US1633450A - Engine valve - Google Patents

Description

June 21 1927. 1,633,450

' B. F. M KEE ENGINE VALVE Filed June 25, 1926 2 Sheets-Sheet "l aflventoz g I H attowu o B. F.' Mc-K ENGINE VALVE June 21 1927.

2 Sheets-Sheet 2 Filed June 23, 1926 er y'aminfllfcffe 8 mm Patented June 21, 1927.

UNlTFr STATS BENJAMIN a. MCKEE, or nna, ansas.

n vsnvn VALVE.

Application filed June 23, 1926. Serial No. 118,010.

This invention aims to provide, in an internal combustion engine, a rotary valve embodying novel meansfor supplying fuel, for carrying away the exhaust, and for obtaining clean for the compression, by mechanical control of the combustion chainher.

Figure 1 shows in section, an engine constructed in accordance with the invention, parts being in elevation; Figure 2 is a longitudinal section showing a part of the valve; Figure 3 is a section on the line 33 of Figure 2; Figures 4, 5, 6 and 7 are sectional views showing the valve in different positions.

The frame of the engine embodies a crank case 1, cylinders 2, and a tubular valve casing 3 mounted on the upper ends of the cylinders and water-jacketed as at 3*. The pistons are shown at 4 and are connected by piston rods 5 with cranks 6 on a shaft 7 jonrnaled in the case 1 and provided with a fly wheel 8 and with a sprocket wheel 9, the wheel 9 cooperating with a sprocket chain 10 engaged with a sprocket wheel 11 on the tubular shaft 12 of a hollow valve 14 journaled in the casing 3, the shaft 12 being journaled in a gland 15 on a pipe 16, the valve 14 being supplied at its opposite end with a hollow shaft 17 journaled in the gland 18 on a pipe 19, the pipes 16 and 19 constituting part of the cooling system of the engine, and the construction being such that the cooling medium can pass through the valve 14 by way ofthe parts 19, 17, 12 and 16, and likewise through the jacket 3 and about the ports 20, 21 and 22, which will now be described.

In the casing 3 there is a first port 20, a second port 21 and a third port 22 for each of the cylinders 2. The valve has an external groove or combustion chamber 23 extended part-way around the valve and adapted to register with the port 21. The casing 3 has a vent 24 so located as to communicate with the combustion chamber 23 during a part of the rotationvof the valve 14. The valve 14 has an external groove 25 extended part-way therearound and adapted to register with the port 20. A longitudinal passage in the wall of the valve 14, designated by the numeral 26, communicates with the circumferential inlet chamber 27 in the valve 14, the casing 3 having a fuel inlet 28 which communicates with the chamber 27. 'The valve 14 has a groove 29 extended part-way therearonnd adapted to communicate with the'port 22, the valve 14 having a longitudinal pas- 30 which communicates with the groove 29 and with a circumferential exhaust chamber 31 in the valve 14, the valve casing?) having an outlet 32 which communicates with the exhaust chamber 31. The space between the piston 4 and the cylinder head will be alluded to as the cylinder chamber 50, to distinguish from the groove 23 which may be denominated the combustion chamber.

Referring to Figure 4, and starting from a condition in which there is close clearance between the piston 4 and the cylinder head, the piston 4 begins its suction stroke, and the intake groove 25 comes into registration with the port 20. Fuel enters by way of the port 20, the groove 25, the passage 26, the circumferential inlet chamber 27 and the inlet 28, the port 20 being closed at the appropriate time. Passing toFigure 5, it will be observed that whilst the piston 4 is making its upstroke, or compression stroke, the combustion chamber 23 comes into communication with the port 21 and with the vent 24 for a short time, the result being that any residual exhaust gas,'which has not been discharged in the regular way, hereinafter de scribed, will be forced out by compression, through the vent 24, thus giving a clean charge of explosive mixture in the chamber 23, the chamber being completely scavenged of burned gas. The valve 14 rotates into the position shown in Figure 6, and there is no discharge through the vent 24. When the parts are arranged as in Figure 6, there results the desired degree of compression, unafiected by the vent 24. Passing to Figure 7, it will be obvious that when the exhaust stroke begins, the groove 29 in the valve 14 is in registration with the port 22, and the exhaust gas of the combustion chamber 23 and the cylinder chamber passes out by way of the port 22, the groove 29, the passage 30, the circumferential chamber 31 and the outlet 32.

hat is claimed is An internal combustion engine comprising a cylinder, a piston operating inthe cylinder, the space between the piston and the cylinder head forming a cylinder combustion chamber, a valve casing having a vent, and avalve rotatable in the casing, the valve having a circumferential inlet chamber and a circumferential exhaust chamber, the casing having an inlet for the inlet chamber,

and an outlet for the exhaust chamber, the

tudinal passage establishing coinnmnicatiou between the exhaust groove and the exhaust chamber, the casing having other ports by which the inlet and exhaust grooves communicate With the cylinder combustion chamber, and means for rotating the valve in conso- I nance With the movement of the piston.

In testimony that I claim the foregoing as my own, I have. hereto a'lfixed my signature.

BENJAMIN F. MGKEE.

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