US2287036A

US2287036A - Suction governor

Info

Publication number: US2287036A
Application number: US236395A
Authority: US
Inventors: Hufford Raymond
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-10-22
Filing date: 1938-10-22
Publication date: 1942-06-23
Anticipated expiration: 1959-06-23

Description

June 23, 1942.

R. HUI-FORD j SUCTION GOVERNOR 4 Sheets-Sheet 2 Filed Oct. 22, 1938 INVENTOR m Lm W ,rO un. A D m m June l23, 1942. v R. HUFFORD sucTIoN GOVERNOR 'Filed Oct. 22, 1938 4 Smets-Sheet 5 INVENTOR.

June 23, R HUFFORD SUCTION GOVERNOR Filed oct. 22, 1938` 4 Sheets-Sheet 4 .Ilma Idd Ell Kmwa/v BY y Patented June 23, 1942 UNITED- STATE s PATENT OFFICE sric'rloN GovEmioa i Raymond Burford, Anderson, ma. Applioation october 22,1938, serial No. 236,395 i zo claims.l (c1. 137-152) This invention relates to an automatic governor for controlling the speed of an internal combustion engine by controlling the fuel supply thereto; l

The ohiefobjeot of this invention is to pro! vide a flexible and foolproof automatic governor adapted to control the speed of an internal combustion engine by controlling the fuel supply thereto.

The .chief feature of the invention consists in. providing a governor structure capable of accomplishing the foregoing object.

Another object of the invention is to provide a governor structure which can be adjusted over a long range of engine speeds without sacrificing engine performance at any governed speed.

Another feature of -the invention is the arl rangement of the operative parts of the governor such that if an attempt be made to render the governorinoperative in the customary manner heretofore employed with previous governors, said attemptwill. be not only fruitless but will on the contrary reduce the maximum governed speed.

One outstanding characteristic of the present invention as distinguished from previous governor structures of velocity type, is the inclusion of a stem or plunger which opposes ,the closing movement of the vfuel control valve. This is thel reverse of the usual governor practice. It is 'an arrangement that makestlie instant invention' tampern-proof.

` The invention herein disclosed is illustrated as of two basic embodiments and one of these embodiments is illustrated in two sub-generic forms. Other objects and features of the invention will be set forth more fully hereinafter.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:

In the drawings, Fig. 1 is a side elevational view of a governor embodied as an adaptor for inclusion in the fuel supply to an internal combustion engine, the cover being removed'.

Fig. 2 is atop plan view thereof, a portion of the casing being broken away to show other parts in detail.

Fig. 3 is, an end elevation of the governor shown in Figs. '1 and 2 and looking toward the' right in said figures.

Fig. 4 is a view similar to Fig. 1 and of a slightly more-modiledform of the invention,

\Fig. 5 is a view similar to Fig. .2 and of the san'le form `of the invention shown in Fig. 4.

Fig. 6 is a'view similar to Fig. 4 and of the' in detail.

,Fig. 11 is side elevational view of the in-cl vention sho n in Fig. 10,'the cover portion being omitted.

same form of the invention but in another operative position.

Fig. 7 is aview similar to Fig. 3 and of the form of the invention shown in Figs. 4 to 6.

Fig. 8 is a sectional view taken on line 8 8 of A Fig. '7 and in th direction of the arrows.

'Fig. 9 is -a sectional view taken on line 9-9 of Fig. v5 and in the direction of the arrows.

Fig. 10 is a view similar' to Figs. 2 and 5 and of a second basic form of theinvention, parts of the casing4 being broken away to show other parts iFig. 12 is a view similar to Fig.' 11 butshowing the parts in another operative position, the disclosures in Figs.. 11 and 12 corresponding respectively to the disclosures in Figs. 6 and 4, re-

spectively,

Fig. 13 isa chart of valve position plotted .against opposed force or torque of .the invention with the cam adjusted for 1500, 2000 and 2500 R. P. M. control.

Fig. 14 is a chart of valve position plottedagainst vacuum in inches for an engine held to 1500, 2000 and 2500 R.' P. M.

- Fig. 15 isa chart similar to Fig. 13 of prior art devices wherein the ca'm is non-adjustable.

Fig. 16 is a plan view of an anti-friction type lever and link structure similar lto that rillustrated in Figs. 1, 4 and 6.

Fig. 17 is an elevational view of 'same similar to that disclosed in Figs. 2. and 5.

ISI)

.subject to engine suction and fuel velocity.

In offcenter or eccentric relation and extending across the passage Illa through the tubular portion I0 is a shaft .I4 which suitably supports as at I5 an elliptical valve IS.- This valve is so mounted that the long end thereof is on the upstream sidev of the shaft axis so that the valve is responsive tothe downstream owof the fuel mixture. Such a valve is knownas .an unbalanced valve. The shaftj at one end is suitably showing the parts A within the structure 24.

supported in an anti-friction structure indicated by the numeral I1, mounted in a boss I3. The

other end of the valve shaft .I4 is similarly supported as at I9 in a boss structure 26 that terminates ina plate portion 2|. Therplate portion 2| is provided with a side wall arrangement indicated generally by the numeral 22 to form a chamber 29 and the face of said wall is tapped and threaded as at 23 forcover mounting.-

Suitably secured. to one end of the wall 22 -and to the boss portion 26 as by an integral formation is a housing structure 24 provided with a cap 25 at its outer end and-suitably secured thereto as at 26. -Reference will be had more fully hereinafter tothe mechanism and arrangement of parts The platev portion 2| is suitably 'apertured as at 21 and 29 and mounted within the chamber 29 are the

members

30 and 3| which are tapped Aandthreaded, said members being secured .in the

openings

21 and 26, respectively.

Projecting outwardly from the side wall opposite the portion 24, is the portion 32. The side wall is threaded as at 3i and an adjusting screw 34 is mounted in said threaded aperture and the head portion thereof is nested v.within the cham ber 35 formed in the portion 32.

An'adjusting screw 36- suitably secures an arm `structure 31 to the support 36.` An 'adjusting screw 38 suitably secures a structure 39 to the support 3|. The structure 39 has a bearing portion 46 of any conventional form. It bears on the head'91a of thearm 31. The-member 3 9 after once being adjusted, is a statlonaryelementv insofar as governor subsequent use and operation is concerned.

Arm 31 is adjusted to the desired position by means of the bolt 34. 'I'he opposite end of the arm is apertured as at 31h and has anchored to. it one end of a spring 4|, the other end of which is suitably anchored to a. pin 42 carried by a pair of spaced links 43. -These links 43 'also carry a pivot 44 which mounts a roller 45 betweenl the links and this roller is adapted to engage the portion, face or surface 46 of desired conformation by reason of the constraint imposed by the The shape of the portion 46 is determined by the amount of sprlng resistance required from spring 4| to balance the turning eii'o'rt o f the valvel -I6 lessthe amount of the opposing effort of the power. piston operatively associated therewith, as hereinafter set-forth. Generally vthis surface 46 is shaped to' change `the direction of ltravel of the link structure 43.as the arm 41 through the roller 59 is tilted land this action accelerates the extension of the spring 4I the desired and predetermined amount, determinable by the formationof the surface 46. As illustrated the effective surface 46 is of modified sine character and hence is termed sinusoidal surface."

The two links 43 straddle the arm 41 rigid with the end of .the shaft I4 exposed within rthe chamber 29. 'I'hese links are secured to said arm as at 48. The arm 41 on the face remote from the plate 2| mounts a pivot 49 in turn supporting a roller 0.

It will be understood the surface 31a of .the arm 31 may be of any desired conformation, likewise portion 40. Adjustment of the bolt 34 thus simultaneously adjusts the position of the cam 39 and the effective anchor point for the end of the spring 4Iand. therefore, the tension of said spring. The arrangement ofthe parts is such that the governor may be adjusted so that it may be said to maintain any predetermined speed from, for example, 1,500 R. P. M. to 3,000 R. P. M. and give very satisfactoryV performance through 5 this entire range and naturally, of course, give satisfactory performance at the set speed within that range. After this adjustment is effected, the retaining screws 36 and- 33 are tightened down to maintain cam 39 and arm 31 stationary.

the sinusoidal faced member 39 may be provided without departing from the broader fea- 15 tures of the invention.

-There is formed within the body extension 24 a cylinder 5| in which is mounted a piston 52, the stem 53 of which constitutes a plunger. This stem has its end slidably supported in the. aperture 53a formed in the wall 22 of the casing of tion 54 and encircling the plunger stem is a coil `spring 55, the piston bearing end thereof being seated within the skirt portion, the opposite end tured, the same "being, a continuation of the aperture 53a. As shown in Figs. 1 and 2, the

wall 5Ia may have. an externally threaded sleeve so that the force of thespring 55 may be 'adjusted to that desired or required.

An extension 56 on the piston constitutes a stop. If desired the end thereof may support a cushion member 51 for cushioning cap contact. This eliminates noise and that would bethe sole Apurpose of such an addition. The extension 56,

however, Idoes normally space the piston4 from the cap 25 when the piston is in its extreme right hand position. 'I'hisforms a chamber on the right hand side of ,the piston with which the 'passage 59 communicates. Another passage 59 451s an extension and communicates as at'60 with the fuel passage Illa-see Fig. 1--the passages and ports 56, 59 and 60 vconstituting -the'pow'er see Fig. l and Fig. 3-that opens upon the left hand wall of the cylinder 5I and thereby subjects the piston 52 to the force of vacuum below vthe valve I6. Chamber 29 is provided with a cover 63 and is sealed by gasket 29a and the same.

are secured to the face of the side walls 22 by screws 63a or the like. 'I'he resulting construction is such that one end of the piston is subjected to the pressure through conduit lila of the f downstream side of the valve I6 by means of the vacuum arrangement 6|2962.

The amount 'ofresistng effort desired to oppose the turning effort of the valve I6 through the 65 lever 41 and roller 50 by the said piston 52 or rather the plunger portion thereof, can be controlled by the area of the piston and the rate of the power spring 55 opposing the effort of the piston 52. 'Ihe outer end of the power piston 52 is subjected to the pressure on the upstream side of the valve I6 through` the passage arrangement 584-59-60. v

Piston' 52 is controlled entirely by the pressure -within the conduit Illa. 'One end is subjected vto the pressure on the downstream side of the gov- Hg to 20 aaszos to 2.5" Hg while the pressure on the downstreamv side of valve I6 will vary from approximately .5" vacuum in Hg. It is this differential of pressures that piston 52 issubjected to that assists in balancing the effort or torque on the valve I6, when the governor is in control of the engine and the carburetor throttle valve is wide open. l

However, when the carburetor valve is moved towards aY closed position, the pressure on both sides of the valve I6 becomes more evenly balanced, thus rendering piston 52 less effective.

The torque on the valve I6- has 'also been reduced but not in the same proportions as that on the piston 52 so it is still impossible to exceed y the predetermined governor speedjby manipulation of the carburetor throttle or choke.

It is to be observed the offset or unbalanced valve I6 is eccentrically mounted in the conduit |a so that it is responsive to fuel mixture flow' and tends to move by reason thereof into a 'closing direction.

Reference will be had to Figs. 4 to 9, inclusive,

- wherein a similarly but more complicated form of thev invention is illustrated. In said figures, numerals of the .|00 series similar to numerals previously utilized in the primary series, designate parts vin this modification identical to or similar to parts designated by the primary series in Figs. 1 to 3, inclusive. In view of the marked similarity of the two forms of the invention, it is believed a description of the major portion of the invention shown in Figs. 4 to '7 is unneces- The amount of resisting effort desired to oppose turning effort of the valve IIS through the lever |41 and roller |50 by'reason of the engagement of the plungercarried by the 'piston |52, can be controlled' by the .areaofisaid piston and the rate of the power piston spring |55 opposing the effort of the power piston |52. The outer end of the power piston |52 is subjected to at- .mospheric pressure through the port |11 controlled by the valve portion of the auxiliary piston I1I. The auxiliary piston |1| is subject -to the pressure on the upstream side of the valve ||5 through the orifice or port |80, on one end to the atmospheric pressure through the port |1| on the other end.

The parts are in the position as shown in Fig. 4 when the carburetor valve-not ,shown-K-is in a wide open position and the governor is in charge of the engine, but when the carburetor valve-not shown-is moved toward the closed position and the pressure in the conduit |I0a on `the upstream side of the valve |I6 has reached the predetermined amount to overcome the resistance of the auxiliary spring |13, the auxiliary piston |1| is moved to the position shown in Fig.

sary. The showing, however, herein does show the parts with the valve--see Fig. 6-in what might be said to correspond to almost full open position. To this extent, Fig. 6 also is representative of the position parts vof the invention shown in Figs. 1 to 3, inclusive, will assume when in that position. The present form of the invention, however, includes an auxiliary piston arrangement, to which reference vwillnow be had.

In the present form of the invention the body portion I 24 includes another cylinder |10 and mounted therein is an auxiliary rpiston |1| suiti ably recessed as at |12-see Fig. 8-to receive an auxiliary springg|13 which bears against one effective face of the piston and one effective face of the cylinder and normally constrains the auxiliary piston to the 'rightsee Fig. 8. The piston` has a stem portion |14 which mounts a valve member |15. Themain power cylinder |5| includes a port |16 that provides communication 8 closing the atmospheric p ort |11 making the effort of the power piston |52`negative as it tends to oppose the closing effort of thevalve IIS through the lever |41 and the roller |50. This is to compensate for the decrease in the turning effort of the valve IIB due to the change in y thepressure and direction of the fuel mixture rn the conduit ||0a on the upstream side of the valve ||6 `caused bymoving Vthe carburetor valve--g-not shown-away from a full open position to a partially closed position. Without y some compensating device, the selected set speed between the cylinder |10 and cylinder |5|. There is provided a passage |11'between the cylinder |10 and the exterior of the housing-portion |24.

This vents the auxiliary cylinder to the atmosphere. 'I'he size and force of the spring |13 may be as desired or required.

An adjustable member |1|a is provided for adjusting the spring tension. This is similar to the adjustment |5|a for the tension of the power spring |55. In this form of the invention, one end of the power piston |52 is subject to pressure in the conduit ||0a and on the downstream side of the valve |I6 by means of the port |6'I vand |62, these communicating by way of the chamber |29 closed by the cover |63 and sealed by the gasket |29a, the same being secured to the face of the wall |22 by bolts |6311, or the like.

or' predetermined governor speed could be exceeded by securing a proper positioning of the carburetor valve.

The piston |52, therefore, is responsive'to differential pressure within the Iconduit, ||0a and the atmospheric pressureand said piston is var.- ranged to oppose the closing effort of the valve IIB through the means shown herein so as to.

make thesame effective over all' or any part of the working range of the governor to `assist in straightening out the force line as produced by the valve I I6 and to reduce the governor speed if the force of this power piston |52 is reduced or made negative by closing the atmospheric vent orbleed |11, this power piston as previously-stated, is subject to pressure within the'conduit II-0a`on the downstream side of the governor valve and is also subject to atmospheric pressure.

The auxiliary piston |1| is subject tothe pres--l sure within the conduit II 0a on the upstream side of the governor valve and is subjected also to atmospheric pressure, As previously stated, theforce ofthis auxiliary piston is opposed by the calibrated spring |13, calibrated to hold thisA auxiliary piston in place until a predetermined vacuum or atmospheric pressure has been reached, which generally is just above thek full` a primary or 100 series.

- anchorage.

tension 224 in which is mounted the power piston cylinder communicates with means of the opening 253 and thus is subject`to load governorspeed and when the carburetor throttle is in a wide open position and when the governor valve I i8 is in full control ofthe engine.

When the carburetor throttle .valve-not shownis moved toward a closed position. the

- the pressure at that point. The opposite face of the piston is subject to pressure of the fuel passage 2I0a by means of the

ports

258, 259 and 260.

on the governor valve i has been reduced, duc v to the change in direction of ow and lowering of the pressure above or on the upstream side of the governor valve i I6.

In Figs, l0 to 12, inclusiveythere is illustrated a second basic embodiment of the invention. Nu-

merals of the 200 series wherever possible, are

employed to designate parts similar or identical to parts similarly designated by numerals of the Herein the invention is diierent, broadly speaking, in the following respects:

The specic type of anchorage for the sinusoidal faced member 239 is different. Likewise the specic shape of the sinusoidal surface thereof differs from that shown at 45 and |48 in Figs. l and 8, respectively, being less acute. The link 'connected spring is differently anchored to its support. 'Ihe link is sequentially connected to the power piston as distinguished from the pres-- sure type contact previously described. The valve means is directly associated with said linkage the end of the body portion is of a different form,

and furthermore, the so-called power spring is omitted. The, points of similarity will be obvious from an inspection of said figures, and in this respect also this form of the invention is similar to the simpler type shown in Figs 1 to 3, inclusive, as distinguished from the form of the invention shown in Figs. 4 to 9, inclusive.

In this form of the invention, the spring anchoring member 231 is supported as at 23| by the eccentrically positioned member 236. This has a surface 23Ia engaged by the tail portion 240 of the cam member 239 mounted within the mountsthe roller 245 having sinusoidal surface engagement and one end of the link structure mounts the pin 242 connected to one end of the spring 24|, the other end being connected as at 231b, the member 231 secured in adjusted position by the bolt 234 which extends through the threaded aperture 233 in the side wall 222 and.

connected as at 2 I2, are provided with the openings 2|3 therethrough for usual adaptor type The body portion includes the ex- 252. The end of the cylinder 25| which receives said power piston, is closed by the press fitted. dise 225.

The towerpiston is provided with a connecting rod 285 connected thereto as at 252a. The the passage 2I0a by Positioned in the passage 2I0a is a partition 286 that extends longitudinally of thesame, and the same is suitably slotted as at281 to permit movement of link 288 therein. The link 288 is pivotally connected as at 289 to the bracket 290 also pivotally connected to the other end of the connecting rod 285 and said bracket is'suitably secured as at 29| to a metallic resilient spring type vent or valve 292 suitably secured as at 293 to the lower end of the partition 286.'

Another fvalve 294 of similar character, is similarly secured at its lower end as at 295 to the adjacent wall of the passage 2|0a and near its upper end mounts a bracket 298 which at 291 is pivotally connected to the other end of the link 288 and-is connectedalso to one end of a link 298. The other end of said link 298 is pivotally connected at 299 to the link 243. In this instance, the resistance of the spring type valves cooperates with the other forces so that substantially the same result or broad typeof operation is obtained with this type of governor as is obtained with the other generic type of governor represented by the two sub-generic forms illustrated in Figs. 1 to 3 and 4 to 9, inclusive.

In this third form of the invention, the sinusoidal faced member 239 includes a spring anchorage 282 which is a portion of the wall 22| and forming with a suitable gasket and cover structure, the latter being secured thereto by bolts or the like, applied to the tapped holes 223 for form ing a closed and sealed chamber.

Wall 22| includes an eye anchor portion 282 which anchors one end of spring 283, the other end thereof being anchored as at 284 to the cam member 239. Th'e sinusoidal faced vmember thus f chamber 229 as at 238.- *I'he link structure 243 v is always constrained into contact with the adjustable construction 23I-236. In certain instances, if support 238 for member 239 is not of clamping character, closing movement of roller 245 will endeavor to tilt the member 239 which then will be opposed by the spring *283.

The instant form of the invention differs from that previously described in that instead of using a valve supported by a shaft associated with anti-friction means to keep friction within reasonable limits for satisfactory performance incident to operation due to the small turning effort produced by the offset or balanced valve means, the present valve means consists of two pieces of spring steel 292 and`294 as previously described and mounted and connected as described.

A relatively short movement of the linkage will close the conduit 2I9a. The stress on the valve means accordingly is relatively low and well within the elastic limits thereof. The .arrangement is essentially a relatively frictionless control for the fuel now. The valve means inherently includes a yielding arrangement so that the device is more sensitive or responsive to the varying pressures over any one predetermined portion of its travel than the last or remaining portion.

The valve construction can be so constructed remaining portion of its travel, with spring means to resist the closing effort of the valve means to any predetermined amount over its entire range of travel.

Reference will now be had to Figs. 13 to l5,

' and the high speed curve .of nonadjustable prior art devices speed.

inclusive. Fig. 13 is a chart of three curves of one form of the invention. Curve A is for,.1,500 R.. P. M., Curve B for 2,000 R. P.M. and Curve C is for 2,500 R..l P. M. Fig. 14 is a chart of three curves of the same engine at the three governed speeds for corresponding valve positions, the other-coordinate being the corresponding vacuum in inches of mercury. These curves are double lettered. From a comparison it is noted the low speed curve at small degree valve positioning .has a marked sag from the points between and 30 degrees. This sag is less pronounced in the intermediate speed curve and is very slight in the highest speed curve. In other words, the invention curves may be said to substantially correspond to the vacuum curves for the samespeeds. This means the invention is approximately isochronous with the engine.

Comparison of curves on chart, Fig. 15, with curves on chart, Fig. 14, shows that the same do not correspondingly conform. The low speed curve AAA does not sag as much as curve AA CCC sags more than curve CC. The same may also be said as to curve BBB relative to curve BB. So that these curves are quite different from the vacuum curves for the same speeds and valve position.

i As. illustrated in Fig. 15, curvev is Aunmodified vertically for each governed speed. As shown in Fig. 14, the force required to oppose the engine vacuum 'at different speeds varies for different valve positionings and the corresponding curves are not substantially the same curve correspondingly shifted but, are curves progressively flattened from low to high Chart Fig. 13` also is of the latter character. These cur/es visually demonstrate that the presentadjustable cam invention more lclosely corresponds to the engine vacuum-corresponding speed condition curves for like valvepositionings.

In other Words, in prior art devices it is required to employ different cams for different engine speeds,` whereas with the present invention one relatively stationary sinusoidal surfaced member can properly function for substantially all engine speeds. In the prior art devices the cams are designed to extend the spring or increase the resistance a given amount for each degree of valve movement and this ratio is maintained at all engine speeds as the speed is raised or lowered by adjusting the spring only.

Thevfunction of the ber lin this invention is different for different engine speeds as the ratio of acceleration of the spring to degree of valve movement is changed as the sinusoidal surfaced member position is changed with th'e spring adjustment to secure dierent engine speeds to more nearly conform to the resisting effort or force curves desired to secure satisfactory performance at various speeds with the same mechanical set-up or specification.

These charts and the foregoing description re1- ative thereto is set forth for the benefit of those not especially highly skilled in this art, since the advantages of the spring the present invention will not be-so readily apparent to those last mentioned.

In order to increase the efficiency of the govvernor the parts may be anti-frictionally connected asillustrated in Figs. 16 to 19. r Thus maximum power can be obtained from the piston at widev open position of the control valve means.

In these figures numerals of the four hundred Q acter.

accelerating means in series indicate parts identical or similar to parts illustrated in Figs. 1 and 2 and indicated therein by corresponding numerals of the primary series.

In these figures the sinusoidal surfaced member engaging roller 445 is shown carried by T- shaped links 443` which at one end straddle the lever arm 441 and are con'nected thereto as at 448. Such connection is of anti-friction characthe .prior art,v basic sinusoidal surfaced memter, as broadly indicated in Fig. 19. It is similar to the anti-friction connection indicated at 444a in Fig. 16. Member 444 formsvthe vlink connection and sinusoidal surfaced member engaging roller pivot. The other ends of the links 443 are connected by member 442 which constitutes the spring anchorage.

The lever 441 herein, however, includes a slot 4I48L to receive a correspondingly formed end of shaft 4I4. as at 441b anda counterweight 441% which may be adjustably weighted, is securedthereto asv at 44101. Arm 441 may include stop portion 4413.

This limits the arm travel in the counter-clockwise direction, see Fig.- 16, by engaging the lower link 443.

by Washers 449b which cover central aperture' 450a in roller 450.` Between the roll-er and sleeve and the Washers are the anti-friction balls 450i.

The several forms of the invention previously described may be similarly constructed without departing from the broad features of the invention. Fig. 16, however, does illustrate an arm which by experiment soA far has been determined to give most satisfactory results. If the longitudinal axis ofl slot 414 be extended and radii be projected through the slot center and the axes of 448 and 449, it has been found that if 448 lies approximately 421/2 from the longitudinal axis described and 449 lies approximately 45 therefrom in the opposite direction, best results` will be obtained. This `manufacturing Adata is supplied for completeness of disclosure.

While the invention has been illustrated and described in great detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in char- 'The several modifications described herein as well as others which will readily suggest themselves .to ypersons skilled in this art, all are considered to be within the broad scope of the invention, reference being had to the appended claims.

The invention claimed is:

1. A governor for internal combustion engines including fuel supply passage means; eccentri-l ized by the addition of an adjustame support for the sinusoidal surfaced member and an adjustable anchorage for the springmeans, said sinu- I* soidal surfaced member and anchorage having cooperating engagement, and a single means for simultaneously adjusting the sinusoidal surfaced Herein the arm 441 is extended f means operation, said link means being connected thereto and the piston having operative connection with said arm, and by the addition of means normally constraining the piston toward a position corresponding to closed valve position.

6. A governor as defined by -elaim 1 characterized by the addition of a lever arm for valve means operation, said link means being con,-

-nected thereto and the piston having operative connection with said arm, and means .normally constraining the piston toward a position corresponding to closed valve position, an adjustable support for the sinusoidal surfaced member and an adjustable anchorage for the spring means,

said sinusoidal surfaced member and anchorage having cooperating engagement, and a single means for simultaneously adjusting the sinusoidal surfaced member position and the spring means initial tension.

7. A governor as defined'by claim l characterized by the addition of a lever arm for valve means operation, said link means being connected thereto and the piston having operative connection with said arm, and means normally constraining the piston toward a position corresponding to closed valve position, and a roller therewith, an operating roller carriedthereby, a link structure having one end pivoted thereto and having a yielding opposite connection, a follower pivotally supported by the arm, and a i link engageable stop carried by the arm.

13. In a -governor structure, the combination of `a suction responsive valve shaft, an arm rigid l therewith, an operating roller carried thereby, a

link structure having one end pivoted thereto and having a yielding opposite connection, a follower pivotally supported by the arm, and approximately 871/2 from the operating roller connection thereto, and a link engageable stop carried by the arm.

14. In a governor for internal combustion engines and the like, the combination with a fuel supply passage therethrough, valve means in the passage and movable toward closed position by fluid flow operating ldirectly thereon, spring means normally constraining the valve means to- Ward open position, a connection between the spring means and the valve means, and a passage differential pressure'operable piston operatively associated with the valve means and normally constraining the valve means toward open position.

15. In a fluid operable governor forlinternal combustion engines, a housing structure including a fuel passage therethrough, and a control valve therein and movable toward closed position by fluid flow operating directly thereon, means carried by the arm and engaged by the piston.

8. In a governor for internal combustion engines and the like, the combination with a fuel supply passage therethrough, valve means in the passage and spring means normally constraining the valve means toward open position, of a stationary sinusoidal surfaced member, a follower operatively connected to the valve means, the movement of the follower being controlled by the stationary member and spring means, said follower being constrained by the spring means into sinusoidal surface engagement, and a passage suction operable piston operatively associated with the valve means.

r9. A governor as dene'd byclaim 8 characterized by the addition of an adjustable anchorage for the spring means, an adjustable support for the sinusoidal surface member, and a single means for simultaneously and conjointly adjusting the spring tension, the spring position and the operative position of the sinusoidal surface member.

10. A governor as defined by claim 8, charac.- terized by the addition of an auxiliary piston and cylinder for first mentioned piston control.

11. In a governor structure, the combination of a suction responsive valve shaft,-an arm rigid therewith, an operating roller carried thereby, a link structure having one end pivoted thereto and having a yielding opposite connection, and a follower pivotally supported .by the arm, and approximately 871/2 from the operating roller connection thereto.

v12. In a governor structure, the combination of a suction responsive valve shaft, an yarm rigid connected to the valve for valve operation, other means responsive to fluid pressures upon opposite sides of the valve, 'and cooperating with the first mentioned means for valve control, and two passage forming means formed entirely within the housing structure providing communication between the fuel passage at opposite sides of the valve and the second mentioned 'means whereby.

the fluid medium operative upon the second mentioned means` is no dirtier than that in the fuel passage.

16. In a fluid operating governor for an interna] combustion engine provided with a fuel conduit and valve means adapted to control the flow of fluid fuel in said conduit and movable toward closed position by fluid flow operating directly thereon, the combination o f means responsive to pressure within said conduit, and means forming independent-passages communicating with said conduit to control said pressure responsive means, one of vsaid passages being subject to the pressure on the'engine side of said valve means and one ofsaid passages being subject to the pressure -on the atmospheric side of said valve means to supply said passage forming means with clean air to control the fuel supply that is passing through said governor conduit.

17. In a differential pressure governor for an internal combustion engine having a. throttle, the combination with an-intake,an unbalanced governor valve therein always constrained toward open valve position, of a pressure responsive means -responsive to the differential eflect of the suction in the intake at opposite sides of the valve and normally constraining 'said valve toward open position at all times, said means being arranged for diminishing its constraint upon said valve in accordance with closing'movement of the throttle ,from the wide open position.

18. A governor as defined by claim 17, characterized by the differential pressure responsive means having opposite faces subject to different pressures. v

19. A governor as defined by claim 17, charthe combination with an intake, 'an unbalanced.

governor valve therein always constrained toward openv valve position, of a' pressure responsive means responsive to the differential eect of the suction in the intake at opposite sides of the valve and normally constraining said valve toward openposition at all times, said means being arranged for diminishing its constraint upon said valve in accordance with closing movement of the throttle from the wide open position, the governor valve in closing having an increasing torque incident lto fuel flow in the intake, and said ypressure reaA sponsive means having a corresponding increas.

ing compensating effectincident to the corresponding differential pressure change due to the movement of the governor valve toward 'closing 10 position.

RAYMOND HUFFORD.