Two-cycle engine

Details Two-cycle engine Two-cycle engine

1985-07-29

1987-12-22

Feinberg, Craig R.

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

123 65EM, F02B 7502

Patent

active

047140569

ABSTRACT:
A two-cycle engine includes a cylinder block having at least one pair of first and second cylinders, the first and second cylinders having a pair of first and second exhaust ports, respectively. A pair of first and second pistons are received respectively in the first and second cylinders for reciprocal movement therealong, each of the exhaust ports being selectively closed and opened by a respective one of the pistons during the movement thereof along a respective one of the cylinders. The first and second pistons are operatively connected to a crankshaft in such a manner that the first and second pistons are reciprocable 180.degree. out of phase along the respective cylinders. A final portion of the duration of opening of one of the exhaust ports overlaps an initial portion of the duration of opening of the other. An exhaust passage has a communicating portion communicating the first and second exhaust ports with each other adjacent thereto.

REFERENCES:
patent: 3395679 (1968-08-01), Christner
patent: 3543509 (1970-12-01), Boerma
patent: 3695238 (1972-10-01), Boerma
patent: 3875744 (1975-04-01), Brooks et al.
patent: 3938330 (1976-02-01), Nakajima et al.
patent: 4187809 (1980-02-01), Lanpheer et al.
patent: 4197704 (1980-04-01), Date et al.
patent: 4312308 (1982-01-01), Slattery

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