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    • 10. 发明授权
    • Two-stroke engine piston stuffer
    • 两冲程发动机活塞
    • US3604403A
    • 1971-09-14
    • US3604403D
    • 1969-11-18
    • MARVIN P LARSON
    • LARSON MARVIN P
    • F01P1/02F02B25/00F02B33/04F02B75/02
    • F02B33/04F01P1/02F02B25/00F02B2075/025F02B2700/034
    • A crankcase mounted body projecting upwardly into the cylinder bore of a two-cycle internal combustion engine of the type utilizing crankcase air and fuel induction and bypass passages for ducting the air and fuel mixture from the crankcase into the cylinder above the piston therein as the piston approaches its lowermost position in the cylinder. The body is specifically shaped to have the piston telescoped downwardly thereover as the piston approaches its lower limit in the cylinder and the body, by its volume, reduces the total volume of the associated crankcase and lower cylinder bore whereby crankcase back pressure on the downstroke of the piston is increased for a greater discharge of air and fuel mixture into the cylinder above the piston. In addition, the body includes portions thereof which project substantially upwardly into the associated piston when the latter is at its lowermost position and which therefore serve to pump normally static air and fuel mixtures from within the piston each time the latter is telescoped downwardly over the body to thereby facilitate internal cooling of the piston.