US1698040A - Oscillating valve - Google Patents

Description

Jan. 8, 1929. 1,698,040

F. F. WHI TE OSCILLATING VALVE Filed Oct. 11. 1926 INVENTOR.

. s Fares Ewhi'le.

Patentedjan. 8, 1929.

- urursn STA FOREST F. 'WHITE, INDEPENDENCE, MISSOURI.

OSGILLATING VALVE.

Application filed October 11, 1926. Serial No. 140,802.

This invention relates to internal combustion engines and particularly to the valve mechanism adapted to be used therewith and has for its primary object the provision of 1 a simple, durable and efficient valve structure which utilizes an, oscillating movement to open and close the intake and exhaust ports formed in a wall which closes'one'end of the engine cylinder.

One of the primary objects ofthe instant invention is the contemplation of valve mechanism for internal combustion engines which includes a longitudinally extending shaft having cam slots formed therein, which are used to impartxoscillating movement to the valve arm carried by the valve stem.

Yet another-object of my invention is to provide a valve structure which eliminates the well known pop-pet valve, yet includes effective mechanism which has a comparatively small amount of friction space and which is adapted to move to open and close the ports of the cylinder when the conditions therein are most favorable.

Another object of this invention is to provide valve mechanism for internal combustion engines which provides a valve plate within each of themany cylinders of the engine, each of which plates are adapted to oscillate to open and close an intake and exhaust port formed in the wall of the cylinder.

, Many minor objects and specific details of construction will appear during the course of the detailed specification, referring to the accompanying drawing, in which- Figure 1 is a plan view of an ordinary internal combustion engine equipped with valve mechanism constructed in accordance with the present invention, parts being broken away for clearness;

Fig. 2 is an enlarged fragmentary vertical cross section taken on line 11-11 of Figure 1;

Fig. 3 is a detailed section taken on line IIIIII of Fig. 2, looking in the direction of the arrow;

Fig. 4 is a stretch out view of the cam slot; and

Fig. 5 is a perspective view of the valve stem and sector members, showing the same entirely removed from the operative position.

It is understood that many modifications may be made in practicing my invention and the following description is made with the preferred form in mind. 7

With reference at this time to the drawing in detail wherein the preferred form is.

shown, thenumeral 6 designates the ordinary internal combustion enginehaving thewell known crank shaft 7, cylinder 8 and piston 9. Inadapting the present invention to the internal combustion engine as shown, each of the many cylinders 8 are closed by a wall 10 which has formed therein an intake and exhaust port 12 and 13 respectively. These ports 12 and 13, one of which is formed in the upper wall of each cylinder-of the engine 6, must be sector shaped and should be disposed in the relation shown in Figures 1 and 3. .An intake and exhaust passage 14 and 15 respectively is formed in any suitable way by the engine block and head and is adapted topermitthe passage of combustible and) exhaust gases from and to the intake and exhaust manifolds 16 and 17 respectively.

Since the operation of the valve mechanism is the same for each cylinder it is deemed necessary to describe the structure and actions of but one unit of the valve mechanism, it being understood of course that any number of cylinders may be equipped with this mechanism and the entire assembly properly timed to permit of free running of the engine.

As has heretofore been stated, the upper end of each cylinder 8 is closed by the wall 10 having intake and exhaust ports 12 and 13 formed therein. To open and close these sector shaped ports, a'valve plate 18 may be provided, which is disposed within the cylinder 8 andagainst the inner side of wall 10. This valve plate 18 should be provided with a pair ofproperly positioned sector shaped members 19 which are oscillated about the axis of the cylinder to open and close the ports 12 and 13.

In the instance shown, it is necessary to po sition these sector shaped members 19 in diametrical opposite relation in order that the oscillating motion imparted thereto may open and close the ports. In this instance the intake and exhaust ports formed in wall 10 are slightly less than half the size of members 19 and an additional bearing surface 20 which tends to stabilize the moving members is formed across the outer edge of the sector shaped ports. The valve plate 18 which in cludes the two sector shaped members 19 is held in position against the under surface of wall 10 through the use of a valve stem 21 which is formed integrally with the valve plate and extends axially from the cylinder 8 to a point exteriorly of the engine block and head where it has-mounted thereon an arm 22 which is rigidly secured thereto by a pin or analogous means 23. Valve stem 21 should pass through an opening formed inthe en-,

glne head which is provided with a bushing 24 as shown in Fig. 2. To resiliently maintain the valve plate in contact with the under side of wall 10an arcuate spring 25 is provided which bears against the under side of ar 22. I

To impart the proper oscillating movement to the valve stem and plate 21 and-18 respectively, arm 22 extends radially from stem 21 and operatively engages a cam slot 26 formed by a longitudinally extending shaft 27, which is rotatably mounted in bearings 28 and which may be turned in a two to one ratio to the crank shaft of the engine through the use of a silent chain drive 29, as shown in Figure 1. A diagranimatical view of the slot 26 is shown in Fig. 4 and the position of the free end of arm 22 in slot 26 during certain periods of the cycle may be set forth as follows: 7

When'the free end of arm 22 rides along the portion 30 of slot 26 no oscillating motion v is beingimparted to the valve stem 21 and compression is taking place with both intake and exhaust ports closed, as shown in Figure *1. As the shaft 27 continues to rotate, arm

vback or oscillated around the axial line of cylinder 8 to a point where the exhaust port 13 is closed and intake port'12 is open. When the arm again reaches the portion 30 of the slot 26 which joins with portion 33, both ports have been again closed and compression is taking place." This action of the valve mechanism takes place in each cylinder and V and exhaust ports, it is understoodthat the embodiment of this invention may be varied a'nd'the degrees of all-members slightly changed without departing from the scope of the appended claim.

What I claimis new and desire to secure by Letters Patent is:

A valve mechanism for internal combustion engines comprising a wall closing one end of each cylinder, an: intake and an exhaust port formedin said wall, a pair of sector shaped valve plates disposed in each cylinder and extending diametrically opposite to each. other, valve stems supporting said plates and extending axially through said cylinder wall, an arm extending, radially from each of said stems, an arcuate recess formed 1n an upper edge of each cylinder, a rotatable cam shaft mounted in said recess adjacent to and substantially below the plane of. said cylinder wall, cam slots in said shaft, said arms engaging said slots, whereby said arms are positioned close to said cylinder head, and a leaf spring positioned on each of said stems between said arms and said cylinder head for holding said plates against said cylinder head. 1 i

In testimony whereof, I hereunto afiix my.

signature this 4th day of October, 1926.

FOREST F. WHITE.

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