US1623385A - Internal-combustion engine - Google Patents

Description

Apnl 1927' E. R. BURTNETT INTERNAL COMBUSTION ENGINE Filed Nov. 22. 1923 Patented Apr. 5, 1927.

' EVERETT Rf. BURTNETT} OF LOS' ANGELES,

FORNIAQ r VOL'U'N-TARY- TRUST. V

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Appiicamh filed itoirembr tion'f engines of the general type di'selbse'd in my'c'o p'ending application tor SL'Letters- Patent fiIeCTJanua'ryA; 1923; Serial N0.

The principal'object bf iny" present "invert tion 'is to I generally improve upon and-'- simplify the construction of i the intention: disclosed in my "application aforesa d and; to provide an engine of thetwmstroke cycle degree of effieien'cy withr'elatively low-1 cost- -v described anclfclziirhecl, and illustrated 'inth'e Further obj eats of lny iinfention are to provide an engine of the character described wherein a pair of conib'ustion chambers a e connected" at their upper or outer'ends by a common clearance space which pefrtfbr'ms the functions of a common combustion and? expansion chamber to arrange beh'fin'tl and" in line with the co'm'lo'ustior "chambers a j gaseous fuel" pumping cylinder," the axis of which is substantially parallelianclhlwthe same plane with the axes ofthe' combustion cylinders; to arrange" oril-Yjone" sidebff the pumping, cylinder and laterally; with respect to the plane occupied by the axes of" the combustion and pumping, cylinders a cylinder and a pistonvalv'e thereinwhich piston Valvecontrols the adiniss'ionbfgaseous fuel into the umping:'eylindery fiw to actuate such piston valve fr'orn' a j s'ecrn'icl any: or: auXi-liar crank shaft that is dr'i'ver'if atthe same speed as the; main cr'a'nk -shajft of the'engin'e and to which latter"tl1e"pistons" in the" combustion cylinders "and pumping! cylindersare connected."

l/V-ith the foregoing a'ncl'otherobjeetsln View, my; invention consists in thefnovei; features of cons'tructmn and arrangemento'f -t th t .will be hereinafter more" fiilljl accompanying.clrawingsein whichfe I Figure-1 is' aryertical section lengthwise through the center of an engine of IHYEIII'F' provecl' constructiony Figure 'is a ver linfe 2- 2 of Figure. 1'; i

Figure 3;1sa"hor1zontal section taken ap proximately-on the line 3-3 of li lguie 1;

, Figure 4 vis a detail sectlonal v 'ew show lll'gg the-transfer: duct from the pumping f cylinbler to 'the adjaeefitooinbustion cylirider: 1

Referring: by numeral's' to the accompany? 1 ing drawings, which illustrate ax'prabticala embodiment of my invention; lO'fdesignates a cy'llifdel' "='block which is preferably cast in a single piece and thewallsofwhieh are provided with connected chambers: 11', through which may be circulatekl a'j fi-u id cooling mediuin such as' water; torthepu'ripose ofdisseminating? theheat genera-ted! clui in g operation of the engine. V Formed in the cylinderb'lo'ok l of com'busti'on chanihers; 12 and lifi'rand a.

pumpingicharnber 14, said chambersi -beingj'l arranged: in a row with their axes; sub

stan'tiallyparallel ancl 'occupyingr thevsamer Plflli- Foll'he puinpingbhainber14; is apiston ta l ve' cham-"a ber' 15 the axis of which-is substantially parallel with the axis ofsaicl' pumping zchaniw beri' Secured-to the to'p of lolock 10'is -aw' through which maybe circulated fluid'ico'o'b ving medium, and? formed in the underside of this head and connecting the upper 'pon 'tio'n's of the combustion chambers" 12 ztnd 13,

is 'aicomnion clearance chamber 182 Y so Formed in "the u'nclersicle" of heacl b1ock= 16; isa shallow chamber 19 thatisdispiosed substantially at ri htangles "to the chaih'ber 718", and sa ic'l chamber *19"establishes com-= r Inunic'ation between pumping; chamber 14" '85 anlfpiston valvechain lfii j v Leading from"the=end o f chamber 19-5 that :COIII'IIrLTHiGaES with -c1ian1'b'er 14, lSf an outlet: i

20 that communicates with a duet-"21; the lower end "of which communicates f with an r in1tport -22'th ah is formed; inthelo'loolr 10'- atapoi-nt intermediate the' ends f combus:. 1 tion chamber13. T H Seated in the central -p'o r'tion of block- 16 and preferably a bove' the '-'combustio chant-T" '-ber13-," is an iignitiorr clewice; such as a spark plug-'23 fan c'l the terminals of the electrodes thereof 'projectinto the chamber I83 v Formed through the wall of fb'lock "10 im the same horizontal pla 1e-' with port 22;" is: 7 an" exhaust port "Q Pth'at-leads from the in Arranged" beneaththefblock 10 is a Suit d in sa-i'cl block *10, to one side of the; 70 i ,mately at the halfway point on itsdoWn- I ward stroke, and as thepiston valve .36

f moveslu'pward, inlet port 38 isclosed, and on i the succeeding upwardrstrokeofpumping I piston. 32, the gaseous fuel charge drawn into ably formed crank case 25, having bearings V 26 in its, ends for a crank shaft 27, and-the flatter being provided with two cranks 28 vand 29. These cranks are oppositely disposed or arranged approximately 180 degrees apart, and crank 28, which is approxi mately twice the length of crank 29, but with the same radius of throw, is located beneath chambers '12 and 13, while crank,2 9"is 10-;

cated beneath chamber 14.

Arranged for reciprocatory movement within chambers 12 and 13 are pistons and 31 respectively and these pistons are connected by ordinary connecting rods 32 -to crank--28.- i a '7 A pumping 'piston32 is arranged for operj *ation within chamber'l4 and a connecting rod-33connects said piston with crank 29.

Arranged for rotation in suitable bearings in the crank case 25, is a secondary crank {shaft 34,"the axis of which is parallel with "the axis of crank shaft 27 and this-secondarycrank shaft is directly connected to "the-said crankshaft-27, so as ,to rotateiit the same speed bymeshing pinions 35, as

shown,'or bysprocket wheels and a'chain,

i The crankshaft 34 is arranged beneath the piston valve cylinder 15 and arranged for operation. Within the latter is" a piston; yalve 36, the same being connected to the 1 cranki of shaft 34 by a connecting rod 37 Formedthrough the wall of the, cylinder 7 "I I "block that-surrounds chain 15, is a gaseous Qfuel inletport- 38, the latter being arranged so that it is wholly open when piston valve 36 isfat the lower end of its stroke. I The operation ofmy improved engine is I It follows: a 1

1 V 3 -While piston. valve is at the lower end 40 of its stroke, a charge, of gaseous fuel enters chamber1'5'through openport38 and this charge'of gaseousfuel also fills chamber 19 and the pumping chamber 14; At the time the piston valve 36 is at the lower end of its stroke, pumping piston 32 isvapprox the chambers 14 and 15' will be compressed thereinland alsoin the=connecting chamber 19 andin the duct. 21.--

V Pistons 30 and :31 move *gether followingignition of a compressed downward togaseousfuel charge-in. the common chamber 18*andthe upper portions of chambers 12- "and 13, and as said pistons approach and l jpass'low center, or the-lower ends of their ,travel, inlet port'22 and exhaust port 24 will 0 en,, so that the compressed gaseous fuel c ar'gewill pass from duct 21, through port 22,.into and through chamber 13, thereby f drivinglbefore it, the products ofcombustion from .t

e previously ignited charge, and said products of combustion, or the greater portion thereof, will be forced out through exhaust port 24 as long as the sameis open.

As piston 30 starts on its upward or inward movement, ports24 and 22 are closed,

"31 pass their high centers, the compressed charge will be fired by aspark produced beand ,as the pistons 30 and 31 continue their tween the terminals of the electrodes or spark plug 23.

' As the compr'essedcharge is thus ignited,

the relatively highpressure following combustion will drive the pistons 30 and 31 downward on their power stroke.

Thus it will be seen that I have, provided a relativelysimple two stroke'cycle internal combustion engine, having twin power cylinders, a gaseous fuel pumping cylinder, said three cylinders being arranged in a row and a gaseous fuel inlet controlled piston valve that is arranged laterally of the pumping pistons and which piston valve is operated from crank shaft that is driven directly from the main crank shaft of the engine,

and which arrangement provides a very compact structure-that may be economically operated in point of fuel consumption.

7 It is obvious'that constructionof the 'en-' gine, as herein shown and described, may

bemodified in minor details without departioo ing from the spirit of my invention, the

scope of which is set forth in the appended claimp I claim as my invention: 7 A two stroke cycle internal internal combustion engine unit of four cylinders, two of the cylinders being joined by a single compressi o'n and combustion clearance chamber that is 'formed lengthwise parallel with the axes of the crank shaft, exhaust ports in one of the two cylinders that are joined by the s 7 single clearance chamber, inlet ports formed in the wall of the outer one of the two cylinders that are joined by the single clearance chamber, a charge pumping cylinder,.a piston valve cylinder, inlet ports formed in the wallof said piston valve cylinder, asingle COIIIPIBSSl OII clearancechamber joining said pump cylinder and the piston valve cylinder, the piston valve'cylinder beingdisposed to the side of and parallel with the pumping cylinder, the compression clearance chamber that joins the pump cylinder and the'pistontvalve cylinder extending laterally with respect to the plane-occupied by the row of three cylinders, a separate crank shaft fordriving'the piston valve,engine speed actuated driving means between the main a duct extending from one end of the lateral clearance chamber, that joins the pistonvalve cylinder to said pump cylinder, to an inlet port formed in one of the combustion cylinders arranged in the row .of three cylinders, a separate connection between each of the pistons in the comhusti'on cylinders and the charge volume pumping cylinder and the main crank shaft and said main crank shaft having a separate bearing periphery for each connection.

In testimony WhereofI aflix my signature.

EVERETT R. BURTNETT F-

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