Two-cycle internal combustion engine

Details Two-cycle internal combustion engine Two-cycle internal combustion engine

1987-06-11

1988-03-22

Myhre, Charles J.

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

123568, 123193CP, 123 65VD, 60314, F02B 7502

Patent

active

047321172

ABSTRACT:
A two-cycle internal combustion engine comprises a cylinder head having an intake port and exhaust port opened to a combustion chamber, to which compressed fresh air is introduced via an intake valve. An inclined concavity is formed on a top face of a piston. An exhaust valve is opened earlier than the intake valve when the speed of the downward movement of the piston is relatively high, so that a part of exhaust gas in the exhaust port flows back to the combustion chamber in that condition. An exhaust gas swirl rotating around a cylinder axis is formed when the exhaust gas flows back and the fresh air is slowly introduced onto the exhaust gas swirl in that condition. The inclined concavity serves to smoothly guide the exhaust swirl.

REFERENCES:
patent: 2958315 (1960-11-01), Williams
patent: 3808807 (1974-05-01), Lanpheer
patent: 4318373 (1982-03-01), Soubis
patent: 4357917 (1982-11-01), Aoyama
patent: 4543928 (1985-10-01), von Seggern
patent: 4548175 (1985-10-01), Kawai et al.
patent: 4580533 (1986-04-01), Oda et al.
patent: 4616605 (1986-10-01), Kline
patent: 4682576 (1987-07-01), Nakamura et al.

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