US1881259A - Valve for internal combustion engines - Google Patents

Description

VALVE; FOR INTERNAL COMBUSTION ENGINES Filed Dec. 16. 1929 I Ill/08771 1 Patented Oct. 4, 1932 uNirEe stares PATENT oFFIce GUSTAF BECK, O MINNEAPOLIS, MINNESOTA, ASSIGNOR OF FORTY-NINE ONE- HUIIDREDTHS TO GEORGE 0. DARROW, OF MISSION SAN JOSE, CALIFORNIA VALVE FOR INTERNAL COMBUSTION ENGINES Application filed December 16, 1828. serial No. 414,425.

This invention relates tovalve construction and especially to valves forinternalcombustion engines.

It-is an object of my invention to provide an improved valve for internal combustion engines, which will close perfectly against its seat and which will be free from carbon whereby greater compression within the cylinder is attained, resulting in greater power and more uniform operation of the engine or motor and consequently economizing in the use of fuel.

It is a further object to provide a valve for "internal combustion engines which will be or stem of the valve is displaced, tilted or oscillated will always find a perfect seat.

A further object of my invention is to provide a valve so constructed to cause the volatile fuel to be instantly admitted into the cylinder head, means being provided for guiding the volatile fuel in the shortest path of travel.

Another object is to provide valve structure wherein neither the valve head nor the seat has surfaces on which grit, dirt or carbon may lodge.

These and other objects and advantages of the invention will be fully set forth in the following description made in connection with the accompanying drawing, wherein like reference characters refer to similar parts throughout the several views and wherein,

Fig. 1 is a vertical section through a portion of an internal combustion engine, showing one of my valves applied to the fuel intake passage, said valve being in seated position;

Fig. 2 is a similar fragmentary view showing the valve in open position; and

Fig. 3 is a top plan view of the valve detached.

My valve is applied to the fuel intake passage I of an internal combustion engine, the usual detachable cylinder head H being secured to the cylinder block above the piston in the usual manner I said piston working in the cylinder C, which cylinder is surrounded by the usual water acket J.

The upper end of intake passage I terminates in a very narrow annular valve seat 5 to form a substantially line or edge contact with the valve head. The valve comprises the usual slidable stem 6 sliding freely in an elongated guide or hearing 7 which is secured in the engine block alincd with the center of valve seat 5. The lower end of valve stem 6 is adapted to be en gaged by means of the adjustable head 8a of a tappet 8, which tappet is controlled by means of a cam (not shown). An annular spring seat 9 surrounds the lower portion of valve stem 6 and is connected therewith by means of a diametric pin 10 and a washer 11, and a coiled spring 12 surrounds stem 6 and is interposed between spring seat 9 and a shoulder provided below the water jacket and adjacent the lower end of valve stem guide 7, said spring urging the valve against its seat.

Myvalve head 13 is rigidly connected with the upper end of valve stem 6 and may be, if desired, integrally formed therewith and comprises a true segment of a sphere. I prefer to use a segment of between and although this may be varied, all within the scope of the invention. The segment is of such size that the major portion thereof will be disposed below the narrow valve seat 5 and the inclined narrow seat is formed to precisely fit the contour of the spherical segment.

I prefer to recess the top of the valve head at 13a as clearly shown in Figs. 1 and 3, thereby decreasing the weight of the valve.

It has been found that valves will seat with greater certainty if the area of the seat is reduced. The common construction of valve employs a'beveled seat and a valve having a relatively wide, straight bevel which is wedged into the seat. This construction affords surfaces of considerable area on which the carbon and foreign material may lodge,

holding the valve partially open and preventing adequate compression.

With my valve, the area of the seat is extremely small and will not accumulate carbon or grit. Carbon, furthermore, will not collect or adhere to the external surface of the cone.

valve head 13, since it is asmooth spherical surface. The valve head, therefore, in its movement will not carry carbon or grit to the seat. The spherical surface of the valve head is preferably hollow.

I My valve head will 'alwaysfind a perfect seat regardless of whether the stem is bent slightly out of aline'ment or whether the guide 7 becomes loosethroughwear, due to the fact thatthe zone of the spherical head engaged by the seat will be precisely the same in shape regardless of'whether the longitudinalcenter line of the stem is tilted relative to the axis of the seat.- It will also be obvious that a slight oscillation of the valve will not effect itsperfect operation, because of the substantially edged contact of the narrow seat With the spherical head.

.In Fig.2 Where the valve is illustrated in open positionthe function of the spherical segment head in directing passage of fuel instantly, through the valve opening is shown. The gases or vaporized fuel striking thecon- 1 vex surface of the valve head is made to travel in substantially a direct path through the space between the valve and valve seat. In this connection, it will be noticed that a slightzelevation :of myjspheri'cal valve head effects an opening of considerably greater area between the valvehead and the seat than in the common type of valve extensively used atthis time, wherein the seating surface is substantially in the shape of a truncated Due to the above stated facts, when used either as an intake or exhaust valve the gases Will pass-more quickly through the valve opening insuring asmoother operation of the englne-and-economy in the consumption of fuel.

. When used as an exhaust valve, since the valve opening is greater, for apredetermined lift of' the valve, than the truncated conical valves extensively used at this time, it follows that the exhaust gases Will be expelled practically instantaneously and that danger of overheating through back pressure and exhaust gas left in the cylinder head will be greatly reduced, ifnot entirely eliminated.

If properly adjusted, my valve in the exhaust passage will effect a substantially instantaneous discharge of the gases after thefiring' stroke ofthe engine.

Will be seen that'I have invented an improved valve 'Which Will seat perfectly and be self-adjusting relative to its seat, which will be practically free from carbon and which will provide a greater'valve opening for a predeter mined lift than valves now in extensive use.

I It will, of course, be understood that various changes maybe made in the form, details, arrangement and proportions of the the valve is in closed position.

2. V In valve structure, a valve comprising a true segment of a sphere havlng a smooth spherical contacting surfac'e,.an annular valve seat having an internal circular contact edge 7 making substantially line or edge contact With said spherical surface When-the valve is in closed position and a reciprocable valve stem rigidly securedto said spherical valve and substantially axially aligned with said valve and said seat. V r In testimony whereof I aflix my signature.

GUSTAF BECK.

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