Internal-combustion engines – Two-cycle – Rear compression
Patent
1989-07-10
1990-06-19
Okonsky, David A.
Internal-combustion engines
Two-cycle
Rear compression
123316, 123532, F02M 6704
Patent
active
049343467
ABSTRACT:
The invention provides an internal combustion engine comprising a cylinder having a head end and adapted to have air and fuel combusted therein and a piston reciprocate therein relative to the head end, an exhaust port adapted to conduct combusted air and fuel from the cylinder, structure defining an accumulation chamber, a passageway communicating with the accumulation chamber and with the cylinder at a predetermined position located between the exhaust port and the top dead center position, and structure for blocking the passageway in response to travel of the piston toward the head end and to passage of at least a portion of the piston over the predetermined position, so that the accumulation chamber is substantially prevented from receiving combusted air and fuel when the piston travels away from the head end.
REFERENCES:
patent: 1551731 (1925-09-01), Charter
patent: 3800754 (1974-04-01), Carlson et al.
patent: 4141675 (1979-02-01), O'Neill
patent: 4471728 (1984-09-01), Borst et al.
patent: 4599983 (1986-07-01), Omachi
patent: 4627390 (1986-12-01), Antoine
patent: 4765304 (1988-08-01), Brown
patent: 4829958 (1989-05-01), Duret
Okonsky David A.
Outboard Marine Corporation
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