a shaft adapted to be rotated in accordance with engine speed, a plurality of centrifugal weights, levers pivoted on said shaft for supporting said weights, 2. member adapted to be moved by said levers, a lever pivoted at one end and spring loaded at the other for yieldably opposing the movement of said member by said levers, means including a fluid chamber having a movable wall operatively connected to said member, a second fluid chamber having a movable wall operatively connected to said last mentioned lever, a conduit connecting said chambers, and a means movable by the last mentioned lever for urging the air valve in the closing direction.

3. A governor for an engine having an induction passage with an air valve therein, comprising a yieldable means for overbalancing the air flow urging said valve towards closed posi tion, a shaft adapted to be rotated in accordance with engine speed, a plurality of centrifugal weights driven by said shaft, levers pivoted on said shaft for supporting said weights, a member mounted on said shaft adapted to be moved by said levers, a lever pivoted at one end and spring loaded at the other for yieldably opposing the movement of said levers, and means including a bellows having one end operatively connected to said member, a second bellows hav ing one end operatively connected to said last mentioned lever, a conduit connecting said bellows, and a means movable by the last mentioned lever for urging the air valve in the closing direction.

4. A governor for an engine having an induction passage with an air valve therein, comprising a yieldable means for overbalancing the air for supporting said weights, a member mounted on said shaft adapted to be moved by said levers,

a lever pivoted "at one end and pring loaded at the other for yieldably opposing the movement of said levers, means including a bellows having one end operatively connected to said member, a second bellows having one end operatively connected to said last mentioned lever, a conduit connecting said bellows, a fluid filling said bellows and conduit, a member of low thermal expansion in said conduit operatively connecting said bellows, and a means movable by the last mentioned lever for urging the air valve in the closing direction.

5. A governor for an engine comprising a centrifugal weight assembly adapted to be driven by said engine, a governor spring assembly remotely spaced from said centrifugal weight assembly and adapted to operate a control means of said engine, and a means connecting said assemblies including a liquid-filled chamber having a fluid pres- 6 sure responsive wall operatively connected to said centrifugal weight assembly, a second liquidfilled chamber having a fluid pressure responsive wall operatively connected to said spring assembly, and a liquid-filled conduit continuously connecting said chambers.

ELMER M. BIMBERG.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,112,137 Henderson Sept. 29, 1914 1,384,283 Vincent July 12, 1921 1,572,173 Wildin Feb. 9, 1926 2,109,114 Kerr Feb. 22, 1938 2,142,403 McCullough Jan. 3, 1939 2,260,576 Maybach Oct. 28, 1941 2,415,508 Mallory Feb. 11, 1947

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