US1098455A - Internal-combustion engine. - Google Patents

Description

G. MODOWELL'.

INTERNAL COMBUSTION ENGINE. APPLIGATION PILED AUG. 1v, 1912.4

1,098,455. Pawnteduune 2, 1914,

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f lllllllllllllllillll W win/5885s /m/E Ton ATTORNEYS G. MODOWELL INTERNAL GOMBUSTION ENGINE.

ArLIoA'rIoN HLBD AUG. 17, 1912.

Patented Jungs, 1914.v

2 sanms-sn1m 2.

. INVENTR Br /w ATTORNEYS WTNESSES t,... 7H@ M Fg# anonce Menownnn INTERNAL-COMBUSTION ENGINE.

Specication of Letters Patent.

orNiew` YORK, N. Y.

` Application led August 17, 1912. Serial No. 715,567.

Y @chori/ t it may concern: Be, tknwn t-hatLI, GEORGE MoDowELL, a citien of the United States, and resident of `|th'efeityoil New York, borough of Brooklyn,

@nonni-,y (jfKingS, 4and State of New York,-

have 'invented` certain new and useful Imprp'v nts v in `Internal Combustion En gines unich -the following 1s a specificanon. i

16" LThe[object 'f my invention is to improve impli'fyhe, valve mechanism and prodiie an ,feiiici'ent device positively operated atfall times, 4without the use of springs and l henc'eg'to increase `the etficienc of ""7'tlie`eng-in'e andirender the 'operation o the valveskpracticallyjnoiseless. This I have accomplished-bysurrounding the upper end of thee l' r withftwo concentric valve rings eachf rovi with slots or openings corre- "i'spontiingfwitlifthe intake and exhaust ports ofthecylinder andadapted by rotative oscillationofthe rings, to open and close said stood thai-it may be used inother types of ngin'es for ivhicliit is found adaptable.

4o il 4th icompanying drawings, Figure 1 repi esente :ingle cylinder engine in vertical sectie" Fig. .2` shows a section of the valve f lltaleii on the line 2-201" Fig. l;

Fig. 3 shows thevalverings in elevation kand represent, ,dagrainmati-z riodically` in accordance with the- V4horinontal i secti on thereof ;,y

3 represents the cylinder in which the I{i'nlrnrri OFFICE.;

Patented June 2, '1914.

piston 4.- is adapted to reciprocate. The piston is connected to the crank 5 by the connecting rod 6 in the usual manner. The .engine cylinder is made double or is provided with a water jacket 7 in order to permit circulation of cold water about the cylinder and valve rings. The cylinder and water jacket are provided with enlarged annular extensions 3 and 7 above the end of the piston, which extensionsare bored out to receive two concentric valve rings 8 and 9. The cylinder head 10 is adapted to close the end of the extension and at its center yprojects downwardly atlO inside of the valve rings 8 and 9 to closethe end of the cylinder, thereby forming a compression chamber above the end of the piston. The cylinder head 10 is hollowed out or chalnbered at 11 for the circulation of water to keep the head and valve rings cool as desired. The head is also provided with an opening 12 for the spark plug which may be inserted in any suitable or preferred manner. wardly extending central portion of,V the head la'is preferably also provided with The .downtwo radially extending openings or ports 13 and 14, one of which, 13, is the inlet-port for the entrance oi'j the gases to the compres?v sion chamber and the other, 14, is the exhaust port for the escape ofthe burned gases after the explosion. These ports are adapted to register with corresponding openings Y der and the downwardly extending portion 10LL of the cylinder head and compression chamber and are loosely mounted thereln for tween the upper' extension 3 of the cylin.

movement oigoscillation in a circumferential direction. Each valve melnber or ring 8 and ylocated in .such a position Von the circum-` Vserve. toopen and close the ports .13 and 9 is provided with `two or more openings 'ference ofthe respective rings that they may i ilfla't the proper time duriugthe four',strokes` i as hereinafter/more fully described.- The.` l ,openings.15 and 16`in the valveA rings'are Varrauigcd t0 .be brought .into register with the..` in`let port 13 to open said inlet portfor 1k. Shaft 'thc'admission of theeiplosive mixture, and n the o enings 17 and 18 are adapted to be i broug t into register to open the exhaust bring the openings 15 and 16 and theopenings 17 and 18 into register therewith during the four strokes of movement of the piston in the manner to be hereinafter more y described. The valve rings may be reciprocated in any suitable manner to obtainy the desired results, but I have here vshown the respective valve rings as provided with` geared segments 19 and 20, the segment 19 being cast upon or secured tothe inner ring 8 while the segment 20 is simi-v larly secured to the outer ring 9. The outer -ring 9 is provided with a slotted opening at 21 to enable the ringto be slipped into place over the innerl ring, which slot is made T-shaped to provide for the reciprocation of "i so the segment 19 connected to the inner ring. Meshing with the respective segments 19 and 20 are two gear segments 22, 23 which 'are pivotally mounted on the frame of the l' engine and adaptedlto be rocked orvibrated in-any suitable manner to reciprocate the v valve rings 8 and 9. In the present instance,

these geared segments 22, 23- are mounted @upon rock shafts 24 and 25, one. of which, 24,

i's tubular andsurrounds the other, as will be seen in Fig. 1 of the drawings. The two concentric shafts 24 and 25 are inclosed and supported b a shell or casing 26which is Secured to t e engine frame or more proping from the rock arm 27 and thereby oscillate the inner valve ring 8, while the cam e'rly, to the cylinder water jacket, and to an extension of the crank yshaft housing. The lower ends of the shafts 24 and 25 are preferably provided with outwardly extend-V 1ng rock arms 27 and 28 secured to the respective shafts. Each of the rock arms 27, '28, is provide with a downwardly projecting pin or ro ler 27, 28, each of which isadapted to operate in a circular cam groove on the cam wheel 29. The cam groove 30 is adapted to operate on the pin 27il pro]ect groove 31' is adapted to operate on the pin 28a inthe rock 'arm 28 and oscillate the outer valve ring 9, as will be seenl from the drawings. The cam wheel 29 is secured to a shaft 32 which is supported suitable bearings 33 extending from the housing 1 as previously indicated. Preferably one end I of the shaft 32 is provided with a spur gear 34 which is secured thereto and adapted to mesh with another spur gear 35 secured to the crank rshaft 2, the `relation between the propel.'v

two gears 34 and' '35 being such that it requires two complete revolutions of the crank shaft 2 for one of the cam shaft 32.

It will be understood that an suitable connection between the crank sha and the cam shaft may be employed so long as the relation between the rotation of the crank' shaft and the proper opening and closing of the inlet and exhaust ports during the four strokes is maintained.

By the form of device and the relation between the parts here shown, the operation of the valve rings by the crank shaft through the circular cams at the beginning of each of the four strokes is indicated in Figs. 5 to 8 inclusive, in which the relative positioii of the crank shaft, piston and valve rings is shown. In Fig.. 9 isshown a development of the motions of the valve -rings during the four stroke cycle. The openingsv 15 and 16 in the two'valve rings 8 and 9 corresponding to the intake port, being indicated by the lower line of small rectangles, while the openings 17 and 18 in the valve rings 8 and 9 for the exhaust port are indicated by the upper line of small rectangles in this figure. The position of the inlet and exhaust ports 13 and 14 is indicated in Fig. 9 lby the parallel lines extending horizontally across thevlines of small rectangles reprethe valve.- openings inthe rings. Studying this vfigure in connection with Figs. 5 to 8, the various movements of the valve rings during the four strokes can be readily traced. Fig. 5 shows the piston at the top pf its strokes with the intake valve just beginning toopen, this point being indi cated by' the rectangles at the left end A of the lower line of development in FiO. 9. Following the development in Fig. 9 rom left to right, it will be seen that the small rectangles, from step to step, are brought to overlap more and more in the field of or between the lines representing the intake port 13, and hence the intake valve continues-to open wider as the piston moves down, and then the openings 15 and 16 move apart so as to close the intake port shortly after passing the line marked B, at which point the piston has reached thebot-tom of its stroke, and compression of the gases drawn into the cylinder will begin. This point is indicated in Fig. 6 of the drawings. During compression it will be seen that the intake valve openings in the rings move still farther out of line with the intake port 13 until the pistonhas returned to its uppermost position, completing the compression stroke, after which the explosion takes place, this point being indicated by the line C in Fig. 9, and represented by the position of the parts in Fig. 7. Continuing to trace the movement of the intake valve ring' l openings through the explosion and exhaust strokes indicated in Fig. 9, it will be seen that the openings 15 and 16 are gradually brought back to the position in which the intake valve begins to' open for a repetition of the four strokes, this position being` indicated on ,the line E which corresponds with the position of the valve openings on Y line A at the left end of Fig. 9. Similarly tracing the movements 'of the valve openings with relation to the exhaust port 14, it will be seen from a study of the upper development in Fig. 9 that the exhaust port begins to open toward the end of the explosion stroke or just before the beginning of the up stroke of the piston on the exhaust stroke, the beginning of Which is indicated 'in Fig. 8 of the drawings which represents the Vposition of the parts when the valve openings are 1n a position also represented on the line D in Fig. 9. Further tracing the openingA of ythe exhaust port from the `line l) te E in Fig. 9, it'will be seen that the exhaust port is quickly brought to full opening and then gradually closed, complete closure of the lexhaust' port, however, not taking place until after the intake valves begin to open for the next stroke as Will be seen by the position of the small rectangles on the lineA at the left end of the upper line of thedevelopment in Fig. 9. It

will thus be seen that during-the operation gin to open and will be fully opened during the-up stroke of the piston when the burned gases Will be forced out afte1 \vhich the four stroke cycle will be again repeated.

Y It will be understood that various modilications in the specific form shown and described may be made Without departing from the spirit of my invention.

I claim:

'1. In an engine the combination of a reciprocating piston, a cylinder provided with inlet and exhaust ports both located von the same side of the cylinder, a pair of annular concentric valve members, concentric with said cylinder, provided with openings corresponding with said ports, a crank shaft adapted to be turned by said piston, a secondary shaft adapted to be` driven by said crank shaft, and operative connections between s'aid secondary shaft and said valve members for oscillating said members circumferentially, and independently to alternately open and close said ports as said crank shaft is turned said connections being located on the oppositeside of the cylinder 'from said inlet and exhaust ports.

' 2. `In a reciprocating engine the combina tion of a cylinder provided With inlet and exhaust orts both located on the same side of the cyllinder, a pair of annular concentric valve members concentric with said cylinder,

each provided with openings corresponding with said ports and means located on the opposite sides of the cylinder from said ports for circumferentially oscillating each valve member independently to alternately open and close said ports, the arrangement being such that the corresponding openings in the valve members are brought into register with each other and With the respective ports to open the same and are moved out of register to close said ports.

In Witness whereofI I have hereunto set my hand in the presence of two subscribing Witnesses.

GEORGE MGDOWELL.. Witnesses Fnrrz ZEIGLER, J r., M. H. Lomrwoon.

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