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Publication numberUS1215383 A
Publication typeGrant
Publication dateFeb 13, 1917
Filing dateMar 9, 1914
Priority dateMar 9, 1914
Publication numberUS 1215383 A, US 1215383A, US-A-1215383, US1215383 A, US1215383A
InventorsBertram C Kenyon
Original AssigneeDodge Mfg Company, Bertram C Kenyon
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Two-cycle internal-combustion engine.
US 1215383 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



' Patented Feb. 13,1917,



4 1,215,383. v Patented Feb.13,1917.

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' stroke of the pistons or each ,ternal-Combustion E following is a specification.

To all whom it may can em:

Be it known that I, BERTRAM C. KENYON, a citizen ofthe United States, residing at lshawaka, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Two-Cycle Inngines, of which the y Invention relates to 'improvements in two-cycle internal combustion engines and it appertains more especially to the features pointed out in the annexed claims.

his type of power unit is also known as a two-stroke engine because it has a .power stroke for each two movements tons during one complete revolution of the crank shaft. The embodiment of these features in practice'produces a much 'steadier turning movement than is possible with the well known Otto four cycle engine which has only one power stroke for of four strokes of the piston complete constructlon comprises the use of two opbecomes available for each one-half revolu tion of the shaft thus increasing the steadi-' ness of action very materially over a single cylinder of the same type. I

- In addition engines of this type entirely these ports are formed in the cylinadmit the power charges and also permit the exhaust gases to leave the cjlinconstruction and the minimum number of actuating parts enables one to build this form 0 engine, more economically and with'greater rapidity than similar engines have been made heretofore. With these and correlated endsin view I in t . The cost of my-invention without specific details shown.

Figure 1. shows a side elevation in sec tion.

.Fig. Fig. 1.

Fig. 3. is an end view broken away.

2. is a cross section on line 3 y of showing parts of Fig.3. v

Fig. 5. is an elevation in section showing the crank disk recess. I v

Specification of Letters Patent. Application filed mm]. 9,

pistons and cross head slide.

with timing gears and valves. J11

g recesses 10 and 10 -1I1g S. I valve 14- and pipe 15. T Fig. 4. is a lengthwise section online w w I 1914.. Serial no. szaeaa.

Fig. is an elevationof a crank disk and crank pin fastening. -F1g.' is a perspective e drawings the locationuof the carsecure the shortest and least pas- Ifatented'Febl 13,1917.

of the one-part: k

showing sageways between the compression chamber and the working cylinders.

Two cylinders, 1 and 2 are-cast with the usual waterjacketing, an enlarged rectangular opening' leading into the cylinder proper, inlet and outlet ports .and the required by-. passes. 7 When these castings are joined so that the flanges 3 register with each other and suitable bolts 4 hold them together a large rectangular chamber is formed, onehalf D portion in casting 2 and the other half or E portion in cylinder 1. Inlet chambers A and A and,exhaust openings B and Bf are forme uncovered by the pistons in their to and fro movement.

The cylinders have lugs 5 cast thereon by I which they-are secured to the chassis of an their outer ends and central of the cast-in,

"heads. Inlet ports 7, arranged in pairs, lead into cylinders 1 and '2 from the chambers A and A and exhaust ports 8, similarly arranged lfad out of the cylinders into exhaust areas B a d B. These may be led into whatever arrangement of pipes, etc.,. desired. Cooling chambers 9 are cast around the working ends of the cylinders and annular are cast into the inner end of the cylinders so as to open into the compression spaces E and From recess 0' a by-pass 11 leads to inlet chamber A serving cylinder 1 and from recess 10 bypass 12 leads to inlet chamber A serving cylinder 2. The fuel intake is placed on the joining line between the twocylindefcast It comprises thecarbureter 13, check he piston casting combines, pistons 16 and a rectangular cross head frame 17. The pistons are hollow, having deflecting projections 18'cast on their working ends so so as to be alternately r and the usual paekinga-ings 19 encircle them. The rectangular. frame 17 stroke emanating from cylinder 1, thus bescrves as a compression piston, while sliding ing gotten ready for its ignition as" the to and fro in chambers E and D, alternately stroke ends, again pushing the pistons tosucking in fuel charges and compressing ward cylinder land repeating the operation. 5 them ready for delivery to the working The exhaust Occurs as the pistons reach the cylinders. The deflectors 18 may be cast as end of the power stroke by reason of ports shown in Fig. 7 on an arc of a circle concen- 8 being uncovered by the pistons in alter-- trio with the piston, presenting a convex wall nate order. The inrushing charges are detoward the inlet port, or in any other form flected by projections 18 toward the ends of desired. the cylinders from which they recurve andgygg, Within the rectangular frame a cross'head drive out the products of combustion of the 20 slides transversely to the movement of previousexplosionbuttheirprogress-through the pistons. This may have any anti-fricthe exhaust ports 8 is arrested on the first tion. lining and oiling arrangement desired. portion of the out stroke of the pistons.

A crank pin 21 rotates within it. This pin When engines of this type are used or as may be forged solid with crank disk 22 and automobile service'they may be placed transshaft 23, while disk 24 may be forged solid versely of the chassis to advantage, as then with shaft 25. The crank pin 21 is tapered it is a simple matter to connect the driving at 26 where it enters a corresponding hole shaft to the crank shaft by a suitablc clutch, I of the disk 24 and to which it is secured by one part of which may be formed in the fly a pin 27. To assist in keeping the disks cenwheel. From the foregoing escription it tral concentric bosses 28 are formed. These, will be seen that enginesbuilt to my novel rotate in corresponding recesses formed in type are as simple as possible to make and the engine castings. Shafts 23 and have likewise free from omplexity of operation.

, 25 hearing in projections 29 cast half and half Engines of the two stroke type'have'hereto- 9a in the main castings. In addition the disks fore been made with separate pistons, tie

22 and 24 fit into annular recesses so as torods, connecting rods, bar cranks, 'stufling seal in the movement of the compressing boxes, roller cranks, splines, gudgeon pins,

. frame 17 and prevent the compression eakperforate pistons, etc., all of which parts are 30 ing from the recesses. 10 and .10 onto the omitted in my engine hence its simplicity n5 opposite side of 17 through the space occu-- is quite obvious. v

pied by the disks 22 and 24:. This is accom- What I claim is, plished by'castin'g a wall 30 at four points 1. In internal combustion engines, a pair 7 opposite the vertical diameters of disks 22 of pistons integrally formed with each other a and 2 1 thus sealing off chambers 10 and 10' having an enlarged transverse rectangular and as shownin Fig. 4. frame serving as a compressor therebetween The rectangular compression chamber whose walls in one plane are approximately E-D in which the supplemental piston the same as the piston diameter and in a 17 slides serves a double purpose, by formplane perpendicular thereto project radially 40 ing a means for compressing the working from the pistons forming a rectangular 105 charges and at the same time preventing the space within the walls with open sides therepistons turning on their axes, thus avoiding to, a suitable casing for the pistons having the use of inefficient splines or other makewalls which inclose separate cylinders and shifts to prevent twisting strains and fricpreliminary compression chambers the latter tion between the crank pin and driving atbeing rectangular to conform to the shape me tachment to the pistons. of the compressor frame forming a guide The procession of operation may be defor such frame and at the same time closing scribed as follows. Air and fuel are sucked the open sides of the frame, inlet and outlet past the checkvalve into chambers E and ports to the cylinders, separate passage-ways D on the out stroke of pistons into cylinder connecting from the compressing chambers 115 1 which on their return stroke toward to the inlet ports of opposite cylinders, cylinder 2 is compressed in" space D and whereby as the pistons move to and fro flow recess 10'. Just as soon as this stroke has is established in the passage ways in alterabout ended the compressed charge will rush nate sequence.

through by-pass 11, chamber A and ports 7 2. In internal combustion engines, a pair 126 into cylinder 1 where it is further comof oppositely placed-interconnected cylinpressed as the piston again moves into this ders, an enlarged rectangular chamber becylinder When at the endof this stroke the tween them inclosed by their connecting charge is ignited and the pistons are sent walls, an integrally formed power unit comtoward'cylinder 2, repeating the operation. prising an open sided rectangular frame be- 12 As the piston moved into cylinder 1 the tween the two pistons the pistons and frame charge contained in chamber E was combeing simultaneously movable respectively ressed and forced into recess 10 from which in the cylinders and said chamber, a crank y it rushed through by-pass 12 into cylinder shaft, crank disks thereon, recesses in the 2, to be further compressed on the power walls of the enlarged chamber for said disks, 1:

25 mg closed by the crank disks and the side ELMER G. RICHARDS.

a crank pin connecting the disks, a movable Walls of the chamber, a cross head on the ,member on said p1n,'means for operativel} crank pin and slidable within the rectanguconnecting the member and the frame of larframe, and suitable passage-Ways from the power unit, 'andmeans embodying the the supplementary annular chambers to the walls of the enlarged chamber and the disks opposite cylinders. 30 for closing the open sides of the frame. 4. A double ended piston, a rectangular 3. In internal combustion engines, a twoframe castintegrally with said piston the part casting comprising a rectangular porwalls of which'are adapted to serve as sup tion forming a compression chamber oneplemental pistons, a rectangular two-part half in each'part, a cylinder in each part chamber inclosing said walls, separate ,cyl- 35 connecting with the chamber, a supplemeninders cast integrally with the chamber tal enlarged annular chamber between each walls, a sliding block within the rectangu cylinder and the compression chamber, suit: lar frame, circular recesses within the cham a' le bearings transverse of such chamber, ber walls, crank disks rotatable in said recircular recesses formed on the inner walls cesses, a crank pin passing through the slid- 4 of the chamber concentric with the hear ing block and connected to each crank disk, ings, crank disks in such recesses, a crank shaft extensions to the disks, and suitable pin joining the disks, suitable shafts exducts or passage ways leading between the tending into the beam gs from the disks, cylinders and the rectangular chambers.

a one-plece reciprocating member comprisn testimony, whereof I affix my signa- 5 ing two power pistons slidable in the cylinture in presence of two witnesses. ders aforesaid and an open sided rectangu- BERTRAM O. KEN YON lar frame movable in the compression 'cham- Witnesses:

ber between the cylinders its open sides be- EDWIN F. MOORE,

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2621639 *Mar 24, 1948Dec 16, 1952Chrysler CorpEngine
US3745981 *Sep 2, 1970Jul 17, 1973Warner HInternal combustion rotor engine
US4385597 *Jul 21, 1981May 31, 1983Frank StelzerTwo-stroke internal combustion engine
US5036667 *May 9, 1990Aug 6, 1991Thatcher Eric AFluid power engine
US5285752 *Apr 23, 1993Feb 15, 1994Single-Stroke Motors, Inc.Internal combustion engine
US7614369 *May 12, 2006Nov 10, 2009Motorpat, L.L.C.Reciprocating cylinder engine
US20070107679 *May 12, 2006May 17, 2007Walter SchmiedReciprocating cylinder engine
U.S. Classification123/55.7, 123/62, 123/74.00A
Cooperative ClassificationF02B2075/025