.~.~> Lengthwise scavenging of cylinder by gas from cylinder head to piston
Unofficial Alpha Subclasses: R V
DEFINITION
Classification: 123/69
Two-cycle recompression internal-combustion engines in which air and combustible in the gaseous form are supplied to the working cylinder or combustion-chamber by separate and distinct pumps, each operated by and in unison with the engine, one at least of the constituents being recompressed within the working cylinder before the ignition of the combustible mixture. The air is ordinarily supplied to the working cylinder of the engine before the gas, and such air is frequently designed to more or less completely scavenge the working cylinder. In such cases a part of the air thus supplied remains in the cylinder to form with the gas subsequently supplied thereto the next following charge. The air and gas may, however, enter the working cylinder simultaneously. The air and gas are ordinarily intermixed within the working cylinder before the completion of the compression stroke, so that the complete charge is recompressed in the working cylinder before the ignition thereof and the beginning of the working stroke; but this subclass also includes engines in which one only of the constituents of the charge is recompressed in the working cylinder, in which case the other is supplied thereto under pressure during the working stroke.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61, and 68, for other internal-combustion engines having separate pumps for air and gas.
590+, for oil-engines having one pump for supplying air to the working cylinder thereof and another for supplying oil and air, the oil being frequently atomized by the air, but not vaporized prior to its entry into the working cylinder.
