US1764255A - Internal-combustion engine valve and valve gear - Google Patents

Description

C. H. M. FRY

June 17, 1930.

Filed Aug. 5, 1926 m wfl W1 W w 2:: W p. m 3 Q \\x J m ww Patented June 17, 1930 UNITED 1 STATES PATENT, OFFICE 1' CHARLES HENRY MONROE FRY, OF POINT PLEASANT, WEST VIRGINA INTERNAL-COMBUSTION ENGINE VALVE AND VALVE GEAR Application filed August a, 1926. Serial No. 126,811.

This invention relates to internal combustion engines and more especially to internal combustion engine valves and valve gear.

It is the purpose of this mvention' to pro- 5 vide certam improvements 1n form and in operation for valves and valve gear particularly suited to internal combustion engines and especially adapted for use with apparatus similar to that disclosed in my co-pending application entitled -Charging devices, Serial Number 1,116,125, filed June th, 1926.

It is an object of the herein disclosed invention to provide an approvedform of engine valve affording certain improvements The poppet valve has been perhaps the most widely used type of valve for internal combustion engines and has had as its para- 3 mount characteristic simplicity, however, efficiency now becoming essential as well as mere ability to operate, such valves, lacking as they do any provision for tightness of closure under varying temperature condi- I tions for any variationof cut-off and requiring high lift to obtain required port opening, no longer provide all of the requirements dictated by progress. It is the purpose of this invention to provide a valve combining the desirable features of the pop pet type valve and those of certain other valve types, while still maintaining a simple structure capable of continuous operation and low enough in cost to be universally used without substantial changes in engine design indicated as preferable by several years experience. It is also a part of this invention to provide gear capable of operating engine valves of the character set forth and of incol'porating in this gear meanswhereby the cut-off and'opening ofthe said valve may be adjustedeither automatically or manually.

That the detail means of accomplishing my invention-and that certain further improvements, maybe manifest reference is made to the accompanying drawing which serves to show a preferred embodiment of my invention.

Fig. 1, is an elevation of a portion of an internal combustion engine having my valve and valve gear embodiment applied thereto; it being understood that a substantial portion of the engine proper is broken away and that certain mechanism parts and covers are either omitted in full or only indicated in fragmentary form that the clarity of description pertaining to this invention may be furthered. 1

' Fig. 2, is a vertical cross sectional view of my improved valve as applied to the engine; the portions of the engines shown and the valve seat being in cross section while the valve itself is shown in full elevation.

Fig. 3, shows a detail of the mechanism H shown in Fig. 1, and is taken upon line 3- of Fig. 1.'

Referring .to the drawings; the engine block 10 is provided with the cylinder inlet 7 port 12 opening to the engine cylinder whose wall 14 may be seen in Fig. 2, port 12 preferably extends upward to communicate with the engine manifold 16 and provides a seating for the valve sleeve 18 which maybe removable for replacement or which may form an integral part of the cylinder casting. Sleeve 18 is substantially tubular inform and is provided with ports 20 slightly above its lower edge. Within this sleeve 18, slides the valve 22 whichcomprises a head 24, a ring valve portion 26,'and a valve stem 28,

which .fls erves'to space and operate the other parts, extending downward as indicated in Fig. 1 to a block 80, having guidelfins 31 Slid ing in guides 32 formed in the cylinder casting. Block 30 serves to mount a roller 3 1, riding upon cam 40, and held in contact therewith by such means as the usual valve spring 28 Cam 10 is secured to camshaft 12 which also mountsjspiral gear 4 1 engag ing gear 45J'which is driven through such means as shaft 46 from the engine crank shaft or the like.

Cam shaft 42, also extends through a suitable opening in the engine casting 11 and is grooved as at 42 to engage the extremity of a shifter lever 50 keyed to shaft 52 which may extend to the engine governor or to a convenient place for manual operation'in a manner similar to the mechanism well known to the art for engine control purposes. It will be noted that spiral gear 44 issubstjantially longer than gear 45 and it will be seen that endwise shifting of cam shaft 42 by lever will change the relative aiiigular position of cam 20, in reference to the engine cranks. It will be noted that cam 40 is elongated to provide bearing for the valve roller 34 regardless of the endwise position of the cam shaft 1-2. The motion of valve stem 28 is of course up and downin a vertical plane and to take the backward and forward thrust of roller 34 the fins31 and the guides 32, have been provided as previously described thus eliminating much of the wear and tendency to become out of round previously unavoidable in the valve stem bushings 29, in designs previously used so that valve stem 28, always rises and falls in a truly vertical plane and the valve 22, is always truly central with the axis of sleeve 18, wherein valve ring 26 slides. Valve ring 26, is of course joined to valve stem 28 through the medium of webs similar to those indicated in dotted lines in Fig. 2 at 27, and the gas flow is through this ring and substantially parallel to the valve stem when the valve is open. This condition is indicated in Fig. 2, wherein the arrows indicate the lines of gas flow. It will be understood that when the valve is closed (when cam 40 is turned downward by shaft 42) the valve ring 26 closes ports 20 while valve head 24 closes the upper end of sleeve 18. It will of'course be manifest that head 24 may slide into sleeve 18, or may seat upon the upper surface thereof, through simple modification of construction.

eration will be unnecessary in that those skilled in the art will understand that the the other extremity of the said stem and a valve sleeve inserted in the engine block providing a bearing for one of the aforesaid stem guide means and providing a seat for the aforesaid head engaging the outer periphery of said head when the valve is closed, said sleeve having ports substantially adjacent to discharge end and increasing the discharge thereof.

2. In an internal combustion engine, an engine block having a passageway therein, a valve sleeve with open ends in said passageway and having-a plurality of ports adjacent one of its ends, a valve stem mounted for reciprocation in p the block and extending through said sleeve, a valve head mounted on one extremity of said stem and adapted to close one end of the sleeve whenthe head is in one position, a ring guide fixed to the stem and slid'able in the sleeve, guide means on the 2 other extremity of said stem coasting with the ring guide to keep the stem in straight line while moving, and means for reciprocating said stem.

v 3. In an internal combustion engine, an engineblock provided with a passageway, a valve sleeve with open ends in said passageway having a plurality of ports near its lower end, a valve stem mounted for reciprocation in the engine block and extending through said sleeve, a valve head mounted on the upper extremity of said stem and adapted to close the upper endof the sleeve when the 7 head is in one position, a ring guide fixed on the stem below said head and slidably engaging the sleeve, guide means on the lower extremity of said stem for rectilinearly guiding" the stem, and means for reciprocating saidstem.

Signed at Point Pleasant, W. Virginia, this 27th dayof July, 1926.

CHARLES HENRY MONROE FRY.

- It is thought that further description of op- 20 and of sleeve 18, may be changed in the cycle by a relative movement between the spiral gears after the manner pre'viouslydescribed.

Manifestly, many changes and modific'ations in the embodiment ofmy invention may be made and certain parts thereof used with- V out employment of certain other parts to ace complish beneficial results all within the scope of my invention and within the spirit of the appended claims.

WVhat I claim is y 1. In an internal combustion engine valve and gear, a. valve comprising a valve head mounted on avalve stem having guide means substantially ad a'cent sa d valve head and

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