US1315844A - Beversible fozjb-cycle engine - Google Patents

Description

J. KEISTER.

REVERSIBLE FOUR-CYCLE ENGINE.

APPLICATION FILED JUNE 13. l9l8.

,3 1 5, 844.. Patented Sept. 9, i919.

WITNESSES INVEN TO/i J I a @7 Easter A TTORNEYS JAMES KEISTER, 0F STEUBENVILLE, OHIO.

REVERSIBLE FOUR-CYCLE ENGINE.

Specification of Letters Patent.

Patented Sept. 9, 1919.

Application filed June 13, 1918. Serial No. 239,862.

To all whom it may concern:

Be it known that I, JAMES KEISTER, a citizen of the United States, and a resident of Steubenville, in the county of Jefferson and tate of Ohio, have invented a new and Improved Reversible F our-Cycle Engine, of which the following is a full, clear, and exact description.

This invention relates to a four-cycle engine and has to deal more particularly with improvements relating to an engine of the type disclosed in United States Letters Patent 1,237,054, granted to me August 14, 1917.

The object of the present invention is to improve and simplify the construction and operation of engines of this type so as to be reliable and eflicient in use, comparatively simple and inexpensive to manufacture, and so designed that the inlet and exhaust can be on the same side.

Another object of the invention is to provide an engine of the single sleeve reciprocatory valve type which has only one aperture for the inlet of the explosive charge and the outlet of the spent gases, there being a novel valve device for controlling the admission of the mixture to the port of the sleeve valve and the outlet of the exhaust gases.

With such and other objects in View, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawing the figure illustrates a central vertical section of the engine.

Referring to the drawing, 1 designates the engine cylinder, 2'the reciprocatory piston therein, 3 the sleeve valve which has a sliding fit with the piston and cylinder, the piston being connected with the crank 4 of the main shaft 5, which latter is connected with a secondary shaft 6 throu 'h a half speed transmission 7, which secondary shaft has a crank 8 or equivalent means connected by a link 9 with the sleeve valve 3, whereby the latter is reciprocated at half the rate of the piston 2, there being four strokes of the piston to two strokes of the sleeve valve.

At one side of the cylinder 1 is a valve chamber 10 connected by a port 11 in the cylinder wall and a port 12 in the sleeve valve with the explosion chamber 13 of the engine. Connected with the chamber 10 is an inlet conduit 14 and an exhaust conduit 15. The chamber 10 is cylindrical and has a cover 16 at the top, and under this cover is a piston valve 17 controlling the exhaust, and a mushroom valve 18 is located under the valve 17 to control the inlet of the explosive charges. A port 19 in the side of the valve chamber 10 is closed by the piston valve 17 when the latter is in its lowermost or normal position. Thus, when the piston 2 moves downwardly to draw in a charge of mixture, the valve 18 opens for the fuel to flow in from the conduit 14, and communication with the exhaust conduit 15 is cut off by the valve 17. On the next up stroke the sleeve valve 3 moves to throw the ports 11 and 12 out of register, and consequently the fuel charge is compressed. The port 11 remains closed during the next down stroke, while the expanded gases fired by the spark plug 20 act on the piston. At the end of this stroke the ports 12 and 11 again register, so that the products of combustion will be forced out through the ports 12, 11, chamber 10, port 19 and conduit 15, the valve 17 automatically opening under the pressure of the exhaust gases.

As the valves are entirely automatic in operation and as the sleeve valve has a fixed relation to the movement of the piston, it is obvious that the engine can operate to turn the crank shaft in either direction.

From the foregoing description taken in connection with the accompanying drawing, the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains, and while I have described the principle of operation, together with the device which I now consider to be the best embodiment thereof, I

desire to have it understood that the device port, a valve chamber communicating with the cylinder port, a check valve in the said chamber and arranged to open toward the cylinder port, a mixture supply conduit communicating with the chamber through the said valve, an exhaust conduit, a port between the exhaust conduit and valve chamber, and a piston valve in the valve chamber directly above the check valve normally closing the last-mentioned port and adapted to automatically open under the pressure of the outfiowing exhaust gases when the sleeve valve and cylinder ports register on the exhaust stroke of the piston.

2. In an engine, the combination with a cylinder having a single port for the inlet of the explosive charge and the outlet of the exhaust gases, a sleeve valve in the cylinder and having a single port adapted to move in and out of register with the cylinder port,

and a piston in the sleeve valve, of a cylindrical valve chamber communicating with the cylinder port and having an exhaust port in its opposite side out of alinement with the cylinder port, an inlet conduit leading to the lower portion of the valve chamber, an upwardly opening check valve in the lower part of the chamber and controlling said inlet conduit, an exhaust conduit leading from the exhaust port of the said chamber and a gravity piston valve in the upper part of the chamber directly above the check valve, said piston valve normally closing the exhaust port and adapted to automatically open under the pressure of the outflowing exhaust gases when the sleeve valve and cylinder ports register on the exhaust stroke of the piston.

J AMES KEISTER.

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

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