Four-cycle internal-combustion engines provided with an oscillating valve for directly controlling the supply of combustible mixture to the working cylinder or the exhaust of burned gases therefrom and means operated by the engine for oscillating the said valve to secure the continuous and automatic operation of the engine. The oscillating valve ordinarily controls both the supply to and the exhaust from the engine and frequently also a passage used in connection with a flame or incandescent igniting device, and the valve is so designed with reference to the particular engine with which it is used or with reference to other elements of the engine as to be incapable of convenient separation therefrom or of use with other engines.
(1) Note. For oscillating valves capable of general use with internal-combustion engines, the structure of the engine or of elements thereof other than the valve not being involved, see this class, subclass 190.
