US1455807A - Governor for explosive engines - Google Patents

Description

May 22, 1923. 1,455,807

N.PEDERSON GOVERNOR FOR EXPLOSIVE ENGINES Filed March 12, 1921 Chrome 21 threaded into lugs 21.

EEDEESON, TRENT, SOUTH DOTA.

GOVERNOR FOR EKPLOSIVE ENGINES.

Application filed March 12, 1921. Serial No. 451,782.

To all whom it may concern.

Be it known that I, Nnns PEDERSON, a citizen of the United States, residing .at Trent, in the county of Moody and State of South Dakota, have invented a new and useful Governor for Explosive Engines, of which the followin is a specification.

My invention re ates to speed governors for explosive engines and the object is to provide a simple and eflicient device particularly adapted for tractor engines many of which are not provided with governors of any description.

In the accompanying drawing:

Fig. 1 is a side elevation of an explosive type engine with my improved device in operative connect-ion and position, part of the engine being omitted.

Fig. 2 is a front elevation of the main working parts of my device in the hub portion of the cooling fan.

Fig. 3 is a sectional elevation on line 3-3 of Fig. 2.

Fig. 4 is an enlarged detail section as on line 44 of Fig. 1.-

Fig. 5 is an end elevation of the bell crank lpvgrs within the governor housing or fan Referring to the drawing by reference numerals, 6 designates a tractor engine of the explosive type having a fan 7 at its front end suspended in a bracket 8 forming a part of water outlet pipe 9 at the front end of water manifold 10 on top of cylinder head 11.

12 is a as intake manifold of hollow construction iaving the usual mixin chamber 13 with hot air inlet 14, fuel inta e 15, and butterfly valve 16,. all within the vertical center portion '12" of the manifold with the valve arranged so as to regulate the amount of gas mixture to be drawn into the cylinders of the engine.

My device is designed to operate on the lever 17 fixed on shaft 18 of the butterfly valve 16, and this I accomplish by the following construction.

The main working parts of the governor are inclosed in a hollow cylindrical housing 19 with a cover plate 20 secured with screws Said housing is used as the hub of the cooling fan, the wings or fan blades 22 being secured to its periphery at properly spaced points. The housing 19 is secured as with screws 23 to the outer end of the fan pulley 24, which rotateson a stationary shaft 25, held in a holder 26 which in turn is held in bracket 8 or other stationary part of the engine.

lVithin the housing 19 I have two op ositely disposed counterbalances or weig ts 27, 28, the former being merely a metal weight secured permanently as at 29, the latter has its small end pivotally secured at 30 to the inner wall of housing 19 and its other end made heavier as shown at 31 in Fig. 2 and held suspended by a spring 32 one end of which is attached to an eye screw 33 having its shank threaded and projecting through the flange of housing 19, the exposed outer end having a nut 34 to regulate the tension of spring 32.

An eye-bolt 35 secured to counterweight 28 near its middle has an elongated eye 35 engagedby a pin 36 (see Figs. 3 and 5) in the rear end of a small yoke-shaped bell crank lever formed of two L- shaped bars 37 and 37 and pivotally secured at 37 to . brackets 38 and 38 respectively, said brackets being secured to inner wall of housing 19 as at 39. The front end of the bell crank lever carries a roller40 rotatable on a pin 41. Said roller 40 at all times ongages the free end of a leaf spring 42 which has its other end secured at 43 on counterweight 27. A plunger rod 44 engages the side of the spring opposite the roller 40, said plunger or push rod extending centrally through the stationary shaft 25 and projecting out through the rear end of same and there coming in contact with the lower end of a lever 45 which is fulcrumed at 46 in a bracket 47 suitably secured as at 48 on the shaft 25 or on some other stationary part of the engine.

The upper arm of lever 45 is'pivotally connected to a rod 49 which is pivotally connected with its other end as at 50 (see Figs. 1 and 4) to any one of a row of holes 51 in the upright arm of a bell crank lever 52 which is pivoted at 53 to a bracket 54 socured as at 55 to a part of the engine near the gas intake manifold 12. The horizontal arm of bell crank 52 has its rear end pivoted loosely as at 56 to the upper end of a link 57 which may have a half a turn or twist and its lower end pivotally connected as at 58 to arm 17 operating the butterfly valve.

In the operation of my device it will first be understood that to get uniformity in plowing on level ground and up or own grade, uniform speed of the tractor is necessa and to get this without changing spee gears it is of course necessary to regulate engine speed which my device does in the following manner.

When the usual fuel feed control lever (not shown) near the operator has been set and the speed gears for plowingspeed are in operation and spring 32 given the desired tension, the tractor plows level ground at a certain predetermined speed and my device does not function. But when a down grad is reached the gravity of the tractor causes it to increase its speed and without a governor the engine will also increase its speed. At such time, ona tractor having my device the motor speed is automatically maintained because when engine speed increases the lower fan driving pulley 59,

which is fixed on crank shaft 59 of the engine, drives belt 60 and pulley 24 and the governor whereby weight 28 is swung outward by the centrifugal force, thereby pulling on pin 36 of bell crank 37, 3?, pushing roller 40 against leaf spring 42 which in turn pushes plunger rod 44 and thereby lever 45, the upper end of which pulls rod 49 acting on bell crank 52. The rear arm of said bell crank is raised by the aboveac tion, thereby pulling link 57 upward and turning lever 17 of the butterfly valve say as from open position 16 to semi-closed position 16 which action reduces the amount of gas drawn into the cylinders thus weakening the explosions in the cylinders and thereby reducing power of engine. When level groundis reached the springs 32 and 42 not being strained by attempted high speed of the engine restore the governor to normal operation. y

In going up grade it is ofcourse necessarv to increase the richness of the mixture and thereby the power of the engine Without increasing its speed and to accomplish this I provide an auxiliary device composed of a toothed sector 61, a lever 62 pivoted thereto and carrying a pawl 63 engaging the sector. The lever 62 is connected to the upper arm of bell crank 52 by a rod 64 and spring 65." By manipulating lever 62 it will be readily seen that the valve can be held more or less or even wide open against the action of the governor, thus permitting a rich mixture and free flow of gas into the cylinders when climbing a grade.. Having thus described my inventionwhat I claim is:

The combination ofan explosive type enginehaving a cylindrical revolving member and a rod extending centrally out of the cylinder to act upon valve controlling means of the engine, means within the cylinder for actuating said rod and comprising a leaf spring secured with one end near the inner periphery of the cylinder and extending with its other end across the inner end of the slidable rod in a slanting position ,allowing the rod to normally project partly into th cylinder, a bell crank lever mounted in the cylinder and having in one arm an antifriction roller bearing on the leaf spring, the other arm being operatively connected to a lever pivoted at one end and having at its other end a centrifugal weight, a spring resisting the swing of said weighted lever,v

and a counterbalancing weight fixed in the cylinder diametrically opposite the weighted lever.

In testimony whereof I afiix my signature.

NELS 'PEDERSON.

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