US1155647A - Internal-combustion engine. - Google Patents

Description

J. DEAN.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JAN.2I,19I5- Patented Oct 5, 1915.

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WLT? 714 COLUMBIA PLANOORAPH C0., WASHINGTON, D. c.

J. DEAN.

Patented Oct. 5, 1915.

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ALUMNA PLANOGRAPH COHWASHINGTON, v.1;

J. DEAN.

INTERNAL COMBUSTION E GINE.

APPLICATION FILED JAN-2|, I915- Patented Oct. 5, 1915.

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COLUMBIA PLANOGRAPH CO WASHINGTON. D. c.

J. DEAN.

INTERNAL COMBUSTION ENGINE. APPLICATION FILED JAN-21.1915.

Patented Oct. 5, 1915.

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J. DEAN.

' INTERNAL COMBUSTION ENGINE.

APPLICATION HLED- JAN. 2], I915.

Patnted 001;. 5, 1915.

6 SHEETS-SHEET 6 Q m 29 Q /9. Q /9 COLUMBIA PLANOGRAPH C0..WASIHNGTON. 1:.c.

'TED s'rarns earner orricn JAMES DEAN, or NEW YORK, it. Y.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Oct. 5, 1915.

Application filed. January 21, 1515. Serial No. 3,464.

York,- in the ,county and State ,of New York,

have invented certain new and useful Im- P i v n sv in lht rn l-flem ue ien gines, ,of which the following is a specification 7 g M V This invention relates to internal combustion engines of the two cycle type, and more particularly those engines which are qu pp i a pump et u ii peraing insynchronism with the Work-mg piston or pistons to clear the burnt, gas from and facilitate the ingress offresh gas to the working cylinder or cylinders.

Th Qu r of my nt t o i t p ovid n e gine f. the yp m n ion wh ch shall be mp in con ru on and efiie ea in P- eration, the salient feature or features there-1 ofcompr s ng improved valve mechanisms onstr e and s sne lto tr flh posit e e a d; p i i th 1S pp y a discharg o ga to d fro t ng ne, a will be hereinafter particularly described and claimed.-

I th d aw gs g 1 s 1 ngit11d nal, yertical section, partly in eleyation, of

a two-,cylinder engine embodying the pro-1 erd te m Qfm-rin n iom he pl n f the section being indicated by thehne 11;

of Fig. 1. Fig. 2 is a similar section, as ,on

theirregular line 2% of Fig. 5. Fig- .:iS

5250f Fig. 3. Fig. (his atransyerse ver-- tical section of. a three-cylinder engine equipped with a modified form of my invention.-. Fig. 7 is longitudinal vertical see tion of the uppenportion oft-he modif edj structure, as on the line i' of Fig. 6. I Fig,

Sis in the main or left hand portion a horizontal section-,- as on theline 8+8 of Fig. 6;.

the right hand portion of the figure being broken: away to present a section as on the line 8 ';8 of Fig. 6.

Referring to Figs. 1 to 5, inclusive, ofthe drawings, 11 designates the working cylinders of which two are illustrated,,. al-.

though, of course, less or more may be employedu r V 3-. l 1 designates pump cylinders, larger in diameter than, and constituting, in effect, continuations of, the respective working DEANJLZL t e cylinders. Fitted to reciprocate in each of the working cylinders and its complementary pump cylinder are the upper and lower heads 13, 1d respectively of a piston 15, the

latter head in virtue of its relatively larger diameter eiiecting a displacement in excess of that of the upper head.

.16 designates the crank shaft, and 17 the rods connecting the cranks 18 thereof with the respective pistons, said cranks being in proper angular relation to each other to effect the timely travel of the pistons.

The fuel inlet ports 19 for the respective working'oylinders are formed adjacent the top of the latter and are adapted to receive the gaseous mixture directly from the carbureter. An important feature of my inventijon resides in the mechanism for controlling the peroidicity of'the inflow of fuel to, and the. auxiliary discharge of the burnt gases from the cylinders 11,- said mechanism, a will presently appear including valves, as 20, 20, which are concurrently and positiyely actuated by power transmitted from the main or crank shaft of the engine.

The main-exhaust port or ports 21 for each of the Working cylinders are formed in the wall of the cylinder near its lower eX tremity, in order that such port or ports shall be opened only when the correlated working and pump pistons approach the limit of their working stroke. 1

Each ofthe piston heazls 13 is'provided adjacent its periphery with an upstanding ported baffle 22 which is constructed and arranged to open and then close communication between the exhaust ports. 21 and the interior of the cylinder 11 as the piston approacheS and reaches the limit of its working Stroke; that is to say, ports 23v are formed atithe foot of the baflie in position to cross the exhaust ports 21 in the'down stroke of thepiston. Hence, as the piston approaches the extremity of its out or power stroke, the exhaust-ports are opened for the discharge of burnt gases from the Working cylinder and are then closed.

ZIIW ports 2% connect each of the working cylinders .at its foot with ducts 25, 26 leading into the top of the annular chamber comprised Ebetween the piston and the pump cylinder, said ports 2 1- being so located that they are opened immediately afterthe opening and closing of the exhaustports 21 by the ported bafile. Consequently the partial vacuum created within the pump chamber by the down stroke of the piston, withdraws V the remaining burnt gases from the working cylinder and induces a flow of fresh'fuel into and through the inlet port 19 of the cylinder, such inlet port at that juncture being in open communication with the source of fuel supply. In the upward movement of the piston to compress the charge thus delivered to the working cylinder, the ports 21, 24 are closed by the piston, and concurrently with the initial upward travel of the piston the fuel inlet to the cylinder is positively closed through the agency of the valve 20 above referred to.

The duct 26 leads to a duct 27 which periodically communicates with the atmosphere through the rotary valve 20 which is arranged in spaced relation to and co-axially with the like valve 20 on a vertical shaft 28.

The valves 20, 20 in the form illustrated comprise rotary tubular bodies,headed at their upper ends, and provided in their walls with ports 29, 30 respectively. They are rotatably fitted in a vertical chamber 31 forming a part of the engine wall, the shaft 28 extending axially through such chamber and being geared with the crank shaft to rotate correspondingly therewith. In the present instance the vertical shaft is provided at its lower end with a spiral pinion 32 in mesh with a spur wheel 33 on the crank shaft of the engine.

The valve 20 is disposed between two ducts 34: leading to the respective inlet ports 19, and it controls the communication of such ducts with a duct 35 which leads to the bottom of the valve from a carburetor or other source of fuelsupply. Thus in each rotation of the crank shaft and the valve 20 the latter is functioned first to open and close communicat on between the source of fuel supply and one of the worklng cyllnders and then similarly to control the communication between such source of supply and the other working cylinder.

The valve chamber 31 communicates at its lower end with a duct 36 leading to the atmosphere and the valve 20 is adapted in its rotation to open and close communication between said chamber and the exhaust ducts 26.

The valve shaft 28 is preferably made in two parts flexibly connected by a two-part coupling head 37 which is fitted to rotate in the space below the valve 20 and thus prevent communication between such valve and the interior of the crank case. This sectional formation of the valve shaft not only enables the valve mechanism to be easilyassembled but it insures the vertical alinement of'the two valves and the accurate disposition of the pinion relative to the spur wheel without the otherwise necessity of nice fitting of parts.

By the above described construction it will be seen that an engine is provided in which the use of pressure-controlled valves is avoided, and that, on the other hand, the

respective ports are at all times positively are controlled by valves operated concurrently, positively and directly from the crank shaft without the. interposition of springs,

-pneumatic chambers or similar -agencies.

*Ience the proper sequential operation of the various ports is positivelv effected and maintained and in consequence a simple and'reli-j able engine of high efficiency'is provided.-

In Figs. 6, 7 and 8 I have illustrated a three-cylinder engine embodying a modified form of my invention. In this modification the rotary valve for controlling the supply of fuel to the inlet ports 19 of the respective cylinders comprises a cylindrical body 20 having appropriately located ports 29, and having also an axial shaft 28 mounted to rotate in bearings-in a bonnet 39 on the respective working cylinders 11; and the rotary valve for controlling the discharge of the burnt gases from the pump chambers comprises a cylindrical body 20 having suitably disposed ports 30 and having also an axial shaft 28 mounted to rotate in-bearings in a valve casing on the engine'wall. The valve shafts 28 28 are coupled by suitable gearing so as to rotate concurrently, the lower shaft 28 being appropriately geared to the crank shaft. In the formillustrated the valve shafts are equippedwith sprocket wheels 40, 41 respectively, operatively connected by a chain42, and the shaft 28 is also provided with a sprocket wheel 43 which is operatively connected by means of a chain -14: with a similar wheel el5 onthe crank shaft. I

I claim 7 s r 1. In an internal combustion engine of the twocycle type, a working cylinder having a fueLinlet port and main and auxiliary exhaust ports in spaced relation to each other, a pump cylinder in communication with the working cylinder through the auxiliary exhaust port, said pump cylinder having a discharge port, a piston adapted to reciprocate within said cylinders and in its travel control the opening and closing of the exhaust ports at predetermined intervals, valve mechanism controlling the fuel inlet port of the working cylinder and the discharge port of-the pump cylinder, and gearing between said mechanism and the main shaft of the engine- 2. In an internal combustion engine of the two cycle type, a working cylinder having a fuel inlet port and main and auxiliary exhaust ports in spaced relation to each other, a pump cylinder in communication with the and the inlet port .to the'working cylinder working cylinder through the auxiliary port, said pump cylinder having a discharge port, a piston adapted to reciprocate within said cylinders and in its travel control the opening and closing of the exhaust ports at predetermined intervals, a rotary valve for the fuel inlet port of the Working cylinder, a rotary valve for the discharge port of the pump cylinder, and gearing between said valves and the main shaft of the engine.

r 3. In an internal combustion engine of the 7 two cycle type, a working cylinder having a fuel inlet port and main and auxiliary exhaust ports in spaced relation to each other, a pump cylinder in communication with the working cylinder through the auxiliary port, said pump cylinder having a discharge port, a piston adapted to reciprocate within said cylinders and in its travel control the opening and closing of the exhaust ports at predetermined intervals, a rotary valve for the fuel inlet port of the working cylinder, a rotary valve for the discharge port of the pump cylinder, a common shaft for said valves, and operative connection between said shaft and the main shaft of the engine.

4. In an internal combustion engine of the two cycle type, a working cylinder having a fuel inlet port and main and auxiliary exhaust ports in spaced relation to each other, a pump cylinder forming a continuation of the working cylinder and being in communi- .cation therewith through the auxiliary exhaust port, said pump cylinder having a discharge port, a piston adapted to reciprocate within said cylinders, and in its travel control the opening and closing of the exhaust ports at predetermined intervals, a vertically-disposed valve chamber adjacent said cylinders, an axial shaft in said chamber, two rotary valves on said shaft, one for the fuel inlet port of the working cylinder and the other for the discharge port of the pump cylinder, a member 'on said shaft rotatably mounted Within the valve chamber and adapted to close the lower portion of the latter, and gearing between said shaft and the main shaft of the engine.

5. In an internal combustion engine of the two cycle type, a plurality of working cylinders having fuel inlet ports at or near the top, and main and auxiliary exhaust ports at or near the bottom, pump cylinders in communication with the respective working cylinders through the auxiliary ports, said pump cylinders having discharge ports, pistons adapted to reciprocate within said cylinders and in their travel control the opening and closing of the exhaust ports of the working cylinders at predetermined intervals, valve mechanism for the discharge ports of the pump cylinders, a common rotary valve for the fuel inlet ports of the Working cylinders, and operative connection between said valve and the main shaft of the engine.

6. In an internal combustion engine of the two cycle type, a plurality of working cylinders having fuel inlet ports at or near the top thereof and main and auxiliary exhaust ports at or near the bottom, pump cylinders in communication with the respective working cylinders through the auxiliary exhaust ports, said pump cylinders having discharge ports, pistons adapted to reciprocate within said cylinders and in their travel control the opening and closing of the exhaust ports of the working cylinders at predetermined intervals, valve mechanism for the fuel inlet ports of the working cylinders, a common rotary valve for the discharge ports of the pump cylinders, and operative connection between said valve and the main shaft of the engine.

7. In an internal combustion engine of the two cycle type, a plurality of working cylinders having fuel inlet ports at or near the top thereof and main and auxiliary exhaust ports at or near the bottom, pump cylinders in communication with the respective working cylinders through the auxiliary ports, said pump cylinders having discharge ports, pistons adapted to reciprocate within said cylinders and in their travel control the opening and closing of the exhaust ports of the working cylinders at predetermined intervals, a common rotary valve for the fuel inlet ports of the working cylinders, a common rotary valve for the discharge ports of the pump cylinders, and operative connection between said valves and the main shaft of the engine.

Signed at New York, in the county and State of New York, this 12th day of Jan uary, A. D. 1915.

J AMES DEAN. Witnesses:

B. CHANDLER SNEAD,

WILLARD WVADswoRTH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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