US2172541A - Engine - Google Patents

Description

p 12,1939 A. J. MEYER 2,172,541

ENGINE Filed April 21, 1938 3 Sheets-Sheet .1

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BY #iaik ATTORNEY:

A. J. MEYER Sept. 12, 1939.

ENGINE Filed April 21, 1938 3 Sheets-Sheet 2!v I I 1 I Fig.4.

INVENTOR. \7, 2M

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Patented Sept. 12, 1939 UNITED STATES ENGINE Andre J. Meyer, Lexington,

Ky., assignor to Continental Motors Corporation, Detroit, Mich., a.

corporation of Virginia Application April 21, 19

8 Claims.

This invention relates to engines and more particularly to sleeve valve engines in which the sleeve valve means is ported for controlling the engine cyclical events in cooperation with cylinder intake and exhaust ports and the engine piston.

Improved engine performance results from improved scavenging of the cylinder, and since in sleeve valve engines it is more difiicult to properly scavenge the cylinder than in other types of engines, it will be apparent that the application of improved scavenging means is of primary importance with a sleeve valve engine particularly one of the single sleeve valve type embodying a single sleeve of the the type having a combined reciprocating and oscillating movement.

An object of the present invention is to improve sleeve valve engine performance by providing a positive control of engine scavenging in order to attain improved combustion characteristics.

A further object of this invention is to attain such results by utilizing the sleeve valve means and more particularly the sleeve upper edge for controlling engine scavenging.

In the drawings:

Fig. 1 is a vertical sectional view through an engine cylinder,

Fig. 2 is a. diagram showing port area relative to crankshaft angle, and

Figs. 3 to 8 inclusive are diagrammatic showings of various positions of the sleeve ports relative to cylinder ports and the piston.

For convenience, the present invention is shown as embodied in an air cooled engine of the single sleeve valve type, but obviously the principles of this invention could be embodied in other types of sleeve valve engines as well.

The engine herein illustrated includes a cylinder structure 10, a cylinder head structure H, a sleeve valve l2 operable Within the cylinder and preferably of the type having a combined reciprocating and oscillating motion. A piston I3 is operatively associated therewith. The cylinder and sleeve valve are preferably ported for intake and exhaust, the cylinder having intake and exhaust ports I 4 and I5 respectively while the sleeve valve is provided with intake and exhaust ports l6 and I! respectively, and which cooperate with the cylinder intake and exhaust ports in conjunction with the piston outer edge [8 to control the engine cyclical events. The sleeve valve is driven in a combined reciprocating and oscillating motion by a. suitable sleeve driving crank 19, while the piston is connected with 38, Serial No. 203,454

the engine crankshaft (not shown) by means of the usual connecting rod 20.

It will be noted that the sleeve [2 is moved with a combined reciprocating and oscillating motion substantially in the path as indicated by '55 the elliptical diagram 2| in Figs. 3 to 8 inclusive. The piston is reciprocated in the cylinder and the relative position of the sleeve ports with respect to the top edge E8 of the piston with respect to the cylinder intake and exhaust ports 10 is diagrammatically illustrated in Figs. 3 to 8 inclusive. In Fig. 3' it will be noted that the sleeve is being moved downwardly relative to the cylinder and the sleeve exhaust ports I! are just opening the cylinder exhaust ports l5. The piston is moving downwardly at this time but is near the botom of its stroke and will soon reverse its direction.

In Fig. 4 the position of the ports is shown at the beginning of the intake, the sleeve intake .20 ports just coming into registration with the cylinder intake ports, but it will be noted that the piston is moving outwardly of the cylinder and as the same moves very rapidly the piston rapidly assumes a position substantially masking .25 the openings through the cylinder and sleeve intake ports.

Fig. 5 is an intermediate position but shows the outer edge 22 of the sleeve as moving downwardly and beginning to uncover the cylinder .30 intake and exhaust ports, thus permitting the intake gases to sweep through the combustion chamber to effect complete scavenging.

In Fig. 6 the piston is shown at top dead center and as completely masking the sleeve intake .35 and exhaust ports.

Fig. '7 illustrates the piston moving downwardly and illustrates the beginning of the main intake cycle, the sleeve at this point beginning to move outwardly of the cylinder and causing the sleeve outer edge to move above the cylinder intake and exhaust ports to close same.

Fig. 8 illustrates the position of the ports at the end of the exhaust cycle, the end of the exhaust being controlled by arrangement in which 5 the sleeve exhaust ports I! pass out of registration with the cylinder exhaust ports l5 and it will be further noted that the intake port is substantially fully opened permitting the combustible fuel mixture to rush into the engine cylinder in which it is subsequently compressed and then fired.

It will thus be seen that I have arranged a sleeve valve engine construction in which the sleeve cooperates with the cylinder ports in such 5 a way as to open a slight crack in the cylinder intake port so that a complete scavenging of the combustion chamber takes place before the. commencement of the main intake cycle. This is accomplished by so constructing the sleeve that the sleeve outer edge slightly uncovers both the cylinder exhaust and intake ports permitting a clear sweep of the gases across the cylinder and effects a complete displacement of substantially all of the burned gases lying therein with fresh fuel mixture.

It will be also noted that there is provided a very simple means for eifecting complete scavenging of the engine cylinder.

It will be apparent to those skilled in -the art to which this invention pertains that various modifications and changes may be made therein without departing from the spirit of this invention or from the scone of the appended claims.

I claim:

, 1. In an internal combustion engine, a cylinder structure, a single sleeve valve of the combined reciprocating and oscillating type operable in said cylinder structure, said sleeve valve and cylinder having cooperating intake and exhaust ports, and a piston operable therein, said sleeve intake port moving into registration with the cylinder intake port prior to closing of the cylinder exhaust port, said piston moving outwardly of the cylinder during the latter portion of the engine exhaust cycle and actuated to mask said sleeve intake and exhaust ports, said sleeve upper edge being constructed and arranged to open said cylinder exhaust and intake ports for scavenging of the cylinder, said piston moving inwardly of the cylinder during the engine intake cycle and operative to unmask said sleeve intake port to substantially control the beginning of engine intake, said sleeve upper edge moving outwardly of the cylinder to close the cylinder exhaust port substantially prior to the intake of the main combustible charge through said registering sleeve and cylinder intake ports.

2. In an internal combustion engine, a cylinder structure, a single sleeve valve of the combined reciprocating and oscillating type operable in said cylinder structure, said sleeve valve and cylinder having cooperating intake and exhaust ports, and a piston operable therein and cooperating with said sleeve valve to control engine cyclical events, said sleeve valve being constructed and arranged to move its upper edge slightly below the upper edge of said cylinder intake and exhaust ports while said piston is in a position masking said sleeve intake and exhaust ports whereby to provide for scavening of the cylinder immediately prior to the main engine intake cycle.

3. In an internal combustion engine, a cylinder structure, a single sleeve valve of the combined reciprocating and oscillating type operable in said cylinder structure, said sleeve valve and cylinder having cooperating intake and exhaust ports, and a piston operable therein and cooperating with said sleeve valve to control the closing and opening of said sleeve exhaust and sleeve intake ports respectively, said sleeve valve being constructed and arranged to move its upper edge slightly below the upper edge of said cylinder intake and exhaust ports during such time as when the piston is moved to a position masking said sleeve intake and exhaust ports.

4. In an internal combustion engine, a cylinder structure, a single sleeve valve of the combined reciprocating and oscillating type operable in said cylinder structure, said sleeve valve and cylinder having cooperating intake and exhaust ports, and a piston operable therein and cooperating with said sleeve valve to control the closing and opening of said sleeve exhaust and sleeve intake ports respectively, said sleeve valve being constructed and arranged to move its upper edge slightly below the upper edge of said cylinder intake and exhaust ports to open same, said open period of said cylinder intake and exhaust ports overlapping the end of the engine exhaust cycle and the engine intake cycle.

5. In an internal combustion engine, a cylinder ported for intake and exhaust, sleeve valve means operable in said cylinder and relatively movable axially of said cylinder, said sleeve valve means having intake and exhaust ports respectively cooperating with the cylinder intake and exhaust ports to control in part the engine cyclical events, and a piston operable therein and cooperating with the sleeve valve means to control the engine cyclical events in conjunction with the sleeve valve means aforesaid, said sleeve valve means being constructed and arranged to position its upper edge below the upper edge of said cylinder intake and exhaust ports during such time as when the piston is moved to a position masking said sleeve intake and exhaust ports.

6. In an internal combustion engine, a cylinder ported for intake and exhaust, sleeve valve means operable in said cylinder and relatively movable axially of said cylinder, said sleeve valve means having intake and exhaust ports respectively cooperating with the cylinder intake and exhaust ports to control in part the engine cyclical events, and a piston operable therein and cooperating with the sleeve valvemeans to control the engine cyclical events in conjunction with the sleeve valve means aforesaid, said sleeve valve means being constructed and arranged to position its upper edge below the upper edge of said cylinder intake and exhaust ports for a predetermined time following the closing of the engine exhaust through said sleeve exhaust ports.

'7. In a sleeve valve internal combustion engine, a cylinder having intake and exhaust ports, means controlling the engine cyclical events including a sleeve valve having intake and exhaust ports respectively cooperating with the cylinder intake and exhaust ports and operable in said cylinder to have a relatively reciprocating movement axially thereof, said sleeve valve being constructed and arranged to position its upper edge below the upper edge of said cylinder intake and exhaust ports for a predetermined time following the closing of the engine exhaust through said sleeve exhaust ports.

8. In a sleeve valve internal combustion engine, a cylinder having intake and exhaust ports, means controlling the engine cyclical events including a sleeve valve having intake and exhaust ports respectively cooperating with the cylinder intake and exhaust ports and operable in said cylinder to have a relatively reciprocating movement axially thereof, said sleeve valve being constructed and arranged to position its upper edge below the upper edge of said cylinder intake and exhaust ports for a predetermined time following the closing of the engine exhaust through said sleeve exhaust ports, said sleeve valve moving upwardly to position said sleeve upper edge flush with the upper edge of said cylinder intake and exhaust ports soon after the opening of the engine intake through said sleeve intake port.

ANDRE J. MEYER.

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