US1010939A - Internal-combustion engine. - Google Patents

Description

G. A. METGALP & L. T. ROCHBLEAU.

INTERNAL COMBUSTION ENGINE.

APPLIOLTIOII FILED JUNE 16. 1911.

Patented Dec. 5, 1911.

IN VENTORS J I T a a @i a L7 4. I IrIHIE (f V\ s d w I 1 EN W WWW, W a J k WITNESSES UNITED STATES PATENT OFFICE.

GEORGE A. METCALF AND LOUIS T. ROCHELEAU, OF WOONSOCKF NI I' INTERNAL-COMBUSTION ENGINE.

To all whom it may concern:

Be it known that we, GEORGE A. MmcALr and LOUIS T. ROCHEL'EAU, citizens of the United States, residing at lloonsocket, in the county of Providence and State of Rhode Island, have invented new and useful Improvements in Internal- Combustion Engines, of which the following is a specification.

This invention has to do with internal combustion engines of the twocyole type; and it contemplates the provision of a valvelcss engine, of the kind stated, and one that has but few working parts, and is con; structed with a view to assuring the thorough sweeping of products of combustion from the explosion chamber by the inrushing explosive mixture, the latter being materially advantageous inasmuch as it contributes-to the reliability and capacity of the engine and economy in the o eration of the same.

Other objects will e understood from the following description and claims when the some are read in connection with the drawing, accompanying and forming part of this specification, in which the figure is a vertical central section of an engine constructed in accordance with the invention.

Referring by letter to the drawing: A is the cylinder, and B the piston of the engine, the piston being, by preference, connected through the usual pitman C with the ordiruiry crank D. The cylinder is divided by the piston into an explosion chamber E and a compression chamber F, and at the center of the inner end of the explosion chamber is an'ignition device G which is preferably, though not necessarily, electric. At H the cylinder is )rovided with a port for the admission of explosive mixture, and at I it has a port for the discharge of products of combustion. Located at the same side of the cylinder as the intake port H and diametrically opposite the exhaust port I is a passage J. This passage is formed in the wall of the cylinder and has both of its ends opposed to the ath of the piston. It will be noticed that t e upper or discharge end a of said passage J is dlsposed or directed toward the longitudinal center and inner end of the explosion chamber; also, that said end a is located in a plane about midway between that of the exhaust ortyl and that of the inner end of the exp osion chamber, for important reasons heremaften set forth. The piston is divided by a transverse parti- Specification of Letters Patent.

Application filed June 16, 1911.

Patented Dec. 5, 1911'.

Serial No. 683,564.

tion 2) into a chambered portionicthat co n municates with the compression chamljenl and a chambered portionml that conunirni cates with the explosion chamber, the

chambered portion 0 being provided with an outlet port 0 designedto register with the outer end of. the passage J, and the chambered portion (1 being provided with an outlet port f, designed to register with the exhaust port I. r a i r The operation is as follows; VVheh the piston is at the innermostkpoint of itstray-i toward the longitudinal cent e g and inner; 3

end of the explosion chamber... Thiscaus es the explosive mixture toqstrike figst. the

inner end of the cylinder near theaspa'fiken then the cylinder wall at a,poiut diajmetri;

rally opposite the passage cnd o and near the inner end of the exploslon chambennnd, from said point the explosiyelmixturegebounds and strikes the pontibmpfihgpi on chamber at adjacent the "fagssag ,l axr fi ly, occupies said chamber. g wig that before the piston closes,thapgssagegpd a and the exhaust port I, thetexplpg' vgti llgfi; ture will have effectually, swept el l gat, products of the previous ewplosipn .f glp a e chamber E; also, h mammalian-E bustion are forced before the explosive mixture from the inner end of the chamber E outward toward the exhaust port, so that all of the products of combustion must be exhausted before any of the explosive mixture can escape, and before the latter can take lace the port I will have been closed. It w' 1 further be noted that because of the course the explosive mixture is caused to take in the explosion chamber E, the same will be put into close proximity with the ignition or sparking device G and will eflectually sweep all prod cts of combustion away from said point, t ereby assuring per-- fect explosive m xture to receive the s ark.

In addition to the advantages set 0rth,'

' plosive mixture.

it may be stated that the piston of the improved engine has a great bearing surface calculated to conduce to smooth running, and that the arrangement of the passage J adjacent the inner end of the piston, as shown, is advantageous because y reason of such arrangement the passage J is remote from the splash of oil in the compression chamber and crank case, and hence there is no liability of an excess of oil ontering the explosion chamber with the ex- Having described our invention, A'vhat we claim and desire to secure by Letters- Patent, is:

1. In an internal combustion engine of the two-cycle type, the combination of a cylinder, a iston, and an ignition device located at t e inner end of the cylinder; the cylinder being divided by the piston into an explosion chamber and a compression chamber, and being provided with a port for the admission of explosive mixture to the compression chamber, a port for the dischar e of products of combustion from the explbsion chamber, and a fpassage having its ends opposed to the path 0 the piston and also having its inner end diametrically opposite the exhaust port and directed toward the longitudinal center and inner end of the ex losion chamber and located in a plane substantially midwaybetween that of the inner end of the cylinder and that of the ex- 7,

haust port, and the piston being, provided with a transverse partition and chambered portions at opposite sides of the same and bein also rovided with a ort for connecting its inner chamber wit1 the exhaust port, and a port for connecting its outer chamber with the outer end of the passage in the cylinder.

2. In an internal combustion engine, the

I combination of a cylinder and a piston; the

cylinder being divided by the piston into an explosion chamber and a compression chamber, and being provided with a port for the admission of explosive mixture to the compression chamber, a ort for the dischar e of products of com ustion from the expdosion chamber, and a passage having an inner end opposed to the path of the piston and also having said inner end opposite the exhaust port and directed toward the longitudinal centerand inner end of the explosion chamber and located in a plane intermediate that of the inner end of the cylinder and that of the exhaust port, and. the piston bein provided with means for establishing an interrupting communication between the ex losion chamber and the exhaust port and being also provided with means for establishing and interrupting communication between the compression chamber and the outer end of the said passage in the cylinder.

In an internal combustion engine, the combination of a cylinder and a piston; the

cylinder being divided by the piston into an explosion chamber and a compression chamber, and being provided with a port for the admission of explosive mixture to the compression chamber, a port for the discharge of products of combustion from the explosion chamber, and a passage having an inner endopposed to the path of the piston and alsohaving said inner end opposite the exhaust port and directed toward the longitudinal center and inner end of the explosion. chamber and located in a plane intermediate that of the inner end of the cylinder and that of the exhaust port; said passage being adapted to be supplied with explosive mixture from the compression chamber, and the piston being provided with means for establishing and interrupting communication between the explosion chamber and the exhaust port and being also provided with means for establishing and interrupting communication between the explosion chamber and the inner end of the said passage.

In testimony whereof we have hereunto set ourhandsin presence of two subscribing witnesses. i

GEORGE A. METCALF. LOUIS T. ROCHELEAU.

Witnesses:

EDGAR L. SPAULDING, EVELYN W. SPAULDING.

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