US905911A - Internal-combustion engine. - Google Patents

Description

H. M. NEER.

INTERNAL GOMBUSTION ENGINE.

APPLICATION FILED PBB.15. 1906.

905,91 1 1 Patented Dec. 8, 1908.

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HARRY M. NEER, OF COLUMBUS, OHIO.

IN TERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Application filed February 15, 1908. Serial No. 416,104l

Patented Dec. 8, 1908.

To all whom it may concern:

Be it known that I, HARRY M. NEER, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

My invention relates to the improvement of internal combustion engines and has particular relation to the improvement of valve operating mechanism for engines of this class.

The objects of my invention are to provide simple and effective means for producing at the proper moments a positive operation of the intake and exhaust valves of an internal combustion engine; to so construct my improved operating mechanism as to admit of its being located above the valves and inclosed within a lubricating oil reservoir and to produce other improvements the details of which will be more fully pointed out hereinafter. These objects I accomplish in the manner illustrated in the accompanying drawings, in which:

Figure 1 is a front elevation of a gasolene engine having my improved valve operating mechanism, showing for the sake of clearness in illustration a portion of the oil reservoir and a portion of the crank case broken away, Fig. 2 is a plan view of the same with the top of the oil reservoir removed, Fig. 3 is a view in elevation at right angles to that shown in Fig. 1, and, Fig. 4 is an enlarged transverse section on line 00a2 of Fig. 3.

Similar numerals refer to similar parts throughout the several views.

1 represents the crank case of an internal combustion engine, 2 the main shaft which is journaled in said crank case and 3 and 4 engine cylinders supported above the crank case in the usual manner. Upon the shaft 2, preferably within the crank case is carried a beveled gear wheel 5 which gears with a bevel wheel 6 on the lower end of an upright shaft 7 which rises from the crank case and the upper end of which extends through the lower side of one end of an oblong oil reservoir or box 8, the latter being suitably supported above the cylinders.

9 and 10 respectively represent the exhaust and intake valve rods of each cylinder, a portion of the exhaust valve 9 which is carried on the lower end of said exhaust valve rod, being shown in a closed position in the valve opening 11 of the cylinder 3 in Fig. 3 of the drawing. Leading upward and thence outward from this valve opening, is the usual exhaust outlet pipe arm 12. The intake valve of the cylinder 3 is indicated in dotted lines at 10 in Fig. 4 and to this intake valve leads the usual intake pipe 18, through which is conducted the charge of air and gas which is intended to be ignited in the combustion chamber or upper portion of the cylinder.

Upon the upper end of the shaft 7 and within the box 8, is carried a beveled gear wheel 14, the teeth of which mesh with those of the beveled gear wheel 15 on the end of a horizontal shaft 16 which extends within and lengthwise of the box 8. This shaft 16 is mounted insuitable bearings 17 and 18 which rise from the lower side of the box 8 and said shaft carries thereon a pinion wheel 19 for each cylinder, the pinion wheel for but one of these cylinders being shown fully herein.

Upon an upward extension of each of the bearing projections 18 and above the shaft 16 is carried a horizontal bevel gear wheel 20, the teeth of the latter engaging the teeth of the adjacent pinion 19. As shown, the upper side of each of the gear wheels 20 has formed thereon throughout three-fourths of its circumference and on its marginal portion a raised rib or cam projection 21.

Supported above each of the gear wheels 20 and centrally connected therewith is a plate or disk 22, the marginal portion of the underside of which is for one-fourth of its circumference formed with a downwardly projecting rib or cam 23, the latter being immediately above that portion of the gear wheel which is not provided with the cam projection 21. As shown in the drawing, the valve rods 9 and 10 rise within the box 8 at one side of the gear wheel 20 and each of said valve rods extends partly within a channel formed by guide lugs 24 which project from the side wall of the box 8 and in order to prevent a rotation of the valve rods, each of said rods has formed on its outer side a rearwardly projecting lug 25 which is movably fitted in the channel formed by the lugs 24. Above the lugs 24, the upper end of each of the valve rods is provided with a cap or enlarged head 26 between which and said lugs is interposed a short cushion spring 27. Each of the valve rods has projecting therefrom a pin 28 (see Fig.

4-) on the outer end portion of which is mounted a roller 29, these rollers being adapted as indicated to bear between the underside of the disk 22 and the upper side of the cam projection 21 or between the underside of the cam projection 23 of the disk 22 and the upper side of the gear wheel 20.

From the reservoir or lubricating oil box 8 lead oil conducting pipes 30, the lower ends of which respectively enter the cylinders 3 and 1. These pipes which are intended to convey oil from the box or reservoir 8 to the cylinders, may be used in conjunction with a suitable oil pump mounted in said box, but not herein shown. Upon one end of the crank shaft which is reduced as shown at 2 is carried a fan, the latter being contained within a casing 31 and from said casing leads an air conducting pipe 32 which extends upward and thence over the cylinders and which is connected with and designed to discharge air within cylinder jackets 33 which incase the upper portions of the cylinders.

Considerable difliculty has been experienced in the running of high speed engines of the class herein shown, this difiiculty arising from the fact that the intake and exhaust valves do not close or open with suflicient promptness, particularly when the engine is running at a high speed, thus resulting in an undesirable loss of power.

From the construction described, it will be understood that when either of the valve rollers 29 come into contact with and ride upon the gear wheel flange projection 21, the valve controlled by said rod will be positively forced upward to the closed position against its seat in the upper portion of the cylinder and that when said rollers or either of. them are bearing between the downwardly projecting flange 23 of the disk 22 and the upper side of the gear wheel 20, a positive opening of the valves upon said rods is assured.

It will also be understood that in the construction and arrangement of the mechanism herein described, the cam projections 23 and 21 are of such length and arrangement and the rollers of the valve rods are so spaced and arranged as to insure the opening and closing of the intake and exhaust valves at the proper moments, thus providing against a failure of these valves to operate instantly when required and preventing a loss of power through either late or premature action of the valves.

hat I claim, is:

1. In an internal combustion engine, the combination with a shaft, and means for rotating the same, a pinion carried on said shaft, a rotatably mounted gear wheel meshing with said pinion, and a cam segment 011 said gear wheel, of parallel reciprocating valve rods, projections on said valve rods, said projections adapted to bear upon the upper sides of said gear wheel and cam projection.

2. In an internal combustion engine, the combination with a crank shaft, a gear wheel thereon and piston containing engine cylinders, of a valve operating shaft mounted above the cylinders, a pinion wheel on said valve operating shaft, a gear wheel mounted above the shaft and gearing with said pinion, said gear wheel having a raised cam segment on its upper surface, a plate carried by and above said gear wheel, said plate having a cam projection on its underside, exhaust -and inlet valve rods having projections adapted to bear between said gear wheel and plate, and connections between the valve operating shaft and crank shaft for imparting rotary motion to the first named shaft.

3. In an internal combustion engine, the combination with a crank shaft and cylinders, and inlet and exhaust valves in said cylinders, of an oil containing case mounted above said cylinders, oil conducting pipes connecting said case with the cylinders, a valve operating shaft rotatably mounted in said oil case, a pinion carried on said valve controlling shaft, a gear wheel mounted above said shaft and meshing with said pinion, said gear wheel having a cam projection on its upper face, valve rods extending upward from said intake and exhaust valves and having projections adapted to bear upon the upper sides of said gear wheel and its cam projection, and a connection between the cam shaft and said valve operating shaft whereby rotary motion is imparted to the latter.

In testimony whereof I aflix my signature in presence of two witnesses.

HARRY M. NEER.

WVitnesses R. L. PHELPS, L. CARL SroUeH'roN.

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