US1626279A - Intake valve - Google Patents

Description

pril 26, 1927. 1,626,279

J. E. HARRIS' INTAKE VALVE Filed Jan. 4. 1926 2 Sheets-Sham*I 1 .2 y; mx M/ Ah/ a@ MYI/ess:

April '26, 192'?. l2279 J. E. HARRIS INTAKE vALv Filed Jan. 4. 1926 2 sheets-sheet 2 i v ///,///;4//////7// f //f @nu Patented Apr. 26, 1927.

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' JASON E. HARRIS, 0F HOWARD, KANSAS. l

INTAKE VALVE.

Application ledJanuary 4, 1926. Serial No. 79,149.

efficiency and reliability of operation of such valve mechanisms., v

With these objects. int-view, the invention consists in certain novel and useful features of construction and arrangement .ofi parts, as hereinafter described and claimed; and in orderl that it may be fully understood reference is to be had'to the accompanying drawings, in which Figure 1 is a central vertical section of an internal combustion engine embodying intake valve mechanism embodying my invention, certain conventional parts of the engine being omitted.

Figure 2 is an enlarged central longitudinal section of a part of the engine.

Figure 3 is a cross section on the line III- III of Figure 42.

Figure 4 is a crosssection on the line IVv-IV of Figure 2.l l

Figure 5 is a section on the line V- -V of Figure 2.

Figure 6 is an edge'or side viewv of the vintake valve. v

Referring to the drawings in detail, where likeV reference characters identify corresponding parts in all of the gures, .1 indicates a suitably journaled' shaft having a crank 2 enclosed within the crank case 8 of the engine, and @l indicates cylinders rigid and communicating with the crank case and dispose diametrically with respect to the journaled ends of the crank shaft.' Connecting rods 5 extending into the cylinders, are 'pivotally connecte-d in any suitable or preferred manner to the crank of the crank shaft. At their outer ends the connecting rods have a pivoted relation with the pistons 6 fitting for reciprocative action within the .respective cylinders .the pivotal connection between the connecting rods and pistons beingvmzide by means of cross pivot pins 7.

Each piston has a head 8 set back between its `outer end and its respective pivot pin 7, the head being in the .form of an karimilar flange provided with'a circularseries of y equi-spaced ports 9.r The Vhead constitutes a seat for a rotary orloscillatory valve 10 occupying and substantially filling the space outward of the ported'liead or valve seat,

the valve being'provided with a step-shaped groove 11 wherein i'its a retaining ring l2 vscrewed into the outer end: ofthe piston to hold the valve properly upon thevalfve seat.

The valve, like the seat, is provided with a circular seriesof equi-spaced ports 1 3'for registration with the valve seat ports when the cylinderV is being charged with acornbustible mixture or gas supplied through vand from the rear end of the piston in. any

suitable manner, not shown, as forming no part of ythis invention.

The valve is provided centrally with an *inwardly-projecting stem 14 having one or more spiral teeth or grooves 15. The stem is provided with -a central bore 16, enlarged at its outer end to constitutea pocket-17 and at its inner end to constitute a pocket y 18, and the wall of the last-named pocket is provided with a notch 19 for a purpose which hereinafter appears. A piston'2() fits;

snugly for longitudinal reciprocation in the Vpocket 17, and has a stem 21 extending through the bore 16 of valve 10, and fulcrumed on `the rear end of said stemy 21 is a link 22, pivotally connected at its opposite end to a rocker-aim 23pivoted to a. lug24 projecting from the adjacent end of the respective connecting rod 5. A spring 25 secured tothe piston lin any suitable manner,

exerts outward pressure on` the fulcrumed.

link 22, hold' the arm 23 swung away from' the pivot pin 6. Thisl is true alsoy when the firing. action occurs, as at such time the f Y,

holdy the pistonk 20 repressed'- When the cylinder pistonV moves inward on its suction v explosive force is sufficient toY repress and stroke or outward on its exhaust stroke, the spring 25 has sufficient ower to advance the piston 20 and hence iold .the'f-ree end of the arm 23 closer tothe piston pin 6. The

reason for thus Vpositioniirig the arm 2 3 as explained, is to. eiect oscillation of the main i valve through the instrumentality of parts die new to be described.

A collar 26 fits slidinglyfon thelstem 14 of the main valve and engages with a geared ci relation the tooth or groove 15 of; said stein toturnthe latter, and said collar is provided with diametric'trunnions 27 pivotally engaging a lever 28 extending across the interior of the cylinder piston and fulcrumed at Yone'end as at 29 vupon said piston.y The opposite or 4free end of the lever is connected by a retractile spring 30 to a fixed point, such V`as a screw 31 secured to the skirt of. thev piston, and tends to hold the lever in the withdrawnposition shown in Figure 2, with "the'collar 26 at the innerendoic the stem 14,

yit being noted that the lever lits at its free end betweenr guide ribs 32 formed on the piston, to be guided in its swinging move-V Near its ulcrumed end the lever is ments. .Y provided with an opening 33 through which the free end of the arm 23 is adapted to pass under proper `chang-e in 'the angular relation betweenthe connecting rod-and the cylinder when the piston 20 is withdrawn. 1lWhen the piston 20vis advanced under the pressure of spring 25, and shifts outward 'the ulcrum point oi' the link, the latter swings the arm 23 inward ont of register ywith the opening 33 'of the lever andy hence" causes `the freeV fend of vsaid arm asthe change of angular position between the cylinder piston 'and the connecting rod occurs, as above referred to,

Vto' press against the lever inward of said opening 33V andforce the lever to swing outwardly and thereby impart outward movement to the collar 26, which outward movea ment through'the engagement of the collar jwi-ththe spiral ltooth or groove oi. the stem 14 `effects a slight rotation or oscillation of the valve-to etifectV registration between the ports 13 thereof and the ports 9 of the valve seat. 'As this action is coinpieted as the cylindcrV pistonV attains its Voutward limit of Y movement, gas is permitted to rush through the ports to the'head endv 01' the cylinder, and as tl'iefpiston begins its `inward or suction strokeVt-his flow of gas continues. By the time the. cylinder has made a half' revolution, ifthe engine is of that type where fthe crank shaft is stationary, or by the time the Ycrank has made ahalf revolution i'itiie .cylinders yare stationary, the piston attains its fully withdrawn position and there is a fiiull'charge of gas'in the cylinder outward of `the cylinder piston, and as the latter begins 'its outward-or compression stroke the `gas Apressure developed by such action represses the piston 20, 'and as this occurs the spring30ivithdraivs the lever and the latter by *withdrawing the collar, Vreverses the rotation or oscillation of the valve and closes communication between the interior of theY ypiston and the vcylinder forward-of the pis- Vcylinder with fresh suction stroke.

` of spring 00.

ton. YThen the piston hasbeen fullyie-advanced and the compressed charge Yof gas Vis exploded by the spark plugl and connections, 1

not shown, the pressuredeveloped Vas hereinaiter stated, maintains the piston 2() in its repressed position until the Vcylinder has made another half revolution, and shortly after the ensuing` revolution begins to effect the expulsion of the dead gases-the exhaust port, not shown, being nowk oplen-'the'spring 25 again re-advances theivpist'on QOas Verplained. Thepfston 2O remains `in this po'sition through thee'nsuing suction stroke,fand

as the nextv compression strokebegins lSaid Vpiston 2O is'again repressed the pressure of the gas,to eii'ectrthe reclosingV of the It will thus be seen that the valve control' mechanism is entirely automatic and valve.

is ycontrolled throughV relative changent angular positionbetween the respective pistons and connecting rodsmln Figure 1 the four pistons andtheir equipment, are shown asl occupying the fourrpositions which each piston and its equipment occupies duringl one drawn position and is starting on its comso"VY pression stroke, and thelei't hand piston has l completed about halfl of its compression stroke. Then the lefthand pistonattains the topmost positionand the Vexplosion occurs, the piston 20 'will remain in repressed positionffor about a half a revolution because the force or power exerted vby the explosion and expansion of the gases will overcome the resistance ofthe spring 25,"and shortly after Y said piston has passed its undermo'st or 'halfrevolution position and has started on its exiiaust stroke withV theexhaust'port open,

the said spring 25- will re-advancethe piston 2O .and it will remainrin such position until it has re-attaiiied itsY topmostp'osition,

'at which time `the exhaust gases liavebeen expelled, and the valve VVhas 'e again been opened to provide for the recliarging'of the gases upon the ensuing lt will be notedv by reference to Figures 2 and 3, that to accommodate the advanceojl Y fiiston 20'Vwithout corres ondin movement oflever 28, the valve stem must"iiot only A be'notched as'at 18, as described, but-the collar 2G must have a registering internal Anotch 26a' into which the vlink 22 advances las it draws the rocker-farm inward.` notch 26a is required of course, only on the The theory that the pressure developed ahead of the cylinder piston. in the Vexhaust stroke, 'Falls enougli'to be overboiiie by the power g ..1 Y hausting gases preponderates over that oi said spring, the piston 20 .will not advance at Ifsuch pressure of Ythe ex- Til) Leader/e v the time mentioned, and' if so, the internal notch 26a will ndt be necessary. It ispossible however, to so proportion Aor arrange the parts'A that the collar shall never interfere with the proper advance of the piston to dispose the rocker-arm in position to advance the lever when it is necessary to open the valve for the suction stroke of the cylinder piston.

From the above description, it will be apparentthat I have produced an engine embodying the features of advantage set forth as desirable in the statement of the objects of the invention, and it is apparent that the mechanism may be modified in various particulars without departing from the principle of construction and mode of operation involved or from the scope of the appended claims.

I claim: Y

l. The combination of a shaft havinga crank, a crank-case enclosing the crank of the shaft, a cylinder rigid and communicating at its inner end with the crank-case, a reciprocatory piston in the cylinder and a connecting rod pivotally connecting the pis- Vton and said crank, the piston havinga ported head constituting a valve seat; and oscillatory valve upon said seat and provided with a chamber kin its face and a port to register at times, with the port of the valve seat to establish communication be tween the interior of the piston and the head end of the cylinder, a piston in said chamA ber, means tending to advance said lastnamed piston, a link bearing a fulcrumed relation to the last-named piston, a rockerarm pivotally connected to the connecting rod and tol said link, and means for oscillating the valve under pressure applied by the rocker-arm incident to a change in the angular relation between the cylinder and the connecting rod when the said valve-carried piston is advanced.

2. The combination of a shaft having a crank, a crank-case enclosing the crank of the shaft, a cylinder rigid and communicating at the inner end with the crank-case, a reciprocatory piston in the cylinder and a connecting rod pivotally connecting the pisf ton and said crank, the piston having a ported head constituting a valve seat; an oscillatory7 valve upon said seat and provided with a chamber in its face and a port to register at time, with the port of the valve seat to establish communication between the interior of the piston and the head end of the cylinder, a pistonin said chamber, meansY tending to V advance said last-named piston, a link bearing a Vful4 crumed relation to the last-named piston, a rocker-arm pivotally connected to the connecting rod and to said link, means for oscillating the valve under pressure applied by the rocker-arm incident to a change in andthe connecting rod when the said valvecarifiedf piston-is advanced, and means for effecting reverse action` of the vlalveeoscillatngmeans to` reverse the oscillation ofthe valve-as 'saidI connecting rodreverse's its angular' relation with respect tothe cylinder piston. v

3. The combination of a shaft having a crank, a crank-case enclosing the crank" of the. shaft, a cylinder rigid and communicating at its inner end with the crank-case, a rcciprocatory piston in the cylinder and a connect-ing rod pivotally connecting the piston and said crank, the piston having a ported head constituting a valve seat; an oscillatory valve upon said seat and provided with a chamber in its face and a port to register at times, with the port of thevalve seat to establish communication between the interior of the piston and the head- .end of the cylinder, a piston in said chamber, means tending to advance said lastnamed piston, a .link bearing a fulcrumed relation to the last named piston, a rockerarm pivotally connected'to the-connecting rod and to said link, a lever within and fulcrumed on ,the cylinder piston and provided with an opening, a spring tending to hold said lever swung toward the inner end of the cylinder with its opening in position to receive Vthe free end of thel said arm as the latter is advanced by a change in the angular relation between the cylinder piston and the connecting rod when the valve-carried piston is retracted, and a gearing connection between said lever and the valve for holding the latter against accidental oscillation when the lever is at rest;

t. The combination of a shafthaving a crank, a crank-case enclosing the'` crank of the shaft, a cylinder rigid and communicating at its inner end with the crank-case, a reciprocatory piston in the cylinder and a connecting rod pivotally connecting the piston and said crank, the piston having a ported head constituting a valve seat; an

`oscillatory valve upon said seat and pro vided with a port to register at times, with the port of the valve seat to establish cominun-ication between the interior of the piston and the head end of the cylinder, and provided with rearwardly projecting stem and a bore enlargedat its front .end to for'm a chamber, al collar slidable longitudinally upon said stem and bearing a geared relation thereto to turn the valve to open position or to closed position accordingly as the collar is movedoutward or inward, a lever pivoted to said collar and fulcrumed at one end on the cylinder piston, a spring connected to the lever and normally holding the same retracted inwardly with respect to the cylinder, a piston in the said chamber of the valve, provided with an inwardly-pro ,-jecting stem,- a link ulcrmned uponthe a rocker-arm pvoted to the connecting rod and to said link, and adapted accordingly as` the valve-carried piston is advanced or retracted, toA appl57 or not apply advancing `pressure on said lever as the connecting rod in changing its angular relationv togthe cvl-V inder piston', advances said arm.A l

In Witness whereof kI hereunto ax my signature. n I

JASON E. HARRIS.

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