US1348831A

US1348831A - Speed-limiting device

Info

Publication number: US1348831A
Application number: US316901A
Authority: US
Inventors: Edward G Hodges
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-08-11
Filing date: 1919-08-11
Publication date: 1920-08-03
Anticipated expiration: 1937-08-03

Description

E. G. HODGES.

SPEED LIMITING DEVICE.

APPLICATION FILED Aue.II. 1919.

Patented Aug. 3, 1920 wnws'ss Jim/ENTER.

5, Ja a w/ 133 Q QQM Ams UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Aug. 3, 1920.

Application filed August 11, 1919. Serial No. 816,901.

To all whom it may concern:

Be it known that I, EnwARn Honons, a citizen of the United States, and a resident of Marshalltown in the county of Marshall and State of. Iowa, have invented a certain new and useful Speed-Limiting Device, of which the following is a specification.

My invention relates to speed limiting devices for internal combustion engines of the type in which there is no obstruction to the ordinary flow of fuel mixture to theengine cylinders.

The object of my invention is to provide such a speed limiting device of very simple and inexpensive construction, having means operatively connected with a moving part of an engine or piece of machinery, and so arranged that when a certain predetermined speed has been reached a valve will be 0perated for admitting a free flow or intake of air in addition to the normal air supply to the fuel mixture passage, for thereby thinning the fuel mixture to such an extent as to immediately reduce the speed and hold it down to the desired limit. 1

A further object is to provide such a device so constructed and arranged as to permit a considerable variety of rates of speed before the device becomes operative, and witheut affecting the ordinary fuel mixture su y.

till a further object is to provide mechanism operatively connected with the means hereinbefore described for automatically shutting off or reducing the fuel supply when the speed has reached a certain predetermined point.

With these and other objects in view my invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which;

Figure 1'shows a side elevation of a speed limitlng device, 'my invention.

Fig. 2 shows a horizontal, sectional view taken on the line 22 of Fig. 1; and

Fig. 3 shows a vertical, sectional view taken on the line 3-3 of Fig. 1.

In the accompanying drawings I ha e shown a part of the upper fuel mlxture passage or chamber of a carbureter indicated annular flanges partly in section embodying by the reference character- 10. Above the carbureter part 10 is a fuel mixture passage 11, designed to be suitably connected with the mtalge manifold of an internal combustion engme. 1

Inthe carbureter is a fuel-nozzle 12. Communlcatmg with the fuel mixture passage 11 is an air supply pipe 13. In the carbureter portion 10 is an ordinary manually controlled throttle of the butterfly type 14.

Suitably mounted is a governor conslsting of a roatable shaft 15, having fixed thereon a collar 16. Slidably mounted on the shaft 16 is a sleeve 17 having at its

opposite end

18 and 19.

Pivoted to the collar 16 are governor arms 20. Plvoted to theflange 18 of the sleeve 17 are governor arms 21. The

respective arms

20 and 21 are connected with governor balls'22. The shaft 15 is operatively connected by means of a flexible shaft 23' or other suitable mechanism with a moving part of an engine or other piece of machinery, whereby the be operated accordin'gto the speed of Sue moving parts.

On" the shaft 15 between the collar 16 and the flange 18 of the sleeve 17, is a coil spring 23 which yieldingly tends to hold said parts apart, and to hold the balls 22 in close proximity to the shaft 15.

Suitably mounted in the pipe 13 is a butterfly valve 24 having a stem 25 extended through the wall of said pipe, and is provided on its outer arm with an arm 26.

Pivotally mounted on the stub 27 isa lever 28 having near one end an elongated slot 29, which slidably receives a pin 30 on the arm 26.

At the other end of the lever 28 is an upwardly extending arm 31, having at its upper end a ri ht-angled extension 32 terminating in for ed arms 33, which receive between them the sleeve 17. When the parts are in their normal position and are moperative, the valve 24 is held in closed position by the spring 34 mounted on the stub 27 and fixed at one end. The other end of the spring 34 is connected with the lever 28 and t c said spring is so arranged as to ten to hold the lever 28 in position for holding the valve 24 closed when there is no tension on said spring 34. I

In addition to the parts already described I preferably provide an extension 35 on the stem 25. On the extension 35 is a governor device mag tion 10.

' 37 mounte part 10 and has fixed to it, on the inside ofsaid carbureter part a swln flap valve 39' arranged ustabove the fue nozzle 12,

and adapted in one of its 'positionsto close I of my improved speed gove engine or motor vehicle on which 111 is installed, may be operated thronge the fuel nozzle 12;

. It will be understood that the shaft 38 is located off center in the carbureter por- It will be seen that in the practical use device, an device a considerable range of speed without ing affected in any way by my device.

When, however, the moving parts, to which .the shaft 23 is operatively connected,

reach a certain predetermined speed, then.

the ba1ls'22 will .slide outwardly movingthe sleeve 17 toward-the left, asillustrated'in Fig. 1. When the speed reaches a certain. po nt, the flange 19 will engage the forked arms 33 for thereby 'actuatin the extension 31, 'the' arm 32, the lever 28,. or-moving the valve 24: and admittin the passage of air a to the pipe 13 into the uelmixture passage. $0

lever 28 and the arm 26. for opening-the -.Where the fuel nozzle control .valve is used,it*will. be seen that there is simulta-- neously a movement of the valve'38 toward closing position, for thereby shuttingofi the I supply of fuel from the nozzle'12. 4 v

t will be understood that the parts of my device may be so constructed that the valve 39 will substantially shut ofi all flow of fuel from the nozzle 12 when saidvalve is closed, or will simply limit the flow of fuel are extended into the fuel mixture pasfor opening it to any desired de 1t is actuated through the'operation of the l from said nozzle 12; V

It will also be understood thatthe length and proportion of the parts may1 be so varie as to regulate the action of t e vafiv'e w en.

governor.

pamper conditions for effecting economy of I I has been as thin or lean as properly should be used for maintaining the speed under the existing road conditions, then when the valve24 is opened and an additional supply of air is admitted tothe fuel passage, the fuel mixture will be'so thinned as to reduce orkeep down the speed of the engine.

With some speed limiting devices there sages, or into the intake manifold thick obstructions, such for instance, as a' plug, or a valve whereby the carrying capacity of such fuel passages is reduced. I

These fuel passages in a well builtengineare constructed with a scientific regardfor on 'a shaft 38. -The shaft 38" 'necessa speed, the valve is partelg el,'and-that the'mixture use thenecessity of proper sized' passa es for supplying the engine cylinders w1th the and proper vo ume of'fuel mixere such an obstruction is placed ture. in the fuel passa es, .it-will be obvious that the e fiiciency of t e engine will be reduced, and 1n all probability there-"will be a loss of economy in the use ,of fuel, due to thefact that on accountof the reduction inthe size of the fuel'mixture passage it is necessary for the operator to use .a; richer mixture than would be the' case ifv such, obstruction were not in the fuel mixture passage.

Where a governor is-used in connection with a valve placed in some of'the fuelmixture passages, it sometimes occurs that even though the obstruction in'the fuel mixture is not very great when the valve is opened,

yet when the engine reaches a speed somewhat below. the predetermined maximum closed, and during the time it is intend to operate the engine at almost the maximum s eed, such operation will be interfered wit and the efliciency of the enginereduced by the obstruce tion-imthe fuel mixture passage furnished bysaid valve.

-"My.device is entirely'free from the defects just mentioned. With my device the engine can be operated very nearly to the predetermined maximum speed without .any interference whatever from my device,

or can be operatediright. at: the maximum speed with assurance of using a very lean mixture.

It will be understood that while the en- .gine is operating rightat the predetermined maximum speed, the air :yalve will be slightly 0 mod andallow an additional amount 0 air into the .,fuel mixture. As soon as the speed goes an? above the predetermined maximum s the valve will be opened further and will admit enough extra 'air' to thin the-mixture to such an extent that the s d will immediately drop back -to. thepre etermined maximum spee Assuming that the'nngine'has been running under I When'the speed of the engine is reduced,

'.the valve 24 will be moved to closed position as soon as this is permitted'by the governor,- and immediately upon the closing of der conditions favorable to fuel economy and engine efliciency without any 'obstruc-i tions in the fuel mixture passages.

- The tension of the spring 23, may be vathe valve 24 the engine can'be operated un- (Elil'fld. to operate. the governor, and fixing t e maximum speed for the engine. The "operation of my deviceis positive .and certain.

I intend to cover by my. claims any changes in the construction of my device from the particular construction shown in my drawings which may be. reasonably in chided within the scope of my invention and my claims.

I claim as my invention:

1. In a devlce of the class described; a fuel mixture passage; an air passage communicating therewith; a valve in said air passage; a governor designed to be connected with a moving part of an engine; and means for connecting said valve with Said governor for actuating said valve after the governor has reached a certain speed of movement.

2. In a device of the class described; a fuel mixture passage; an air passage communicating therewith; a valve in said air passage; a governor designed to be connected with a moving part of an engine; means for connecting said valve with said governor for opening said valve after the governor has reached a certain speed of movement; and means for normally holding said valve in a certain position of its movement.

3. In a device of the class described; a fuel mixture passage; an air intake passage communicating therewith; a valve in said second passage; means for normally holding said valve closed; a centrifugal governor including a slidably mounted sleeve; and means for connecting said valve with said sleeve, whereby said governor is permitted considerable movement without affecting said valve, and whereby when the governor reaches a certain speed said valve will be opened.

4. In a device of the class described; a

fuel mixture passage; an air intake passage communicating therewith; a valve in said second passage; means for normally holding said valve closed; a centrifugal governor including a slidably mounted sleeve; means for connecting said valve with said sleeve, whereby said governor is permitted considerable movement without affecting said valve, and whereby when the governor reaches a certain speed, said valve will be opened; a fuel nozzle in said first passage; a valve for coacting with said nozzle; and means for operatively connecting said valve with said first means.

5. In a device of the class described; a fuel mixture passage; an air intake passage communicating therewith; a valve in said second passage means for normally holding said valve closed; a centrifugal governor including a slidably mounted sleeve; means for connecting said valve with said sleeve, whereby said governor is permitted considerable movement without affecting said valve, and whereby when the governor reaches a certain speed said valve will be opened; a fuel nozzle in said passage; a throttle valve in said first passage between said fuel nozzle and said air intake passage; a valve for controlling said fuel nozzle; and means for operatively connecting said valve with said first means, whereby said last valve will be moved toward closed position when said first valve is moved toward open position.

Des Moines, Iowa, June 27, 1919.

EDWARD G. HODGES.