US1366315A - Internal-combustion engine - Google Patents

Description

H. E. FENCHELLE.

INTERNAL COMBUSTION ENGINE.

APPLICATION man JUNE 18. 191s.

1,366,315. Patented Jan. 18,1921.

kw w INVENTOR HUGE". E. FENCI-IELLE, 0F GENOA, ITALY, ASSIGNOR TO WILLIAM L. KANN FFME.

TRUSTEE, OF PITTSBURGH, PENNSYLVANIA.

INTERNAL-COMBUSTIQN ENGINE.

escasas.

Speciication of Letters Patent.

atented Jan. 1S, 1921..

To all w hom it may concern.:

Be it known that I, HUGH E. FENUHELLE, a resident of Genoa, Italy, have invented a new and useful Improvement in Internal- Combustion Engines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this speciication, in which: l

Figure l is a sectional view largely diagrammatic of an engine embodying my invention;

Fig. 2 is a similar view of a portion of the engine with the moving parts in different positions. I

My invention has relation to improvements in internal combustion engines, and more particularly to engines of the two-cycle type in which the power is derived from the combustion of the fuel mixture within the en ine cylinder. K

eretofore, numerous attempts have been made to increase the power of engines of this type by increasing the volume of air introduced into the motor cylinder during the compression stroke. In so far as I am aware, such attempts have not been successful to any great degree, because the supplemental air employed has been derived from the same source of supply as that employed for scavenging at the beginning of the compression stroke. crease the pressure of this air, the results are disadvantageous for two reasons: First, the scavenging is then produced by means of air under high pressure and high velocity and imperfect scavenging results; and sec- 0nd, the force absorbed, by the pump which supplies the scavenging air, largelyv if not altogether offsets the increased power due to the use of such air in the charge.

My invention is designed to increase the power of engines of this character by the introduction -of high pressure air into the motor cylinder during the combustion stroke and after combustion has been initiated. In accordance with my invention, this supplemental air supply is derived from any suitable source, and itsintroduction into the cylinder is controlled by means of an ordinary valve actuated by suitable connections With the movable part or parts of the engine.

In the accompanying drawing, I have illustrated more or less conventionally a form of engine embodying my invention.

If it is attempted to in-v from a source of air under relatively low pressure, such as the pump 7 havingr the piston 8. The numeral 9 designates an auxlliary air supply port which leads through a valve seat 10 into a chamber 11, connected by a passage 12 with a source of air under relatively high pressure, such as the pump 13. The port 9 is controlled by a slide valve 14, mounted in the seat 10 and having a peripheral port l5, adapted, when the valve is in the right position, to form a means of communication between the air chamber 11 and said port 9. This valve is shown as actuated by a pitmanrod 16, connected to a crank 17 on a shaft 18, which may be geared to the main crank shaft 19 in any known manner, so as to rotate at the same speed as said main shaft.

In Fig. 1, the parts are represented as in the positions which they occupy at the time the piston is at the end of the combustion stroke, the exhaust port 4 having opened as has also the scavenging port 5. As the piston commences its compression stroke, air

under relatively low pressure continues to enter the cylinder through the port 5 to continue the scavenging until such time as the piston closes the exhaust ports 4. At this time, the valve'14 has opened the port 6 and charge-forming air from the same source of supply Hows into the cylinder and is compressed in the usual manner.

At the desired point in the compression stroke, the port 9 is uncovered and the valve 14 is then inthe position shown in Fig. 2, thereby admitting air under high pressure into the engine cylinder for the purpose of eecting and supporting combustion therein. As the piston 3 passesv the port 9, the valve 14 will be closed before the exhaust port 4 is again opened.

While-I have shown the valve' 15 as arranged when in the position shown in Fig. 1. to close the port 6, this is immaterial, as ports 5 and 6 may both be controlled solely by the piston 8. It will also be understood that any suitable form of valve may be employed to control the port 9, that the valve may be actuated by any suitable connection with a moving part or parts of the engine, and that the source of air supply and the connections leading therefrom to the engine may be Widely changed, without departing from the spirit and scope of my invention, as set forth in the appended claims.

AThe advantages of my invention result from the provision of means whereby air under relatively high pressure may be forcedinto the engine cylinder .during the explosion stroke, after combustion has been initiated, thereby greatly increasing the power delivered by the engine.

I claim:

l. An internal combustion engine having port means for introducing air during the compression stroke, means connecting said portto a source of air supply under` rela-l tively low pressure, the engine having another air-admission port connected with a source of air supply under higher pressure, and a single valve controlling both said ports and operatingto admit an' to the' engine cylinder through the main port on the compression stroke of the engine and to admit air at higher pressure through the second named port during a portion of the combustion stroke; substantially as described.

2. An internal combustion engine having port means for introducing air during the compression stroke, means connecting said port to a source of air supply under relatively low pressure, the engine having another air-admission port connected with a source of air supply under higher pressure, and a single valve controlling both said ports and operating to admit air to the engine cylinder through the main port on the compression stroke of the engine and to admit air at higher pressure through the second named port during a portion of the combustion stroke, the cylinder also having a scavenging port connected with the source of air which is under lower pressure; substantially as described.

3. An internal combustion engine having port means for introducing air during the compression stroke, means connecting said port to a source of air supply under relatively low pressure, the engine having another air-admission port connected with a source of air supply under-higher pressure, and a single valve controlling both said ports and operating to admit air to the engine cylinder through the main port on the compression stroke of the engine and to admit air at higher pressure through the second named port during a portion of the combustion stroke, the cylinder also having a scavenging port' connected with the source of air which is under lower pressure, said port also being controlled by the aforesaid y valve; substantially as described.

ln testimony whereof, I have hereunto set my hand.

' HUGH E. FENCHELLE.

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