Two-cycle engine with pure air scavenging

Details Two-cycle engine with pure air scavenging Two-cycle engine with pure air scavenging

1979-07-17

1981-02-03

Burns, Wendell E.

Internal-combustion engines

Two-cycle

Rear compression

123 73CC, 123 73PP, 123 73A, 123 73AF, 123DIG4, 123 65A, F02B 3304

Patent

active

042481856

ABSTRACT:
A two-cycle internal combustion engine includes a cylinder, a piston in the cylinder and a crankcase pump. The crankcase pump is divided into a first chamber and a second chamber by a membrane. At least one respective transfer passage connects each of the respective chambers to the cylinder. Inlets are provided for admitting pure air into the first chamber and for admitting carbureted air into the second chamber. Devices are provided for opening that one of the transfer passages communicating between the cylinder and the first chamber first and thereafter for opening the one of the transfer passages communicating between said cylinder and said second chamber during operation of the engine.

REFERENCES:
patent: 702375 (1902-06-01), Nichols
patent: 976858 (1910-11-01), Easthope, Jr.
patent: 1163604 (1915-12-01), Raser
patent: 1168425 (1916-01-01), Rosenhagen
patent: 1527166 (1925-02-01), Bezu
patent: 2406491 (1946-08-01), DeWaern
patent: 2745390 (1956-05-01), Heidner et al.
patent: 3190271 (1965-06-01), Gudmundsen
patent: 3363611 (1968-01-01), Von Seggern et al.
patent: 3687118 (1972-08-01), Nomura

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