Internal-combustion engines – Two-cycle – Rear compression
Patent
1978-03-13
1980-03-25
Burns, Wendell E.
Internal-combustion engines
Two-cycle
Rear compression
123 73R, F02B 3304
Patent
active
041944704
ABSTRACT:
A two-cycle internal combustion engine having a crankcase with a crankshaft rotatably mounted therein, a cylinder extending from the crankcase and having a piston slidably positioned therein with a connecting rod extending between the piston and the crankshaft, a combustion chamber defined at the end of the cylinder remote from the crankcase, an inlet channel communicating with the crankcase at one end and with an air-fuel mixture providing means at the other end, timing means to control opening and closing of the inlet channel to the crankcase, such timing means preferably being the piston skirt, a boost port extending from the inlet channel at a position between the air-fuel mixture providing means and the crankcase timing means at one end and opening to the cylinder volume at the other end, and a reed valve disposed in the boost port and oriented to control flow such that the air-fuel mixture may flow through the boost port into the cylinder but preclude reverse flow from the cylinder to the input channel.
REFERENCES:
patent: 3687118 (1972-08-01), Nomuro
patent: 3749067 (1973-07-01), Kobayashi et al.
patent: 3752129 (1973-08-01), Kobayashi et al.
patent: 3905341 (1975-09-01), Boyesen
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